Therapeutic potential of IBP as an autophagy inducer for treating lung cancer via blocking PAK1/Akt/mTOR signaling.

ABSTRACT: Lung cancer is the most frequent and fatal malignancy in humans worldwide, yet novel successful drugs for control of this disease are still lacking. Ipomoea batatas polysaccharides (IBPs) have been implicated in inhibiting diverse cancer types, but their functions in mitigating lung cancer are largely unknown. In this study, we identify a role of IBP in inhibiting lung cancer proliferation. We found that IBP significantly impedes the proliferation of lung cancer cells by inducing cytostatic macroautophagy both in vitro and in vivo. Mechanistically, IBP specifically promotes ubiquitination-mediated degradation of PAK1 (p21-activated kinase 1) and blocks its downstream Akt1/mTOR signaling pathway, leading to increased autophagic flux. In lung cancer xenografts in mice, I

SUBMITTER: Bu H 

PROVIDER: S-EPMC7851497 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature