Abstract
Background
miR-23a, which participates in invasion of pancreatic ductal adenocarcinoma cells into the mesothelial barrier, is a critical regulator in many cancers. It, however, is still unknown whether miR-23a regulates pancreatic cell proliferation and apoptosis or not.
Aims
We sought to investigate the role of miR-23a in regulation of pancreatic cell proliferation and apoptosis.
Methods
miRNA, mRNA, and protein expressions were determined by qRT-PCR and Western blot, respectively. Dual-luciferase reporter assay was used in detection for binding ability of miR-23a to APAF1. Ectopic miR-23a and APAF 1 were introduced to pancreatic cells, and their roles in proliferation and apoptosis were detected by MTT, colony formation, and apoptosis assays, respectively.
Results
Up-regulation of miR-23a and down-regulation of APAF 1 were found in pancreatic ductal cancer, respectively. miR-23a significantly inhibited the luciferase activity by targeting APAF 1 3′UTR. Ectopic miR-23a significantly suppressed the APAF 1 gene expression in pancreatic cancer cells. Similar to siAPAF1, miR-23a significantly promoted pancreatic cancer cell proliferation and repressed apoptosis. Furthermore, miR-23a inhibitor and exogenous APAF 1 could recover the effects.
Conclusions
It is suggested that miR-23a, acting as an oncogenic regulator by directly targeting APAF 1 in pancreatic cancer, is a useful potential biomarker in diagnosis and treatment of pancreatic cancer.
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Acknowledgments
This work was supported by the National Natural Science Foundations of China (81172577, 81372876 and 81301767).
Conflict of interest
Fu WN is currently receiving two Grants from National Natural Science Foundations of China (81172577 and 81372876). Liu N is currently getting a Grant from National Natural Science Foundations of China (81301767). For the remaining authors, none declared the conflicts of interest.
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Liu, N., Sun, YY., Zhang, XW. et al. Oncogenic miR-23a in Pancreatic Ductal Adenocarcinogenesis Via Inhibiting APAF1 . Dig Dis Sci 60, 2000–2008 (2015). https://doi.org/10.1007/s10620-015-3588-x
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DOI: https://doi.org/10.1007/s10620-015-3588-x