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Sadeghian R, Shahidi S, Komaki A, Habibi P, Ahmadiasl N, Yousefi H, Daghigh F. Synergism effect of swimming exercise and genistein on the inflammation, oxidative stress, and VEGF expression in the retina of diabetic-ovariectomized rats. Life Sci 2021; 284:119931. [PMID: 34480934 DOI: 10.1016/j.lfs.2021.119931] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 08/24/2021] [Accepted: 08/25/2021] [Indexed: 12/30/2022]
Abstract
AIMS Retinal neovascularization is one of the visual disorders during the postmenopausal period or types two diabetes. Physical activities and also phytoestrogens with powerful antioxidant features have been widely considered to improve nervous system diseases. Therefore, this study investigated the effects of genistein, swimming exercise, and their co-treatment on retina angiogenesis, oxidative stress, and inflammation in diabetic-ovariectomized rats. MAIN METHODS Wistar rats were randomly divided into six groups (n = 8 per group): sham, ovariectomized group (OVX), OVX + diabetes (OVX.D), OVX.D+ genistein (1 mg/kg, eight weeks; daily SC), OVX.D + exercise (eight weeks), and OVX.D+ genistein+exercise (eight weeks). At the end of 8 weeks, the retina was removed under anesthesia. The assessed effects of treatment were by measuring MiR-146a and miR-132 expression via RT-PCR, the protein levels of ERK, MMP-2, VEGF, and NF-κB via western blotting, inflammation, and oxidative stress markers levels via the Eliza. KEY FINDINGS The results showed miR-132, miR-146b, and MMP-2, NF-κB, ERK, VEGF, TNF-α, IL-1β proteins, and MDA factor in the OVX.D group were increased, but glutathione (GSH) was decreased in comparison with the sham and OVX groups. Both exercise and genistein treatment has reversed the disorder caused by diabetes. However, the combination of exercise and genistein was more effective than each treatment alone. SIGNIFICANCE It can be concluded that the interaction of exercise and genistein on microRNAs and their target protein was affected in the inflammation, stress oxidative, and extracellular matrix metalloproteinase pathways, can leading to a decrease in impairment of retinal neovascularization of the ovariectomized diabetic rats.
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Affiliation(s)
- Reihaneh Sadeghian
- Neurophysiology Research Center, Hamadan University of Medical Sciences, Hamadan, Iran; Medical Plants Research Center, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Siamak Shahidi
- Neurophysiology Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Alireza Komaki
- Neurophysiology Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Parisa Habibi
- Neurophysiology Research Center, Hamadan University of Medical Sciences, Hamadan, Iran.
| | - Nasser Ahmadiasl
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hadi Yousefi
- Department of Basic Medical Sciences, Khoy University of Medical Sciences, Khoy, Iran
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Yan M, Han M, Yang X, Shen R, Wang H, Zhang L, Xia S, Yang P, Zhai G, Shao Q. Dual inhibition of EGFR and IL-6-STAT3 signalling by miR-146b: a potential targeted therapy for epithelial ovarian cancer. J Enzyme Inhib Med Chem 2021; 36:1905-1915. [PMID: 34369236 PMCID: PMC8354159 DOI: 10.1080/14756366.2021.1963240] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Epidermal growth factor receptor (EGFR) signalling and the interleukin-6 (IL-6)/signal transducer and activator of transcription 3 (STAT3) are aberrantly activated in ovarian cancer. However, inhibition of EGFR signalling in ovarian cancer patients resulted in a disappointing clinical benefit. In this study, we found that EGFR could activate IL-6-STAT3 pathway in ovarian cancer cells. However, we also demonstrated that EGFR knockdown could increase STAT3 phosphorylation in HO8910 and OVCAR-3 ovarian cancer cells. Interestingly, we further demonstrated that the non-coding RNA miR-146b could simultaneously block both the EGFR and IL-6-STAT3 pathways. Finally, our data demonstrated that miR-146b overexpression resulted in a greater suppression of cell migration than STAT3 pathway inhibition alone.These results suggest a complex and heterogeneous role of EGFR in ovarian cancer. Combined blockade of EGFR and IL-6-STAT3 pathways by miR-146b might be a strategy for improving the clinical benefit of targeting the EGFR pathway in ovarian cancer patients in the future.
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Affiliation(s)
- Meina Yan
- Department of Laboratory Medicine, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University, Suzhou, Jiangsu, P. R. China
| | - Mutian Han
- Center of Reproduction and Genetics, Gusu School, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Nanjing Medical University, Suzhou, Jiangsu, P. R. China
| | - Xinxin Yang
- Department of Immunology, School of Medicine, Key Laboratory of Medical Science and Laboratory Medicine, Reproductive Sciences Institute, Jiangsu University, Zhenjiang, Jiangsu, P. R. China
| | - Rong Shen
- Department of Immunology, School of Medicine, Key Laboratory of Medical Science and Laboratory Medicine, Reproductive Sciences Institute, Jiangsu University, Zhenjiang, Jiangsu, P. R. China
| | - Hui Wang
- Department of Immunology, School of Medicine, Key Laboratory of Medical Science and Laboratory Medicine, Reproductive Sciences Institute, Jiangsu University, Zhenjiang, Jiangsu, P. R. China
| | - Lubin Zhang
- Department of Immunology, School of Medicine, Key Laboratory of Medical Science and Laboratory Medicine, Reproductive Sciences Institute, Jiangsu University, Zhenjiang, Jiangsu, P. R. China
| | - Sheng Xia
- Department of Immunology, School of Medicine, Key Laboratory of Medical Science and Laboratory Medicine, Reproductive Sciences Institute, Jiangsu University, Zhenjiang, Jiangsu, P. R. China
| | - Peifang Yang
- Department of Gynecology & Obstetrics, Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu, P. R. China
| | - Guanghua Zhai
- Department of Laboratory Medicine, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University, Suzhou, Jiangsu, P. R. China
| | - Qixiang Shao
- Department of Immunology, School of Medicine, Key Laboratory of Medical Science and Laboratory Medicine, Reproductive Sciences Institute, Jiangsu University, Zhenjiang, Jiangsu, P. R. China
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Bastami M, Mahmoodzadeh H, Saadatian Z, Daraei A, Zununi Vahed S, Mansoori Y, Nariman-Saleh-Fam Z. Perturbation of miR-146b and relevant inflammatory elements in esophageal carcinoma patients supports an immune downregulatory mechanism. Pathol Res Pract 2021; 225:153560. [PMID: 34311393 DOI: 10.1016/j.prp.2021.153560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 07/10/2021] [Accepted: 07/17/2021] [Indexed: 02/07/2023]
Abstract
BACKGROUND Esophageal Cancer is known as one of the deadliest cancers worldwide with the squamous cell carcinoma (ESCC) being the predominant subtype. There is a growing body of evidence linking the dysregulated microRNA (miRNA) pathway of immune cells to the progression of several tumors. In a previous study, we investigated molecular alterations pertaining to miR-146a and some components of NF-kB signaling pathway and proposed a possible immune downregulatory mechanism in peripheral blood mononuclear cells (PBMCs) of ESCC patients. Here, we further scrutinized other components of this pathway by evaluating PBMC levels of miR-146b, TLR4, IL10, and TNFA. METHODS Gene expressions were quantified using RT-qPCR assays. To prevent the vulnerability of results to the expression instability of reference genes, nine additional transcripts were quantified, and stable reference genes for normalizing qPCR data were identified using the NormFinder and the geNorm algorithms. The efficiency-corrected normalized relative quantity values were used to compare gene expressions among study groups. RESULTS The PBMC expression of miR-146b and TNFA was downregulated in ESCC patients as compared to healthy subjects. While the level of TLR4 was not different among the study groups, the PBMC level of IL10 was upregulated in ESCC patients. Logistic regression analyses coupled with the ROC curve and cross-validation analysis suggested that PBMC expression may serve as potential candidate biomarker for discriminating ESCC patients from healthy subjects. CONCLUSION The present findings, in line with our previous report, propose a particular gene expression pattern in PBMCs of ESCC patients, providing evidence in support of an immune downregulatory mechanism.
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Affiliation(s)
- Milad Bastami
- Women's Reproductive Health Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Noncommunicable Diseases Research Center, Fasa University of Medical Sciences, Fasa, Iran
| | | | - Zahra Saadatian
- Department of Physiology, Faculty of Medicine, Gonabad University of Medical Sciences, Gonabad, Iran
| | - Abdolreza Daraei
- Department of Medical Genetics, School of Medicine, Babol University of Medical Sciences, Babol, Iran
| | | | - Yaser Mansoori
- Noncommunicable Diseases Research Center, Fasa University of Medical Sciences, Fasa, Iran.
| | - Ziba Nariman-Saleh-Fam
- Women's Reproductive Health Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Liver and Gastrointestinal Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
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Cui J, Wang J, Lv Y, Xu D. LncRNA NEAT1 Regulates Infantile Pneumonia by Sponging miR-146b. Mol Biotechnol 2021; 63:694-701. [PMID: 33978942 DOI: 10.1007/s12033-021-00331-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Accepted: 04/23/2021] [Indexed: 01/06/2023]
Abstract
This study designed to investigate the potential role of lncRNA NEAT1/miR-146b in infantile pneumonia. In this study, 58 children with pneumonia and 58 healthy children collected for routine examination from December 2016 to January 2019. The lncRNA NEAT1 and miR-146b expression levels were detected by qPCR in both groups. The pneumonia model was established by inducing human embryonic lung fibroblasts HFL1 with LPS, and then transfected with lncRNA NEAT1 inhibition and miR-146b over-expression vector to observe the effect on cell viability and apoptosis after induction. Starbase predicted the binding site between lncRNA NEAT1 and miR-146b, and the targeted relationship between them was detected by dual luciferase reporter gene. The relative expression of lncRNA NEAT1 in serum of infantile pneumonia was up-regulated. Knocking down lncRNA NEAT1 promotes cell growth and reduces apoptosis in LPS-induced HFL1 cells. Results showed that the fluorescence activity of lncRNA NEAT1 obviously reduced when combined with miR-146b. In conclusion, the relative expression of miR-146b in serum of infantile pneumonia decreased, and over-expressing it could promote LPS-induced cell viability and reduce apoptosis. Taken together, this study demonstrated that the lncRNA NEAT1 regulates infantile pneumonia by sponging miR-146b.
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Zhang S, Jin T, Wang L, Liu W, Zhang Y, Zheng Y, Lin Y, Yang M, He X, Lin H, Chen L, Tao J. Electro-Acupuncture Promotes the Differentiation of Endogenous Neural Stem Cells via Exosomal microRNA 146b After Ischemic Stroke. Front Cell Neurosci 2020; 14:223. [PMID: 32792909 PMCID: PMC7385414 DOI: 10.3389/fncel.2020.00223] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Accepted: 06/24/2020] [Indexed: 12/20/2022] Open
Abstract
Background: Evidences indicate that exosomes-mediated delivery of microRNAs (miRNAs or miRs) is involved in the neurogenesis of stroke. This study was to investigate the role of exosomal miRNAs in non-drug therapy of electro-acupuncture (EA) regulating endogenous neural stem cells for stroke recovery. Methods: The model of focal cerebral ischemia and reperfusion in rats were established by middle cerebral artery occlusion (MCAO) and treated by EA. The exosomes were extracted from peri-ischemic striatum and identified by exosomal biomarkers, and detected differentially expressed miRNAs with microarray chip. Primary stem cells were cultured, and oxygen–glucose deprivation and reperfusion (OGD/R) was used to mimic vitro ischemic injury. Results: The levels of exosomal biomarkers TSG101 and CD81 were increased in peri-ischemic striatum after EA treatment, and we revealed 25 differentially expressed miRNAs in isolated exosomes, of which miR-146b was selected for further analysis, and demonstrated that EA increased miR-146b expression and its inhibitors could block the effects. Subsequently, we confirmed that EA upregulated miR-146b expression to promote neural stem cells differentiation into neurons in peri-ischemic striatum. In vitro, it was verified that OGD/R hindered neural stem cells differentiation, and miR-146b inhibitors furtherly suppressed its differentiation, simultaneously NeuroD1 was involved in neural stem cells differentiation into neurons. Moreover, in vivo we found EA promoted NeuroD1-mediated neural stem cells differentiation via miR-146b. In addition, EA also could improve neurological deficits through miR-146b after ischemic stroke. Conclusion: EA promotes the differentiation of endogenous neural stem cells via exosomal miR-146b to improve neurological injury after ischemic stroke.
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Affiliation(s)
- Shenghang Zhang
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, China.,The 900 Hospital of the Joint Logistic Team, Fuzhou, China
| | - Tingting Jin
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Lulu Wang
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Weilin Liu
- Fujian University of Traditional Chinese Medicine, The Academy of Rehabilitation Industry, Fuzhou, China
| | - Yuhao Zhang
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Yi Zheng
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Yunjiao Lin
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Minguang Yang
- Fujian University of Traditional Chinese Medicine, The Academy of Rehabilitation Industry, Fuzhou, China
| | - Xiaojun He
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Huawei Lin
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Lidian Chen
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Jing Tao
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, China
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Li C, Zeng X, Liu Z, Li F, Wang K, Wu B. BDNF VAL66MET Polymorphism Elevates the Risk of Bladder Cancer via MiRNA-146b in Micro-Vehicles. Cell Physiol Biochem 2018; 45:366-377. [PMID: 29402794 DOI: 10.1159/000486908] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Accepted: 10/09/2017] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND/AIMS Emerging studies on brain-derived neurotrophic factor (BDNF) have shown that might be novel biomarkers and therapeutic targets for cancer. We explore the role of BDNF in the tumorigenesis of bladder cancer and the underlying molecular mechanism. METHODS 368 patients with diagnosed bladder cancer and 352 healthy controls were enrolled to evaluate the association of BDNF and the miR-146b. Bioinformatics algorithm analysis and luciferase assay were performed to identify the target genes of miR-146b. Real-time PCR and western-blot were carried out to validate the relationship between miR-146b and CRK. MTT assay and FACS were used to evaluated the proliferation and apoptosis of cancer cells. MVs were isolated and transfect into the culture cells to confirm the above observation. RESULTS The clinical study shows that BDNF Met/Met was significantly associated with the risk of bladder cancer. In addition, comparing with Val/Val and Val/Met, Met/Met has lower miR-146b level. Luciferase assay shows that BDNF Val/Val is apparently enhanced miR-146b promoter-luciferase, but not BDNF Met/Met. Based on luciferase assay, CRK is a direct target gene of miR-146b. MiR-146b mimics significantly inhibited the expression of CRK and activation of AKT level. The expression of CRK and the activation of AKT (p-AKT) were significantly inhibited by MV-BDNF Val/Val-miR-146b or MV-BDNF Val/Met-miR-146b, but not MV-BDNF Met/Met-miR-146b. MV-BDNF Val/Val-miR-146b or Val/Met-miR-146b obviously inhibited cell proliferation, which eliminated by CRK. Meanwhile, with MV-BDNF Met/Met-miR-146b or Met/Met-miR-146b+CRK did not affect the proliferation. MV-BDNF Val/Val-miR-146b or Val/Met-miR-146b enhanced cell apoptosis, which could be eliminated by CRK. Meanwhile, MV-BDNF Met/Met-miR-146b or Met/Met-miR-146b+CRK did not promote apoptosis. CONCLUSION BDNF VAL66MET polymorphism is associated with miR-146b and its target gene CRK. MiR-146b and CRK mediated BDNF VAL66MET polymorphism associated proliferation and apoptosis via activation of AKT. Thus, BDNF Val66Met is associated with the risk of bladder cancer, and the BDNF variant could be used a biomarker for the diagnosis of bladder cancer.
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Tao X, Liu S, Men X, Xu Z. Over-expression of miR-146b and its regulatory role in intestinal epithelial cell viability, proliferation, and apoptosis in piglets. Biol Direct 2017; 12:27. [PMID: 29178964 PMCID: PMC5702241 DOI: 10.1186/s13062-017-0199-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Accepted: 11/13/2017] [Indexed: 12/23/2022] Open
Abstract
Background Weaning stress affects the small intestine of piglets. MiR-146b is differentially expressed in suckling and weaned piglets. In this study, we evaluated the effects of miR-146b on cell viability, proliferation, and apoptosis in IPEC-J2 cells. Results Transfection with miR-146b mimics successfully increased miR-146b levels by 1000× (P < 0.001). The over-expression of miR-146b significantly promoted the apoptosis (P < 0.01) of IPEC-J2 cells, with no significant effects on cell viability or proliferation. MiR-146b suppressed the luciferase activity of the miR-TLR4-wt by 57% compared with the negative control, while mutation of the miR-146b binding site significantly blocked the suppressive effect (P < 0.05). Western blot results showed that TLR4 levels decreased in IPEC-J2 cells transfected with miR-146b mimics (P < 0.05). Conclusions The over-expression of miR-146b promotes IPEC-J2 cell apoptosis. TLR4 is a direct target of miR-146b in IPEC-J2 cells. Reviewers This article was reviewed by Eugene Berezikov and Jan B Hoek.
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Affiliation(s)
- Xin Tao
- Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang, 310021, People's Republic of China
| | - Shujie Liu
- Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang, 310021, People's Republic of China
| | - Xiaoming Men
- Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang, 310021, People's Republic of China
| | - Ziwei Xu
- Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang, 310021, People's Republic of China.
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Bhairavabhotla R, Kim YC, Glass DD, Escobar TM, Patel MC, Zahr R, Nguyen CK, Kilaru GK, Muljo SA, Shevach EM. Transcriptome profiling of human FoxP3+ regulatory T cells. Hum Immunol 2016; 77:201-13. [PMID: 26686412 DOI: 10.1016/j.humimm.2015.12.004] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 11/20/2015] [Accepted: 12/02/2015] [Indexed: 12/22/2022]
Abstract
The major goal of this study was to perform an in depth characterization of the "gene signature" of human FoxP3(+) T regulatory cells (Tregs). Highly purified Tregs and T conventional cells (Tconvs) from multiple healthy donors (HD), either freshly explanted or activated in vitro, were analyzed via RNA sequencing (RNA-seq) and gene expression changes validated using the nCounter system. Additionally, we analyzed microRNA (miRNA) expression using TaqMan low-density arrays. Our results confirm previous studies demonstrating selective gene expression of FoxP3, IKZF2, and CTLA4 in Tregs. Notably, a number of yet uncharacterized genes (RTKN2, LAYN, UTS2, CSF2RB, TRIB1, F5, CECAM4, CD70, ENC1 and NKG7) were identified and validated as being differentially expressed in human Tregs. We further characterize the functional roles of RTKN2 and LAYN by analyzing their roles in vitro human Treg suppression assays by knocking them down in Tregs and overexpressing them in Tconvs. In order to facilitate a better understanding of the human Treg gene expression signature, we have generated from our results a hypothetical interactome of genes and miRNAs in Tregs and Tconvs.
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Chen L, Dai YM, Ji CB, Yang L, Shi CM, Xu GF, Pang LX, Huang FY, Zhang CM, Guo XR. MiR-146b is a regulator of human visceral preadipocyte proliferation and differentiation and its expression is altered in human obesity. Mol Cell Endocrinol 2014; 393:65-74. [PMID: 24931160 DOI: 10.1016/j.mce.2014.05.022] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2014] [Revised: 05/04/2014] [Accepted: 05/27/2014] [Indexed: 10/25/2022]
Abstract
Visceral obesity is an independent risk factor for metabolic syndrome, and abnormal fat accumulation is linked to increases in the number and size of adipocytes. MiR-146b was a miRNA highly expressed in mature adipocytes while very lowly expressed in human mesenchymal stem cells (hMSCs) and human visceral preadipocytes (vHPA). In this paper, we mainly focused on the roles of miR-146b in adipogenesis. We found miR-146b could inhibit the proliferation of visceral preadipocytes and promote their differentiation. MiR-146b in human visceral adipocytes inhibited the expression of KLF7, a member of the Kruppel-like transcription factors, as demonstrated by a firefly luciferase reporter assay, indicating that KLF7 is a direct target of the endogenous miR-146b. MiR-146b expression was significantly altered in visceral and subcutaneous adipose tissues in human overweight and obese subjects, and in the epididymal fat tissues and brown fat tissues of diet-induced obese mice. Our data indicates that miR-146b may be a new therapeutic target against human visceral obesity and metabolic dysfunction.
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Affiliation(s)
- Ling Chen
- Nanjing Maternal and Child Health Hospital of Nanjing Medical University, Nanjing 210004, China; Institute of Pediatrics, Nanjing Medical University, Nanjing 210029, China
| | - Yong-Mei Dai
- Nanjing Maternal and Child Health Hospital of Nanjing Medical University, Nanjing 210004, China
| | - Chen-Bo Ji
- Nanjing Maternal and Child Health Hospital of Nanjing Medical University, Nanjing 210004, China; Institute of Pediatrics, Nanjing Medical University, Nanjing 210029, China
| | - Lei Yang
- Nanjing Maternal and Child Health Hospital of Nanjing Medical University, Nanjing 210004, China; Institute of Pediatrics, Nanjing Medical University, Nanjing 210029, China
| | - Chun-Mei Shi
- Nanjing Maternal and Child Health Hospital of Nanjing Medical University, Nanjing 210004, China; Institute of Pediatrics, Nanjing Medical University, Nanjing 210029, China
| | - Guang-Feng Xu
- Nanjing Maternal and Child Health Hospital of Nanjing Medical University, Nanjing 210004, China; Institute of Pediatrics, Nanjing Medical University, Nanjing 210029, China
| | - Ling-Xia Pang
- Nanjing Maternal and Child Health Hospital of Nanjing Medical University, Nanjing 210004, China; Institute of Pediatrics, Nanjing Medical University, Nanjing 210029, China
| | - Fang-Yan Huang
- Nanjing Maternal and Child Health Hospital of Nanjing Medical University, Nanjing 210004, China; Institute of Pediatrics, Nanjing Medical University, Nanjing 210029, China
| | - Chun-Mei Zhang
- Nanjing Maternal and Child Health Hospital of Nanjing Medical University, Nanjing 210004, China.
| | - Xi-Rong Guo
- Nanjing Maternal and Child Health Hospital of Nanjing Medical University, Nanjing 210004, China; Institute of Pediatrics, Nanjing Medical University, Nanjing 210029, China.
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