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Supramolecular nanofibrils inhibit cancer progression in vitro and in vivo.

ABSTRACT: Self-assembly of small peptide derivatives affords supramolecular nanofibrils that possess characteristic features of amyloid oligomers. Acting as de novo amyloid oligomers, the nanofibrils effectively inhibit the tumor progression both in vitro and in vivo, which demonstrates a new type of anticancer approach and may provide new insights for inverse comorbidity between cancer and neurodegenerative diseases.

SUBMITTER: Kuang Y

PROVIDER: S-EPMC4134730 | biostudies-literature | 2014 Aug

REPOSITORIES: biostudies-literature

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Supramolecular nanofibrils inhibit cancer progression in vitro and in vivo.

Kuang Yi Y Du Xuewen X Zhou Jie J Xu Bing B

Advanced healthcare materials 20140220 8

Self-assembly of small peptide derivatives affords supramolecular nanofibrils that possess characteristic features of amyloid oligomers. Acting as de novo amyloid oligomers, the nanofibrils effectively inhibit the tumor progression both in vitro and in vivo, which demonstrates a new type of anticancer approach and may provide new insights for inverse comorbidity between cancer and neurodegenerative diseases. ...[more]

PMID: 24574174

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Project description:BackgroundCastration-resistant prostate cancer (CRPC) is currently the main challenge for prostate cancer (PCa) treatment, and there is an urgent need to find novel therapeutic targets and drugs. Prohibitin (PHB1) is a multifunctional chaperone/scaffold protein that is upregulated in various cancers and plays a pro-cancer role. FL3 is a synthetic flavagline drug that inhibits cancer cell proliferation by targeting PHB1. However, the biological functions of PHB1 in CRPC and the effect of FL3 on CRPC cells remain to be explored.MethodsSeveral public datasets were used to analyze the association between the expression level of PHB1 and PCa progression as well as outcome in PCa patients. The expression of PHB1 in human PCa specimens and PCa cell lines was examined by immunohistochemistry (IHC), qRT-PCR, and Western blot. The biological roles of PHB1 in castration resistance and underlying mechanisms were investigated by gain/loss-of-function analyses. Next, in vitro and in vivo experiments were conducted to investigate the anti-cancer effects of FL3 on CRPC cells as well as the underlying mechanisms.ResultsPHB1 expression was significantly upregulated in CRPC and was associated with poor prognosis. PHB1 promoted castration resistance of PCa cells under androgen deprivation condition. PHB1 is an androgen receptor (AR) suppressive gene, and androgen deprivation promoted the PHB1 expression and its nucleus-cytoplasmic translocation. FL3, alone or combined with the second-generation anti-androgen Enzalutamide (ENZ), suppressed CRPC cells especially ENZ-sensitive CRPC cells both in vitro and in vivo. Mechanically, we demonstrated that FL3 promoted trafficking of PHB1 from plasma membrane and mitochondria to nucleus, which in turn inhibited AR signaling as well as MAPK signaling, yet promoted apoptosis in CRPC cells.ConclusionOur data indicated that PHB1 is aberrantly upregulated in CRPC and is involved in castration resistance, as well as providing a novel rational approach for treating ENZ-sensitive CRPC.

Dataset Information

Supramolecular nanofibrils inhibit cancer progression in vitro and in vivo.

Publications

Supramolecular nanofibrils inhibit cancer progression in vitro and in vivo.

Similar Datasets

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