a School of Pharmacy, Zhejiang Chinese Medical University, No. 548 Binwen Road, Hangzhou, Zhejiang, 310053, China
b The Third Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, 310009, China
c College of Chinese Materia Medica and Food Engineering, Shanxi University of Chinese Medicine, Jinzhong, 030600, China
Funds:
This work was financially supported by the National Natural Science Foundation of China (No. 82204625), the Natural Science Foundation of Zhejiang Province (Nos. LQ23H280013 and LZ22H280001), the Chinese Medicine Research Program of Zhejiang Province (Nos. 2021ZZ009, 2023ZR009, and 2021ZQ023), the Youth Natural Science Program of Zhejiang Chinese Medical University (No. 2021RCZXZK14).
Renal fibrosis is a devastating consequence of progressive chronic kidney disease, representing a major public health challenge worldwide. The underlying mechanisms in the pathogenesis of renal fibrosis remain unclear, and effective treatments are still lacking. Renal tubular epithelial cells (RTECs) maintain kidney function, and their dysfunction has emerged as a critical contributor to renal fibrosis. Cellular quality control comprises several components, including telomere homeostasis, ubiquitin-proteasome system, autophagy, mitochondrial homeostasis (mitophagy and mitochondrial metabolism), endoplasmic reticulum (unfolded protein response), and lysosomes. Failures in the cellular quality control of RTECs, including deoxyribonucleic acid (DNA), protein, and organelle damage, exert profibrotic functions by leading to senescence, defective autophagy, endoplasmic reticulum stress, mitochondrial and lysosomal dysfunction, apoptosis, fibroblast activation, and immune cell recruitment. In this review, we summarize recent advances in understanding the role of quality control components and intercellular crosstalk networks in RTECs, within the context of renal fibrosis.