Актуальность. Адипонектин (АН) - протективный адипоцитокин, продуцируемый жировой тканью и циркулирующий в крови в виде различных изомеров. При абдоминальном ожирении (АО) сниженная концентрация АН ассоциируется с развитием метаболи- ческого синдрома (МС), его отдельных компонентов и различных сердечно-сосудистых заболеваний. АН кодируется геном ADIPOQ . Показано, что генетические варианты ADIPOQ ассоциированы с изменением концентрации АН сыворотки крови.Цель исследования. Выявить ассоциации полиморфных вариантов T(+45)G rs2441766 и С(-11377)G rs 266729 гена ADIPOQ с кон- центрацией АН сыворотки крови, АО и МС у женщин.Результаты. Обследованы 302 женщины с АО в возрасте от 30 до 55 лет. Группу сравнения составила 161 практически здоровая женщина без АО. У 185 обследованных с АО был диагностирован МС в соответствии с критериями Международной федерации диа- бета (IDF, 2005). Частоты генотипов и аллелей вариантов T(+45)G и С(-11377)G гена ADIPOQ у женщин с АО и без АО не различались (р>0,05). Среди женщин с АО и МС реже встречались носители аллеля G варианта T(+45)G гена ADIPOQ , чем среди женщин с АО без МС (р<0,05). Частоты генотипов и аллелей варианта С(-11377)G гена ADIPOQ у женщин с АО и МС и у пациенток с АО без МС не разли- чались (р>0,05). У женщин с АО - носителей аллеля G варианта T(+45)G гена ADIPOQ концентрация высокомолекулярного АН (ВМАН) была выше, чем у носителей генотипа TТ этого гена. При анализе частот гаплотипов вариантов T(+45)G и С(-11377)G гена ADIPOQ в обследованных группах достоверных различий не выявлено (р>0,05). Концентрации общего АН в сыворотке крови у женщин с АО и МС - носителей различных генотипов и гаплотипов вариантов T(+45)G и С(-11377)G гена ADIPOQ не различались (р>0,05). Концен- трация ВМАН у женщин с АО - носителей гаплотипа TGC(X) (Х - аллель С или G варианта С(-11377)G ) была выше, чем у женщин с АО - носителей других гаплотипов гена ADIPOQ (р<0,05).Выводы. Носительство аллеля G варианта T(+45)G гена ADIPOQ является протективным в отношении МС у женщин с АО. У женщин с АО - носителей аллеля G концентрация ВМАН выше, чем у женщин с АО - носителей TT генотипа варианта T(+45)G гена ADIPOQ . Background. Adiponectin (AN) - a protective adipocytokine, produced by fat tissue and circulating in the form of various isomers in the blood. With obesity, a decreased level of AN is associated with the development of metabolic syndrome (MS) and various cardiovascular diseases. Regulation of its level can be caused by genetic factors, including single nucleotide polymorphism T(+45)G and C(-11377)G of the ADIPOQ gene. Allelic variants of the ADIPOQ gene was associated with AN concentrarion in blood.Objective. To identify the association of genetic variants of ADIPOQ with adiponectin level, AO and MS in women.Results. A total of 302 women with abdominal obesity (AO) aged 30-55 years were examined. The comparison group consisted of 161 practically healthy women without AO. 185 patients with AO had MS according to the criteria of the International Diabetes Federation (IDF, 2005). The frequencies of genotypes and alleles of variants T (+45) G and C (-11377) G of the ADIPOQ gene among women with and without AO did not differ (p> 0,05). Among women with AO and MS, carriers of G allele variant T (+45) G of the ADIPOQ gene were less common than among women with AO without MS (р<0,05). The frequencies of genotypes and alleles of variant C (-11377) G of the ADIPOQ gene did not differ in women with AO and MS and in patients with AO without MS (p> 0.05). In women with AO - carriers of the G allele variant T (+45) G of the ADIPOQ gene, the concentration of high molecular weight AN (HMWA) was higher than that of the TT carriers of the genotype of this gene The haplotypes of the T (+45) G and C (-11377) G variants of the ADIPOQ gene did not differ in the studied groups (p> 0,05). The con- centration of total AN in the serum of women with AO and MS - carriers of different genotypes and haplotypes of variants T (+45) G and C (-11377) G of the ADIPOQ gene did not differ (p> 0,05). The concentration of HMWA in women with AO - carriers of the TGC(X) haplotype (X - allele C or G variant C (-11377) G) was higher than in women with AO - carriers of other haplotypes of the ADIPOQ gene (p <0,05). Coclusions. G allele of the T(+45)G variant the ADIPOQ gene is protective against MS in women with AO. In women with AO - carriers of the G allele, the concentration of HMWA is higher than in women with AO - carriers of the TT genotype of variant T(+45)G of the ADIPOQ gene.
Extracellular vesicles (EVs) are cell-derived membrane vesicles which play an important role in cell-to-cell communication and physiology. EVs deliver biological information from producing to recipient cells by transport of different cargo such as proteins, mRNAs, microRNAs, non-coding RNAs and lipids. Adipose tissue EVs could regulate metabolic and inflammatory interactions inside adipose tissue depots as well as distal tissues. Thus, adipose tissue EVs are assumed to be implicated in obesity-associated pathologies, notably in insulin resistance and type 2 diabetes mellitus (T2DM). In this study we for the first time characterize EVs secreted by visceral (VAT) and subcutaneous adipose tissue (SAT) of patients with obesity and T2DM with standard methods as well as analyze their morphology with cryo-electron microscopy. Cryo-electron microscopy allowed us to visualize heterogeneous population of EVs of various size and morphology including single EVs and EVs with internal membrane structures in samples from obese patients as well from the control group. Single vesicles prevailed (up to 85% for SAT, up to 75% for VAT) and higher proportion of EVs with internal membrane structures compared to SAT was typical for VAT. Decreased size of single and double SAT EVs compared to VAT EVs, large proportion of multilayered EVs and all EVs with internal membrane structures secreted by VAT distinguished obese patients with/without T2DM from the control group. These findings could support the idea of modified biogenesis of EVs during obesity and T2DM.
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