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Jiang P, Xiao Y, Hu X, Wang C, Gao H, Huang H, Lv J, Qi Z, Wang Z. RVG29 Peptide-Modified Exosomes Loaded with Mir-133b Mediate the RhoA-ROCK Pathway to Improve Motor and Neurological Symptoms in Parkinson's Disease. ACS Biomater Sci Eng 2024; 10:3069-3085. [PMID: 38578110 DOI: 10.1021/acsbiomaterials.3c01622] [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] [Indexed: 04/06/2024]
Abstract
Parkinson's disease (PD) is the second most common neurodegenerative disorder worldwide. Drug delivery to the brain through the blood-brain barrier (BBB) is a significant challenge in PD treatment. Exosomes, which can efficiently traverse the BBB, which many drugs cannot penetrate, are ideal natural carriers for drug delivery. In this study, the BBB shuttle peptide was modified on the exosome surfaces. Three types of exosomes were constructed, each modified with a distinct peptide (RVG29, TAT, or Ang2) and loaded with miR-133b. The safety and brain-targeting capabilities of these peptide-modified exosomes were then evaluated. Finally, the mechanism by which RVG29-Exo-133b regulates the RhoA-ROCK signaling pathway was investigated. The findings indicate that the three peptide-modified exosomes were adequately tolerated, safe, and effectively assimilated in vivo and ex vivo, with RVG29 exhibiting superior targeting to the brain. Furthermore, RVG29-Exo-133b decreased the phosphorylation level of the Tau protein by targeting the RhoA-ROCK signaling pathway. It also enhanced the motor function in mice with PD, thereby reducing the degree of depression, improving dopaminergic neuron function, and attenuating 6-OHDA-induced nerve damage. In this study, we developed a stable drug delivery mechanism that targets the intracerebral region using exosomes. Furthermore, a novel strategy was developed to manage PD and can potentially serve as a preclinical basis for utilizing exosomes in the diagnosis and treatment of neurodegenerative conditions.
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Affiliation(s)
- Peng Jiang
- Medical College, Guangxi University, Nanning 530021, P. R. China
- Ruikang Hospital Affiliated to Guangxi University of Chinese Medicine, Nanning530011, P. R. China
| | - Yu Xiao
- Medical College, Guangxi University, Nanning 530021, P. R. China
| | - Xinmei Hu
- Medical College, Guangxi University, Nanning 530021, P. R. China
| | - Cancan Wang
- Medical College, Guangxi University, Nanning 530021, P. R. China
| | - Hongjun Gao
- Ruikang Hospital Affiliated to Guangxi University of Chinese Medicine, Nanning530011, P. R. China
| | - Hongri Huang
- Guangxi Taimei Rensheng Biotechnology Co., Ltd., Nanning 530006, P. R. China
| | - Junming Lv
- Jinjiang Municipal Hospital (Shanghai Sixth People's Hospital Fujian Campus), Jinjiang 200233, P. R. China
| | - Zhongquan Qi
- Medical College, Guangxi University, Nanning 530021, P. R. China
| | - Zhanxiang Wang
- Department of Neurosurgery and Department of Neuroscience, Fujian Key Laboratory of Brain Tumors Diagnosis and Precision Treatment, Xiamen Key Laboratory of Brain Center, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen 361026, Fujian, P. R. China
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Bai Z, Zhou D, Tao K, Lin F, Wang H, Sun H, Liu R, Li Z. The Role of MicroRNA-206 in the Regulation of Diabetic Wound Healing via Hypoxia-Inducible Factor 1-Alpha. Biochem Genet 2024:10.1007/s10528-024-10759-9. [PMID: 38446322 DOI: 10.1007/s10528-024-10759-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Accepted: 02/25/2024] [Indexed: 03/07/2024]
Abstract
Successful wound healing in diabetic patients is hindered by dysregulated miRNA expression. This study aimed to investigate the abnormal expression of miRNAs in diabetic wound healing and the potential therapeutic role of modulating the miR-206/HIF-1α pathway. MicroRNA assays were used to identify differentially expressed miRNAs in diabetic wound sites and adjacent areas. In vitro models and a rat diabetic model were established to evaluate the effects of miR-206 on HIF-1α regulation and wound healing. The study revealed differential expression of miR-206 in diabetic wound tissues, its interaction with HIF-1α, and the inhibitory effect of miR-206 on cell growth under high glucose conditions. Modulating the miR-206/HIF-1α pathway using miR-206 antagomir promoted HIF-1α, CD34, and VEGF expression, ultimately enhancing diabetic wound healing.
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Affiliation(s)
- Zeming Bai
- Burn and Plastic Surgery Department, General Hospital of Northern Theater Command, Shenyang, 110000, China
| | - Dapeng Zhou
- Burn and Plastic Surgery Department, General Hospital of Northern Theater Command, Shenyang, 110000, China.
| | - Kai Tao
- Burn and Plastic Surgery Department, General Hospital of Northern Theater Command, Shenyang, 110000, China.
| | - Feng Lin
- Burn and Plastic Surgery Department, General Hospital of Northern Theater Command, Shenyang, 110000, China
| | - Hongyi Wang
- Burn and Plastic Surgery Department, General Hospital of Northern Theater Command, Shenyang, 110000, China
| | - Haiwei Sun
- Burn and Plastic Surgery Department, General Hospital of Northern Theater Command, Shenyang, 110000, China
| | - Ruidi Liu
- Burn and Plastic Surgery Department, General Hospital of Northern Theater Command, Shenyang, 110000, China
| | - Zhe Li
- Burn and Plastic Surgery Department, General Hospital of Northern Theater Command, Shenyang, 110000, China
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3
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Qi W, Guan W. A Comprehensive Review on the Importance of MiRNA-206 in the Animal Model and Human Diseases. Curr Neuropharmacol 2024; 22:1064-1079. [PMID: 37032500 DOI: 10.2174/1570159x21666230407124146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 02/08/2023] [Accepted: 02/15/2023] [Indexed: 04/11/2023] Open
Abstract
MicroRNA-206 (miR-206) is a microRNA that is involved in many human diseases, such as myasthenia gravis, osteoarthritis, depression, cancers, etc. Both inhibition effects and progression roles of miR-206 have been reported for the past few years. High expression of miR-206 was observed in patients with osteoarthritis, gastric cancer and epithelial ovarian cancer compared to normal people. The study also showed that miR-206 promotes cancer progression in breast cancer patients and avascular necrosis of the femoral head. Meanwhile, several studies have shown that expression levels of miR-206 were down-regulated in laryngeal carcinoma cell multiplication, as well as in hepatocellular carcinoma, non-small lung cancer and infantile hemangioma. Moreover, miR-206 was up-regulated in the mild stage of amyotrophic lateral sclerosis patients and then down-regulated in the moderate and severe stages, indicating that miR-206 has the double effects of starting and aggravating the disease. In neuropsychiatric disorders, such as depression, miR-206 also plays an important role in the progression of the disease; the level of miR-206 is most highly expressed in the brains of patients with depression. In the current review, we summarize the role of miR-206 in various diseases, and miR-206 may be developed as a new biomarker for diagnosing diseases in the near future.
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Affiliation(s)
- Wang Qi
- Department of Pharmacology, The First People's Hospital of Yancheng, Yancheng, 224000, Jiangsu, China
| | - Wei Guan
- Department of Pharmacology, Pharmacy College, Nantong University, Nantong, 226001, Jiangsu, China
- School of Medicine, Nantong University, Nantong, China
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Exosomal microRNA-133b-3p from bone marrow mesenchymal stem cells inhibits angiogenesis and oxidative stress via FBN1 repression in diabetic retinopathy. Gene Ther 2022; 29:710-719. [PMID: 35125496 DOI: 10.1038/s41434-021-00310-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 11/28/2021] [Accepted: 12/07/2021] [Indexed: 01/09/2023]
Abstract
Diabetic retinopathy (DR) is a common microvascular complication. Many studies have focused on the role of microRNAs (miRNAs) in DR but not specifically on miR-133b-3p. Thus, this study is to unmask the mechanisms of miR-133b-3p in DR. KK/Upj-Ay mice (a spontaneous diabetic nephropathy model of DM, referred to as DR mice) were used in the study, and retinal tissues were collected. Bone marrow mesenchymal stem cells (BMSCs) were isolated and identified. High glucose (HG)-treated mouse retinal microvascular endothelial cells (mRMECs) were transfected or co-cultured with BMSCs-derived exosomes. Then, cell proliferation, migration, apoptosis, angiogenesis, and oxidative stress were observed. MiR-133b-3p and FBN1 expression in tissues and cells was detected. MiR-133b-3p expression was reduced, and FBN1 expression was increased in retinal tissues of DR mice and HG-treated mRMECs. Up-regulating miR-133b-3p or down-regulating FBN1 or BMSCs-derived exosomes impaired oxidative stress, angiogenesis, proliferation, migration, and promoted apoptosis of HG-treated mRMECs. This study has elucidated that exosomal miR-133b-3p from BMSCs suppresses angiogenesis and oxidative stress in DR via FBN1 repression.
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Wu L, Gao J, Liu S, Jia Y, Li C, Duan L. CircRNA circ_0005273 contributes to the cisplatin resistance of cervical cancer cells by sponging miR-133b. J OBSTET GYNAECOL 2022; 42:3086-3093. [PMID: 35861544 DOI: 10.1080/01443615.2022.2099257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Circular RNAs (circRNAs) have been found to play important roles in drug resistance of human neoplasms. The aim of this study was to explore the effect of circ_0005273 on cisplatin (DDP) resistance of cervical cancer (CC) cells and identify its underlying mechanism. The quantitative real-time polymerase chain reaction (qRT-PCR) was performed to analyse circ_0005273 and miR-133b expressions, and cell counting kit-8 (CCK-8), Hoechst 33258 staining and caspase-3 activity analysis were performed to evaluate cell proliferation and apoptosis. Luciferase reporter, RNA binding protein immunoprecipitation (RIP) and RNA pull down assays were applied to explore the interaction between circ_0005273 and miR-133b. Our research showed that circ_0005273 and miR-133b expressions were upregulated and downregulated in DDP-resistant CC cancer tissues and cell lines, respectively. Both of circ_0005273 and miR-133b levels were correlated with FIGO stage, DDP status and overall survival rates. Knockdown of circ_0005273 enhanced the sensitivity of DDP-resistant CC cells to DDP by inhibiting cell proliferation and promoting cell apoptosis. Furthermore, circ_0005273 acts as a competing endogenous RNA to modulate miR-133b expression. Downregulation of miR-133b partly reversed the DDP sensitivity of circ_0005273 knockdown in DDP-resistant CC cells. In summary, our study elucidated the role of circ_0005273/miR-133b axis in DDP resistance of CC cells, which might be a potential therapeutic target for DDP-resistant CC patients. Impact StatementWhat is already known on this subject? The detailed regulatory mechanisms underlying DDP chemoresistance are still unclear. Recently, literatures reported that circ_0005273 exerts a regulatory role in the tumorigenesis and progression of human cancers including thyroid carcinoma, pancreatic carcinoma, colorectal carcinoma and breast carcinoma.What do the results of this study add? Circ_0005273 contributes to the DDP resistance of CC cells via sponging miR-133b.What are the implications of these findings for clinical practice and/or further research? The results help to reverse DDP chemoresistance, and the circ_0005273/miR-133b axis might be a potential therapeutic target for DDP-resistant CC patients.
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Affiliation(s)
- Lixia Wu
- Department of Obstetrics, The Fourth Hospital of Shijiazhuang, Shijiazhuang, China
| | - Jing Gao
- Department of Obstetrics, The Fourth Hospital of Shijiazhuang, Shijiazhuang, China
| | - Subin Liu
- Department of Gynecology, The Fourth Hospital of Shijiazhuang, Shijiazhuang, China
| | - Yuling Jia
- Electrocardiogram Room, The Fourth Hospital of Shijiazhuang, Shijiazhuang, China
| | - Cairan Li
- Department of Obstetrics, The Gaoyi County Hospital of Shijiazhuang, Shijiazhuang, China
| | - Lihong Duan
- Department of Obstetrics, The Fourth Hospital of Shijiazhuang, Shijiazhuang, China
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Bai H, He J. Effect of miR-206 Derived from Bone Marrow Mesenchymal Stem Cells (BMSCs) on CD8 Expression in Gastric Cancer. J BIOMATER TISS ENG 2022. [DOI: 10.1166/jbt.2022.2972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The BMSCs are one of the components of tumor micro-environment and participate in tumor evolution. Our study aimed to discuss the effect of exosome derived from BMSC on gastric cancer cells. Tumor and para-tumor tissues were isolated to measure miR-206 level by RT-PCR. Gastric cancer
cell behaviors were analyzed using MTT assay and scratch test. Gastric cancer model was established and treated TIGIT inhibitor to assess its role in the tumor growth in vivo. The miR-206 in exosome from BMSCs in cancer tissue was detected. CD8 expression excreted by DC could be induced
after miR-206 treatment possibly through regulating the signaling pathway of TIGIT/PVR. Inhibition of TIGIT decreased tumor growth, development and reversed tumor phenotype. In conclusion, miR-206 derived from BMSCs induces CD8 expression in gastric cancer through regulating the signaling
pathway of TIGIT/PVR, indicating that it might be a novel target for the treatment of gastric cancer.
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Affiliation(s)
- He Bai
- Department of Anorectal Surgery, The Affiliated Xinhua Hospital of Dalian University, Dalian, Liaoning Province, 116021, China
| | - Jian He
- Department of Gastrointestinal Surgery, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China
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Pan-cancer analysis of microRNA expression profiles highlights microRNAs enriched in normal body cells as effective suppressors of multiple tumor types: A study based on TCGA database. PLoS One 2022; 17:e0267291. [PMID: 35476804 PMCID: PMC9045663 DOI: 10.1371/journal.pone.0267291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 04/05/2022] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND MicroRNAs (miRNAs) are frequently deregulated in various types of cancer. While antisense oligonucleotides are used to block oncomiRs, delivery of tumour-suppressive miRNAs holds great potential as a potent anti-cancer strategy. Here, we aim to determine, and functionally analyse, miRNAs that are lowly expressed in various types of tumour but abundantly expressed in multiple normal tissues. METHODS The miRNA sequencing data of 14 cancer types were downloaded from the TCGA dataset. Significant differences in miRNA expression between tumor and normal samples were calculated using limma package (R programming). An adjusted p value < 0.05 was used to compare normal versus tumor miRNA expression profiles. The predicted gene targets were obtained using TargetScan, miRanda, and miRDB and then subjected to gene ontology analysis using Enrichr. Only GO terms with an adjusted p < 0.05 were considered statistically significant. All data from wet-lab experiments (cell viability assays and flow cytometry) were expressed as means ± SEM, and their differences were analyzed using GraphPad Prism software (Student's t test, p < 0.05). RESULTS By compiling all publicly available miRNA profiling data from The Cancer Genome Atlas (TCGA) Pan-Cancer Project, we reveal a small set of tumour-suppressing miRNAs (which we designate as 'normomiRs') that are highly expressed in 14 types of normal tissues but poorly expressed in corresponding tumour tissues. Interestingly, muscle-enriched miRNAs (e.g. miR-133a/b and miR-206) and miRNAs from DLK1-DIO3 locus (e.g. miR-381 and miR-411) constitute a large fraction of the normomiRs. Moreover, we define that the CCCGU motif is absent in the oncomiRs' seed sequences but present in a fraction of tumour-suppressive miRNAs. Finally, the gain of function of candidate normomiRs across several cancer cell types indicates that miR-206 and miR-381 exert the most potent inhibition on multiple cancer types in vitro. CONCLUSION Our results reveal a pan-cancer set of tumour-suppressing miRNAs and highlight the potential of miRNA-replacement therapies for targeting multiple types of tumour.
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Su MT, Kumata S, Endo S, Okada Y, Takai T. LILRB4 promotes tumor metastasis by regulating MDSCs and inhibiting miR-1 family miRNAs. Oncoimmunology 2022; 11:2060907. [PMID: 35402083 PMCID: PMC8986222 DOI: 10.1080/2162402x.2022.2060907] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Myeloid-derived suppressor cells (MDSCs) are a population of immune suppressive cells that are involved in tumor-associated immunosuppression, and dominate tumor progression and metastasis. In this study, we report that the leukocyte immunoglobulin-like receptor subfamily B member 4 (LILRB4, murine ortholog gp49B) orchestrates the polarization of MDSCs to exhibit pro-tumor phenotypes. We found that gp49B deficiency inhibited tumor metastases of cancer cells, and reduced tumor-infiltration of monocytic MDSCs (M-MDSCs) in tumor-bearing mice. Gp49B−/− MDSCs inhibited pro-tumor immune responses, such as activation of Treg cells, promotion of cancer cell migration, and stimulation of tumor angiogenesis. Treatment of wild-type tumor-bearing mice with gp49B−/− M-MDSCs reduced cancer metastasis. Furthermore, gp49B knockout affected plasma exosome composition in terms of increased miR-1 family microRNAs (miRNAs) expression, which correlates with the upregulation of gp49B−/− MDSC-derived anti-tumor miRNAs. Collectively, our findings reveal that LILRB4/gp49B promotes MDSC-mediated tumor metastasis by regulating the M2-polarization of MDSCs and suppressing the secretion of miR-1 family miRNAs, which facilitate tumor migration and invasion. Abbreviations CTLA-4: cytotoxic T-lymphocyte-associated protein-4; FBS: fetal bovine serum; G-MDSCs: granulocytic-MDSCs; GP49B: glycoprotein 49B; HE: hematoxylin-eosin; ICI: immune checkpoint inhibitor; ITIM: immunoreceptor tyrosine-based inhibition motif; LILRB4: leukocyte immunoglobulin-like receptor B4; M-CSF: macrophage colony stimulating factor; MDSC: myeloid-derived suppressor cell; M-MDSC: monocytic MDSC; MMP-9: metallopeptidase-9; mAb: monoclonal antibody; PBS: phosphate-buffered saline; PCR: polymerase chain reaction; PD-1: programmed death-1; PD-L1: programmed death ligand-1; PMN-MDSC: polymorphonuclear-MDSC; qRT-PCR: quantitative reverse transcription PCR; TAM: tumor associated macrophage; TME: tumor microenvironment; TMM: trimmed mean of M value; VEGFA: vascular endothelial growth factor A
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Affiliation(s)
- Mei-Tzu Su
- Department of Experimental Immunology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - Sakiko Kumata
- Department of Experimental Immunology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
- Department of Thoracic Surgery, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - Shota Endo
- Department of Experimental Immunology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - Yoshinori Okada
- Department of Thoracic Surgery, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - Toshiyuki Takai
- Department of Experimental Immunology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
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El-Mahdy HA, Sallam AAM, Ismail A, Elkhawaga SY, Elrebehy MA, Doghish AS. miRNAs inspirations in hepatocellular carcinoma: Detrimental and favorable aspects of key performers. Pathol Res Pract 2022; 233:153886. [PMID: 35405621 DOI: 10.1016/j.prp.2022.153886] [Citation(s) in RCA: 53] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 03/23/2022] [Accepted: 04/01/2022] [Indexed: 02/07/2023]
Abstract
Hepatocellular carcinoma (HCC) is the fourth leading cause of cancer-related deaths worldwide. HCC initiation, progression, and therapy failure are all influenced by various variables, including microRNAs (miRNAs). miRNAs are short non-coding RNA sequences that modulate target mRNA expression by deteriorating or repressing translation. miRNAs play an imperative role in HCC pathogenesis by triggering the induction of cancer stem cells (CSCs) and their proliferation, while also delaying apoptosis, sustaining the cell cycle, and inspiring angiogenesis, invasion, and metastasis. Additionally, miRNAs modulate crucial HCC-related molecular pathways such as the p53 pathway, the Wnt/β-catenin pathway, VEGFR2, and PTEN/PI3K/AKT pathway. Consequently, the goal of this review was to give an up-to-date overview of oncogenic and tumor suppressor (TS) miRNAs, as well as their potential significance in HCC pathogenesis and treatment responses, highlighting their underpinning molecular pathways in HCC initiation and progression. Similarly, the biological importance and clinical application of miRNAs in HCC are summarized.
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Affiliation(s)
- Hesham A El-Mahdy
- Biochemistry and Molecular Biology Department, Faculty of Pharmacy (Boys), Al-Azhar University, Nasr City 11231, Cairo, Egypt
| | - Al-Aliaa M Sallam
- Department of Biochemistry, Faculty of Pharmacy, Badr University in Cairo (BUC), Badr City, Cairo 11829, Egypt
| | - Ahmed Ismail
- Biochemistry and Molecular Biology Department, Faculty of Pharmacy (Boys), Al-Azhar University, Nasr City 11231, Cairo, Egypt
| | - Samy Y Elkhawaga
- Biochemistry and Molecular Biology Department, Faculty of Pharmacy (Boys), Al-Azhar University, Nasr City 11231, Cairo, Egypt
| | - Mahmoud A Elrebehy
- Department of Biochemistry, Faculty of Pharmacy, Badr University in Cairo (BUC), Badr City, Cairo 11829, Egypt
| | - Ahmed S Doghish
- Department of Biochemistry, Faculty of Pharmacy, Badr University in Cairo (BUC), Badr City, Cairo 11829, Egypt.
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HuR Promotes the Progression of Gastric Cancer through Mediating CDC5L Expression. DISEASE MARKERS 2022; 2022:5141927. [PMID: 35313568 PMCID: PMC8934217 DOI: 10.1155/2022/5141927] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 02/09/2022] [Accepted: 02/11/2022] [Indexed: 12/11/2022]
Abstract
Methods We performed qRT-PCR, cell cycle assay, cell migration, and mouse transplantation model analysis in our experiments. It has been clarified that HuR and microRNAs (miRNAs) have important interplays in the regulation of tumor progression. Results This study found microRNA-133b (miR-133b), as a HuR-sponged miRNA in GC cells. Downregulation of HuR can promote the expression of miR-133b and further affect the downstream cyclin CDC5L. The expressions of miR-133b were slightly lower in GC tissues than adjacent normal tissues. Conclusion Our studies suggest that HuR and miR-133b are involved in the development and pathological process of GC cells.
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Kokolo M, Bach-Elias M. P68 RNA Helicase (DDX5) Required for the Formation of Various Specific and Mature miRNA Active RISC Complexes. Microrna 2022; 11:36-44. [PMID: 35184719 PMCID: PMC10556402 DOI: 10.2174/2211536611666220218121640] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 11/17/2021] [Accepted: 12/28/2021] [Indexed: 11/22/2022]
Abstract
INTRODUCTION DEAD-box RNA helicases catalyze the ATP-dependent unwinding of doublestranded RNA. In addition, they are required for protein displacement and remodelling of RNA or RNA/protein complexes. P68 RNA helicase regulates the alternative splicing of the important protooncogene H-Ras, and numerous studies have shown that p68 RNA helicase is probably involved in miRNA biogenesis, mainly through Drosha and RISC/DICER complexes. OBJECTIVE This study aimed to determine how p68 RNA helicase affects the activity of selected mature miRNAs, including miR-342, miR-330, miR-138 and miR-206, miR-126, and miR-335, and let-7a, which are known to be related to cancer processes. METHODS The miRNA levels were analyzed in stable HeLa cells containing p68 RNA helicase RNAi induced by doxycycline (DOX). Relevant results were repeated using transient transfection with pSuper/ pSuper-p68 RNA helicase RNAi to avoid DOX interference. RESULTS Herein, we reported that p68 RNA helicase downregulation increases the accumulation of the mature miRNAs, such as miR-126, let-7a, miR-206, and miR-138. Interestingly, the accumulation of these mature miRNAs does not downregulate their known protein targets, thus suggesting that p68 RNA helicase is required for mature miRNA-active RISC complex activity. CONCLUSION Furthermore, we demonstrated that this requirement is conserved, as drosophila p68 RNA helicase can complete the p68 RNA helicase depleted activity in human cells. Dicer and Drosha proteins are not affected by the downregulation of p68 RNA helicase despite the fact that Dicer is also localized in the nucleus when p68 RNA helicase activity is reduced.
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Affiliation(s)
- Mariette Kokolo
- Instituto de Investigaciones Biomédicas de Barcelona-Consejo Superior de Investigaciones Científicas, Barcelona, Spain
| | - Montse Bach-Elias
- Instituto de Investigaciones Biomédicas de Barcelona-Consejo Superior de Investigaciones Científicas, Barcelona, Spain
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Zhang M, Lan X, Chen Y. MiR-133b suppresses the proliferation, migration and invasion of lung adenocarcinoma cells by targeting SKA3. Cancer Biol Ther 2021; 22:571-578. [PMID: 34711122 DOI: 10.1080/15384047.2021.1973819] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Spindle and Kinetochore Associated Complex Subunit 3 (SKA3) is crucial for anaphase mitosis. However, the relationship between SKA3 and lung adenocarcinoma (LUAD) has not been fully clarified. Differentially expressed genes were first identified by analyzing data from TCGA. It was found that miR-133b was significantly lowly expressed in LUAD, while SKA3 was remarkably highly expressed. Cell Counting Kit-8 (CCK8), wound healing assay and Transwell assay uncovered that overexpressing miR-133b could inhibit the proliferation, invasion and migration of LUAD cells. In addition, the targeting relationship between miR-133b and SKA3 was also verified by dual-luciferase analysis. Moreover, it was proved by the rescue assay that the overexpression of miR-133b significantly downregulated SKA3 in LUAD cells. All in all, these findings revealed the role of miR-133b and SKA3 in regulating the proliferation, migration, and invasion of LUAD cells. This study could yield new information about the mechanisms of LUAD.
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Affiliation(s)
- Ming Zhang
- Department of Respiratory, The First Hospital of Jiaxing (The Affiliated Hospital of Jiaxing University), Jiaxing, Zhejiang PR China
| | - Xiang Lan
- Department of Radiation Oncology, Lishui City People's Hospital, Lishui, Zhejiang PR China
| | - Yong Chen
- Department of Radiation Oncology, Lishui City People's Hospital, Lishui, Zhejiang PR China
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Liu O, Wang C, Wang S, Hu Y, Gou R, Dong H, Li S, Li X, Lin B. Keratin 80 regulated by miR-206/ETS1 promotes tumor progression via the MEK/ERK pathway in ovarian cancer. J Cancer 2021; 12:6835-6850. [PMID: 34659572 PMCID: PMC8517993 DOI: 10.7150/jca.64031] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 09/18/2021] [Indexed: 12/16/2022] Open
Abstract
Introduction: Keratin 80 (KRT80) is a type II epithelial keratin protein that plays an important role in cell differentiation and tumor progression. However, its role and mechanisms in ovarian cancer remain unclear. Methods: The effect of KRT80 on the survival and prognosis of patients with ovarian cancer was determined using immunohistochemistry. Cell lines overexpressing KRT80 and with KRT80 knockdown were established to study its effect on the malignant behavior of ovarian cancer cells. Western blotting was used to detect changes in related molecules, and in the MEK/ERK signal transduction pathway. ChIP assay was used to confirm that ETS1 regulates KRT80 at the transcriptional level. A double luciferase assay was used to confirm the target of miR-206. Results: The expression levels of KRT80 were high in ovarian cancer tissue, and were related to survival and prognosis. KRT80 expression is an independent prognostic factor in patients with ovarian cancer. KRT80 overexpression promotes the proliferation of ovarian cancer cells, the transition from G1 phase to S phase, invasion, and migration. KRT80 overexpression increased the expression of BCL2/BAX, CyclinD1, MMP2, MMP9, and N-cadherin, decreased the expression of E-cadherin, and increased the phosphorylation of MEK and ERK. ETS1 binds to the upstream promoter sequence of KRT80 and regulates KRT80 expression at the transcriptional level. ETS1 is a direct target of miR-206 in ovarian cancer cells. Conclusion: KRT80 regulated by miR-206/ETS1 promotes tumor progression via the MEK/ERK pathway in ovarian cancer, and KRT80 may have applications as a screening biomarker and potential therapeutic target for ovarian cancer.
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Affiliation(s)
- Ouxuan Liu
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Liaoning, China.,Key Laboratory of Maternal-Fetal Medicine of Liaoning Province, Key Laboratory of Obstetrics and Gynecology of Higher Education of Liaoning Province, Liaoning, China
| | - Caixia Wang
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu, China
| | - Shuang Wang
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Liaoning, China.,Key Laboratory of Maternal-Fetal Medicine of Liaoning Province, Key Laboratory of Obstetrics and Gynecology of Higher Education of Liaoning Province, Liaoning, China
| | - Yuexin Hu
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Liaoning, China.,Key Laboratory of Maternal-Fetal Medicine of Liaoning Province, Key Laboratory of Obstetrics and Gynecology of Higher Education of Liaoning Province, Liaoning, China
| | - Rui Gou
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Liaoning, China.,Key Laboratory of Maternal-Fetal Medicine of Liaoning Province, Key Laboratory of Obstetrics and Gynecology of Higher Education of Liaoning Province, Liaoning, China
| | - Hui Dong
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Liaoning, China.,Key Laboratory of Maternal-Fetal Medicine of Liaoning Province, Key Laboratory of Obstetrics and Gynecology of Higher Education of Liaoning Province, Liaoning, China
| | - Siting Li
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Liaoning, China.,Key Laboratory of Maternal-Fetal Medicine of Liaoning Province, Key Laboratory of Obstetrics and Gynecology of Higher Education of Liaoning Province, Liaoning, China
| | - Xiao Li
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Liaoning, China.,Key Laboratory of Maternal-Fetal Medicine of Liaoning Province, Key Laboratory of Obstetrics and Gynecology of Higher Education of Liaoning Province, Liaoning, China
| | - Bei Lin
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Liaoning, China.,Key Laboratory of Maternal-Fetal Medicine of Liaoning Province, Key Laboratory of Obstetrics and Gynecology of Higher Education of Liaoning Province, Liaoning, China
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14
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Luo Z, Fan Y, Liu X, Liu S, Kong X, Ding Z, Li Y, Wei L. MiR-188-3p and miR-133b Suppress Cell Proliferation in Human Hepatocellular Carcinoma via Post-Transcriptional Suppression of NDRG1. Technol Cancer Res Treat 2021; 20:15330338211033074. [PMID: 34355586 PMCID: PMC8358491 DOI: 10.1177/15330338211033074] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Background: Previous studies reported that N-myc downstream-regulated gene 1 (NDRG1) was upregulated in various cancer tissues and decreased expression of miR-188-3p and miR-133b could suppress cell proliferation, metastasis, and invasion and induce apoptosis of cancer cells. However, the molecular mechanism of NRDG1 involved in hepatocellular carcinoma (HCC) tumorigenesis is still unknown. Methods: The expressions of miR-188-3p, miR-133b, and NRDG1 in HCC tissues and cells were quantified by qRT-PCR and Western blot. MTT assay and transwell invasion assay were performed to evaluate cell growth and cell migration, respectively. Luciferase reporter assay were performed to determine whether miR-188-3p and miR-133b could directly bind to NRDG1 in HCC cells. Results: The results showed that NRDG1 was upregulated and these 2 microRNAs were downregulated in HCC tissues. NRDG1 was negatively correlated with miR-188-3p and miR-133b in HCC tissues. MiR-188-3p and miR-133b were demonstrated to directly bind to 3′UTR of NRDG1 and inhibit its expression. Upregulation of miR-188-3p and miR-133b reduced NRDG1 expression in hepatocellular carcinoma cell lines, which consequently inhibited cell growth and cell migration. Conclusions: Our finding suggested that miR-188-3p and miR-133b exert a suppressive effect on hepatocellular carcinoma proliferation, invasion, and migration through downregulation of NDRG1.
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Affiliation(s)
- Zhenzhao Luo
- Department of Medical Laboratory, The Central Hospital of Wuhan, Tongji Medical College, 12403Huazhong University of Science and Technology, Wuhan, China
| | - Yue Fan
- Department of Medical Laboratory, The Central Hospital of Wuhan, Tongji Medical College, 12403Huazhong University of Science and Technology, Wuhan, China
| | - Xianchang Liu
- Department of Medical Laboratory, The Central Hospital of Wuhan, Tongji Medical College, 12403Huazhong University of Science and Technology, Wuhan, China
| | - Shuiyi Liu
- Department of Medical Laboratory, The Central Hospital of Wuhan, Tongji Medical College, 12403Huazhong University of Science and Technology, Wuhan, China
| | - Xiaoyu Kong
- Department of General Surgery, The Central Hospital of Wuhan, Tongji Medical College, 12403Huazhong University of Science and Technology, Wuhan, China
| | - Zhonghuan Ding
- Department of Medical Laboratory, The Central Hospital of Wuhan, Tongji Medical College, 12403Huazhong University of Science and Technology, Wuhan, China
| | - Ying Li
- Physical Examination Center, 117921Renmin Hospital of Wuhan University, Wuhan, China
| | - Liqing Wei
- Department of Medical Laboratory, The Central Hospital of Wuhan, Tongji Medical College, 12403Huazhong University of Science and Technology, Wuhan, China
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15
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Jiao D, Jiang C, Zhu L, Zheng J, Liu X, Liu X, Chen J, Tang X, Chen Q. miR-1/133a and miR-206/133b clusters overcome HGF induced gefitinib resistance in non-small cell lung cancers with EGFR sensitive mutations. J Drug Target 2021; 29:1111-1117. [PMID: 33955799 DOI: 10.1080/1061186x.2021.1927054] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
It has been reported that clustered miRNAs can be transcribed coordinately and exhibit similar functions by regulating the same targets. miR-1/133a and miR-206/133b are well-characterized miRNA clusters. However, the effect of these clusters on EGFR-TKI resistance is not clear. In this study, we demonstrated that lentivirus-mediated HGF overexpression was able to induce gefitinib resistance in non-small cell lung cancers with EGFR sensitive mutations. miR-1/133a and miR-206/133b clusters could overcome HGF induced gefitinib resistance. Furthermore, the clusters were more effective than individual miRNA. Transcriptome RNA sequencing and bioinformatics analysis revealed that multiple pathways, including 'EGFR tyrosine kinase inhibitor resistance' pathway, were involved in anti-resistance mechanisms of miR-1/133a and miR-206/133b clusters. Western blotting results confirmed the inhibitory effect of miRNA clusters on MET expression and downstream pathway activation. In conclusion, miR-1/133a and miR-206/133b clusters are able to exhibit the synergetic effect on overcoming HGF-induced gefitinib resistance in NSCLC and the mechanisms are through targeting multiple genes related to gefitinib resistance.
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Affiliation(s)
- Demin Jiao
- The First Clinical Medical College, Wenzhou Medical University, Wenzhou, China.,Department of Respiratory and Critical Care Medicine, The 903rd Hospital of PLA, Hangzhou, China
| | - Chunyan Jiang
- Department of Oncology, The 903rd Hospital of PLA, Hangzhou, China
| | - Linzhi Zhu
- The First Clinical Medical College, Wenzhou Medical University, Wenzhou, China
| | - Jie Zheng
- Department of Oncology, The 903rd Hospital of PLA, Hangzhou, China
| | - Xibang Liu
- The First Clinical Medical College, Wenzhou Medical University, Wenzhou, China
| | - Xiang Liu
- Department of Respiratory and Critical Care Medicine, The 903rd Hospital of PLA, Hangzhou, China
| | - Jun Chen
- Department of Respiratory and Critical Care Medicine, The 903rd Hospital of PLA, Hangzhou, China
| | - Xiali Tang
- Department of Respiratory and Critical Care Medicine, The 903rd Hospital of PLA, Hangzhou, China
| | - Qingyong Chen
- The First Clinical Medical College, Wenzhou Medical University, Wenzhou, China.,Department of Respiratory and Critical Care Medicine, The 903rd Hospital of PLA, Hangzhou, China
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16
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Ray I, Goswami S. Circadian rhythm genes in cancer: insight into their functions and regulation involving noncoding RNAs. Chronobiol Int 2021; 38:1231-1243. [PMID: 34024245 DOI: 10.1080/07420528.2021.1928157] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The 24-h circadian rhythm handles a wide variety of physiological needs. Clock genes, in coordination with other tissue-specific factors regulate various processes and often turns responsible for the pathological conditions when altered. Cancer is one such disease where the clock genes have been shown to contribute at multiple levels modulating key hallmarks of cancer. Most importantly, adding to this complication, noncoding RNAs (ncRNAs) have emerged as one of the major post-transcriptional regulators of gene expression and many recent studies have indicated about involvement of microRNAs or long noncoding RNAs in the process. In this review, we have described how do circadian pathway genes participated in oncogenesis and also updated the latest status of ncRNA involvement. We also try to address the existing gaps to have a more comprehensive understanding of the phenomenon in future.Abbreviations: HIFs: hypoxia-inducible factors; VEGF: Vascular endothelial growth factor; Mdm2: Mouse double minute 2 homolog; ATM: Ataxia telangiectasia mutated; Chk2: Checkpoint kinase 2; Bcl-Xl: B-cell lymphoma-extra-large; Bcl-2: B-cell lymphoma 2; DGCR8: DiGeorge syndrome chromosomal region 8; PPAR-γ: Peroxisome proliferator-activated receptor gamma.
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Affiliation(s)
- Indrani Ray
- National Institute of Biomedical Genomics, Kalyani, India
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17
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Lyu J, Sun Y, Li X, Ma H. MicroRNA-206 inhibits the proliferation, migration and invasion of colorectal cancer cells by regulating the c-Met/AKT/GSK-3β pathway. Oncol Lett 2020; 21:147. [PMID: 33633805 PMCID: PMC7877959 DOI: 10.3892/ol.2020.12408] [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: 06/24/2020] [Accepted: 11/13/2020] [Indexed: 12/16/2022] Open
Abstract
An imbalance in microRNA (miRNA/miR) expression is closely associated with tumorigenesis and progression. miR-206 is downregulated in different types of tumors, including colorectal cancer (CRC). However, the effects of miR-206 on the progression of CRC, and its underlying molecular mechanisms are yet to be elucidated. The present study aimed to investigate the effects of miR-206 on the proliferation, migration and invasion of colorectal cancer cells, and determine its potential molecular mechanism. The results of the present study demonstrated that the expression levels of miR-206 and c-Met were affected in HCT116 and SW480 cells by transfected with miR-206 mimic, inhibitor or small interfering RNA-c-Met. A Dual-luciferase reporter assay was performed to identify the miRNA targets. Cell proliferation, migration and invasion assays were also performed. The results demonstrated that overexpression of miR-206 significantly decreased the viability of HCT116 and SW480 cells. The results of the Transwell assay indicated that the cell migratory and invasive abilities were inhibited following transfection with miR-206 mimic. As a target of miR-206, knockdown of c-Met significantly suppressed cell viability, migration and invasion. In addition, c-Met knockdown or overexpression of miR-206 inhibited activation of the AKT/GSK-3β pathway. Collectively, these results suggest that miR-206 suppresses the proliferation, migration and invasion of CRC cells by targeting the c-Met/AKT/GSK-3β pathway.
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Affiliation(s)
- Jiayu Lyu
- Department of First General Surgery, The Fifth Hospital of Harbin, Harbin, Heilongjiang 150040, P.R. China
| | - Yao Sun
- Department of Neurology, General Hospital of Heilongjiang Province Land Reclamation Bureau, Harbin, Heilongjiang 150088, P.R. China
| | - Xizhi Li
- Department of Neurology, Binzhou Medical University Hospital, Binzhou, Shandong 256603, P.R. China
| | - Huili Ma
- Department of Emergency Surgical Trauma Center, Binzhou Medical University Hospital, Binzhou, Shandong 256603, P.R. China
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18
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Prognostic Value and Clinicopathological Features of MicroRNA-206 in Various Cancers: A Meta-Analysis. BIOMED RESEARCH INTERNATIONAL 2020; 2020:2159704. [PMID: 33145343 PMCID: PMC7596429 DOI: 10.1155/2020/2159704] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 08/28/2020] [Accepted: 09/25/2020] [Indexed: 01/02/2023]
Abstract
It has been reported that microRNA-206(miR-206) plays an important role in cancers and could be used as a prognostic biomarker. However, the results are controversial. Therefore, we summarize all available evidence and present a meta-analysis to estimate the prognostic value of miR-206 in various cancers. The relevant studies were collected by searching PubMed, EMBASE, and Web of Science databases until August 21, 2020. Hazard ratios (HRs) and odds ratios (ORs) with 95% confidence intervals (CIs) were applied to explore the association between miR-206 and survival results and clinicopathologic features. Sources of heterogeneity were investigated by subgroup analysis and sensitivity analysis. Publication bias was evaluated using Egger's test. Twenty articles involving 2095 patients were included in the meta-analysis. The pooled HR showed that low miR-206 expression was significantly associated with unfavourable overall survival (OS) (HR = 2.03, 95 CI%: 1.53-2.70, P < 0.01). In addition, we found that low miR-206 expression predicted significantly negative association with tumor stage (III-IV VS. I-II) (OR = 4.20, 95% CI: 2.17-8.13, P < 0.01), lymph node status (yes VS. no) (OR = 3.58, 95%: 1.51-8.44, P = 0.004), distant metastasis (yes VS. no) (OR = 3.19, 95%: 1.07-9.50, P = 0.038), and invasion depth (T3 + T4 vs. T2 + T1) (OR = 2.43, 95%: 1.70-3.49, P < 0.01). miR-206 can be used as an effective prognostic indicator in various cancers. Further investigations are warranted to validate the present results.
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19
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Liu C, Li J, Wang W, Zhong X, Xu F, Lu J. miR-206 inhibits liver cancer stem cell expansion by regulating EGFR expression. Cell Cycle 2020; 19:1077-1088. [PMID: 32286127 DOI: 10.1080/15384101.2020.1739808] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Liver cancer stem cells (CSCs) are involved in tumorigenesis, progression, drug resistance and recurrence of hepatocellular carcinoma (HCC). However, the underlying mechanism for the propagation of liver cancer stem cells was unclear. Herein, we observed miR-206 expression was reduced in both chemoresistant HCCs and recurrent HCCs from patients. A dramatically decrease of miR-206 was detected in cluster of differentiation 133 (CD133) or epithelial cell adhesion molecule (EpCAM)-positive liver CSCs and in CSC-enriched hepatoma spheres. Functional studies revealed that a forced expression of miR-206 inhibited liver CSCs expansion by suppressing the dedifferentiation of hepatoma cells and attenuating the self-renewal of liver CSCs. Mechanistically, bioinformatic and luciferase reporter analysis identified epidermal growth factor receptor (EGFR) as a direct target of miR-206. Moreover, miR-206 downregulated the expression of EGFR in liver CSCs. There was a significant inverse correlation between miR-206 and EGFR mRNA expression in HCC samples. Special EGFR inhibitor Gefitinib abolished the discrepancy in liver CSC proportion and the self-renewal capacity between miR-206 overexpression hepatoma cells and control cells, which further confirmed that EGFR was required in miR-206-inhibited liver CSCs expansion. Conclusion: miR-206 could suppress HCC cell dedifferentiation and liver CSCs expansion by targeting EGFR signaling.
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Affiliation(s)
- Caifeng Liu
- Department of Hepatic Surgery, Third Affiliated Hospital of Second Military Medical University, Shanghai, China
| | - Jun Li
- Department of Hepatic Surgery, Third Affiliated Hospital of Second Military Medical University, Shanghai, China
| | - Wei Wang
- Department of Otolaryngology-Head & Neck Surgery, First Affiliated Hospital of Second Military Medical University, Shanghai, China
| | - Xingyang Zhong
- Department of Hepatic Surgery, Third Affiliated Hospital of Second Military Medical University, Shanghai, China
| | - Feng Xu
- Department of Hepatic Surgery, Third Affiliated Hospital of Second Military Medical University, Shanghai, China
| | - Junhua Lu
- Department of Hepatic Surgery, Third Affiliated Hospital of Second Military Medical University, Shanghai, China
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20
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Liang W, Wang X, Yu X, Zuo Y, Cheng K, Yang M. Dynamin-related protein-1 promotes lung cancer A549 cells apoptosis through the F-actin/bax signaling pathway. J Recept Signal Transduct Res 2020; 40:419-425. [PMID: 32249652 DOI: 10.1080/10799893.2020.1747491] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Dynamin-related protein-1 (Drp1) has been found to be associated with cell death. The role of Drp1 in A549 cells death has not been explored. In this study, adenovirus-mediated Drp1 overexpression was used to investigate the influence of Drp1 on A549 cell viability with a focus on F-actin and Bax. Cell viability, protein expression, oxygen consumption, energy metabolism, and growth rate were measured through ELISA, qPCR, western blots and pathway analysis. Our results indicated that Drp1 overexpression promoted A549 cell death through apoptosis. Mechanistically, cytoskeletal F-actin was impaired and Bax expression was elevated in response to Drp1 overexpression. Besides, energy metabolism was reduced and oxygen consumption was interrupted. Therefore, our results demonstrated that A549 cell viability, apoptosis and growth were regulated by the Drp1/F-actin/Bax signaling pathways. These data explain a new role played by Drp1 in regulating cell viability and also provide a potential target to affect the progression of lung cancer through induction of cell death.
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Affiliation(s)
- Wenjun Liang
- Department of Respiratory Medicine, Affiliated Changzhou Second Hospital of Nanjing Medical University, Changzhou, PR China
| | - Xiaohua Wang
- Department of Respiratory Medicine, Affiliated Changzhou Second Hospital of Nanjing Medical University, Changzhou, PR China
| | - Xiaowei Yu
- Department of Respiratory Medicine, Affiliated Changzhou Second Hospital of Nanjing Medical University, Changzhou, PR China
| | - Yijun Zuo
- Department of Respiratory Medicine, Affiliated Changzhou Second Hospital of Nanjing Medical University, Changzhou, PR China
| | - Kewei Cheng
- Department of Respiratory Medicine, Affiliated Changzhou Second Hospital of Nanjing Medical University, Changzhou, PR China
| | - Mingxia Yang
- Department of Respiratory Medicine, Affiliated Changzhou Second Hospital of Nanjing Medical University, Changzhou, PR China
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21
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Ceci C, Atzori MG, Lacal PM, Graziani G. Role of VEGFs/VEGFR-1 Signaling and its Inhibition in Modulating Tumor Invasion: Experimental Evidence in Different Metastatic Cancer Models. Int J Mol Sci 2020; 21:E1388. [PMID: 32085654 PMCID: PMC7073125 DOI: 10.3390/ijms21041388] [Citation(s) in RCA: 106] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 02/13/2020] [Accepted: 02/14/2020] [Indexed: 12/14/2022] Open
Abstract
The vascular endothelial growth factor (VEGF) family members, VEGF-A, placenta growth factor (PlGF), and to a lesser extent VEGF-B, play an essential role in tumor-associated angiogenesis, tissue infiltration, and metastasis formation. Although VEGF-A can activate both VEGFR-1 and VEGFR-2 membrane receptors, PlGF and VEGF-B exclusively interact with VEGFR-1. Differently from VEGFR-2, which is involved both in physiological and pathological angiogenesis, in the adult VEGFR-1 is required only for pathological angiogenesis. Besides this role in tumor endothelium, ligand-mediated stimulation of VEGFR-1 expressed in tumor cells may directly induce cell chemotaxis and extracellular matrix invasion. Furthermore, VEGFR-1 activation in myeloid progenitors and tumor-associated macrophages favors cancer immune escape through the release of immunosuppressive cytokines. These properties have prompted a number of preclinical and clinical studies to analyze VEGFR-1 involvement in the metastatic process. The aim of the present review is to highlight the contribution of VEGFs/VEGFR-1 signaling in the progression of different tumor types and to provide an overview of the therapeutic approaches targeting VEGFR-1 currently under investigation.
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Affiliation(s)
- Claudia Ceci
- Department of Systems Medicine, University of Rome Tor Vergata, Via Montpellier 1, 00133 Rome, Italy; (C.C.); (M.G.A.)
| | - Maria Grazia Atzori
- Department of Systems Medicine, University of Rome Tor Vergata, Via Montpellier 1, 00133 Rome, Italy; (C.C.); (M.G.A.)
| | - Pedro Miguel Lacal
- Laboratory of Molecular Oncology, “Istituto Dermopatico dell’Immacolata-Istituto di Ricovero e Cura a Carattere Scientifico”, IDI-IRCCS, Via dei Monti di Creta 104, 00167 Rome, Italy;
| | - Grazia Graziani
- Department of Systems Medicine, University of Rome Tor Vergata, Via Montpellier 1, 00133 Rome, Italy; (C.C.); (M.G.A.)
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22
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Wang D, Yang T, Liu J, Liu Y, Xing N, He J, Yang J, Ai Y. Propofol Inhibits the Migration and Invasion of Glioma Cells by Blocking the PI3K/AKT Pathway Through miR-206/ROCK1 Axis. Onco Targets Ther 2020; 13:361-370. [PMID: 32021281 PMCID: PMC6969687 DOI: 10.2147/ott.s232601] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Accepted: 11/19/2019] [Indexed: 12/12/2022] Open
Abstract
Background Propofol has been identified to perform anti-tumor functions in glioma. However, the molecular mechanisms underlying propofol-induced prevention on migration and invasion of glioma cells remain unclear. Methods Cell proliferation, invasion and migration were measured by 3-(4,5)-dimethylthiahiazo(−z-y1)-3,5-di-phenytetrazoliumromide assay and transwell assay, respectively. The expression of microRNA (miR)-206 and Rho-associated coiled coil-containing protein kinase 1 (ROCK1) was detected by quantitative real-time polymerase chain reaction. Western blot was used to measure the activation of the PI3K/AKT pathway. The interaction between miR-206 and ROCK1 was analyzed using the dual-luciferase reporter assay, RNA immunoprecipitation assay, and pull-down assay. Results Propofol treatment inhibited the migration, invasion, and PI3K/AKT pathway activation in glioma cells. MiR-206 was decreased in glioma tissues and cells, while propofol exposure induced the upregulation of miR-206 in glioma cells. Besides that, we also found overexpressed miR-206 enhanced propofol-mediated inhibition on the migration, invasion, and PI3K/AKT pathway activation of glioma cells. Subsequently, ROCK1 was confirmed to be a target of miR-206. ROCK1 was elevated in glioma tissues and cells, but was reduced by propofol exposure in glioma cells. The rescue assay indicated that the miR-206/ROCK1 axis was involved in propofol-induced inhibition on the migration, invasion, and PI3K/AKT pathway activation in glioma cells. Conclusion Propofol inhibited the migration and invasion of glioma cells by blocking the PI3K/AKT pathway through the miR-206/ROCK1 axis, suggesting an effective clinical implication for the anesthetic to prevent the metastasis of glioma.
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Affiliation(s)
- Dongmei Wang
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, People's Republic of China
| | - Tao Yang
- Department of Anesthesiology, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, People's Republic of China
| | - Junqi Liu
- Department of Radiotherapy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, People's Republic of China
| | - Yafei Liu
- Department of Neurosurgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, People's Republic of China
| | - Na Xing
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, People's Republic of China
| | - Juan He
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, People's Republic of China
| | - Jianjun Yang
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, People's Republic of China
| | - Yanqiu Ai
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, People's Republic of China
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23
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Dong ZQ, Guo ZY, Xie J. The lncRNA EGFR-AS1 is linked to migration, invasion and apoptosis in glioma cells by targeting miR-133b/RACK1. Biomed Pharmacother 2019; 118:109292. [PMID: 31545240 DOI: 10.1016/j.biopha.2019.109292] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Revised: 07/18/2019] [Accepted: 07/31/2019] [Indexed: 12/16/2022] Open
Abstract
Glioblastoma multiforme (GBM) is the most common in situ neoplasms in central nervous system (CNS). However, the pathogenesis of GBM is poorly understood. Long noncoding RNAs (lncRNAs) have been implicated in GBM progression. In this study, we attempted to identify the biological role of the EGFR-AS1 in glioma cells and tissues, as well as reveal the molecular mechanism associated. The results indicated that lnc-EGFR-AS1 expression was increased in glioma cells and tissues. EGFR-AS1 knockdown suppressed proliferation, migration and invasion of glioma cells, but induced apoptosis. Additionally, lnc-EGFR-AS1 functioned as a sponge for miR-133b. Promoting lnc-EGFR-AS1 expression significantly reduced miR-133b expression. Furthermore, miR-133b could target the 3'-untranslated region (3'-UTR) of RACK1 and reduced its expression levels. What's more, lnc-EGFR-AS1 knockdown reduced RACK1 expression partly through enhancing miR-133b expression. In vivo experiments confirmed the anti-tumorigenesis capability of EGFR-AS1 knockdown. These findings elucidated that EGFR-AS1 accelerated cell proliferation, migration, invasion and prevented apoptosis in glioma cells by regulating miR-133b/RACK1, providing new insights for the diagnosis and molecular therapy of GBM.
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Affiliation(s)
- Zhi-Qiang Dong
- Department of Neurosurgery, Second Hospital of Lanzhou University, Lanzhou 730030, China
| | - Zhao-Yu Guo
- Department of Neurosurgery, Yangling Demonstration Zone Hospital, Xianyang 712100, China.
| | - Jun Xie
- Department of Neurosurgery, People's Hospital of Tongchuan City, Tongchuan 727000, China
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24
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LncRNA NEAT1 Silenced miR-133b Promotes Migration and Invasion of Breast Cancer Cells. Int J Mol Sci 2019; 20:ijms20153616. [PMID: 31344855 PMCID: PMC6695844 DOI: 10.3390/ijms20153616] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 07/10/2019] [Accepted: 07/23/2019] [Indexed: 01/17/2023] Open
Abstract
Breast cancer, the most prevalent cancer type among women worldwide, remains incurable once metastatic. Long noncoding RNA (lncRNA) and microRNA (miRNA) play important roles in breast cancer by regulating specific genes or proteins. In this study, we found miR-133b was silenced in breast cancer cell lines and in breast cancer tissues, which predicted poor prognosis in breast cancer patients. We also confirmed that lncRNA NEAT1 was up-regulated in breast cancer and inhibited the expression of miR-133b, and identified the mitochondrial protein translocase of inner mitochondrial membrane 17 homolog A (TIMM17A) that serves as the target of miR-133b. Both miR-133b knockdown and TIMM17A overexpression in breast cancer cells promoted cell migration and invasion both in vitro and in vivo. In summary, our findings reveal that miR-133b plays a critical role in breast cancer cell metastasis by targeting TIMM17A. These findings may provide new insights into novel molecular therapeutic targets for breast cancer.
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25
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Long non-coding RNA 520 is a negative prognostic biomarker and exhibits pro-oncogenic function in nasopharyngeal carcinoma carcinogenesis through regulation of miR-26b-3p/USP39 axis. Gene 2019; 707:44-52. [DOI: 10.1016/j.gene.2019.02.093] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 02/14/2019] [Accepted: 02/19/2019] [Indexed: 12/14/2022]
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26
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Wang P, Gu J, Wang K, Shang J, Wang W. miR-206 inhibits thyroid cancer proliferation and invasion by targeting RAP1B. J Cell Biochem 2019; 120:18927-18936. [PMID: 31245877 DOI: 10.1002/jcb.29213] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 05/30/2019] [Indexed: 01/18/2023]
Abstract
Thyroid cancer (TC) is one of the primary tumors arisen from endocrine system. The purpose of this study was to investigate the underlying mechanism by which RAP1B (Ras-related protein Rap-1b) modulates microRNA (miR)-206 related effects on TC cells. Expression of miR-206 and RAP1B was analyzed in cells and tissues. miR-206 mimics or inhibitors and RAP1B vector were used in functional experiments to investigate the effects of miR-206 and RAP1B on cell activities including proliferation, migration, and invasion. Luciferase assay was performed to explore the association between miR-206 and RAP1B. The influence of miR-206 on tumorigenesis of TC cells was investigated using an ex vivo model. Our results demonstrated the reduce of miR-206 in TC tissues and cell lines in which RAP1B was increased. Overexpression of miR-206 significantly inhibited the functional capacities of TPC-1 cells including proliferation, invasion, and migration, most likely, through reducing the expression of RAP1B. Xenograft experiment showed that increased miR-206 could effectively inhibit the tumorigenesis of TC cells. Our study showed that miR-206 negatively regulated cell activities of proliferation, invasion, and migration in TC via suppressing RAP1B expression, suggesting that miR-206 exerts a vital role in TC.
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Affiliation(s)
- Peng Wang
- Department of Head and Neck Surgery, Institute of Cancer Research and Basic Medical Sciences of Chinese Academy of Sciences, Cancer Hospital of University of Chinese Academy of Sciences, Zhejiang Cancer Hospital, Zhejiang, China
| | - Jialei Gu
- Department of Head and Neck Surgery, Institute of Cancer Research and Basic Medical Sciences of Chinese Academy of Sciences, Cancer Hospital of University of Chinese Academy of Sciences, Zhejiang Cancer Hospital, Zhejiang, China
| | - Kejing Wang
- Department of Head and Neck Surgery, Institute of Cancer Research and Basic Medical Sciences of Chinese Academy of Sciences, Cancer Hospital of University of Chinese Academy of Sciences, Zhejiang Cancer Hospital, Zhejiang, China
| | - Jinbiao Shang
- Department of Head and Neck Surgery, Institute of Cancer Research and Basic Medical Sciences of Chinese Academy of Sciences, Cancer Hospital of University of Chinese Academy of Sciences, Zhejiang Cancer Hospital, Zhejiang, China
| | - Wendong Wang
- Department of Head and Neck Surgery, Institute of Cancer Research and Basic Medical Sciences of Chinese Academy of Sciences, Cancer Hospital of University of Chinese Academy of Sciences, Zhejiang Cancer Hospital, Zhejiang, China
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SNHG14 confers gefitinib resistance in non-small cell lung cancer by up-regulating ABCB1 via sponging miR-206-3p. Biomed Pharmacother 2019; 116:108995. [PMID: 31121484 DOI: 10.1016/j.biopha.2019.108995] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 05/07/2019] [Accepted: 05/13/2019] [Indexed: 12/15/2022] Open
Abstract
Gefitinib, an epidermal growth factor receptor tyrosine kinase inhibitor (EGFR-TKI), has been widely used as a first-line agent in EGFR-mutant non-small cell lung cancer (NSCLC). Nevertheless, the development of chemoresistance ultimately limited the curative effect of anti-cancer drugs. The present study aims to investigate the functions of SNHG14 in gefitinib resistance and gain insight into the underlying molecular mechanisms. In the present study, we found that SNHG14 expression was elevated and miR-206-3p expression was decreased in gefitinib-resistant NSCLC tumor tissues and cells. Functionally, SNHG14 overexpression increased gefitinib resistance by promoting cell viability, lowering apoptosis and enhancing colony forming ability, while SNHG14 knockdown reduced gefitinib resistance in NSCLC cells. Mechanistically, SNHG14 induced ABCB1 expression via interaction with miR-206-3p. Moreover, depletion of SNHG14 enhanced the sensitivity of NSCLC cells to gefitinib in vivo. Together, SNHG14 confers gefitinib resistance in NSCLC by regulating miR-206-3p/ABCB1 pathway, contributing to a better understanding of SNHG14 in acquired resistance and elucidating a candidate target to improve treatment response of NSCLC patients.
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Wang Y, Luo X, Liu Y, Han G, Sun D. Long noncoding RNA RMRP promotes proliferation and invasion via targeting miR‐1‐3p in non–small‐cell lung cancer. J Cell Biochem 2019; 120:15170-15181. [PMID: 31050363 DOI: 10.1002/jcb.28779] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Revised: 12/30/2018] [Accepted: 01/09/2019] [Indexed: 12/11/2022]
Affiliation(s)
- Yi Wang
- Department of Clinical Laboratory The Third Affiliated Hospital of Jinzhou Medical University Jinzhou Liaoning P.R. China
| | - Xigang Luo
- Department of Clinical Laboratory The Third Affiliated Hospital of Jinzhou Medical University Jinzhou Liaoning P.R. China
| | - Yang Liu
- Department of Clinical Laboratory The Third Affiliated Hospital of Jinzhou Medical University Jinzhou Liaoning P.R. China
| | - Guanying Han
- Department of Medical The First Affiliated Hospital of Jinzhou Medical University Jinzhou Liaoning P.R. China
| | - Dapeng Sun
- Department of Medical The First Affiliated Hospital of Jinzhou Medical University Jinzhou Liaoning P.R. China
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Distinct Angiogenic microRNA-mRNA Expression Profiles Among Subtypes of Lung Adenocarcinoma. Pathol Oncol Res 2019; 26:1089-1096. [DOI: 10.1007/s12253-019-00664-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 04/12/2019] [Indexed: 10/26/2022]
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Chen XJ, Shen XN, Chen L. Remifentanil regulates proliferation and apoptosis of gastric cancer cells by regulating miR-206/GOLPH3. Shijie Huaren Xiaohua Zazhi 2019; 27:228-237. [DOI: 10.11569/wcjd.v27.i4.228] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Remifentanil is a commonly used anesthetic in clinical practice. In recent years, its new efficacy has been continuously discovered, especially its anti-cancer function. However, the role and mechanism of remifentanil in gastric cancer (GC) are still not clear.
AIM To investigate the effect of remifentanil on the expression of miR-206, GOLPH3, cell proliferation, and apoptosis in human GC cell lines AGS and MKN-45.
METHODS The expression of miR-206 and GOLPH3 and the viability and apoptosis of AGS and MKN-45 cells after treatment with 40 nmol/L remifentanil were detected by qRT-PCR, Western blot, MTT assay, and flow cytometry, respectively. Cell viability and apoptosis of AGS and MKN-45 cells with overexpression of miR-206 or knockdown of GOLPH3 were detected by MTT assay and flow cytometry, respectively. The targeting relationship between miR-206 and GOLPH3 was verified by Targetscan online prediction, dual-luciferase assay, and Western blot. After transfection with miR-206 inhibitor or pcDNA-GOLPH3, AGS and MKN-45 cells were treated with 40 nmol/L remifentanil and then detected for cell viability and apoptosis.
RESULTS After treatment with remifentanil, the expression of miR-206 and apoptosis rate were increased while the expression of GOLPH3 and cell viability were decreased in AGS and MKN-45 cells. Cell viability was decreased and apoptotic rate was increased in AGS and MKN-45 cells after overexpression of miR-206 or knockdown of GOLPH3. The results of Targetscan online prediction, dual-luciferase assay, and Western blot indicted that miR-206 could regulate the expression of GOLPH3 protein. Down-regulation of miR-206 or overexpression of GOLPH3 could reverse the inhibition of proliferation and apoptosis of AGS and MKN-45 cells by remifentanil.
CONCLUSION Remifentanil could inhibit the proliferation and induce apoptosis of AGS and MKN-45 cells by regulating the expression of miR-206 and GOLPH3.
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Affiliation(s)
- Xiao-Jun Chen
- Department of Anesthesiology, Yiwu Central Hospital, Yiwu 322000, Zhejiang Province, China
| | - Xin-Ning Shen
- Department of Anesthesiology, Yiwu Central Hospital, Yiwu 322000, Zhejiang Province, China
| | - Liang Chen
- Department of Oncology, Yiwu Central Hospital, Yiwu 322000, Zhejiang Province, China
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LncRNA LINC00460 promotes tumor growth of human lung adenocarcinoma by targeting miR-302c-5p/FOXA1 axis. Gene 2019; 685:76-84. [DOI: 10.1016/j.gene.2018.10.058] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 10/19/2018] [Accepted: 10/20/2018] [Indexed: 12/18/2022]
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32
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Braicu C, Gulei D, Cojocneanu R, Raduly L, Jurj A, Knutsen E, Calin GA, Berindan‐Neagoe I. miR-181a/b therapy in lung cancer: reality or myth? Mol Oncol 2019; 13:9-25. [PMID: 30548184 PMCID: PMC6322195 DOI: 10.1002/1878-0261.12420] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 11/30/2018] [Accepted: 12/04/2018] [Indexed: 12/24/2022] Open
Abstract
Despite substantial progress in oncology, lung cancer remains the number one malignancy in terms of both incidence and mortality rates, and there thus remains an urgent need for new therapeutic alternatives. MicroRNA (miRNA) have an important role in cancer initiation and progression due to their capacity to interfere with transcriptional signaling and regulate key cellular processes. miR-181a and miR-181b (miR-181a/b), which are located on chromosomes 1 and 9, are pathologically expressed in the tumor tissue and plasma of patients diagnosed with lung cancer. The miR-181a/b regulatory mechanisms are sophisticated and are directly related to different target genes. In recent years, an ever-increasing number of studies have focused on the biological relevance of miR-181a/b in key cellular processes. In this paper, we aim to discuss the challenging experimental data related to miR-181a/b and their potential use for the development of new therapeutic approaches in lung cancer. We will further present the ongoing issues regarding the regulation of their multiple target genes, and their potential use as biomarkers and therapeutic targets in this deadly malignancy.
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Affiliation(s)
- Cornelia Braicu
- Research Center for Functional Genomics, Biomedicine and Translational Medicine‘Iuliu Hatieganu’ University of Medicine and PharmacyCluj‐NapocaRomania
| | - Diana Gulei
- MedFuture Research Center for Advanced Medicine‘Iuliu Hatieganu’ University of Medicine and PharmacyCluj‐NapocaRomania
| | - Roxana Cojocneanu
- Research Center for Functional Genomics, Biomedicine and Translational Medicine‘Iuliu Hatieganu’ University of Medicine and PharmacyCluj‐NapocaRomania
| | - Lajos Raduly
- Research Center for Functional Genomics, Biomedicine and Translational Medicine‘Iuliu Hatieganu’ University of Medicine and PharmacyCluj‐NapocaRomania
| | - Ancuta Jurj
- Research Center for Functional Genomics, Biomedicine and Translational Medicine‘Iuliu Hatieganu’ University of Medicine and PharmacyCluj‐NapocaRomania
| | - Erik Knutsen
- Department of Experimental TherapeuticsThe University of Texas MD Anderson Cancer CenterHoustonTXUSA
| | - George Adrian Calin
- Department of Experimental TherapeuticsThe University of Texas MD Anderson Cancer CenterHoustonTXUSA
- Center for RNA Inference and Non‐Coding RNAThe University of Texas MD Anderson Cancer CenterHoustonTXUSA
| | - Ioana Berindan‐Neagoe
- Research Center for Functional Genomics, Biomedicine and Translational Medicine‘Iuliu Hatieganu’ University of Medicine and PharmacyCluj‐NapocaRomania
- MedFuture Research Center for Advanced Medicine‘Iuliu Hatieganu’ University of Medicine and PharmacyCluj‐NapocaRomania
- Department of Functional Genomics and Experimental PathologyThe Oncology Institute ‘Prof. Dr. Ion Chiricuta’Cluj‐NapocaRomania
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Long non-coding RNA 319 facilitates nasopharyngeal carcinoma carcinogenesis through regulation of miR-1207-5p/KLF12 axis. Gene 2019; 680:51-58. [DOI: 10.1016/j.gene.2018.09.032] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 09/18/2018] [Accepted: 09/18/2018] [Indexed: 12/19/2022]
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34
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Pan J, Zhang D, Zhang J, Qin P, Wang J. LncRNA RMRP silence curbs neonatal neuroblastoma progression by regulating microRNA-206/tachykinin-1 receptor axis via inactivating extracellular signal-regulated kinases. Cancer Biol Ther 2018; 20:653-665. [PMID: 30582709 DOI: 10.1080/15384047.2018.1550568] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND Neuroblastoma is the commonest malignancy in neonates. Long non-coding RNA (lncRNA) RNA component of mitochondrial RNA processing endoribonuclease (RMRP) has been reported to be an oncogenic factor in some malignancies. However, its roles and molecular mechanisms in neuroblastoma progression are poor defined. METHODS The expression of RMRP, microRNA-206 (miR-206), and tachykinin-1 receptor (TACR1) mRNA was measured by RT-qPCR assay. Protein levels of TACR1, phosphorylated extracellular signal-regulated kinases (ERK) 1/2 (p-ERK1/2) and ERK1/2 were detected by western blot assay. Cell proliferation was assessed by CCK-8 and colony formation assays. Cell migratory and invasive capacities were determined using Transwell migration and invasion assays. The interaction between miR-206 and RMRP or TACR1 was verified by luciferase assay. The roles and molecular mechanisms of RMRP knockdown on the growth of neuroblastoma xenografts were examined in vivo. RESULTS RMRP was highly expressed in neuroblastoma tissues. RMRP knockdown inhibited proliferation, migration and invasion in neuroblastoma cells. Moreover, TACR1 was a target of miR-206 and RMRP performed as a molecular sponge of miR-206 to sequester miR-206 from TACR1 in neuroblastoma cells. TACR1 overexpression abrogated the inhibitory effect of RMRP downregulation on neuroblastoma cell progression by activating ERK1/2 pathway. Inhibition of TACR1 and ERK1/2 pathway abated RMRP-mediated pro-proliferation effect in neuroblastoma cells. RMRP knockdown hindered neuroblastoma xenograft growth by regulating miR-206/TACR1 axis via inactivating ERK1/2 pathway in vivo. CONCLUSION RMRP knockdown hindered the tumorigenesis and progression of neuroblastoma by regulating miR-206/TACR1 axis via inactivating ERK1/2 pathway, hinting a potential therapeutic target for neuroblastoma.
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Affiliation(s)
- Juntao Pan
- a Department of Pediatric Surgery , the First Affiliated Hospital of Zhengzhou University , Zhengzhou , China
| | - Da Zhang
- a Department of Pediatric Surgery , the First Affiliated Hospital of Zhengzhou University , Zhengzhou , China
| | - Jiao Zhang
- a Department of Pediatric Surgery , the First Affiliated Hospital of Zhengzhou University , Zhengzhou , China
| | - Pan Qin
- a Department of Pediatric Surgery , the First Affiliated Hospital of Zhengzhou University , Zhengzhou , China
| | - Jiaxiang Wang
- a Department of Pediatric Surgery , the First Affiliated Hospital of Zhengzhou University , Zhengzhou , China
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35
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Chen X, Zhu H, Ye W, Cui Y, Chen M. MicroRNA‑29a enhances cisplatin sensitivity in non‑small cell lung cancer through the regulation of REV3L. Mol Med Rep 2018; 19:831-840. [PMID: 30535450 PMCID: PMC6323222 DOI: 10.3892/mmr.2018.9723] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Accepted: 09/28/2018] [Indexed: 12/28/2022] Open
Abstract
Cisplatin-based chemotherapy may greatly enhance patient prognosis; however, chemotherapy resistance remains an obstacle to curing patients with non-small cell lung cancer (NSCLC). The aim of the present study was to explore the microRNAs (miRs) that could regulate cisplatin sensitivity and provide a potential treatment method for cisplatin resistance in clinical. Results from the present study revealed that miR-29a overexpression enhanced and miR-29a inhibition reduced the sensitivity of two NSCLC cell lines, A549 and H1650, to cisplatin treatment. In addition, reduced miR-29a expression levels were observed in cisplatin-resistant A549 cells (A549rCDDP), and increased expression of miR-29a augmented cisplatin-induced inhibition of proliferation and apoptosis in A549rCDDP cells. These data indicated that miR-29a expression may be involved in the development of cisplatin resistance. miR-29a was revealed to negatively regulate REV3-like DNA-directed polymerase ζ catalytic subunit (REV3L) expression in both A549 and H1650 cells; elevated expression of REV3L in A549rCDDP cells was also detected. REV3L encodes the catalytic subunit of DNA polymerase ζ and was hypothesized, based on results from the online tool TargetScan 7.1, to be a target gene of miR-29a; this was confirmed with a dual luciferase assay. Cells treated with a very low concentration of cisplatin exhibited a significant reduction in proliferation and cell cycle arrest at the G2/M phase in REV3L-knockdown as well as in miR-29a-upregulated A549 cells. Notably, reduced miR-29a expression and an increase in REV3L mRNA expression were observed in tumor tissues from patients with NSCLC. Additionally, a negative correlation between miR-29a and REV3L mRNA expression levels in tumor tissues from patients with NSCLC was observed; low expression of miR-29a and high expression of REV3L were closely associated with an advanced tumor-node-metastasis classification. The results of the present study suggested a pivotal role of miR-29a in mediating NSCLC cell sensitivity towards cisplatin through the regulation of REV3L.
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Affiliation(s)
- Xialin Chen
- Department of Oncology, The Second Affiliated Hospital of Soochow University, Gusu, Suzhou, Jiangsu 215000, P.R. China
| | - Hong Zhu
- Department of Radiation Oncology, Minhang Branch of Cancer Hospital of Fudan University, Shanghai 200240, P.R. China
| | - Wanli Ye
- Department of Oncology, The Second Affiliated Hospital of Soochow University, Gusu, Suzhou, Jiangsu 215000, P.R. China
| | - Yayun Cui
- Department of Radiation Oncology, The Affiliated Provincial Hospital of Anhui Medical University, Hefei, Anhui 230000, P.R. China
| | - Ming Chen
- Department of Radiation Oncology, Zhejiang Cancer Hospital, Gongshu, Hangzhou, Zhejiang 310000, P.R. China
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CCL19 suppresses angiogenesis through promoting miR-206 and inhibiting Met/ERK/Elk-1/HIF-1α/VEGF-A pathway in colorectal cancer. Cell Death Dis 2018; 9:974. [PMID: 30250188 PMCID: PMC6155262 DOI: 10.1038/s41419-018-1010-2] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2018] [Revised: 08/28/2018] [Accepted: 08/29/2018] [Indexed: 12/13/2022]
Abstract
The mechanisms underlying the role of chemokines in tumor angiogenesis is still not fully understood. In this study, we detected the influence of CCL19 on colorectal cancer (CRC) angiogenesis. The expression of CCL19 and CD31 in CRC tissues were detected by immunohistochemistry. Human CRC cell lines SW1116 and SW620 stably transfected with CCL19 lentivirus and CCL19 shRNA, and HUVEC stably transfected with CCR7 shRNA were used in our study. Our study showed that CCL19 was significantly low-expressed in CRC tissues and positively related to highly tumor microvessel density. In vitro, we observed that CCL19 high-expressed SW1116 supernatant was able to inhibit proliferation, migration, and sprouting responses of HUVEC, whereas CCL19 low-expressed SW620 supernatant can promote HUVEC angiogenesis. Additionally, we further demonstrated that these functions maybe achieved through promoting miR-206 thus inhibiting Met/ERK/Elk-1/HIF-1α/VEGF-A pathway in a CCR7-dependent manner. Mice angiogenesis model also confirmed that elevated expression of CCL19 inhibit the angiogenesis of CRC in vivo. In summary, our results supported that CCL19 can inhibit CRC angiogenesis through promoting miR-206 thus inhibiting Met/ERK/Elk-1/HIF-1α/VEGF-A pathway. This may be a novel therapeutic option for anti-vascular treatment in CRC.
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37
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Ke SB, Qiu H, Chen JM, Shi W, Chen YS. MicroRNA-202-5p functions as a tumor suppressor in colorectal carcinoma by directly targeting SMARCC1. Gene 2018; 676:329-335. [PMID: 30144500 DOI: 10.1016/j.gene.2018.08.064] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 08/21/2018] [Accepted: 08/21/2018] [Indexed: 02/06/2023]
Abstract
Recently, microRNAs (miRNAs) have been emerged as critical regulators for human diseases and as prognostic markers in several tumors, including colorectal carcinoma (CRC). Herein, we identified a tumor-suppressive miRNA, miR-202-5p, which may suppress CRC tumorigenesis. SWI/SNF related, matrix associated, actin dependent regulator of chromatin subfamily c member 1 (SMARCC1) is a susceptibility gene in CRC. However, the role of SMARCC1 in CRC tumorigenesis has not been elucidated. In our present study, we demonstrated that miR-202-5p was a tumor-suppressive miRNA in CRC progression. We found that expression of miR-202-5p was obviously decreased in CRC tissues. Down-regulation of miR-202-5p was associated with postoperative survival. Overexpression of miR-202-5p inhibited the growth and metastasis of CRC cells. The SMARCC1 was a direct target of miR-202-5p and promoted the growth and metastasis of CRC cells. Further study showed that SMARCC1 could reverse the inhibitory effect of miR-202-5p on growth and metastasis of CRC cells. In conclusion, our data highlight the key role of miR-202-5p in the progression of CRC. Thus, miR-202-5p may be a potential prognostic marker and of treatment relevance for CRC progression intervention.
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Affiliation(s)
- Shao-Bo Ke
- Renmin Hospital of Wuhan University, Cancer Center, Wuhan 430071, PR China
| | - Hu Qiu
- Renmin Hospital of Wuhan University, Cancer Center, Wuhan 430071, PR China
| | - Jia-Mei Chen
- Renmin Hospital of Wuhan University, Cancer Center, Wuhan 430071, PR China
| | - Wei Shi
- Renmin Hospital of Wuhan University, Cancer Center, Wuhan 430071, PR China
| | - Yong-Shun Chen
- Renmin Hospital of Wuhan University, Cancer Center, Wuhan 430071, PR China.
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38
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Hu W, Bi ZY, Chen ZL, Liu C, Li LL, Zhang F, Zhou Q, Zhu W, Song YYY, Zhan BT, Zhang Q, Bi YY, Sun CC, Li DJ. Emerging landscape of circular RNAs in lung cancer. Cancer Lett 2018; 427:18-27. [PMID: 29653267 DOI: 10.1016/j.canlet.2018.04.006] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Revised: 03/31/2018] [Accepted: 04/05/2018] [Indexed: 12/23/2022]
Abstract
Lung cancer, the leading cause of cancer deaths worldwide, is characterized with malignant cell growth. Advances in next-generation sequencing has helped us further understand RNA and identify novel circular RNAs (circRNAs) that may be useful in the early diagnosis and treatment of lung cancer. Similar to other noncoding RNAs, circRNAs present diverse biological functions in normal and disease states, including various types of cancers. This review focuses mainly on the poorly understood functions of circRNA in lung cancer. This paper also summarizes the recent advances in circRNA biogenesis, analyzes the role of circRNAs in cancers, and discusses the potential mechanisms of circRNAs in lung cancer.
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Affiliation(s)
- Wei Hu
- Department of Preventive Medicine, School of Health Sciences, Wuhan University, Wuhan, Hubei, 430071, China
| | - Zhuo-Yue Bi
- Hubei Provincial Key Laboratory for Applied Toxicology (Hubei Provincial Academy for Preventive Medicine), Wuhan, Hubei, 430079, China
| | - Zhen-Long Chen
- Wuhan Hospital for the Prevention and Treatment of Occupational Diseases, Wuhan, Hubei, 430015, China
| | - Cong Liu
- Department of Preventive Medicine, School of Health Sciences, Wuhan University, Wuhan, Hubei, 430071, China
| | - Lin-Lin Li
- Department of Preventive Medicine, School of Health Sciences, Wuhan University, Wuhan, Hubei, 430071, China
| | - Feng Zhang
- Department of Preventive Medicine, School of Health Sciences, Wuhan University, Wuhan, Hubei, 430071, China
| | - Qun Zhou
- Department of Preventive Medicine, School of Health Sciences, Wuhan University, Wuhan, Hubei, 430071, China
| | - Wei Zhu
- Department of Preventive Medicine, School of Health Sciences, Wuhan University, Wuhan, Hubei, 430071, China
| | - Yang-Yi-Yan Song
- Department of Preventive Medicine, School of Health Sciences, Wuhan University, Wuhan, Hubei, 430071, China
| | - Bo-Tao Zhan
- Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, Hubei, 441021, China
| | - Qian Zhang
- Department of Pathology, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430014, China
| | - Yong-Yi Bi
- Department of Preventive Medicine, School of Health Sciences, Wuhan University, Wuhan, Hubei, 430071, China
| | - Cheng-Cao Sun
- Department of Preventive Medicine, School of Health Sciences, Wuhan University, Wuhan, Hubei, 430071, China; Department of Molecular and Cellular Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA.
| | - De-Jia Li
- Department of Preventive Medicine, School of Health Sciences, Wuhan University, Wuhan, Hubei, 430071, China.
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Zhang ZW, Chen JJ, Xia SH, Zhao H, Yang JB, Zhang H, He B, Jiao J, Zhan BT, Sun CC. Long intergenic non-protein coding RNA 319 aggravates lung adenocarcinoma carcinogenesis by modulating miR-450b-5p/EZH2. Gene 2018; 650:60-67. [DOI: 10.1016/j.gene.2018.01.096] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 01/26/2018] [Accepted: 01/29/2018] [Indexed: 01/11/2023]
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40
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Pan YL, Han ZY, He SF, Yang W, Cheng J, Zhang Y, Chen ZW. miR‑133b‑5p contributes to hypoxic preconditioning‑mediated cardioprotection by inhibiting the activation of caspase‑8 and caspase-3 in cardiomyocytes. Mol Med Rep 2018; 17:7097-7104. [PMID: 29568969 PMCID: PMC5928670 DOI: 10.3892/mmr.2018.8784] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Accepted: 03/12/2018] [Indexed: 12/26/2022] Open
Abstract
In a previous study using a microRNA (miRNA/miR) microarray assay, we demonstrated that miR-133b-5p was upregulated in response to hypoxic preconditioning (HPC). The present study was designed to investigate the role of the miR‑133b‑5p in HPC‑induced cardioprotection and the underlying mechanisms involving caspase‑8 and caspase‑3 apoptotic signaling. Adult rats were subjected to myocardial ischemia/reperfusion (I/R) injury with or without ischemic preconditioning (IPC), and the level of miR‑133b‑5p in myocardium was measured. Neonatal rat cardiomyocytes were isolated and subjected to hypoxia/reoxygenation (H/R) injury, with or without HPC. miR‑133b‑5p antagomir was transfected into the cardiomyocytes to observe whether it could block HPC‑induced cardioprotection. Cellular injury was evaluated by detecting cell viability, lactate dehydrogenase (LDH) activity and apoptotic rate. Reverse transcription‑quantitative polymerase chain reaction was used to measure the level of miR‑133b‑5p. The activation of caspase‑8 and caspase‑3 were measured by western blot analysis to detect the cleaved fragments as well as a colorimetric assay. Following myocardial I/R injury, the expression of miR‑133b‑5p was decreased in myocardium, while this decrease was restored by IPC. HPC protected neonatal rat cardiomyocytes against H/R injury by increasing cell viability, while reducing LDH release and cell apoptosis. These protective effects were coupled with the upregulation of miR‑133b‑5p. However, the knockdown of miR‑133b‑5p in the cardiomyocytes blocked HPC‑mediated cardioprotection as reflected by the aggravation of cell injury and apoptosis. HPC upregulated miR‑133b‑5p level was markedly suppressed by the antagomir. In addition, the cleavage and activities of caspase‑8 and caspase‑3 were inhibited by HPC while reversed by knockdown of miR‑133b‑5p. Upregulation of miR‑133b‑5p contributes to HPC‑mediated cardioprotection in cardiomyocytes, and the mechanism may be associated with inhibition of caspase‑8 and caspase‑3 apoptotic signaling.
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Affiliation(s)
- Yong-Lu Pan
- Department of Anesthesiology, The Second Hospital of Anhui Medical University, Hefei, Anhui 230601, P.R. China
| | - Zheng-Yi Han
- Department of Anesthesiology, The Second Hospital of Anhui Medical University, Hefei, Anhui 230601, P.R. China
| | - Shu-Fang He
- Department of Anesthesiology, The Second Hospital of Anhui Medical University, Hefei, Anhui 230601, P.R. China
| | - Wan Yang
- Department of Anesthesiology, The Second Hospital of Anhui Medical University, Hefei, Anhui 230601, P.R. China
| | - Jie Cheng
- Department of Anesthesiology, The Second Hospital of Anhui Medical University, Hefei, Anhui 230601, P.R. China
| | - Ye Zhang
- Department of Anesthesiology, The Second Hospital of Anhui Medical University, Hefei, Anhui 230601, P.R. China
| | - Zhi-Wu Chen
- Department of Pharmacology, Anhui Medical University, Hefei, Anhui 230032, P.R. China
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Chen G, Sun W, Hua X, Zeng W, Yang L. Long non-coding RNA FOXD2-AS1 aggravates nasopharyngeal carcinoma carcinogenesis by modulating miR-363-5p/S100A1 pathway. Gene 2018; 645:76-84. [DOI: 10.1016/j.gene.2017.12.026] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 12/06/2017] [Accepted: 12/13/2017] [Indexed: 12/29/2022]
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42
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Wang Y, Tian Y. miR-206 Inhibits Cell Proliferation, Migration, and Invasion by Targeting BAG3 in Human Cervical Cancer. Oncol Res 2018; 26:923-931. [PMID: 29295729 PMCID: PMC7844835 DOI: 10.3727/096504017x15143731031009] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
miR-206 and Bcl-2-associated athanogene 3 (BAG3) have been suggested as important regulators in various cancer types. However, the biological role of miR-206 and BAG3 in cervical cancer (CC) remains unclear. We investigated the expressions and mechanisms of miR-206 and BAG3 in CC using in vitro and in vivo assays. In the present study, miR-206 expression was expressed at a lower level in CC tissues and cells than adjacent normal tissues and NEECs. By contrast, BAG3 mRNA and protein were expressed at higher levels in CC tissues and cells. Furthermore, miR-206 overexpression repressed cell proliferation, migration, and invasion in vitro, and the 3′-untranslated region (3′-UTR) of BAG3 was a direct target of miR-206. miR-206 overexpression also inhibited EGFR, Bcl-2, and MMP2/9 protein expression, but promoted Bax protein expression. Besides, BAG3 overexpression partially abrogated miR-206-inhibited cell proliferation and invasion, while BAG3 silencing enhanced miR-206-mediated inhibition. In vivo assay revealed that miR-206 repressed tumor growth in nude mice xenograft model. In conclusion, miR-206 inhibits cell proliferation, migration, and invasion by targeting BAG3 in human CC. Thus, miR-206-BAG3 can be used as a useful target for CC.
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Affiliation(s)
- Yingying Wang
- Department of Obstetrics and Gynecology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, P.R. China
| | - Yongjie Tian
- Department of Obstetrics and Gynecology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, P.R. China
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