High glucose shifts the oxylipin profiles in the astrocytes towards pro-inflammatory states

Hyperglycemia is associated with several complications in the brain, which are also characterized by inflammatory conditions. Astrocytes are responsible for glucose metabolism in the brain and are also important participants of inflammatory responses. Oxylipins are lipid mediators, derived from the metabolism of polyunsaturated fatty acids (PUFAs) and are generally considered to be a link between metabolic and inflammatory processes. High glucose exposure causes astrocyte dysregulation, but its effects on the metabolism of oxylipins are relatively unknown and therefore, constituted the focus of our work. We used normal glucose (NG, 5.5 mM) vs. high glucose (HG, 25 mM) feeding media in primary rat astrocytes-enriched cultures and measured the extracellular release of oxylipins (UPLC-MS/MS) in response to lipopolysaccharide (LPS). The sensitivity of HG and NG growing astrocytes in oxylipin synthesis for various serum concentrations was also tested. Our data reveal shifts towards pro-inflammatory states in HG non-stimulated cells: an increase in the amounts of free PUFAs, including arachidonic (AA), docosahexaenoic (DHA) and eicosapentaenoic (EPA) acids, and cyclooxygenase (COX) mediated metabolites. Astrocytes cultivated in HG showed a tolerance to the LPS, and an imbalance between inflammatory cytokine (IL-6) and oxylipins release. These results suggest a regulation of COX-mediated oxylipin synthesis in astrocytes as a potential new target in treating brain impairment associated with hyperglycemia. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Авторы
Chistyakov D.V. 1 , Goriainov S.V. 2 , Astakhova A.A.1 , Sergeeva M.G. 1
Журнал
Издательство
MDPI AG
Номер выпуска
5
Язык
Английский
Статус
Опубликовано
Номер
311
Том
11
Год
2021
Организации
  • 1 Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, 119992, Russian Federation
  • 2 SREC PFUR Peoples’ Friendship University of Russia (RUDN University), Moscow, 117198, Russian Federation
Ключевые слова
Astrocytes; Eicosanoids; High glucose; Inflammation; Interleukin 6 (IL-6); Oxylipins; Tolerance; Toll-like receptors (TLRs)
Дата создания
20.07.2021
Дата изменения
20.07.2021
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/74301/
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