Sensitivity to 4-hydroxyestradiol and dna repair efficiency in peripheral blood lymphocytes of endometrial cancer patients

Sensitivity to 4-hydroxyestradiol and dna repair efficiency in peripheral blood lymphocytes of endometrial cancer patients

Background: The development of hormone-dependent cancers, including endometrial carcinomas, in great part may be mediated by the genotoxic effects of estrogen metabolites, among which 4-hydroxyestradiol (4OHE2) is characterized by the most prominent DNA-damaging properties. It is assumed that the in...

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Datum:2018
Hauptverfasser: Buchynska, L.G., Brieieva, O.V.
Format: Artikel
Sprache:English
Veröffentlicht: Інститут експериментальної патології, онкології і радіобіології ім. Р.Є. Кавецького НАН України 2018
Schriftenreihe:Experimental Oncology
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Original contributions
Online Zugang:https://nasplib.isofts.kiev.ua/handle/123456789/139243
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Назва журналу:Digital Library of Periodicals of National Academy of Sciences of Ukraine
Zitieren:Sensitivity to 4-hydroxyestradiol and dna repair efficiency in peripheral blood lymphocytes of endometrial cancer patients / L.G. Buchynska, O.V. Brieieva // Experimental Oncology. — 2018 — Т. 40, № 1. — С. 68–72. — Бібліогр.: 28 назв. — англ.

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spelling nasplib_isofts_kiev_ua-123456789-1392432025-02-09T22:15:54Z Sensitivity to 4-hydroxyestradiol and dna repair efficiency in peripheral blood lymphocytes of endometrial cancer patients Buchynska, L.G. Brieieva, O.V. Original contributions Background: The development of hormone-dependent cancers, including endometrial carcinomas, in great part may be mediated by the genotoxic effects of estrogen metabolites, among which 4-hydroxyestradiol (4OHE2) is characterized by the most prominent DNA-damaging properties. It is assumed that the individual sensitivity to the 4OHE2 may determine the predisposition to endometrial cancer (EС). Aim: To analyze the sensitivity of peripheral blood lymphocytes (PBLs) of EC patients to the 4OHE2 and to evaluate the repair efficiency of 4OHE2-induced DNA damage. Materials and Methods: The study was performed on the PBLs of 53 EC patients and 20 healthy women. The level of DNA damage was measured using the comet assay and was expressed as % tail DNA. The DNA repair efficiency (%) was evaluated by determining the ratio between the amount of repaired DNA damage and the level of 4OHE2-induced damage that appeared after incubation of PBLs with 4OHE2. Results: In PBLs of EC patients, a higher level of 4OHE2-induced DNA damage (32.0 ± 2.2% tail DNA) and lower DNA repair efficiency (34.0 ± 4.5%) was observed compared to PBLs of healthy women (22.3 ± 2.3% tail DNA and 48.8 ± 4.5%, respectively). PBLs of EC patients with deep tumor invasion of myometrium were characterized by more prominent decrease of DNA repair than those with less invasive tumor (< ½ of myometrium) (20.9 ± 7.8 and 43.7 ± 6.7%, respectively). Furthermore, lower DNA repair efficiency was detected in the PBLs of EC patients with a family history of cancer compared to this parameter in patients with sporadic tumors (20.9±7.8 and 47.1 ± 5.5%, respectively). Conclusion: The PBLs of EC patients are characterized by increased sensitivity to the genotoxic effect of 4OHE2 and reduced repair efficiency regarding 4OHE2-induced DNA damage. A lower level of DNA repair is observed in EC patients with deep tumor myometrial invasion and a family history of cancer. 2018 Article Sensitivity to 4-hydroxyestradiol and dna repair efficiency in peripheral blood lymphocytes of endometrial cancer patients / L.G. Buchynska, O.V. Brieieva // Experimental Oncology. — 2018 — Т. 40, № 1. — С. 68–72. — Бібліогр.: 28 назв. — англ. 1812-9269 https://nasplib.isofts.kiev.ua/handle/123456789/139243 en Experimental Oncology application/pdf Інститут експериментальної патології, онкології і радіобіології ім. Р.Є. Кавецького НАН України
institution Digital Library of Periodicals of National Academy of Sciences of Ukraine
collection DSpace DC
language English
topic Original contributions
Original contributions
spellingShingle Original contributions
Original contributions
Buchynska, L.G.
Brieieva, O.V.
Sensitivity to 4-hydroxyestradiol and dna repair efficiency in peripheral blood lymphocytes of endometrial cancer patients
Experimental Oncology
description Background: The development of hormone-dependent cancers, including endometrial carcinomas, in great part may be mediated by the genotoxic effects of estrogen metabolites, among which 4-hydroxyestradiol (4OHE2) is characterized by the most prominent DNA-damaging properties. It is assumed that the individual sensitivity to the 4OHE2 may determine the predisposition to endometrial cancer (EС). Aim: To analyze the sensitivity of peripheral blood lymphocytes (PBLs) of EC patients to the 4OHE2 and to evaluate the repair efficiency of 4OHE2-induced DNA damage. Materials and Methods: The study was performed on the PBLs of 53 EC patients and 20 healthy women. The level of DNA damage was measured using the comet assay and was expressed as % tail DNA. The DNA repair efficiency (%) was evaluated by determining the ratio between the amount of repaired DNA damage and the level of 4OHE2-induced damage that appeared after incubation of PBLs with 4OHE2. Results: In PBLs of EC patients, a higher level of 4OHE2-induced DNA damage (32.0 ± 2.2% tail DNA) and lower DNA repair efficiency (34.0 ± 4.5%) was observed compared to PBLs of healthy women (22.3 ± 2.3% tail DNA and 48.8 ± 4.5%, respectively). PBLs of EC patients with deep tumor invasion of myometrium were characterized by more prominent decrease of DNA repair than those with less invasive tumor (< ½ of myometrium) (20.9 ± 7.8 and 43.7 ± 6.7%, respectively). Furthermore, lower DNA repair efficiency was detected in the PBLs of EC patients with a family history of cancer compared to this parameter in patients with sporadic tumors (20.9±7.8 and 47.1 ± 5.5%, respectively). Conclusion: The PBLs of EC patients are characterized by increased sensitivity to the genotoxic effect of 4OHE2 and reduced repair efficiency regarding 4OHE2-induced DNA damage. A lower level of DNA repair is observed in EC patients with deep tumor myometrial invasion and a family history of cancer.
format Article
author Buchynska, L.G.
Brieieva, O.V.
author_facet Buchynska, L.G.
Brieieva, O.V.
author_sort Buchynska, L.G.
title Sensitivity to 4-hydroxyestradiol and dna repair efficiency in peripheral blood lymphocytes of endometrial cancer patients
title_short Sensitivity to 4-hydroxyestradiol and dna repair efficiency in peripheral blood lymphocytes of endometrial cancer patients
title_full Sensitivity to 4-hydroxyestradiol and dna repair efficiency in peripheral blood lymphocytes of endometrial cancer patients
title_fullStr Sensitivity to 4-hydroxyestradiol and dna repair efficiency in peripheral blood lymphocytes of endometrial cancer patients
title_full_unstemmed Sensitivity to 4-hydroxyestradiol and dna repair efficiency in peripheral blood lymphocytes of endometrial cancer patients
title_sort sensitivity to 4-hydroxyestradiol and dna repair efficiency in peripheral blood lymphocytes of endometrial cancer patients
publisher Інститут експериментальної патології, онкології і радіобіології ім. Р.Є. Кавецького НАН України
publishDate 2018
topic_facet Original contributions
url https://nasplib.isofts.kiev.ua/handle/123456789/139243
citation_txt Sensitivity to 4-hydroxyestradiol and dna repair efficiency in peripheral blood lymphocytes of endometrial cancer patients / L.G. Buchynska, O.V. Brieieva // Experimental Oncology. — 2018 — Т. 40, № 1. — С. 68–72. — Бібліогр.: 28 назв. — англ.
series Experimental Oncology
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