folliculin interacts with rab35 to regulate egf-induced egfr degradation

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ID: 216986
2017
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Ranked #271 of 333 articles by views in chemical research in chinese universities

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Abstract
Aims and Hypothesis: This study aims to investigate the mechanism involved in intracellular regulation of EGFR degradation induced by EGF.Methods: Phosphorylation of proteins related to EGFR signaling was examined by western blot analysis. Activation, connection between Rab35 and folliculin (FLCN) were assessed by pulldown, coimmunoprecipitation assays separately. The relationship between FLCN and cell growth was detected using gene overexpression and knock-down techniques.Results: Here, we demonstrate that interfering with FLCN, a tumor suppressor, reduces the rate of EGF-induced EGFR degradation, resulting in prolonged activation of downstream signaling. Rab35 is also involved in these processes. Moreover, C-terminal of FLCN binds to and activates Rab35. Of special interest is the observation that erlotinib, a selective EGFR inhibitor, not only obstructs the EGFR-mediated cellular signaling, but also abolishes EGF-stimulated EGFR degradation. Further results reveal that EGF facilitates the activation of Rab35, and FLCN modulates EGF-dependent Rab35 activation and cell growth.Conclusions: Taken together, our study proposes a negative-feedback regulation model in which FLCN mediates EGF-induced Rab35 activation, thereby increasing EGFR degradation and attenuating EGFR signaling.
Reference Key
zheng2017frontiersfolliculin Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Jianchao Zheng;Biao Duan;Shixiu Sun;Shixiu Sun;Jie Cui;Jie Cui;Jun Du;Jun Du;Yujie Zhang;Yujie Zhang
Journal chemical research in chinese universities
Year 2017
DOI
10.3389/fphar.2017.00688
URL
http://journal.frontiersin.org/article/10.3389/fphar.2017.00688/full
Keywords
EGFR degradation pharmacology

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