The expression and clinical prognostic value of protein phosphatase 1 catalytic subunit beta in pancreatic cancer

Lingyu Hu; Haokai Xu; Xiaoguang Wang; Bin Wu; Fei Chen; Wei Chen; Yong Gao; Zhengxiang Zhong

doi:10.1080/21655979.2021.1934243

The expression and clinical prognostic value of protein phosphatase 1 catalytic subunit beta in pancreatic cancer

Bioengineered. 2021 Dec;12(1):2763-2778. doi: 10.1080/21655979.2021.1934243.

Authors

Lingyu Hu^{1

2}, Haokai Xu^{1

3}, Xiaoguang Wang², Bin Wu², Fei Chen², Wei Chen⁴, Yong Gao¹, Zhengxiang Zhong^{1

2}

Affiliations

¹ Bengbu Medical College, Bengbu, Anhui P.R. China.
² Department of Surgery, The Second Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang P.R. China.
³ Department of Surgery, Ningbo Yinzhou No.2 Hospital, Ningbo, Zhejiang, P. R. China.
⁴ Cancer Institute of Integrated Traditional Chinese and Western Medicine, Zhejiang Academy of Traditional Chinese Medicine, Tongde Hospital of Zhejiang Province, Hangzhou, Zhejiang, P.R. China.

Abstract

Pancreatic cancer (PAAD) is a common malignancy with a poor survival rate. The identification of novel biomarkers could improve clinical outcomes for patients with PAAD. Here we evaluated the expression and clinical significance of PPP1CB in PAAD. PPP1CB expression was higher in PAAD tissue than in matched paracancerous tissue (P < 0.05). We predicted a network of regulatory targets and protein interaction partners of PPP1CB, and identified a PPI network consisting of 39 node genes. The expression of 33 node genes was higher in PAAD tissue than in matching paracancerous tissue. High expression of the node genes ACTN4, ANLN, CLTB, IQGAP1, SPTAN1, and TMOD3 was associated with improved overall survival (P < 0.05). SiRNA knockdown of PPP1CB significantly reduced the migration and invasion of PAAD cells. A PPP1CB immunohistochemical staining was performed using a tissue microarray (TMA), consisting of tumor samples collected from 91 patients with PAAD (88 of which contained matched paracancerous tissues). The expression of PPP1CB in PAAD was significantly higher than in the matched paracancerous tissue, (P = 0.016). High PPP1CB expression was associated with patient sex (P = 0.048), alcohol use (P = 0.039), CEA (P= 0.038), N stage (P = 0.001), and invasion of nerve (P = 0.036). Furthermore, high PPP1CB expression was associated with significantly poorer overall survival (P = 0.022). Our data demonstrate that PPP1CB is associated with the migration and invasion of PAAD cells, and may be useful as an independent prognostic indicator for clinical outcome in patients with PAAD.

Keywords: Bioinformatics analysis; pancreatic adenocarcinoma; prognosis; protein phosphatase 1 catalytic subunit beta.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Biomarkers, Tumor / genetics
Biomarkers, Tumor / metabolism
Computational Biology
Female
Humans
Male
Middle Aged
Pancreatic Neoplasms* / diagnosis
Pancreatic Neoplasms* / genetics
Pancreatic Neoplasms* / metabolism
Pancreatic Neoplasms* / mortality
Prognosis
Protein Phosphatase 1 / genetics*
Protein Phosphatase 1 / metabolism
Transcriptome / genetics

Substances

Biomarkers, Tumor
PPP1CB protein, human
Protein Phosphatase 1

Grants and funding

This work was supported by the Project of Zhejiang Provincial Medical and Health Research (No. 2019KY219) and The science and technology planning project of Jiaxing City (No. 2020AY30017);