Objective: Chronic kidney disease (CKD) is a complex disorder resulting from a combination of various environmental and genetic factors. Considerable efforts have been dedicated to elucidating its etiological mechanisms. Nevertheless, the pathogenic mechanism of CKD remains poorly understood, which hinders the development of effective therapeutic strategies. In this study, we aimed to identify novel mediators that could contribute to the development of CKD.
Methods: The ClinVar, STRING, MEME Suite, TRRUST, bedtools, GEO, and R Studio databases and software were used to analyze their common features and investigate potential CKD disease genes. Transcriptomic analysis, immunohistochemistry, qRT-PCR, and Western blotting were utilized to further validate the role of ECT2 in kidney fibrosis.
Results: In total, 26 CKD disease genes were obtained from the ClinVar database, and the STRING, MEME Suite, TRRUST, bedtools, and GEO databases and software were used to analyze their common properties and explore potential CKD disease genes. Epithelial cell transforming sequence 2 (ECT2), cyclin B 1, caspase 7 and collagen alpha-1 (IV) were identified as potential candidates for CKD progression. Weighted correlation network analysis (WGCNA) subsequently revealed the relationships between potential genes and CKD. The results of the transcriptomic analysis further confirmed that ECT2 expression was greater in the kidney tissue of CKD patients than in that of healthy controls. Next, immunohistochemistry and Western blotting demonstrated that ECT2 was predominantly expressed in the renal tubules of a unilateral ureteral obstruction (UUO) mouse model. Consistently, in vitro experiments revealed that ECT2 was upregulated in TGF-β1-treated HK-2 cells. Moreover, ECT2 overexpression or knockdown in HK-2 cells altered the intensity of fibrosis markers.
Conclusion: ECT2 significantly affects the development and progression of CKD, particularly in association with tubulointerstitial fibrosis.
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