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Long Noncoding RNA GAS5 Modulates α-Solanine-induced Radiosensitivity by Negatively Regulating miR-18a in Human Prostate Cancer Cells

Long Noncoding RNA GAS5 Modulates α-Solanine-induced Radiosensitivity by Negatively Regulating miR-18a in Human Prostate Cancer Cells

Jinhui Yang, Tongtong Hao, Jiantao Sun, Pengtao Wei, Han Zhang

Biomed Pharmacother. 2019 Apr;112:108656.

PMID: 30970507

Abstract:

Radiotherapy is an adjuvant treatment of surgery in prostate cancer, while radioresistance has been the challenge of treatment. It has been reported that α-Solanine exhibits anti-cancer activity and enhances the chemo- and radio-sensitivity in several human cancers, whereas the role of α-Solanine on radiosensitivity to PCa remains to be uncovered yet. We found α-Solanine decreased cell viability in human PCa cells rather than normal prostate epithelial cells in vitro. Functional experiments showed that cell viability and colonies formation were declined & apoptosis rate and DNA double strand breaks (DSBs) marker γ-H2AX expressions were elevated by α-Solanine in PCa cells treated with X-ray irradiation, compared with X-ray irradiation treatment only. GAS5 was down-regulated & miR-18a was up-regulated in PCa cells, which was reversed in the presence of α-Solanine. Effects of ectopic GAS5 on inhibiting cell viability and survival & promoting apoptosis and DNA damage were reversed by miR-18a overexpression in PCa cells. Moreover, GAS5 regulated miR-18a expression by target binding during α-Solanine treatment. Collectively, α-Solanine suppresses cell proliferation and promotes radiosensitivity through up-regulating GAS5/miR-18a pathway in PCa. Our results provide a novel mechanism of α-Solanine treatment in human prostate cancer and help to develop a new approach to sensitizing radioresistant prostate cancer cells by targeting GAS5/miR-18a.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP20562021	α-Solanine		20562-02-1	Price

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