Mechanism study on promoting podocyte injury by regulating ATPA1 and PARK2 mediated mitochondrial dysfunction:...

'HSP90AB1 protein macromolecule plays an important role in various cellular stress responses, but its specific mechanism in podiatocyte injury and mitochondrial dysfunction remains unclear. The aim of this study was to investigate the mechanism of how 'HSP90AB1 mediates mitochondrial dysfunction and leads to podiocyte injury through regulation of ATP5A1 and PARK2. Clinical podocyte samples were collected and the MPC5 mouse podocyte cell line was used for experiments. The interaction of 'HSP90AB1 with ATP5A1 and PARK2 was analyzed by transcriptome sequencing, cell culture, 'HSP90AB1 overexpression and knockdown construction, combined immunoprecipitation (CoIP) and immunofluorescence detection. CCK8 was used to measure cell viability, Westernblot and qPCR were used to assess protein and mRNA expression levels, and statistical methods were used to analyze the data. Bioinformatics analysis revealed physical or functional interactions between 'HSP90AB1, ATP5A1, and PARK2 proteins. The interaction between 'HSP90AB1 and these two proteins was verified by cell experiments, and 'HSP90AB1 played an important role in podiatocyte injury. In ADR-induced podocyte injury model, mRNA and protein expressions of 'HSP90AB1, ATP5A1 and PARK2 were significantly changed, and the expression of mitochondrial autophagy related proteins was also changed. Further analysis showed that the interaction between 'HSP90AB1, ATP5A1 and PARK2 played a key role in the process of podiocyte injury. This study revealed that 'HSP90AB1 mediates mitochondrial dysfunction by regulating the interaction of ATP5A1 and PARK2, thereby promoting podiocyte injury. This discovery provides new potential targets for the treatment of podocyte injury and contributes to the understanding of the pathological mechanisms of related diseases.