Polymorphism of the renin-angiotensin system genes and endothelial NO-synthase gene in obese patients with arterial hypertension
The review is dedicated to relationships between the blood pressure and body mass. Endothelial dysfunction and imbalance of neurohumoral systems, namely, the pathological increase in the activity of the renin-angiotensin system, in combination with obesity are the main mechanisms of the of the hyper...
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Ashcheulova, T.V. Gerasimchuk, N.N. Demydenko, G.V. Kulikova, M.V. 2019-06-15T14:17:19Z 2019-06-15T14:17:19Z 2018 Polymorphism of the renin-angiotensin system genes and endothelial NO-synthase gene in obese patients with arterial hypertension / T.V. Ashcheulova, N.N. Gerasimchuk, G.V. Demydenko, M.V. Kulikova // Вiopolymers and Cell. — 2018. — Т. 34, № 5. — С. 331-349. — Бібліогр.: 66 назв. — англ. 0233-7657 DOI: http://dx.doi.org/10.7124/bc.000988 https://nasplib.isofts.kiev.ua/handle/123456789/154346 616.12-008.331-056.257:575.174.015.3:577.112.386:546.172.6 The review is dedicated to relationships between the blood pressure and body mass. Endothelial dysfunction and imbalance of neurohumoral systems, namely, the pathological increase in the activity of the renin-angiotensin system, in combination with obesity are the main mechanisms of the of the hypertonic disease pathogenesis. Here we discuss the research on polymorphism of the renin angiotensinic system genes and the endothelial synthase nitric oxide gene. The difficulty lies in the correct assessment of associations of alleles which have clinical significance. It is essential to determine precisely the associations of gene polymorphisms in the hypertonic disease with obesity. This provides an opportunity to identify new personified approaches to the treatment of patients with this complex pathology. Keywordsendothelial nitric oxide synthase, renin-angiotensin system, gene polymorphism, hypertonic disease, obesity У статті представлений клінічно встановлений взаємозв'язок підвищеного артеріального тиску зі збільшенням маси тіла. Показано, що ендотеліальна дисфункція і дисбаланс нейро-гуморальних систем, а саме патологічне підвищення активності ренін-ангіотензинової системи, виступають провідними механізмами патогенезу гіпертонічної хвороби в поєднанні з ожирінням. Даний огляд літератури присвячений інтерпретації наукових досліджень в області поліморфізму генів ренін ангіотензинової сиcтеми і гена ендотеліальної синтази оксиду азоту. Складність полягає в правильній оцінці асоціацій алелей, які мають клінічне значення. Особливо важливо завжди точно визначати асоціації поліморфізму генів при гіпертонічній хворобі з ожирінням. Інформація про подібні асоціації і зв'язки надає можливість для пошуку нових тактик і мішеней впливу, що розвиває персоніфіковані підходи до терапії пацієнтів з даною комплексною патологією. В статье представлены данные о взаимосвязи повышения уровня артериального давления и увеличения массы тела. Показано, что эндотелиальная дисфункция и дисбаланс нейрогуморальных систем, а именно патологическое повышение активности ренин-ангиотензиновой системы выступают ведущими механизмами патогенеза гипертонической болезни в сочетании с ожирением. Данный обзор литературы посвящён интерпретации научных изысканий в области полиморфизма генов ренин ангиотензиновой сиcтемы и гена эндотелиальной синтазы оксида азота. Трудность заключается в правильной оценке ассоциаций аллелей, которые имеют клиническое значение. Особенно важно точное определение ассоциаций полиморфизма генов при гипертонической болезни с ожирением. Информация о подобных ассоциациях и связях предоставляет возможности для поиска новых тактик и мишеней для воздействия, что развивает персонифицированные подходы к терапии пациентов с данной комплексной патологией. en Інститут молекулярної біології і генетики НАН України Вiopolymers and Cell Reviews Polymorphism of the renin-angiotensin system genes and endothelial NO-synthase gene in obese patients with arterial hypertension Поліморфізм генів ренін-ангіотензинової системи та гена ендотеліальної NO-синтази у хворих на артеріальну гіпертензію з ожирінням Полиморфизм генов ренин-ангиотензиновой системы и гена эндотелиальной NO-синтазы у больных артериальной гипертензией с ожирением Article published earlier |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine |
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DSpace DC |
| title |
Polymorphism of the renin-angiotensin system genes and endothelial NO-synthase gene in obese patients with arterial hypertension |
| spellingShingle |
Polymorphism of the renin-angiotensin system genes and endothelial NO-synthase gene in obese patients with arterial hypertension Ashcheulova, T.V. Gerasimchuk, N.N. Demydenko, G.V. Kulikova, M.V. Reviews |
| title_short |
Polymorphism of the renin-angiotensin system genes and endothelial NO-synthase gene in obese patients with arterial hypertension |
| title_full |
Polymorphism of the renin-angiotensin system genes and endothelial NO-synthase gene in obese patients with arterial hypertension |
| title_fullStr |
Polymorphism of the renin-angiotensin system genes and endothelial NO-synthase gene in obese patients with arterial hypertension |
| title_full_unstemmed |
Polymorphism of the renin-angiotensin system genes and endothelial NO-synthase gene in obese patients with arterial hypertension |
| title_sort |
polymorphism of the renin-angiotensin system genes and endothelial no-synthase gene in obese patients with arterial hypertension |
| author |
Ashcheulova, T.V. Gerasimchuk, N.N. Demydenko, G.V. Kulikova, M.V. |
| author_facet |
Ashcheulova, T.V. Gerasimchuk, N.N. Demydenko, G.V. Kulikova, M.V. |
| topic |
Reviews |
| topic_facet |
Reviews |
| publishDate |
2018 |
| language |
English |
| container_title |
Вiopolymers and Cell |
| publisher |
Інститут молекулярної біології і генетики НАН України |
| format |
Article |
| title_alt |
Поліморфізм генів ренін-ангіотензинової системи та гена ендотеліальної NO-синтази у хворих на артеріальну гіпертензію з ожирінням Полиморфизм генов ренин-ангиотензиновой системы и гена эндотелиальной NO-синтазы у больных артериальной гипертензией с ожирением |
| description |
The review is dedicated to relationships between the blood pressure and body mass. Endothelial dysfunction and imbalance of neurohumoral systems, namely, the pathological increase in the activity of the renin-angiotensin system, in combination with obesity are the main mechanisms of the of the hypertonic disease pathogenesis. Here we discuss the research on polymorphism of the renin angiotensinic system genes and the endothelial synthase nitric oxide gene. The difficulty lies in the correct assessment of associations of alleles which have clinical significance. It is essential to determine precisely the associations of gene polymorphisms in the hypertonic disease with obesity. This provides an opportunity to identify new personified approaches to the treatment of patients with this complex pathology. Keywordsendothelial nitric oxide synthase, renin-angiotensin system, gene polymorphism, hypertonic disease, obesity
У статті представлений клінічно встановлений взаємозв'язок підвищеного артеріального тиску зі збільшенням маси тіла. Показано, що ендотеліальна дисфункція і дисбаланс нейро-гуморальних систем, а саме патологічне підвищення активності ренін-ангіотензинової системи, виступають провідними механізмами патогенезу гіпертонічної хвороби в поєднанні з ожирінням. Даний огляд літератури присвячений інтерпретації наукових досліджень в області поліморфізму генів ренін ангіотензинової сиcтеми і гена ендотеліальної синтази оксиду азоту. Складність полягає в правильній оцінці асоціацій алелей, які мають клінічне значення. Особливо важливо завжди точно визначати асоціації поліморфізму генів при гіпертонічній хворобі з ожирінням. Інформація про подібні асоціації і зв'язки надає можливість для пошуку нових тактик і мішеней впливу, що розвиває персоніфіковані підходи до терапії пацієнтів з даною комплексною патологією.
В статье представлены данные о взаимосвязи повышения уровня артериального давления и увеличения массы тела. Показано, что эндотелиальная дисфункция и дисбаланс нейрогуморальных систем, а именно патологическое повышение активности ренин-ангиотензиновой системы выступают ведущими механизмами патогенеза гипертонической болезни в сочетании с ожирением. Данный обзор литературы посвящён интерпретации научных изысканий в области полиморфизма генов ренин ангиотензиновой сиcтемы и гена эндотелиальной синтазы оксида азота. Трудность заключается в правильной оценке ассоциаций аллелей, которые имеют клиническое значение. Особенно важно точное определение ассоциаций полиморфизма генов при гипертонической болезни с ожирением. Информация о подобных ассоциациях и связях предоставляет возможности для поиска новых тактик и мишеней для воздействия, что развивает персонифицированные подходы к терапии пациентов с данной комплексной патологией.
|
| issn |
0233-7657 |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/154346 |
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Polymorphism of the renin-angiotensin system genes and endothelial NO-synthase gene in obese patients with arterial hypertension / T.V. Ashcheulova, N.N. Gerasimchuk, G.V. Demydenko, M.V. Kulikova // Вiopolymers and Cell. — 2018. — Т. 34, № 5. — С. 331-349. — Бібліогр.: 66 назв. — англ. |
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331
T. V. Ashcheulova, N. N. Gerasimchuk, G. V. Demydenko
© 2018 T. V. Ashcheulova et al.; Published by the Institute of Molecular Biology and Genetics, NAS of Ukraine on behalf
of Biopolymers and Cell. This is an Open Access article distributed under the terms of the Creative Commons Attribution
License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any
medium, provided the original work is properly cited
UDC 616.12-008.331-056.257:575.174.015.3:577.112.386:546.172.6
Polymorphism of the renin-angiotensin system genes and endothelial
no-synthase gene in obese patients with arterial hypertension
T. V. Ashcheulova, N. N. Gerasimchuk, G. V. Demydenko, M. V. Kulikova
Kharkiv National Medical University
4, Nauki Ave., Kharkiv, Ukraine, 61001
nino.gerasimchuk@gmail.com
The review is dedicated to relationships between the blood pressure and body mass. Endothelial
dysfunction and imbalance of neurohumoral systems, namely, the pathological increase in the
activity of the renin-angiotensin system, in combination with obesity are the main mechanisms
of the of the hypertonic disease pathogenesis. Here we discuss the research on polymorphism
of the renin angiotensinic system genes and the endothelial synthase nitric oxide gene. The
difficulty lies in the correct assessment of associations of alleles which have clinical signifi-
cance. It is essential to determine precisely the associations of gene polymorphisms in the
hypertonic disease with obesity. This provides an opportunity to identify new personified
approaches to the treatment of patients with this complex pathology.
K e y w o r d s: endothelial nitric oxide synthase, renin-angiotensin system, gene polymorphism,
hypertonic disease, obesity.
Introduction
Genetic polymorphism is the presence of al-
leles, different variants of one gene, in a pop-
ulation. Herewith the allele can be considered
as polymorphism, if the frequency of its oc-
currence in the population is not less than 1 %.
Human genome polymorphisms are decisive
for the development, progression and thera-
peutic intervention for various pathological
conditions. Polymorphisms in different genes
contribute to functional changes in the protein
activity or expression. Therefore, it is impor-
tant to clarify not only the effect of individual
polymorphisms on the function of genes, but
also the relationship between polymorphisms
in different genes, especially those that are
functionally related [1]. The structure and ac-
tivity of the protein products of the gene may
depend on the variant of the allele.
It is generally believed that the environmen-
tal and genetic factors influence the formation
of arterial hypertension (AH) phenotype and
determine its progression. At present, a sig-
nificant role in the pathogenesis of polygenic
diseases, in particular, arterial hypertension
(AH), is given to genetic polymorphisms.
A number of studies have revealed the connec-
Reviews ISSN 1993-6842 (on-line); ISSN 0233-7657 (print)
Biopolymers and Cell. 2018. Vol. 34. N 5. P 331–349
doi: http://dx.doi.org/10.7124/bc.000988
mailto:nino.gerasimchuk@gmail.com
332
T. V. Ashcheulova, N. N. Gerasimchuk, G. V. Demydenko et al.
tion between numerous polymorphic markers
of genes, coding the components of the renin-
angiotensin-aldosterone system (RAAS), the
sympathoadrenal system (SAS), endothelial
and other factors with the AH development.
All over the world, hypertension (HD) oc-
cupies a leading place in the structure of car-
diac pathology and, due to its spreading among
people of working age and early development
of complications that lead to prolonged dis-
ability and invalidization is an urgent medical
and social problem. Arterial hypertension (AH)
as a starting and modelling mechanism in-
duces the development of pathological chang-
es in the cardiovascular system and internal
organs [1]. At present, AH goes beyond med-
ical problems taking a multidisciplinary and
socially significant character.
The risk of complications and death in the
AH patients increases according to numerous
concomitant risk factors. AH in isolated form
occurs only in 8 % of cases, whereas in others
it is combined with one or more factors of
cardiovascular risk. In 20–22 % of cases AH
is combined with hyperlipidemia, in 30 % with
hyperlipidemia and obesity, whereas 32 % of
patients suffered from dyslipidemia, obesity
and various disorders of carbohydrate me-
tabolism — glucose intolerance, insulin resis-
tance, 2nd type diabetes mellitus (DM
type 2) [2].
There are many researches on the genetic
mechanisms of susceptibility to cardiovascular
disease (CVD). Recently, it has been proved
that genetic predisposition contributes to the
inheritance of AH. The genetic factors can play
a significant role in the development of AH
confirming its polygenic nature. Therefore, the
search for the genetic markers of the renin-
angiotensin system ( RAS) responsible for the
development of AH and related disorders,
namely obesity, and carbohydrate metabolism
is an urgent problem of great interest to many
scientists. The genetic polymorphism [3] is
proved to be a significant factor affecting a
level of expression of endothelial nitric oxide
synthase (eNOS). The level and activity of NO
depend on the allelic variant of the NO syn-
thesis genes. In this regard, the study on the
genes involved in the synthesis of NO (primar-
ily eNOS) has become an important step in
identifying the genetic risk factors for CVD.
Their study is complex because of the large
number of genes that can participate in the
formation of hereditary predisposition either
independently or through interaction with each
other. Recently, a huge amount of information
has been accumulated regarding polymorphic
regions of the human genome as a whole, as
well as their correlation with various diseases.
Modern strategy for researching a genetic
predisposition is based on the study of the
polymorphic markers of candidate genes.
These are genes, the expression products of
which are involved in the pathogenesis of this
disease. Importantly, the genetic predisposition
to such multifactorial pathologies, as АН and
obesity is also polygenic, which requires an
assessment of the integrated genetic panel. To
clarify the nature of the link between the gene
and metabolic state of the organism, single
nucleotide polymorphisms (SNPs) are inves-
tigated. SNPs are defined as loci with alleles
that differ at a single base, with a frequency
of at least 1 % in a random set of individuals
in the population [4].
Nowadays, the polymorphism of dozens of
genes has been found that claims the role of
https://www.sciencedirect.com/science/article/pii/B978012383834600015X
333
Polymorphism of the renin-angiotensin system genes and endothelial no-synthase gene in obese patients with arterial hypertension
hereditary markers of atherosclerosis, AH,
coronary heart disease (CHD), myocardial
infarction, chronic heart failure (CHF), and
microvascular complications in type 2 diabe-
tes, namely, diabetic retinopathy and nephrop-
athy [5,6]. However, their clinical and prog-
nostic values are not completely comprehen-
sible; besides, the literature data are obviously
contradictory.
The pathogenesis of hypertensive disease
(HD) in obese persons is a multicomponent
process, including an increase of circulating
blood volume, vasoconstriction, and hyperac-
tivity of sympathoadrenal, renin angiotensin
systems, and metabolic disorders. One of the
early phases of the pathogenesis of this com-
plex pathology is the development of endothe-
lial dysfunction (ED).
Due to the fact that the leading mechanisms
for the development of cardiovascular disease
are ED and the imbalance of the neurohu-
moral systems of the body, in particular the
pathological increase in the activity of the
renin-angiotensin system (RAS), it is the
search and study of the polymorphisms of the
genes of these systems is the most relevant
today.
The genome-wide association studies
(GWASs) have identified thousands of genes
and genetic variants (mainly SNPs) that con-
tribute to the complex diseases in humans. At
the heart of the GWAS-based approaches lies
the “common variant–common disease” hy-
pothesis. The arrival of Next-Generation
Sequencing (NGS) technologies facilitated a
shift in focus from common to rare variants
and provided the opportunity to unravel the
genomic architecture underlying a hyperten-
sion risk.
Neurohumoral system in regulation
of vascular tone and endothelial-de-
pendent vasodilation in patients with
hypertonic disease with obesity
The main components of the renin-angiotensin
system (RAS) are angiotensinogen (AGT),
angiotensin converting enzyme (ACE) and
angiotensin II (AT II) in patients with AH.
For many decades considerable attention
has been paid to determining the role of RAS
in the development of cardiovascular disor-
ders, namely in the pathogenesis of AH. RAS
plays a special role in vasoconstriction and
vasodilation, regulating long-term blood pres-
sure. Juxtaglomerular kidney cells secrete the
enzyme renin. Renin proteolizes the inactive
peptide of angiotensinogen, converting it into
angiotensin I (AT I). AT I is then transformed
into AT II using ACE.
AT II is one of the strongest vasoconstric-
tors. In kidneys, AT II leads to the contraction
of glomerular arterioles, thus changing the
glomerular filtration rate. In the adrenal cortex,
AT II causes the release of aldosterone, which
in turn affects the renal tubules, which leads
to reabsorption of the majority of sodium and
water ions from the urine due to displacement
of potassium ions in the renal tubules.
Aldosterone also affects the central nervous
system, increasing the appetite of humans to
salt and causing a feeling of thirst. Besides,
AT II is able to increase the inflammatory
potential, to provoke oxidative stress and en-
dothelium dysfunction, to activate atheroge-
nesis [7].
Two types of receptors are involved in the
implementation of AT II influence on the heart
and blood vessels. The receptors of AT II type
1 (AT1 receptors) mediated the main physi-
334
T. V. Ashcheulova, N. N. Gerasimchuk, G. V. Demydenko et al.
ological and pathophysiological effects of AT
II whereas the role of type 2 receptors (AT2
receptors) remains controversial. Under normal
conditions, they are present in a small amount
in the vascular endothelium, but their expres-
sion significantly increases in various patho-
logical conditions associated with inflamma-
tion and remodelling of the heart and vessels:
AH, atherosclerosis, DM type 2, myocardial
infarction [8].
It was determined that AT II participates in
the regulation of growth and development of
adipose tissue [9]. Today it is known that the
formation of AT II is not limited to the system
circulation, it can be synthesized in a variety
of tissues. In recent years much attention has
been paid to adipose tissue, which is no longer
considered only as an energy depot.
The increased levels of adipocyte-secreted
angiotensin are an important link between
visceral obesity and ED, as evidenced by the
correlation between the “waist circumference
/ hip circumference” and the level of RNA
angiotensinogen (AGT) of visceral and subcu-
taneous adipose tissue. Further enhancement
of the AT II production at the tissue level stim-
ulates the secretion of superoxide — a leading
factor in the etiology of ED. Thus, the activa-
tion of vascular RAS in subjects with abdom-
inal obesity should be considered as a leading
mechanism of ED [10].
At present, the leading role of endothelium
and nitric oxide (NO) in the genesis of cardio-
vascular complications of HD has been prov-
en. Endothelium is rightly called the largest
endocrine gland of the body.
In physiological conditions, there is pre-
dominance of secretion of substances that
cause relaxation, one of which, nitric oxide
(NO) controls the basal tone of arterial vessels
and, as a consequence, the blood pressure
level. NO is a universal regulator of physio-
logical functions, in particular a powerful
vasodilator. For HD, the main factor in the
development of ED is the reduction of NO
synthesis with preserved or increased secre-
tion of vasoconstrictors (endothelin-1, angio-
tensin II), which aggravate endothelium-de-
pendent relaxation, lead to the degradation
and changes in the cytoarchitectonics of blood
vessels. The main target of NO is soluble
guanylate cyclase, the heme of which is a
receptor for NO. The heme-linked NO in-
duces soluble guanylate cyclase, which leads
to the enhanced synthesis of cyclic guanosine
monophosphate (cGMP). Nitric oxide is
formed in endothelial cells from L-arginine
under the action of enzymes of the NO-
synthase system — constitutional neuronal
(NO-synthase type 1, NOS 1 or nNOS), “in-
ducible” (NO-synthase type 2, NOS 2 or
iNOS) and constitutional endothelial (NO-
synthase type 3, NOS 3 or eNOS). In the ac-
tive form all three isoforms are homodimers
having a molecular weight of 130 (iNOS),
135 (eNOS) and 160 (nNOS) kDa [11]. The
formation of NO is regulated by altering the
expression or activity of the еNOS enzyme
itself, as a result, of changes in the activity of
either cofactors, or endogenous inhibitors.
A number of studies have shown that a
deficiency of NO in the blood leads to a num-
ber of CVDs. The risk of AH significantly
increases with the excess body weight and
obesity. Body mass closely correlated with BP.
In some studies at the population level, it has
been shown that overweight is an independent
risk factor for hypertension. In recent years,
335
Polymorphism of the renin-angiotensin system genes and endothelial no-synthase gene in obese patients with arterial hypertension
the term “obesity-induced hypertension” has
appeared [12].
In connection with the study of mechanisms
that regulate energy metabolism and provide
neurohumoral homeostasis, new concepts have
been rebuilt for the presence of pathogenetic
links between excess body weight and in-
creased levels of blood pressure (BP). The
effect of excess body weight on the level of
BP depends on the genetic and neurobiological
mechanisms that underlie the development of
obesity.
Obesity contributes to the development of
AH, and AH can cause a decrease in the sen-
sitivity of peripheral tissues to insulin and
further obesity [13]. The probability of devel-
opment of AH in persons with excess body
weight is 50 % higher than in those with nor-
mal body mass (Framingham Study) [14].
About 75 % of cases of AH are associated with
obesity, but the mechanism by which it pro-
motes the development of AH is not yet fully
studied. A rise in body weight by 5 % in-
creases the risk of AH by 30 % over four years.
The frequency of AH increases to 55 % in
those who had BMI greater than 30 kg/m2
regardless of gender and age [15]. In a number
of observations, attention was drawn to the fact
that along with the degree of obesity a sig-
nificant factor in the cardiovascular disease is
a mode of the distribution of adipose tissue. It
is abdominal obesity [16], which is mainly
located in the upper half of the body more
often than the accumulation of fat in the lo wer
half of the body (hyoid or peripheral), is com-
bined with cardiovascular disease and morta-
lity, accompanied more often by a violation of
glucose tole rance, diabetes mellitus and dys-
lipidemia.
Polymorphism of the renin-
angiotensin system genes and
cardiometabolic risk
One of the key components of RAS is angio-
tensin converting enzyme (ACE). Normally,
in different people, the ACE levels in blood
plasma can vary up to 5 times. In a particular
person, the ACE level is fairly stable. Such
fluctuations in the level of ACE among people
are caused by the polymorphism of the ACE
gene. The ACE gene is charted in chromosome
17q23. In the 16th intron of the ACE gene, an
insertion-deletion (I/D) polymorphism
(rs1799752) was found, which is one of four
SNPs representing perhaps the best studied
ACE SNP. It is actually not a single nucleotide
polymorphism at all; instead, it is an insertion/
deletion of an Alu repetitive element of 287
pairs of nucleotides in intron of the ACE gene.
Alleles containing the insertion are called “I”
alleles, and “D” alleles lack the repetitive ele-
ment. The Alu-repeat deletion results in an
increase in the expression of the ACE gene. In
this case, there was a correlation between D
alleles and the level of ACE in blood, lymph
and tissues. The level of ACE in serum in
healthy people who are homozygous for D
allele (DD genotype was observed in approx-
imately 36 % of people) was almost twice as
high as in homozygous for I allele (II - geno-
type, about 17 % of people) and had an aver-
age value in heterozygous — ID genotype
(47 %). The gene polymorphism is also as-
sociated with ACE level in the human heart.
Thus, the presence of allelic variant D leads
to an increased content of angiotensin II, a
decrease in the level of bradykinin and may
be a risk factor for the development of cardio-
vascular disease [16].
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T. V. Ashcheulova, N. N. Gerasimchuk, G. V. Demydenko et al.
To date, a number of data on the association
of the ACE gene polymorphism with myocar-
dial infarction, sudden death, hypertension, left
ventricular hypertrophy (LVH), hypertrophic
cardiomyopathy, endothelial dysfunction, kid-
ney disease and microvascular complications
of diabetes mellitus have been accumulated
[16, 17]. In particular, it was found that the
presence of allele D in the genotype of patients
was associated with higher levels of BP (both
systolic and diastolic), predisposition to the
crisis course of hypertension and a signifi-
cantly higher severity of left ventricle myocar-
dial hypertrophy. The presence of genotype II
in patients with hypertension, on the contrary,
was associated with its asymptomatic course
and a significantly later age of manifestation
[18]. Additionally, it has been shown that the
genotype DD is more common in the patients
with CHD, diabetes mellitus and other risk
factors (hyperlipidemia, smoking, family his-
tory of CVD) [16,17,19]. The DD variant of
the genotype was associated with any myocar-
dial infarction, as well as a stroke and the
development of AH [20].
The data of another study show that in the
survey of a fairly large population (3145 peo-
ple) in the framework of Framingham study,
it was found that the presence of the D-allele
of the ACE gene in men is associated with a
higher level of BP, especially the marked as-
sociation of D-allele was observed with the
level of DBP. For women, such patterns were
not found [21].
On the other hand, there is also evidence of
the absence of association of the ACE poly-
morphism with hypertension. Later, the same
author established that the connection is absent
in the groups with a milder degree of hyperten-
sion, and in the persons with a malignant form
of the DD genotype it occurs 3 times more
often. The results of the initial studies were
subsequently called into question in more ex-
tensive studies and through using randomized
and well-organized groups. As a rule, many
researchers do not take into account the popu-
lation and ethnic features of clinical material.
In multifactorial diseases, the genetic system
of polygenes is represented by a huge poly-
morphism of alleles of genes, the effects of
which may be separately not so significant or
manifested in certain circumstances. And be-
cause of ethnic diversity and high migration
of people with different forms of hypertension
it is impossible to bring the results to a com-
mon denominator. Therefore, the choice of
methods for detecting the connection between
polymorphisms with AH, the features of the
studied groups, as well as the effect of hidden
causes that determine the levels of BP and
diagnosis of AH may be decisive in the find-
ings of the study.
The results showing the contingency of the
allele D with the presence of abdominal obe-
sity were obtained. The relationship between
abdominal obesity and the diagnosis of AH
was of linear symmetric and mean strength.
Thus, one can judge common genetic compo-
nent in the implementation of hypertensive
disease and abdominal obesity [22].
Interesting data on the association of poly-
morphism of the ACE gene with endothelial
dysfunction, as well as the processes of vas-
cular wall remodeling and atherogenesis are
available. An increase in the activity of the
local endothelial ACE is associated with a
disturbed endothelium-dependent vasodilata-
tion on acetylcholine in the hereditary AH of
337
Polymorphism of the renin-angiotensin system genes and endothelial no-synthase gene in obese patients with arterial hypertension
rats. This suggests that local hyperactivity of
RAS can lead to the endothelial dysfunction.
On this basis, the attempts were made to
link the endothelium dysfunction with the
genotype of ACE. F.Perticone studied vaso-
dilation of the brachial artery in the patients
with HD and healthy individuals in response
to infusion of acetylcholine (endothelial-de-
pendent vasodilation) and sodium nitroprus-
side (endothelial-independent stimulus). At
the same time, in the group of people with
AH endothelial-dependent vasodilation was
significantly less in the patients with DD
genotype compared with the patients with
II + ID genotype. In this case, endothelial-
independent vasodilation in these groups of
patients did not differ significantly.Thus, the
patients with DD genotype showed a greater
degree of endothelial dysfunction, although
they did not differ from the patients with II
and ID genotypes in the level of BP, age,
parameters of daily BP monitoring. In the
group of healthy control such regularities
were not revealed.
Among numerous candidate-genes, the type
1 receptor gene to angiotensin II (AGTR1) also
attracts attention because it mediates not only
the vasoconstrictive action of angiotensin II,
but also the expression of growth factors, the
proliferation of smooth muscles, the release of
tissue activator inhibitor Plasminogen and a
number of other important effects [23].
Thus, the changes in expression or structure
of the angiotensin II receptor of type 1 due to
the polymorphism of its gene may lead to the
changes in the regulation of vascular tone or
proliferation of the elements of the vascular
wall, so the gene of the angiotensin II receptor
type 1 is considered as one of the candidate-
genes, associated with the pathology of the
cardiovascular system.
The gene encoding the 1st type angiotensin
II receptor (AGTR1) is located on chromo-
some 3 (3q24). The most actively studied is
polymorphism А1166C (rs5186, a SNP known
as +1166A/C or A1166C, is located in the 3’
untranslated region of the angiotensin II recep-
tor type 1 gene AGTR1), which leads to the
replacement of adenine (A) with cytosine (C)
in the 1166 position of the AGTR1 gene. B.
Bonardeaux et al. have proved that the muta-
tion precisely in the 1166th position of the
nucleotide sequence of the AGTR1 gene affects
the functional activity of the receptor type 1
of angiotensin II. Polymorphism of A1166C in
AGTR1 was associated with CHD, as well as
with myocardial infarction and the develop-
ment of AH [24].
There are interesting results of the study on
the pulse wave velocity propagation and eval-
uation of the stiffness of large arteries in peo-
ple with AH and healthy people, depending on
the genotype. The increased stiffness of the
aorta with high probability was associated with
the 1166CC genotype in people with AH.
Such a connection was not observed in
people with normal pressure. The multiple
regression analysis showed that the genotype
of the angiotensin II receptor type 1 is the
second after SBP level most important deter-
minant of aortic stiffness [25].
Equally important component of RAS is the
protein — angiotensinogen (AGT).
The AGT gene is localized in the first chro-
mosome (locus 1 q42-43). In 1992, H.
Jeunemaitre et al. for the first time confirmed
the correlation between the AGT gene poly-
morphism and AH among Europeans and
http://universal_ru_en.academic.ru/376111/pulse_wave_velocity
338
T. V. Ashcheulova, N. N. Gerasimchuk, G. V. Demydenko et al.
Americans. 15 variants of the AGT gene were
identified, but the association with the plasma
levels of AGT and hypertension was detected
only for both point mutations with the replace-
ment of threonine with methionine and me-
thionine with threonine in 174 and 235 gene
codons — T174M (rs 4762, which is com-
monly referred to in the literature as “T174M”
or “Thr174Met”; however, databases now in-
dicate that the amino acid that varies is #207
(not 174, as the protein is currently numbered)
and M235T (rs699, that is a SNP in the angio-
tensin AGT gene that encodes a functional
change ??. In most published works, the name
for this SNP is M235T, or perhaps Met235Thr,
however its amino acid 268 (not 235) that var-
ies based on the numbering in todays data-
bases. rs699 is also occasionally known as
C4072T. In any case, the rs699(C) allele en-
codes the threonine variant, which is associ-
ated with higher plasma angiotensin levels,
and ultimately higher blood pressure leading
to an increased risk for the hypertension as-
sociated disorders [17]), respectively, associ-
ated with the AGT activity levels of blood
plasma, with the content of AT II and, conse-
quently, with the risk of CVD. According to
the literature, the presence of a 174M allele of
the AGT gene is much more common in the
patients with CHD, with myocardial infarction
and LV hypertrophy [26]. In study on the
M235T polymorphism, it was found that vari-
ant 235T is an independent factor in the risk
of developing a heart attack, a risk factor for
CHD. At the same time, it was found that the
presence of one or two T-alleles led to a sub-
stantial increase in the level of AGT in plasma,
resulting in a higher content of angiotensin II.
It is a reason by which many authors explain
the association of this polymorphism with AH.
Sethi A. et al. conducted a meta-analysis, the
purpose of which was to study the association
of the AGT gene M235T polymorphism with
the concentration of angiotensinogen in blood
plasma, the level of systolic blood pressure
(SBP) and diastolic blood pressure (DBP), AH
and the risk of developing myocardial infarc-
tion and CHD. The study included three major
ethnic groups: representatives of the Caucasian,
Mongoloid and Negroid races. In representa-
tives of Caucasian races an increase in the
concentration of AGT in plasma by 5 % in MT
heterozygotes and by 11 % in homozygotes in
the 235T allele was noted compared with the
carriers of MM genotype. The M235T poly-
morphism of the AGT gene is associated with
the risk of developing AH in Caucasians and
indigenous people in Asia. However, in all
three ethnic groups, this polymorphism was
not associated with the risk of developing
myocardial infarction and CHD [27].
Additionally, according to other studies,
there is a correlation between the TT genotype
of the M235T polymorphism of the AGT gene
with a higher probability of development of AH,
higher levels of BP and of concentration of ACE
[28]. In another study of the M235T polymor-
phism it was demonstrated that the presence of
one or two T-alleles is accompanied by a sig-
nificant increase in the level of AT II, which in
turn, is able to trigger a cascade of inflamma-
tory reactions, leading to various disorders.
There is also an evidence of a correlation
between the frequency of T/M allele of the
M235T polymorphism of the AGT gene in
hypertensive patients, which is 0.73/0.27. That
is, the frequency of T-allele is almost twice
higher in the patients suffering from AH [29].
https://www.snpedia.com/index.php/Hypertension
339
Polymorphism of the renin-angiotensin system genes and endothelial no-synthase gene in obese patients with arterial hypertension
The M235T polymorphism of the AGT gene
can promote the activation of immune inflam-
mation in the patients with AH. Thus, it was
demonstrated that AH occurs and deepens in
the individuals who are carriers of the gene
of the T-allele of the M235T polymorphism of
the AGT gene when the cytokine-interleu-
kine-1 (IL-1) and TNF-α concentrations are
elevated. A high level, in particular IL-1, can
promote inflammation, higher expression of
AGT, and vasoconstriction of vessels in the
patients with AH. That is, the M235T poly-
morphism of the AGT gene is a significant risk
factor and a hereditary marker of the AH de-
velopment [30].
Characteristics of endothelial nitric
oxide synthase gene polymorphisms
of G894T, T-786C and 4th intron
At present, a significant amount of data on the
association of polymorphisms of the eNOS
gene with various diseases, including CVD,
has been accumulated.
NO of endothelial origin is an important
atheroprotector mediator, and the disorder of
the regulation of its synthesis is associated
with an increased risk of CVD. Hypertension
develops in the NOS mouse line, and athero-
sclerosis develops in the line combining the
absence of a functioning apolipoprotein E gene
and the NOS gene (NOS3 is also known as
eNOS) in the genome. Therefore, the pro-
cesses of regulation of the synthesis of NO and
the gene encoding the NOS, are the first can-
didates in the study of endothelial dysfunction
of blood vessels and a number of CVD [31].
Among the genes encoding NOS, the most
likely candidate for the development of CVD
is precisely the NOS3 gene.
The eNOS enzyme and NOS3 gene were
described in 1992–1993. The gene encoding
the eNOS is located on the chromosome 7q35-
36 and consists of 26 exons [32]. The eNOS
gene promoter contains several domains, i.e.
it can be controlled by a number of transcrip-
tion factors [33]. To date, the polymorphism
of the eNOS gene in 11 locations has been
described, 8 of which were studied as possible
risk factors for CVD [34]. The most studied
are the 4a/b polymorphism of 4th intron
(27-bp-VNTR), the G894T (Glu298Asp)
(rs1799983) polymorphism of the 7th exon and
the T-786C (rs2070744) polymorphism of the
eNOS gene promoter [35,36]. Fig.1.
The DNA region of the NOS3 gene, in
which guanine (G) is replaced by thymine (T)
in position 894, is called the genetic marker
G894T. As a result of such a substitution, the
properties of the protein are transformed, be-
cause in its amino acid sequence the glutamic
amino acid at position 298 is replaced by as-
paraginic acid (Glu298Asp). The possible
genotypes are G/G; T/T; G/T. A number of
studies have shown that the people with geno-
type T/T have a higher risk of coronary heart
disease (CHD), myocardial infarction and isch-
emic stroke. This is especially true in modern
life, when the cardiovascular system of a per-
son is constantly subjected to various stresses.
On the background of the genetic predisposi-
tion to CVD (the presence of allele T on SNP
G894T of the NOS3 gene in the genotype) a
probability of the pathology development in-
creases. The T-allele carriers (T/T and G/T
genotypes) are more common in pregnant
women who suffer from hypertension and
placental abruption, compared to the group of
women without these complications of preg-
340
T. V. Ashcheulova, N. N. Gerasimchuk, G. V. Demydenko et al.
nancy. Thus, the presence of T-allele is a po-
tential independent factor that increases the
risk of developing hypertension in pregnan-
cy [37].
The literature presents contradictory infor-
mation on the relationship between the alleles
of the polymorphism G894T and the content
of NO in the blood. So, according to Dias R.G.
et al [38], the TT genotype of G894T polymor-
phism causes an increase in the proteolytic
activity in endothelial cells, leading to a de-
crease in the levels of functional eNOS and
nitric oxide, and Sakar M. N. et al. [39] showed
that the individuals with the TT genotype have
statistically significantly lower NO level com-
pared to the subjects with GG or GT genotypes
(p < 0.05). At the same time, Mackawy A.M.
et al [40] found that the allele T of G894T
polymorphism is associated with elevated lev-
els of nitrates in plasma: the content of plasma
nitrates in the individuals with genotypes GG,
GT and TT was 9.92 ± 1.65; 12.11 ± 1.04;
14.55 ± 2.18 mmol/ml, respectively. In this
regard, additional studies with a large number
of subjects are needed to clarify this issue.
It is proved that the modification of the
eNOS gene polymorphism is associated with
the oxidative stress [41]. The role of gene poly-
morphism, in particular NOS3 (Glu298Asp),
and end-product of glycosylation in the dif-
ferential response of cells to hyperglycemia has
been studied. It is shown that the presence of
this genotype contributes to the development
of endothelial-dependent vascular complica-
tions [42]. Several authors found that the
G894T polymorphism of the NOS3 gene is a
risk factor for coronary atherosclerosis and HD.
At the same time, there may be a connection
between the allele G of Glu298Asp polymor-
phism and the age of individuals with AH [43].
It has been shown that the polymorphism of
eNOS — Glu298Asp (rs1799983) is associated
with the BP levels in adolescents [44]. Besides,
numerous studies have found that the endothe-
lium dependent vasodilatation in the presence
of the 298Asp (894T) allele is damaged, and
this type of polymorphism is connected with
CHD and hypertension.
Thus, it has been established that G894T
polymorphism is associated with an increased
carotid intimal medial thickness in the right
carotid artery [45]. The association of the TT
genotype with angina pectoris (odds ratio
(OR) = 10.2; 95 % confidence interval
Fig. 1. Polymorphism of the endothelial NO gene of synthase (eNOS)
341
Polymorphism of the renin-angiotensin system genes and endothelial no-synthase gene in obese patients with arterial hypertension
(CI) = 1.51–68.8; P = 0.025) was found; in
turn, the highest frequency of genotype GT
occurrence was revealed in the individuals,
who had relatives with coronary artery dis-
ease [46].
An analysis of literary sources on the data-
bases of Medline, Embase and Wangfang by
January 1, 2013 with the participation of 8547
patients and 9117 persons in the control group,
showed that the genotype TT of G894T poly-
morphism is highly associated with the risk of
developing ischemic stroke compared with the
genotype of the allele G (OR = 1.25, 95 %
CI = 1.09 -1.42, P < 0.001), which is more
relevant for the Asian race than for the
Caucasian race [47]. A meta-regression analy-
sis devoted to the establishment of associations
between HD and the polymorphic variant of
G894T in the Han ethnic group (China) showed
a positive relationship (OR = 1.32, P < 0.001),
whereas geographic differences were identified
in the relationship between G894T and predis-
position to this disease. Thus, among the resi-
dents of the southern regions of China the
indicated polymorphism may be related to HD
(OR = 1.59, P < 0.001), whereas in the north-
ern regions such association is not observed
(OR = 1.16, P = 0.12) [48].
In the individuals suffering from excessive
body weight, the T allele of the G894T poly-
morphism of the NOS3 gene increases the risk
of hypertension development [49]. There was
established an increased risk of developing
obesity in the presence of the TT G894T gen-
otype (OR = 2.62, P = 0.04), whereas the
gender analysis shows that in men with over-
weight this genotype is found much more often
compared to the control group (9.9 % versus
2.9 %, P = 0.01) [50].
Moreover, the authors investigated the re-
lationship between the main effector of the
renin-angiotensin system AT II and allelic
polymorphism G894T of the eNOS gene. It has
been established that this type of polymor-
phism determines the systemic and renal he-
modynamic response to AT II. This effect is
more pronounced in men than in women [51].
In this regard it is of scientific and practical
interest to study the combined effect of the
common polymorphism on the insertion/dele-
tion of the ACE gene and the allele 894T of
the eNOS gene on the development of endo-
thelial dysfunction, hypertension, atheroscle-
rosis, and nephropathyis.
One of the most studied variants of the
eNOS polymorphism is tandem repeats in the
intron 4 (4a/b) (rs869109213. In intron 4 of
this gene minisatellite eNOS 4a/4b is located,
which has two alleles, consisting of 4 or 5
tandem repeats in size of 27 pairs of nucleo-
tides. The normal version contains 5 repeats
(denoted as 4b), the mutant variant contains 4
repeats (denoted as 4a).
The variants of polymorphism: 4b/4b —
normal variant of polymorphism in a homozy-
gous form; 4b/4a — heterozygous form of
polymorphism; 4a/4a — mutant variant of
polymorphism associated with the increased
risk of disease in a homozygous form.
The effect of variant 4a is associated with
a disorder of the expression of the NOS3 gene,
which leads to a decrease in the NO produc-
tion. For this variant, the associations with
atherosclerosis, CHD and myocardial infarc-
tion are described. In the patients with type 2
diabetes, the presence of option 4a is a risk
factor for hypertension. In 2004 S.Fatini et al.
showed a connection between the genotype 4a
342
T. V. Ashcheulova, N. N. Gerasimchuk, G. V. Demydenko et al.
/ 4a and the onset of acute coronary syndrome,
in particular with an acute myocardial infarc-
tion [52]. Additionally, in 2012, Chinese sci-
entists in the meta-analysis of American pa-
tients have linked the 4a/4a genotype with an
increased risk of ischemic stroke [53].
Most authors have shown that the presence
of allele C in position 786 of the promoter of
the eNOS gene results in a decrease in its activ-
ity by 52 ± 11 %, and the resulting lack of
eNOS is responsible for a decrease in the syn-
thesis and release of nitric oxide and endothe-
lial dysfunction [54]. In the people with path-
ological genotype of the promoter of the eNOS
gene (CC and TC) it was observed an increase
in the tone of coronary arteries, increased pro-
pensity to coronar spasm and perverted coro-
nary artery reaction to the introduction of ace-
tylcholine, which can serve as the basis for the
development of coronary heart disease (CHD)
and HD [55]. It was shown that the polymor-
phism of -786T > C promoter is associated
with an increased risk of restenosis after the
stenting of coronary arteries [56].
When screening the population to determine
the prevalence of -786T > C (rs2070744) poly-
morphism in the 5’- untranslated region of the
gene eNOS and its association with pathology,
it was found that homozygotes -786C are more
common among the patients with atheroscle-
rosis of the coronary arteries than in the control
group (24.6 % versus 14.5 %). The risk of the
pathology development was higher in the ho-
mozygote CC compared with the homozygotes
TT [57].
The association of polymorphism -786T > C
with the type of vascular reaction to the load
was also found among juvenile Caucasian race.
In boys (168 persons) with a hypertensive
response to the load the genotype of CC was
found 3.5 times more often. Such CC homo-
zygotes are characterized by a higher periph-
eral vascular tone and an imbalance of produc-
tion of major vasoactive endothelial factors,
which is manifested in elevated endothelin-1.
It is typical that hypertonic vascular responses
to load are noted in the individuals with a
failure of regulatory mechanisms of supporting
the vascular tone, as well as in those with HD
and pre-hypertension [58].
Noteworthy, this study focused on the per-
sons with for the moment compensated state
of vascular factors, the imbalance of which is
revealed only with certain tests. Distinguishing
such a group with a hidden pathology of CVD
and defining the NOS3 gene polymorphism in
it would help to study the implementation of
a particular allele in the phenotype.
Meta-analysis of Casas et al. showed that
the mutation –786T > C in the promoter region
of the eNOS gene affects the level of gene
expression. A low level of the mRNA of the
eNOS gene as well as a low serum nitrate/ni-
trite level are noted in the individuals with the
variant –786C [59].
In Canada, 705 middle-aged men without
CHD in their history were involved in the
study of M.E. Hyndman et al. [60]. The ratio
of different variants of the genotype (TT, TC,
and CC) of the promoter of the eNOS gene was
close to that of the Caucasians and was dis-
tributed respectively 38.9; 46.1 and 15.0 %.
The persons with CC genotype had markedly
higher levels of SBP and were more often
diagnosed with AH which allowed the authors
to conclude that the CC genotype of eNOS
gene promoter is a risk factor in the develop-
ment of AH.
343
Polymorphism of the renin-angiotensin system genes and endothelial no-synthase gene in obese patients with arterial hypertension
In 2013, the data on the association of eNOS
gene polymorphisms 4b/4a, T-786C and G894T
with metabolic syndrome (MS) have been pub-
lished. The study included 339 patients with
MS and 783 patients without MS who were
treated at the Central Taiwanese Hospital. The
variant ТС+СС on T-786C SNP of the eNOS
gene was significantly associated with a de-
crease in the risk of MS (OR = 0.63). Intron
4b/ 4a genotype of intron 4 27bp repeat poly-
morphism of the eNOS gene is also associated
with a decrease in the risk of MS (OR = 0.68).
Additionally, the authors have shown that the
presence of the G894T genotype in obese sub-
jects plays a significant role in comparison with
the control group (OR = 1.65) [61]. J. Bressler,
J.S. Pankow, J. Coresh, E. Boerwinkle analyzed
the polymorphism of the eNOS gene (G894T)
and obesity as a risk determinant for AH, DM
type 2 in 14,374 participants from the United
States in the framework of a joint study in
2013. Among the participants there were 728
patients with DM type 2 (African-Americans)
and 980 — of Caucasian race. The study shows
that the relationship between the indicated pa-
rameters is noted only in the individuals of the
Caucasian race [62].
Additionally it was noted that for the Italian
population two types of the eNOS gene poly-
morphisms are associated with significant an-
giographical changes. The scientists suggest
that the combination of two types of polymor-
phisms T786C and Glu298Asp in one genome
is associated with a high risk of developing
CHD and HD compared to one type [63]. Thus,
this study demonstrates the importance of iden-
tifying not a single polymorphism, but their
combination to distinguish the risk groups in
CHD and HD.
A four-SNP haplotype, comprising an un-
common variant rs11699009 in the BPIFB4
gene, has been associated with notable longe-
vity. In the study of Vecchione et al. [64], 416
individuals were genotyped to determine their
haplotypes. The authors demonstrated that the
overexpression of the BPIFB4 uncommon
variant in mice impaired eNOS signaling and
increased BP, opening the way for the develop-
ment of new therapeutic strategies.Тhe present
study demonstrates that the expression of a
rare variant of BPIFB4 — a protein we have
previously associated with improved aging
when present in its longevity-associated iso-
form — leads to the maintenance of high blood
pressure in the face of treatment of hyperten-
sion.
Noteworthy, a number of studies did not
reveal the relationship between the polymor-
phism of the NOS3 gene and the development
of CVD, which may be due to the small sam-
ple size in these studies or ethnicity etc.
Data from Next-Generation
Sequencing technology
at hypertension with obesity
The cause of a complex trait, like essential
hypertension, remains elusive if examined in
the light of the GWAS results. Data from NGS
technology offer the possibility to capture a
greater range of the single nucleotide variabil-
ity compared to GWAS.
Genetic variants associated with hyperten-
sion, obesity and diabetes based on PolyPhen2
and SIFT algorithmic predictors of mutation
pathogenicity were analyzed on the complete
exome of 60 people of Kazakh nationality us-
ing the technology of Next-Generation
Sequencing (NGS) HiSeq2000.
344
T. V. Ashcheulova, N. N. Gerasimchuk, G. V. Demydenko et al.
Seven genetic variants were detected in
GHRL (rs4684677), MTHFR (rs1801133),
OPRM1 (rs1799971), ERBB2 (rs1058808),
BDNF (rs6265), PNPLA3 (rs738409), MTRR
(rs1801394) genes [65].
The group of Kim et al. [66] interrogated
135 Exome Chip SNVs for associations with
ten cardiometabolic traits in 14,028 Korean
individuals. Three associations were observed
with one or more of four cardio-metabolic
traits (fasting plasma glucose (FPG), waist-hip
ratio (WHR), Systolic Blood Pressure (SBP),
Diastolic Blood Pressure (DBP),) within the
genes BRAP, ACAD10 and ALDH2 in the
12q24.12 region. The pleiotropic effect of
region 12q24.12 was identified for three SNPs
(rs3782886 on BRAP, rs11066015 on ACAD10
and rs671 on ALDH2) on lipids and other
cardio-metabolic traits. The locus was also
associated with High-Density Lipoprotein
(HDL), Low-Density Lipoprotein (LDL), tri-
glycerides (p < 1.06 × 10−2 ; effect sizes be-
tween −7.60 ± 1.72 and 2.55 ± 0.53) [66].
Conclusions
The study on the polymorphism of the renin-
angiotensin system genes and the endothelial
synthase nitrogen oxide gene is of great prac-
tical importance, since it not only provides an
opportunity to predict the complications of
hypertension disease but is also the basis for
obtaining the expression of positive gene com-
binations.Thus, the analysis of literature data
suggests that identified genotype-phenotype
associations and corresponding functional
changes in the endothelium can give informa-
tion about the possibilities of priority and op-
timal therapeutic effects in each case, will
enable optimization of the diagnosis of disor-
ders in patients with combined pathology —
hypertension and obesity, at the early stages.
The advent of Next-Generation Sequencing
provided the opportunity to detect, in a high-
throughput way, the entire spectrum of ge-
nomic variation ranging from rare to common
variants and from Single Nucleotide
Polymorphism to insertions, deletions.
However, the analysis of works on this sub-
ject showed that in studying the association of
the polymorphism of the renin-angiotensin
system genes and the endothelial synthase ni-
trogen oxide gene with the development of
cardiovascular diseases, namely, hypertension
with obesity, one must take into account both
the ethnic belonging of the subjects and a com-
position of polymorphous variants, and their
combinations in the sample of a larger size.
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Поліморфізм генів ренін-ангіотензинової
системи та гена ендотеліальної no-синтази у
хворих на артеріальну гіпертензію з ожирінням
Т. В. Ащеулова, Н. М. Герасимчук,
Г. В. Демиденко, М. В. Кулікова
У статті представлений клінічно встановлений
взаємозв’язок підвищеного артеріального тиску зі збіль-
шенням маси тіла. Показано, що ендотеліальна дис-
функція і дисбаланс нейро-гуморальних систем, а саме
патологічне підвищення активності ренін-ангіотензи-
нової системи, виступають провідними механізмами
патогенезу гіпертонічної хвороби в поєднанні з ожи-
рінням. Даний огляд літератури присвячений інтер-
претації наукових досліджень в області поліморфізму
генів ренін ангіотензинової сиcтеми і гена ендотеліаль-
ної синтази оксиду азоту. Складність полягає в пра-
вильній оцінці асоціацій алелей, які мають клінічне
значення. Особливо важливо завжди точно визначати
асоціації поліморфізму генів при гіпертонічній хворо-
бі з ожирінням. Інформація про подібні асоціації і
зв’язки надає можливість для пошуку нових тактик і
мішеней впливу, що розвиває персоніфіковані підходи
до терапії пацієнтів з даною комплексною патологією.
К л юч ов і с л ов а: ендотеліальна синтаза оксиду
азоту, ренін-ангітензінова система, поліморфізм генів,
гіпертонічна хвороба, ожиріння.
Полиморфизм генов ренин-ангиотензиновой
системы и гена эндотелиальной no-синтазы
у больных артериальной гипертензией
с ожирением
Т. В. Ащеулова, Н. Н. Герасимчук,
А. В. Демиденко, М. В. Куликова
В статье представлены данные о взаимосвязи повы-
шения уровня артериального давления и увеличения
349
Polymorphism of the renin-angiotensin system genes and endothelial no-synthase gene in obese patients with arterial hypertension
массы тела. Показано, что эндотелиальная дисфункция
и дисбаланс нейрогуморальных систем, а именно па-
тологическое повышение активности ренин-ангиотен-
зиновой системы выступают ведущими механизмами
патогенеза гипертонической болезни в сочетании с
ожирением. Данный обзор литературы посвящён ин-
терпретации научных изысканий в области полимор-
физма генов ренин ангиотензиновой сиcтемы и гена
эндотелиальной синтазы оксида азота. Трудность за-
ключается в правильной оценке ассоциаций аллелей,
которые имеют клиническое значение. Особенно важ-
но точное определение ассоциаций полиморфизма
генов при гипертонической болезни с ожирением.
Информация о подобных ассоциациях и связях предо-
ставляет возможности для поиска новых тактик и
мишеней для воздействия, что развивает персонифи-
цированные подходы к терапии пациентов с данной
комплексной патологией.
К л юч е в ы е с л ов а: эндотелиальная синтаза окси-
да азота, ренин-ангитензиновая система, полиморфизм
гена, гипертоническая болезнь, ожирение.
Receivwd 26.06.2018
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