microRNA-99a acts as a tumor suppressor and is down-regulated in bladder cancer
نویسندگان
چکیده
BACKGROUND Increasing evidences have documented that microRNAs (miRNAs) act as oncogenes or tumor suppressors in a variety types of cancer. The discovery of tumor associated miRNAs in serum of patients gives rise to extensive investigation of circulating miRNAs in many human cancers which support the use of plasma/serum miRNAs as noninvasive means of cancer detection. However, the aberrant expression of miRNAs and the circulating miRNAs in bladder cancer are less reported. METHODS We used Taqman probe stem-loop real-time PCR to accurately measure the levels of miR-99a in bladder cancer cell lines, 100 pairs of bladder cancer tissues, the adjacent non-neoplastic tissues and plasma collected from bladder cancer patients or control patients. miR-99a mimics were re-introduced into bladder cancer cells to investigate its role on regulating cell proliferation which was measured by CCK-8 assay and cell cycle analysis. RESULTS miR-99a was significantly down-regulated in bladder cancer tissues, and even the lower expression of miR-99a was correlative with the more aggressive phenotypes of bladder cancer. Meanwhile, enforced expression of miR-99a can inhibit the cell proliferation of bladder cancer cells. Furthermore, investigation of the expression of miR-99a in plasma of bladder cancer patients showed that miR-99a was also decreased in plasma of bladder cancer patients. The results strongly supported miR-99a as the potential diagnostic marker of bladder cancer. CONCLUSIONS Our data indicated that miR-99a might act as a tumor suppressor in bladder cancer and was significantly down-regulated in development of bladder cancer.
منابع مشابه
Evaluation of MicroRNA-99a and MicroRNA-205 Expression Levels in Bladder Cancer
Bladder cancer is the second most common cancer in the genitourinary tract, showing often recurrence and progresse into invasive states. Epigenetic changes, such as microRNA alteration are involved in bladder cancer tumorigenesis through a variety of signaling pathways. The epigenetic state depends on geographic and lifestyle conditions. The aim of this study was to investigate the expression l...
متن کاملAuthor's response to reviews Title:microRNA-99a acts as a tumor suppressor and is down-regulated in bladder cancer Authors:
متن کامل
Evaluation of MicroRNA-99a and MicroRNA-205 Expression Levels in Bladder Cancer
Bladder cancer is the second most common cancer in the genitourinary tract, showing often recurrence and progress into invasive states. Epigenetic changes, such as microRNA alteration are involved in bladder cancer tumorigenesis through a variety of signaling pathways. The epigenetic state depends on geographic and lifestyle conditions. The aim of this study was to investigate the expression le...
متن کاملAppraising microRNA-99a as a novel prognostic biomarker across 21 human cancer types based on data from the cancer genome atlas
Background: MicroRNA-99a has been believed to play a critical role in progression in various cancers; however, the prognostic and clinicopathological value of microRNA-99a in cancers remains unclarified. Methods and Results: We first evaluated the prognostic significance of microRNA-99a expression in 21 human cancer types in The Cancer Genome Atlas (TCGA). Patients with lower microRNA-99a level...
متن کاملPLGA-based dual targeted nanoparticles enhance miRNA transfection efficiency in hepatic carcinoma
Hepatic carcinoma (HCC) is a lethal disease associated with high morbidity and poor prognosis. Recently years, gene therapies have offered novel modalities to improve the prognosis of HCC patients. MicroRNA-99a (miR-99a) is frequently down-regulated in HCC, where it acts as a tumor suppressor. Therefore, we constructed monomethoxy (polyethylene glycol)-poly(D,L-lactide-co-glycolide)-poly(L-lysi...
متن کامل