OBJECTIVETo examine the micro-RNA (mirna) expression profile in tissues of early gastric cancer and to screen the specific mirna associated with gastric cancer.

METHODSGene chip technology was used to detect the expression of mirna in early gastric cancer tissues and adjacent normal tissues.

RESULTSCompared to adjacent normal tissues, a total of 36 mirnas were down-regulated, such as mir-9-1, mir-103 and mir-141, while 12 mirnas were up-regulated, such as mir-196a, mir-142-3p and mir-25, etc.

CONCLUSIONAbnormal mirna expression level in early gastric cancer tissues may be associated to the development of gastric cancer.

Down-Regulation ; Gene Expression Regulation, Neoplastic ; Humans ; MicroRNAs ; genetics ; Oligonucleotide Array Sequence Analysis ; Stomach Neoplasms ; genetics ; Up-Regulation

OBJECTIVETo study the expression level and clinical significance of miR-181c-3p and miR-5692b in esophageal cancer.

METHODSThe microRNA (miRNA) profiles of esophageal squamous cell carcinoma were analyzed by miRNA microarray in 55 cases of esophageal cancer. The expression levels of miR-181c-3p and miR-5692b from 55 pairs of tumor tissues and adjacent non-neoplastic tissues were determined by qRT-PCR analysis.

RESULTSBoth miR-181c-3p and miR-5692b were significantly up-regulated in tumor tissues compared with adjacent non-neoplastic tissues. Their expression was also significantly associated with tumor size, depth of invasion and clinical tumor stage (P<0.05). High expression of miR-181c-3p and miR-5692b were significantly associated with poor prognosis (P<0.05). Multivariate Cox regression analysis confirmed that high expression of miR-181c-3p and miR-5692b was poor prognostic indicators in esophageal cancer.

CONCLUSIONSThere are significant correlation between miR-181c-3p/miR-5692b expression, clinicopathologic parameters and prognosis. They represent potential prognostic biomarkers in esophageal squamous cell carcinoma.

Carcinoma, Squamous Cell ; genetics ; Esophageal Neoplasms ; genetics ; Gene Expression Regulation, Neoplastic ; Humans ; MicroRNAs ; genetics ; Prognosis ; Up-Regulation

OBJECTIVETo detect and analyze the characteristic miRNAs profile of anal fistula and explore their possible target genes and potential clinical significance.

METHODSThe anal mucosa close to the hemorrhoids were collected from three patients undergoing fistulectomy and hemorrhoidectomy (fistula group) as well as three patients receiving only hemorroidectomy(hemorrhoids group), matching with fistula group in age, gender and body weight. miRNA microarray was used to compare the expression of 1 285 human miRNAs of the anal mucosa between two groups. Cluster analysis was adopted to analyze the accumulation of the differentially expressed miRNAs(P<0.05, fold≥2.0 or ≤0.5) and their target genes were predicted with 10 softwares such as DIANAmT, miRanda, miRDB, miRWalk etc. Comprehensive scoring was performed to identify genes with highest predictive score. Gene ontology (GO) concentration technique was used to analyze the target gene-associated biological process. Immunohistochemistry was used to examine protein expression of genes with the highest score.

RESULTSAmong 1285 miRNAs in fistula group, 13 miRNAs were differentially expressed with those in hemorrhoid group, including 2 of up-regulation and 11 of down-regulation. Paired t test showed that in fistula group, miRNA-3609 up-regulation was 5.98 folds(P=0.0231) and miR-181a-2-3p down-regulation was 0.13 folds(P=0.0067) compared to those in hemorrhoid group, which had the greatest differential expression. Cluster analysis suggested that up-regulated miR-3609 and miR-6086 had similar change trend in both groups. Among 11 down-regulated miRNAs, miR-125bp-1-3p and miR-548q had similar expression and other 9 miRNAs had similar expression as well, including miR-1185-1-3p, miR-532-3p, miR-1233-5p, miR-769-5p, miR-149-5p, miR-99b-3p, miR-141-3p, miR-138-5p, and miR-181a-2-3p. Target gene prediction analysis of above 13 genes showed that 7 miRNAs(53.8%) were eligible to predict their potential target genes, yielding totally 104 possible target genes. The rest of 6 miRNAs(46.2%) failed to predict any target gene. The highest score in prediction of target gene was chitinase 1(ChIT1) and its corresponding differential miRNA was miR-769-5p(r=-0.94286, P=0.0167). Gene ontology analysis showed that the most associated biological process related with these 104 target genes was keratinization, immune response and signal transduction. Immunohistochemistry revealed ChiT1 expression of anal mucosa in fistula group was significantly higher compared to hemorrhoid group(P<0.01).

CONCLUSIONSThere is a characteristic miRNAs profile in anal fistula patients, which may play a role in the occurrence and development of anal fistula.

Cluster Analysis ; Down-Regulation ; Humans ; MicroRNAs ; Rectal Fistula ; genetics ; Signal Transduction ; Up-Regulation

OBJECTIVE: To isolate the collagen phagocytic subpopulation of fibroblast (CPSF) and non-collagen phagocytic subpopulation of fibroblast (nCPSF) and to identify their differentially expressed genes.
 METHODS: The CPSF and nCPSF was isolated by using collagen-fluorescein-isothiocynate-latex bead (COL-FITC-LB) phagocytosis technique and FCM sorting method. Microarray analysis was used to screen the differentially expressed genes, which were verified by real-time PCR. 
 RESULTS: CPSF and nCPSF was successfully isolated. Seventeen differentially expressed genes were identified. Compared with nCPSF, the expression of 12 or 5 genes was up-regulated or down-regulated in CPSF. Three of the 12 up-regulated genes were urokinase plasminogen activator receptor-associated protein (uPARAP), cytochrome b-245, beta polypeptide (CYBB) and Hook homolog 1 (HOOK1), which were confirmed by real-time PCR. uPARAP mRNA expression level in CPSF was 2788 times of that in nCPSF. CYBB mRNA expression in CPSF was only 0.85 times of that in nCPSF. HOOK1 mRNA expression in CPSF was 1.96 times of that in nCPSF (P<0.05). 
 CONCLUSION A novel method is successfully established to isolate CPSF and nCPSF. uPARAP is the main differentially expressed gene in CPSF and nCPSF, which is obviously involved in the fibroblast collagen phagocytosis. It might be a potential biomarker for treatment of collagen diseases.
Collagen ; genetics ; Down-Regulation ; Fibroblasts ; cytology ; Humans ; Microarray Analysis ; Phagocytosis ; Up-Regulation

OBJECTIVETo investigate the expression of microRNA-107 (miR-107) and its functional role in hepatocellular carcinoma(HCC).

METHODSThe gene chip data of HCC obtained from the Gene Expression Omnibus (GEO) database and the Cancer Genome Atlas (TCGA) database were used to analyze the expression levels of miR-107 in liver cancer. Twenty-two pairs of fresh surgical specimens of HCC and adjacent tissues and 53 paraffin-embedded specimens of HCC were examined for miR-107 expression by qRT-PCR. The correlation of the expression levels of miR-107 with the clinicopathologic characteristics of the patients were analyzed. The role of miR-107 in regulating the proliferation of hepatocellular carcinoma cells were determined by MTT assay in Huh7 cells transfected with a miR-107 mimic or inhibitor.

RESULTSThe expression levels of miR-107 were significantly up-regulated in HCC tissues as compared to the adjacent tissues (P<0.05) in positive correlation with the tumor size (P<0.032). Transfection with miR-107 mimics significantly promoted the cell proliferation (P<0.0001) while miR-107 inhibitor inhibited the cell proliferation (P<0.0001).

CONCLUSIONThe expression of miR-107 is up- regulated in HCC tissues and its expression levels are correlated with HCC cell proliferation, suggesting its role as a potential oncogene in liver cancer.

Carcinoma, Hepatocellular ; genetics ; Cell Proliferation ; Humans ; Liver Neoplasms ; genetics ; MicroRNAs ; genetics ; Transcriptional Activation ; Up-Regulation

OBJECTIVETo investigate the effects of tumor suppressor gene PTEN on apoptosis and protein expression of p53 in HepG2 cells, as well as to explore its mechanisms.

METHODSHepG2 cells were transfected with GFP plasmids containing wild-type PTEN or G129E-PTEN and C124A-PTEN in vitro. Both the expression of wild-type p53 and the phosphorylation of protein kinase B (PKB/Akt) and focal adhesion kinase (FAK) were detected by Western blotting. Flow cytometry and confocal microscopy were used to analyze apoptosis of the transfected cells.

RESULTSCompared with the control, the expression of phosphorylated FAK and phosphoylated Akt were down-regulated in HepG2 cells transfected with wild-type PTEN (-65%, -93%) and G129E-PTEN (-65%, -35%), whereas the apoptosis percentage increased to (19.8+/-1.2)% and (9.2+/-0.6)%, and p53 expression was up-regulated by 120% and 50%, respectively. However, in the cells transfected with C124A-PTEN, neither the phosphorylation of FAK and Akt nor the apoptosis percentage and p53 expression had changed.

CONCLUSIONPTEN can dephosphrylate FAK through its protein phosphatase activity, and suppress phosphorylation of Akt mainly through its lipid phosphatase activity. Consequently, it can induce apoptosis of HepG2 cells and up-regulate p53 expression.

Apoptosis ; drug effects ; Carcinoma, Hepatocellular ; genetics ; pathology ; Gene Expression Regulation, Neoplastic ; Humans ; Liver Neoplasms ; genetics ; pathology ; PTEN Phosphohydrolase ; genetics ; Tumor Suppressor Protein p53 ; biosynthesis ; genetics ; Up-Regulation

IL-6 is an inflammatory cytokine and its overexpression plays an important role in osteoarthritis (OA) pathogenesis. Expression of IL-6 is regulated post-transcriptionally by MCPIP1. The 3' untranslated region (UTR) of MCPIP1 mRNA harbors a miR-139 'seed sequence', therefore we examined the post-transcriptional regulation of MCPIP1 by miR-139 and its impact on IL-6 expression in OA chondrocytes. Expression of miR-139 was found to be high in the damaged portion of the OA cartilage compared with unaffected cartilage from the same patient and was also induced by IL-1beta in OA chondrocytes. Inhibition of miR-139 decreased the expression of IL-6 mRNA by 38% and of secreted IL-6 protein by 40%. However, overexpression of miR-139 increased the expression of IL-6 mRNA by 36% and of secreted IL-6 protein by 56%. These data correlated with altered expression profile of MCPIP1 in transfected chondrocytes. Studies with a luciferase reporter construct confirmed the interactions of miR-139 with the 'seed sequence' located in the 3' UTR of MCPIP mRNA. Furthermore, miR-139 overexpression increased the catabolic gene expression but expression of anabolic markers remained unchanged. Overexpression of miR-139 also induced apoptosis in OA chondrocytes. Importantly, we also discovered that IL-6 is a potent inducer of miR-139 expression in OA chondrocytes. These findings indicate that miR-139 functions as a post-transcriptional regulator of MCPIP1 expression and enhances IL-6 expression, which further upregulates miR-139 expression in OA chondrocytes. These results support our hypothesis that miR-139-mediated downregulation of MCPIP1 promotes IL-6 expression in OA. Therefore, targeting miR-139 could be therapeutically beneficial in the management of OA.
3' Untranslated Regions ; Aged ; *Apoptosis ; Chondrocytes/*metabolism/pathology ; Down-Regulation ; Female ; Gene Expression Regulation ; Humans ; Interleukin-6/*genetics ; Male ; MicroRNAs/*genetics ; Middle Aged ; Osteoarthritis/*genetics/pathology ; RNA, Messenger/genetics ; Ribonucleases/*genetics ; Transcription Factors/*genetics ; Up-Regulation

OBJECTIVE: To investigate the expression of miR-33b in hepatocellular carcinoma (HCC) and to explore regulatory mechanism of miR-33b for cell proliferation of HCC.
 METHODS: HCC tissues and adjacent non-tumor tissues were collected for this study (n=32 for each). Real-time PCR and Western blot were conducted to examine the mRNA and protein expression, respectively. MTT assay was used to detect the cell proliferation. Luciferase reporter gene assay was performed to verify the target relationship between miR-33b and Sal-like 4 (SALL4).
 RESULTS: MiR-33b was significantly downregulated in HCC tissues compared with adjacent non-tumor tissues. Overexpression of miR-33b decreased the proliferation of HCC LH86 cells. SALL4 was identified as a target gene of miR-33b, and its protein expression was negatively regulated by miR-33b. Overexpression of SALL4 reversed the suppressive effect of miR-33b on LH86 cell proliferation. SALL4 was significantly upregulated in HCC tissues compared with adjacent non-tumor tissues.
 CONCLUSION The miR-33b suppresses HCC cell proliferation through down-regulation of SALL4.
Carcinoma, Hepatocellular ; chemistry ; genetics ; physiopathology ; Cell Proliferation ; genetics ; physiology ; Down-Regulation ; Gene Expression Regulation, Neoplastic ; genetics ; physiology ; Humans ; Liver Neoplasms ; MicroRNAs ; analysis ; genetics ; physiology ; RNA, Messenger ; Real-Time Polymerase Chain Reaction ; Transcription Factors ; genetics ; physiology ; Tumor Cells, Cultured ; Up-Regulation

Objective To investigate effect of let-7a gene over-expression on apoptosis of gastric cancer cell lines SGC-7901.Methods The stable let-7a gene over-expressing SGC-7901 cells, SGC-7901/let-7a cells, were established using shRNA lentiviral vector methods. Real-time RT-PCR analysis was used to evaluate the expression level of let-7a mRNA. Cells apoptosis was assessed by flow cytometry.Results RT-PCR analysis revealed let-7a expression in SGC-7901/let-7a cells was significantly increased. Cellular apoptosis assay showed that over-expression of let-7a could increase apoptosis of SGC-7901 cells (P=0.002).Conclusion Up-regulating let-7a expression promoted apoptosis in SGC-7901 cells.
Apoptosis ; Cell Line, Tumor ; Gene Expression Regulation, Neoplastic ; Humans ; MicroRNAs ; biosynthesis ; genetics ; RNA, Neoplasm ; biosynthesis ; genetics ; Stomach Neoplasms ; genetics ; metabolism ; pathology ; Up-Regulation

OBJECTIVETo determine the distribution and the predominant gene carrying model of drug inactive enzyme genes in bacterial isolates, and the mechanism of its induction and inhibition.

METHODSThe β-lactam, aminoglycosides and macrolides inactive enzyme genes were detected by PCR and sequencing in S. aureus, E.coli, K. pneumoniae, A. baumannii and E. cloacae isolates. The expression of inactive enzyme genes were examined by real-time fluorescent quantitative RT-PCR when the bacterial isolates were treated with antibiotics or a histidine kinase blocker closantel.

RESULTSIn 63 isolates of E.coli, 4 kinds of β-lactam, 2 aminoglycosides and 1 macrolides inactive enzyme-encoding genes were detected and the predominant gene-carrying models were [TEM+CTX-M]+aac(3)-II+mphA (25.4 %) and [TEM+CTX-M]+ aac (6')-I b (20.6%). In 24 isolates of S.aureus, 2 kinds of β-lactam and 3 aminoglycosides inactive enzyme-encoding genes were detected and the predominant gene-carrying models were aph (3')(41.7%) or aac (6)-I e-aph (2)-I a (25.0%). In 28 isolates of K.pneumoniae, 4 kinds of β-lactam and 2 aminoglycosides inactive enzyme-encoding genes were detected and the predominant gene-carrying models were [TEM+SHV]+[aac(6')-I b+aac (3)-II](28.6 %) and [TEM+SHV]+[aac(6')-I b+aac (3)-II]+ mphA (17.8 %). The isolates of A.baumannii and E.cloacae also had a predominant model to carry 2 or 3 kinds of inactive enzyme-encoding genes. 1/4 MIC of penicillin, cefotaxime or streptomycin induced the up-regulation of expression of 3 β-lactam or 4 aminoglycosides inactive enzyme-encoding genes (P<0.05), and this effect was inhibited by closantel (P<0.05).

CONCLUSIONThe bacterial isolates frequently carry multiple kinds of inactive enzyme-encoding genes with different predominant gene-carrying models.Low concentration antibiotics can induce the up-regulation of inactive enzyme gene expression, which can be inhibited by histidine kinase blocker.

Anti-Bacterial Agents ; pharmacology ; Bacteria ; enzymology ; genetics ; Drug Resistance, Multiple, Bacterial ; genetics ; Gene Expression Regulation, Bacterial ; Up-Regulation ; drug effects ; beta-Lactamases ; genetics