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Wang L, Sun H, Wang X, Hou N, Zhao L, Tong D, He K, Yang Y, Song T, Yang J, Huang C. EGR1 mediates miR-203a suppress the hepatocellular carcinoma cells progression by targeting HOXD3 through EGFR signaling pathway. Oncotarget 2018; 7:45302-45316. [PMID: 27244890 PMCID: PMC5216724 DOI: 10.18632/oncotarget.9605] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [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: 02/23/2016] [Accepted: 04/26/2016] [Indexed: 12/21/2022] Open
Abstract
EGR1 plays a critical role in cancer progression. However, its precise role in hepatocellular carcinoma has not been elucidated. In this study, we found that the overexpression of EGR1 suppresses hepatocellular carcinoma cell proliferation and increases cell apoptosis by binding to the miR-203a promoter sequence. In addition, we investigated the function of miR-203a on progression of HCC cells. We verified that the effect of overexpression of miR-203a is consistent with that of EGR1 in regulation of cell progression. Through bioinformatic analysis and luciferase assays, we confirmed that miR-203a targets HOXD3. Silencing HOXD3 could block transition of the G2/M phase, increase cell apoptosis, decrease the expression of cell cycle and apoptosis-related proteins, EGFR, p-AKT, p-ERK, CCNB1, CDK1 and Bcl2 by targeting EGFR through EGFR/AKT and ERK cell signaling pathways. Likewise, restoration of HOXD3 counteracted the effects of miR-203a expression.In conclusion, our findings are the first to demonstrate that EGR1 is a key player in the transcriptional control of miR-203a, and that miR-203a acts as an anti-oncogene to suppress HCC tumorigenesis by targeting HOXD3 through EGFR-related cell signaling pathways.
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Affiliation(s)
- Lumin Wang
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, P.R. China
| | - Hongfei Sun
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, P.R. China
| | - Xiaofei Wang
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, P.R. China
| | - Ni Hou
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, P.R. China
| | - Lingyu Zhao
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, P.R. China
| | - Dongdong Tong
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, P.R. China
| | - Kang He
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, P.R. China
| | - Yang Yang
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, P.R. China
| | - Tusheng Song
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, P.R. China
| | - Jun Yang
- Department of Pathology, Second Affiliated Hospital of Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi, P.R. China
| | - Chen Huang
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, P.R. China.,Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, P.R. China.,Cardiovascular Research Center, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, P.R. China
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2
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Yang Y, Zhao Z, Hou N, Li Y, Wang X, Wu F, Sun R, Han J, Sun H, Song T, Huang C, Shao Y. MicroRNA‑214 targets Wnt3a to suppress liver cancer cell proliferation. Mol Med Rep 2017; 16:6920-6927. [PMID: 28901526 DOI: 10.3892/mmr.2017.7483] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 06/20/2017] [Indexed: 11/09/2022] Open
Abstract
MicroRNAs (miRNAs/miRs) are crucial molecules that act as tumor suppressor genes or oncogenes in human cancer progression. The dysregulation of miRNA expression has been detected in liver cancer. The present study aimed to explore the molecular mechanisms by which miR‑214 affects liver cancer cell proliferation. Reverse transcription‑quantitative polymerase chain reaction was used to determine the expression of miR‑214 in liver cancer cell lines and hepatocellular carcinoma (HCC) tissues. A luciferase reporter assay was performed to determine whether Wnt3a is a target gene of miR‑214. Cell Counting kit‑8 and cell cycle analysis were used to explore the effects of miR‑214 on liver cancer cell proliferation. Immunohistochemistry was used to detect protein expression levels. Wnt3a knockdown was used to determine the function of Wnt3a in liver cancer cell proliferation. The results demonstrated that the expression levels of human miR‑214 were reduced in HCC tissues and liver cancer cell lines compared with in control tissues and cells. Overexpression of miR‑214 and Wnt3a silencing each inhibited liver cancer cell growth. Conversely, inhibition of miR‑214 promoted liver cancer cell growth. The present study indicated that miR‑214 acts as a tumor suppressor and may be considered a promising therapeutic target for the treatment of liver cancer.
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Affiliation(s)
- Yang Yang
- Department of Health Toxicology and Hygiene Inspection, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Zhenghao Zhao
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Ni Hou
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Yulong Li
- Department of Gastroenterology, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi 710068, P.R. China
| | - Xiaofei Wang
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Fei Wu
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Ruifang Sun
- Department of Pathology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Jia Han
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Hongfei Sun
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Tusheng Song
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Chen Huang
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Yuan Shao
- Department of Otorhinolaryngology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
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3
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Liu Y, Zhang C, Zhao L, Du N, Hou N, Song T, Huang C. APPL1 promotes the migration of gastric cancer cells by regulating Akt2 phosphorylation. Int J Oncol 2017; 51:1343-1351. [PMID: 28902365 DOI: 10.3892/ijo.2017.4121] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 08/25/2017] [Indexed: 11/06/2022] Open
Abstract
As a multifunctional adaptor protein, APPL1 (adaptor protein containing pleckstrin homology domain, phosphotyrosine binding domain and a leucine zipper motif 1) is overexpressed in many cancers, and has been implicated in tumorigenesis and tumor progression. The present study investigated the expression of APPL1 in gastric carcinoma and the function in regulating cell migration. We investigated the expression of APPL1 in gastric carcinoma based upon The Cancer Genome Atlas (TCGA) database. The expression of APPL1 in collected gastric carcinoma tissues and cultured cells was measured by qRT-PCR and western blot analysis. Transwell assay and wound healing assay were used to analyze the effects of APPL1 on tumor cell migration. The statistical results based upon TCGA database showed significantly higher expression of APPL1 in gastric carcinoma compared to adjacent normal tissues, and we confirmed these findings by measuring APPL1 expression in collected gastric carcinoma tissues and cultured cells. The results of transwell assay and wound healing assay showed that when APPL1 was silenced by siRNA, cell migration was inhibited and overexpression of APPL1 promoted migration. Western blot results demonstrated that changes in several mesenchymal markers were consistent with the observed reduction or enhancement of cell migration. Importantly, the expression of APPL1 significantly affected the phosphorylation of Akt2. In addition, MMP2 and MMP9, downstream effectors of Akt2 changed accordingly, which is a critical requirement for Akt2-mediated cell migration. The results demonstrate an important new function of APPL1 in regulating cell migration through a mechanism that depends on Akt2 phosphorylation.
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Affiliation(s)
- Yingxun Liu
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, P.R. China
| | - Chunli Zhang
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, P.R. China
| | - Lingyu Zhao
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, P.R. China
| | - Ning Du
- Department of Oncology Surgery, The First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Ni Hou
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, P.R. China
| | - Tusheng Song
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, P.R. China
| | - Chen Huang
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, P.R. China
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4
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Guo B, Zhao Z, Wang Z, Li Q, Wang X, Wang W, Song T, Huang C. MicroRNA-302b-3p Suppresses Cell Proliferation Through AKT Pathway by Targeting IGF-1R in Human Gastric Cancer. Cell Physiol Biochem 2017; 42:1701-1711. [PMID: 28743112 DOI: 10.1159/000479419] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [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: 01/31/2017] [Accepted: 05/15/2017] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND/AIMS MiR-302b is a major microRNA found in human embryonic stem cells and induced pluripotent stem cells. However, its function in gastric cancer progression remains unclear. METHODS Quantitative reverse transcription-PCR was performed to detect the expression levels of miR-302b-3p in gastric cancer tissues. MTT, colony formation, and flow cytometer analyses were conducted to explore the function of miR-302b-3p in MKN-45/SGC-7901 cells. A dual-luciferase reporter was used to validate the bioinformatics-predicted target gene of miR-302b-3p. Western blotting and RNA interference were used to evaluate the expression of the AKT signaling pathway and determine the mechanisms underlying miR-302b-3p-induced anti-tumor effects. RESULTS MiR-302b-3p expression was decreased in gastric cancer tissues and cell lines. Enforced expression of miR-302b suppressed cell proliferation and cell cycle G1-S transition and induced apoptosis. IGF-1R was found to be a direct target of miR-302b-3p, and silencing of IGF-1R resulted in the same biological effects as those induced by miR-302b-3p overexpression in gastric cancer cells. Importantly, both overexpression of miR-302b-3p and silencing of IGF-1R decreased AKT phosphorylation, which modulated AKT related cell cycle regulators (cyclin A2, cyclin D1, CDK2, and CDk6) and apoptotic protein Bax/Bcl-2. CONCLUSION These results indicate the tumor suppressor role of miR-302b-3p in the pathogenesis of gastric cancer.
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Affiliation(s)
- Bo Guo
- Department of cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Zhenghao Zhao
- The ART Center, Northwest women's and Children's Hospital, Xi'an, China
| | - Zhen Wang
- Department of cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Qian Li
- Department of cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Xiaofei Wang
- Department of cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Wenjing Wang
- Department of Hepatobiliary Surgery, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Tusheng Song
- Department of cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Che Huang
- Department of cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, China.,Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, Stomatology College of Xi'an Jiaotong University, Xi'an, China.,Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education of China, Xi'an, China
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5
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Qin Y, Chen Y, Yang J, Wu F, Zhao L, Yang F, Xue P, Shi Z, Song T, Huang C. Serum glycopattern and Maackia amurensis lectin-II binding glycoproteins in autism spectrum disorder. Sci Rep 2017; 7:46041. [PMID: 28485374 PMCID: PMC5423032 DOI: 10.1038/srep46041] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Accepted: 03/07/2017] [Indexed: 12/12/2022] Open
Abstract
The pathophysiology of autistic spectrum disorder (ASD) is not fully understood and there are no diagnostic or predictive biomarkers. Glycosylation modified as many as 70% of all human proteins can sensitively reflect various pathological changes. However, little is known about the alterations of glycosylation and glycoproteins in ASD. In this study, serum glycopattern and the maackia amurensis lectin-II binding glycoproteins (MBGs) in 65 children with ASD and 65 age-matched typically developing (TD) children were compared by using lectin microarrays and lectin-magnetic particle conjugate-assisted LC-MS/MS analyses. Expression of Siaα2-3 Gal/GalNAc was significantly increased in pooled (fold change = 3.33, p < 0.001) and individual (p = 0.009) serum samples from ASD versus TD children. A total of 194 and 217 MGBs were identified from TD and ASD sera respectively, of which 74 proteins were specially identified or up-regulated in ASD. Bioinformatic analysis revealed abnormal complement cascade and aberrant regulation of response-to-stimulus that might be novel makers or markers for ASD. Moreover, increase of APOD α2-3 sialoglycosylation could sensitively and specifically distinguish ASD samples from TD samples (AUC is 0.88). In conclusion, alteration of MBGs expression and their sialoglycosylation may serve as potential biomarkers for diagnosis of ASD, and provide useful information for investigations into the pathogenesis of ASD.
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Affiliation(s)
- Yannan Qin
- Department of Cell Biology and Genetics, Environment and Genes Related to Diseases Key Laboratory of Education Ministry, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, P. R. China
| | - Yanni Chen
- Xi'an Child's Hospital of Medical College of Xi'an Jiaotong University, Xi'an Child's Hospital, Xi'an 710002, P. R. China
| | - Juan Yang
- Department of Cell Biology and Genetics, Environment and Genes Related to Diseases Key Laboratory of Education Ministry, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, P. R. China
| | - Fei Wu
- Department of Cell Biology and Genetics, Environment and Genes Related to Diseases Key Laboratory of Education Ministry, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, P. R. China
| | - Lingyu Zhao
- Department of Cell Biology and Genetics, Environment and Genes Related to Diseases Key Laboratory of Education Ministry, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, P. R. China
| | - Fuquan Yang
- Laboratory of Proteomics, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, P. R. China
| | - Peng Xue
- Laboratory of Proteomics, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, P. R. China
| | - Zhuoyue Shi
- The Department of Biology, College of Liberal Arts and Science, The University of Iowa, Iowa 430015, USA
| | - Tusheng Song
- Department of Cell Biology and Genetics, Environment and Genes Related to Diseases Key Laboratory of Education Ministry, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, P. R. China
| | - Chen Huang
- Department of Cell Biology and Genetics, Environment and Genes Related to Diseases Key Laboratory of Education Ministry, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, P. R. China
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6
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Qin Y, Zhao L, Wang X, Tong D, Hoover C, Wu F, Liu Y, Wang L, Liu L, Ni L, Song T, Huang C. MeCP2 regulated glycogenes contribute to proliferation and apoptosis of gastric cancer cells. Glycobiology 2017; 27:306-317. [PMID: 28100567 DOI: 10.1093/glycob/cwx006] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Accepted: 01/16/2017] [Indexed: 11/14/2022] Open
Abstract
Aberrant glycogene and glycan expression is intimately associated with carcinogenesis, invasion, and metastasis of gastric cancer (GC); however the regulatory mechanisms for glycogenes in GC cells remain unclear. Methyl-CpG-binding protein 2 (MeCP2) regulates genes by binding to methylated promoters, and in our previous work we found that it is overexpressed in GC cell lines and tissues, functioning as an oncogene. In this study we detected the expression of 212 glycogenes in MeCP2 silenced GC cells versus control using the Agilent Whole Human Genome Microarray and mining the data through bioinformatic analysis. A total of 10 glycogenes exhibited increased expression (FC ≥ 2, P < 0.05), while 16 showed decreased expression (FC ≤ 2, P < 0.05) in the MeCP2 silenced cells, which corresponded to down-regulation of Lewis antigens (UEA-I), T/Tn antigens (PNA), and mature N-glycans (PHA-E and PHA-E+L) and up-regulation of lactosylceramide, a precursor oligosaccharide of N-glycans. Examination of the TCGA Gastric Cancer databases demonstrated that nine glycogenes (24.6%) were oppositely regulated by MeCP2 in MeCP2 knockdown BGC-823 cells relative to their expression level in GC tissues, and might be downstream genes of MeCP2. Individual gene analysis suggested that neutral alpha-glucosidase AB (GANAB) knockdown can rescue the effects of MeCP2 overexpression on GC cells. MeCP2 promotes GANAB by binding to the second methylated CpG island (206 bp, -12916 to -13122) of the GANAB promoter. In conclusion, glycogenes can be either up- or down-regulated by MeCP2 directly or indirectly to alter the glycopatterning and affect the proliferation and apoptosis of GC cells.
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Affiliation(s)
- Yannan Qin
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, PR China
- Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education of China, Xi'an, PR China
| | - Lingyu Zhao
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, PR China
- Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education of China, Xi'an, PR China
| | - Xiaofei Wang
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, PR China
- Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education of China, Xi'an, PR China
| | - Dongdong Tong
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, PR China
- Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education of China, Xi'an, PR China
| | - Christopher Hoover
- Department of Biochemistry and Molecular Biology, University of OklahomaHealth Science Center, Oklahoma City, OK, USA
| | - Fei Wu
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, PR China
- Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education of China, Xi'an, PR China
| | - Yingxun Liu
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, PR China
- Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education of China, Xi'an, PR China
| | - Lumin Wang
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, PR China
- Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education of China, Xi'an, PR China
| | - Liying Liu
- Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education of China, Xi'an, PR China
| | - Lei Ni
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, PR China
| | - Tusheng Song
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, PR China
| | - Chen Huang
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, PR China
- Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education of China, Xi'an, PR China
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7
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Wang L, Yao J, Sun H, He K, Tong D, Song T, Huang C. MicroRNA-101 suppresses progression of lung cancer through the PTEN/AKT signaling pathway by targeting DNA methyltransferase 3A. Oncol Lett 2016; 13:329-338. [PMID: 28123563 PMCID: PMC5245075 DOI: 10.3892/ol.2016.5423] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [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: 07/13/2015] [Accepted: 10/28/2016] [Indexed: 11/17/2022] Open
Abstract
It is well established that transcriptional silencing of critical tumor suppressor genes by DNA methylation is a fundamental process in the initiation of lung cancer. However, the involvement of microRNAs (miRNAs) in restoring abnormal DNA methylation patterns in lung cancer is not well understood. Therefore, and since miRNA-101 is complementary to the 3′-untranslated region of DNA methyltransferase 3A (DNMT3A), we investigated whether miRNA-101 could restore normal DNA methylation patterns in lung cancer cell lines. Bioinformatics has indicated that DNMT3A is a major target of miR-101. In addition, the overexpression of miR-101 downregulates DNMT3A. Using a methylation-specific polymerase chain reaction assay, we demonstrated that methylation of the phosphatase and tensin homolog (PTEN) promoter was reduced in A549 cells transfected with miR-101, but not in the transfected control. Furthermore, overexpression of miR-101 and silencing of DNMT3A suppressed lung cell proliferation and S/G2 transition, and increased apoptosis through the PTEN/AKT pathway in vitro. Furthermore, we observed the opposite phenomenon in A549 cells transfected with a miR-101 inhibitor. Subsequent investigation revealed that overexpression of miR-101 significantly inhibited the tumorigenicity of A549 cells in a nude mouse xenograft model. These results demonstrate that miR-101 affects lung cancer progression through the PTEN/AKT signaling pathway by targeting DNMT3A in lung cells, suggesting that miR-101 may be a novel potential therapeutic strategy in lung cancer treatment.
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Affiliation(s)
- Lumin Wang
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, P.R. China
| | - Jiayi Yao
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, P.R. China
| | - Hongfei Sun
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, P.R. China
| | - Kang He
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, P.R. China
| | - Dongdong Tong
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, P.R. China
| | - Tusheng Song
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, P.R. China
| | - Chen Huang
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, P.R. China; Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, P.R. China; Cardiovascular Research Center, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, P.R. China
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8
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Yang J, Zhang X, Xiong X, Wu Q, Zhao L, Liu L, Qin Y, Song T, Huang C. Retraction Note to: Effects of a Terrified-Sound Stress on Serum Proteomic Profiling in Mice. J Mol Neurosci 2016; 60:276. [PMID: 27566168 DOI: 10.1007/s12031-016-0816-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- Juan Yang
- Department of Cell Biology and Genetics, Basic Medical School, Xi'an Jiaotong University, 76 Western Yanta Road, Xi'an, Shaanxi, 710061, China.,Key Laboratory of Environment and Disease-Related Gene, Ministry of Education, Xi'an Jiaotong University, 76 Western Yanta Road, Xi'an, Shaanxi, 710061, China
| | - Xin Zhang
- Assisted Reproduction Center, Maternal & Child Health Care Hospital, Xi'an, Shaanxi, 710003, China
| | - Xiaofan Xiong
- Department of Cell Biology and Genetics, Basic Medical School, Xi'an Jiaotong University, 76 Western Yanta Road, Xi'an, Shaanxi, 710061, China
| | - Qiuhua Wu
- Department of Cell Biology and Genetics, Basic Medical School, Xi'an Jiaotong University, 76 Western Yanta Road, Xi'an, Shaanxi, 710061, China
| | - Lingyu Zhao
- Department of Cell Biology and Genetics, Basic Medical School, Xi'an Jiaotong University, 76 Western Yanta Road, Xi'an, Shaanxi, 710061, China
| | - Liying Liu
- Key Laboratory of Environment and Disease-Related Gene, Ministry of Education, Xi'an Jiaotong University, 76 Western Yanta Road, Xi'an, Shaanxi, 710061, China
| | - Yannan Qin
- Department of Cell Biology and Genetics, Basic Medical School, Xi'an Jiaotong University, 76 Western Yanta Road, Xi'an, Shaanxi, 710061, China
| | - Tusheng Song
- Department of Cell Biology and Genetics, Basic Medical School, Xi'an Jiaotong University, 76 Western Yanta Road, Xi'an, Shaanxi, 710061, China
| | - Chen Huang
- Department of Cell Biology and Genetics, Basic Medical School, Xi'an Jiaotong University, 76 Western Yanta Road, Xi'an, Shaanxi, 710061, China. .,Key Laboratory of Environment and Disease-Related Gene, Ministry of Education, Xi'an Jiaotong University, 76 Western Yanta Road, Xi'an, Shaanxi, 710061, China.
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9
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Chen Y, Wang X, Cheng J, Wang Z, Jiang T, Hou N, Liu N, Song T, Huang C. MicroRNA-20a-5p targets RUNX3 to regulate proliferation and migration of human hepatocellular cancer cells. Oncol Rep 2016; 36:3379-3386. [DOI: 10.3892/or.2016.5144] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Accepted: 08/17/2016] [Indexed: 11/05/2022] Open
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10
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Chang S, Gao L, Yang Y, Tong D, Guo B, Liu L, Li Z, Song T, Huang C. miR-145 mediates the antiproliferative and gene regulatory effects of vitamin D3 by directly targeting E2F3 in gastric cancer cells. Oncotarget 2016; 6:7675-85. [PMID: 25762621 PMCID: PMC4480708 DOI: 10.18632/oncotarget.3048] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [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: 10/20/2014] [Accepted: 01/06/2015] [Indexed: 12/19/2022] Open
Abstract
VitaminD3 signaling is involved in inhibiting the development and progression of gastric cancer (GC), while the active vitamin D metabolite 1-alpha,25-dihydroxyvitamin D3 (1,25(OH)2D3)-mediated gene regulatory mechanisms in GC remain unclear. We found that miR-145 is induced by 1,25(OH)2D3 in a dose- and vitamin D receptor (VDR)-dependent manner in GC cells. Inhibition of miR-145 reverses the antiproliferative effect of 1,25(OH)2D3. Furthermore, miR-145 expression was lower in tumors compared with matched normal samples and correlated with increased the E2F3 transcription factor protein staining. Overexpression of miR-145 inhibited colony formation, cell viability and induced cell arrest in S-phase in GC cells by targeting E2F3 and CDK6. miR-145 inhibition consistently abrogates the 1,25(OH)2D3-mediated suppression of E2F3, CDK6, CDK2 and CCNA2 genes. Altogether, our results indicate that miR-145 mediates the antiproliferative and gene regulatory effects of vitamin D3 in GC cells and might hold promise for prognosis and therapeutic strategies for GC treatment.
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Affiliation(s)
- Su'e Chang
- Department of Genetics and Molecular Biology/Key Laboratory of Environment and Genes Related to Diseases, College of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi, P. R. China
| | - Ling Gao
- Department of Genetics and Molecular Biology/Key Laboratory of Environment and Genes Related to Diseases, College of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi, P. R. China.,Department of Oral Maxillofacial Surgery, Stomatology Hospital of Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi, P. R. China
| | - Yang Yang
- Department of Genetics and Molecular Biology/Key Laboratory of Environment and Genes Related to Diseases, College of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi, P. R. China
| | - Dongdong Tong
- Department of Genetics and Molecular Biology/Key Laboratory of Environment and Genes Related to Diseases, College of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi, P. R. China
| | - Bo Guo
- Department of Genetics and Molecular Biology/Key Laboratory of Environment and Genes Related to Diseases, College of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi, P. R. China
| | - Liying Liu
- Department of Genetics and Molecular Biology/Key Laboratory of Environment and Genes Related to Diseases, College of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi, P. R. China
| | - Zongfang Li
- Department of General Surgery, The Second Affiliated Hospital, School of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi, P. R. China
| | - Tusheng Song
- Department of Genetics and Molecular Biology/Key Laboratory of Environment and Genes Related to Diseases, College of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi, P. R. China
| | - Chen Huang
- Department of Genetics and Molecular Biology/Key Laboratory of Environment and Genes Related to Diseases, College of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi, P. R. China
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11
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Yang J, Li W, Liu S, Yuan D, Guo Y, Jia C, Song T, Huang C. Identification of novel serum peptide biomarkers for high-altitude adaptation: a comparative approach. Sci Rep 2016; 6:25489. [PMID: 27150491 PMCID: PMC4858689 DOI: 10.1038/srep25489] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Accepted: 04/18/2016] [Indexed: 01/06/2023] Open
Abstract
We aimed to identify serum biomarkers for screening individuals who could adapt to high-altitude hypoxia at sea level. HHA (high-altitude hypoxia acclimated; n = 48) and HHI (high-altitude hypoxia illness; n = 48) groups were distinguished at high altitude, routine blood tests were performed for both groups at high altitude and at sea level. Serum biomarkers were identified by comparing serum peptidome profiling between HHI and HHA groups collected at sea level. Routine blood tests revealed the concentration of hemoglobin and red blood cells were significantly higher in HHI than in HHA at high altitude. Serum peptidome profiling showed that ten significantly differentially expressed peaks between HHA and HHI at sea level. Three potential serum peptide peaks (m/z values: 1061.91, 1088.33, 4057.63) were further sequence identified as regions of the inter-α trypsin inhibitor heavy chain H4 fragment (ITIH4 347–356), regions of the inter-α trypsin inhibitor heavy chain H1 fragment (ITIH1 205–214), and isoform 1 of fibrinogen α chain precursor (FGA 588–624). Expression of their full proteins was also tested by ELISA in HHA and HHI samples collected at sea level. Our study provided a novel approach for identifying potential biomarkers for screening people at sea level who can adapt to high altitudes.
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Affiliation(s)
- Juan Yang
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, P. R. China.,Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education of China, Xi'an 710061, P. R. China
| | - Wenhua Li
- Xizang Minzu University Medical School, Xianyang 712082, P. R. China
| | - Siyuan Liu
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, P. R. China.,Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education of China, Xi'an 710061, P. R. China
| | - Dongya Yuan
- Xizang Minzu University Medical School, Xianyang 712082, P. R. China
| | - Yijiao Guo
- Xizang Minzu University Medical School, Xianyang 712082, P. R. China
| | - Cheng Jia
- Xizang Minzu University Medical School, Xianyang 712082, P. R. China
| | - Tusheng Song
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, P. R. China.,Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education of China, Xi'an 710061, P. R. China
| | - Chen Huang
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, P. R. China.,Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education of China, Xi'an 710061, P. R. China
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12
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Yang J, Xiong X, Liu S, Zhu J, Luo M, Liu L, Zhao L, Qin Y, Song T, Huang C. Identification of novel serum peptides biomarkers for female breast cancer patients in Western China. Proteomics 2016; 16:925-34. [PMID: 26705257 DOI: 10.1002/pmic.201500321] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [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: 08/12/2015] [Revised: 10/19/2015] [Accepted: 12/18/2015] [Indexed: 11/09/2022]
Abstract
This study aimed to identify novel serum peptides biomarkers for female breast cancer (BC) patients. We analyzed the serum proteomic profiling of 247 serum samples from 96 BC patients, 48 additional paired pre- and postoperative BC patients, 39 fibroadenoma patients as benign disease controls, and 64 healthy controls, using magnetic-bead-based separation followed by MALDI-TOF MS. ClinProTools software identified 78 m/z peaks that differed among all analyzed groups, ten peaks were significantly different (P < 0.0001), with Peaks 1-6 upregulated and Peaks 7-10 downregulated in BC. Moreover, three peaks of ten (Peak 1, m/z: 2660.11; Peak 2, m/z: 1061.09; Peak 10, m/z: 1041.25) showed a tendency to return to healthy control values after surgery. And these three peptide biomarkers were identified as FGA605-629, ITIH4 347-356, and APOA2 43-52. Methods used in this study could generate serum peptidome profiles of BC, and provide a new approach to identify potential biomarkers for diagnosis as well as prognosis of this malignancy.
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Affiliation(s)
- Juan Yang
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University, Health Science Center, Xi'an, P. R. China.,Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education of China, Xi'an, P. R. China
| | - Xiaofan Xiong
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University, Health Science Center, Xi'an, P. R. China.,Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education of China, Xi'an, P. R. China
| | - Siyuan Liu
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University, Health Science Center, Xi'an, P. R. China.,Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education of China, Xi'an, P. R. China
| | - Jiang Zhu
- Department of Mastopathy, Shaanxi Provincial Tumor Hospital, Xi'an, P. R. China
| | - Mai Luo
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University, Health Science Center, Xi'an, P. R. China.,Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education of China, Xi'an, P. R. China
| | - Liying Liu
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University, Health Science Center, Xi'an, P. R. China.,Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education of China, Xi'an, P. R. China
| | - Lingyu Zhao
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University, Health Science Center, Xi'an, P. R. China.,Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education of China, Xi'an, P. R. China
| | - Yannan Qin
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University, Health Science Center, Xi'an, P. R. China.,Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education of China, Xi'an, P. R. China
| | - Tusheng Song
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University, Health Science Center, Xi'an, P. R. China.,Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education of China, Xi'an, P. R. China
| | - Chen Huang
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University, Health Science Center, Xi'an, P. R. China.,Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education of China, Xi'an, P. R. China
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13
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He K, Tong D, Zhang S, Cai D, Wang L, Yang Y, Gao L, Chang S, Guo B, Song T, Li A, Huang C. miRNA-99b-3p functions as a potential tumor suppressor by targeting glycogen synthase kinase-3β in oral squamous cell carcinoma Tca-8113 cells. Int J Oncol 2015; 47:1528-36. [PMID: 26315788 DOI: 10.3892/ijo.2015.3135] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 08/17/2015] [Indexed: 11/06/2022] Open
Abstract
Dysregulation of microRNAs (miRNAs) has been associated with carcinogenesis in oral squamous cell carcinoma (OSCC). In the present study, we investigated the expression and function of miR-99b-3p in human OSCC. We found that the expression levels of miR-99b-3p decreased in 21 clinical OSCC samples (84%). Furthermore, ectopic expression of miR-99b-3p inhibited OSCC cell proliferation by downregulating glycogen synthase kinase-3β (GSK3β), an miR-99b-3p' target gene, at the mRNA and protein levels, both in vitro and in vivo. Moreover, the silencing of GSK3β recapitulated the cellular and molecular effects in a similar manner to the overexpression of miR-99b-3p, which included inhibition of OSCC cell proliferation and suppression of p65 (RelA) and G1 regulators (cyclin D1, CDK4 and CDK6) in vitro. Our data suggest that miR-99b-3p functions as a tumor suppressor in OSCC via GSK3β downregulation.
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Affiliation(s)
- Kang He
- Department of Periodontology, Stomatology Hospital of Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi 710004, P.R. China
| | - Dongdong Tong
- Department of Genetics and Molecular Biology, Key Laboratory of Environment and Genes Related to Diseases, College of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Si Zhang
- Department of Stomatology, First Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi 710077, P.R. China
| | - Donghui Cai
- Department of Genetics and Molecular Biology, Key Laboratory of Environment and Genes Related to Diseases, College of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Lumin Wang
- Department of Genetics and Molecular Biology, Key Laboratory of Environment and Genes Related to Diseases, College of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Yang Yang
- Department of Genetics and Molecular Biology, Key Laboratory of Environment and Genes Related to Diseases, College of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Ling Gao
- Department of Oral Maxillofacial Surgery, Stomatology Hospital of Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi 710004, P.R. China
| | - Su'e Chang
- Department of Genetics and Molecular Biology, Key Laboratory of Environment and Genes Related to Diseases, College of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Bo Guo
- Department of Genetics and Molecular Biology, Key Laboratory of Environment and Genes Related to Diseases, College of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Tusheng Song
- Department of Genetics and Molecular Biology, Key Laboratory of Environment and Genes Related to Diseases, College of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Ang Li
- Department of Periodontology, Stomatology Hospital of Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi 710004, P.R. China
| | - Chen Huang
- Department of Genetics and Molecular Biology, Key Laboratory of Environment and Genes Related to Diseases, College of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
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14
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Wang L, Yao J, Sun H, Sun R, Chang S, Yang Y, Song T, Huang C. miR-302b suppresses cell invasion and metastasis by directly targeting AKT2 in human hepatocellular carcinoma cells. Tumour Biol 2015; 37:847-55. [PMID: 26254095 DOI: 10.1007/s13277-015-3330-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Accepted: 03/12/2015] [Indexed: 12/31/2022] Open
Abstract
MicroRNAs (miRNAs) have been shown to play essential roles in regulating the activity of human hepatocellular carcinoma (HCC) cells, thereby contributing to the suppression of invasion and metastasis. In this study, using gain and loss of function assays, we demonstrated that miR-302b was frequently down-regulated in clinical HCC specimens, as compared with 15 corresponding adjacent normal tissues. Overexpression of miR-302b suppressed HCC cell invasion and metastasis. Regulation of NF-κB and matrix metalloproteinase (MMP)-2 expression by miR-302b was mediated via AKT2 in SMMC-7721 cells. Silencing AKT2 produced effects similar to those of miR-302b overexpression, which included inhibiting SMMC-7721 cell invasion and metastasis and dereasing NF-κB and MMP-2 expression. Furthermore, overexpression of AKT2 attenuated the effects of miR-302b overexpression. Taken together, our findings indicate that miR-302b inhibits SMMC-7721 cell invasion and metastasis by targeting AKT2, suggesting that miR-302b might represent a potential therapeutic target for HCC intervention.
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Affiliation(s)
- Lumin Wang
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Jiayi Yao
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Hongfei Sun
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Reifang Sun
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Su'e Chang
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Yang Yang
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Tusheng Song
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Chen Huang
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University Health Science Center, Xi'an, China.
- Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China.
- Cardiovascular Research Center, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, People's Republic of China.
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15
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Hou N, Han J, Li J, Liu Y, Qin Y, Ni L, Song T, Huang C. MicroRNA profiling in human colon cancer cells during 5-fluorouracil-induced autophagy. PLoS One 2014; 9:e114779. [PMID: 25526515 PMCID: PMC4272278 DOI: 10.1371/journal.pone.0114779] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Accepted: 11/13/2014] [Indexed: 11/18/2022] Open
Abstract
Autophagy modulation is now recognized as a potential therapeutic approach for cancer (including colorectal cancer), yet the molecular mechanisms regulating autophagy in response to cellular stress are still not well understood. MicroRNAs (miRNAs) have been found to play important roles in controlling many cellular functions, including growth, metabolism and stress response. The physiological importance of the miRNA-autophagy interconnection is only beginning to be elucidated. MiRNA microarray technology facilitates analysis of global miRNA expression in certain situations. In this study, we explored the expression profile of miRNAs during the response of human colon cancer cells (HT29s) to 5-FU treatment and nutrient starvation using miRNA microarray analysis. The alteration of miRNA expression showed the same pattern under both conditions was further testified by qRT-PCR in three human colon cancer cell lines. In addition, bioinformatic prediction of target genes, pathway analysis and gene network analysis were performed to better understand the roles of these miRNAs in the regulation of autophagy. We identified and selected four downregulated miRNAs including hsa-miR-302a-3p and 27 upregulated miRNAs under these two conditions as having the potential to target genes involved in the regulation of autophagy in human colon cancer cells. They have the potential to modulate autophagy in 5-FU-based chemotherapy in colorectal cancer.
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Affiliation(s)
- Ni Hou
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University School of Medicine, Xi'an, China
| | - Jia Han
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University School of Medicine, Xi'an, China
| | - Jie Li
- Department of General Surgery, the Second Affiliated Hospital, Xi'an Jiaotong University School of Medicine, Xi'an, China
| | - Yingxun Liu
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University School of Medicine, Xi'an, China
| | - Yannan Qin
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University School of Medicine, Xi'an, China
| | - Lei Ni
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University School of Medicine, Xi'an, China
| | - Tusheng Song
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University School of Medicine, Xi'an, China
| | - Chen Huang
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University School of Medicine, Xi'an, China
- Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University School of Medicine, Xi'an, China
- Cardiovascular Research Center, Xi'an Jiaotong University School of Medicine, Xi'an, China
- * E-mail:
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16
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Yang J, Yang J, Gao Y, Zhao L, Liu L, Qin Y, Wang X, Song T, Huang C. Identification of potential serum proteomic biomarkers for clear cell renal cell carcinoma. PLoS One 2014; 9:e111364. [PMID: 25368985 PMCID: PMC4219714 DOI: 10.1371/journal.pone.0111364] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Accepted: 09/23/2014] [Indexed: 12/23/2022] Open
Abstract
Objective To investigate discriminating protein patterns and serum biomarkers between clear cell renal cell carcinoma (ccRCC) patients and healthy controls, as well as between paired pre- and post-operative ccRCC patients. Methods We used magnetic bead-based separation followed by matrix-assisted laser desorption ionization (MALDI) time-of-flight (TOF) mass spectrometry (MS) to identify patients with ccRCC. A total of 162 serum samples were analyzed in this study, among which there were 58 serum samples from ccRCC patients, 40 from additional paired pre- and post-operative ccRCC patients (n = 20), and 64 from healthy volunteers as healthy controls. ClinProTools software identified several distinct markers between ccRCC patients and healthy controls, as well as between pre- and post-operative patients. Results Patients with ccRCC could be identified with a mean sensitivity of 88.38% and a mean specificity of 91.67%. Of 67 m/z peaks that differed among the ccRCC, healthy controls, pre- and post-operative ccRCC patients, 24 were significantly different (P<0.05). Three candidate peaks, which were upregulated in ccRCC group and showed a tendency to return to healthy control values after surgery, were identified as peptide regions of RNA-binding protein 6 (RBP6), tubulin beta chain (TUBB), and zinc finger protein 3 (ZFP3) with the m/z values of 1466.98, 1618.22, and 5905.23, respectively. Conclusion MB-MALDI-TOF-MS method could generate serum peptidome profiles of ccRCC, and provide a new approach to identify potential biomarkers for diagnosis as well as prognosis of this malignancy.
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Affiliation(s)
- Juan Yang
- Key Laboratory of Environment and Genes Related to Diseases of the Education Ministry, Department of Genetics and Molecular Biology, Medical School of Xi′an Jiaotong University, Xi′an, China
| | - Jin Yang
- Department of Medical Oncology, First Affiliated Hospital of Medical School of Xi'an Jiaotong University, Xi′an, China
| | - Yan Gao
- Department of Medical Oncology, First Affiliated Hospital of Medical School of Xi'an Jiaotong University, Xi′an, China
| | - Lingyu Zhao
- Key Laboratory of Environment and Genes Related to Diseases of the Education Ministry, Department of Genetics and Molecular Biology, Medical School of Xi′an Jiaotong University, Xi′an, China
| | - Liying Liu
- Key Laboratory of Environment and Genes Related to Diseases of the Education Ministry, Department of Genetics and Molecular Biology, Medical School of Xi′an Jiaotong University, Xi′an, China
| | - Yannan Qin
- Key Laboratory of Environment and Genes Related to Diseases of the Education Ministry, Department of Genetics and Molecular Biology, Medical School of Xi′an Jiaotong University, Xi′an, China
| | - Xiaofei Wang
- Key Laboratory of Environment and Genes Related to Diseases of the Education Ministry, Department of Genetics and Molecular Biology, Medical School of Xi′an Jiaotong University, Xi′an, China
| | - Tusheng Song
- Key Laboratory of Environment and Genes Related to Diseases of the Education Ministry, Department of Genetics and Molecular Biology, Medical School of Xi′an Jiaotong University, Xi′an, China
| | - Chen Huang
- Key Laboratory of Environment and Genes Related to Diseases of the Education Ministry, Department of Genetics and Molecular Biology, Medical School of Xi′an Jiaotong University, Xi′an, China
- * E-mail:
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17
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Sun L, Zhang G, Lei T, Huang C, Song T, Si L. Two different HPV-11E6 fusion proteins trap p53 in the cytoplasm and induce apoptosis. Cancer Biol Ther 2014; 7:1909-15. [DOI: 10.4161/cbt.7.12.6941] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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18
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Yang Y, Li M, Chang S, Wang L, Song T, Gao L, Hu L, Li Z, Liu L, Yao J, Huang C. MicroRNA-195 acts as a tumor suppressor by directly targeting Wnt3a in HepG2 hepatocellular carcinoma cells. Mol Med Rep 2014; 10:2643-8. [PMID: 25174704 DOI: 10.3892/mmr.2014.2526] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Accepted: 07/01/2014] [Indexed: 11/05/2022] Open
Abstract
MicroRNAs (miRNAs) are a class of small, non‑coding, endogenous RNAs that are important in tumor cell biological processes as they regulate gene expression. miR-195 has been demonstrated to be a tumor repressor in numerous types of human cancer. However, the mechanism by which miR‑195 suppresses tumor development remains to be elucidated. The aim of this study was to investigate the effect of miR-195 on the biological functions of HepG2 hepatocellular carcinoma (HCC) cells and identify the association between miR-195 and Wnt3a in HCC. miR-195 mRNA expression levels in HCC tissues and cell lines were measured by reverse transcription polymerase chain reaction analysis. miR-195 function was measured with cell proliferation, cell cycle and apoptosis assays following transfection with miR‑195 and anti‑miR‑195 sequences, and the respective controls. Luciferase reporter assay was used to determine whether Wnt3a was a target of miR-195. In addition, Wnt3a expression levels were determined in HCC cells using western blot analysis. The miR-195 expression levels were found to be reduced in HCC tissues and cell lines. miR-195 overexpression resulted in a reduction in cell proliferation. In addition, the overexpression of miR-195 in HCC cells induced G1 phase cell cycle arrest and promoted apoptosis. Furthermore, Wnt3a was demonstrated to be directly targeted by miR-195. These findings suggest that miR-195 is key in regulating cell proliferation, cell cycle and apoptosis through targeting Wnt3a. In addition, overexpression of miR-195 may be a potential therapeutic strategy in the treatment of HCC.
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Affiliation(s)
- Yang Yang
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi 710061, P.R. China
| | - Menghe Li
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi 710061, P.R. China
| | - Su'e Chang
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi 710061, P.R. China
| | - Lumin Wang
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi 710061, P.R. China
| | - Tusheng Song
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi 710061, P.R. China
| | - Ling Gao
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi 710061, P.R. China
| | - Lili Hu
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi 710061, P.R. China
| | - Zongfang Li
- Engineering Research Center of Biotherapy and Translational Medicine of Shaanxi Province, Xi'an, Shaanxi 710061, P.R. China
| | - Liying Liu
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi 710061, P.R. China
| | - Jiayi Yao
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi 710061, P.R. China
| | - Chen Huang
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi 710061, P.R. China
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Hu L, Zhao X, Yang J, Wang L, Yang Y, Song T, Huang C. Chronic scream sound exposure alters memory and monoamine levels in female rat brain. Physiol Behav 2014; 137:53-9. [PMID: 24952268 DOI: 10.1016/j.physbeh.2014.06.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [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: 03/14/2014] [Revised: 06/04/2014] [Accepted: 06/12/2014] [Indexed: 10/25/2022]
Abstract
Chronic scream sound alters the cognitive performance of male rats and their brain monoamine levels, these stress-induced alterations are sexually dimorphic. To determine the effects of sound stress on female rats, we examined their serum corticosterone levels and their adrenal, splenic, and thymic weights, their cognitive performance and the levels of monoamine neurotransmitters and their metabolites in the brain. Adult female Sprague-Dawley rats, with and without exposure to scream sound (4h/day for 21 day) were tested for spatial learning and memory using a Morris water maze. Stress decreased serum corticosterone levels, as well as splenic and adrenal weight. It also impaired spatial memory but did not affect the learning ability. Monoamines and metabolites were measured in the prefrontal cortex (PFC), striatum, hypothalamus, and hippocampus. The dopamine (DA) levels in the PFC decreased but the homovanillic acid/DA ratio increased. The decreased DA and the increased 5-hydroxyindoleacetic acid (5-HIAA) levels were observed in the striatum. Only the 5-HIAA level increased in the hypothalamus. In the hippocampus, stress did not affect the levels of monoamines and metabolites. The results suggest that scream sound stress influences most physiologic parameters, memory, and the levels of monoamine neurotransmitter and their metabolites in female rats.
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Affiliation(s)
- Lili Hu
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi, China; Basic Medical College, Shanxi University of Traditional Chinese Medicine, Taiyuan, Shanxi, China
| | - Xiaoge Zhao
- Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi, China
| | - Juan Yang
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi, China
| | - Lumin Wang
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi, China
| | - Yang Yang
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi, China
| | - Tusheng Song
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi, China.
| | - Chen Huang
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi, China; Cardiovascular Research Center, Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi, China.
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Yang Y, Huang N, Gao L, Chang S, Guo B, Hu L, Song T, Huang C. [Construction of pcDNA3-HERG-G572R expression vector and establishment of a cell line stably expressing HKE-HERG-G572R]. Nan Fang Yi Ke Da Xue Xue Bao 2014; 34:308-311. [PMID: 24670439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
OBJECTIVE To construct the pcDNA3-HERG-G572R expression vector and establish a cell line stably expressing HKE-HERG-G572R. METHODS HERG-G572R mutant fragment was constructed by over-lap extension PCR and validated by DNA sequencing. The HKE-HERG-G572R expression vector was constructed and transfected into HEK293 cells to obtain a cell line stably expressing HKE-HERG-G572R. RESULTS The pcDNA3-HERG-G572R expression vector was successfully constructed and the cell line stably expressing HKE-HERG-G572R was established. Real-time PCR and Western blotting revealed a 632-fold HKE-HERG-G572R overexpression in the transfected HEK293 cells as compared with that in control HEK293 cells transfected with pcDNA3 (P<0.01). CONCLUSION The protocol can be used to construct the cell line stably expressing HKE-HERG-G572R to provide a cell model for studying individualized therapy.
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Affiliation(s)
- Yang Yang
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University College of Medicine, Xi'an 710061, China. E-mail:
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Yang J, Hu L, Wu Q, Liu L, Zhao L, Zhao X, Song T, Huang C. A terrified-sound stress induced proteomic changes in adult male rat hippocampus. Physiol Behav 2014; 128:32-8. [PMID: 24518870 DOI: 10.1016/j.physbeh.2014.01.038] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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: 12/14/2013] [Revised: 01/19/2014] [Accepted: 01/25/2014] [Indexed: 01/24/2023]
Abstract
In this study, we investigated the biochemical mechanisms in the adult rat hippocampus underlying the relationship between a terrified-sound induced psychological stress and spatial learning. Adult male rats were exposed to a terrified-sound stress, and the Morris water maze (MWM) has been used to evaluate changes in spatial learning and memory. The protein expression profile of the hippocampus was examined using two-dimensional gel electrophoresis (2DE), matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, and bioinformatics analysis. The data from the MWM tests suggested that a terrified-sound stress improved spatial learning. The proteomic analysis revealed that the expression of 52 proteins was down-regulated, while that of 35 proteins were up-regulated, in the hippocampus of the stressed rats. We identified and validated six of the most significant differentially expressed proteins that demonstrated the greatest stress-induced changes. Our study provides the first evidence that a terrified-sound stress improves spatial learning in rats, and that the enhanced spatial learning coincides with changes in protein expression in rat hippocampus.
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Affiliation(s)
- Juan Yang
- Department of Genetics and Molecular Biology, Medical School of Xi'an Jiaotong University, 76 Western Yanta Road, Xi'an, Shaanxi 710061, PR China; Key Laboratory of Environment and Disease-Related Gene, Ministry of Education, 76 Western Yanta Road, Xi'an, Shaanxi 710061, PR China
| | - Lili Hu
- Department of Genetics and Molecular Biology, Medical School of Xi'an Jiaotong University, 76 Western Yanta Road, Xi'an, Shaanxi 710061, PR China; Key Laboratory of Environment and Disease-Related Gene, Ministry of Education, 76 Western Yanta Road, Xi'an, Shaanxi 710061, PR China
| | - Qiuhua Wu
- Department of Genetics and Molecular Biology, Medical School of Xi'an Jiaotong University, 76 Western Yanta Road, Xi'an, Shaanxi 710061, PR China; Key Laboratory of Environment and Disease-Related Gene, Ministry of Education, 76 Western Yanta Road, Xi'an, Shaanxi 710061, PR China
| | - Liying Liu
- Department of Genetics and Molecular Biology, Medical School of Xi'an Jiaotong University, 76 Western Yanta Road, Xi'an, Shaanxi 710061, PR China; Key Laboratory of Environment and Disease-Related Gene, Ministry of Education, 76 Western Yanta Road, Xi'an, Shaanxi 710061, PR China
| | - Lingyu Zhao
- Department of Genetics and Molecular Biology, Medical School of Xi'an Jiaotong University, 76 Western Yanta Road, Xi'an, Shaanxi 710061, PR China; Key Laboratory of Environment and Disease-Related Gene, Ministry of Education, 76 Western Yanta Road, Xi'an, Shaanxi 710061, PR China
| | - Xiaoge Zhao
- Department of Genetics and Molecular Biology, Medical School of Xi'an Jiaotong University, 76 Western Yanta Road, Xi'an, Shaanxi 710061, PR China; Key Laboratory of Environment and Disease-Related Gene, Ministry of Education, 76 Western Yanta Road, Xi'an, Shaanxi 710061, PR China
| | - Tusheng Song
- Department of Genetics and Molecular Biology, Medical School of Xi'an Jiaotong University, 76 Western Yanta Road, Xi'an, Shaanxi 710061, PR China; Key Laboratory of Environment and Disease-Related Gene, Ministry of Education, 76 Western Yanta Road, Xi'an, Shaanxi 710061, PR China
| | - Chen Huang
- Department of Genetics and Molecular Biology, Medical School of Xi'an Jiaotong University, 76 Western Yanta Road, Xi'an, Shaanxi 710061, PR China; Key Laboratory of Environment and Disease-Related Gene, Ministry of Education, 76 Western Yanta Road, Xi'an, Shaanxi 710061, PR China.
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Guo B, Liu L, Yao J, Ma R, Chang D, Li Z, Song T, Huang C. miR-338-3p suppresses gastric cancer progression through a PTEN-AKT axis by targeting P-REX2a. Mol Cancer Res 2013; 12:313-21. [PMID: 24375644 DOI: 10.1158/1541-7786.mcr-13-0507] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
UNLABELLED Results from recent studies suggest that aberrant microRNA expression is common in numerous cancers. Although miR-338-3p has been implicated in hepatocellular carcinoma, its role in gastric cancer is unknown. To this end, we report that miR-338-3p is downregulated in both gastric cancer tissue and cell lines. Forced expression of miR-338-3p inhibited cell proliferation and clonogenicity and induced a G1-S arrest as well as apoptosis in gastric cancer cells. Furthermore, P-Rex2a (PREX2) was identified as a direct target of miR-338-3p, and silencing P-Rex2a resulted in the same biologic effects of miR-338-3p expression in gastric cancer cells. Furthermore, both enforced expression of miR-338-3p or silencing of P-Rex2a resulted in activation of PTEN, leading to a decline in AKT phosphorylation. Also, miR-338-3p markedly inhibited the in vivo tumorigenicity in a nude mouse xenograft model system. These results demonstrate that miR-338-3p affects gastric cancer progression through PTEN-AKT signaling by targeting P-Rex2a in gastric cancer cells, which posits miR-338-3p as a novel strategy for gastric cancer treatment. IMPLICATIONS miR-338-3p acts as a novel tumor suppressor that blocks the growth of gastric cancer cells through PTEN-PI3K signaling by targeting P-Rex2a.
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Affiliation(s)
- Bo Guo
- Xi'an Jiaotong University College of Medicine, Yanta Western Road 76, Xi'an 710061, China.
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Wang L, Yao J, Zhang X, Guo B, Le X, Cubberly M, Li Z, Nan K, Song T, Huang C. miRNA-302b suppresses human hepatocellular carcinoma by targeting AKT2. Mol Cancer Res 2013; 12:190-202. [PMID: 24337067 DOI: 10.1158/1541-7786.mcr-13-0411] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
UNLABELLED miRNAs (miR) play a critical role in human cancers, including hepatocellular carcinoma. Although miR-302b has been suggested to function as a tumor repressor in other cancers, its role in hepatocellular carcinoma is unknown. This study investigated the expression and functional role of miR-302b in human hepatocellular carcinoma. The expression level of miR-302b is dramatically decreased in clinical hepatocellular carcinoma specimens, as compared with their respective nonneoplastic counterparts, and in hepatocellular carcinoma cell lines. Overexpression of miR-302b suppressed hepatocellular carcinoma cell proliferation and G1-S transition in vitro, whereas inhibition of miR-302b promoted hepatocellular carcinoma cell proliferation and G1-S transition. Using a luciferase reporter assay, AKT2 was determined to be a direct target of miR-302b. Subsequent investigation revealed that miR-302b expression was inversely correlated with AKT2 expression in hepatocellular carcinoma tissue samples. Importantly, silencing AKT2 recapitulated the cellular and molecular effects seen upon miR-302b overexpression, which included inhibiting hepatocellular carcinoma cell proliferation, suppressing G1 regulators (Cyclin A, Cyclin D1, CDK2) and increasing p27Kip1 phosphorylation at Ser10. Restoration of AKT2 counteracted the effects of miR-302b expression. Moreover, miR-302b was able to repress tumor growth of hepatocellular carcinoma cells in vivo. IMPLICATIONS Taken together, miR-302b inhibits HCC cell proliferation and growth in vitro and in vivo by targeting AKT2.
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Affiliation(s)
- Lumin Wang
- Department of Genetics and Molecular Biology, Xi'an Jiaotong, University School of Medicine, 76 Yan Ta West Road, Xi'an, Shaanxi 710061, China.
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Zhao LY, Zhang J, Guo B, Yang J, Han J, Zhao XG, Wang XF, Liu LY, Li ZF, Song TS, Huang C. MECP2 promotes cell proliferation by activating ERK1/2 and inhibiting p38 activity in human hepatocellular carcinoma HEPG2 cells. Cell Mol Biol (Noisy-le-grand) 2013; Suppl 59:OL1876-OL1881. [PMID: 24199952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Accepted: 10/16/2013] [Indexed: 06/02/2023]
Abstract
Hepatocellular carcinoma (HCC) is the third leading cause of cancer-related death worldwide and currently represents the leading cause of death amongst cirrhotic patients, but the mechanisms remain unknown. In this experiment, we investigated the expression of Methyl CpG-binding protein 2 (MeCP2) in HCC, the effect of MeCP2 on the proliferation of human HCC HepG2 cells, and the activation of mitogen-activated protein kinases (MAPKs) signaling pathways. The results showed that MeCP2 expression levels was higher in human HCC tissue than normal hepatocellular tissue, and MeCP2 siRNA reduced the proliferation of HCC HepG2 cells by decreasing cell activity and cell division in vitro. After MeCP2 siRNA treatment, the proportion of G1/G0 phase cells increased, but the proportion of S and G2/M phase cells decreased, indicative of G1/G0 cell cycle arrest. Furthermore, the proportions of early and late apoptosis in HCC HepG2 cells were enhanced after MeCP2 siRNA treatment. It was also found that activation of extracellular signal-regulated protein kinase (ERK) and p38 signaling pathways were involved in the proliferation of HepG2 cells. After MeCP2 siRNA treatment, p-ERK1/2 levels decreased, but p-p38 levels increased. Our findings demonstrated that MeCP2 promoted the proliferation of human HCC HepG2 cells with activation of ERK1/2 signaling pathways, suggesting a novel mechanism for pharmacological study of treatment for human HCC.
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Affiliation(s)
- L Y Zhao
- Xi'an Jiaotong University College of Medicine Department of Genetics and Molecular Biology, Environment and Genes Related to Diseases Key Laboratory of Education Ministry Shaanxi China
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Wang L, Yao J, Shi X, Hu L, Li Z, Song T, Huang C. MicroRNA-302b suppresses cell proliferation by targeting EGFR in human hepatocellular carcinoma SMMC-7721 cells. BMC Cancer 2013; 13:448. [PMID: 24083596 PMCID: PMC3850949 DOI: 10.1186/1471-2407-13-448] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Accepted: 09/26/2013] [Indexed: 01/01/2023] Open
Abstract
Background MicroRNAs are regulators that can play an essential role in tumorigenesis. Although miR-302 families have been suggested to be tumor repressors in human cancer, the mechanism by which they suppress tumor development remains to be defined. In this study, we discover that miR302b suppresses tumor proliferation may due to directly targeting EGFR in human hepatocellular carcinoma (HCC). Methods QRT-PCR was used to assess miR-302b and EGFR expression in 27 pairs of clinical hepatocellular carcinoma tissues and their corresponding adjacent nontumorous liver tissues. MTT, colony formation, immunofluorescence staining, and cell cycle assays were used to examine the tumor suppressor role of miR302b in cell proliferation. Luciferase assays were performed to assess the EGFR was a novel target of miR-302b. Western blot assay was used to validate the protein expression level. Results We demonstrated that miR-302b was frequently down-regulated, whereas EGFR was up-regulated in 27 pairs of clinical HCC and non-tumorous counterparts. The dual-luciferase reporter assays revealed that EGFR was a novel target of miR-302b. Re-expression of miR-302b resulted in the inhibition of proliferation in hepatocellular carcinoma SMMC-7721 cells. The silencing of EGFR by miR-302b or siEGFR led to down-regulation of proliferation-related proteins, such as AKT2, CCND1, and CDK2. Conclusion miR-302b suppresses HCC growth may due to targeting the EGFR/AKT2/CCND1 pathway.
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Affiliation(s)
- Lumin Wang
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University Health Science Center, No,76 West Yanta Road, Xi'an, Shaanxi 710061, P,R, China.
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Hu L, Yang J, Song T, Hou N, Liu Y, Zhao X, Zhang D, Wang L, Wang T, Huang C. A new stress model, a scream sound, alters learning and monoamine levels in rat brain. Physiol Behav 2013; 123:105-13. [PMID: 24096192 DOI: 10.1016/j.physbeh.2013.09.010] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [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: 04/19/2013] [Revised: 08/25/2013] [Accepted: 09/23/2013] [Indexed: 01/20/2023]
Abstract
Most existing animal models for stress involve the simultaneous application of physical and psychological stress factors. In the current study, we described and used a novel psychological stress model (scream sound stress). To study the validity of it, we carried out acute and chronic scream sound stress. First, adult Sprague-Dawley (SD) rats were randomly divided into white noise, stress and background groups. The white noise group and stress group were treated with white noise and scream sound for 4h in the morning respectively. Compared with white noise and background groups, exposure to acute scream sound increased corticosterone (CORT) level and decreased latency in Morris water maze (MWM) test. The levels of noradrenaline (NE), dopamine (DA), 5-hydroxytryptamine (5-HT), 3,4-dihydroxyphenylacetic acid (DOPAC), homovanillic acid (HVA) and 5-hydroxyindoleacetic acid (5-HIAA) were altered in the striatum, hypothalamus and hippocampus of stress rats. Second, adult SD rats were randomly divided into background and stress groups, which were treated with scream sound for three weeks. Exposure to chronic scream sound suppressed body weight gain, increased corticosterone (CORT) level, influenced the morphology of adrenal gland, improved spleen and thymus indices, and decreased latency in MWM test. NE, DA, DOPAC, HVA and 5-HIAA levels were also altered in the brain of stress rats. Our results suggested that scream sound, as a novel stressor, facilitated learning ability, as well as altered monoamine levels in the rat brain. Moreover, scream sound is easy to apply and can be applied in more animals at the same time.
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Affiliation(s)
- Lili Hu
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi, China
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Guo B, Li J, Liu L, Hou N, Chang D, Zhao L, Li Z, Song T, Huang C. Dysregulation of miRNAs and their potential as biomarkers for the diagnosis of gastric cancer. Biomed Rep 2013; 1:907-912. [PMID: 24649051 DOI: 10.3892/br.2013.175] [Citation(s) in RCA: 16] [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: 08/09/2013] [Accepted: 09/18/2013] [Indexed: 12/15/2022] Open
Abstract
Recent studies demonstrated that microRNA (miRNA) expression is dysregulated in numerous human cancers. In this study, we investigated the expression patterns of 8 miRNAs in gastric cancer and evaluated their clinical significance in order to identify potential biomarkers for gastric cancer diagnosis. Total RNA was extracted from gastric cancer and normal tissues from 20 pairs of paraffin-embedded specimens. The expression levels of the miRNAs were detected by quantitative reverse transcriptase polymerase chain reaction using specific stem-loop primers, with U6 as the internal reference gene. The association between miRNA expression level and clinicopathological factors was investigated. The expression of miR-21, -103, -106a, -221 and -222 in gastric cancer samples was significantly higher compared to that in the paired normal samples. Conversely, the expression of miR-143 and -195 in cancer tissues was significantly lower compared to that in normal tissues. However, miR-126 exhibited no difference between gastric cancer and normal tissues. A multivariate analysis demonstrated that the expression of miR-143 and -195 were associated with clinicopathological parameters, including depth of invasion and lymph node metastasis. This association may be applicable to future decisions regarding treatment or as a diagnostic biomarker.
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Affiliation(s)
- Bo Guo
- Department of Genetics and Molecular Biology, Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Medical College, Xi'an Jiaotong University, Xi'an, P.R. China
| | - Jie Li
- The Second Affiliated Hospital of Shaanxi University of Traditional Chinese Medicine, Xianyang, P.R. China
| | - Liying Liu
- Department of Genetics and Molecular Biology, Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Medical College, Xi'an Jiaotong University, Xi'an, P.R. China
| | - Ni Hou
- Department of Genetics and Molecular Biology, Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Medical College, Xi'an Jiaotong University, Xi'an, P.R. China
| | - Dongmin Chang
- Department of Tumor Surgery, The First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, Shaanxi, P.R. China
| | - Lingyu Zhao
- Department of Genetics and Molecular Biology, Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Medical College, Xi'an Jiaotong University, Xi'an, P.R. China
| | - Zongfang Li
- Engineering Research Center of Biotherapy and Translational Medicine of Shaanxi, Xi'an, Shaanxi, P.R. China
| | - Tusheng Song
- Department of Genetics and Molecular Biology, Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Medical College, Xi'an Jiaotong University, Xi'an, P.R. China
| | - Chen Huang
- Department of Genetics and Molecular Biology, Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Medical College, Xi'an Jiaotong University, Xi'an, P.R. China ; Cardiovascular Research Center, Medical College, Xi'an Jiaotong University, Xi'an, Shaanxi, P.R. China
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Hou N, Zhang X, Zhao L, Zhao X, Li Z, Song T, Huang C. A novel chronic stress-induced shift in the Th1 to Th2 response promotes colon cancer growth. Biochem Biophys Res Commun 2013; 439:471-6. [PMID: 24036270 DOI: 10.1016/j.bbrc.2013.08.101] [Citation(s) in RCA: 53] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Accepted: 08/30/2013] [Indexed: 12/14/2022]
Abstract
Epidemiological data have shown that stress and other psychological factors might influence cancer onset and progression. However, to date, the mechanisms are not well understood. In the present study, we used chronic exposure to a scream as a novel form of sound stress to explore the influence of the chronic stress burden on colon cancer progression, and changes in the immune system were observed. Chronic exposure to scream sound stress induced freezing behavior in the mice and decreased the bodyweight gain. It also caused changes in the adrenal gland and increased serum corticosterone and norepinephrine levels. Cytokine microarray analysis showed changes in the levels of Th1 and Th2 cytokines. The chronic scream sound stress caused a shift from the Th1 to the Th2 response both in the circulation and in tumor-infiltrated lymphocytes, and it promoted colon cancer progression significantly. Taken together, chronic scream sound stress can be conveniently used as a novel chronic stress model. Chronic stress contributes to colon cancer progression and induces a Th1/Th2 imbalance in the mouse immune system, which is considered critical during cancer progression.
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Affiliation(s)
- Ni Hou
- Department of Genetics and Molecular Biology, Xi'an Jiaotong University School of Medicine, Xi'an, Shaanxi, China
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Zhang P, Liu Y, Li J, Kang Q, Tian Y, Chen X, Shi Q, Song T. Cell proliferation in ependymal/subventricular zone and nNOS expression following focal cerebral ischemia in adult rats. Neurol Res 2013; 28:91-6. [PMID: 16464370 DOI: 10.1179/016164106x91942] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Neuronal nitric oxide synthase (nNOS) regulates neurogenesis in normal developing brain, but the role of nNOS in neurogenesis in the ischemic brain remains unclear. To investigate the temporal and spatial relationship between cell proliferation of the ependymal/subventricular zone (SVZ), a principal neuroproliferative region in the adult brain, and nNOS expression, the male Sprague-Dawley rats weighing 250-350 g were used. The focal cerebral ischemia was induced by middle cerebral artery occlusion (MCAO). 10 microl of 0.2% fluorescence dye DiI was injected into the right lateral ventricle to prelabel ependymal/subventricular zone cells before ischemia. The rats were killed immediately after ischemia and days 1, 3, 7, 11, 14, 21 and 28 after ischemia. DiI-labeled cell counting was employed to assess cell proliferation. Immunohistochemistry and grayscale analysis were performed to determine nNOS localization and its quantity in the specific regions. Compared with control, the density of DiI-labeled cells in the ipsilateral ependyma/SVZ was significantly higher at days 1, 3, 7 and 11 after ischemia, whereas the quantity of nNOS expression in the ependyma/SVZ adjacent regions was significantly lower at the above time points. Additionally, nNOS positive cells were largely excluded from SVZ, and their long processes did not enter the ependyma/SVZ. Our results indicate that after focal cerebral ischemia, decreased nNOS expression in the ipsilateral ependymal/SVZ adjacent regions might be related to cell proliferation in the ependymal/SVZ.
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Affiliation(s)
- Pengbo Zhang
- Research Center for Neuroscience, Environment and Genes Related to Diseases Key Laboratory of Education Ministry, School of Medicine, Xi'an Jiaotong University, China
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Gao L, Ren W, Chang S, Guo B, Huang S, Li M, Guo Y, Li Z, Song T, Zhi K, Huang C. Downregulation of miR-145 expression in oral squamous cell carcinomas and its clinical significance. ACTA ACUST UNITED AC 2013; 36:194-9. [PMID: 23548968 DOI: 10.1159/000349956] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND MicroRNAs have been reported to play roles as oncogenes or tumor suppressor genes in human cancers. However, the expression levels of miR-145 in oral squamous cell carcinoma (OSCC) are unclear. The purpose of this study was to investigate the status of miR-145 expression in OSCC and determine its clinical significance. PATIENTS AND METHODS We examined miR-145 levels in 62 OSCC tissue samples and cell lines by quantitative real-time reverse transcription polymerase chain reaction (qRT-PCR). The relationship between miR-145 expression and clinicopathologic factors of OSCC patients was analyzed. RESULTS The proportion of miR-145 low expression was 82.26% (51/62) among the 62 OSCC patients, and expression levels of miR-145 in OSCC tissue samples and cell lines were significantly lower than in non-tumor controls. miR-145 expression levels were not significantly associated with age (p = 0.607), sex (p = 0.213), location (p = 0.952), histology (p = 0.603), pT stage (p = 0.305), pTNM stage (p = 0.471), and lymphatic metastasis (p = 1.000). CONCLUSION miR-145 may be involved in the early tumorigenesis of oral squamous cells, and might be a potential biomarker in the early diagnosis of OSCC.
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Affiliation(s)
- Ling Gao
- Department of Oral Maxillofacial Surgery, Stomatological Hospital, College of Medicine, Xi'an, Shaanxi, P.R. China
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Davies JCD, Sheridan HS, Lee PSL, Song TS, Stone AS, Ratjen FR. S121 Lung Clearance Index to Evaluate the Effect of Ivacaftor on Lung Function in Subjects with CF Who Have the G551D-CFTR Mutation and Mild Lung Disease. Thorax 2012. [DOI: 10.1136/thoraxjnl-2012-202678.126] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Zhao LY, Jiao Q, Xu X, Yang PB, Song TS, Huang C, Zhang JF, Liu Y. The decreased self-renewal potential of NPCs during human embryonic brain development with reduced activity of MAPKs. Cell Mol Biol (Noisy-le-grand) 2012; 58 Suppl:OL1730-OL1736. [PMID: 22863401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2012] [Accepted: 07/15/2012] [Indexed: 06/01/2023]
Abstract
Study of neural progenitor cells (NPCs) is important for treatment of degerative diseases in central nervous system. One of the key questions in NPCs transplantation therapy is about the understanding of which stage of the NPCs in brain development is ideal. Herein we investigated survival, proliferation and apoptosis of NPCs from 12 w, 16 w and 20 w human embryonic brain, meanwhile, the phosphorylation of mitogen-activated protein kinases (MAPKs) signaling were analyzed. The results showed that the survival, proliferation and cell division of 16 w and 20 w human NPCs significantly decreased comparing with 12 w human NPCs in vitro; and the NPCs apoptosis remarkably increased. Phosphorylation of ERK1/2 of 16 w and 20 w NPCs significantly decreased comparing with 12 w human NPCs, however phosphorylation of p38 MAPK increased. NPCs proliferation increase when ERK1/2 signaling is activated by PMA. The results demonstrated that self-renewal potential of NPCs decreased in culture during human embryonic brain development, the activity of ERK signaling pathway were decreased, and suggest NPCs from 12-week fetuses might be better donor for cell transplantation during the period of 12-20 weeks because of their advantage on survival and proliferation.
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Affiliation(s)
- L Y Zhao
- Institute of Neurobiology, Environment and Genes Related to Diseases Key Laboratory of Education Ministry, Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi, 710061, PR China
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Hu J, Dang N, Song T, Vanderkerken K. Mcl-1 reduction due to caspase-dependent cleavage during endoplasmic reticulum stress-induced apoptosis. J Biol Chem 2012; 286:le24. [PMID: 22039274 DOI: 10.1074/jbc.l111.233502] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Affiliation(s)
- Jinsong Hu
- Department of Hematology and Immunology, Myeloma Center Brussels, Belgium; Department of Genetics and Molecular Biology, Medical School of Xi'an Jiaotong University, Xi'an, China.
| | - Nana Dang
- Department of Physiology and Immunology, Vrije Universiteit Brussel, Brussels, Belgium
| | - Tusheng Song
- Department of Genetics and Molecular Biology, Medical School of Xi'an Jiaotong University, Xi'an, China
| | - Karin Vanderkerken
- Department of Hematology and Immunology, Myeloma Center Brussels, Belgium
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Liu LY, Huang C, Li ZF, Wang AY, Hu XY, Ni L, Yu L, Song TS. [STAT1 and STAT2 participate in growth inhibition of human hepatoma HepG2 cells induced by phosphatidylethanolamine]. Nan Fang Yi Ke Da Xue Xue Bao 2011; 31:256-258. [PMID: 21354905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
OBJECTIVE To investigate the roles of STAT1 and STAT2 in growth inhibition induced by phosphatidylethanolamine (PE) in human hepatoma HepG2 cells. METHODS The growth of HepG2 cells exposed to 0.125, 0.25, 0.5 and 1.0 mmol/L PE was assessed by MTT assay, and the expressions of STAT1 and STAT2 were analyzed using immunocytochemical assay. RESULTS PE inhibited the growth of HepG2 cells in a dose-dependent manner and increased the expression of STAT1 and STAT2 in comparison with those in the control group. AG490, an inhibitor of JAKs, partially reversed PE-induced growth inhibition of HepG2 cells. CONCLUSION STAT1 and STAT2 are involved in the growth inhibition of human hepatoma HepG2 cells induced by PE.
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Affiliation(s)
- Li-ying Liu
- Xi an Jiaotong University College of Medicine, Xi an 710061, China
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Zhao LY, Huang C, Li ZF, Liu L, Ni L, Song TS. STAT1/2 is involved in the inhibition of cell growth induced by U0126 in HeLa cells. Cell Mol Biol (Noisy-le-grand) 2009; 55 Suppl:OL1168-OL1174. [PMID: 20003811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2009] [Accepted: 10/01/2009] [Indexed: 05/28/2023]
Abstract
The mitogen-activated protein kinase (MAPK) signaling cascade plays an important role in cell life. Herein we show that small interfering RNAs targeting MAPK1 can inhibit HeLa cell growth and induce apoptosis along with up-regulation of signal transducers and activator 1 and 2 (STAT1/2). However, across-talk between the ras-raf-ERK1/2 signalling cascade and the JAK-STAT pathway remain largely unknown. Using MEK inhibitor U0126 and JAK-2 inhibitor AG490, we analyzed the relationship between ERK1/2 and STAT1/2 in HeLa cells. U0126 inhibited HeLa cell growth, arrested the cell cycle at G1/G0, and induced cell apoptosis, and AG490 partially reversed the effects of U0126. U0126 induced up-regulation of ERK1/2 and down-regulation of phosphorylated ERK1/2, increased STAT1 and STAT2 expression in a dose-dependent manner, and activated STAT1/2 via their phosphorylation. AG490 markedly inhibited the phosphorylation of STAT1 and STAT2 and slightly increased that of ERK1/2 inhibited by U0126. We suggest that STAT1/2 is involved in the inhibition of cell growth induced by U0126 in HeLa cells.
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Affiliation(s)
- L Y Zhao
- Department of Genetics and Molecular Biology, Medical School, Xi'an Jiaotong University/Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Shaanxi, PR China
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Zhang G, Sun L, Li Z, Si L, Song T, Huang C, Zhang W. HPV-16E6 can induce multiple site phosphorylation of p53. Oncol Rep 2009; 21:371-377. [PMID: 19148510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
Abstract
Modulation of the activity of tumor suppressor p53 is a key event in the replication of many viruses. They could manipulate p53 function through modification of phosphorylation for their own purpose. However, there are scarce data on the relationship between high risk human papillomavirus (HPV) E6 protein and p53 phosphorylation status. Therefore, we used a mammalian green fluorescence protein (GFP) expression system to express HPV-16E6 with GFP fusion proteins in wild-type p53 cell lines, 293T, MCF-7, and SMMC-7721 to trace the traffic and subcellular location of E6 protein. By immunoblotting, we determined the positive phosphorylated sites of p53 in the context of HPV-16E6. Using immunofluorescence techniques, we observed the distribution of phosphorylated p53 in all the cells we used. In conclusion, HPV-16E6 was predominantly located in nuclei of wild-type p53 cells, and it was able to induce phosphorylation of p53 at multiple sites, such as Ser15, Ser20, and Ser392. The level and time of these phosphorylated sites of p53 were different in HPV-16E6 expressing cells. Furthermore, the phosphorylated p53 was localized in the nuclei together with HPV-16E6.
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Affiliation(s)
- Ge Zhang
- The Secondary Affiliated Hospital of School of Medicine, Xi'an, People's Republic of China
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37
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Sun L, Zhang G, Li Z, Song T, Huang C, Si L. In GFP with high risk HPV-18E6 fusion protein expressed 293T and MCF-7 cells, the endogenous wild-type p53 could be transiently phosphorylated at multiple sites. J Exp Clin Cancer Res 2008; 27:35. [PMID: 18778462 PMCID: PMC2546361 DOI: 10.1186/1756-9966-27-35] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2008] [Accepted: 09/08/2008] [Indexed: 11/13/2022] Open
Abstract
Background Infected cells recognize viral replication as a DNA damage stress and elicit the host surveillance mechanism to anti-virus infection. Modulation of the activity of tumor suppressor p53 is a key event in the replication of many viruses. They could manipulate p53 function through phosphorylation modification for their own purpose. But there is rarely research about p53 phosphorylation status in the context of HPV-E6. Therefore, we investigated whether p53 could be phosphorylated by HPV-E6. Methods We used a mammalian green fluorescence protein (GFP) expression system to express HPV-18E6 with GFP fusion proteins (GFP-18E6) in wild-type (wt) p53 cell lines, such as 293T and MCF-7 cells to trace the traffic and subcellular location of E6 protein. By immunofluorescence technique and immunoblotting, we determined the positive phosphorylated sites of p53 and observed the distribution of phosphorylated p53 in the context of GFP-18E6. Results GFP-18E6 was predominantly located in nuclei of wt p53 cell lines, and it could induce transient phosphorylation of p53 at multiple sites, such as Ser15, Ser20, and Ser392. All the three sites of phosphorylated p53s were localized in nuclei together with GFP-18E6. Conclusion In GFP with high risk HPV-18E6 fusion protein expressed 293T and MCF-7 cells, the endogenous wt p53 could be transiently phosphorylated at multiple sites.
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Affiliation(s)
- Lina Sun
- Key Laboratory of Environment and Genes Related to Diseases of the Education Ministry, School of Medicine, Xi an Jiaotong University, Xi an, PR China.
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Jeong KK, Song TS, Kim YN, Choi WH, Kim SK, Keum KC, Seong JS. SU-GG-T-78: Feasibility of Helical Tomotherapy On a Wide Superficial Area Treatment. Med Phys 2008. [DOI: 10.1118/1.2961830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Lu H, Li M, Song T, Qian Y, Xiao X, Chen X, Zhang P, Feng X, Parker T, Liu Y. Retrovirus delivered neurotrophin-3 promotes survival, proliferation and neuronal differentiation of human fetal neural stem cells in vitro. Brain Res Bull 2008; 77:158-64. [PMID: 19875351 DOI: 10.1016/j.brainresbull.2008.02.037] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2007] [Revised: 02/10/2008] [Accepted: 02/18/2008] [Indexed: 12/21/2022]
Abstract
Poor survival and insufficient neuronal differentiation are the main obstacles to neural stem cell (NSC) transplantation therapy. Genetic modification of NSCs with neurotrophins is considered a promising approach to overcome these difficulties. In this study, the effects on survival, proliferation and neuronal differentiation of human fetal NSCs (hfNSCs) were observed after infection by a neurotrophin-3 (NT-3) recombinant retrovirus. The hfNSCs, from 12-week human fetal brains formed neurospheres, expressed the stem cell marker nestin and differentiated into the three main cell types of the nervous system. NT-3 recombinant retrovirus (Retro-NT-3) infected hfNSCs efficiently expressed NT-3 gene for at least 8 weeks, presented an accelerated proliferation, and therefore produced an increased number of neurospheres and after differentiation in vitro, contained a higher percentage of neuronal cells. Eight weeks after infection, 37.9+/-4.2% of hfNSCs in the Retro-NT-3 infection group expressed the neuronal marker, this was significantly higher than the control and mock infection groups. NT-3 transduced hfNSCs also displayed longer protruding neurites compared with other groups. Combined these results demonstrate that NT-3 modification promote the survival/proliferation, neuronal differentiation and growth of neurites of hfNSCs in vitro. This study proposes recombinant retrovirus mediated NT-3 modification may provide a promising means to resolve the poor survival and insufficient neuronal differentiation of NSCs.
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Affiliation(s)
- Haixia Lu
- Institute of Neurobiology, School of Medicine, Xi'an Jiaotong University, Xi'an 710061, China.
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Huang C, Yao JY, Li ZF, Liu LY, Ni L, Song TS. [Small interfering RNA-mediated nuclear factor-kappaB P65 suppression induces apoptosis of hepatic carcinoma SMMC-7721 cells]. Nan Fang Yi Ke Da Xue Xue Bao 2007; 27:1841-1844. [PMID: 18158998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
OBJECTIVE To study the mechanism of hepatic carcinoma cell apoptosis induced by small interfering RNA (siRNA)-mediated nuclear factor-kappaB (NF-kappaB) P65 silencing. METHODS Hepatic carcinoma SMMC-7721 cells were exposed to liposome-mediated transfection with NF-kappaB P65 siRNA synthesized by in vitro transcription, and the cells with empty liposome transfection and those without particular treatment served as the control groups. The expression of NF-kappaB P65 in the cells was detected by Western blotting, the cell viability examined by MTT assay, and the cell apoptosis assessed by flow cytometry. Immunohistochemistry was used to examine the expressions of Bcl-2 and Bax. RESULTS siRNA transfection significantly inhibited the expression of NF-kappaB P65 in SMMC-7721cells, with inhibition rates of 64.74% compared with the untreated cells and of 34.52% compared with the liposome-treated cells. The siRNA-treated SMMC-7721 cells also exhibited significant decrease in cell proliferation by 33.39% and 27.23% in comparison with the untreated and liposome-treated cells, respectively. NF-kappaB P65 siRNA induced obvious cell apoptosis with down-regulated Bcl-2 and up-regulated Bax expressions. CONCLUSION NF-kappaB p65 siRNA can induce SMMC-7721 cell apoptosis via the Bcl-2/Bax pathway.
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Affiliation(s)
- Chen Huang
- Key Laboratory of Environment and Genes Related to Diseases of Ministry of Education, Xi'an Jiaotong University College of Medicine, Xi'an 710061, China
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Zhang P, Liu Y, Li J, Kang Q, Tian Y, Chen X, Zhao J, Shi Q, Song T. Decreased neuronal nitric oxide synthase expression and cell migration in the peri-infarction after focal cerebral ischemia in rats. Neuropathology 2007; 27:347-54. [PMID: 17899688 DOI: 10.1111/j.1440-1789.2007.00791.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Neuronal nitric oxide synthase (nNOS) regulates neurogenesis in the normal developing brain, but the role of nNOS in neurogenesis of the adult ischemic brain remains unclear. The aim of this study was to investigate the temporal and spatial relationship between cell migration from the ependymal/subventricular zone (SVZ) to periinfarction and nNOS expression in the rat. Ependymal/subventricular zone cells were prelabeled with fluorescence dye DiI. Focal cerebral ischemia was induced by occlusion of the left middle cerebral artery. At 1, 3, 7, 14 and 21 days after ischemia, the rats were killed in order to determine the number of migrating cells, the colocalization of DiI and nNOS as well as nNOS quantity in specific regions. Compared to non-ischemic control and 1 day post-ischemia, the number of DiI-labeled cells in the selected regions increased at 3 days and peaked 14 days following ischemia. During 3-7 days post-ischemia, none of the migrating cells expressed nNOS and decreased nNOS expression was observed in the regions where migrating cells passed through. These results suggest the possible association between ependymal/SVZ cell migration and decreased nNOS expression within the areas including the migrating routes towards the peri-infarction.
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Affiliation(s)
- Pengbo Zhang
- Institute of Neurobiology, Environment and Genes Related to Diseases, Key Laboratory of Education Ministry, Xi'an Jiaotong University School of Medicine, Shanxi, China
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Meng XY, Huang C, Song TS. [Genetic analysis of the familial noncompaction ventricular myocardium with sick sinus syndrome]. Zhonghua Xin Xue Guan Bing Za Zhi 2007; 35:580-1. [PMID: 17711726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
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Huang C, Yang L, Li Z, Yang J, Zhao J, Dehui X, Liu L, Wang Q, Song T. Detection of CCND1 amplification using laser capture microdissection coupled with real-time polymerase chain reaction in human esophageal squamous cell carcinoma. ACTA ACUST UNITED AC 2007; 175:19-25. [PMID: 17498553 DOI: 10.1016/j.cancergencyto.2007.01.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2005] [Revised: 11/20/2006] [Accepted: 12/19/2006] [Indexed: 02/07/2023]
Abstract
Several methods have been used to detect CCND1 amplification or overexpression in esophageal squamous cell carcinoma (ESCC), but problems remain, associated with heterogeneity of tumor tissue and quantification of gene copies. Laser capture microdissection coupled with real-time polymerase chain reaction (PCR) is a reliable method for the molecular analysis of gene profiles in specific tissues. All 35 specimens of ESCC studied were paraffin-embedded, cut into tissue slides, and stained by hematoxylin-eosin. The pure ESCC cell and normal squamous epithelia populations were separated by LCM and then genomic DNA was extracted from the dissected cells. CCND1 amplification was detected with real-time FQ-PCR and with PCR. Amplification was calculated by the formula X = 2(-DeltaDeltaCt) and R = (CCND1/ACTB) CANCER/(CCND1/ACTB) NORMAL. Twenty (57%) of primary ESCC cancer cell groups had a detectable CCND1 amplification (range, 2.06-fold to 25.9-fold) with real-time FQ-PCR, but only 2 of 15 primary ESCC cancer cell groups had detectable CCND1 amplification by PCR. CCND1 amplification was not correlated with age, sex, size of tumor, histological grade, and lymph node metastasis. In conclusion, LCM coupled with real-time fluorescence quantitative-PCR technique is more precise than PCR for the identifying amplified oncogenes; The role of CCND1 amplification in ESCC development and progression needs more extensive study.
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Affiliation(s)
- Chen Huang
- Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education, Xi'an, Shaanxi, People's Republic of China
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Kang QY, Liu Y, Chen XL, Zhao JJ, Zhang PB, Li J, Luo Y, Qian YH, Song TS. [A comparison study for differentiation between human fetal retinal progenitor cells and brain neural stem cells in vitro]. Zhonghua Yan Ke Za Zhi 2006; 42:901-7. [PMID: 17217784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
OBJECTIVE Investigating the potential of differentiation of human fetal retinal progenitor cells (hRPCs) and brain neural stem cells (hBNSCs) in vitro. METHODS hRPCs and hBNSCs were isolated from human fetuses (8-12 weeks of gestation) and cultured in serum-free DMEM/F12 culture medium with N2 supplement, epidermal growth factor (EGF) and basic fibroblast growth factor (bFGF) or culture medium with 10% fetal bovine serum (FBS) but without EGF and bFGF. Immunocytochemical and immunofluorescence studies were conducted for identification of neural stem cells, retinal progenitors or the subtypes of neurons, astrocytes, retinal ganglion cells and rod photoreceptors with the specific antibodies for Nestin, Pax6, Map2, GFAP, Thy-1 and Rhodopsin, respectively. RESULTS Both hRPCs and hBNSCs could proliferate and differentiate in DMEM/F12 + N2 with or without 10% FBS and expressed specific markers of immature neuroepithelial cells, retinal progenitors, mature neurons, astrocytes, retinal ganglion cells and rod photoreceptors. hBNSCs easily attached, spread out longer neurites and to form a network when cultured with serum contained medium. hRPCs were more difficult to attach and had only short dendrites. CONCLUSIONS Both hRPCs and hBNSCs can differentiate into retinal specific cell types in vitro. The adherent, migration and differential capacity of hRPCs and hBNSCs are different when these cells are induced by the serum-contained culture medium.
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Affiliation(s)
- Qian-yan Kang
- Department of Ophthalmology, The First Affiliated Hospital, Xi'an Jiaotong University School of Medicine, Xi'an 710061, China
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Huang C, Liu LY, Song TS, Ni L, Song LP, Hu JS, Zhao XG, Si LS. [Inhibition of the expression of p42MAPK in HeLa cell line by RNA interference]. Zhonghua Bing Li Xue Za Zhi 2006; 35:292-5. [PMID: 16777002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
OBJECTIVE To screen for siRNAs that inhibit the expression of p42(MAPK) in HeLa cell line. METHODS Three p42(MAPK) siRNAs and one random siRNA were synthesized using Silencer siRNA Construction Kit, and labeled with Cy-3 for measurement of transfection effect. SiRNAs were transfected into HeLa cells by Lipofectamin 2000. The expression of p42(MAPK) was analyzed by Western blot. The biological effect of siRNAs on HeLa cell growth was monitored by MTT and flow cytometry. RESULTS Two siRNAs (siRNA-2 and siRNA-3) among three tested were identified to be able to downregulate the p42(MAPK) expression. A concurrent growth retardation of HeLa cell line was observed in comparison with the control. CONCLUSION Inhibition of p42(MAPK) expression with siRNA technique can inhibit the proliferation of HeLa cells.
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Affiliation(s)
- Chen Huang
- Key Laboratory of Environment and Gene Related to Diseases, Ministry of Education, Medical School of Xi'an Jiaotong University, Xi'an 710061, China
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Huang C, Liu LY, Song TS, Ni L, Song LP, Si LS. [Small interfering RNA-mediated MAPK p42 silencing induces apoptosis of HeLa cells]. Nan Fang Yi Ke Da Xue Xue Bao 2006; 26:11-5. [PMID: 16495167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
OBJECTIVE To observe the effect of small interfering RNA (siRNA)-induced MAPK p42 silencing on the survival of HeLa cells. METHODS Two siRNAs targeting at the MAPK p42 gene and one random siRNA were synthesized respectively by Silencer siRNA Construction Kit and transfected into HeLa cells by Lipofectamin 2000. The expression of p42(MAPK) in the transfected HeLa cells was analyzed by Western blotting and immunohistochemistry, and the morphology of cells were observed with electron microscope. TUNEL assay and Annexin V/PI staining were employed for detecting the cell apoptosis. RESULTS The expression of p42(MAPK) in the HeLa cells was remarkably suppressed after transfection with the two siRNAs, reduced by about 2.5 and 3.2 folds respectively in comparison with the negative control. Chromatin margination in the cell nuclei were observed in the transfected cells, and TUNEL assay and Annexin V/PI staining further confirmed the occurrence of cell apoptosis. CONCLUSION In vitro MAPK p42 siRNA-1 and siRNA-2 transfection can specifically silence the gene expression and induce apoptosis of HeLa cells.
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Affiliation(s)
- Chen Huang
- Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Xi'an 710061, China
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Zhang PB, Liu Y, Li J, Kang QY, Tian YF, Chen XL, Zhao JJ, Shi QD, Song TS, Qian YH. Ependymal/subventricular zone cells migrate to the peri-infarct region and differentiate into neurons and astrocytes after focal cerebral ischemia in adult rats. Di Yi Jun Yi Da Xue Xue Bao 2005; 25:1201-6. [PMID: 16234089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
OBJECTIVE To investigate the migration and differentiation of ependymal/subventricular zone cells after focal cerebral ischemia in rats, and reveal the origin of the newly generated neural cells in the peri-infarct region. METHODS Normal adult male Sprague Dawley rats weighing 250-350 g were used in this study. Before middle cerebral artery occlusion (MCAO), 10 microl of 0.2% DiI was injected into the lateral ventricle for prelabeling the ependymal/subventricular zone cells. After ischemia, cumulative BrdU labeling was employed to detect the newly generated cells and double immunofluorescent staining to identify cell differentiation. The labeled cells were observed with laser confocal microscopy. RESULTS In the non-ischemic control rats, DiI-labeled cells resided in the ependyma/subventricular zone. After focal cerebral ischemia, DiI-labeled cells were found in the corpus callosum, adjacent striatum and cortex, and some DiI/BrdU/glial fibrillary acidic protein (GFAP)-positive cells or DiI/BrdU/ neuronal nuclear antigen (NeuN)-positive cells were observed in the peri-infarct region in the striatum or cortex since day 14 after MCAO. CONCLUSION After focal cerebral ischemia, ependymal/subventricular zone cells migrate into the peri-infarct region where they differentiate into neurons and astrocytes. This finding may be important for understanding the source of adult neural stem cells and for developing new therapeutic intervention strategy through enhancing endogenous neurogenesis after brain injury.
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Affiliation(s)
- Peng-bo Zhang
- Research Center for Neuroscience, Key Laboratory of Environment and Genes Related to Diseases of Education Ministry, Medical School of Xi'an Jiaotong University, Xi'an 710061, China.
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Olofsson P, Lu S, Holmberg J, Song T, Wernhoff P, Pettersson U, Holmdahl R. A comparative genetic analysis between collagen-induced arthritis and pristane-induced arthritis. Arthritis Rheum 2003; 48:2332-42. [PMID: 12905489 PMCID: PMC7159749 DOI: 10.1002/art.11100] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE To compare the genetic regulation of collagen-induced arthritis (CIA) with that of pristane-induced arthritis (PIA) in rats. METHODS A genome-wide linkage analysis of an (E3 x DA)DA backcross of rats with CIA (n = 364 male rats; the same strain combinations as previously used to determine the genetic control of PIA) was performed. The strongest loci in both CIA and PIA (i.e., Cia12/Pia4 and Cia13/Pia7) were isolated in congenic strains. Susceptibility in both congenic strains was tested in rats with CIA and in rats with PIA. RESULTS We found a striking, although not complete, similarity of the arthritis-controlling loci in CIA and in PIA, as well as the previously defined loci associated with cartilage destruction, antibody production, and the acute-phase response. All major PIA quantitative trait loci (QTLs) identified in early severe arthritis were also strong regulators of CIA. The 2 strongest QTLs, Cia12/Pia4 on chromosome 12 and Cia13/Pia7 on chromosome 4, were also analyzed in congenic strains with DA or E3 as the background genome. Consistent with the results of linkage analysis, the congenic strain experiments showed that the chromosome 4 locus was more penetrant in CIA than in PIA, while the chromosome 12 locus almost completely dominated the control of PIA severity. CONCLUSION The underlying genetic control of CIA was found to have many, but not all, pathogenic mechanisms in common with PIA, despite the use of a cartilage-specific antigen (type II collagen) to induce CIA but not PIA.
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Hu XY, Wang YL, Huang C, Song TS, Xu J, Kang XQ, Ni L, Zheng LM. [Genetic polymorphism of 3 STR loci of CSF1PO, TPOX and TH01 in Chinese Sibo population]. Zhonghua Yi Xue Yi Chuan Xue Za Zhi 2003; 20:82-3. [PMID: 12579513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
OBJECTIVE To obtain allele and genotype frequencies and related forensic data of CF1PO, TPOX and TH01 loci in Chinese Xinjiang Sibo population. METHODS Genomic DNA from peripheral blood mononuclear cells of normal Chinese Xinjing Sibo population was used as template, and CSF1PO, TPOX and TH01 fragments were amplified by PCR. The PCR products were analyzed by 4% denaturing PAGE and detected using silver stain detection. RESULTS Nine alleles were found at CSF1PO locus, eight alleles at TPOX locus and eight alleles at TH01 locus in Chinese Sibo population. All the 3 loci complied with Hardy-Weinberg equilibrium. The heterozygosities were 0.9426, 0.8361 and 0.8853, and the polymorphism information contents were 0.8298, 0.7213 and 0.7626 for CSF1PO, TPOX and TH01, respectively. CONCLUSION The data on the alleles frequency of these 3 STR loci might be used for individual identification and paternity identification and for genetic researches in Chinese Sibo population.
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Affiliation(s)
- Xiao-yan Hu
- Department of Genetics, Medical College, Xi'an Jiaotong University, Xi'an, Shaanxi, PR China. xtbyxj.soho.com
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Chen X, Huang C, Yuan Y, Liu R, Xu J, Song T, Li S. [Genetic polymorphism of D16S539, D7S820 and D13S317 loci in the Kazak ethnic population]. Zhonghua Yi Xue Yi Chuan Xue Za Zhi 2002; 19:55-7. [PMID: 11836689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To analyze the genetic polymorphism of D16S539, D7S820 and D13S317 in Chinese Kazak ethnic population from Xinjiang. METHODS One hundred and two unrelated individuals and a sample of families (n=42) were investigated by multiplex amplification, 6% denaturing PAGE and silver staining. And, the obtained allele frequencies were compared with those of other populations. RESULTS Eight, seven, eight alleles were observed at the 3 STR loci respectively and the genotypes distributions were in accordance with Hardy-Weinberg equilibrium. The expected heterozygosities for these loci were 0.9439, 0.9356 and 0.9304; the calculated polymorphism formation content (PIC) was 0.9905; the discrimination power (DP), 0.9998; the paternity exclusion (PE), 0.9572. In addition, significant difference was found in comparison with other populations, and in the sample of families (n=42) no new mutations could be found. CONCLUSION The multiplex examination of 3 STR loci can be used in forensic identification and population genetics research.
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Affiliation(s)
- Xueling Chen
- Department of Medical Immunology, Medical College of Shihezi University, Shihezi, Xinjiang, 832002 P. R. China.
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