Symbiosis School of Biological Sciences (SSBS), Symbiosis International (Deemed University) (SIU), Lavale, Pune, Maharashtra, India.
Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, USA.
Biochem Pharmacol. 2024 Nov;229:116513. doi: 10.1016/j.bcp.2024.116513. Epub 2024 Aug 30.
The transcription factor known as sterol regulatory element-binding protein (SREBP) and the glycation pathways, specifically the formation of Advanced Glycation End Products (AGEs), have a significant and deleterious impact on the kidney. They alter renal lipid metabolism and promote glomerulosclerosis, mesangial cell expansion, tubulointerstitial fibrosis, and inflammation, leading to diabetic nephropathy (DN) progression. Although several pieces of scientific evidence are reported for potential causes of glycation and lipotoxicity in DN, the underlying mechanism of renal lipid accumulation still needs to be fully understood. We provide a rationalized view on how AGEs exert multiple effects that cause SREBP activation and inflammation, contributing to DN through Receptor for AGEs (RAGE) signaling, AGE-R1-dependent downregulation of Sirtuin 1 (SIRT-1), and increased SREBP Cleavage Activating Protein (SCAP) glycosylation. This review emphasizes the association between glycation and the SREBP pathway and how it affects the onset of DN associated with obesity. Finally, we discuss the correlation of glycation and the SREBP pathway with insulin resistance (IR), oxidative stress, endoplasmic reticulum stress, inflammation, and existing and emerging therapeutic approaches toward better controlling obesity-related DN.
已知转录因子固醇调节元件结合蛋白(SREBP)和糖基化途径,特别是晚期糖基化终产物(AGEs)的形成,对肾脏有显著的有害影响。它们改变了肾脏的脂质代谢,促进肾小球硬化、系膜细胞扩张、肾小管间质纤维化和炎症,导致糖尿病肾病(DN)的进展。尽管有一些科学证据表明糖基化和脂毒性可能是 DN 的潜在原因,但肾脏脂质积累的潜在机制仍需要充分理解。我们提供了一个合理的观点,即 AGEs 如何通过 RAGE 信号、AGE-R1 依赖性下调 Sirtuin 1(SIRT-1)和增加 SREBP 切割激活蛋白(SCAP)糖基化来发挥多种作用,导致 SREBP 激活和炎症,从而导致 DN。本综述强调了糖基化和 SREBP 途径之间的关联,以及它如何影响与肥胖相关的 DN 的发生。最后,我们讨论了糖基化和 SREBP 途径与胰岛素抵抗(IR)、氧化应激、内质网应激、炎症以及现有的和新兴的治疗方法之间的相关性,以更好地控制肥胖相关的 DN。