Atractylodes-I Overcomes the Oxidative Stress-induced Colonic Mucosal Epithelial Cells Dysfunction to Prevent Irritable Bowel Syndrome Via Modulating the miR-34a-5p-LDHA Signaling Pathway

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作   者：

Xu, Ruilian;  Liu, Xianyong;  Tian, Mengfei;  Chen, Diping; 

作者机构：

Nanjing Univ Tradit Chinese Med;  Nanjing Med Univ; 

关键词：

atractylenolide-I;  ATRACTYLENOLIDE-I;  Irritable bowel syndrome;  colonic mucosal epithelial cell;  glucose metabolism;  lactate dehydrogenase-A;  miR-34a-5p; 

期刊名称：

Current molecular medicine

i s s n：

1566-5240

年卷期：

2023 年 23 卷 8 期

页   码：

825-833

页   码：

摘   要：

Background: Irritable bowel syndrome (IBS) is a known brain-gut disorder. Currently, the molecular and cellular mechanisms of IBS remain unclear. Atractylenolide-I (ATL-I) is a majorly bioactive component extracted from Rhizoma Atractylodes Macrocephalae. Methods: Studies have revealed that ATL-I functioned as an anti-tumor drug in various cancers. However, the effects and molecular mechanisms of ATL-I on the pathological processes of colonic mucosal epithelial cells (CMECs) during IBS remain unclear. This study reports ATL-I effectively alleviated the oxidative stress-induced colonic mucosal epithelial cell dysfunction. In colonic mucosal tissues from IBS patients, we detected upregulated miR-34a-5p and suppressed glucose metabolism enzyme expressions. Under H2O2 treatment which mimics in vitro oxidative stress, miR-34a-5p was induced and glucose metabolism was inhibited in the colon mucosal epithelial cell line, NCM460. Meanwhile, ATL-I treatment effectively overcame the oxidative stress-induced miR-34a-5p expression and glucose metabolism in NCM460 cells. Results: By bioinformatics analysis, Western blot and luciferase assay, we illustrated that miR-34a-5p directly targeted the 3'UTR region of glucose metabolism key enzyme, lactate dehydrogenase-A (LDHA) in colonic mucosal epithelial cells. Rescue experiments validated that miR-34a-5p inhibited glucose metabolism by targeting LDHA. Finally, we demonstrated that ATL-I treatment reversed the miR-34a-5p-inhibited glucose metabolism and -exacerbated colonic mucosal epithelial cell dysfunction under oxidative stress by modulating the miR-34a-5p-LDHA pathway. Conclusion: Summarily, our study reports the roles and mechanisms of ATL-I in the oxidative stress-induced colonic mucosal epithelial cell dysfunction during IBS through regulating the miR-34a-5p-LDHA-glucose metabolism axis.