Curcumin induces apoptotic cell death in human pancreatic cancer cells via the miR-340/XIAP signaling pathway

Yang,Deying; Li,Yutao; Zhao,Deqin

doi:10.3892/ol.2017.6321

Curcumin induces apoptotic cell death in human pancreatic cancer cells via the miR-340/XIAP signaling pathway

Authors:
- Deying Yang
- Yutao Li
- Deqin Zhao
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Affiliations: Department of Gastrointestinal Surgery, Linyi People's Hospital, Linyi, Shandong 276000, P.R. China, Department of Neurosurgery, Linyi Chinese Medicine Hospital, Linyi, Shandong 276000, P.R. China
Published online on: June 6, 2017 https://doi.org/10.3892/ol.2017.6321
Pages: 1811-1816

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Abstract

The natural compound curcumin has previously been reported to inhibit pancreatic cancer cell growth. However, the underlying molecular mechanisms underlying this effect remain unclear. Results from the present study demonstrate that the miR‑340/X‑linked inhibitor of apoptosis (XIAP) signaling pathway mediates curcumin‑induced pancreatic cancer cell apoptosis. miR‑340 was identified to be significantly upregulated following curcumin treatment. In addition, treatment with curcumin or miR‑340 induced pancreatic cancer cell apoptosis, whereas silencing endogenous miR‑340 significantly inhibited the proapoptotic effect of curcumin. A luciferase reporter assay and western blot analysis identified that the oncogene XIAP is a direct target of miR‑340. Furthermore, curcumin treatment significantly reduced XIAP expression, an effect that was rescued by treatment with anti‑miR‑340. The results of the present study suggest that the miR‑340/XIAP signaling pathway is a downstream target of curcumin that mediates its proapoptotic effects on pancreatic cancer cells. This may provide the basis for novel treatment strategies for patients with pancreatic cancer.

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