[No authors listed]
Melanoma is the most aggressive form of skin cancer and causes 50,000 deaths annually worldwide. The roles of proline-dependent process and autophagy have both been reported in studies on melanoma. In the present study, we focused on the effect of pyrroline-5-carboxylate reductase-2 (PYCR2) on inducing autophagy process in melanoma. The expression of PYCR2 was regulated by an technique, and the cell proliferation of A375 cell line was determined by methyl thiazolyl tetrazolium test; the effect of PYCR2 on the apoptosis process and AMPK/mTOR pathway was evaluated by flow cytometry assay and Western blot. It was found that silence of PYCR2 resulted in the decrease of proliferative ability and activation of AMPK/mTOR-induced autophagy of A375 cells. PYCR2 silencing also activated AMPK/mTOR pathway in another melanoma cell line, CHL-1. However, the overexpression of PYCR2 seemed to make no difference to the cell viability and targeted pathway. Our results offered a preliminary illustration on the mechanism of the PYCR2-dependent autophagy and showed that PYCR2 was a potential therapeutic target of melanoma.
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