Angiotensin-(1-7) Modulates the Warburg Effect to Alleviate Inflammation in LPS-Induced Macrophages and Septic Mice

作者全名："Yu, Dan; Huang, Wenhan; Sheng, Min; Zhang, Shan; Pan, Hang; Ren, Feifeng; Luo, Lei; Zhou, Jun; Huang, Dongmei; Tang, Lin"

作者地址："[Yu, Dan; Huang, Wenhan; Sheng, Min; Zhang, Shan; Pan, Hang; Ren, Feifeng; Luo, Lei; Zhou, Jun; Huang, Dongmei; Tang, Lin] Chongqing Med Univ, Affiliated Hosp 2, Dept Rheumatol & Immunol, 74 Linjiang Rd, Chongqing, Peoples R China"

通信作者："Tang, L (通讯作者)，Chongqing Med Univ, Affiliated Hosp 2, Dept Rheumatol & Immunol, 74 Linjiang Rd, Chongqing, Peoples R China."

来源：JOURNAL OF INFLAMMATION RESEARCH

ESI学科分类：IMMUNOLOGY

WOS号：WOS:001165985500001

JCR分区：Q2

影响因子：4.2

年份：2024

卷号：17

期号：　

开始页：469

结束页：485

文献类型：Article

关键词：Ang-(1-7); macrophage; sepsis; Warburg effect; glycolysis; citrate

摘要："Purpose: Inflammation triggers a metabolic shift in macrophages from oxidative phosphorylation to glycolysis, a phenomenon known as the Warburg effect. This metabolic reprogramming worsens inflammation and cascades into organ damage. Angiotensin-(1-7) [Ang(1-7)], a small molecule, has demonstrated anti-inflammatory properties. This study investigates whether Ang-(1-7) mitigates inflammation in LPS-induced macrophages and septic mice by regulating the Warburg effect in immune metabolism. Methods: The study induced macrophages with LPS in vitro and measured inflammatory factors using ELISA and Western blot. Key enzymes in glycolysis, mitochondrial respiratory complexes, and citrate pathway key molecules were assessed using Western blot and qRT-PCR. Mitochondrial membrane potential (MMP), lactate, and ATP were measured using assay kits. In vivo, a mouse model of sepsis induced by LPS was used. Kidney tissues were examined for pathological and mitochondrial ultrastructural alterations. The levels of inflammatory factors in mouse serum, glycolysis and citrate pathway-related molecules in the kidney were assessed using qRT-PCR, Western blot, and immunofluorescence techniques. Additionally, MMP, lactate, and ATP in the kidney were measured using assay kits. Results: In vitro experiments demonstrated that Ang-(1-7) inhibited the levels of inflammatory factors in LPS-treated RAW264.7 cells. It also reduced the expression of key glycolytic enzymes HK2, PFKFB3, and PKM2, as well as lactate levels. Additionally, it decreased intracellular citrate accumulation, enhanced mitochondrial respiratory complexes I and III, and ATP levels. Ang-(1-7) alleviated MMP damage, modulated citrate pathway-related molecules, including SLC25A1, ACLY, and HIF-1 alpha. In vivo experiments showed that Ang-(1-7) lowered glycolysis levels in septic mice, improved mitochondrial ultrastructure and function, mitigated inflammation and renal tissues damage in septic mice, and suppressed the expression of key molecules in the citrate pathway. Conclusion: In conclusion, Ang-(1-7) can regulate the Warburg effect through the citrate pathway, thereby alleviating inflammation in LPS-induced macrophages and septic mice."

基金机构："National Natural Science Foundation of China [81771738]; Chongqing Science and Technology Innovation Leading Talent Support Program [CQYC202104]; Program for Youth Innovation in Future Medicine, Chongqing Medical University [W0197]; Kuanren Talents Program of the Second Affiliated Hospital of Chongqing Medical University [13-002-017]"

基金资助正文："This study was supported by the National Natural Science Foundation of China (81771738) , Chongqing Science and Technology Innovation Leading Talent Support Program (CQYC202104) , the Program for Youth Innovation in Future Medicine, Chongqing Medical University (W0197) and the Kuanren Talents Program of the Second Affiliated Hospital of Chongqing Medical University (13-002-017) ."