Journal
CELL DEATH & DISEASE
Volume 11, Issue 5, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41419-020-2510-4
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Funding
- National Natural Science Foundation of China [81871496, 81971757]
- Zhenjiang Key Laboratory of High Technology Research on Exosomes Foundation and Transformation Application [ss2018003]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (Phase III)
- Sixth Talent Peaks Project of Jiangsu Province [2018-YY-014]
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Exosomes from human umbilical cord mesenchymal stem cells (hucMSC-Ex) have been suggested as novel nanomaterials for regenerative medicine. Here we explored the roles of hucMSC-Ex through regulating Yes-associated protein (YAP) in renal injury repair by using rat unilateral ureteral obstruction (UUO) models. Our study identified mechanical stress induced YAP nucleus expression and stimulated collagen deposition and interstitial fibrosis in the kidney. Then, infusion with hucMSC-Ex promoted YAP nuclear cytoplasmic shuttling and ameliorated renal fibrosis in UUO model. Interestingly, hucMSC-Ex delivered casein kinase 1 delta (CK1 delta) and E3 ubiquitin ligase beta -TRCP to boost YAP ubiquitination and degradation. Knockdown of CK1 delta and beta -TRCP in hucMSC decreased the repairing effects of hucMSC-Ex on renal fibrosis. Our results suggest that hucMSC-Ex attenuates renal fibrosis through CK1 delta/beta -TRCP inhibited YAP activity, unveiling a new mechanism for the therapeutic effects of hucMSC-Ex on tissue injury and offering a potential approach for renal fibrosis treatment.
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