International Journal of Molecular Sciences Article Comprehensive Analysis of Expression, Clinicopathological Association and Potential Prognostic Significance of RABs in Pancreatic Cancer Shashi Anand 1,2, Mohammad Aslam Khan 1,2, Moh’d Khushman 3 , Santanu Dasgupta 1,2 , Seema Singh 1,2,4 and Ajay Pratap Singh 1,2,4,* 1 Department of Pathology, College of Medicine, University of South Alabama, Mobile, AL 36617, USA;
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[email protected] (S.S.) 2 Cancer Biology Program, Mitchell Cancer Institute, University of South Alabama, Mobile, AL 36604, USA 3 Department of Medical Oncology, Mitchell Cancer Institute, University of South Alabama, Mobile, AL 36604, USA;
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[email protected]; Tel.: +1-251-445-9843; Fax: +1-251-460-6994 Received: 3 July 2020; Accepted: 30 July 2020; Published: 4 August 2020 Abstract: RAB proteins (RABs) represent the largest subfamily of Ras-like small GTPases that regulate a wide variety of endosomal membrane transport pathways. Their aberrant expression has been demonstrated in various malignancies and implicated in pathogenesis. Using The Cancer Genome Atlas (TCGA) database, we analyzed the differential expression and clinicopathological association of RAB genes in pancreatic ductal adenocarcinoma (PDAC). Of the 62 RAB genes analyzed, five (RAB3A, RAB26, RAB25, RAB21, and RAB22A) exhibited statistically significant upregulation, while five (RAB6B, RAB8B, RABL2A, RABL2B, and RAB32) were downregulated in PDAC as compared to the normal pancreas.