OncoTargets and Therapy (Oct 2019)

INPP4B As A Prognostic And Diagnostic Marker Regulates Cell Growth Of Pancreatic Cancer Via Activating AKT

  • Zhai S,
  • Liu Y,
  • Lu X,
  • Qian H,
  • Tang X,
  • Cheng X,
  • Wang Y,
  • Shi Y,
  • Deng X

Journal volume & issue
Vol. Volume 12
pp. 8287 – 8299

Abstract

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Shuyu Zhai,* Yuanbin Liu,* Xiongxiong Lu,* Hao Qian, Xiaomei Tang, Xi Cheng, Yue Wang, Yusheng Shi, Xiaxing Deng Department of General Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, People’s Republic of China*These authors contributed equally to this workCorrespondence: Xiaxing Deng; Yusheng ShiDepartment of General Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 RuiJin 2 Road, Shanghai 200025, People’s Republic of ChinaEmail [email protected]; [email protected]: Inositol polyphosphate 4-phosphatase type II (INPP4B), a member of the PI3K/Akt signaling pathway, plays a vital role in the initiation and progression of cancers. However, its biological role in pancreatic cancer remains largely undiscovered. Our study aimed to investigate the effects of INPP4B on proliferation in pancreatic cancer and its clinical relevance.Materials and methods: INPP4B expression data were obtained from The Cancer Genome Atlas (TCGA) and Gene Expression Omnibus (GEO) databases. Clinicopathological and survival data were retrieved from the TCGA database. CCK8 and colony formation assays were performed to measure the proliferative capacity of pancreatic cancer. Tumor xenograft models were established to measure cancer proliferative abilities in vivo.Results: INPP4B was upregulated in pancreatic cancer tissue compared with normal tissue. INPP4B knockdown inhibited cell proliferation and promoted apoptosis in pancreatic cancer in vitro and in vivo. INPP4B knockdown also reduced AKT phosphorylation. Moreover, INPP4B was associated with poor overall and disease-free survival, with Cox regression analysis showing that INPP4B could serve as an independent prognostic marker. ROC curve analysis showed that INPP4B possessed moderate diagnostic value.Conclusion: Collectively, INPP4B is an oncogenic gene in pancreatic cancer and could serve as a potential diagnostic marker and an independent prognostic marker, suggesting that it could be a novel therapeutic target for pancreatic cancer.Keywords: INPP4B, pancreatic cancer, proliferation, prognosis, diagnosis

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