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Chen Y, Tsai YH, Tseng BJ, Pan HY, Tseng SH. Suppression of miR-19b enhanced the cytotoxic effects of mTOR inhibitors in human neuroblastoma cells. J Pediatr Surg 2016; 51:1818-1825. [PMID: 27492819 DOI: 10.1016/j.jpedsurg.2016.07.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2016] [Revised: 07/08/2016] [Accepted: 07/10/2016] [Indexed: 12/27/2022]
Abstract
BACKGROUND Mammalian target of rapamycin (mTOR) inhibitors exert significant antitumor effects on several cancer cell types. In this study, we investigated the effects of mTOR inhibitors, in particular the regulation of the microRNA, in neuroblastoma cells. METHODS AZD8055 (a new mTOR inhibitor)- or rapamycin-induced cytotoxic effects on neuroblastoma cells were studied. Western blotting was used to investigate the expression of various proteins in the mTOR pathway. MicroRNA precursors and antagomirs were transfected into cells to manipulate the expression of target microRNA. RESULTS AZD8055 exerted stronger cytotoxic effects than rapamycin in neuroblastoma cells (p<0.03). In addition, AZD8055 suppressed the mTOR pathway and increased the expression of phosphatase and tensin homolog deleted on chromosome 10 (PTEN) in the neuroblastoma cells. AZD8055 significantly decreased miR-19b expression (p<0.005); in contrast, rapamycin increased miR-19b expression (p<0.05). Transfection of miR-19b antagomir into the neuroblastoma cells mimicked the effects of AZD8055 treatment, whereas miR-19b overexpression reversed the effects of AZD8055. Combination of miR-19b knockdown and rapamycin treatment significantly improved the sensitivity of neuroblastoma cells to rapamycin (p<0.02). CONCLUSION Suppression of miR-19b may enhance the cytotoxic effects of mTOR inhibitors in neuroblastoma cells.
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Affiliation(s)
- Yun Chen
- Department of Surgery, Far Eastern Memorial Hospital, Pan-Chiao, New Taipei, Taiwan; Department of Chemical Engineering and Materials Science, Yuan Ze University, Chung-Li, Taoyuan, Taiwan
| | - Ya-Hui Tsai
- Department of Surgery, Far Eastern Memorial Hospital, Pan-Chiao, New Taipei, Taiwan; Department of Chemical Engineering and Materials Science, Yuan Ze University, Chung-Li, Taoyuan, Taiwan.
| | - Bor-Jiun Tseng
- Department of Surgery, Far Eastern Memorial Hospital, Pan-Chiao, New Taipei, Taiwan
| | - Hsin-Yen Pan
- Department of Surgery, Far Eastern Memorial Hospital, Pan-Chiao, New Taipei, Taiwan; Department of Chemical Engineering and Materials Science, Yuan Ze University, Chung-Li, Taoyuan, Taiwan
| | - Sheng-Hong Tseng
- Department of Surgery, National Taiwan University Hospital, and National Taiwan University College of Medicine, Taipei, Taiwan.
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Abstract
The phosphatase and tensin homolog gene PTEN is one of the most frequently mutated tumor suppressor genes in human cancer. Loss of PTEN function occurs in a variety of human cancers via its mutation, deletion, transcriptional silencing, or protein instability. PTEN deficiency in cancer has been associated with advanced disease, chemotherapy resistance, and poor survival. Impaired PTEN function, which antagonizes phosphoinositide 3-kinase (PI3K) signaling, causes the accumulation of phosphatidylinositol (3,4,5)-triphosphate and thereby the suppression of downstream components of the PI3K pathway, including the protein kinase B and mammalian target of rapamycin kinases. In addition to having lipid phosphorylation activity, PTEN has critical roles in the regulation of genomic instability, DNA repair, stem cell self-renewal, cellular senescence, and cell migration. Although PTEN deficiency in solid tumors has been studied extensively, rare studies have investigated PTEN alteration in lymphoid malignancies. However, genomic or epigenomic aberrations of PTEN and dysregulated signaling are likely critical in lymphoma pathogenesis and progression. This review provides updated summary on the role of PTEN deficiency in human cancers, specifically in lymphoid malignancies; the molecular mechanisms of PTEN regulation; and the distinct functions of nuclear PTEN. Therapeutic strategies for rescuing PTEN deficiency in human cancers are proposed.
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Affiliation(s)
- Xiaoxiao Wang
- Department of Hematopathology, The University of Texas M. D. Anderson Cancer Center, Houston, TX 77230, USA.,Department of Medical Oncology, Sun Yat-Sen University Cancer Center, Guangzhou, Guangdong, China
| | - Huiqiang Huang
- Department of Medical Oncology, Sun Yat-Sen University Cancer Center, Guangzhou, Guangdong, China
| | - Ken H Young
- Department of Hematopathology, The University of Texas M. D. Anderson Cancer Center, Houston, TX 77230, USA.,The University of Texas Graduate School of Biomedical Science, Houston, TX 77230, USA
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Yin Z, Ding H, He E, Chen J, Li M. Up-regulation of microRNA-491-5p suppresses cell proliferation and promotes apoptosis by targeting FOXP4 in human osteosarcoma. Cell Prolif 2016; 50. [PMID: 27704627 DOI: 10.1111/cpr.12308] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Accepted: 09/03/2016] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND AND OBJECTIVES MicroRNAs are small non-coding RNAs involved in pathogenesis and progression of human malignancies. MicroRNA-491-5p (miR-491-5p) is down-regulated in many human cancers where it would serve as a tumour suppressor. However, the role played by miR-491-5p in pathogenesis of human osteosarcoma has remained largely unknown. This study has been conducted to examine effects of miR-491-5p on migration and proliferation of cells of the SAOS-2 and MG63 osteosarcoma lines, and mechanisms of those effects. MATERIALS AND METHODS Levels of miR-491-5p expression in osteosarcoma tissues and in human osteosarcoma cell lines were studied using qualitative real-time polymerase chain reaction (qRT-PCR) methods. Cell viability was detected using the CCK-8 and EdU assays, while the transwell assay was used to evaluate migration and invasion. Apoptosis was analysed uing flow cytometry and the Hoechst 33342 nuclear staining method. A dual-luciferase reporter system was used to confirm the target gene of miR-491-5p. The electrophoretic mobility shift assay (EMSA) with DIG-labelled double-stranded FOXP4 oligonucleotides was used to confirm whether or not miR-491-5p suppressed FOXP4 activation. RESULTS Cells of osteosarcoma tissues and cell lines had low levels of miR-491-5p expression, but high levels of forkhead-box P4 (FOXP4) expression. Transfection of SAOS-2 and MG63 cells with miR-491-5p mimics inhibited expression of FOXP4 protein, which suppressed cell growth and migration, but induced apoptosis. Dual-luciferase reporter assays confirmed FOXP4 as the target gene for miR-491-5p. Overexpression of miR-491-5p suppressed FOXP4 activity in SAOS-2 and MG63 cells. Knockdown of FOXP4 in SAOS-2 and MG63 cells using an RNAi strategy resulted in reduced levels of cell proliferation and migration, but increased levels of apoptosis. CONCLUSION Our in vitro studies showed that up-regulation of miR-491-5p suppressed proliferation of the human osteosarcoma cells and induced apoptosis by targeting FOXP4. These findings suggest that miR-491-5p could be further studied as a potential clinical diagnostic or predictive biomarker for human osteosarcoma.
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Affiliation(s)
- Zhixun Yin
- Department of Orthopaedic Surgery, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Hongmei Ding
- Department of Anatomy, Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Erxing He
- Department of Orthopaedic Surgery, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Jingchen Chen
- Department of Orthopaedic Surgery, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Ming Li
- Department of Orthopaedic Surgery, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
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Erdmann K, Kaulke K, Rieger C, Salomo K, Wirth MP, Fuessel S. MiR-26a and miR-138 block the G1/S transition by targeting the cell cycle regulating network in prostate cancer cells. J Cancer Res Clin Oncol 2016; 142:2249-61. [PMID: 27562865 DOI: 10.1007/s00432-016-2222-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Accepted: 08/20/2016] [Indexed: 11/25/2022]
Abstract
PURPOSE The tumor-suppressive microRNAs miR-26a and miR-138 are significantly down-regulated in prostate cancer (PCa) and have been identified as direct regulators of enhancer of zeste homolog 2 (EZH2), which is a known oncogene in PCa. In the present study, the influence of miR-26a and miR-138 on EZH2 and cellular function including the impact on the cell cycle regulating network was evaluated in PCa cells. METHODS PC-3 and DU-145 PCa cells were transfected with 100 nM of miRNA mimics, siRNA against EZH2 (siR-EZH2) or control constructs for 4 h. Analyses of gene expression and cellular function were conducted 48 h after transfection. RESULTS Both miRNAs influenced the EZH2 expression and activity only marginally, whereas siR-EZH2 led to a notable decrease of the EZH2 expression and activity. Both miRNAs inhibited short- and/or long-term proliferation of PCa cells but showed no effect on viability and apoptosis. In PC-3 cells, miR-26a and miR-138 caused a significant surplus of cells in the G0/G1 phase of 6 and 12 %, respectively, thus blocking the G1/S-phase transition. Treatment with siR-EZH2 was without substantial influence on cellular function and cell cycle. Therefore, alternative target genes involved in cell cycle regulation were identified in silico. MiR-26a significantly diminished the expression of its targets CCNE1, CCNE2 and CDK6, whereas CCND1, CCND3 and CDK6 were suppressed by their regulator miR-138. CONCLUSIONS The present findings suggest an anti-proliferative role for miR-26a and miR-138 in PCa by blocking the G1/S-phase transition independent of EZH2 but via a concerted inhibition of crucial cell cycle regulators.
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Affiliation(s)
- Kati Erdmann
- Department of Urology, Technische Universität Dresden, Fetscherstr. 74, 01307, Dresden, Germany.
| | - Knut Kaulke
- Department of Urology, Technische Universität Dresden, Fetscherstr. 74, 01307, Dresden, Germany
| | - Christiane Rieger
- Department of Urology, Technische Universität Dresden, Fetscherstr. 74, 01307, Dresden, Germany
| | - Karsten Salomo
- Department of Urology, Technische Universität Dresden, Fetscherstr. 74, 01307, Dresden, Germany
| | - Manfred P Wirth
- Department of Urology, Technische Universität Dresden, Fetscherstr. 74, 01307, Dresden, Germany
| | - Susanne Fuessel
- Department of Urology, Technische Universität Dresden, Fetscherstr. 74, 01307, Dresden, Germany
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Lin Z, Zhao J, Wang X, Zhu X, Gong L. Overexpression of microRNA-497 suppresses cell proliferation and induces apoptosis through targeting paired box 2 in human ovarian cancer. Oncol Rep 2016; 36:2101-7. [PMID: 27513319 DOI: 10.3892/or.2016.5012] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 03/22/2016] [Indexed: 11/05/2022] Open
Abstract
MicroRNAs are a class of endogenous, small non-coding RNAs which are tightly involved in evolution and progression of human cancers. MicroRNA-497 has been reported as tumor-suppressor in various human cancer. However, the role of miR-497 in ovarian cancer is still poorly known. We investigated the expression level and cellular function of miR-497 in human ovarian cancer. In this study, the expression of miR-497 in ovarian cancer tissues and SKOV3 cells was detected by quantitative reverse‑transcription polymerase chain reaction (qRT-PCR). CCK-8 assay was used to analysis the cell proliferation. Transwell assay was performed to analysis cell migration and invasion. Cell apoptosis was evaluated by flow cytometry. Luciferase assay was performed to verify a putative target site of miR-497 in the 3'UTR of PAX2 mRNA. The results showed that miR-497 was markedly decreased in ovarian cancer tissues and SKOV3 cells. Moreover, overexpression of miR-497 in SKOV3 cells induced PAX2 protein expression and resulted in inhibition of cell proliferation, migration and invasion, and induction of cell apoptosis. In addition, we confirmed that PAX2 is a direct target gene of miR-497. Furthermore, Silencing of PAX2 by RNA interference suppressed cell proliferation and promoted cell apoptosis in vitro. Taken together, our study rationally present that miR-497 has a potential role as a useful diagnostic and therapeutic biomarker for human ovarian cancer.
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Affiliation(s)
- Zhong Lin
- Hepatobiliary and Enteric Surgery Research Center, Xiangya Hospital, Central South University, Changsha, Hunan, P.R. China
| | - Junling Zhao
- Department of Gynaecology, Ruikang Hospital Affiliated to Guangxi University of Chinese Medicine, Nanning, Guangxi, P.R. China
| | - Xindan Wang
- Department of Gynaecology, Liuzhou Maternity and Child Healthcare Hospital, Liuzhou, Guangxi, P.R. China
| | - Xuehong Zhu
- Department of Gynaecology, Ruikang Hospital Affiliated to Guangxi University of Chinese Medicine, Nanning, Guangxi, P.R. China
| | - Liansheng Gong
- Hepatobiliary and Enteric Surgery Research Center, Xiangya Hospital, Central South University, Changsha, Hunan, P.R. China
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Roy R, Singh R, Chattopadhyay E, Ray A, Sarkar ND, Aich R, Paul RR, Pal M, Roy B. MicroRNA and target gene expression based clustering of oral cancer, precancer and normal tissues. Gene 2016; 593:58-63. [PMID: 27515006 DOI: 10.1016/j.gene.2016.08.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 08/02/2016] [Accepted: 08/05/2016] [Indexed: 12/26/2022]
Abstract
PURPOSE Development of oral cancer is usually preceded by precancerous lesion. Despite histopathological diagnosis, development of disease specific biomarkers continues to be a promising field of study. Expression of miRNAs and their target genes was studied in oral cancer and two types of precancer lesions to look for disease specific gene expression patterns. METHODS Expression of miR-26a, miR-29a, miR-34b and miR-423 and their 11 target genes were determined in 20 oral leukoplakia, 20 lichen planus and 20 cancer tissues with respect to 20 normal tissues using qPCR assay. Expression data were, then, used for cluster analysis of normal as well as disease tissues. RESULTS Expression of miR-26a and miR-29a was significantly down regulated in leukoplakia and cancer tissues but up regulated in lichen planus tissues. Expression of target genes such as, ADAMTS7, ATP1B1, COL4A2, CPEB3, CDK6, DNMT3a and PI3KR1 was significantly down regulated in at least two of three disease types with respect to normal tissues. Negative correlations between expression levels of miRNAs and their targets were observed in normal tissues but not in disease tissues implying altered miRNA-target interaction in disease state. Specific expression profile of miRNAs and target genes formed separate clusters of normal, lichen planus and cancer tissues. CONCLUSION Our results suggest that alterations in expression of selected miRNAs and target genes may play important roles in development of precancer to cancer. Expression profiles of miRNA and target genes may be useful to differentiate cancer and lichen planus from normal tissues, thereby bolstering their role in diagnostics.
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Affiliation(s)
- Roshni Roy
- Human Genetics Unit, Indian Statistical Institute, 203 B. T. Road, Kolkata 700108, India
| | - Richa Singh
- Human Genetics Unit, Indian Statistical Institute, 203 B. T. Road, Kolkata 700108, India
| | - Esita Chattopadhyay
- Human Genetics Unit, Indian Statistical Institute, 203 B. T. Road, Kolkata 700108, India
| | - Anindita Ray
- Human Genetics Unit, Indian Statistical Institute, 203 B. T. Road, Kolkata 700108, India
| | - Navonil De Sarkar
- Human Genetics Unit, Indian Statistical Institute, 203 B. T. Road, Kolkata 700108, India
| | - Ritesh Aich
- Human Genetics Unit, Indian Statistical Institute, 203 B. T. Road, Kolkata 700108, India; Department of Oral Pathology, Guru Nanak Institute of Dental Science & Research, 157/F Nilganj Road, Kolkata 700114, India
| | - Ranjan Rashmi Paul
- Human Genetics Unit, Indian Statistical Institute, 203 B. T. Road, Kolkata 700108, India; Department of Oral Pathology, Guru Nanak Institute of Dental Science & Research, 157/F Nilganj Road, Kolkata 700114, India
| | - Mousumi Pal
- Human Genetics Unit, Indian Statistical Institute, 203 B. T. Road, Kolkata 700108, India; Department of Oral Pathology, Guru Nanak Institute of Dental Science & Research, 157/F Nilganj Road, Kolkata 700114, India
| | - Bidyut Roy
- Human Genetics Unit, Indian Statistical Institute, 203 B. T. Road, Kolkata 700108, India.
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Huang T, She K, Peng G, Wang W, Huang J, Li J, Wang Z, He J. MicroRNA-186 suppresses cell proliferation and metastasis through targeting MAP3K2 in non-small cell lung cancer. Int J Oncol 2016; 49:1437-44. [PMID: 27498924 DOI: 10.3892/ijo.2016.3637] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Accepted: 06/22/2016] [Indexed: 11/05/2022] Open
Abstract
MicroRNAs are a class of small endogenous non-coding RNAs that play crucial roles in the initiation and progression of human cancers. miR-186 was found decreased in various human malignancies and function as a tumor suppressor. However, the regulating mechanism of miR-186 in growth and metastasis of human non-small cell lung cancer (NSCLC) is still poorly understood. We investigated the role of miR-186 in the growth and metastasis of human NSCLC. In the present study, we found that miR-186 was significantly decreased in lung cancer tissues and cells. Furthermore, overexpression of miR-186 suppressed lung cancer cell proliferation, migration and invasion, and induced cell apoptosis. Moreover, we found that confirmed mitogen-activated protein kinase kinase kinase 2 (MAP3K2) protein was increased in lung cancer tissues and confirmed that MAP3K2 is a target gene of miR-186. In addition, knockdown of MAP3K2 by RNA interference inhibited lung cancer cell proliferation, migration and invasion, and promoted cell apoptosis in vitro. Furthermore, we observed tthat the overexpression of MAP3K2 partially reversed the inhibitory effect of miR-186 on the proliferation and metastasis of A549 and HCC827 cell lines. Taken together, our data indicated that miR-186 regulates lung cancer growth and metastasis through suppressing MAP3K2 expression, at least partly. Therefore, miR-186-MAP3K2 may represent a new and useful potential clinical treatment and diagnosis target for NSCLC.
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Affiliation(s)
- Tonghai Huang
- Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Kelin She
- Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Guilin Peng
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510120, P.R. China
| | - Wei Wang
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510120, P.R. China
| | - Jun Huang
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510120, P.R. China
| | - Jingpei Li
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510120, P.R. China
| | - Zheng Wang
- Department of Thoracic Surgery, Shenzhen People's Hospital, Shenzhen, Guangdong 518020, P.R. China
| | - Jianxing He
- Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
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Loss of miR-26a-5p promotes proliferation, migration, and invasion in prostate cancer through negatively regulating SERBP1. Tumour Biol 2016; 37:12843-12854. [PMID: 27449037 DOI: 10.1007/s13277-016-5158-z] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Accepted: 07/12/2016] [Indexed: 01/07/2023] Open
Abstract
The biological role of miR-26a involved in the carcinogenesis of prostate cancer (PC) has been controversial. Besides, the underlying mechanism by which miR-26a plays a role in PC has been unclear. To investigate the role of miR-26a-5p in the PC, miR-26a-5p was detected and statistically analyzed in clinical PC tissues and a panel of PC cell lines. Using bioinformatics analysis, we found that serpine1 messenger RNA (mRNA) binding protein 1 (SERBP1) was a potential downstream target of miR-26a-5p. Using luciferase reporter and western blot, we identified that miR-26a-5p negatively regulated SERBP1 on the PC cell line level. It was confirmed that miR-26a-5p was markedly downregulated in PC tissues compared with normal controls whose reduced expression was significantly associated with metastasis and poor overall prognosis and found that miR-26a-5p was able to prevent proliferation and motility of PC cells in vitro. Additionally, SERBP1 was identified as a downstream target of miR-26a-5p. Moreover, it was observed that SERBP1 was markedly upregulated in prostate cancer tissues and was significantly associated with tissue metastasis and Gleason score. Taken together, our results for the first time demonstrate that the loss of miR-26a-5p promotes proliferation, migration, and invasion through targeting SERBP1 in PC, supporting the tumor-suppressing role of miR-26a-5p in PC.
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Chang Y, Dai DH, Li Y, Zhang Y, Zhang M, Zhou GB, Zeng CJ. Differences in the expression of microRNAs and their predicted gene targets between cauda epididymal and ejaculated boar sperm. Theriogenology 2016; 86:2162-2171. [PMID: 27527406 DOI: 10.1016/j.theriogenology.2016.07.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Revised: 07/12/2016] [Accepted: 07/12/2016] [Indexed: 01/27/2023]
Abstract
Mammalian spermatozoa gradually mature and acquire fertility during the transition from the testis to the caput and cauda epididymis, after which they are stored at the tail of the epididymis and the ampulla of vas deferens. During ejaculation, mixing of spermatozoa with the secretions of accessory sex glands leads to their dilution and changes in their function. Although remarkable progress has been made toward the understanding of changes in spermatozoa biochemistry and function before and after ejaculation, it is unknown whether microRNAs (miRNAs) are involved in regulating the function of spermatozoa during the transition between the cauda epididymis and ejaculation. In this study, 48 miRNAs were selected for analysis on the basis of their potential involvement in spermatogenesis, sperm maturation, and quality parameters markers. The differential expression levels of these 48 miRNAs between the caudal epididymis and fresh ejaculates of boar spermatozoa were determined. We found that 15 miRNAs were significantly differentially expressed (eight downregulated and seven upregulated) between boar cauda epididymal and fresh spermatozoa. Five miRNAs hypothesized to be involved in sperm apoptosis were further tested to demonstrate their influence over the expression of their target mRNAs using quantitative reverse-transcription polymerase chain reaction. Together, our findings suggest that these differentially expressed miRNAs are associated with the functional regulation of spermatozoa between cauda epididymis and ejaculation.
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Affiliation(s)
- Yu Chang
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan Province, P. R. China
| | - Ding-Hui Dai
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan Province, P. R. China
| | - Yuan Li
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan Province, P. R. China
| | - Yan Zhang
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan Province, P. R. China
| | - Ming Zhang
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan Province, P. R. China
| | - Guang-Bin Zhou
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan Province, P. R. China
| | - Chang-Jun Zeng
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan Province, P. R. China.
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Comparative Study of Extracellular Vesicles from the Urine of Healthy Individuals and Prostate Cancer Patients. PLoS One 2016; 11:e0157566. [PMID: 27305142 PMCID: PMC4909321 DOI: 10.1371/journal.pone.0157566] [Citation(s) in RCA: 115] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Accepted: 06/01/2016] [Indexed: 01/29/2023] Open
Abstract
Recent studies suggest that extracellular vesicles may be the key to timely diagnosis and monitoring of genito-urological malignancies. In this study we investigated the composition and content of extracellular vesicles found in the urine of healthy donors and prostate cancer patients. Urine of 14 PCa patients and 20 healthy volunteers was clarified by low-speed centrifugation and total extracellular vesicles fraction was obtain by high-speed centrifugation. The exosome-enriched fraction was obtained by filtration of total extracellular vesicles through a 0.1 μm pore filter. Transmission electron microscopy showed that cell-free urine in both groups contained vesicles from 20 to 230 nm. Immunogold staining after ultrafiltration demonstrated that 95% and 90% of extracellular vesicles in healthy individuals and cancer patients, respectively, were exosomes. Protein, DNA and RNA concentrations as well as size distribution of extracellular vesicles in both fractions were analyzed. Only 75% of the total protein content of extracellular vesicles was associated with exosomes which amounted to 90–95% of all vesicles. Median DNA concentrations in total extracellular vesicles and exosome-enriched fractions were 18 pg/ml and 2.6 pg/ml urine, correspondingly. Urine extracellular vesicles carried a population of RNA molecules 25 nt to 200 nt in concentration of no more than 290 pg/ml of urine. Additionally, concentrations of miR-19b, miR-25, miR-125b, and miR-205 were quantified by qRT-PCR. MiRNAs were shown to be differently distributed between different fractions of extracellular vesicles. Detection of miR-19b versus miR-16 in total vesicles and exosome-enriched fractions achieved 100%/93% and 95%/79% specificity/sensitivity in distinguishing cancer patients from healthy individuals, respectively, demonstrating the diagnostic value of urine extracellular vesicles.
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Dhondt B, Rousseau Q, De Wever O, Hendrix A. Function of extracellular vesicle-associated miRNAs in metastasis. Cell Tissue Res 2016; 365:621-41. [DOI: 10.1007/s00441-016-2430-x] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Accepted: 05/07/2016] [Indexed: 01/08/2023]
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Kojima S, Goto Y, Naya Y. The roles of microRNAs in the progression of castration-resistant prostate cancer. J Hum Genet 2016; 62:25-31. [PMID: 27278789 DOI: 10.1038/jhg.2016.69] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2016] [Revised: 04/28/2016] [Accepted: 05/10/2016] [Indexed: 02/06/2023]
Abstract
Prostate cancer (PCa) is one of the leading causes of cancer-related death in men. PCa is androgen-dependent, and androgen-deprivation therapy is effective for first-line hormonal treatment, but the androgen-independent phenotype of PCa eventually develops, which is difficult to treat and has no effective cure. Recently, microRNAs have been discovered to have important roles in the initiation and progression of PCa, suggesting their use in diagnosis, predicting prognosis and development of treatment for castration-resistant PCa (CRPC). Understanding the networks of microRNAs and their target genes is necessary to ascertain their roles and importance in the development and progression of PCa. This review summarizes the current knowledge about microRNAs regulating PCa progression and elucidates the mechanism of progression to CRPC.
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Affiliation(s)
- Satoko Kojima
- Department of Urology, Teikyo University Chiba Medical Center, Ichihara, Japan
| | - Yusuke Goto
- Department of Functional Genomics, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Yukio Naya
- Department of Urology, Teikyo University Chiba Medical Center, Ichihara, Japan
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Wang P, Henning SM, Magyar CE, Elshimali Y, Heber D, Vadgama JV. Green tea and quercetin sensitize PC-3 xenograft prostate tumors to docetaxel chemotherapy. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2016; 35:73. [PMID: 27151407 PMCID: PMC4858851 DOI: 10.1186/s13046-016-0351-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 04/28/2016] [Indexed: 01/07/2023]
Abstract
Background Chemotherapy with docetaxel (Doc) remains the standard treatment for metastatic and castration-resistance prostate cancer (CRPC). However, the clinical success of Doc is limited by its chemoresistance and side effects. This study investigated whether natural products green tea (GT) and quercetin (Q) enhance the therapeutic efficacy of Doc in CRPC in mouse models. Methods Male severe combined immunodeficiency (SCID) mice (n = 10 per group) were inoculated with androgen-independent prostate cancer PC-3 cells subcutaneously. When tumors were established the intervention started. Mice were administered with GT + Q, Doc 5 mg/kg (LD), GT + Q + LD Doc, Doc 10 mg/kg (HD) or control. The concentration of GT polyphenols in brewed tea administered as drinking water was 0.07 % and Q was supplemented in diet at 0.4 %. Doc was intravenously injected weekly for 4 weeks, GT and Q given throughout the study. Results GT + Q or LD Doc slightly inhibited tumor growth compared to control. However, the combination of GT and Q with LD Doc significantly enhanced the potency of Doc 2-fold and reduced tumor growth by 62 % compared to LD Doc in 7-weeks intervention. A decrease of Ki67 and increase of cleaved caspase 7 were observed in tumors by the mixture, along with lowered blood concentrations of growth factors like VEGF and EGF. The mixture significantly elevated the levels of tumor suppressor mir15a and mir330 in tumor tissues. An increased risk of liver toxicity was only observed with HD Doc treatment. Conclusions These results provide a promising regimen to enhance the therapeutic effect of Doc in a less toxic manner.
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Affiliation(s)
- Piwen Wang
- Division of Cancer Research and Training, Charles R. Drew University of Medicine and Science, Los Angeles, CA, 90059, USA. .,Center for Human Nutrition, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA, 90095, USA.
| | - Susanne M Henning
- Center for Human Nutrition, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA, 90095, USA
| | - Clara E Magyar
- Department of Pathology, David Geffen School of Medicine, University of California, Los Angeles, CA, 90095, USA
| | - Yahya Elshimali
- Division of Cancer Research and Training, Charles R. Drew University of Medicine and Science, Los Angeles, CA, 90059, USA
| | - David Heber
- Center for Human Nutrition, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA, 90095, USA
| | - Jaydutt V Vadgama
- Division of Cancer Research and Training, Charles R. Drew University of Medicine and Science, Los Angeles, CA, 90059, USA.,Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA, 90095, USA
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Prognostic value of ERG, PTEN, CRISP3 and SPINK1 in predicting biochemical recurrence in prostate cancer. Oncol Lett 2016; 11:3621-3630. [PMID: 27284364 PMCID: PMC4887942 DOI: 10.3892/ol.2016.4459] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 03/15/2016] [Indexed: 11/18/2022] Open
Abstract
The established prognostic factors associated with prostatic adenocarcinoma are the Gleason score, pathological T staging and serum prostatic-specific antigen (PSA) level. However, these prognostic factors alone are not sufficient for predicting prognostic characteristics, including early stage or advanced prostate cancer, presence of metastasis or disease-related mortality. The purpose of the present study was to simultaneously evaluate the prognostic value and associations of four biomarkers, namely, transcriptional regulator ERG (ERG), phosphatase and tensin homolog (PTEN), cysteine-rich secretory protein 3 (CRISP3) and serine protease inhibitor Kazal type I (SPINK1), and to conduct risk stratification of prostate cancer for use in patient management. A total of 68 formalin-fixed, paraffin-embedded, prostate cancer samples from radical prostatectomies were obtained in the Kyung Hee University Hospital (Seoul, Korea) and were studied immunohistochemically for ERG, PTEN, CRISP3 and SPINK1 to determine the proportion and intensity of staining. SPINK1 expression was mutually exclusive of ERG expression (P=0.001). The loss of PTEN and high CRISP3 expression are unfavorable indicators for prostate cancer, as PTEN loss was associated with shorter biochemical recurrence (BCR) (P=0.039), and high CRISP3 expression was associated with increased BCR (P<0.001) and cancer-related mortalities (P=0.011). Using the combination of low PTEN and high CRISP3 expression enables attention to be focused on patients who exhibit a poor prognosis. Subgrouping of patients, into high-risk and low-risk categories, was correlated with BCR-free survival in prostate cancer upon multivariate analysis (P=0.030). Overall, low PTEN and high CRISP3 expression significantly characterize the subgroups of prostate cancer that have a poor prognosis for BCR.
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Stuopelytė K, Daniūnaitė K, Jankevičius F, Jarmalaitė S. Detection of miRNAs in urine of prostate cancer patients. Medicina (B Aires) 2016; 52:116-24. [DOI: 10.1016/j.medici.2016.02.007] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Revised: 02/23/2016] [Accepted: 02/29/2016] [Indexed: 11/25/2022] Open
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CancerNet: a database for decoding multilevel molecular interactions across diverse cancer types. Oncogenesis 2015; 4:e177. [PMID: 26690544 PMCID: PMC4688397 DOI: 10.1038/oncsis.2015.40] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Revised: 09/21/2015] [Accepted: 10/15/2015] [Indexed: 02/08/2023] Open
Abstract
Protein–protein interactions (PPIs) and microRNA (miRNA)–target interactions are important for deciphering the mechanisms of tumorigenesis. However, current PPI databases do not support cancer-specific analysis. Also, no available databases can be used to retrieve cancer-associated miRNA–target interactions. As the pathogenesis of human cancers is affected by several miRNAs rather than a single miRNA, it is needed to uncover miRNA synergism in a systems level. Here for each cancer type, we constructed a miRNA–miRNA functionally synergistic network based on the functions of miRNA targets and their topological features in that cancer PPI network. And for the first time, we report the cancer-specific database CancerNet (http://bis.zju.edu.cn/CancerNet), which contains information about PPIs, miRNA–target interactions and functionally synergistic miRNA–miRNA pairs across 33 human cancer types. In addition, PPI information across 33 main normal tissues and cell types are included. Flexible query methods are allowed to retrieve cancer molecular interactions. Network viewer can be used to visualize interactions that users are interested in. Enrichment analysis tool was designed to detect significantly overrepresented Gene Ontology categories of miRNA targets. Thus, CancerNet serves as a comprehensive platform for assessing the roles of proteins and miRNAs, as well as their interactions across human cancers.
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Song L, Xie X, Yu S, Peng F, Peng L. MicroRNA‑126 inhibits proliferation and metastasis by targeting pik3r2 in prostate cancer. Mol Med Rep 2015; 13:1204-10. [PMID: 26677064 PMCID: PMC4732865 DOI: 10.3892/mmr.2015.4661] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2015] [Accepted: 11/10/2015] [Indexed: 12/21/2022] Open
Abstract
The dysregulation of miR-126 has been reported to correlate with the progression of several cancer types. The present study demonstrated that miR-126 was significantly downregulated in prostate cancer (PCa) tissues compared with normal prostate tissues. In vitro and in vivo studies indicated that forced overexpression of miR-126 significantly suppressed the proliferation of PCa cell lines. Additionally, a Transwell assay showed that enhanced expression of miR-126 inhibited metastasis in PCa in vitro. Furthermore, pik3r2 was confirmed to be a direct target of miR-126 in PCa. It was also shown that pik3r2 was upregulated in PCa tissues and this inversely correlated with miR-126 in PCa tissues. In conclusion, these results revealed that aberrant expression of miR-126 promoted the progression of PCa and may serve as a novel therapeutic biomarker for PCa.
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Affiliation(s)
- Lei Song
- Department of Urological Organ Transplantation, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
| | - Xubio Xie
- Department of Urological Organ Transplantation, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
| | - Shaojie Yu
- Department of Urological Organ Transplantation, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
| | - Fenghua Peng
- Department of Urological Organ Transplantation, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
| | - Longkai Peng
- Department of Urological Organ Transplantation, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
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miR-26a and miR-214 down-regulate expression of the PTEN gene in chronic lymphocytic leukemia, but not PTEN mutation or promoter methylation. Oncotarget 2015; 6:1276-85. [PMID: 25361012 PMCID: PMC4359232 DOI: 10.18632/oncotarget.2626] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Accepted: 10/23/2014] [Indexed: 12/16/2022] Open
Abstract
We previous found the expression level of PTEN was low in the chronic lymphocytic leukemia (CLL) patients. To assess the pathogenic contribution of the low expression of PTEN, we determined PTEN-regulating miRNA interference, PTEN promoter methylation and PTEN gene mutation condition in CLL. One hundred and fifty-four previously untreated CLL patients and 200 cases of healthy controls were sequenced in exons 5−9 of PTEN. None of single nucleotide polymorphism site or mutation was detected in the coding sequences of those exons. Methylation of PTEN promoter was found in one (1.33%) of the 75 patients with CLL, but none of the 25 age-matched control subjects. We found that PTEN was a potential target of miR-26a and miR-214, which had been confirmed following dual-luciferase reporter assays, reverse transcription polymerase chain reaction and Western blotting. High expression of miR-26a was associated with advanced Binet stage (P=0.012), p53 aberrations (P=0.014) and inferior time to first treatment (P=0.038), and high expression of miR-214 was only associated with p53 aberrations (P=0.041). Inhibition of miR-26a or miR-214 could induce more apoptosis in primary cultured CLL cells. These findings support miR-26a and miR-214 down-regulate expression of PTEN in CLL, but not PTEN mutation or promoter methylation.
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Fang Y, Xu C, Fu Y. MicroRNA-17-5p induces drug resistance and invasion of ovarian carcinoma cells by targeting PTEN signaling. ACTA ACUST UNITED AC 2015; 22:12. [PMID: 26500892 PMCID: PMC4619013 DOI: 10.1186/s40709-015-0035-2] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Accepted: 10/12/2015] [Indexed: 11/18/2022]
Abstract
Background The miR-17-5p was overexpressed in ovarian cancer cells, and those cells were treated with paclitaxel. The proliferation of ovarian cancer cells was assessed by MTT assay. The Caspase-Glo3/7 and TUNEL assay were used to examine the effect of miR-17-5p on paclitaxel-induced apoptosis in ovarian cancer cells. The migration and invasion of ovarian cancer cells were analyzed by BD matrigel assays. Western blot was performed to evaluate the expression of apoptotic proteins and epithelial-mesenchymal transition markers in ovarian cancer cells. Results The survival rate of ovarian cancer cells was increased after overexpression of miR-17-5p. The apoptosis decreased in miR-17-5p overexpressed ovarian cancer cells. Altered miR-17-5p expression affected migration and invasion of ovarian cancer cells. The overexpression of miR-17-5p altered the expression of EMT markers. miR-17-5p activates AKT by downregulation of PTEN in ovarian cancer cells. Conclusion Our results indicate that miR-17-5p might serve as potential molecular therapeutic target.
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Affiliation(s)
- Ying Fang
- Department of Gynecology, The First Hospital of Jilin University, Changchun, Jilin People's Republic of China ; Department of Gynecology, No. 208 Hospital of Chinese People's Liberation Army, Changchun, Jilin People's Republic of China
| | - Changyan Xu
- Department of Medical Administration, The First Hospital of Jilin University, Changchun, Jilin People's Republic of China
| | - Yan Fu
- Department of Gynecology, The First Hospital of Jilin University, Changchun, Jilin People's Republic of China
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Cowley D, Pandya K, Khan I, Kerwin J, Owen K, Griner E. Registered report: A coding-independent function of gene and pseudogene mRNAs regulates tumour biology. eLife 2015; 4. [PMID: 26335297 PMCID: PMC4558562 DOI: 10.7554/elife.08245] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Accepted: 08/08/2015] [Indexed: 01/04/2023] Open
Abstract
The Reproducibility Project: Cancer Biology seeks to address growing concerns about reproducibility in scientific research by conducting replications of selected experiments from a number of high-profile papers in the field of cancer biology. The papers, which were published between 2010 and 2012, were selected on the basis of citations and Altmetric scores (Errington et al., 2014). This Registered report describes the proposed replication plan of key experiments from ‘A coding-independent function of gene and pseudogene mRNAs regulates tumour biology’ by Poliseno et al. (2010), published in Nature in 2010. The key experiments to be replicated are reported in Figures 1D, 2F-H, and 4A. In these experiments, Poliseno and colleagues report microRNAs miR-19b and miR-20a transcriptionally suppress both PTEN and PTENP1 in prostate cancer cells (Figure 1D; Poliseno et al., 2010). Decreased expression of PTEN and/or PTENP1 resulted in downregulated PTEN protein levels (Figure 2H), downregulation of both mRNAs (Figure 2G), and increased tumor cell proliferation (Figure 2F; Poliseno et al., 2010). Furthermore, overexpression of the PTEN 3′ UTR enhanced PTENP1 mRNA abundance limiting tumor cell proliferation, providing additional evidence for the co-regulation of PTEN and PTENP1 (Figure 4A; Poliseno et al., 2010). The Reproducibility Project: Cancer Biology is collaboration between the Center for Open Science and Science Exchange, and the results of the replications will be published in eLife. DOI:http://dx.doi.org/10.7554/eLife.08245.001
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Affiliation(s)
- Dale Cowley
- TransViragen Inc, Chapel Hill, North Carolina
| | | | - Israr Khan
- Alamo Laboratories Inc, San Antonio, Texas
| | - John Kerwin
- Biotechnology Research and Education Program, University of Maryland, College Park, Maryland
| | - Kate Owen
- University of Virginia, Charlottesville, Virginia
| | - Erin Griner
- University of Virginia, Charlottesville, Virginia
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Lozano-Velasco E, Vallejo D, Esteban FJ, Doherty C, Hernández-Torres F, Franco D, Aránega AE. A Pitx2-MicroRNA Pathway Modulates Cell Proliferation in Myoblasts and Skeletal-Muscle Satellite Cells and Promotes Their Commitment to a Myogenic Cell Fate. Mol Cell Biol 2015; 35:2892-909. [PMID: 26055324 PMCID: PMC4525317 DOI: 10.1128/mcb.00536-15] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Revised: 05/28/2015] [Accepted: 05/29/2015] [Indexed: 01/21/2023] Open
Abstract
The acquisition of a proliferating-cell status from a quiescent state as well as the shift between proliferation and differentiation are key developmental steps in skeletal-muscle stem cells (satellite cells) to provide proper muscle regeneration. However, how satellite cell proliferation is regulated is not fully understood. Here, we report that the c-isoform of the transcription factor Pitx2 increases cell proliferation in myoblasts by downregulating microRNA 15b (miR-15b), miR-23b, miR-106b, and miR-503. This Pitx2c-microRNA (miRNA) pathway also regulates cell proliferation in early-activated satellite cells, enhancing Myf5(+) satellite cells and thereby promoting their commitment to a myogenic cell fate. This study reveals unknown functions of several miRNAs in myoblast and satellite cell behavior and thus may have future applications in regenerative medicine.
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Affiliation(s)
- Estefanía Lozano-Velasco
- Cardiac and Skeletal Myogenesis Group, Department of Experimental Biology, University of Jaén, Jaén, Spain
| | - Daniel Vallejo
- Cardiac and Skeletal Myogenesis Group, Department of Experimental Biology, University of Jaén, Jaén, Spain
| | - Francisco J Esteban
- Cardiac and Skeletal Myogenesis Group, Department of Experimental Biology, University of Jaén, Jaén, Spain
| | - Chris Doherty
- Cardiac and Skeletal Myogenesis Group, Department of Experimental Biology, University of Jaén, Jaén, Spain
| | - Francisco Hernández-Torres
- Cardiac and Skeletal Myogenesis Group, Department of Experimental Biology, University of Jaén, Jaén, Spain
| | - Diego Franco
- Cardiac and Skeletal Myogenesis Group, Department of Experimental Biology, University of Jaén, Jaén, Spain
| | - Amelia Eva Aránega
- Cardiac and Skeletal Myogenesis Group, Department of Experimental Biology, University of Jaén, Jaén, Spain
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Gontero P, Marra G, Soria F, Oderda M, Zitella A, Baratta F, Chiorino G, Gregnanin I, Daniele L, Cattel L, Frea B, Brusa P. A randomized double-blind placebo controlled phase I-II study on clinical and molecular effects of dietary supplements in men with precancerous prostatic lesions. Chemoprevention or "chemopromotion"? Prostate 2015; 75:1177-86. [PMID: 25893930 DOI: 10.1002/pros.22999] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Accepted: 03/17/2015] [Indexed: 01/05/2023]
Abstract
BACKGROUND Antioxidants effectiveness in prostate cancer (PCa) chemoprevention has been severely questioned, especially after the recent results of the Selenium and Vitamin E Cancer Prevention Trial. We present the results of a double-blind randomized controlled trial (dbRCT) on the pharmacokinetic, clinical, and molecular activity of dietary supplements containing lycopene, selenium, and green tea catechins (GTCs) in men with multifocal high grade prostatic intraepithelial neoplasia (mHGPIN) and/or atypical small acinar proliferation (ASAP). METHODS From 2009 to 2014, we conducted a dbRCT including 60 patients with primary mHGPIN and/or ASAP receiving daily lycopene 35 mg, selenium 55 µg, and GTCs 600 mg, or placebo for 6 months. Pharmacokinetic analysis were performed with UV-Visible spectrophotometric assay under standard (SC) and accelerated (AC) conditions. Upon plasma lycopene concentrations falling within the expected range (1.2-90 mcg/l) and no side-effects of grade >1, study proceeded to phase II (n = 50). After unblinding of results, eight men (4 per arm, 2 without and 2 with PCa, respectively) were randomly selected and totRNA extracted from "non-pathological" tissues. MicroRNA profiling was performed with the Agilent platform. Raw data processing used R-statistical language and linear models for microarray analysis. RESULTS Samples were stable except for lycopene, showing significant degradation (SC = 56%, AC = 59%) and consequently stabilized under vacuum in a dark packaging. Mean plasmatic lycopene concentration was 1,45 ± 0,4 μM. At 6 months, 53 men underwent re-biopsy and 13 (24.5%) were diagnosed with PCa (supplementation n = 10, placebo n = 3 [P = 0.053]). At a mean 37 months follow-up, 3 additional PCa were found in the placebo group. No significant variations in PSA, IPSS, and PR25 questionnaires were observed. Stronger modulation of miRNAs was present on re-biopsy in the supplementation group compared to the placebo, including: (i) overexpression of miRNAs present in PCa versus non-cancer tissue; (ii) underexpression of miRNAs suppressing PCa proliferation; (iii) detection of 35 miRNAs in PCa patients versus disease-free men, including androgen-regulated miR-125b-5p and PTEN-targeting miR-92a-3p (both upregulated). CONCLUSION Administration of high doses of lycopene, GTCs, and selenium in men harboring HGPIN and/or ASAP was associated with a higher incidence of PCa at re-biopsy and expression of microRNAs implicated in PCa progression at molecular analysis. The use of these supplements should be avoided.
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Affiliation(s)
- Paolo Gontero
- Department of Surgical Sciences, Città della Salute e della Scienza, University of Turin, Turin, Italy
| | - Giancarlo Marra
- Department of Surgical Sciences, Città della Salute e della Scienza, University of Turin, Turin, Italy
| | - Francesco Soria
- Department of Surgical Sciences, Città della Salute e della Scienza, University of Turin, Turin, Italy
| | - Marco Oderda
- Department of Surgical Sciences, Città della Salute e della Scienza, University of Turin, Turin, Italy
| | - Andrea Zitella
- Department of Surgical Sciences, Città della Salute e della Scienza, University of Turin, Turin, Italy
| | - Francesca Baratta
- Department of Scienza e Tecnologia del Farmaco, University of Turin, Turin, Italy
| | - Giovanna Chiorino
- Cancer Genomics Laboratory, Fondazione Edo ed Elvo Tempia, Biella, Italy
| | - Ilaria Gregnanin
- Cancer Genomics Laboratory, Fondazione Edo ed Elvo Tempia, Biella, Italy
| | - Lorenzo Daniele
- Department of Pathology, Città della Salute e della Scienza, University of Turin, Turin, Italy
| | - Luigi Cattel
- Department of Scienza e Tecnologia del Farmaco, University of Turin, Turin, Italy
| | - Bruno Frea
- Department of Surgical Sciences, Città della Salute e della Scienza, University of Turin, Turin, Italy
| | - Paola Brusa
- Department of Scienza e Tecnologia del Farmaco, University of Turin, Turin, Italy
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Bermúdez Brito M, Goulielmaki E, Papakonstanti EA. Focus on PTEN Regulation. Front Oncol 2015; 5:166. [PMID: 26284192 PMCID: PMC4515857 DOI: 10.3389/fonc.2015.00166] [Citation(s) in RCA: 93] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Accepted: 07/07/2015] [Indexed: 12/17/2022] Open
Abstract
The role of phosphatase and tensin homolog on chromosome 10 (PTEN) as a tumor suppressor has been for a long time attributed to its lipid phosphatase activity against PI(3,4,5)P3, the phospholipid product of the class I PI3Ks. Besides its traditional role as a lipid phosphatase at the plasma membrane, a wealth of data has shown that PTEN can function independently of its phosphatase activity and that PTEN also exists and plays a role in the nucleus, in cytoplasmic organelles, and extracellularly. Accumulating evidence has shed light on diverse physiological functions of PTEN, which are accompanied by a complex regulation of its expression and activity. PTEN levels and function are regulated transcriptionally, post-transcriptionally, and post-translationally. PTEN is also sensitive to regulation by its interacting proteins and its localization. Herein, we summarize the current knowledge on mechanisms that regulate the expression and enzymatic activity of PTEN and its role in human diseases.
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Affiliation(s)
- Miriam Bermúdez Brito
- Department of Biochemistry, School of Medicine, University of Crete , Heraklion , Greece
| | - Evangelia Goulielmaki
- Department of Biochemistry, School of Medicine, University of Crete , Heraklion , Greece
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Belair CD, Paikari A, Moltzahn F, Shenoy A, Yau C, Dall'Era M, Simko J, Benz C, Blelloch R. DGCR8 is essential for tumor progression following PTEN loss in the prostate. EMBO Rep 2015. [PMID: 26206718 DOI: 10.15252/embr.201439925] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
In human prostate cancer, the microRNA biogenesis machinery increases with prostate cancer progression. Here, we show that deletion of the Dgcr8 gene, a critical component of this complex, inhibits tumor progression in a Pten-knockout mouse model of prostate cancer. Early stages of tumor development were unaffected, but progression to advanced prostatic intraepithelial neoplasia was severely inhibited. Dgcr8 loss blocked Pten null-induced expansion of the basal-like, but not luminal, cellular compartment. Furthermore, while late-stage Pten knockout tumors exhibit decreased senescence-associated beta-galactosidase activity and increased proliferation, the simultaneous deletion of Dgcr8 blocked these changes resulting in levels similar to wild type. Sequencing of small RNAs in isolated epithelial cells uncovered numerous miRNA changes associated with PTEN loss. Consistent with a Pten-Dgcr8 association, analysis of a large cohort of human prostate tumors shows a strong correlation between Akt activation and increased Dgcr8 mRNA levels. Together, these findings uncover a critical role for microRNAs in enhancing proliferation and enabling the expansion of the basal cell compartment associated with tumor progression following Pten loss.
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Affiliation(s)
- Cassandra D Belair
- The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California - San Francisco, San Francisco, CA, USA Center for Reproductive Sciences, University of California - San Francisco, San Francisco, CA, USA Department of Urology, University of California - San Francisco, San Francisco, CA, USA
| | - Alireza Paikari
- The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California - San Francisco, San Francisco, CA, USA Center for Reproductive Sciences, University of California - San Francisco, San Francisco, CA, USA
| | - Felix Moltzahn
- The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California - San Francisco, San Francisco, CA, USA Department of Urology, University of California - San Francisco, San Francisco, CA, USA
| | - Archana Shenoy
- The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California - San Francisco, San Francisco, CA, USA Department of Urology, University of California - San Francisco, San Francisco, CA, USA
| | - Christina Yau
- Department of Medicine, University of California - San Francisco, San Francisco, CA, USA Buck Institute for Research on Aging, Novato, CA, USA
| | - Marc Dall'Era
- Department of Urology, University of California - San Francisco, San Francisco, CA, USA
| | - Jeff Simko
- Department of Urology, University of California - San Francisco, San Francisco, CA, USA Department of Anatomic Pathology, University of California - San Francisco, San Francisco, CA, USA
| | - Christopher Benz
- Department of Medicine, University of California - San Francisco, San Francisco, CA, USA Buck Institute for Research on Aging, Novato, CA, USA
| | - Robert Blelloch
- The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California - San Francisco, San Francisco, CA, USA Center for Reproductive Sciences, University of California - San Francisco, San Francisco, CA, USA Department of Urology, University of California - San Francisco, San Francisco, CA, USA Department of Anatomic Pathology, University of California - San Francisco, San Francisco, CA, USA
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Wang N, Yao M, Xu J, Quan Y, Zhang K, Yang R, Gao WQ. Autocrine Activation of CHRM3 Promotes Prostate Cancer Growth and Castration Resistance via CaM/CaMKK-Mediated Phosphorylation of Akt. Clin Cancer Res 2015; 21:4676-85. [PMID: 26071486 DOI: 10.1158/1078-0432.ccr-14-3163] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2014] [Accepted: 06/07/2015] [Indexed: 11/16/2022]
Abstract
PURPOSE Although a previous study reported nerve ending-derived acetylcholine promoted prostate cancer invasion and metastasis by regulating the microenvironment of cancer cells, the present study aims to determine whether there is autocrine cholinergic signaling in prostate epithelial cells that promotes prostate cancer growth and castration resistance. EXPERIMENTAL DESIGN In this study, IHC was performed to detect protein expression in mouse prostate tissue sections and human prostate cancer tissue sections. Subcutaneously and orthotopically xenografted tumor models were established to evaluate the functions of autocrine cholinergic signaling in regulating prostate cancer growth and castration resistance. Western blotting analysis was performed to assess the autocrine cholinergic signaling-induced signaling pathway. RESULTS We found the expression of choline acetyltransferase (ChAT), the secretion of acetylcholine and the expression of CHRM3 in prostate epithelial cells, supporting the presence of autocrine cholinergic signaling in the prostate epithelium. In addition, we found that CHRM3 was upregulated in clinical prostate cancer tissues compared with adjacent non-cancer tissues. Overexpression of CHRM3 or activation of CHRM3 by carbachol promoted cell proliferation, migration, and castration resistance. On the contrary, blockading CHRM3 by shRNA or treatment with darifenacin inhibited prostate cancer growth and castration resistance both in vitro and in vivo. Furthermore, we found that autocrine cholinergic signaling caused calmodulin/calmodulin-dependent protein kinase kinase (CaM/CaMKK)-mediated phosphorylation of Akt. CONCLUSIONS These findings suggest that blockade of CHRM3 may represent a novel adjuvant therapy for castration-resistant prostate cancer.
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Affiliation(s)
- Naitao Wang
- State Key Laboratory of Oncogenes and Related Genes, Renji-Med X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Ming Yao
- State Key Laboratory of Oncogenes and Related Genes, Renji-Med X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Jin Xu
- State Key Laboratory of Oncogenes and Related Genes, Renji-Med X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Yizhou Quan
- State Key Laboratory of Oncogenes and Related Genes, Renji-Med X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Kaiqing Zhang
- State Key Laboratory of Oncogenes and Related Genes, Renji-Med X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Ru Yang
- State Key Laboratory of Oncogenes and Related Genes, Renji-Med X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China.
| | - Wei-Qiang Gao
- State Key Laboratory of Oncogenes and Related Genes, Renji-Med X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China.
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76
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Xiao W, Gao Z, Duan Y, Yuan W, Ke Y. Downregulation of miR-19a exhibits inhibitory effects on metastatic renal cell carcinoma by targeting PIK3CA and inactivating Notch signaling in vitro. Oncol Rep 2015; 34:739-46. [PMID: 26058752 DOI: 10.3892/or.2015.4041] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Accepted: 04/28/2015] [Indexed: 11/05/2022] Open
Abstract
Metastasis seriously affects the clinical outcome of renal cell carcinoma patients. Despite the approval of several targeted therapies that have led to an improvement in the progression-free survival rate for these patients, advanced and metastatic renal cell carcinoma remains difficult to treat. Recently, microRNAs have been found to play a critical role in the metastatic dissemination of renal cell carcinoma cells. In the present study, we found that miR-19a expression was significantly upregulated in metastatic clear cell renal carcinoma than that in adjacent and primary carcinoma tissues using qPCR and in situ hybridization experiments. In addition, the results were confirmed in renal carcinoma cell lines. miR-19a expression in the cell lines derived from a metastatic site was higher than that in cell lines derived from a primary site. By gain- and loss-of-function experiments, we found that miR-19a acted as an oncogenic miRNA regulating renal cancer cell proliferation, migration and invasion by directly targeting PIK3CA. Furthermore, we also explored the downstream molecules of miR-19a/PIK3CA signaling. We found that Notch signaling was induced by upregulation of miR-19a, and inactivation of Notch signaling attenuated the cell proliferation, migration and invasion promoted by miR-19a. Thus, we provide evidence demonstrating that downregulation of miR-19a may be therapeutically beneficial for metastatic renal carcinoma.
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Affiliation(s)
- Wei Xiao
- Department of Urology, Hunan Provincial People's Hospital, Changsha, Hunan 410005, P.R. China
| | - Zhiyong Gao
- Department of Urology, Hunan Provincial People's Hospital, Changsha, Hunan 410005, P.R. China
| | - Yixing Duan
- Department of Urology, Hunan Provincial People's Hospital, Changsha, Hunan 410005, P.R. China
| | - Wuxiong Yuan
- Department of Urology, Hunan Provincial People's Hospital, Changsha, Hunan 410005, P.R. China
| | - Yang Ke
- Department of Urology, Hunan Provincial People's Hospital, Changsha, Hunan 410005, P.R. China
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77
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Zhou C, Shen L, Mao L, Wang B, Li Y, Yu H. miR-92a is upregulated in cervical cancer and promotes cell proliferation and invasion by targeting FBXW7. Biochem Biophys Res Commun 2015; 458:63-9. [PMID: 25623537 DOI: 10.1016/j.bbrc.2015.01.066] [Citation(s) in RCA: 93] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Accepted: 01/14/2015] [Indexed: 11/30/2022]
Abstract
MicroRNAs (miRNAs) are involved in the cervical carcinogenesis and progression. In this study, we investigated the role of miR-92a in progression and invasion of cervical cancer. MiR-92a was significantly upregulated in cervical cancer tissues and cell lines. Overexpression of miR-92a led to remarkably enhanced proliferation by promoting cell cycle transition from G1 to S phase and significantly enhanced invasion of cervical cancer cells, while its knockdown significantly reversed these cellular events. Bioinformatics analysis suggested F-box and WD repeat domain-containing 7 (FBXW7) as a novel target of miR-92a, and miR-92a suppressed the expression level of FBXW7 mRNA by direct binding to its 3'-untranslated region (3'UTR). Expression of miR-92a was negatively correlated with FBXW7 in cervical cancer tissues. Furthermore, Silencing of FBXW7 counteracted the effects of miR-92a suppression, while its overexpression reversed oncogenic effects of miR-92a. Together, these findings indicate that miR-92a acts as an onco-miRNA and may contribute to the progression and invasion of cervical cancer, suggesting miR-92a as a potential novel diagnostic and therapeutic target of cervical cancer.
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Affiliation(s)
- Chuanyi Zhou
- Department of Oncology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Liangfang Shen
- Department of Oncology, Xiangya Hospital, Central South University, Changsha 410008, China.
| | - Lei Mao
- Department of Radiation Oncology, Yueyang Second People's Hospital, Yueyang 414000, China
| | - Bing Wang
- Department of Radiation Oncology, Yueyang Second People's Hospital, Yueyang 414000, China
| | - Yang Li
- Department of Radiation Oncology, Yueyang Second People's Hospital, Yueyang 414000, China
| | - Huizhi Yu
- Department of Radiation Oncology, Yueyang Second People's Hospital, Yueyang 414000, China
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78
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Jackson BL, Grabowska A, Ratan HL. MicroRNA in prostate cancer: functional importance and potential as circulating biomarkers. BMC Cancer 2014; 14:930. [PMID: 25496077 PMCID: PMC4295407 DOI: 10.1186/1471-2407-14-930] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Accepted: 12/01/2014] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND This non-systematic review article aims to summarise the progress made in understanding the functional consequences of microRNA (miRNA) dysregulation in prostate cancer development, and the identification of potential miRNA targets as serum biomarkers for diagnosis or disease stratification. RESULTS A number of miRNAs have been shown to influence key cellular processes involved in prostate tumourigenesis, including apoptosis-avoidance, cell proliferation and migration and the androgen signalling pathway. An overlapping group of miRNAs have shown differential expression in the serum of patients with prostate cancer of varying stages compared with unaffected individuals. The majority of studies thus far however, involve small numbers of patients and have shown variable and occasionally conflicting results CONCLUSION MiRNAs show promise as potential circulating biomarkers in prostate cancer, but larger prospective studies are required to validate particular targets and better define their clinical utility.
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Affiliation(s)
- Benjamin L Jackson
- />Unit of Cancer Biology, University of Nottingham, Queens Medical Centre, Derby Road, Nottingham, NG7 2UH England
| | - Anna Grabowska
- />Unit of Cancer Biology, University of Nottingham, Queens Medical Centre, Derby Road, Nottingham, NG7 2UH England
| | - Hari L Ratan
- />Unit of Cancer Biology, University of Nottingham, Queens Medical Centre, Derby Road, Nottingham, NG7 2UH England
- />Department of Urology, Nottingham City Hospital, Hucknall Road, Nottingham, NG5 1PB England
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79
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Felgueiras J, Fardilha M. Phosphoprotein phosphatase 1-interacting proteins as therapeutic targets in prostate cancer. World J Pharmacol 2014; 3:120-139. [DOI: 10.5497/wjp.v3.i4.120] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2014] [Revised: 09/01/2014] [Accepted: 09/24/2014] [Indexed: 02/06/2023] Open
Abstract
Prostate cancer is a major public health concern worldwide, being one of the most prevalent cancers in men. Great improvements have been made both in terms of early diagnosis and therapeutics. However, there is still an urgent need for reliable biomarkers that could overcome the lack of cancer-specificity of prostate-specific antigen, as well as alternative therapeutic targets for advanced metastatic cases. Reversible phosphorylation of proteins is a post-translational modification critical to the regulation of numerous cellular processes. Phosphoprotein phosphatase 1 (PPP1) is a major serine/threonine phosphatase, whose specificity is determined by its interacting proteins. These interactors can be PPP1 substrates, regulators, or even both. Deregulation of this protein-protein interaction network alters cell dynamics and underlies the development of several cancer hallmarks. Therefore, the identification of PPP1 interactome in specific cellular context is of crucial importance. The knowledge on PPP1 complexes in prostate cancer remains scarce, with only 4 holoenzymes characterized in human prostate cancer models. However, an increasing number of PPP1 interactors have been identified as expressed in human prostate tissue, including the tumor suppressors TP53 and RB1. Efforts should be made in order to identify the role of such proteins in prostate carcinogenesis, since only 26 have yet well-recognized roles. Here, we revise literature and human protein databases to provide an in-depth knowledge on the biological significance of PPP1 complexes in human prostate carcinogenesis and their potential use as therapeutic targets for the development of new therapies for prostate cancer.
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80
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Ma G, Dai W, Sang A, Yang X, Gao C. Upregulation of microRNA-23a/b promotes tumor progression and confers poor prognosis in patients with gastric cancer. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2014; 7:8833-8840. [PMID: 25674252 PMCID: PMC4314044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Accepted: 11/26/2014] [Indexed: 06/04/2023]
Abstract
BACKGROUND AND PURPOSE To investigate the clinical significance of microRNA (miR)-23a and miR-23b expression in human gastric cancer (GC). METHODS Quantitative RT-PCR was performed to detect the expression changes of miR-23a and miR-23b in 160 human GC tissues and paired normal mucosa. The associations between miR-23a and miR-23b expression, and the selected clinicopathological characteristics and patients' prognosis were also evaluated. RESULTS MiR-23a (GC vs. Normal: 3.98 ± 1.23 vs. 2.29 ± 1.12, P < 0.001) and miR-23b (GC vs. Normal: 3.70 ± 1.24 vs. 1.58 ± 1.18, P < 0.001) expression were both increased dramatically when compared with paired normal mucosa. Notably, the expression levels of miR-23a in GC tissues were positively correlated with those of miR-23b (Spearman correlation coefficient r = 0.77, P < 0.001). Then, the coexpression of miR-23a and miR-23b (miR-23a-high/miR-23b-high) in GC tissues was significantly associated with the advanced TNM stage (P < 0.001), the presence of lymph node metastasis (P = 0.008) and the great depth of invasion (P = 0.02). Furthermore, both univariate and multivariate analyses showed that miR-23a/miR-23b co-expression was an independent predictor for unfavorable overall survival. CONCLUSIONS These results suggest that the dysregulation of miR-23a and miR-23b may be implicated in the progression of human GC. Combined expression of miR-23a and miR-23b appears to be a valuable marker for prognosis of this disease.
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Affiliation(s)
- Gang Ma
- Department of Gastroenterology, Huai’an First People’s Hospital, Nanjing Medical University6 Beijing Road West, Huai’an 223300, Jiangsu, P. R. China
| | - Weijie Dai
- Department of Gastroenterology, Huai’an First People’s Hospital, Nanjing Medical University6 Beijing Road West, Huai’an 223300, Jiangsu, P. R. China
| | - Aiyu Sang
- Department of Internal Medicine, Lianshui Third People’s Hospital12 Gaogouzhen 307 Road South, Lianshui 223411, Jiangsu, P. R. China
| | - Xiaozhong Yang
- Department of Gastroenterology, Huai’an First People’s Hospital, Nanjing Medical University6 Beijing Road West, Huai’an 223300, Jiangsu, P. R. China
| | - Chengcheng Gao
- Department of Gastroenterology, Huai’an First People’s Hospital, Nanjing Medical University6 Beijing Road West, Huai’an 223300, Jiangsu, P. R. China
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81
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Xu WT, Yang Z, Lu NH. Roles of PTEN (Phosphatase and Tensin Homolog) in gastric cancer development and progression. Asian Pac J Cancer Prev 2014; 15:17-24. [PMID: 24528021 DOI: 10.7314/apjcp.2014.15.1.17] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Gastric cancer is highly invasive, aggressively malignant, and amongst the most prevalent of all forms of cancer. Despite improved management strategies, early stage diagnosis of gastric cancer and accurate prognostic assessment is still lacking. Several recent reports have indicated that the pathogenesis of gastric cancer involves complex molecular mechanisms and multiple genetic and epigenetic alterations in oncogenes and tumor suppressor genes. Functional inactivation of the tumor suppressor protein PTEN (Phosphatase and Tensin Homolog) has been detected in multiple cases of gastric cancer, and already shown to be closely linked to the development, progression and prognosis of the disease. Inactivation of PTEN can be attributed to gene mutation, loss of heterozygosity, promoter hypermethylation, microRNA- mediated regulation of gene expression, and post-translational phosphorylation. PTEN is also involved in mechanisms regulating tumor resistance to chemotherapy. This review provides a comprehensive analysis of PTEN and its roles in gastric cancer, and emphasizes its potential benefits in early diagnosis and gene therapy-based treatment strategies.
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Affiliation(s)
- Wen-Ting Xu
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, China E-mail :
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82
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The miRNA23b-regulated signaling network as a key to cancer development--implications for translational research and therapeutics. J Mol Med (Berl) 2014; 92:1129-38. [PMID: 25301113 DOI: 10.1007/s00109-014-1208-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Revised: 08/19/2014] [Accepted: 09/02/2014] [Indexed: 02/06/2023]
Abstract
A growing body of evidence indicates that microRNA23b (miR23b) is pleiotropic-it plays important roles in regulating physiological functions of cells, in regulating differentiation of cells and in regulating cellular immune responses. Our review of the literature showed that dysregulation of miR23b expression is implicated in the disruption of these cellular mechanisms and development of diseases such as cancer. MiR23b dysregulation appears to do this by modulating the expression level of candidate gene products involved in a network of signaling pathways including TGF-beta and Notch pathways that govern malignant properties of cancer cells such as motility and invasiveness. More recently, miR23b regulation of gene expression has also been associated with cancer stem cells and chemoresistance. Our review covers miR23b's role in immunity, endothelial function, differentiation, and cancer as well as its potential for translation into future cancer diagnostics and therapeutics.
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83
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Wang X, Sun J, Fu C, Wang D, Bi Z. MicroRNA-214 regulates osteosarcoma survival and growth by directly targeting phosphatase and tensin homolog. Mol Med Rep 2014; 10:3073-9. [PMID: 25310480 DOI: 10.3892/mmr.2014.2616] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Accepted: 07/01/2014] [Indexed: 11/06/2022] Open
Abstract
An increasing number of microRNAs (miRNAs) have been identified as diagnostic and prognostic biomarkers, as well as additional therapeutic tools, in skeletal diseases. Recent studies have established the pathophysiological role of miR‑214, using human osteoporotic bone specimens. However, miR‑214 expression levels and the underlying regulatory mechanism in human osteosarcoma remain unclear. Quantitative polymerase chain reaction (qPCR) was used to examine the expression of miR‑214 in human osteosarcoma tissues and cells. Transfection of the cells with either a miR‑214 expressing‑plasmid, mimic or inhibitor was performed, in order to investigate the role of miR‑214 in osteosarcoma. In this study, miR‑214 was shown to be significantly increased in the majority of 15 examined osteosarcoma tissues and in the Saos‑2 human osteosarcoma cell line. Overexpression of miR‑214 in Saos‑2 cells induced cell proliferation, while inhibition of miR‑214 promoted Saos‑2 cell apoptosis in vitro. Furthermore, ectopic expression of miR‑214 markedly promoted osteosarcoma development in a subcutaneous xenotransplantation model in BALB/c athymic nude mice. The role of miR‑214 in osteocarcinogenesis was further investigated and phosphatase and tensin homolog (PTEN) was determined to be a direct target of miR‑214 in Saos‑2 cells. The proliferation‑promoting effect of PTEN knockdown was similar to that of miR‑214 overexpression. This study revealed that miR‑214 exerted a crucial role in promoting osteosarcoma progression and this suggests that modulation of miR‑214 levels may provide a novel therapeutic approach in cancer treatment.
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Affiliation(s)
- Xuming Wang
- Department of Orthopedics, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Jiabing Sun
- Department of Orthopedics, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Chunjiang Fu
- Department of Orthopedics, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Dewei Wang
- Department of Orthopedics, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Zhenggang Bi
- Department of Orthopedics, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
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Current clinical regulation of PI3K/PTEN/Akt/mTOR signalling in treatment of human cancer. J Cancer Res Clin Oncol 2014; 141:671-89. [PMID: 25146530 DOI: 10.1007/s00432-014-1803-3] [Citation(s) in RCA: 122] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Accepted: 08/08/2014] [Indexed: 01/14/2023]
Abstract
PURPOSE PTEN is an essential tumour suppressor gene which encodes a phosphatase protein that antagonises the PI3K/Akt/mTOR antiapoptotic pathway. Impairment of this tumour suppressor pathway potentially becomes a causal factor for development of malignancies. This review aims to assess current understanding of mechanisms of dysfunction involving the PI3K/PTEN/Akt/mTOR pathway linked to tumorigenesis and evaluate the evidence for targeted therapy directed at this signalling axis. METHODS Relevant articles in scientific databases were identified using a combination of search terms, including "malignancies", "targeted therapy", "PTEN", and "combination therapy". These databases included Medline, Embase, Cochrane Review, Pubmed, and Scopus. RESULTS PI3K/PTEN expression is frequently deregulated in a majority of malignancies through genetic, epigenetic, and post-transcriptional modifications. This contributes to the upregulation of the PI3K/Akt/mTOR pathway which has been the focus of intense clinical studies. Targeted agents aimed at this pathway offer a novel treatment approach in a variety of haematologic malignancies and solid tumours. Compared to single-agent use, greater response rates were obtained in combination regimens, supporting further investigation of suitable drug combinations in a broad spectrum of malignancies. CONCLUSION Activation of the PI3K/PTEN/Akt/mTOR pathway is implicated both in the pathogenesis of malignancies and development of resistance to anticancer therapies. Therefore, PI3K/Akt/mTOR inhibitors are a promising therapeutic option, in association with systemic cytotoxic and biological therapies, to enable sustained clinical outcomes in cancer treatment. Therapeutic strategies could be tailored according to appropriate biomarkers and patient-specific mutation profiles to maximise benefit of combination therapies.
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85
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Dong P, Konno Y, Watari H, Hosaka M, Noguchi M, Sakuragi N. The impact of microRNA-mediated PI3K/AKT signaling on epithelial-mesenchymal transition and cancer stemness in endometrial cancer. J Transl Med 2014; 12:231. [PMID: 25141911 PMCID: PMC4145234 DOI: 10.1186/s12967-014-0231-0] [Citation(s) in RCA: 94] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2014] [Accepted: 08/12/2014] [Indexed: 02/06/2023] Open
Abstract
Activation of the PI3K/AKT pathway, a common mechanism in all subtypes of endometrial cancers (endometrioid and non-endometrioid tumors), has important roles in contributing to epithelial-mesenchymal transition (EMT) and cancer stem cell (CSC) features. MicroRNAs (miRNAs) are small non-coding RNA molecules that concurrently affect multiple target genes, and regulate a wide range of genes involved in modulating EMT and CSC properties. Here we overview the recent advances revealing the impact of miRNAs on EMT and CSC phenotypes in tumors including endometrial cancer via regulating PI3K/AKT pathway. MiRNAs are crucial mediators of EMT and CSC through targeting PTEN-PI3K-AKT-mTOR axis. In endometrial cancer cells, miRNAs can activate or attenuate EMT and CSC by targeting PTEN and other EMT-associated genes, such as Twist1, ZEB1 and BMI-1. More detailed studies of miRNAs will deepen our understanding of the molecular basis underlying PI3K/AKT-induced endometrial cancer initiation and progression. Targeting key signaling components of PI3K/AKT pathway by restoring or inhibiting miRNA function holds promise as a potential therapeutic approach to suppress EMT and CSC in endometrial cancer.
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Affiliation(s)
- Peixin Dong
- Department of Women's Health Educational System, Hokkaido University School of Medicine, Hokkaido University, N15, W7, Sapporo 0608638, Japan.
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Tarasov VA, Matishov DG, Shin EF, Boyko NV, Timoshkina NN, Makhotkin MA, Lomonosov AM, Kirpiy AA. Inheritable changes in miRNAs expression in HeLa cells after X-ray and mitomycin C treatment. RUSS J GENET+ 2014. [DOI: 10.1134/s1022795414080092] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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87
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Uversky VN, Davé V, Iakoucheva LM, Malaney P, Metallo SJ, Pathak RR, Joerger AC. Pathological unfoldomics of uncontrolled chaos: intrinsically disordered proteins and human diseases. Chem Rev 2014; 114:6844-79. [PMID: 24830552 PMCID: PMC4100540 DOI: 10.1021/cr400713r] [Citation(s) in RCA: 196] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Vladimir N. Uversky
- Department of Molecular Medicine and USF Health Byrd Alzheimer’s Research Institute University of South Florida, Tampa, Florida 33612, United States
- Institute for Biological Instrumentation, Russian Academy of Sciences, 142290 Pushchino, Moscow Region, Russia
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah 22254, Saudi Arabia
| | - Vrushank Davé
- Department of Pathology and Cell Biology , Morsani College of Medicine, University of South Florida, Tampa, Florida 33612, United States
- Department of Molecular Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida 33612, United States
| | - Lilia M. Iakoucheva
- Department of Psychiatry, University of California San Diego, La Jolla, California 92093, United States
| | - Prerna Malaney
- Department of Pathology and Cell Biology , Morsani College of Medicine, University of South Florida, Tampa, Florida 33612, United States
| | - Steven J. Metallo
- Department of Chemistry, Georgetown University, Washington, District of Columbia 20057, United States
| | - Ravi Ramesh Pathak
- Department of Pathology and Cell Biology , Morsani College of Medicine, University of South Florida, Tampa, Florida 33612, United States
| | - Andreas C. Joerger
- Medical Research Council Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, United Kingdom
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Donadelli M, Dando I, Fiorini C, Palmieri M. Regulation of miR-23b expression and its dual role on ROS production and tumour development. Cancer Lett 2014; 349:107-13. [DOI: 10.1016/j.canlet.2014.04.012] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Revised: 04/04/2014] [Accepted: 04/11/2014] [Indexed: 01/07/2023]
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89
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MiR-26a inhibits prostate cancer progression by repression of Wnt5a. Tumour Biol 2014; 35:9725-33. [PMID: 24972966 DOI: 10.1007/s13277-014-2206-4] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Accepted: 06/06/2014] [Indexed: 10/25/2022] Open
Abstract
MicroRNAs (miRNAs) are small noncoding RNAs that are involved in different biological processes by suppressing target gene expression. miRNA microarray analysis revealed a significant decrease of miR-26a in prostate cancer tissues versus their normal counterparts, but the role of miR-26a is needed to investigate. In the present study, we found that miR-26a expression was lower in prostate cancer tissues compared with their normal controls, so did the prostate cancer cells. Next, by lentivirus-mediated gain-of-function studies, it was showed that stable miR-26a inhibited cell proliferation, metastasis, and epithelial mesenchymal transition and induced G1 phase arrest in prostate cancer. It was predicted that Wnt5a was a potential target gene of miR-26a by bioinformatics analysis. Then, luciferase assay and Western blot analysis identified that Wnt5a was a new direct target gene of miR-26a and miR-26a inhibited prostate cancer progression via Wnt5a. Altogether, the findings suggested that miR-26a may function as a tumor suppressor in prostate cancer by targeting Wnt5a.
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Zhang B, Zhou M, Li C, Zhou J, Li H, Zhu D, Wang Z, Chen A, Zhao Q. MicroRNA-92a inhibition attenuates hypoxia/reoxygenation-induced myocardiocyte apoptosis by targeting Smad7. PLoS One 2014; 9:e100298. [PMID: 24941323 PMCID: PMC4062536 DOI: 10.1371/journal.pone.0100298] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Accepted: 05/23/2014] [Indexed: 11/18/2022] Open
Abstract
Background MicroRNAs (miRNAs) regulate a lot of physiological and pathological processes, including myocardial ischemia/reperfusion. Recent studies reported that knockdown of miR-92a could attenuate ischemia/reperfusion-induced myocardial injury. In the present study, we examined the potential anti-apoptotic effects of miR-92a in a rat myocardiocyte cell line, and the possible role of Smad7 in such actions. Methodology and Results In a preliminary bioinformatic analysis, we identified SMAD family member 7 (Smad7) as a potential target for miR-92a. A luciferase reporter assay indeed demonstrated that miR-92a could inhibit Smad7 expression. Myocardial ischemia/reperfusion was simulated in rat H9c2 cells with 24-h hypoxia followed by 12-h reoxygenation. Prior to hypoxia/reoxygenation, cells were transfected by miR-92a inhibitor. In some experiments, cells were co-transfected with siRNA-Smad7. The miR-92a inhibitor dramatically reduced the release of lactate dehydrogenase and malonaldehyde, and attenuated cardiomyocyte apoptosis. The miR-92a inhibitor increased SMAD7 protein level and decreased nuclear NF-κB p65 protein. Effects of the miR-92a inhibitor were attenuated by co-transfection with siRNA-Smad7. Conclusion Inhibiting miR-92a can attenuate myocardiocyte apoptosis induced by hypoxia/reoxygenation by targeting Smad7.
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Affiliation(s)
- Busheng Zhang
- Department of Cardiac Surgery, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Mi Zhou
- Department of Cardiac Surgery, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Canbo Li
- Department of Cardiac Surgery, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Jingxin Zhou
- Department of Cardiac Surgery, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Haiqing Li
- Department of Cardiac Surgery, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Dan Zhu
- Department of Cardiac Surgery, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Zhe Wang
- Department of Cardiac Surgery, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Anqing Chen
- Department of Cardiac Surgery, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Qiang Zhao
- Department of Cardiac Surgery, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- * E-mail:
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91
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Abstract
Prostate cancer is the second leading cause of cancer related death in American men. Androgen deprivation therapy (ADT) is used to treat patients with aggressive prostate cancers. After androgen deprivation therapy, prostate cancers slowly progress to an androgen-independent status. Taxanes (e.g., docetaxel) are used as standard treatments for androgen-independent prostate cancers. However, these chemotherapeutic agents will eventually become ineffective due to the development of drug resistance. A microRNA (miRNA) is a small noncoding RNA molecule, which can regulate gene expression at the post-transcription level. miRNAs elicit their effects by binding to the 3'-untranslated region (3'-UTR) of their target mRNAs, leading to the inhibition of translation or the degradation of the mRNAs. miRNAs have received increasing attention as targets for cancer therapy, as they can target multiple signaling pathways related to tumor progression, metastasis, invasion, and chemoresistance. Emerging evidence suggests that aberrant expression of miRNAs can lead to the development of resistant prostate cancers. Here, we discuss the roles of miRNAs in the development of resistant prostate cancers and their involvement in various drug resistant mechanisms including androgen signaling, apoptosis avoidance, multiple drug resistance (MDR) transporters, epithelialmesenchymal transition (EMT), and cancer stem cells (CSCs). In addition, we also discuss strategies for treating resistant prostate cancers by targeting specific miRNAs. Different delivery strategies are also discussed with focus on those that have been successfully used in human clinical trials.
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Affiliation(s)
- Feng Li
- Department of Pharmaceutical Sciences, School of Pharmacy, Hampton University , Hampton, Virginia 23668, United States
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92
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Zhang L, Zhou M, Qin G, Weintraub NL, Tang Y. MiR-92a regulates viability and angiogenesis of endothelial cells under oxidative stress. Biochem Biophys Res Commun 2014; 446:952-8. [PMID: 24650666 DOI: 10.1016/j.bbrc.2014.03.035] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Accepted: 03/10/2014] [Indexed: 01/14/2023]
Abstract
Oxidative stress contributes to endothelial cell (EC) dysfunction, which is prevalent in ageing and atherosclerosis. MicroRNAs (miRs) are small, non-coding RNAs that post-transcriptionally regulate gene expression and play a key role in fine-tuning EC functional responses, including apoptosis and angiogenesis. MiR-92a is highly expressed in young endothelial cells in comparison with senescent endothelial cells, which exhibit increased oxidative stress and apoptosis. However, the impact of miR-92a treatment on EC viability and angiogenesis under oxidative stress is unknown. Hydrogen peroxide (H2O2) was used to induce oxidative stress in human umbilical vein endothelial cells (HUVEC). Pre-miR-92a treatment decreased H2O2-induced apoptosis of HUVEC as determined by TUNEL assay. Pre-miR-92a treatment enhanced capillary tube formation by HUVEC under oxidative stress, which was blocked by LY294002, an inhibitor of Akt phosphorylation. Interestingly, we also observed that inhibition of miR-92a by anti-miR-92a antisense can also enhance angiogenesis in HUVEC with and without oxidative stress exposure. Our results show that perturbation of miR-92a levels outside of its narrow "homeostatic" range may trigger endothelial cell angiogenesis, suggesting that the role of miR-92a in regulating angiogenesis is controversial and may vary depending on the experimental model and method of regulating miR-92a.
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Affiliation(s)
- Lan Zhang
- Department of Vascular Surgery, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China; Vascular Biology Center, Department of Medicine, Medical College of Georgia/Georgia Regents University, 1459 Laney Walker Blvd, Augusta, GA 30912, USA
| | - Mi Zhou
- Department of Cardiac Surgery, Rui Jin Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai 200025, China
| | - Gangjian Qin
- Feinberg Cardiovascular Research Institute, Department of Medicine-Cardiology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Neal L Weintraub
- Vascular Biology Center, Department of Medicine, Medical College of Georgia/Georgia Regents University, 1459 Laney Walker Blvd, Augusta, GA 30912, USA
| | - Yaoliang Tang
- Vascular Biology Center, Department of Medicine, Medical College of Georgia/Georgia Regents University, 1459 Laney Walker Blvd, Augusta, GA 30912, USA.
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