随着年龄的增长,脂肪组织中OCT3表达的增加:对女性中catecholamine和脂质周转以及胰岛素抵抗的影响
Fozia Ahmed1, Milica Vranic1, Susanne Hetty1
1Department of Medical Sciences, Clinical Diabetology and Metabolism, Uppsala University, 751 85 Uppsala, Sweden.
Endocrinology
|November 16, 2023
概括
随着年龄的增长,女性脂肪组织中的有机阴离子转运体3 (OCT3) 水平增加,可能会恶化胰岛素抵抗. 较高的OCT3可能会减少脂肪分解,导致与年龄相关的脂肪.
科学领域:
- 内分泌学 在内分泌学.
- 代谢过程中的代谢.
- 分子生物学分子生物学
背景情况:
- 衰老与catecholamine刺激的脂解减少有关,可能导致脂肪和胰岛素抵抗.
- 有机阴离子转运体3 (OCT3) 调解了catecholamine的转运到脂肪细胞中,其由雌二醇 (E2) 的抑制影响了脂解.
- 对于OCT3在女性与年龄相关的代谢变化中的作用,需要进一步研究.
研究的目的:
- 研究皮下脂肪组织 (SAT) 中的OCT3mRNA水平与女性的衰老和胰岛素抵抗标志物的相关性.
- 检查雌二醇 (E2) 对SAT中OCT3mRNA水平的影响.
- 评估OCT3单核酸多态 (SNP) 和与糖尿病相关的特征之间的关系.
主要方法:
- 皮下脂肪组织 (SAT) 活检从66名患有或没有2型糖尿病的女性 (年龄22-76岁) 中收集.
- 量化了OCT3mRNA和蛋白质水平,并与衰老,胰岛素抵抗标志物和活体脂解相关联.
- SAT与E2进行化,以评估其对OCT3mRNA水平的影响,并分析OCT3SNP与代谢特征的关联.
主要成果:
- 在SAT中,OCT3mRNA和蛋白质水平随着年龄的增长而增加,并且在绝经后的女性中与绝经前的女性相比更高.
- 雌激素 (E2) 治疗剂量依赖性降低了SAT中的OCT3mRNA水平.
- OCT3 mRNA水平与胰岛素耐药性标志物和活体脂解有负相关性,而OCT3 SNPs与BMI,腰比和甘油三水平相关.
结论:
- 随着年龄的增长,SAT中的OCT3mRNA和蛋白质水平增加,与女性的胰岛素抵抗标志物相反相关.
- 雌激醇 (E2) 降低了OCT3mRNA的调节,这可能解释了绝经前妇女的较低水平.
- 脂肪组织中OCT3的升高可能会增加catecholamine的降解,有助于降低脂解和随着衰老增加脂肪.
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