1
|
Eini M, Parsi S, Barati M, Bahramali G, Alizadeh Zarei M, Kiani J, Azarnezhad A, Hosseini A. Bioinformatic Investigation of Micro RNA-802 Target Genes, Protein Networks, and Its Potential Prognostic Value in Breast Cancer. Avicenna J Med Biotechnol 2022; 14:154-164. [PMID: 35633990 PMCID: PMC9077654 DOI: 10.18502/ajmb.v14i2.8882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Accepted: 01/22/2022] [Indexed: 11/24/2022] Open
Abstract
Background An increasing number of studies have suggested that unveiling the molecular network of miRNAs may provide novel therapeutic targets or biomarkers. In this study, we investigated the probable molecular functions that are related to microRNA-802 (miR-802) and evaluated its prognostic value in breast cancer utilizing bioinformatics tools. Methods PPI network, pathway enrichment and transcription factor analysis were applied to obtain hub genes among overlapping genes of four miRNA target prediction databases. Prognosis value assessments and expression analysis of hub genes using bioinformatics tools, as well as their literature validation were performed. Results Our results showed a significant correlation of the miR-802 overexpression with poor patient survival rate (BC, p=2.7e-5). We determined 247 target genes significant for GO and KEGG terms. Analysis of TFs by TRUST showed that RUNX3, FOXO3, and E2F1 are possible TFs that regulate the miR-802 expression and target genes network. According to our analysis; 21 genes might have an important function in miR-802 molecular processes and regulatory networks. The result shows that among these 21 genes, 8 genes (CASC3, ITGA4, AGO3, TARDBP, MED13L, SF1, SNRPE and CRNKL1) are positively correlated with patient survival. Therefore these genes could be considered and experimentally evaluated as a prognostic biomarker for breast cancer. Conclusion The comprehensive bioinformatics study on miR-802 target genes provided insight into miR-802 mediated pathways and processes. Furthermore, representing candidate target genes by prognostic values indicates the potential clinical application of miR-802 in breast cancer.
Collapse
Affiliation(s)
- Maryam Eini
- Department of Biotechnology, Faculty of Allied Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Sepideh Parsi
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School Worcester, MA, USA
| | - Mahmood Barati
- Department of Biotechnology, Faculty of Allied Medicine, Iran University of Medical Sciences, Tehran, Iran
| | | | | | - Jafar Kiani
- Department of Molecular Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Assad Azarnezhad
- Liver and Digestive Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Arshad Hosseini
- Department of Biotechnology, Faculty of Allied Medicine, Iran University of Medical Sciences, Tehran, Iran
| |
Collapse
|
2
|
Wei J, Wang R, Lu Y, He S, Ding Y. Flotillin-1 promotes progression and dampens chemosensitivity to cisplatin in gastric cancer via ERK and AKT signaling pathways. Eur J Pharmacol 2022; 916:174631. [PMID: 34774850 DOI: 10.1016/j.ejphar.2021.174631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 11/08/2021] [Accepted: 11/09/2021] [Indexed: 11/20/2022]
Abstract
BACKGROUND Several past studies have reported the overexpression of Flotillin-1 in a variety of cancer types. Cisplatin is a chemotherapeutic drug commonly used for cancer treatment. The present study investigated the role of Flotillin-1 in the progression of GC and assessed whether it assists in the chemical sensitization of GC cells toward cisplatin. METHOD The expression of Flotillin-1 was detected both in human gastric mucosal cells and GC cells. Next, siRNA and shRNA were used to construct a stable cell line expressing low levels of Flotillin-1. Furthermore, the Cell Counting Kit 8 (CCK-8), flow cytometry, and transwell assays were employed to detect the impact of Flotillin-1 on GC cells. In addition, a nude mouse model of human GC was used to verify the knockdown of Flotillin-1 to increase the sensitivity of GC cells to cisplatin. RESULTS Flotillin-1 was overexpressed in GC cells when compared to that in human gastric mucosal cells. The results for in vitro and vivo assays revealed that the knockdown of Flotillin-1 could significantly inhibit the proliferation of GC cells and increased the sensitivity of GC cells to cisplatin via the regulation of the protein kinase B (AKT) and extracellular signal-regulated kinase (ERK) signaling pathway. CONCLUSION Flotillin-1 might be used as a molecular marker for GC diagnosis and could be explored as a potential new target for the treatment of GC.
Collapse
Affiliation(s)
- Jiahui Wei
- Department of Laboratory Animals, College of Animal Sciences, Jilin University, Changchun, Jilin, 130062, PR China
| | - Ruiqing Wang
- The Eye Center in the Second Hospital of Jilin University, Ziqiang Street 218#, Nanguan District, Changchun City, Jilin, 130041, China
| | - Yiran Lu
- Department of Laboratory Animals, College of Animal Sciences, Jilin University, Changchun, Jilin, 130062, PR China
| | - Song He
- Department of Laboratory Animals, College of Animal Sciences, Jilin University, Changchun, Jilin, 130062, PR China
| | - Yu Ding
- Department of Laboratory Animals, College of Animal Sciences, Jilin University, Changchun, Jilin, 130062, PR China.
| |
Collapse
|
3
|
Saller J, Jiang K, Xiong Y, Yoder SJ, Neill K, Pimiento JM, Pena L, Corbett FS, Magliocco A, Coppola D. A microRNA Signature Identifies Patients at Risk of Barrett Esophagus Progression to Dysplasia and Cancer. Dig Dis Sci 2022; 67:516-523. [PMID: 33713247 PMCID: PMC9768694 DOI: 10.1007/s10620-021-06863-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Accepted: 01/20/2021] [Indexed: 02/03/2023]
Abstract
BACKGROUND Progression of Barrett esophagus (BE) to esophageal adenocarcinoma occurs among a minority of BE patients. To date, BE behavior cannot be predicted on the basis of histologic features. AIMS We compared BE samples that did not develop dysplasia or carcinoma upon follow-up of ≥ 7 years (BE nonprogressed [BEN]) with BE samples that developed carcinoma upon follow-up of 3 to 4 years (BE progressed [BEP]). METHODS The NanoString nCounter miRNA assay was used to profile 24 biopsy samples of BE, including 13 BENs and 11 BEPs. Fifteen samples were randomly selected for miRNA prediction model training; nine were randomly selected for miRNA validation. RESULTS Unpaired t tests with Welch's correction were performed on 800 measured miRNAs to identify the most differentially expressed miRNAs for cases of BEN and BEP. The top 12 miRNAs (P < .003) were selected for principal component analyses: miR-1278, miR-1301, miR-1304-5p, miR-517b-3p, miR-584-5p, miR-599, miR-103a-3p, miR-1197, miR-1256, miR-509-3-5p, miR-544b, miR-802. The 12-miRNA signature was first self-validated on the training dataset, resulting in 7 out of the 7 BEP samples being classified as BEP (100% sensitivity) and 7 out of the 8 BEN samples being classified as BEN (87.5% specificity). Upon validation, 4 out of the 4 BEP samples were classified as BEP (100% sensitivity) and 4 out of the 5 BEN samples were classified as BEN (80% specificity). Twenty-four samples were evaluated, and 22 cases were correctly classified. Overall accuracy was 91.67%. CONCLUSION Using miRNA profiling, we have identified a 12-miRNA signature able to reliably differentiate cases of BEN from BEP.
Collapse
Affiliation(s)
- James Saller
- Department of Anatomic Pathology, H. Lee Moffitt Cancer Center and Research Institute, 12902 Magnolia Dr., Tampa, FL 33612, USA
| | - Kun Jiang
- Department of Anatomic Pathology, H. Lee Moffitt Cancer Center and Research Institute, 12902 Magnolia Dr., Tampa, FL 33612, USA
| | - Yin Xiong
- Department of Biostatistics and Bioinformatics, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - Sean J. Yoder
- Molecular Genomics Core Facility, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - Kevin Neill
- Department of Anatomic Pathology, H. Lee Moffitt Cancer Center and Research Institute, 12902 Magnolia Dr., Tampa, FL 33612, USA
| | - Jose M. Pimiento
- Department of Gastrointestinal Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - Luis Pena
- Department of Gastrointestinal Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - F. Scott Corbett
- Division of Florida Digestive Health Specialists, Gastroenterology Associates of Sarasota, Bradenton, FL, USA
| | - Anthony Magliocco
- Department of Anatomic Pathology, H. Lee Moffitt Cancer Center and Research Institute, 12902 Magnolia Dr., Tampa, FL 33612, USA
| | - Domenico Coppola
- Department of Anatomic Pathology, H. Lee Moffitt Cancer Center and Research Institute, 12902 Magnolia Dr., Tampa, FL 33612, USA,Division of Florida Digestive Health Specialists, Gastroenterology Associates of Sarasota, Bradenton, FL, USA,Department of Tumor Biology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA,Department of Chemical Biology and Molecular Medicine, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| |
Collapse
|
4
|
Gao T, Zou M, Shen T, Duan S. Dysfunction of miR-802 in tumors. J Clin Lab Anal 2021; 35:e23989. [PMID: 34558723 PMCID: PMC8605121 DOI: 10.1002/jcla.23989] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 08/21/2021] [Accepted: 08/23/2021] [Indexed: 12/14/2022] Open
Abstract
Recent studies have shown that miR-802 is abnormally expressed in many tumors. miR-802 is expressed at low levels in tissues and cells of gastric cancer, colorectal cancer, breast cancer, cervical cancer, epithelial ovarian cancer, tongue squamous cell carcinoma, oral squamous cell carcinoma, esophageal squamous cell carcinoma, laryngeal squamous cell carcinoma, and melanoma. In contrast, miR-802 is overexpressed in hepatocellular carcinoma, bladder urothelial cancer, osteosarcoma, and cholesteatoma tissue cells. It should be noted that the results of studies on the expression of miR-802 in pancreatic cancer, prostate cancer, and lung cancer are inconsistent. Current studies have found that miR-802 can target and regulate genes in different tumors, and affect the regulation of the Wnt signaling pathway, EMT signaling pathway, PI3K/AKT signaling pathway, ERK signaling pathway, and Hedgehog signaling pathway. At the same time, miR-802 is regulated by the endogenous competition of four ceRNAs, including circDONSON, IGFL2-AS1, MIR155HG, and MIR4435-2HG. This article reviews the abnormal expression of miR-802 in a variety of tumors, expounds the mechanism by which miR-802 affects tumor progression by regulating different target genes, and elaborates the network of miR-802-related ceRNAs. We also summarized the limitations of miR-802 research and looked forward to the potential application of miR-802 in the diagnosis and prognosis of tumors.
Collapse
Affiliation(s)
- Tong Gao
- Medical Genetics Center, Ningbo University School of Medicine, Ningbo, China
| | - Mengsha Zou
- Medical Genetics Center, Ningbo University School of Medicine, Ningbo, China
| | - Tiancheng Shen
- Medical Genetics Center, Ningbo University School of Medicine, Ningbo, China
| | - Shiwei Duan
- Medical Genetics Center, Ningbo University School of Medicine, Ningbo, China.,School of Medicine, Zhejiang University City College, Hangzhou, China
| |
Collapse
|
5
|
Oh-Hohenhorst SJ, Lange T. Role of Metastasis-Related microRNAs in Prostate Cancer Progression and Treatment. Cancers (Basel) 2021; 13:cancers13174492. [PMID: 34503302 PMCID: PMC8431208 DOI: 10.3390/cancers13174492] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 09/01/2021] [Accepted: 09/02/2021] [Indexed: 02/07/2023] Open
Abstract
Simple Summary In this review article we summarize the current literature on the pro- and anti-metastatic roles of distinct microRNAs in prostate cancer with a particular focus on their impact on invasion, migration and epithelial-to-mesenchymal transition. Moreover, we give a brief overview on how this knowledge developed so far into novel therapeutic approaches to target metastatic prostate cancer. Abstract Prostate cancer (PCa) is one of the most prevalent cancer types in males and the consequences of its distant metastatic deposits are the leading cause of PCa mortality. Therefore, identifying the causes and molecular mechanisms of hematogenous metastasis formation is of considerable clinical importance for the future development of improved therapeutic approaches. MicroRNAs (miRNAs) are small non-coding RNAs that regulate gene expression at the post-transcriptional level by targeting messenger RNAs. Numerous studies have identified miRNAs as promotors or inhibitors of metastasis and revealed, in part, their targeting pathways in PCa. Because miRNAs are remarkably stable and can be detected in both tissue and body fluid, its potential as specific biomarkers for metastasis and therapeutic response is also currently under preclinical evaluation. In the present review, we focus on miRNAs that are supposed to initiate or suppress metastasis by targeting several key mRNAs in PCa. Metastasis-suppressing miRNAs include miR-33a-5p, miR-34, miR-132 and miR-212, miR-145, the miR-200 family (incl. miR-141-3p), miR-204-5p, miR-532-3p, miR-335, miR-543, miR-505-3p, miR 19a 3p, miR-802, miR-940, and miR-3622a. Metastasis-promoting RNAs, such as miR-9, miR-181a, miR-210-3, miR-454, miR-671-5p, have been shown to increase the metastatic potential of PCa cells. Other metastasis-related miRNAs with conflicting reports in the literature are also discussed (miR-21 and miR-186). Finally, we summarize the recent developments of miRNA-based therapeutic approaches, as well as current limitations in PCa. Taken together, the metastasis-controlling miRNAs provide the potential to be integrated in the strategy of diagnosis, prognosis, and treatment of metastatic PCa. Nevertheless, there is still a lack of consistency between certain miRNA signatures and reproducibility, which impedes clinical implementation.
Collapse
Affiliation(s)
- Su Jung Oh-Hohenhorst
- Martini-Klinik, Prostate Cancer Centre, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany;
- Institute of Anatomy and Experimental Morphology, University Cancer Center Hamburg, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany
- Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM) et Institut du Cancer de Montréal (ICM), Montreal, QC H2X 0A9, Canada
| | - Tobias Lange
- Institute of Anatomy and Experimental Morphology, University Cancer Center Hamburg, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany
- Correspondence:
| |
Collapse
|
6
|
Ni M, Yan Q, Xue H, Du Y, Zhao S, Zhao Z. Identification of MYLIP gene and miRNA-802 involved in the growth and metastasis of cervical cancer cells. Cancer Biomark 2021; 30:287-298. [PMID: 33185588 DOI: 10.3233/cbm-201523] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND The dysregulation of microRNA-802 (miR-802) has crucial roles in cancer progression. Nevertheless, the bio-function of miR-802 in cervical cancer remains unclear. OBJECTIVE Hence, we illuminated the potential roles of miR-802 in cervical cancer cell growth, migration, and invasion. METHODS The levels of miR-802 and myosin regulatory light chain interacting protein (MYLIP) were measured using qRT-PCR assay. The potential effects of miRNA-802 on cervical cancer cell proliferation and metastatic phenotypes were determined using CCK-8, colony formation, wound healing and Transwell invasion assays. MYLIP was validated as a downstream target gene of miRNA-802 using bioinformatics analysis tool and luciferase report gene assay. The impact of miR-802 on the growth of cervical cancer cell in vivo was analyzed using xenograft model. The expression of MYLIP was measured by western blotting and immunohistochemistry (IHC). RESULTS MiRNA-802 was distinctly down-regulated in cervical cancer cells as well as clinical cervical cancer samples. Upregulation of miRNA-802 significantly inhibited the growth and aggressiveness of cervical cancer cell. Additional, MYLIP was a functional target of miR-802. MYLIP was ovrerexpressed in cervical cancer and MYLIP level was negatively associated with the level of miR-802. Overexpression of MYLIP eliminated the inhibitory effects of miR-802 on growth and metastatic-related traits of cervical cancer cell. In vivo, miR-802 also markedly reduced the tumor growth of cervical cancer cell and decreased the expression of MYLIP. CONCLUSIONS MiR-802 inhibits the growth and metastatic-related phenotypes of cervical cancer cell through targeting MYLIP.
Collapse
Affiliation(s)
- Ming Ni
- Gynecological Department, Wuhan Hanyang Hospital, Wuhan, Hubei, China.,Gynecological Department, Wuhan Hanyang Hospital, Wuhan, Hubei, China
| | - Qin Yan
- Department of Oncology, Chengdu Fifth People's Hospital, Chengdu, Sichuan, China.,Gynecological Department, Wuhan Hanyang Hospital, Wuhan, Hubei, China
| | - Hui Xue
- Department of Gynecology, The Qingdao Hiser Hospital, Qingdao, Shandong, China
| | - Yanfang Du
- Department of Obstetrics and Gynecology, Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Shuangdan Zhao
- Department of Obstetrics and Gynecology, Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Zhiming Zhao
- Department of Reproductive Medicine, the Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| |
Collapse
|
7
|
Abstract
Flotillins 1 and 2 are two ubiquitous, highly conserved homologous proteins that assemble to form heterotetramers at the cytoplasmic face of the plasma membrane in cholesterol- and sphingolipid-enriched domains. Flotillin heterotetramers can assemble into large oligomers to form molecular scaffolds that regulate the clustering of at the plasma membrane and activity of several receptors. Moreover, flotillins are upregulated in many invasive carcinomas and also in sarcoma, and this is associated with poor prognosis and metastasis formation. When upregulated, flotillins promote plasma membrane invagination and induce an endocytic pathway that allows the targeting of cargo proteins in the late endosomal compartment in which flotillins accumulate. These late endosomes are not degradative, and participate in the recycling and secretion of protein cargos. The cargos of this Upregulated Flotillin–Induced Trafficking (UFIT) pathway include molecules involved in signaling, adhesion, and extracellular matrix remodeling, thus favoring the acquisition of an invasive cellular behavior leading to metastasis formation. Thus, flotillin presence from the plasma membrane to the late endosomal compartment influences the activity, and even modifies the trafficking and fate of key protein cargos, favoring the development of diseases, for instance tumors. This review summarizes the current knowledge on flotillins and their role in cancer development focusing on their function in cellular membrane remodeling and vesicular trafficking regulation.
Collapse
|
8
|
Parol M, Gzil A, Bodnar M, Grzanka D. Systematic review and meta-analysis of the prognostic significance of microRNAs related to metastatic and EMT process among prostate cancer patients. J Transl Med 2021; 19:28. [PMID: 33413466 PMCID: PMC7788830 DOI: 10.1186/s12967-020-02644-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 11/27/2020] [Indexed: 02/07/2023] Open
Abstract
The ability of tumor cells to spread from their origin place and form secondary tumor foci is determined by the epithelial-mesenchymal transition process. In epithelial tumors such as prostate cancer (PCa), the loss of intercellular interactions can be observed as a change in expression of polarity proteins. Epithelial cells acquire ability to migrate, what leads to the formation of distal metastases. In recent years, the interest in miRNA molecules as potential future treatment options has increased. In tumor microenvironment, miRNAs have the ability to regulate signal transduction pathways, where they can act as suppressors or oncogenes. MiRNAs are secreted by cancer cells, and the changes in their expression levels are closely related to a cancer progression, including epithelial-mesenchymal transition. These molecules offer new diagnostic and therapeutic possibilities. Therapeutics which make use of synthesized RNA fragments and mimic or block miRNAs affected in PCa, may lead to inhibition of tumor progression and even disease re-emission. Based on appropriate qualification criteria, we conducted a selection process to identify scientific articles describing miRNAs and their relation to epithelial-mesenchymal transition in PCa patients. The studies were published in English on Pubmed, Scopus and the Web of Science before August 08, 2019. Hazard ratios (HRs) and 95% confidence intervals (CI) as well as total Gleason score were used to assess the concordance between miRNAs and presence of metastases. A total of 13 studies were included in our meta-analysis, representing 1608 PCa patients and 15 miRNA molecules. Our study clarifies a relationship between the clinicopathological features of PCa and the aberrant expression of several miRNA as well as the complex mechanism of miRNA molecules involvement in the induction and promotion of the metastatic mechanism in PCa.
Collapse
Affiliation(s)
- Martyna Parol
- Department of Clinical Pathomorphology, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, 9 Curie-Sklodowskiej Street, 85-094 Bydgoszcz, Poland
| | - Arkadiusz Gzil
- Department of Clinical Pathomorphology, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, 9 Curie-Sklodowskiej Street, 85-094 Bydgoszcz, Poland
| | - Magdalena Bodnar
- Department of Clinical Pathomorphology, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, 9 Curie-Sklodowskiej Street, 85-094 Bydgoszcz, Poland
| | - Dariusz Grzanka
- Department of Clinical Pathomorphology, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, 9 Curie-Sklodowskiej Street, 85-094 Bydgoszcz, Poland
| |
Collapse
|
9
|
Yang T, Guo Q, Li D, Bai G, Sun H, Wang W. MicroRNA-802 Suppresses Tumorigenesis of Colorectal Cancer via Regulating UBN2. Cancer Manag Res 2020; 12:11219-11230. [PMID: 33177873 PMCID: PMC7649241 DOI: 10.2147/cmar.s267345] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Accepted: 10/01/2020] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND The initiation and progression of colorectal cancer (CRC) are a multistep complex process regulated by multiple factors. Previous evidence indicated that microRNA-802 (miR-802) participated in tumorigenesis of numerous solid cancers; however, the potential roles and underlying mechanisms of miR‑802 in CRC still need further exploration. METHODS Quantitative real-time PCR (qRT-PCR) was employed to evaluate miR-802 levels in human CRC tissues and cell lines. In vitro proliferation, apoptosis, migration and invasion assays, and in vivo subcutaneous mouse xenograft model were utilized to examine the effects of miR-802 on the malignant behaviors of CRC cells. Then, bioinformatics prediction, dual-luciferase reporter, qRT-PCR, and Western blot was conducted to confirm the down-stream target of miR-802. RESULTS MiR-802 was frequently down-regulated in CRC tissues and cells. Further analyses showed that the low expression of miR-802 in CRC tissues was significantly correlated with tumor progression and poor patients' prognosis. Overexpression of miR-802 profoundly inhibited proliferation, migration and invasion but promoted apoptosis of CRC cells, by contrast, miR-802 silencing exhibited opposite effects in vitro. Further animal experiment demonstrated that miR-802 could suppress tumor growth via inhibiting the proliferation and promoting the apoptosis of CRC cells in vivo. Mechanistically, miR-802 functioned as a tumor suppressor through inhibiting the expression of Ubinuclein-2 (UBN2) on post-transcriptional level. Moreover, upregulation of UBN2 expression could reverse the biological effects of CRC cells induced by miR-802 overexpression. CONCLUSION Our study demonstrates that miR-802 inhibits the proliferation, migration and invasion while promotes the apoptosis of CRC cells via directly suppressing UBN2 expression. These findings provide a promising biomarker and potential treatment target for CRC.
Collapse
Affiliation(s)
- Tao Yang
- Department of General Surgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121001, People's Republic of China
| | - Qiuying Guo
- Operating Room, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121001, People's Republic of China
| | - Dongsheng Li
- Department of General Surgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121001, People's Republic of China
| | - Guang Bai
- Department of General Surgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121001, People's Republic of China
| | - Hongzhi Sun
- Department of General Surgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121001, People's Republic of China
| | - Wei Wang
- Department of General Surgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121001, People's Republic of China
| |
Collapse
|
10
|
Feng H, Liu L, Xu L, Wang H, Hua Q, He P. MiR-802 Suppresses Colorectal Cancer Cell Viability, Migration and Invasion by Targeting RAN. Cancer Manag Res 2020; 12:2291-2300. [PMID: 32273766 PMCID: PMC7105370 DOI: 10.2147/cmar.s231709] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 02/21/2020] [Indexed: 11/24/2022] Open
Abstract
Purpose Colorectal cancer is one of the most malignant tumors in the world, and the incidence is increasing every year. MicroRNAs (miRNA) are small non-coding RNAs that are involved in a variety of physiological or pathological processes. Abnormal expression of microRNA-802 (miR-802) has been demonstrated in various types of cancer. However, the expression and biological role of miR-802 in human colorectal cancer remain largely unknown. Methods Here, we used quantitative real-time PCR (qRT-PCR) to measure miR-802 expression levels in colorectal cancer tissues and cell lines. Cell Counting Kit-8 (CCK-8) was used to assess the effect of miR-802 on colorectal cancer cell viability. Migration and invasion assays were performed to determine the effect of miR-802 on metastasis of colon tumor cells by transwell analysis. Luciferase activity assays were used to confirm the target of miR-802. Results The results show that miR-802 is significantly downregulated in colorectal cancer tissues and cell lines. Overexpression of miR-802 profoundly inhibited viability, migration and invasion of colorectal cancer cells. In addition, we have newly discovered that the Ras-associated nucleus (RAN) is a direct target of miR-802 which could reverse the effects induced by miR-802 overexpression in colorectal cancer cells. Conclusion In conclusion, our study shows that miR-802 is downregulated in colorectal cancer, and overexpression of miR-802 inhibits colorectal cancer cell viability, migration and invasion by directly targeting RAN.
Collapse
Affiliation(s)
- Hailong Feng
- Department of General Surgery, The First Affiliated Hospital of Xinxiang Medical University, Weihui City, Henan Province 453100, People's Republic of China
| | - Lingling Liu
- Department of General Surgery, The First Affiliated Hospital of Xinxiang Medical University, Weihui City, Henan Province 453100, People's Republic of China
| | - Laijing Xu
- Department of General Surgery, The First Affiliated Hospital of Xinxiang Medical University, Weihui City, Henan Province 453100, People's Republic of China
| | - Haili Wang
- Department of General Surgery, The First Affiliated Hospital of Xinxiang Medical University, Weihui City, Henan Province 453100, People's Republic of China
| | - Qiuju Hua
- Hospital of Nephrology, The First Affiliated Hospital of Xinxiang Medical University, Weihui City, Henan Province 453100, People's Republic of China
| | - Peng He
- Department of General Surgery, The First Affiliated Hospital of Xinxiang Medical University, Weihui City, Henan Province 453100, People's Republic of China
| |
Collapse
|
11
|
Sereno M, Haskó J, Molnár K, Medina SJ, Reisz Z, Malhó R, Videira M, Tiszlavicz L, Booth SA, Wilhelm I, Krizbai IA, Brito MA. Downregulation of circulating miR 802-5p and miR 194-5p and upregulation of brain MEF2C along breast cancer brain metastasization. Mol Oncol 2020; 14:520-538. [PMID: 31930767 PMCID: PMC7053247 DOI: 10.1002/1878-0261.12632] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 10/31/2019] [Accepted: 01/08/2020] [Indexed: 12/18/2022] Open
Abstract
Breast cancer brain metastases (BCBMs) have been underinvestigated despite their high incidence and poor outcome. MicroRNAs (miRNAs), and particularly circulating miRNAs, regulate multiple cellular functions, and their deregulation has been reported in different types of cancer and metastasis. However, their signature in plasma along brain metastasis development and their relevant targets remain undetermined. Here, we used a mouse model of BCBM and next‐generation sequencing (NGS) to establish the alterations in circulating miRNAs during brain metastasis formation and development. We further performed bioinformatics analysis to identify their targets with relevance in the metastatic process. We additionally analyzed human resected brain metastasis samples of breast cancer patients for target expression validation. Breast cancer cells were injected in the carotid artery of mice to preferentially induce metastasis in the brain, and samples were collected at different timepoints (5 h, 3, 7, and 10 days) to follow metastasis development in the brain and in peripheral organs. Metastases were detected from 7 days onwards, mainly in the brain. NGS revealed a deregulation of circulating miRNA profile during BCBM progression, rising from 18% at 3 days to 30% at 10 days following malignant cells’ injection. Work was focused on those altered prior to metastasis detection, among which were miR‐802‐5p and miR‐194‐5p, whose downregulation was validated by qPCR. Using targetscan and diana tools, the transcription factor myocyte enhancer factor 2C (MEF2C) was identified as a target for both miRNAs, and its expression was increasingly observed in malignant cells along brain metastasis development. Its upregulation was also observed in peritumoral astrocytes pointing to a role of MEF2C in the crosstalk between tumor cells and astrocytes. MEF2C expression was also observed in human BCBM, validating the observation in mouse. Collectively, downregulation of circulating miR‐802‐5p and miR‐194‐5p appears as a precocious event in BCBM and MEF2C emerges as a new player in brain metastasis development.
Collapse
Affiliation(s)
- Marta Sereno
- Faculdade de Farmácia, Research Institute for Medicines (iMed.ULisboa), Universidade de Lisboa, Portugal
| | - János Haskó
- Institute of Biophysics, Biological Research Centre, Szeged, Hungary
| | - Kinga Molnár
- Institute of Biophysics, Biological Research Centre, Szeged, Hungary
| | - Sarah J Medina
- Prion Diseases Section, Public Health Agency of Canada, National Microbiology Laboratory, Winnipeg, MB, Canada
| | - Zita Reisz
- Department of Pathology, University of Szeged, Hungary
| | - Rui Malhó
- Faculdade de Ciências, BioISI, Instituto de Biossistemas e Ciências Integrativas, Universidade de Lisboa, Portugal
| | - Mafalda Videira
- Faculdade de Farmácia, Research Institute for Medicines (iMed.ULisboa), Universidade de Lisboa, Portugal.,Department of Galenic Pharmacy and Pharmaceutical Technology, Faculdade de Farmácia, Universidade de Lisboa, Portugal
| | | | - Stephanie A Booth
- Prion Diseases Section, Public Health Agency of Canada, National Microbiology Laboratory, Winnipeg, MB, Canada.,Department of Medical Microbiology and Infectious Diseases, Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Imola Wilhelm
- Institute of Biophysics, Biological Research Centre, Szeged, Hungary.,Institute of Life Sciences, Vasile Goldiş Western University of Arad, Romania
| | - István A Krizbai
- Institute of Biophysics, Biological Research Centre, Szeged, Hungary.,Institute of Life Sciences, Vasile Goldiş Western University of Arad, Romania
| | - Maria Alexandra Brito
- Faculdade de Farmácia, Research Institute for Medicines (iMed.ULisboa), Universidade de Lisboa, Portugal.,Department of Biochemistry and Human Biology, Faculdade de Farmmácia, Universidade de Lisboa, Portugal
| |
Collapse
|
12
|
Xu Z, Wang T, Song H, Jiang X. Flotillin-2 predicts poor prognosis and promotes tumor invasion in intrahepatic cholangiocarcinoma. Oncol Lett 2020; 19:2243-2250. [PMID: 32194722 PMCID: PMC7039164 DOI: 10.3892/ol.2020.11349] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Accepted: 01/14/2020] [Indexed: 12/12/2022] Open
Abstract
Intrahepatic cholangiocarcinoma (iCCA) is a highly malignant neoplasm arising from the intrahepatic bile ducts. As a scaffold protein of lipid rafts, flotillin-2 is upregulated in several types of cancer and promotes tumor progression and metastasis. To the best of our knowledge, the present study was the first to detect the upregulation of flotillin-2 in iCCA tissues compared with matched adjacent non-tumor tissues. In addition, immunohistochemistry was used to investigate the expression of flotillin-2 in a microarray consisting of 92 iCCA tissues. A total of 59 samples (64.1%) exhibited high flotillin-2 expression, which was significantly related to lymph node metastasis (P=0.029) and tumor-node-metastasis stage (P=0.016). Further in vitro study demonstrated that knockdown of flotillin-2 inhibited the invasive capability of iCCA cell lines, further supporting the participation of flotillin-2 in cancer invasion and metastasis. Moreover, Kaplan-Meier analysis showed patients with high flotillin-2 expression had worse overall survival outcomes. The multivariate Cox proportional hazards model further revealed that high flotillin-2 expression was an independent indicator (P=0.005) of poor prognosis for patients with iCCA. Collectively, the present study revealed that as a promoter of invasion and an independent marker of poor prognosis, flotillin-2 may serve as a potential target for the development of novel therapeutic agents for iCCA.
Collapse
Affiliation(s)
- Zhiying Xu
- Department of Nuclear Medicine, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, Shandong 264001, P.R. China
| | - Tao Wang
- Department of Interventional Therapy, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, Shandong 264001, P.R. China
| | - Haiyang Song
- Department of Interventional Therapy, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, Shandong 264001, P.R. China
| | - Xuewen Jiang
- Department of Nuclear Medicine, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, Shandong 264001, P.R. China
| |
Collapse
|
13
|
MiR-802 alleviates lipopolysaccharide-induced acute lung injury by targeting Peli2. Inflamm Res 2019; 69:75-85. [PMID: 31696241 PMCID: PMC7223969 DOI: 10.1007/s00011-019-01295-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 10/06/2019] [Accepted: 10/22/2019] [Indexed: 12/17/2022] Open
Abstract
Introduction Acute respiratory distress syndrome (ARDS) is a life-threatening medical condition. It is characterized by serious lung inflammation or injury. Characterizing novel miRNAs implicated in ARDS pathogenesis may provide new therapeutic strategy for managing ARDS. Methods We employed LPS-induced lung injury model to profile miRNAs associated with ARDS. We isolated one miRNA candidate and characterized its role in lipopolysaccharide (LPS)-induced proinflammatory cytokine production in lung macrophages. We further evaluated its functional role in ARDS model by assessing histological change, neutrophil activation, tissue permeability and tumor necrosis factor alpha (TNFα) production. We also characterized its downstream target using luciferase assay, Western blotting, enzyme-linked immunosorbent assay and cell inflammation assay. Results Microarray profiling revealed miR-802 was significantly downregulated in ARDS mouse model. LPS-induced miR-802 downregulation was confirmed in lung macrophages. Overexpression of miR-802 significantly suppressed LPS-induced inflammatory cytokine production in vitro and alleviates LPS-induced acute lung injury in vivo. Peli2 was identified as a downstream target of miR-802 and found upregulated in ARDS model. Overexpressing Peli2 abolished the antagonizing effect of miR-802 on LPS-mediated inflammatory response. Conclusion MiR-802 carried a protective role against LPS-induced acute lung injury by downregulating Peli2. MiR-802/Peli2 axis may act as intervening targets to manage ARDS.
Collapse
|
14
|
Yang B, Sun L, Liang L. MiRNA-802 suppresses proliferation and migration of epithelial ovarian cancer cells by targeting YWHAZ. J Ovarian Res 2019; 12:100. [PMID: 31640760 PMCID: PMC6806521 DOI: 10.1186/s13048-019-0576-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 09/27/2019] [Indexed: 12/18/2022] Open
Abstract
Background The imbalance of expression of microRNA-802 may have a significant place in tumor progression. However, the bio-function of epithelial ovarian cancer cells remains unclear. Therefore, we setup this study to explore the pathogenesis of epithelial ovarian cancer based on microRNA-802. Methods RT-qPCR analysis was used to measure the expression level of microRNA802 and YWHAZ in epithelial ovarian cancer. CCK-8, colony formation, flow cytometry and transwell assay were used to detect the effects of microRNA-802 on cell proliferation, apoptosis, invasion and migration. Target gene prediction and screening, luciferase reporting experiments were applied to validate the downstream target genes of microRNA-802. The effects of microRNA-802 on the expression of YWHAZ and its biological effects were measured by Western blotting and RT-qPCR. Results Compared with normal cell lines and tissues, the expression level of microRNA-802 was obviously down-regulated in cancer related cell lines and tissues. Overexpression of microRNA-802 could obviously inhibit the invasion and proliferation and induce apoptosis. In addition, YWHAZ was the binding target protein of miR-802 for epithelial ovarian cancer cells. YWHAZ was obviously up-regulated in human epithelial ovarian cancer cells, and YWHAZ was negatively correlated with the expression of miR-802. YWHAZ can partly eliminate the inhibitory effect caused by overexpression of miR-802 on growth and metastasis of epithelial ovarian cancer cells. Conclusion miR-802 can regulate the occurrence and development of epithelial ovarian cancer by targeting YWHAZ.
Collapse
Affiliation(s)
- Bo Yang
- Department of Obstetrics and Gynecology, Bethune International Peace Hospital, 398 Zhongshan West Road, Shijiazhuang, 050000, Hebei Province, China.
| | - Li Sun
- Department of Obstetrics and Gynecology, Bethune International Peace Hospital, 398 Zhongshan West Road, Shijiazhuang, 050000, Hebei Province, China
| | - Lei Liang
- Department of Obstetrics and Gynecology, Bethune International Peace Hospital, 398 Zhongshan West Road, Shijiazhuang, 050000, Hebei Province, China
| |
Collapse
|
15
|
Basu R, Kopchick JJ. The effects of growth hormone on therapy resistance in cancer. CANCER DRUG RESISTANCE (ALHAMBRA, CALIF.) 2019; 2:827-846. [PMID: 32382711 PMCID: PMC7204541 DOI: 10.20517/cdr.2019.27] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Pituitary derived and peripherally produced growth hormone (GH) is a crucial mediator of longitudinal growth, organ development, metabolic regulation with tissue specific, sex specific, and age-dependent effects. GH and its cognate receptor (GHR) are expressed in several forms of cancer and have been validated as an anti-cancer target through a large body of in vitro, in vivo and epidemiological analyses. However, the underlying molecular mechanisms of GH action in cancer prognosis and therapeutic response had been sparse until recently. This review assimilates the critical details of GH-GHR mediated therapy resistance across different cancer types, distilling the therapeutic implications based on our current understanding of these effects.
Collapse
Affiliation(s)
- Reetobrata Basu
- Ohio University Heritage College of Osteopathic Medicine (OU-HCOM), Ohio University, Athens, OH 45701, USA.,Edison Biotechnology Institute, Ohio University, Athens, OH 45701, USA
| | - John J Kopchick
- Ohio University Heritage College of Osteopathic Medicine (OU-HCOM), Ohio University, Athens, OH 45701, USA.,Edison Biotechnology Institute, Ohio University, Athens, OH 45701, USA
| |
Collapse
|
16
|
Gao F, Wu H, Wang R, Guo Y, Zhang Z, Wang T, Zhang G, Liu C, Liu J. MicroRNA-485-5p suppresses the proliferation, migration and invasion of small cell lung cancer cells by targeting flotillin-2. Bioengineered 2019; 10:1-12. [PMID: 30836864 PMCID: PMC6527069 DOI: 10.1080/21655979.2019.1586056] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Abstract
This study is aimed to elucidate the mechanisms underlying the role of miR-485-5p in small cell lung cancer (SCLC). The expression of miR-485-5p were quantified with real time quantitative PCR and it was found that the level of miR-485-5p was lower in SCLC tissues than normal tissues. In cultured SCLC cell lines, overexpression of miR-485-5p reduced cell proliferation, migration, and invasion in vitro, whereas knockdown of miR-485-5p performed contrary. FLOT2 expression was obviously upregulated and negatively correlated with miR-485-5p expression level in SCLC tissues. Overexpression of miR-485-5p significantly inhibited the protein expression of flotillin-2 (FLOT2) in cultured SCLC cells. Luciferase reporter assay confirmed that FLOT2 was a direct target of miR-485-5p in SCLC cells. It is concluded that miR-485-5p, as a tumor suppressor, inhibits the growth and metastasis in SCLC by targeting FLOT2. Upregulation of miR-485-5p expression may be an attractive strategy for SCLC therapy.
Collapse
Affiliation(s)
- Feng Gao
- a Department of Thoracic Surgery , the Fourth Hospital of Hebei Medical University , Shijiazhuang , China
| | - Hao Wu
- b Department of Clinical Laboratory , Hebei Medical University , Shijiazhuang , China
| | - Rui Wang
- a Department of Thoracic Surgery , the Fourth Hospital of Hebei Medical University , Shijiazhuang , China
| | - Yang Guo
- a Department of Thoracic Surgery , the Fourth Hospital of Hebei Medical University , Shijiazhuang , China
| | - Zefeng Zhang
- a Department of Thoracic Surgery , the Fourth Hospital of Hebei Medical University , Shijiazhuang , China
| | - Tao Wang
- a Department of Thoracic Surgery , the Fourth Hospital of Hebei Medical University , Shijiazhuang , China
| | - Guoliang Zhang
- a Department of Thoracic Surgery , the Fourth Hospital of Hebei Medical University , Shijiazhuang , China
| | - Changjiang Liu
- a Department of Thoracic Surgery , the Fourth Hospital of Hebei Medical University , Shijiazhuang , China
| | - Junfeng Liu
- a Department of Thoracic Surgery , the Fourth Hospital of Hebei Medical University , Shijiazhuang , China
| |
Collapse
|
17
|
Chen SH, Liu XN, Peng Y. MicroRNA-351 eases insulin resistance and liver gluconeogenesis via the PI3K/AKT pathway by inhibiting FLOT2 in mice of gestational diabetes mellitus. J Cell Mol Med 2019; 23:5895-5906. [PMID: 31287224 PMCID: PMC6714143 DOI: 10.1111/jcmm.14079] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 10/10/2018] [Accepted: 11/13/2018] [Indexed: 12/29/2022] Open
Abstract
Gestational diabetes mellitus (GDM) is known as different degree glucose intolerance that is initially identified during pregnancy. MicroRNAs (miRs) may be a potential candidate for treatment of GDM. Herein, we suggested that miR‐351 could be an inhibitor in the progression of GDM via the phosphoinositide 3‐kinase/protein kinase B (PI3K/AKT) pathway. Microarray analysis was used to identify differentially expressed genes and predict miRs regulating flotillin 2 (FLOT2). Target relationship between miR‐351 and FLOT2 was verified. Gestational diabetes mellitus mice were treated with a series of mimic, inhibitor and small interfering RNA to explore the effect of miR‐351 on insulin resistance (IR), cell apoptosis in pancreatic tissues and liver gluconeogenesis through evaluating GDM‐related biochemical indexes, as well as expression of miR‐351, FLOT2, PI3K/AKT pathway‐, IR‐ and liver gluconeogenesis‐related genes. MiR‐351 and FLOT2 were reported to be involved in GDM. FLOT2 was the target gene of miR‐351. Gestational diabetes mellitus mice exhibited IR and liver gluconeogenesis, up‐regulated FLOT2, activated PI3K/AKT pathway and down‐regulated miR‐351 in liver tissues. Additionally, miR‐351 overexpression and FLOT2 silencing decreased the levels of FLOT2, phosphoenolpyruvate carboxykinase, glucose‐6‐phosphatase, fasting blood glucose, fasting insulin, total cholesterol, triglyceride, glyeosylated haemoglobin and homeostasis model of assessment for IR index (HOMA‐IR), extent of PI3K and AKT phosphorylation, yet increased the levels of HOMA for islet β‐cell function, HOMA for insulin sensitivity index and glucose transporter 2 expression, indicating reduced cell apoptosis in pancreatic tissues and alleviated IR and liver gluconeogenesis. Our results reveal that up‐regulation of miR‐351 protects against IR and liver gluconeogenesis by repressing the PI3K/AKT pathway through regulating FLOT2 in GDM mice, which identifies miR‐351 as a potential therapeutic target for the clinical management of GDM.
Collapse
Affiliation(s)
- Shu-Hong Chen
- Department of Endocrinology, Linyi People's Hospital, Linyi, Shandong Province, P.R. China
| | - Xiao-Nan Liu
- Department of Endocrinology, Linyi People's Hospital, Linyi, Shandong Province, P.R. China
| | - Yan Peng
- Department of Endocrinology, Linyi People's Hospital, Linyi, Shandong Province, P.R. China
| |
Collapse
|
18
|
Jiang C, Liu X, Wang M, Lv G, Wang G. High Blood miR-802 Is Associated With Poor Prognosis in HCC Patients by Regulating DNA Damage Response 1 (REDD1)-Mediated Function of T Cells. Oncol Res 2019; 27:1025-1034. [PMID: 30982498 PMCID: PMC7848258 DOI: 10.3727/096504018x15456687424096] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
miR-802 has been reported to be dysregulated in multiple tumors and contribute to tumor progression. However, its role in HCC was still largely unknown. The aim of this study is to investigate the function and mechanism of miR-802 in HCC progression. The results showed that miR-802 was upregulated in the peripheral blood and tumor tissue of HCC patients, and high levels of blood miR-802 predicted poor prognosis. miR-802 had no effect on the proliferation and migration of HCC cell lines. Interestingly, the levels of CD8/CD28 and regulated in development and DNA damage response 1 (REDD1) were declined along with the upregulation of miR-802 in vivo. Hence, it is speculated that miR-802 participated in the regulation of T-cell function in HCC patients. Furthermore, we demonstrated that mir-802 directly targets REDD1 and inhibited its expression. miR-802 increased the expression of programmed cell death protein 1 (PD-1) and decreased the expression of interferon-γ (IFN-γ) and CD8+CD28+ T-cell number. In conclusion, miR-802 was involved in T-cell exhaustion through posttranscriptionally suppressing REDD1, which might offer the suppressive effect of miR-802 on HCC progression.
Collapse
Affiliation(s)
- Chao Jiang
- Department of Hepatobiliary Pancreatic Surgery, First Hospital of Jilin University, Changchun, P.R. China
| | - Xueyan Liu
- Department of Cardiology, China-Japan Union Hospital of Jilin University, Changchun, P.R. China
| | - Meng Wang
- Department of Hepatobiliary Pancreatic Surgery, First Hospital of Jilin University, Changchun, P.R. China
| | - Guoyue Lv
- Department of Hepatobiliary Pancreatic Surgery, First Hospital of Jilin University, Changchun, P.R. China
| | - Guangyi Wang
- Department of Hepatobiliary Pancreatic Surgery, First Hospital of Jilin University, Changchun, P.R. China
| |
Collapse
|
19
|
Zhang J, Li J, Li S, Zhou C, Qin Y, Li X. miR‑802 inhibits the aggressive behaviors of non‑small cell lung cancer cells by directly targeting FGFR1. Int J Oncol 2019; 54:2211-2221. [PMID: 30942425 DOI: 10.3892/ijo.2019.4765] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Accepted: 01/31/2019] [Indexed: 11/05/2022] Open
Abstract
Emerging reports have revealed that several microRNAs (miRNAs) are abnormally expressed in non‑small cell lung cancer (NSCLC). miRNAs have been identified as oncogenes or tumor suppressors, and regulate various biological processes including oncogenesis and development. miR‑802 is dysregulated in multiple types of human cancer, and exerts tumor‑suppressive or promoting roles. However, the expression levels and functional roles of miR‑802 in NSCLC remain largely unknown. In the present study, miR‑802 expression was demonstrated to be decreased in NSCLC tissues and cell lines. A low miR‑802 expression was significantly correlated with the tumor stage, lymph node metastasis and brain metastasis in NSCLC patients. Restoring miR‑802 expression inhibited NSCLC cell proliferation and colony formation, induced cell apoptosis, decreased cell migration and invasion in vitro, and hindered in vivo tumor growth. Mechanistically, fibroblast growth factor receptor 1 (FGFR1) was confirmed as the target gene of miR‑802 in NSCLC cells. In addition, FGFR1 silencing mimicked the tumor‑suppressing roles of miR‑802 upregulation in NSCLC cells. Furthermore, rescue experiments revealed that FGFR1 reintroduction rescued the miR‑802‑induced inhibition of the malignant phenotypes in NSCLC cells. Notably, miR‑802 was able to deactivate the phosphoinositide 3‑kinase (PI3K)/AKT serine/threonine kinase (Akt)/mammalian target of rapamycin (mTOR) pathway in NSCLC cells in vitro and in vivo. Overall, these results demonstrated that miR‑802 could downregulate FGFR1 expression, thereby deactivating the PI3K/Akt/mTOR pathway and inhibiting the malignant development of NSCLC. Thus, miR‑802 may be a therapeutic candidate for patients with NSCLC.
Collapse
Affiliation(s)
- Jiexia Zhang
- Guangzhou Institute of Respiratory Disease, State Key Laboratory of Respiratory Disease, Department of Respiration, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510120, P.R. China
| | - Jun Li
- Department of Neurosurgery, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, 200240, P.R. China
| | - Shiyue Li
- Guangzhou Institute of Respiratory Disease, State Key Laboratory of Respiratory Disease, Department of Respiration, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510120, P.R. China
| | - Chengzhi Zhou
- Guangzhou Institute of Respiratory Disease, State Key Laboratory of Respiratory Disease, Department of Respiration, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510120, P.R. China
| | - Yinyin Qin
- Guangzhou Institute of Respiratory Disease, State Key Laboratory of Respiratory Disease, Department of Respiration, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510120, P.R. China
| | - Xiaoxiang Li
- Guangzhou Institute of Respiratory Disease, State Key Laboratory of Respiratory Disease, Department of Respiration, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510120, P.R. China
| |
Collapse
|
20
|
Prahm KP, Høgdall C, Karlsen MA, Christensen IJ, Novotny GW, Høgdall E. Identification and validation of potential prognostic and predictive miRNAs of epithelial ovarian cancer. PLoS One 2018; 13:e0207319. [PMID: 30475821 PMCID: PMC6261038 DOI: 10.1371/journal.pone.0207319] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2018] [Accepted: 10/29/2018] [Indexed: 12/17/2022] Open
Abstract
Background Ovarian cancer is the leading cause of death by gynecologic cancers in the Western world. The aim of the study was to identify microRNAs (miRNAs) associated with prognosis and/or resistance to chemotherapy among patients with epithelial ovarian cancer. Methods Using information from the Pelvic Mass Study we identified a cohort of women with epithelial ovarian cancer. Tumor tissues were then collected and analyzed by global miRNA microarrays. MiRNA profiling was then linked to survival and time to progression using Cox proportional-hazards regression models. Logistic regression models were used for the analysis of resistance to chemotherapy. Our results were validated using external datasets retrieved from the NCBI Gene Expression Omnibus database. Results A total of 197 patients with epithelial ovarian cancer were included for miRNA microarray analysis. In multivariate analyses we identified a number of miRNAs significantly correlated with overall survival (miR-1183 (HR: 1.42, 95% CI:1.17–1.74, p = 0.0005), miR-126-3p (HR: 1.38, 95% CI:1.11–1.71, p = 0.0036), time to progression (miR-139-3p (HR: 1.48, 95% CI: 1.13–1.94, p = 0.0047), miR-802 (HR: 0.48, 95% CI: 0.29–0.78, p = 0.0035)), progression free survival (miR-23a-5p (HR:1.32, 95% CI:1.09–1.61, p = 0.004), miR-23a-3p (HR:1.70, 95% CI:1.15–2.51, p = 0.0074), miR-802 (HR: 0.48, 95% CI: 0.29–0.80, p = 0.0048)), and resistance to chemotherapy (miR-1234 (HR: 0.26, 95% CI: 0.11–0.64, p = 0.003)). A few miRNAs identified in our training cohort, were validated in external cohorts with similar results. Conclusion Eight miRNAs were identified as significant predictors of overall survival, progression free survival, time to progression, and chemotherapy resistance. A number of these miRNAs were significantly validated using external datasets. Inter-platform and inter-laboratory variations may have influence on the ability to compare and reproduce miRNA results. The use of miRNAs as potential markers of relapse and survival in ovarian cancer warrants further investigation.
Collapse
Affiliation(s)
- Kira Philipsen Prahm
- Department of Pathology, Molecular unit, Danish CancerBiobank, Herlev University Hospital, Herlev, Denmark
- Gynecological Clinic, The Juliane Marie Center, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
- * E-mail:
| | - Claus Høgdall
- Gynecological Clinic, The Juliane Marie Center, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Mona Aarenstrup Karlsen
- Department of Pathology, Molecular unit, Danish CancerBiobank, Herlev University Hospital, Herlev, Denmark
- Gynecological Clinic, The Juliane Marie Center, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Ib Jarle Christensen
- Department of Pathology, Molecular unit, Danish CancerBiobank, Herlev University Hospital, Herlev, Denmark
| | - Guy Wayne Novotny
- Department of Pathology, Molecular unit, Danish CancerBiobank, Herlev University Hospital, Herlev, Denmark
| | - Estrid Høgdall
- Department of Pathology, Molecular unit, Danish CancerBiobank, Herlev University Hospital, Herlev, Denmark
| |
Collapse
|
21
|
Yu JJ, Pi WS, Cao Y, Peng AF, Cao ZY, Liu JM, Huang SH, Liu ZL, Zhang W. Let-7a inhibits osteosarcoma cell growth and lung metastasis by targeting Aurora-B. Cancer Manag Res 2018; 10:6305-6315. [PMID: 30568492 PMCID: PMC6267740 DOI: 10.2147/cmar.s185090] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Purpose Accumulating studies showed that the expression of microRNAs (miRNAs) was dysregulated in osteosarcoma (OS). In this study, we sought to investigate the effect of let-7a on OS progression and its potential molecular mechanism. Patients and methods Quantitative real-time PCR (qRT-PCR) was performed to evaluate the expression level of let-7a and Aurora-B (AURKB) in OS tissues and cells. The OS cells were treated with let-7a mimic, let7a inhibitor, negative mimic and Lv-AURKB combined with let-7a. The ability of cell proliferation, migration and invasion was measured using Cell Counting Kit-8 (CCK-8) and wound-healing and transwell invasion assays. The protein of AURKB, NF-κβp65, MMP2 and MMP9 was measured by Western blot analysis. Xenograft model was performed to investigate the effects of let-7a on tumor growth and metastasis. The lung metastasis was measured by counting the metastatic node using H&E staining. Results Let-7a expression was significantly underexpressed in OS cell lines and tissues compared with human osteoblast cell lines, hFOB1.19, and adjacent normal bone tissues. Exogenous let-7a inhibited the viability, migratory and invasive ability of OS cells in vitro. In addition, the overexpression of AURKB in OS cells could partly rescue let-7a-mediated tumor inhibition. Also, the overexpression of let-7a inhibited OS cell growth and lung metastasis in vivo. Furthermore, the results showed that let-7a could decrease the expression of NF-κβp65, MMP2 and MMP9 proteins by targeting AURKB in OS cells. Conclusion Let-7a inhibits the malignant phenotype of OS cells by targeting AURKB at least partially. Targeting let-7a and AURKB/NF-κβ may be a novel therapeutic strategy for the treatment of OS.
Collapse
Affiliation(s)
- Jing-Jing Yu
- Department of Respiratory Medicine, The First Affiliated Hospital of Nanchang University, Nanchang 330006, People's Republic of China,
| | - Wen-Sen Pi
- Department of Orthopedic Surgery, The First Affiliated Hospital of Nanchang University, Nanchang 330006, People's Republic of China,
| | - Yuan Cao
- Department of Medical Imaging, The First Clinical Medical School of Nanchang University, Nanchang 330006, People's Republic of China
| | - Ai-Fen Peng
- College of Humanities, Jiangxi University of Traditional Chinese Medicine, Nanchang 330001, People's Republic of China
| | - Zhi-Yuan Cao
- Department of Orthopedic Surgery, The First Affiliated Hospital of Nanchang University, Nanchang 330006, People's Republic of China,
| | - Jia-Ming Liu
- Department of Orthopedic Surgery, The First Affiliated Hospital of Nanchang University, Nanchang 330006, People's Republic of China,
| | - Shan-Hu Huang
- Department of Orthopedic Surgery, The First Affiliated Hospital of Nanchang University, Nanchang 330006, People's Republic of China,
| | - Zhi-Li Liu
- Department of Orthopedic Surgery, The First Affiliated Hospital of Nanchang University, Nanchang 330006, People's Republic of China,
| | - Wei Zhang
- Department of Respiratory Medicine, The First Affiliated Hospital of Nanchang University, Nanchang 330006, People's Republic of China,
| |
Collapse
|
22
|
Zhao B, Xu N, Li R, Yu F, Zhang F, Yang F, Ge X, Li YC, Du J. Vitamin D/VDR signaling suppresses microRNA-802-induced apoptosis of keratinocytes in oral lichen planus. FASEB J 2018; 33:1042-1050. [PMID: 30074824 DOI: 10.1096/fj.201801020rrr] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Vitamin D is known to play a protective role in inflammatory diseases. Although the suppressive effect of vitamin D/vitamin D receptor (VDR) signaling has been shown in the context of oral lichen planus (OLP), the molecular basis of its regulatory function remains poorly understood. Herein, we reported that miR-802 overexpression in OLP could aggravate apoptosis of oral keratinocytes by targeting B-cell lymphoma 2 mRNA. In addition, vitamin D/VDR signaling was able to suppress miR-802 expression in LPS-treated or activated CD4+ T cell-stimulated human oral keratinocytes by blocking NF-κB pathways, thereby inhibiting OLP apoptosis. Consistent with the results in vitro, we showed that miR-802 expression was enhanced in oral keratinocytes from VDR-/- mice, and an inverse correlation between VDR and miR-802 was found in human biopsy specimens of OLP. Collectively, our data suggest that vitamin D/VDR signaling suppresses oral keratinocyte apoptosis by targeting miR-802.-Zhao, B., Xu, N., Li, R., Yu, F., Zhang, F., Yang, F., Ge, X., Li, Y. C., Du, J. Vitamin D/VDR signaling suppresses microRNA-802-induced apoptosis of keratinocytes in oral lichen planus.
Collapse
Affiliation(s)
- Bin Zhao
- Department of Oral Medicine, Shanxi Medical University School and Hospital of Stomatology, Taiyuan, China; and
| | - Na Xu
- Department of Oral Medicine, Shanxi Medical University School and Hospital of Stomatology, Taiyuan, China; and
| | - Ran Li
- Department of Oral Medicine, Shanxi Medical University School and Hospital of Stomatology, Taiyuan, China; and
| | - Feiyan Yu
- Department of Oral Medicine, Shanxi Medical University School and Hospital of Stomatology, Taiyuan, China; and
| | - Fang Zhang
- Department of Oral Medicine, Shanxi Medical University School and Hospital of Stomatology, Taiyuan, China; and
| | - Fang Yang
- Department of Oral Medicine, Shanxi Medical University School and Hospital of Stomatology, Taiyuan, China; and
| | - Xuejun Ge
- Department of Oral Medicine, Shanxi Medical University School and Hospital of Stomatology, Taiyuan, China; and
| | - Yan Chun Li
- Division of Biological Sciences, Department of Medicine, The University of Chicago, Chicago, Illinois, USA
| | - Jie Du
- Department of Oral Medicine, Shanxi Medical University School and Hospital of Stomatology, Taiyuan, China; and.,Division of Biological Sciences, Department of Medicine, The University of Chicago, Chicago, Illinois, USA
| |
Collapse
|
23
|
Zhang S, Cai J, Xie W, Luo H, Yang F. miR-202 suppresses prostate cancer growth and metastasis by targeting PIK3CA. Exp Ther Med 2018; 16:1499-1504. [PMID: 30112070 DOI: 10.3892/etm.2018.6296] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 06/04/2018] [Indexed: 12/24/2022] Open
Abstract
MicroRNA (miR)-202 has been reported to be involved in the regulation of human cancer progression including bladder cancer, non-small cell lung cancer, pancreatic cancer and esophageal squamous cell carcinoma. However, the function of miR-202 in prostate cancer remains largely unknown. The present study demonstrated that miR-202 was downregulated in human prostate cancer tissues and cell lines. And overexpression of miR-202 significantly inhibited the proliferation, migration and invasion of prostate cancer cells, but induced cell apoptosis. Moreover, miR-202 suppressed tumor growth in vivo. Regarding the underlying mechanism, it was revealed that phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit α (PIK3CA) was a target gene of miR-202 in prostate cancer cells. Overexpression of miR-202 inhibited the mRNA and protein levels of PIK3CA in prostate cancer cells. Moreover, overexpression of PIK3CA abolished the inhibitory effects of miR-202 on prostate cancer cell proliferation, migration and invasion in vitro. Taken together, these findings demonstrated that miR-202 served as a tumor suppressor in prostate cancer by directly targeting PIK3CA.
Collapse
Affiliation(s)
- Shengping Zhang
- Department of Urology, The People's Hospital of Longhua, Shenzhen, Guangdong 518109, P.R. China
| | - Jiarong Cai
- Department of Urology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guandong 510630, P.R. China
| | - Wenjun Xie
- Department of Operating Room, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guandong 510630, P.R. China
| | - Hui Luo
- Department of Operating Room, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guandong 510630, P.R. China
| | - Fei Yang
- Department of Urology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guandong 510630, P.R. China
| |
Collapse
|
24
|
Zhao L, Li J, Liu Y, Zhou W, Shan Y, Fan X, Zhou X, Shan B, Song Y, Zhan Q. Flotillin1 promotes EMT of human small cell lung cancer via TGF-β signaling pathway. Cancer Biol Med 2018; 15:400-414. [PMID: 30766750 PMCID: PMC6372910 DOI: 10.20892/j.issn.2095-3941.2018.0053] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Objective Small cell lung carcinoma (SCLC) is considered one of the most aggressive types of lung cancer due to its rapid growth and early metastasis. No tumor markers or therapeutic targets have been demonstrated to be specific or effective in SCLC to date. This study aims to evaluate the potential of Flotillin1 (Flot1) as a target of SCLC treatment. Methods Flot1 expression level in the tissue of SCLC and other tissue of lung disease was detected using immunohistochemical staining. Transwell and Matrigel assays were employed to examine migration and invasion of cancer cells. Flow cytometry and xCELLigence system were used to evaluate cell apoptosis and cell viability, respectively. Expression levels of Flot1, epithelial-mesenchymal transition (EMT) marker E-cadherin, vimentin, cyclinD1, TGF-β-Smad2/3, and p-AKT were examined using Western blot. Furthermore, xenograft tumor in nude mice was used to evaluate the growth and metastasis of NCI-H446 cells in vivo. Results Our results demonstrated that Flot1 is highly expressed in SCLC samples and that its expression correlates strongly with clinical stage, distant metastasis, and poor survival. The knockdown of Flot1 decreased the growth, migration, and invasiveness of SCLC cells and reversed EMT phenotype in vitro and in vivo, while enhanced Flot1 expression exhibited the opposite behavior. Gene expression profile analysis demonstrated that Flot1-regulated genes frequently mapped to the AKT and TGF-β-Smad2/3 pathways. Our results further revealed that Flot1 affected the progression of SCLC via regulation of EMT progression. Conclusions These findings indicated an oncogenic role of Flot1 via promoting EMT in SCLC and suggested its potential as a tumor marker and prognostic indicator.
Collapse
Affiliation(s)
- Lianmei Zhao
- State Key Laboratory of Molecular Oncology, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100021, China.,Research Center, The Fourth Hospital of Hebei Medical University, Shijiazhuang 050011, China
| | - Jie Li
- Research Center, The Fourth Hospital of Hebei Medical University, Shijiazhuang 050011, China
| | - Yueping Liu
- Pathology Department, The Fourth Hospital of Hebei Medical University, Shijiazhuang 050011, China
| | - Wei Zhou
- State Key Laboratory of Molecular Oncology, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100021, China
| | - Yanan Shan
- Research Center, The Fourth Hospital of Hebei Medical University, Shijiazhuang 050011, China
| | - Xinyi Fan
- State Key Laboratory of Molecular Oncology, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100021, China
| | - Xinliang Zhou
- Research Center, The Fourth Hospital of Hebei Medical University, Shijiazhuang 050011, China
| | - Baoen Shan
- Research Center, The Fourth Hospital of Hebei Medical University, Shijiazhuang 050011, China
| | - Yongmei Song
- State Key Laboratory of Molecular Oncology, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100021, China
| | - Qimin Zhan
- State Key Laboratory of Molecular Oncology, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100021, China.,Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Laboratory of Molecular Oncology, Peking University Cancer Hospital & Institute, Beijing 100142, China
| |
Collapse
|
25
|
Lin N, Niu Y, Zhang W, Li X, Yang Z, Su Q. microRNA-802 is involved in palmitate-induced damage to pancreatic β cells through repression of sirtuin 6. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2017; 10:11300-11307. [PMID: 31966484 PMCID: PMC6965834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 08/12/2017] [Accepted: 10/30/2017] [Indexed: 06/10/2023]
Abstract
Free fatty acid (FFA)-induced pancreatic β-cell loss is implicated in the pathogenesis of type 2 diabetes mellitus (T2DM). It has been documented that circulating microRNA (miR)-802 levels are significantly greater in T2DM patients than in healthy subjects. However, the role of miR-802 in FFA-induced damage to β cells is still unclear. In the present study, we measured the expression of miR-802 in the INS-1 rat insulinoma cell line after palmitate treatment for 48 h. Gain- and loss-of-function studies were conducted to determine the function of miR-802 in palmitate-induced apoptosis and reactive oxygen species (ROS) production. The target gene(s) of miR-802 was functionally characterized. Compared to control cells, palmitate treatment caused a time- and concentration-dependent induction of miR-802 in INS-1 cells. Knockdown of miR-802 significantly blocked palmitate-induced apoptosis and attenuated ROS formation. Moreover, miR-802 downregulation prevented the reduction of prosurvival proteins Mcl-1 and Bcl-xL by palmitate. In contrast, ectopic expression of miR-802 stimulated apoptosis and ROS generation in INS-1 cells. Sirtuin 6 (SIRT6) was identified to be a direct target gene of miR-802. Overexpression of miR-802 suppressed the expression of SIRT6. Enforced expression of SIRT6 abolished the induction of apoptosis and ROS production by miR-802. Taken together, miR-802 is required for palmitate-induced damage to β cells by targeting SIRT6 and represents a potential therapeutic target for T2DM.
Collapse
Affiliation(s)
- Ning Lin
- Department of Endocrinology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai, China
| | - Yixin Niu
- Department of Endocrinology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai, China
| | - Weiwei Zhang
- Department of Endocrinology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai, China
| | - Xiaoyong Li
- Department of Endocrinology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai, China
| | - Zhen Yang
- Department of Endocrinology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai, China
| | - Qing Su
- Department of Endocrinology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai, China
| |
Collapse
|
26
|
Massillo C, Dalton GN, Farré PL, De Luca P, De Siervi A. Implications of microRNA dysregulation in the development of prostate cancer. Reproduction 2017; 154:R81-R97. [DOI: 10.1530/rep-17-0322] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 06/25/2017] [Accepted: 07/10/2017] [Indexed: 12/21/2022]
Abstract
MicroRNAs (miRNAs) are non-coding small RNAs that target mRNA to reduce protein expression. They play fundamental roles in several diseases, including prostate cancer (PCa). A single miRNA can target hundreds of mRNAs and coordinately regulate them, which implicates them in nearly every biological pathway. Hence, miRNAs modulate proliferation, cell cycle, apoptosis, adhesion, migration, invasion and metastasis, most of them constituting crucial hallmarks of cancer. Due to these properties, miRNAs emerged as promising tools for diagnostic, prognosis and management of cancer patients. Moreover, they come out as potential targets for cancer treatment, and several efforts are being made to progress in the field of miRNA-based cancer therapy. In this review, we will summarize the recent information about miRNAs in PCa. We will recapitulate all the miRNAs involved in the androgen pathway and the biology of PCa, focusing in PCa initiation and progression. In particular, we will describe the miRNAs associated with cell proliferation, cell cycle and apoptosis in PCa, as well as invasion, adhesion and metastatic miRNAs. We will revise the recent progress made understanding the role of circulating miRNAs identified in PCa that might be useful for PCa patient stratification. Another key aspect to be discussed in this review is miRNAs’ role in PCa therapy, including the miRNAs delivery.
Collapse
|