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AIM:To investigate the serum miRNA-101 expression level in patients with newly diagnosed type 2 diabetes mellitus (T2DM),and to evaluate the clinical implications of miRNA-101 expression level variation.METHODS:qRT-PCR was used to determine the serum miRNA-101 expression level.Pearson correlation analysis was performed to observe the relationship between two variables.Multiple stepwise linear regression analysis was used to assess the association of serum miRNA-101 level and other parameters.RESULTS:Serum miRNA-101 level in patients with newly diagnosed T2DM was significantly higher than that in control subjects (P ＜ 0.05).The serum level of miRNA-101 was positively correlated with the glycosylated hemoglobin A1c (HbA1c,P ＜0.05).Multiple linear regression analysis revealed that the circulating miRNA-101 was in significant positive correlation with HbA1c (P ＜ 0.05) after adjustment for age,sex and body weight.CONCLUSION:Enhanced circulating miRNA-101 level in newly diagnosed T2DM patients may be associated with elevation of HbA1 c.
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Objective To explore the expression differences of long noncoding RNA (LncRNA) LOC100288637 in liver canc‐er ,the effect of LOC100288637 on liver cancer cell proliferation and the relevant mechanisms .Methods Based on the analysis of the GEO database data sets GSE58043 and GSE10694 ,we found that both LOC100288637 and hsa‐miR‐101‐3p has obvious expression differences in liver cancer tissues .RNA hybrid revealed the possibility of combination between LOC 100288637 and hsa‐miR‐101‐3p;RT‐PCR was performed to measure the expression level of LOC100288637 in tissues and cells ;fluorescence in situ hybridization was used to observe LOC100288637 localization in cells ;cell proliferation was determined by CCK8 experiment after LOC100288637 siRNA knock down .The expression of LOC100288637 in cells were measured after treated with hsa‐miR‐101‐3p mimics .Results Relative quantitative expression of LOC100288637 in liver cancer tissues group was significantly higher than that in no tumor tis‐sues group (P<0 .05);relative quantitative expression of LOC100288637 in liver cancer cell lines were significantly higher than that in normal liver cell line(P<0 .05) .LOC100288637 was located in both cytoplasm and nucleus of HepG2 cells ,and mainly in cy‐toplasm .Cell proliferation vitality of HepG2 reduced after treated with LOC100288637‐siRNA(P<0 .01) .Relative quantitative ex‐pression of LOC100288637 in HepG2 reduced after treated with hsa‐miR‐101‐3p mimics ( P< 0 .05 ) .Conclusion LncRNA LOC100288637 may play an important role in liver cancer development ,it can be down regulated by hsa‐miR‐101‐3p and affect the proliferation of liver cancer cells .
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Objectives To investigate the expressions of miR-101 and COX-2 in colorectal cancer. Methods Thirty-twocolorectal cancer specimens and paired paracancer tissues were collected for assessment of miR-101 and COX-2 expressions by real-time quantitative PCR. Thecorrelation between miR-101 and COX-2 , as well as their correlations with the pathologywere analyzed. Results The expression level of miR-101 and COX-2 mRNA in the cancer tissues was significant difference between the cancer and para-cancer tissues (P 0.05). Conclusion Down-regulated miR-101 expression andparallel COX-2 overexpression hasbeen linked to colorectal cancer. miR-101 and COX-2might be thepotentialdiagnostic markers and therapeutic targets.
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Objective To investigate the expression of microRNA‐101 (miRNA‐101 ) in human gastric cancer ,and to explore its effects on proliferation ,migration and invasion of gastric cancer cell . Methods The expression of miRNA‐101 in 28 human gastric cancer tissues ,human gastric cell lines BGC‐823 , SGC‐7901 , MKN‐45 , AGS and human normal gastric epithelial cell line GES‐1 were determined by real time polymerase chain reaction (PCR) .Recombinant miRNA‐101 adenovirus vector was constructed . The effects of miRNA‐101 on gastric cancer proliferation was detected with cell proliferation assay .The ability of gastric cancer cell migration and invasion was assessed with Transwell assay .Gastric xenograft cancer model was established in BALB /c nude mice and the tumor size was compared .The t test was used for the statistical analysis .Results The expression of miRNA‐101 in gastric cancer tissues was 0 .661 ± 0 .396 ,which was lower than that of corresponding para carcinoma tissues (1 .128 ± 0 .697) ,and the difference was statistically significant (t = 10 .091 , P < 0 .01) .The expression of miRNA‐101 in normal gastric epithelial cell line GES‐1 was higher than those of gastric cancer cell lines BGC‐823 ,SGC‐7901 , MKN‐45 and AGS . There was significant suppression role of miRNA‐101 on MKN‐45 cells proliferation , and which also had inhibition role on cell migration and invasion of gastric cancer cell lines BGC‐823 ,SGC‐7901 ,MKN‐45 and AGS .At five weeks after MKN‐45 gastric xenograft cancer nude mice model established ,the tumor size of Ad‐miRNA‐101 group ((333 .56 ± 46 .71) mm3 ) was smaller than that of Ad‐enhanced green fluorescent protein (EGFP) group (806 .41 ± 51 .83) mm3 ,and the difference was statistically significant (t = 21 .431 , P < 0 .01 ) .Conclusion In gastric tissues and cells ,miRNA‐101 is a tumor suppressive miRNA and its downregulated expression involved in the genesis and development of gastric cancer ,which may be a new target of biological target therapy in gastric cancer .
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Objective To observe effects of forced expression of miRNA -101 on glioma U251 cells proliferation and invasion. Meth ods MiRNA-101 oligoneucleotide was transfected into U 251 cells with liposome .MTT assay measured cell proliferation and Tr-answell assay detected cell invasion .Results Compared with control groups ,the growth and invasion of U251 cells transfected with miRNA-101 were decreased markably .Conclusions MiRNA-101 may play important role in inhibiting glioma cell growth and inva-sion.