Чувствительность трансмембранного потенциала митохондрий гепатоцитов к регуляции фенилэфрином после экспозиции в растворах диметилсульфоксида и 1,2-пропандиола, а также замораживания-отогрева

• Main Authors: Malyukina, Margarita Yu., Kavok, Nataliya S., Borovoy, Igor A., Averchenko, Katerina A.
• Format: Article
• Language: English
• Published: Publishing House ‘Akademperiodyka’ of the National Academy of Sciences of Ukraine; Institute for Problems of Cryobiology and Cryomedicine 2012
• Subjects: заморожування-відігрівання; гепатоцити; диметилсульфоксид; 1; 2-пропандіол; зонд JC-1; мітохондрії
• Online Access: https://cryo.org.ua/journal/index.php/probl-cryobiol-cryomed/article/view/31

Intensity of JC-1 probe aggregates fluorescence and agonist-induced changes in mitochondria transmembrane potential of rat hepatocytes prior to and after freeze-thawing were assessed by single-cell microfluorimetry. It was shown that incubation of the cells in 10% dimethyl sulfoxide (DMSO) and 1,2-propanediol (1,2-PD) solutions within an hour and the following washing decreased the fluorescence of dye aggregates. After freeze-thawing of cells with the cryoprotectants (2-step freezing down to the temperature of liquid nitrogen, thawing and washing-out the cryoprotectants) the intensity of dye aggregates fluorescence decreased down to 83 ± 6% of control in case of DMSO, and in the case of 1,2-PD the index made less than 10%. Unlike the fresh cell suspension where the rise of aggregates fluorescence intensity by 30% was found in response to short-term stimulation with phenylephrine (10-5 M) the hepatocyte suspension incubated in DMSO solution showed no response. After freeze-thawing of cells we revealed a partial recovery of their sensitivity to the hormone effect, but the response was recorded only after increasing the hormone concentration up to 10-4 M. Probl Cryobiol Cryomed 2013; 23(2):143-151.