title: Overexpression of ABCC3 promotes cell proliferation, drug resistance, and aerobic glycolysis and is associated with poor prognosis in urinary bladder cancer patients.
abstract: Human urinary bladder cancer (UBC) is the one of the most common malignancies worldwide and occurs at a higher frequency in male individuals. ATP-binding cassette, subfamily C, member 3 (ABCC3), a member of the ABC transporter family, is highly expressed in tumor cells, where it actively effluxes a broad spectrum of metabolites. However, the expression and role of ABCC3 in human UBC remains unclear. Our study aimed to identify the expression status of ABCC3 in UBC cases and investigate the biological effects on UBC in cells. We found that both mRNA and protein levels of ABCC3 were significantly higher in UBC tissues than normal tissues. Immunochemistry evaluation of ABCC3 expression in 122 UBC clinical specimens showed that high expression of ABCC3 had a positive correlation with UBC tumor size, advanced tumor node metastasis stage, and malignant histology. Moreover, high ABCC3 expression was linked to poor overall survival in UBC. ABCC3 effects on cell proliferation and drug resistance were measured by colony formation and methylthiazolyldiphenyl-tetrazolium bromide (MTT) assays. ABCC3-knockdown cells showed a significant decrease in cell growth and drug resistance. RNA interference of ABCC3 also caused downregulation of lactate dehydrogenase A (LDHA), which positively correlated with ABCC3 expression in UBC specimens. In addition, cancer cell glycolytic ability was decreased upon ABCC3 knockdown. The activity of LDHA was also abrogated in ABCC3-deficient UBC cells, and the blockade of LDHA increased UBC cells sensitivity to Cis-diamine dichloroplatinum (CDDP). In summary, our study suggests ABCC3 is an important oncoprotein involved in glycolysis and drug resistance. These data also indicates that ABCC3 could be a potential prognostic marker and promising therapeutic target in UBC.
authors.affiliation: Department of Urology, The Second People's Hospital of Lianyungang, 161 North Xingfu Road, Haizhou, 222023, China. weicuibeifang@sina.com.
authors.forename: Xuejun
authors.initials: X
authors.lastname: Liu
authors.affiliation: Department of Urology, The Second People's Hospital of Lianyungang, 161 North Xingfu Road, Haizhou, 222023, China.
authors.forename: Dongwei
authors.initials: D
authors.lastname: Yao
authors.affiliation: Department of Urology, The Second People's Hospital of Lianyungang, 161 North Xingfu Road, Haizhou, 222023, China.
authors.forename: Cheng
authors.initials: C
authors.lastname: Liu
authors.affiliation: Department of Nursing, The Second People's Hospital of Lianyungang, 161 North Xingfu Road, Haizhou, 222023, China.
authors.forename: Yunjian
authors.initials: Y
authors.lastname: Cao
authors.affiliation: Department of Urology, The Second People's Hospital of Lianyungang, 161 North Xingfu Road, Haizhou, 222023, China.
authors.forename: Qiurong
authors.initials: Q
authors.lastname: Yang
authors.affiliation: Department of Pathology, The Second People's Hospital of Lianyungang, 161 North Xingfu Road, Haizhou, 222023, China.
authors.forename: Zhichao
authors.initials: Z
authors.lastname: Sun
authors.affiliation: Department of Urology, The Second People's Hospital of Lianyungang, 161 North Xingfu Road, Haizhou, 222023, China.
authors.forename: Duo
authors.initials: D
authors.lastname: Liu
mesh_terms: D000368:Aged; D014408:Biomarkers, Tumor / Q000235:genetics*; D015153:Blotting, Western; D045744:Cell Line, Tumor; D049109:Cell Proliferation; D019008:Drug Resistance, Neoplasm / Q000235:genetics*; D005260:Female; D015972:Gene Expression Regulation, Neoplastic / Q000502:physiology*; D006019:Glycolysis / Q000235:genetics*; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D008875:Middle Aged; D027425:ATP-Binding Cassette, Sub-Family C Proteins / Q000235:genetics*; D011379:Prognosis; D060888:Real-Time Polymerase Chain Reaction; D001749:Urinary Bladder Neoplasms / Q000188:drug therapy / Q000235:genetics* / Q000473:pathology
chemical_list: D014408:Biomarkers, Tumor; D027425:ATP-Binding Cassette, Sub-Family C Proteins; C114462:multidrug resistance-associated protein 3
keywords: ABCC3; Aerobic glycolysis; Cell growth; Drug sensitivity; Prognostic marker; Urinary bladder cancer