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- Title
YAP mediates the interaction between the Hippo and PI3K/Akt pathways in mesangial cell proliferation in diabetic nephropathy.
- Authors
Qian, Xuan; He, Linlin; Hao, Meng; Li, Yuan; Li, Xizhi; Liu, Yiqi; Jiang, Hong; Xu, Liu; Li, Chengcheng; Wu, Wenya; Du, Lei; Yin, Xiaoxing; Lu, Qian
- Abstract
Aims: Glomerular mesangial cell (MC) proliferation is one of the main pathological changes in diabetic nephropathy (DN), but its mechanism needs further elaboration. The Hippo and PI3K/Akt signalling pathways are involved in the regulation of MC proliferation, but their relationship in hyperglycaemia-induced MC proliferation has not been reported. Methods: We used db/db mice and high-glucose-cultured mesangial cells to generate a diabetic nephropathy model. An MST1-knockdown plasmid was used to identify whether the PI3K/Akt pathway is linked to the Hippo pathway through MST1. LY294002 and SC79 were used to verify the role of the PI3K/Akt signalling pathway in MC cells. RNA silencing and overexpression were performed by using YAP and PTEN-expression/knockdown plasmids to investigate the function of YAP and PTEN, respectively, in the Hippo and PI3K/Akt signalling pathways. Results: By examining a potential feedback loop, we found decreased phosphorylation of MST1 and Lats1 and increased PI3K/Akt activation in db/db mice and high glucose-treated MCs, along with increased MC proliferation. The results of our gene silencing experiment proved PI3K/Akt-mediated intervention in the Hippo pathway and the regulatory effect of YAP on PI3K/Akt through PTEN. Conclusions: The Hippo pathway is inhibited under diabetic conditions, leading to YAP activation and promoting MC proliferation. The PI3K/Akt pathway is activated through the inhibitory effect of YAP on its repressor, PTEN. Finally, activation of the PI3K/Akt pathway inhibits the Hippo pathway, resulting in nuclear YAP accumulation and accelerating MC proliferation and DN formation.
- Subjects
CELL proliferation; DIABETIC nephropathies; PATHOLOGICAL physiology; PHOSPHORYLATION; PLASMIDS
- Publication
Acta Diabetologica, 2021, Vol 58, Issue 1, p47
- ISSN
0940-5429
- Publication type
Article
- DOI
10.1007/s00592-020-01582-w