目的:我们进行了一项荟萃分析,以研究高脂饮食(HFD)诱导的糖尿病是否具有改变小鼠肝脏自噬过程的潜力。
方法:使用电子数据库进行了系统的文献检索(PubMed,EMBASE,WebofScience)。研究设计,人口,干预,结果,并对偏倚风险进行了分析。鉴于研究的可用性,我们进行了一项包括23项研究的定量荟萃分析.
结果:搜索找到了5754篇文章,有48个符合资格标准,由1033只动物组成。荟萃分析显示,用HFD喂养的糖尿病小鼠没有p62降解(SMD4.63,95%CI2.02至7.24,p=0.0005;I2=77%),p-mTOR/mTOR的较高表达(SMD5.20,95%CI1.00至9.39,p=0.01;I2=78%),与非糖尿病小鼠相比,p-AMPK/AMPK比率降低(SMD-2.02,95%CI-3.96至-0.09,p=0.04;I2=85%)。当与链脲佐菌素结合时,动物呈现减少的ATG-7和LC3-II。荟萃回归结果显示,由于血糖水平升高,自噬反应减少,脂肪含量,和长期暴露于HFD,和先进的动物时代。常见的和物种特异性的蛋白质反应也与自噬的抑制一致。
结论:消耗HFD后,肝脏中自噬机制的正常过程能力较差。(自动)吞噬溶酶体的不稳定导致糖尿病的长期存在,代谢功能障碍相关的脂肪肝疾病,细胞死亡。
OBJECTIVE: We conducted a meta-analysis to investigate whether diabetes induced by a high-fat diet (HFD) has the potential to alter the process of autophagy in the murine liver.
METHODS: A systematic literature search was performed with electronic databases (PubMed, EMBASE, Web of Science). Study design, population, intervention, outcome, and risk of bias were analyzed. Given the availability of studies, a quantitative meta-analysis including 23 studies was performed.
RESULTS: The search found 5754 articles, with 48 matching the eligibility criteria, comprising of 1033 animals. The meta-analysis showed that diabetic murines fed with HFD presented an absence of p62 degradation (SMD 4.63, 95 % CI 2.02 to 7.24, p = 0.0005; I2 = 77 %), higher expression of p-mTOR/mTOR (SMD 5.20, 95 % CI 1.00 to 9.39, p = 0.01; I2 = 78 %), and a decreased p-AMPK/AMPK ratio (SMD -2.02, 95 % CI -3.96 to -0.09, p = 0.04; I2 = 85 %) when compared to nondiabetic murines. When associated with streptozotocin, the animals presented decreased ATG-7 and LC3-II. The meta-regression results showed a decrease in autophagy responses due to increased glycemic levels, fat content, and long-term exposure to HFD, and advanced animal age. The common and species-specific protein responses were also consistent with the inhibition of autophagy.
CONCLUSIONS: The normal process of autophagy mechanisms in the liver is less competent after HFD consumption. The destabilization of (auto)phagolysosomes contributes to the perpetuation of diabetes, metabolic dysfunction-associated fatty liver disease, and cell death.