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Kan JY, Shih SL, Yang SF, Chu PY, Chen FM, Li CL, Wu YC, Yeh YT, Hou MF, Chiang CP. Exosomal microRNA-92b Is a Diagnostic Biomarker in Breast Cancer and Targets Survival-Related MTSS1L to Promote Tumorigenesis. Int J Mol Sci 2024; 25:1295. [PMID: 38279296 PMCID: PMC10816035 DOI: 10.3390/ijms25021295] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/15/2024] [Accepted: 01/17/2024] [Indexed: 01/28/2024] Open
Abstract
Exosomal microRNAs (miRNAs) are novel, non-invasive biomarkers for facilitating communication and diagnosing cancer. However, only a few studies have investigated their function and role in the clinical diagnosis of breast cancer. To address this gap, we established a stable cell line, MDA-MB-231-CD63-RFP, and recruited 112 female participants for serum collection. We screened 88 exosomal miRNAs identified through microarray analysis of 231-CD63 and literature screening using real-time PCR; only exosomal miR-92b-5p was significantly increased in patients with breast cancer. It had a significant correlation with stage and discriminated patients from the control with an AUC of 0.787. Exosomal miR-92b-5p impacted the migration, adhesion, and spreading ability of normal human mammary epithelial recipient cells through the downregulation of the actin dynamics regulator MTSS1L. In clinical breast cancer tissue, the expression of MTSS1L was significantly inversely correlated with tissue miR-92b-5p, and high expression of MTSS1L was associated with better 10-year overall survival rates in patients undergoing hormone therapy. In summary, our studies demonstrated that exosomal miR-92b-5p might function as a non-invasive body fluid biomarker for breast cancer detection and provide a novel therapeutic strategy in the axis of miR-92b-5p to MTSS1L for controlling metastasis and improving patient survival.
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Affiliation(s)
- Jung-Yu Kan
- Division of Breast Oncology and Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 80756, Taiwan; (J.-Y.K.); (S.-L.S.); (F.-M.C.); (C.-L.L.); (Y.-C.W.)
| | - Shen-Liang Shih
- Division of Breast Oncology and Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 80756, Taiwan; (J.-Y.K.); (S.-L.S.); (F.-M.C.); (C.-L.L.); (Y.-C.W.)
| | - Sheau-Fang Yang
- Department of Pathology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 80756, Taiwan
| | - Pei-Yi Chu
- Department of Pathology, Show Chwan Memorial Hospital, Changhua 50544, Taiwan;
| | - Fang-Ming Chen
- Division of Breast Oncology and Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 80756, Taiwan; (J.-Y.K.); (S.-L.S.); (F.-M.C.); (C.-L.L.); (Y.-C.W.)
| | - Chung-Liang Li
- Division of Breast Oncology and Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 80756, Taiwan; (J.-Y.K.); (S.-L.S.); (F.-M.C.); (C.-L.L.); (Y.-C.W.)
| | - Yi-Chia Wu
- Division of Breast Oncology and Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 80756, Taiwan; (J.-Y.K.); (S.-L.S.); (F.-M.C.); (C.-L.L.); (Y.-C.W.)
- Division of Plastic Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 80756, Taiwan
| | - Yao-Tsung Yeh
- Department of Medical Laboratory Sciences and Biotechnology, Fooyin University, Kaohsiung 83130, Taiwan;
| | - Ming-Feng Hou
- Division of Breast Oncology and Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 80756, Taiwan; (J.-Y.K.); (S.-L.S.); (F.-M.C.); (C.-L.L.); (Y.-C.W.)
- Department of Biomedical Science and Environmental Biology, College of Life Science, Kaohsiung Medical University, Kaohsiung 80756, Taiwan
| | - Chih-Po Chiang
- Division of Breast Oncology and Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 80756, Taiwan; (J.-Y.K.); (S.-L.S.); (F.-M.C.); (C.-L.L.); (Y.-C.W.)
- Department of Medical Laboratory Sciences and Biotechnology, Fooyin University, Kaohsiung 83130, Taiwan;
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Zheng Z, Guo Y, Zheng Y, Wu H. miR-92b ameliorates lipoteichoic acid induced endometritis by suppressing Wnt/β-catenin pathway activation. Theriogenology 2024; 214:307-313. [PMID: 37956579 DOI: 10.1016/j.theriogenology.2023.11.003] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 10/31/2023] [Accepted: 11/02/2023] [Indexed: 11/15/2023]
Abstract
Endometritis is one of the important reasons for the low fecundity of dairy cows, which has brought huge economic losses to the dairy industry. Emerging evidence suggests that miR-92b is a novel therapeutic molecule that plays a crucial role in many inflammatory diseases. However, its mechanism in lipoteichoic acid (LTA) induced endometritis remains unclear. In the present study, we explored the mechanism of miR-92b on LTA-induced endometritis in vivo and in vitro. The result displayed that the expression of miR-92b was reduced in LTA induced mouse endometritis and bovine endometrial epithelial cell lines (BEND). Overexpression miR-92b significantly alleviated mouse uterine injury and reduced the protein levels of TNF-α, IL-1β and the MPO activity. The reporter assay of luciferase showed that miR-92b directly targeted the transmembrane receptor Frizzled-10 (FZD10), a transmembrane-type Wnt receptor. Molecular experiments were further performed to explore the mechanism of miR-92b in protecting LTA induced endometritis. The results of in vitro suggested that miR-92b mimic decreased the protein levels of Wnt3a and β-catenin in LTA stimulated BEND, which were abolished by overexpression of FZD10. As expected, miR-92b mimic decreased the expression levels of TNF-α and IL-1β, while overexpression of FZD10 promoted the production of these pro-inflammatory cytokines. Collectively, the above findings indicated that miR-92b might be an effective strategy for treatment of LTA induced endometritis.
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Affiliation(s)
- Zhijie Zheng
- Department of Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, 310058, Zhejiang, PR China
| | - Yingfang Guo
- School of Physical Education and International Equestrianism, Wuhan Business University, Wuhan, PR China
| | - Yonghui Zheng
- Department of Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, 310058, Zhejiang, PR China
| | - Haichong Wu
- Department of Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, 310058, Zhejiang, PR China.
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Yang S, Yang G, Wang X, Li L, Li Y, Xiang J, Kang L, Liang Z. MicroRNA-92b in the skeletal muscle regulates exercise capacity via modulation of glucose metabolism. J Cachexia Sarcopenia Muscle 2023; 14:2925-2938. [PMID: 37985354 PMCID: PMC10751421 DOI: 10.1002/jcsm.13377] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2023] [Revised: 09/19/2023] [Accepted: 09/25/2023] [Indexed: 11/22/2023] Open
Abstract
BACKGROUND Exercise mimetics is a proposed class of therapeutics that specifically mimics or enhances the therapeutic effects of exercise. Muscle glycogen and lactate extrusion are critical for physical performance. The mechanism by which glycogen and lactate metabolism are manipulated during exercise remains unclear. This study aimed to assess the effect of miR-92b on the upregulation of exercise training-induced physical performance. METHODS Adeno-associated virus (AAV)-mediated skeletal muscle miR-92b overexpression in C57BLKS/J mice, and global knockout of miR-92b mice were used to explore the function of miR-92b in glycogen and lactate metabolism in skeletal muscle. AAV-mediated UGP2 or MCT4 knockdown in WT or miR-92 knockout mice was used to confirm whether miR-92b regulates glycogen and lactate metabolism in skeletal muscle through UGP2 and MCT4. Body weight, muscle weight, grip strength, running time and distance to exhaustion, and muscle histology were assessed. The expression levels of muscle mass-related and function-related proteins were analysed by immunoblotting or immunostaining. RESULTS Global knockout of miR-92b resulted in normal body weight and insulin sensitivity, but higher glycogen content before exercise exhaustion (0.8538 ± 0.0417 vs. 1.043 ± 0.040, **P = 0.0087), lower lactate levels after exercise exhaustion (4.133 ± 0.2589 vs. 3.207 ± 0.2511, *P = 0.0279), and better exercise capacity (running distance to exhaustion, 3616 ± 86.71 vs. 4231 ± 90.29, ***P = 0.0006; running time to exhaustion, 186.8 ± 8.027 vs. 220.8 ± 3.156, **P = 0.0028), as compared with those observed in the control mice. Mice skeletal muscle overexpressing miR-92b (both miR-92b-3p and miR-92b-5p) displayed lower glycogen content before exercise exhaustion (0.6318 ± 0.0231 vs. 0.535 ± 0.0194, **P = 0.0094), and higher lactate accumulation after exercise exhaustion (4.5 ± 0.2394 vs. 5.467 ± 0.1892, *P = 0.01), and poorer exercise capacity (running distance to exhaustion, 4005 ± 81.65 vs. 3228 ± 149.8, ***P<0.0001; running time to exhaustion, 225.5 ± 7.689 vs. 163 ± 6.476, **P = 0.001). Mechanistic analysis revealed that miR-92b-3p targets UDP-glucose pyrophosphorylase 2 (UGP2) expression to inhibit glycogen synthesis, while miR-92b-5p represses lactate extrusion by directly target monocarboxylate transporter 4 (MCT4). Knockdown of UGP2 and MCT4 reversed the effects observed in the absence of miR-92b in vivo. CONCLUSIONS This study revealed regulatory pathways, including miR-92b-3p/UGP2/glycogen synthesis and miR-92b-5p/MCT4/lactate extrusion, which could be targeted to control exercise capacity.
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Affiliation(s)
- Shu Yang
- Department of Geriatrics, Shenzhen People's Hospital (The Second Clinical Medical CollegeJinan UniversityGuangzhouChina
- The First Affiliated HospitalSouthern University of Science and TechnologyShenzhenChina
- Guangdong Provincial Clinical Research Center for Geriatrics, Shenzhen Clinical Research Centre for GeriatricsShenzhen People's HospitalShenzhenChina
| | - Guangyan Yang
- Department of Geriatrics, Shenzhen People's Hospital (The Second Clinical Medical CollegeJinan UniversityGuangzhouChina
- Guangdong Provincial Clinical Research Center for Geriatrics, Shenzhen Clinical Research Centre for GeriatricsShenzhen People's HospitalShenzhenChina
| | - Xinyu Wang
- Department of Geriatrics, Shenzhen People's Hospital (The Second Clinical Medical CollegeJinan UniversityGuangzhouChina
- Guangdong Provincial Clinical Research Center for Geriatrics, Shenzhen Clinical Research Centre for GeriatricsShenzhen People's HospitalShenzhenChina
| | - Lixing Li
- Department of Geriatrics, Shenzhen People's Hospital (The Second Clinical Medical CollegeJinan UniversityGuangzhouChina
- Guangdong Provincial Clinical Research Center for Geriatrics, Shenzhen Clinical Research Centre for GeriatricsShenzhen People's HospitalShenzhenChina
| | - Yanchun Li
- Department of Geriatrics, Shenzhen People's Hospital (The Second Clinical Medical CollegeJinan UniversityGuangzhouChina
- Guangdong Provincial Clinical Research Center for Geriatrics, Shenzhen Clinical Research Centre for GeriatricsShenzhen People's HospitalShenzhenChina
| | - Jiaqing Xiang
- Department of Geriatrics, Shenzhen People's Hospital (The Second Clinical Medical CollegeJinan UniversityGuangzhouChina
- Guangdong Provincial Clinical Research Center for Geriatrics, Shenzhen Clinical Research Centre for GeriatricsShenzhen People's HospitalShenzhenChina
| | - Lin Kang
- Department of Geriatrics, Shenzhen People's Hospital (The Second Clinical Medical CollegeJinan UniversityGuangzhouChina
- Guangdong Provincial Clinical Research Center for Geriatrics, Shenzhen Clinical Research Centre for GeriatricsShenzhen People's HospitalShenzhenChina
- The Biobank of National Innovation Center for Advanced Medical DevicesShenzhen People's HospitalShenzhenChina
| | - Zhen Liang
- Department of Geriatrics, Shenzhen People's Hospital (The Second Clinical Medical CollegeJinan UniversityGuangzhouChina
- Guangdong Provincial Clinical Research Center for Geriatrics, Shenzhen Clinical Research Centre for GeriatricsShenzhen People's HospitalShenzhenChina
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Luo B, Wang C, Wang Z, Chen C, Peng X, Xu Q. Evaluation of serum miR-216a, miR-216b, miR217, miR-92b, miR-375 and miR-148a as potential biomarkers for acute pancreatitis and the role of miR-92b in attenuating caerulein-induced injury and inflammatory responses in AR42J cells. Comb Chem High Throughput Screen 2023:CCHTS-EPUB-129244. [PMID: 36733244 DOI: 10.2174/1386207326666230202141348] [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] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 01/13/2023] [Accepted: 01/20/2023] [Indexed: 02/04/2023]
Abstract
BACKGROUND Acute pancreatitis can eventually lead to morbidity and mortality. The present study aimed to identify the differentially expressed microRNAs (miRNAs) that are related to acute pancreatitis and explore the in vitro functional role of miR-92b in acute pancreatitis. METHODS Bioinformatics analysis was used to identify differentially expressed miRNAs in caerulein-induced acute pancreatitis samples when compared to normal controls. The role of miR-92b in acute pancreatitis was examined by in vitro functional assays. RESULTS MiRNA-network analysis revealed 12 miRNAs that function as "core regulatory miRNAs". Further validation studies revealed that six miRNAs (miR-216a, miR-216b, miR-217, miR92b, miR-375 and miR-148a) were differentially expressed in the serum samples from patients with acute pancreatitis. These six miRNAs have fair diagnostic potential for severe acute pancreatitis. Caerulein induced cell injury and inflammatory response and repressed miR-92b expression in AR42J cells. MiR-92b overexpression attenuated caerulein-induced cell injury and inflammatory responses in AR42J cells. Luciferase reporter assay showed that mitogen-activated protein kinase 4 (MAP2K4) was a direct target of miR-92b. MiR-92b overexpression repressed MAP2K4 expression, while caerulein up-regulated MAP2K4 expression in AR42J cells. The rescue experiments showed that enforced expression of MAP2K4 partially reversed the miR-92b-mediated protective effects on caerulein-induced AR42J cell injury. CONCLUSION In conclusion, we identified miR-216a, miR-216b, miR217, miR-92b, miR-375 and miR-148a as new candidate biomarkers for acute pancreatitis. Further in vitro functional studies revealed that miR-92b attenuated caerulein-induced cell injury and inflammatory responses in AJ42R cells partially via targeting MAP2K4.
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Affiliation(s)
- Benshen Luo
- Department of Emergency Medicine, The Second People's Hospital of Wuhu City, Wuhu City, Anhui Province, 241000, China
| | - Chen Wang
- Department of Emergency Medicine, The Second People's Hospital of Wuhu City, Wuhu City, Anhui Province, 241000, China
| | - Zhengyu Wang
- Department of Emergency Medicine, The Second People's Hospital of Wuhu City, Wuhu City, Anhui Province, 241000, China
| | - Chuanguo Chen
- Department of Emergency Medicine, The Second People's Hospital of Wuhu City, Wuhu City, Anhui Province, 241000, China
| | - Xiaozhuang Peng
- Department of Emergency Medicine, The Second People's Hospital of Wuhu City, Wuhu City, Anhui Province, 241000, China
| | - Qingchun Xu
- Department of Emergency Medicine, The Second People's Hospital of Wuhu City, Wuhu City, Anhui Province, 241000, China
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Hu ZY, Yang ZB, Zhang R, Luo XJ, Peng J. The Protective Effect of Vitexin Compound B-1 on Rat Cerebral I/R Injury through a Mechanism Involving Modulation of miR-92b/NOX4 Pathway. CNS Neurol Disord Drug Targets 2023; 22:137-147. [PMID: 35331124 DOI: 10.2174/1871527321666220324115848] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 01/29/2022] [Accepted: 01/29/2022] [Indexed: 01/01/2023]
Abstract
BACKGROUND Recent studies have uncovered that vitexin compound B-1 (VB-1) can protect neurons against hypoxia/reoxygenation (H/R)-induced oxidative injury through suppressing NOX4 expression. OBJECTIVE The aims of this study are to investigate whether VB-1 can protect the rat brain against ischemia/ reperfusion (I/R) injury and whether its effect on NOX4 expression is related to modulation of certain miRNAs expression. METHODS Rats were subjected to 2 h of cerebral ischemia followed by 24 h of reperfusion to establish an I/R injury model, which showed an increase in neurological deficit score and infarct volume concomitant with an upregulation of NOX4 expression, increase in NOX activity, and downregulation of miR-92b. RESULTS Administration of VB-1 reduced I/R cerebral injury accompanied by a reverse in NOX4 and miR-92b expression. Similar results were achieved in a neuron H/R injury model. Next, we evaluated the association of miR-92b with NOX4 by its mimics in the H/R model. H/R treatment increased neurons apoptosis concomitant with an upregulation of NOX4 and NOX activity while downregulation of miR-92b. All these effects were reversed in the presence of miR-92b mimics, confirming the function of miR-92b in suppressing NOX4 expression. CONCLUSION We conclude the protective effect of VB-1 against rat cerebral I/R injury through a mechanism involving modulation of miR-92b/NOX4 pathway.
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Affiliation(s)
- Zhong-Yang Hu
- Department of Pharmacology, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha 410078, China
- Department of Neurology, The Third Xiangya Hospital of Central South University, Changsha 410013, China
| | - Zhong-Bao Yang
- Department of Pharmacology, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha 410078, China
| | - Ruxu Zhang
- Department of Neurology, The Third Xiangya Hospital of Central South University, Changsha 410013, China
| | - Xiu-Ju Luo
- Department of Laboratory Medicine, The Third Xiangya Hospital of Central South University, Changsha 410013, China
| | - Jun Peng
- Department of Pharmacology, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha 410078, China
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Luo R. CircRNA circ-MYBL2 absorbs precursor miR-92b in the nucleus to suppress its role in enhancing gastric cancer cell proliferation. Am J Med Sci 2022; 364:454-460. [PMID: 35644224 DOI: 10.1016/j.amjms.2022.05.022] [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] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 03/05/2022] [Accepted: 05/09/2022] [Indexed: 01/25/2023]
Abstract
BACKGROUND MM-associated circular RNA (Circ-MYBL2), a circular RNA (circRNA), participates in cancer biology. However, its role in gastric cancer (GC) is unclear. In this study, circ-MYBL2 was predicted to interact with precursor microRNA-92b (miR-92b). We then analyzed the role of circ-MYBL2 in GC and explored its crosstalk with miR-92b. METHODS In this research Circ-MYBL2 and miR-92b (mature and precursor) accumulation was determined using reverse transcription polymerase chain reaction (RT-qPCR). The involvement of circ-MYBL2 in the maturation of miR-92b was analyzed using overexpression assays. The subcellular location of circ-MYBL2 was determined using nuclear fractionation assay. The binding of precursor miR-92b to circ-MYBL2 was analyzed through RNA-RNA pulldown assay. The role of circ-MYBL2 and miR-92b in GC cell proliferation was studied with BrdU assay. RESULTS We found that GC tissues exhibited increased mature miR-92b levels but decreased precursor miR-92b and circ-MYBL2 levels. Circ-MYBL2 was detected in both the nucleus and cytoplasm in GC cells, and it directly interacted with precursor miR-92b. Moreover, circ-MYBL2 overexpression increased precursor miR-92b expression and decreased mature miR-92b level. Furthermore, miR-92b (mature) increased GC cell proliferation, and circ-MYBL2 decreased GC cell proliferation and suppressed the effect of miR-92b on GC cell proliferation. CONCLUSIONS Circ-MYBL2 may absorb precursor miR-92b in the nucleus to suppress its role in promoting gastric cancer cell proliferation.
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Affiliation(s)
- Ruijie Luo
- Department of Critical Care Medicine, Chengdu Wenjiang District People's Hospital, Chengdu City, Sichuan, China.
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Shen Z, Yu Y, Yang Y, Xiao X, Sun T, Chang X, Tang W, Zhu Y, Han X. miR-25 and miR-92b regulate insulin biosynthesis and pancreatic β-cell apoptosis. Endocrine 2022; 76:526-535. [PMID: 35194770 DOI: 10.1007/s12020-022-03016-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 10/01/2021] [Accepted: 02/08/2022] [Indexed: 11/03/2022]
Abstract
PURPOSE Pancreatic β-cell failure is a central hallmark of the pathogenesis of diabetes mellitus; however, the molecular basis underlying chronic inflammation-caused β-cell failure remains unclear. This study reported here specifically assessed the association between miR-25/miR-92b family and β-cell failure in diabetes. METHODS IL-1β and two additional ER stress activators, palmitate and tunicamycin were applied to evaluate the expression level miR-25 by Taqman® RT-PCR. Glucose- and potassium-stimulated insulin secretion assays were performed to assess β-cell function. Dual-luciferase activity, and western blotting assays were utilized for miR-25 target gene verification. CCK-8 and TUNEL staining were used to evaluate β-cell viability and apoptosis. RESULTS miRNA ChIP identified the increased level of miR-25 in INS-1 cells by IL-1β treatment. Expression levels of miR-25 were significantly upregulated with the treatment of IL-1β, palmitate or tunicamycin in both INS-1 cells and human islets. Ectopic elevation of miR-25 recapitulated most featured β-cell defects caused by IL-1β, including inhibition of insulin biosynthesis and increased β-cell apoptosis. These detrimental effects of miR-25 relied on its seed sequence recognition and repressed expression of its target genes Neurod1 and Mcl1. The miR-25/NEUROD1 axis reduced insulin biosynthesis via transcriptional regulation of β-cell specific genes. The miR-25/MCL1 axis caused β-cell apoptosis in a CASPASE-3/PARP1-dependent manner. Comparable impairments were generated by miR-92b and miR-25, emphasizing the redundant biological roles of miRNA family members with the same seed sequence. CONCLUSION MiR-25/miR-92b family plays a major role in β-cell failure occurring under inflammation and diabetes states.
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Affiliation(s)
- Zhiyi Shen
- Key Laboratory of Human Functional Genomics of Jiangsu Province, Department of Biochemistry and Molecular Biology, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
| | - Yongkai Yu
- Key Laboratory of Human Functional Genomics of Jiangsu Province, Department of Biochemistry and Molecular Biology, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
| | - Yuqian Yang
- Key Laboratory of Human Functional Genomics of Jiangsu Province, Department of Biochemistry and Molecular Biology, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
| | - Xiao Xiao
- Key Laboratory of Human Functional Genomics of Jiangsu Province, Department of Biochemistry and Molecular Biology, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
| | - Tong Sun
- Key Laboratory of Human Functional Genomics of Jiangsu Province, Department of Biochemistry and Molecular Biology, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
| | - Xiaoai Chang
- Key Laboratory of Human Functional Genomics of Jiangsu Province, Department of Biochemistry and Molecular Biology, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
| | - Wei Tang
- Department of Endocrinology, Islet Cell Senescence and Function Research Laboratory, Jiangsu Province Geriatric Institute, Nanjing, 210024, Jiangsu, China.
| | - Yunxia Zhu
- Key Laboratory of Human Functional Genomics of Jiangsu Province, Department of Biochemistry and Molecular Biology, Nanjing Medical University, Nanjing, 211166, Jiangsu, China.
| | - Xiao Han
- Key Laboratory of Human Functional Genomics of Jiangsu Province, Department of Biochemistry and Molecular Biology, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
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Chen YC, Hsu PY, Su MC, Chen TW, Hsiao CC, Chin CH, Liou CW, Wang PW, Wang TY, Lin YY, Lee CP, Lin MC. MicroRNA Sequencing Analysis in Obstructive Sleep Apnea and Depression: Anti-Oxidant and MAOA-Inhibiting Effects of miR-15b-5p and miR-92b-3p through Targeting PTGS1-NF-κB-SP1 Signaling. Antioxidants (Basel) 2021; 10:1854. [PMID: 34829725 DOI: 10.3390/antiox10111854] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 11/06/2021] [Accepted: 11/19/2021] [Indexed: 01/10/2023] Open
Abstract
The aim of this study was to identify novel microRNAs related to obstructive sleep apnea (OSA) characterized by intermittent hypoxia with re-oxygenation (IHR) injury. Illumina MiSeq was used to identify OSA-associated microRNAs, which were validated in an independent cohort. The interaction between candidate microRNA and target genes was detected in the human THP-1, HUVEC, and SH-SY5Y cell lines. Next-generation sequencing analysis identified 22 differentially expressed miRs (12 up-regulated and 10 down-regulated) in OSA patients. Enriched predicted target pathways included senescence, adherens junction, and AGE-RAGE/TNF-α/HIF-1α signaling. In the validation cohort, miR-92b-3p and miR-15b-5p gene expressions were decreased in OSA patients, and negatively correlated with an apnea hypopnea index. PTGS1 (COX1) gene expression was increased in OSA patients, especially in those with depression. Transfection with miR-15b-5p/miR-92b-3p mimic in vitro reversed IHR-induced early apoptosis, reactive oxygen species production, MAOA hyperactivity, and up-regulations of their predicted target genes, including PTGS1, ADRB1, GABRB2, GARG1, LEP, TNFSF13B, VEGFA, and CXCL5. The luciferase assay revealed the suppressed PTGS1 expression by miR-92b-3p. Down-regulated miR-15b-5p/miR-92b-3p in OSA patients could contribute to IHR-induced oxidative stress and MAOA hyperactivity through the eicosanoid inflammatory pathway via directly targeting PTGS1-NF-κB-SP1 signaling. Over-expression of the miR-15b-5p/miR-92b-3p may be a new therapeutic strategy for OSA-related depression.
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Shen J, Li G, Zhu Y, Xu Q, Zhou H, Xu K, Huang K, Zhan R, Pan J. Foxo1-induced miR-92b down-regulation promotes blood-brain barrier damage after ischaemic stroke by targeting NOX4. J Cell Mol Med 2021; 25:5269-5282. [PMID: 33955666 PMCID: PMC8178288 DOI: 10.1111/jcmm.16537] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 01/13/2020] [Revised: 03/15/2021] [Accepted: 03/17/2021] [Indexed: 12/14/2022] Open
Abstract
The blood‐brain barrier (BBB) damage is a momentous pathological process of ischaemic stroke. NADPH oxidases 4 (NOX4) boosts BBB damage after ischaemic stroke and its expression can be influenced by microRNAs. This study aimed to probe into whether miR‐92b influenced the BBB damage after ischaemic stroke by regulating NOX4 expression. Here, miR‐92b expression was lessened in the ischaemic brains of rats and oxygen‐glucose deprivation (OGD)‐induced brain microvascular endothelial cells (BMECs). In middle cerebral artery occlusion (MCAo) rats, miR‐92b overexpression relieved the ameliorated neurological function and protected the BBB integrity. In vitro model, miR‐92b overexpression raised the viability and lessened the permeability of OGD‐induced BMECs. miR‐92b targeted NOX4 and regulated the viability and permeability of OGD‐induced BMECs by negatively modulating NOX4 expression. The transcription factor Foxo1 bound to the miR‐92b promoter and restrained its expression. Foxo1 expression was induced by OGD‐induction and its knockdown abolished the effects of OGD on miR‐92b and NOX4 expressions, cell viability and permeability of BMECs. In general, our findings expounded that Foxo1‐induced lessening miR‐92b boosted BBB damage after ischaemic stroke by raising NOX4 expression.
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Affiliation(s)
- Jian Shen
- Department of Neurosurgery, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Ganglei Li
- Department of Neurosurgery, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Yu Zhu
- Department of Neurosurgery, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Qingsheng Xu
- Department of Neurosurgery, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Hengjun Zhou
- Department of Neurosurgery, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Kangli Xu
- Department of Neurosurgery, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Kaiyuan Huang
- Department of Neurosurgery, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Renya Zhan
- Department of Neurosurgery, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Jianwei Pan
- Department of Neurosurgery, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
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10
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Jiang K, Yang J, Song C, He F, Yang L, Li X. Enforced expression of miR-92b blunts E. coli lipopolysaccharide-mediated inflammatory injury by activating the PI3K/AKT/β-catenin pathway via targeting PTEN. Int J Biol Sci 2021; 17:1289-1301. [PMID: 33867846 PMCID: PMC8040465 DOI: 10.7150/ijbs.56933] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 03/01/2021] [Indexed: 02/06/2023] Open
Abstract
Endometritis is a reproductive disorder characterized by an inflammatory response in the endometrium, which causes significant economic losses to the dairy farming industry. MicroRNAs (miRNAs) are implicated in the inflammatory response and immune regulation following infection by pathogenic bacteria. Recent miRNA microarray analysis showed an altered expression of miR-92b in cows with endometritis. In the present study, we set out to investigate the regulatory mechanism of miR-92b in endometritis. Here, qPCR results first validated that miR-92b was down-regulated during endometritis. And then, bovine endometrial epithelial cells (BEND cells) stimulated by high concentration of lipopolysaccharide (LPS) were employed as an in vitro inflammatory injury model. Our data showed that overexpression of miR-92b significantly suppressed the activation of Toll-like receptor 4 (TLR4) and nuclear factor-κB (NF‐κB) in LPS-stimulated BEND cells, thereby reducing pro-inflammatory cytokines release and inhibiting cell apoptosis. Looking into the molecular mechanisms of regulation of inflammatory injury by miR-92b, we observed that overexpression of miR-92b restrained TLR4/NF‐κB by activating the phosphatidylinositol 3-kinase/protein kinase B (PI3K/AKT)/β-catenin pathway. Furthermore, the luciferase reporter assay suggested that miR-92b targeted inhibition of phosphatase and tensin homolog (PTEN), an inhibitor of the PI3K/AKT/β-catenin pathway. Importantly, in vivo experiments confirmed that up-regulation of miR-92b attenuated the pathological injury in an experimental murine model of LPS-induced endometritis. Collectively, these findings show that enforced expression of miR-92b alleviates LPS-induced inflammatory injury by activating the PI3K/AKT/β-catenin pathway via targeting PTEN, suggesting a potential application for miR-92b-based therapy to treat endometritis or other inflammatory diseases.
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Affiliation(s)
- Kangfeng Jiang
- College of Veterinary Medicine, Yunnan Agricultural University, Kunming 650201, Yunnan, People's Republic of China
| | - Jing Yang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, People's Republic of China
| | - Chunlian Song
- College of Veterinary Medicine, Yunnan Agricultural University, Kunming 650201, Yunnan, People's Republic of China
| | - Fengping He
- College of Veterinary Medicine, Yunnan Agricultural University, Kunming 650201, Yunnan, People's Republic of China
| | - Liangyu Yang
- College of Veterinary Medicine, Yunnan Agricultural University, Kunming 650201, Yunnan, People's Republic of China
| | - Xiaobing Li
- College of Veterinary Medicine, Yunnan Agricultural University, Kunming 650201, Yunnan, People's Republic of China
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11
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Liu D, Zou Z, Li G, Pan P, Liang G. Long Noncoding RNA NEAT1 Suppresses Proliferation and Promotes Apoptosis of Glioma Cells Via Downregulating MiR-92b. Cancer Control 2020; 27:1073274819897977. [PMID: 31933377 PMCID: PMC6961147 DOI: 10.1177/1073274819897977] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [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] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND The mechanisms underlying the proliferation and apoptosis of glioma cells remain unelucidated. A recent study has revealed that microRNA-92b (miR-92b) inhibits apoptosis of glioma cells via downregulating DKK3. Notably, long noncoding RNA nuclear-enriched abundant transcript 1 (NEAT1) is predicted to have a possible interaction with miR-92b. OBJECTIVE This study aimed to identify whether NEAT1 affects glioma cell proliferation and apoptosis via regulating miR-92b. METHODS The expression of NEAT1 was compared between glioma tissues and adjacent tissues as well as between glioma cells and normal astrocytes using quantitative real-time polymerase chain reaction. Glioma cell proliferation was determined by using the 3-(4,5-dimethythiazol-2-yl)-2,5-diphenyltetrazolium bromide assay, and glioma cell apoptosis was determined by using the flow cytometry. RESULTS The expression of NEAT1 was low in glioma tissues and cells compared to the normal ones. Overexpression of NEAT1 inhibited proliferation and promoted apoptosis of glioma cell lines (U-87 MG and U251). The interaction between NEAT1 and miR-92b was confirmed using RNA immunoprecipitation, RNA pull-down assay, and luciferase reporter assay. Importantly, the tumor suppressor function of overexpressing NEAT1 was achieved by downregulating miR-92b and subsequently upregulating DKK3. CONCLUSION Our findings indicated that NEAT1 acts as a tumor suppressor in glioma cells, which provides a novel target in overcoming glioma growth.
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Affiliation(s)
- Dongdong Liu
- Department of Neurosurgery, General Hospital of Northern Theater Command, Shenhe District, Shenyang, Liaoning Province, China.,Dalian Medical University, Dalian, China
| | - Zheng Zou
- Department of Neurosurgery, General Hospital of Northern Theater Command, Shenhe District, Shenyang, Liaoning Province, China.,General Hospital of Northern Theater Command Base, Jinzhou Medical University, Shenyang, China
| | - Gen Li
- Department of Neurosurgery, General Hospital of Northern Theater Command, Shenhe District, Shenyang, Liaoning Province, China.,Dalian Medical University, Dalian, China
| | - Pengyu Pan
- Department of Neurosurgery, General Hospital of Northern Theater Command, Shenhe District, Shenyang, Liaoning Province, China
| | - Guobiao Liang
- Department of Neurosurgery, General Hospital of Northern Theater Command, Shenhe District, Shenyang, Liaoning Province, China
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12
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Li N, Huang L, Li Y, Chen X, Yang Y, Hou Y, Qiao C. Lin28B/ miR-92b Promote the Proliferation, Migration, and Invasion in the Pathogenesis of Preeclampsia via the DKK1/Wnt/β-Catenin Pathway. Reprod Sci 2020; 27:815-822. [PMID: 32072603 DOI: 10.1007/s43032-019-00083-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Accepted: 08/26/2019] [Indexed: 02/06/2023]
Abstract
Preeclampsia (PE) is a disease unique to pregnancy and one of the leading causes of maternal and neonatal morbidity and mortality. Our previous study found that Lin28b, an RNA-binding protein stem cell factor, is down-expressed in the placenta of preeclampsia and significantly increases the invasion of HTR-8/SVneo cells in vitro. However, the mechanism of Lin28b's role is unclear. The purpose of this study is to investigate whether Lin28B affects the biological behavior and vascular development of trophoblast cells through miR-92b and downstream signaling pathway DKK1/Wnt/β-catenin. Our study demonstrated that Lin28B promotes trophoblast invasion through miR-92b in HTR-8 cells. Further experiments showed that microRNA-92b could negatively regulate DKK1 expression in placental trophoblasts, thereby inhibiting the activity of Wnt/beta-catenin signaling pathway, thereby inhibiting the migration and invasion of trophoblasts. Furthermore, we explored the expression of DKK1 and β-catenin in the placental tissues of preeclampsia patients and 20 healthy people. This study confirmed that Lin28 acts on DKK1 through miR-92b, which affects the expression of downstream Wnt/β-catenin, inhibits the invasion of trophoblast cells and the development of placental vasculature, and participates in the occurrence of PE.
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Affiliation(s)
- Na Li
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, China.,Department of Obstetrics and Gynecology, Shenyang Forth People's Hospital, Shenyang, Liaoning Province, China.,Key Laboratory of Maternal-Fetal Medicine, China Medical University, Shenyang, Liaoning Province, China.,Key Laboratory of Obstetrics and Gynecology of Higher Education, China Medical University, Shenyang, Liaoning Province, China
| | - Ling Huang
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, China.,Key Laboratory of Maternal-Fetal Medicine, China Medical University, Shenyang, Liaoning Province, China.,Key Laboratory of Obstetrics and Gynecology of Higher Education, China Medical University, Shenyang, Liaoning Province, China
| | - Yuanyuan Li
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, China.,Key Laboratory of Maternal-Fetal Medicine, China Medical University, Shenyang, Liaoning Province, China.,Key Laboratory of Obstetrics and Gynecology of Higher Education, China Medical University, Shenyang, Liaoning Province, China
| | - Xiaobin Chen
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, China.,Key Laboratory of Maternal-Fetal Medicine, China Medical University, Shenyang, Liaoning Province, China.,Key Laboratory of Obstetrics and Gynecology of Higher Education, China Medical University, Shenyang, Liaoning Province, China
| | - Yun Yang
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, China.,Key Laboratory of Maternal-Fetal Medicine, China Medical University, Shenyang, Liaoning Province, China.,Key Laboratory of Obstetrics and Gynecology of Higher Education, China Medical University, Shenyang, Liaoning Province, China
| | - Yue Hou
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, China.,Key Laboratory of Maternal-Fetal Medicine, China Medical University, Shenyang, Liaoning Province, China.,Key Laboratory of Obstetrics and Gynecology of Higher Education, China Medical University, Shenyang, Liaoning Province, China
| | - Chong Qiao
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, China. .,Key Laboratory of Maternal-Fetal Medicine, China Medical University, Shenyang, Liaoning Province, China. .,Key Laboratory of Obstetrics and Gynecology of Higher Education, China Medical University, Shenyang, Liaoning Province, China. .,Shengjing Hospital, China Medical University, No.36, Sanhao street, Shenyang, 110004, China.
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13
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Ni QF, Zhang Y, Yu JW, Hua RH, Wang QH, Zhu JW. miR-92b promotes gastric cancer growth by activating the DAB2IP-mediated PI3K/AKT signalling pathway. Cell Prolif 2019; 53:e12630. [PMID: 31713929 PMCID: PMC6985694 DOI: 10.1111/cpr.12630] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [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: 11/02/2018] [Revised: 03/02/2019] [Accepted: 03/29/2019] [Indexed: 12/12/2022] Open
Abstract
Objectives miR‐92b has been reported to play critical roles in several carcinomas; however, our understanding of the mechanisms by which miR‐92b stimulates gastric cancer (GC) is incomplete. The aim of this study was to investigate the clinical significance and functional relevance of miR‐92b in GC. Materials and methods Expression of miR‐92b in GC and peritumoural tissues was determined using qRT‐PCR, in situ hybridization and bioinformatics. CCK‐8, colony formation and fluorescence‐activated cell sorting assays were utilized to explore the effect of miR‐92b on GC cells. A luciferase reporter assay and Western blotting were employed to verify miR‐92b targeting of DAB2IP. Furthermore, Western blotting was used to evaluate the levels of DAB2IP and PI3K/Akt signalling pathway‐related proteins. Results In this study, we found that miR‐92b was upregulated in GC tissues compared with peritumoural tissues. Overexpression of miR‐92b promoted cell proliferation, colony formation, and G0/G1 transition and decreased apoptosis. Our results indicated that miR‐92b repressed the expression of DAB2IP and that loss of DAB2IP activated the PI3K/AKT signalling pathway. Overexpression of DAB2IP rescued the effects of miR‐92b in GC cells. Finally, our results demonstrated a significant correlation between miR‐92b expression and DAB2IP expression in GC tissues. Conclusions Our results suggest that miR‐92b promotes GC cell proliferation by activating the DAB2IP‐mediated PI3K/AKT signalling pathway. The miR‐92b/DAB2IP/PI3K/AKT signalling axis may be a potential therapeutic target to prevent GC progression.
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Affiliation(s)
- Qing-Feng Ni
- Department of General Surgery, Affiliated Hospital of Nantong University, Nantong, China
| | - Yan Zhang
- Department of Chemotherapy, Affiliated Hospital of Nantong University, Nantong, China
| | - Jia-Wei Yu
- Department of General Surgery, Affiliated Hospital of Nantong University, Nantong, China
| | - Ru-Heng Hua
- Department of General Surgery, Affiliated Hospital of Nantong University, Nantong, China
| | - Qu-Hui Wang
- Department of General Surgery, Affiliated Hospital of Nantong University, Nantong, China
| | - Jian-Wei Zhu
- Department of General Surgery, Affiliated Hospital of Nantong University, Nantong, China
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14
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Sun Y, Feng Y, Zhang G, Xu Y. The endonuclease APE1 processes miR-92b formation, thereby regulating expression of the tumor suppressor LDLR in cervical cancer cells. Ther Adv Med Oncol 2019; 11:1758835919855859. [PMID: 31320936 PMCID: PMC6624912 DOI: 10.1177/1758835919855859] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [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: 10/16/2018] [Accepted: 05/01/2019] [Indexed: 12/25/2022] Open
Abstract
Background The molecular mechanisms underlying cervical cancer require elucidation to identify novel therapeutic targets. Apurinic/apyrimidinic endodeoxyribonuclease 1 (APE1) is a multifunctional apurinic/apyrimidinic (AP) endonuclease that influences the transcription of many cancer-related genes via microRNome regulation. Herein, we examine the role of miR-92b-3p (hereinafter miR-92b), whose processing may be regulated by APE1, in cervical cancer progression. Methods APE1's processing of miR-92b from its pri-miR form was measured by a quantitative reverse transcription polymerase chain reaction (qRT-PCR)-based ratio. APE1's endonuclease activity was measured with AP-site incision assays. APE1-DROSHA interaction was studied with immunofluorescence, confocal and proximity ligation analyses. The miR-92b's targeting of low-density lipoprotein receptor (LDLR) was investigated with luciferase reporter assays. The miR-92b mimics and shRNA-based miR-92b silencing, as well as LDLR overexpression and short interfering RNA (siRNA)-based LDLR silencing, were employed in CaSki and SiHa cervical cancer cells. Cell proliferation and chemosensitivity to paclitaxel and cisplatin were assayed. Cell-cycle progression and apoptosis were assessed by flow cytometry. Tumor growth was studied in a murine xenograft model. Results APE1's endonuclease activity, via association with the DROSHA-processing complex, is necessary for processing mature miR-92b, thereby regulating expression of miR-92b's direct target LDLR. The miR-92b promotes cell proliferation in vitro and in vivo, promotes cell-cycle progression, and reduces apoptosis and chemosensitivity. LDLR silencing recapitulated miR-92b's transformative effects, while LDLR overexpression rescued these effects. Conclusions APE1 enhances miR-92b processing, thereby suppressing LDLR expression and enhancing cervical carcinoma progression. Our identification of the novel APE1-miR-92b-LDLR axis improves our understanding of the complex pathogenesis of cervical carcinoma and reveals a novel therapeutic strategy for combating this disease.
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Affiliation(s)
- Yi Sun
- Department of Clinical Laboratory Medicine, the First People's Hospital of Yunnan Province, No. 157, Jinbi Road, Kunming, Yunnan Province, China
| | - Yun Feng
- Department of Reproductive Gynecology, The First People's Hospital of Yunnan Province, Kunming, Yunnan Province, China
| | - Guiqian Zhang
- Department of Clinical Laboratory Medicine, The First People's Hospital of Yunnan Province, Kunming, Yunnan Province, China
| | - Ya Xu
- Department of Clinical Laboratory Medicine, The First People's Hospital of Yunnan Province, Kunming, Yunnan Province, China
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15
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Min L, Chen L, Liu S, Yu Y, Guo Q, Li P, Zhu S. Loss of Circulating Exosomal miR-92b is a Novel Biomarker of Colorectal Cancer at Early Stage. Int J Med Sci 2019; 16:1231-1237. [PMID: 31588188 PMCID: PMC6775270 DOI: 10.7150/ijms.34540] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Accepted: 07/05/2019] [Indexed: 02/06/2023] Open
Abstract
Early diagnosis of colorectal cancer (CRC) is clinically critical but technically challenging, especially in a minimal-invasive way. Emerging evidence suggests that exosome-encapsulated microRNAs (miRNAs) is a kind of promising cancer biomarker. Here we investigated the predictive potential of exosomal miR-92b in plasma samples obtained from 114 participants [40 CRC, 22 colorectal adenomas (CA), 52 non-neoplasm controls (NC)] by RT-qPCR. We found that exosomal miR-92b level was significantly down-regulated in CRC patients compared with CA and NC patients, especially in CRC at stage II, regardless of lymph node metastasis and invasive depth. The AUC in distinguishing CRC, CA and NC from each other ranged from 0.631 to 0.793, while a higher AUC of 0.830 was achieved in differentiating CRC at clinical stage II/III from NC individuals. Additionally, a logistic model integrating miR-92b with age showed a significantly improved accuracy in distinguishing CRC patients from NC (AUC increased from 0.793 to 0.867). Taken together, our findings indicated that decreased expression of exosome-derived miR-92b in plasma is a promising biomarker for early detection of CRC.
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Affiliation(s)
- Li Min
- Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, National Clinical Research Center for Digestive Disease, Beijing Digestive Disease Center, Beijing Key Laboratory for Precancerous Lesion of Digestive Disease. No.95, Yong'an Rd, Xicheng District, Beijing,100050, P. R. China
| | - Lei Chen
- Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, National Clinical Research Center for Digestive Disease, Beijing Digestive Disease Center, Beijing Key Laboratory for Precancerous Lesion of Digestive Disease. No.95, Yong'an Rd, Xicheng District, Beijing,100050, P. R. China
| | - Si Liu
- Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, National Clinical Research Center for Digestive Disease, Beijing Digestive Disease Center, Beijing Key Laboratory for Precancerous Lesion of Digestive Disease. No.95, Yong'an Rd, Xicheng District, Beijing,100050, P. R. China
| | - Yang Yu
- Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, National Clinical Research Center for Digestive Disease, Beijing Digestive Disease Center, Beijing Key Laboratory for Precancerous Lesion of Digestive Disease. No.95, Yong'an Rd, Xicheng District, Beijing,100050, P. R. China
| | - Qingdong Guo
- Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, National Clinical Research Center for Digestive Disease, Beijing Digestive Disease Center, Beijing Key Laboratory for Precancerous Lesion of Digestive Disease. No.95, Yong'an Rd, Xicheng District, Beijing,100050, P. R. China
| | - Peng Li
- Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, National Clinical Research Center for Digestive Disease, Beijing Digestive Disease Center, Beijing Key Laboratory for Precancerous Lesion of Digestive Disease. No.95, Yong'an Rd, Xicheng District, Beijing,100050, P. R. China
| | - Shengtao Zhu
- Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, National Clinical Research Center for Digestive Disease, Beijing Digestive Disease Center, Beijing Key Laboratory for Precancerous Lesion of Digestive Disease. No.95, Yong'an Rd, Xicheng District, Beijing,100050, P. R. China
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16
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Wang J, Zhao H, Yu J, Xu X, Liu W, Jing H, Li N, Tang Y, Li Y, Cai J, Jin J. MiR-92b targets p57kip2 to modulate the resistance of hepatocellular carcinoma (HCC) to ionizing radiation (IR) -based radiotherapy. Biomed Pharmacother 2018; 110:646-655. [PMID: 30544064 DOI: 10.1016/j.biopha.2018.11.080] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 11/16/2018] [Accepted: 11/19/2018] [Indexed: 01/05/2023] Open
Abstract
Hepatocellular carcinoma (HCC) is one of the most common digestive system malignant tumors. Due to the resistance to radiotherapy, the prognosis in patients with HCC is poor. Based on previous studies and online tools prediction, we hypothesized that miR-92b, which was reported to promote HCC cell proliferation, might bind to p57kip2, a well-known tumor suppressor, to modulate the radioresistance of HCC to ionizing radiation (IR) -based radiotherapy. In the present study, a higher miR-92b expression in HCC tissues and cell lines was observed; a high miR-92b expression was correlated with poorer prognosis in patients with HCC. The overexpression of miR-92b enhanced the radioresistance of HCC to IR treatment by promoting cancer cell proliferation, attenuating cell apoptosis and remove IR-induced cell cycle at G2/M phase. Through directly binding to the 3'-UTR of p57kip2, miR-92b negatively regulated the protein levels of p57kip2; miR-92b inhibition enhanced the cell effect of IR on HCC cells, which could be attenuated by the p57kip2 knockdown, in other words, miR-92b modulated the radioresistance of HCC to IR-based radiotherapy through p57kip2. Taken together, miR-92b inhibits p57kip2 expression in HCC tissues and cell lines, thus enhancing the radioresistance of HCC to IR-based radiotherapy; targeting miR-92b to rescue p57kip2 expression in HCC might help sensitive HCC cells to IR-based radiotherapy.
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Affiliation(s)
- Jianyang Wang
- Department of Radiation Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100021, China
| | - Hong Zhao
- Department of Hepatobiliary Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100021, China
| | - Jing Yu
- Department of Radiation Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100021, China
| | - Xin Xu
- Department of Radiation Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100021, China
| | - Wenyang Liu
- Department of Radiation Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100021, China
| | - Hao Jing
- Department of Radiation Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100021, China
| | - Ning Li
- Department of Radiation Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100021, China
| | - Yuan Tang
- Department of Radiation Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100021, China
| | - Yexiong Li
- Department of Radiation Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100021, China
| | - Jianqiang Cai
- Department of Hepatobiliary Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100021, China.
| | - Jing Jin
- Department of Radiation Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100021, China.
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Abstract
PURPOSE The role of microRNA (miRNA) in cholangiocarcinoma was not clear. The aim of this study was to find the potential diagnostic and prognostic miRNA in cholangiocarcinoma patients. METHODS The miRNA expression profiles in cholangiocarcinoma patients from The Cancer Genome Atlas and Gene Expression Omnibus (GSE53870) were analyzed. The comparison of overall survival was performed using the Kaplan-Meier method. The targeted genes of prognostic miRNA were identified in miRanda, PicTar, or TargetScan, and their cell signaling pathways were analyzed by the Database for Annotation, Visualization and Integrated Discovery. RESULTS In The Cancer Genome Atlas and the Gene Expression Omnibus miRNA dataset, miR-92b and miR-99a were found with concordant directionality, up-regulated and down-regulated, respectively. In The Cancer Genome Atlas survival data, patients with the high level of miR-99b had obviously shorter overall survival time ( P=0.038). However, the level of miR-99a was not found to be significant. The 17 shared target genes of miR-92b were identified, such as DAB21IP, BCL21L11, SPHK2, PER2, and TSC1. The related pathways included positive regulation of transcription, positive regulation of cellular biosynthetic process, regulation of programmed cell death, etc. Conclusion: miR-92b was up-regulated in cholangiocarcinoma compared with normal controls. The high level of miR-92b was associated with adverse outcomes in cholangiocarcinoma patients, which might be partly explained by the targeted genes of miR-92b and their signaling pathways.
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Affiliation(s)
- Min-Hang Zhou
- Department of Geriatric Oncology, The First Affiliated Hospital of the People's Liberation Army General Hospital, Beijing, P.R. China
| | - Hong-Wei Zhou
- Department of Geriatric Oncology, The First Affiliated Hospital of the People's Liberation Army General Hospital, Beijing, P.R. China
| | - Mo Liu
- Department of Geriatric Oncology, The First Affiliated Hospital of the People's Liberation Army General Hospital, Beijing, P.R. China
| | - Jun-Zhong Sun
- Department of Geriatric Oncology, The First Affiliated Hospital of the People's Liberation Army General Hospital, Beijing, P.R. China
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Cheng L, Yang F, Zhou B, Yang H, Yuan Y, Li X, Han S. RAB23, regulated by miR-92b, promotes the progression of esophageal squamous cell carcinoma. Gene 2016; 595:31-38. [PMID: 27659550 DOI: 10.1016/j.gene.2016.09.028] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2016] [Revised: 09/14/2016] [Accepted: 09/17/2016] [Indexed: 11/30/2022]
Abstract
RAB23, a member of Ras-related small GTPase family, has been reported to be up-regulated in several cancer types. However, its biological functions and the underlying molecular mechanisms for its oncogenic roles in esophageal squamous cell carcinoma (ESCC) remain unknown. In this study, we have shown that the expression of RAB23 was elevated in ESCC tissues and ESCC cells. Overexpression of RAB23 promoted the growth and migration of the ESCC cells, while knocking down the expression RAB23 inhibited the growth, migration and metastasis of the ESCC cells. The molecular mechanism study showed that RAB23 activated beta-catenin/TCF signaling and regulated the expression of several target genes. In the further study, it was found that the expression of RAB23 was regulated by the miR-92b. Forced expression of MiR-92b decreased the mRNA and protein level of RAB23, and RAB23 rescued the biological functions of miR-92b. Taken together, this study revealed the oncogenic roles and the regulation of RAB23 in ESCC, suggesting RAB23 might be a therapeutic target.
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Affiliation(s)
- Lina Cheng
- Department of Gastroenterology, People's Hospital of Zhengzhou University (Henan Provincial People's Hospital), Henan Province, China
| | - Fan Yang
- Department of Gastroenterology, People's Hospital of Zhengzhou University (Henan Provincial People's Hospital), Henan Province, China
| | - Bingxi Zhou
- Department of Gastroenterology, People's Hospital of Zhengzhou University (Henan Provincial People's Hospital), Henan Province, China
| | - Hui Yang
- Department of Gastroenterology, People's Hospital of Zhengzhou University (Henan Provincial People's Hospital), Henan Province, China
| | - Yuan Yuan
- Department of Gastroenterology, People's Hospital of Zhengzhou University (Henan Provincial People's Hospital), Henan Province, China
| | - Xiuling Li
- Department of Gastroenterology, People's Hospital of Zhengzhou University (Henan Provincial People's Hospital), Henan Province, China.
| | - Shuangyin Han
- Department of Gastroenterology, People's Hospital of Zhengzhou University (Henan Provincial People's Hospital), Henan Province, China
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Zhu HY, Bai WD, Li J, Tao K, Wang HT, Yang XK, Liu JQ, Wang YC, He T, Xie ST, Hu DH. Peroxisome proliferator-activated receptor-γ agonist troglitazone suppresses transforming growth factor-β1 signalling through miR-92b upregulation-inhibited Axl expression in human keloid fibroblasts in vitro. Am J Transl Res 2016; 8:3460-3470. [PMID: 27648136 PMCID: PMC5009398] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Accepted: 08/08/2016] [Indexed: 06/06/2023]
Abstract
Keloid, a skin benign tumor, is characterized by overgrowth of fibroblasts and the excessive deposition of extracellular matrix in wounded skin. Peroxisome proliferator-activated receptor-γ (PPAR-γ) agonist was recently evaluated to inhibit fibrosis. This study explored the underlying mechanisms. Fibroblasts isolated from 25 keloid patients (KFs) and fibroblasts isolated from healthy controls (NSFBs) were also subjected to treatment with PPAR-γ agonist troglitazone and antagonist GW9662 or for transfection with miR-92 mimics or inhibitor, Axl siRNA, and miR-92b or Axl promoter constructs, as well as being subjected to qRT-PCR, ELISA, Western blot, protein array, luciferase, and ChIP assays. The data demonstrated that TGF-β1 and Axl proteins were significantly elevated in samples from keloid patients, while troglitazone treatment significantly reduced levels of TGF-β1 and Axl mRNA and proteins in KFs. Moreover, knockdown of Axl expression reduced expression of TGF-β1 and its pathway genes (such as α-SMA and Snail). PPAR-γ regulation of Axl expression was through transcriptional activation of miR-92b. miR-92b expression downregulated Axl expression at both mRNA and protein levels, whereas GW9662 completely reversed the inhibitory effects of miR-92b mimics on Axl expression. Gene ontology analysis of miR-92b targeting genes showed that TGF-β and Axl were both potential targets of miR-92b, as confirmed by luciferase assay. These findings demonstrated that PPAR-γ-induced miR-92b expression inhibited Axl expression and in turn reduced expression of TGF-β1 and the downstream genes in KFs, suggesting that targeting of this novel gene pathway may be useful for therapeutic control of fibrosis or keloid.
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Affiliation(s)
- Hua-Yu Zhu
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical UniversityXi’an 710032, Shaanxi, China
| | - Wen-Dong Bai
- Department of Hematology, Urumqi General Hospital of Chinese People’s Liberation ArmyUrumqi, Xinjiang, China
| | - Jun Li
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical UniversityXi’an 710032, Shaanxi, China
| | - Ke Tao
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical UniversityXi’an 710032, Shaanxi, China
| | - Hong-Tao Wang
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical UniversityXi’an 710032, Shaanxi, China
| | - Xue-Kang Yang
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical UniversityXi’an 710032, Shaanxi, China
| | - Jia-Qi Liu
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical UniversityXi’an 710032, Shaanxi, China
| | - Yun-Chuan Wang
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical UniversityXi’an 710032, Shaanxi, China
| | - Ting He
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical UniversityXi’an 710032, Shaanxi, China
| | - Song-Tao Xie
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical UniversityXi’an 710032, Shaanxi, China
| | - Da-Hai Hu
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical UniversityXi’an 710032, Shaanxi, China
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Triozzi PL, Achberger S, Aldrich W, Crabb JW, Saunthararajah Y, Singh AD. Association of tumor and plasma microRNA expression with tumor monosomy-3 in patients with uveal melanoma. Clin Epigenetics 2016; 8:80. [PMID: 27453764 PMCID: PMC4957327 DOI: 10.1186/s13148-016-0243-0] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [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: 01/14/2016] [Accepted: 07/04/2016] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Epigenetic events mediated by methylation and histone modifications have been associated with the development of metastasis in patients with uveal melanoma. The role of epigenetic events mediated by microRNA (miR) is less clear. Tumor and plasma miR expression was examined in patients with primary uveal melanoma with tumor monosomy-3, a predictor of metastasis. RESULTS miR profiling of tumors by microarray found six miRs over-expressed and 19 under-expressed in 33 tumors with monosomy-3 compared to 22 without. None of the miRs differentially expressed in tumors with and without monosomy-3 was differentially expressed in tumors with and without tumor infiltrating lymphocytes. Tumors manifesting monosomy-3 were also characterized by higher levels of TARBP2 and DDX17 and by lower levels of XPO5 and HIWI, miR biogenesis factors. miR profiling of plasma by a quantitative nuclease protection assay found elevated levels of 11 miRs and reduction in four in patients with tumor monosomy-3. Only three miRs differentially expressed in the tumor arrays were detectable in plasma. miRs implicated in uveal melanoma development were not differentially expressed. Elevated plasma levels in patients with tumor monosomy-3 of miR-92b, identified in the tumor array, and of miR-199-5p and miR-223, identified in the plasma array, were confirmed by quantitative real-time polymerase chain reaction. Levels were also higher in patients compared to normal controls. CONCLUSIONS These results support a role for epigenetic mechanisms in the development of metastasis in patients with uveal melanoma and the analysis of miRs as biomarkers of metastatic risk. They also suggest that potentially useful blood miRs may be derived from the host response as well as the tumor.
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Affiliation(s)
- Pierre L Triozzi
- Taussig Cancer Institute, Cleveland Clinic Foundation, Cleveland, OH USA ; Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC 27157 USA
| | - Susan Achberger
- Taussig Cancer Institute, Cleveland Clinic Foundation, Cleveland, OH USA
| | - Wayne Aldrich
- Taussig Cancer Institute, Cleveland Clinic Foundation, Cleveland, OH USA
| | - John W Crabb
- Cole Eye Institute, Cleveland Clinic Foundation, Cleveland, OH USA
| | | | - Arun D Singh
- Cole Eye Institute, Cleveland Clinic Foundation, Cleveland, OH USA
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Zhou Z, Wang Z, Wei H, Wu S, Wang X, Xiao J. Promotion of tumour proliferation, migration and invasion by miR-92b in targeting RECK in osteosarcoma. Clin Sci (Lond) 2016; 130:921-30. [PMID: 26993249 DOI: 10.1042/CS20150509] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Accepted: 03/18/2016] [Indexed: 12/17/2022]
Abstract
MicroRNAs play important roles in the development of cancers. Although miR-92b has been reported to promote the tumorigenesis of some cancers, its role in osteosarcoma remains unknown. In the present study, we focused on the expression, function and mechanisms of miR-92b in osteosarcoma development. The miRNA miR-92b was up-regulated in osteosarcoma cell lines and tissues; miR-92b up-regulation correlated with poor prognosis in osteosarcoma. Overexpression of miR-92b promoted osteosarcoma cell proliferation, migration and invasion, which was abrogated by miR-92b inhibition. Reversion-inducing, cysteine-rich protein with kazal motifs (RECK) was identified as the direct and functional target of miR-92b in osteosarcoma. Importantly, restoring RECK expression abrogated increases in cell growth, motility and invasiveness induced by miR-92b RECK was down-regulated in osteosarcoma tissues, and its expression level negatively correlated with miR-92b Collectively, our results indicate that miR-92b acts as an oncogenic miRNA and may be a therapeutic target in osteosarcoma.
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Song H, Zhang Y, Liu N, Wan C, Zhang D, Zhao S, Kong Y, Yuan L. miR-92b regulates glioma cells proliferation, migration, invasion, and apoptosis via PTEN/Akt signaling pathway. J Physiol Biochem 2016; 72:201-11. [PMID: 26893028 DOI: 10.1007/s13105-016-0470-z] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2015] [Accepted: 02/03/2016] [Indexed: 01/15/2023]
Abstract
Glioblastoma (GBM) is a highly invasive malignant primary brain tumor with neoplastic growth. Despite the progresses made in surgery, chemotherapy, and radiation in recent decade, the prognosis of patients with gliomas remains poor and the average survival time of patients suffering from glioblastoma is still short. As a potential therapy strategy, microRNAs have been considered as new targets for possible cancer treatment. In this study, we found that the miR-92b inhibitors (miR-92b-I) could inhibit the proliferation, migration, invasion, and promote the apoptosis of glioma cells. As a predicted target of miR-92b, phosphatase and tensin homolog (PTEN), also elevated at both mRNA and protein levels. Moreover, the Akt phosphorylation was consistently inhibited. The rescue experiment with miR-92b and PTEN double knockdown resulted in partial reversion of miR-92b-I-induced phenotypes. Taken together, our findings indicated that miR-92b-I could restrain the proliferation, invasion, migration, and stimulate apoptosis of glioma cells by targeting PTEN/Akt signaling pathway. Further investigations will focus on antitumor effect of miR‑92b-I in glioma treatment.
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