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We previously found that lysosomal dysfunction and impaired autophagic flux contribute to lipotoxicity in obesity-related kidney disease, in both humans and experimental animal models. However, the regulatory factors involved in countering renal lipotoxicity are largely unknown. Here, we found that palmitic acid strongly promoted dephosphorylation and nuclear translocation of transcription factor EB (TFEB) by inhibiting the mechanistic target of rapamycin kinase complex 1 pathway in a Rag GTPase\u2013dependent manner, though these effects gradually diminished after extended treatment. We then investigated the role of TFEB in the pathogenesis of obesity-related kidney disease. Proximal tubular epithelial cell\u2013specific (PTEC-specific)\n                    <jats:italic>Tfeb<\/jats:italic>\n                    -deficient mice fed a high-fat diet (HFD) exhibited greater phospholipid accumulation in enlarged lysosomes, which manifested as multilamellar bodies (MLBs). Activated TFEB mediated lysosomal exocytosis of phospholipids, which helped reduce MLB accumulation in PTECs. Furthermore, HFD-fed, PTEC-specific\n                    <jats:italic>Tfeb<\/jats:italic>\n                    -deficient mice showed autophagic stagnation and exacerbated injury upon renal ischemia\/reperfusion. Finally, higher body mass index was associated with increased vacuolation and decreased nuclear TFEB in the proximal tubules of patients with chronic kidney disease. These results indicate a critical role of TFEB-mediated lysosomal exocytosis in counteracting renal lipotoxicity.\n                  <\/jats:p>","DOI":"10.1172\/jci.insight.162498","type":"journal-article","created":{"date-parts":[[2023,1,17]],"date-time":"2023-01-17T12:00:43Z","timestamp":1673956843000},"source":"Crossref","is-referenced-by-count":59,"title":["TFEB-mediated lysosomal exocytosis alleviates high-fat diet\u2013induced lipotoxicity in the kidney"],"prefix":"10.1172","volume":"8","author":[{"given":"Jun","family":"Nakamura","sequence":"first","affiliation":[{"name":"Department of Nephrology, Osaka University Graduate School of Medicine, Osaka, Japan."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Takeshi","family":"Yamamoto","sequence":"additional","affiliation":[{"name":"Department of Nephrology, Osaka University Graduate School of Medicine, Osaka, 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