Objective:To detect the expression level of microRNA-634 (miR-634) in hepatocellular carcinoma (HCC) and its regulatory effect on the common biological behavior of hepatocellular carcinoma cells .Methods: Real-time fluorescence quantitative PCR (RT qPCR) method was used to detect HCC cell lines (HepG2, SMMC7721, BEL7402, bel7404, SNU739), 69 cases of HCC tissues and matching relative quantification of miR-634 paracancerous tissues and analysis of relationship between miR-634 expression and HCC patients gender, age, tumor size, degree of differentiation, child Pugh classification, BCLC staging, portal vein tumor thrombus and liver metastasis , while building a miR-634 eukaryotic expression vector and transfected into hepatocellular carcinoma cell lines, using live cell counting kit-8 CCK-8, flow cytometric annexin V/PI double staining and Transwell experiment to detect the transfection miR-634 on cell proliferation , apoptosis and invasion effects .Results:Compared with the normal human liver cell line L-02 and hepatocellular carcinoma cells miR-634 were decreased ( P<0.05 ) , the expression followed by HepG 2>SNU739>Bel7402>Bel7404>SMMC7721;69 cases of hepatocellular carcinoma ( HCC ) of miR-634 level ( 0.253 ±0.019 ) and lower than that of the matched paracancerous tissues ( P<0.05 ) , and related with the tumor size , degree of differentiation , BCLC stage , portal vein tumor thrombus and liver metastasis ( P<0.05 ) .Over expression in the transfected group 24-96 h after miR-634 level continues to rise , control group and blank vector transfected group differences were statistically significant ( P<0.05 );and the control transfection group and blank group compared to transfection proliferation inhibition rate , apoptosis rate was increased , but wear the number of cell membrane decreased, the difference was statistically significant (P<0.05).Conclusion:miR-634 in hepatocellular carcinoma tissues and cells were low expression and related to clinical pathological parameters , raised its level can inhibit the proliferation and invasion of hepatocellular carcinoma cells and induce apoptosis , for the prevention and treatment of liver cancer has an important reference value .

Humans ; MicroRNAs ; Occupational Medicine

Objective: Self-enhancement is a kind of motive that urges people to attend exclusively to the positive aspects of himself,it is so intense that individuals even tend to distort the threatening information to some degree so that they can maintain a positive self-view. This research is to investigate the pattern of self-enhancement of Chinese people. Methods: Self-enhancement was measured by requiring participants to make self attribution as well as other attribution of their success and failure on eight factors. Results: There existed strong self-enhancement motive in Chinese individuals. Specifically,Chinese undergraduates attribute their success to inner factors such as personality and effort. This trends also evident in the conditions in which participants were asked to speculate the attribute pattern of other people like his/her mother on their own success and failure. Conclusion: Chinese undergraduates tend to enhance the self-image in other people's eyes.

Objective To explore the efficacy of intratympanic dexamethasone injection in treating acute low-frequency hearing loss(ALHL).Methods Thirty-seven ALHL cases not responsive to intravenous dexamethasone and vasodilator medications were enrolled in the study and divided into two groups.In the treatment group,dexamethasone was injected intratympanically once per day to 18 cases for a seven-day history with unilateral ALHL and 1 case with bilateral ALHL.In the control group,18 cases with unilateral ALHL were given intravenous vasodilator medications for 7 days.All patients were followed up for 1～ 2 years.Results In the treatment group with unilateral ALHL,8 cases achieved complete recovery,7 cases achieved partial recovery and no change was observed in the other 3 cases.The efficiency was 83.3 %.2 cases showed recurrent low-frequency hearing loss during the follow-up period.One case with bilateral ALHL did not respond to the treatment and no recurrence was observed.No side effect was observed in the study.In the control group,3 cases completely recovered,5 cases partially recovered and 10 cases showed no improvement.The efficiency was 44.4%.5 cases recurred and one of them progressed to Meniere's disease.There was a statistically significant difference in efficiency of patients with unilateral ALHL between two groups(P＜0.05).Conclusion Intratympanic dexamethasone application was an effective and safe treatment option for ALHL.

Objective To identify the LongSAGE tags from yeast LongSAGE library and hyphal LongSAGE library of Candida albicans. Methods The technique called the generation of longer cDNA fragments from serial analysis of gene expression (SAGE) tags was used for gene identification (GLGI). The SAGE tags of 17 bases were converted into their corresponding 3′ cDNA fragments covering hundred bases, and the sequence was analyzed. Results Fifteen out of twenty tags were stably and efficiently extended with the base size between 200-1 000 bp. The sequence was considered to represent a known gene since it matched a full-length transcript sequence with over 95% similarity in the same orientation, including the same 17-bp SAGE tag sequence. Conclusion By using novel SAGE tags as primer, we can identify efficiently many novel transcripts. A combined application of SAGE-GLGI can be used to define the boundary of expressed genes in the genomic sequences in Candida albicans and in other eukaryotic genomes.

To study the change in mGluR1? in CA 1 after infrasonic damage and the effect of its antagonist MCPG,120 SD rats were randomizied into infrasonic damage group and MCPG therapy group.The two groups were subdivided into control group and 1 challenge, 7 chellenges, 14 challenge groups respectively,each group consisted of 15 rats. Rats were exposed to 8Hz 130dB infrasound as designed,2h for each challenge.The mGluR1? was stained by immunohistochemistry method.The changes in mGluR1? and cell pattern were observed under light and electronic microscopes.The results showed the number of mGluR1? positive neurons increased after 1 challenge infrasonic damage( P 0 05).MCPG had an effect to protect neuron from infrasonic damage as identified by morphology.It is concluded that the change of mGluR1? activity could mediate excitotoxicity and was one of the major factors related with neuron injury after infrasound.

OBJECTIVE To investigate effects of Wudang cherry on urate excretion and renal function and examined whether renal organic ion transporters were involved in potassium oxonate-induced hyperuricemic mice. METHODS The model of hyperuricemic mice was induced by intraperitoneal injection of potassium oxonate (250 mg·kg- 1) for 7 d. Water extracts of Wudang cherry at 500 mg·kg- 1 were orally administered to hyperuricemic mice for 7 d, benzbromarone (20 mg·kg- 1) and allopurinol (20 mg · kg- 1) were given as positive controls, vehicle control group was given equal normal saline. Serum and urine levels of uric acid were measured in hyperuricemic and normal mice. Simultaneously, the mRNA and protein levels of mouse urate transporter 1 (mURAT1), glucose transporter 9 (mGLUT9), organic anion transporters (mOAT1 and mOAT3), ATP- binding cassette, subfamily G, membrane 2 (mABCG2) and organic cation/carnitine transporters (mOCT1, mOCT2, mOCTN1 and mOCTN2) in the kidney were analyzed by Western blot, RT-PCR, immunohistochemical and immuno?fluorescent assay, respectively. RESULTS Wudang cherry significantly reduced serum uric acid levels and increased urine uric acid levels in hyperuricemic mice. And it effectively reversed potassium oxonate-induced alterations in renal mURAT1, mGLUT9, mOAT1, mOAT3 and mABCG2 mRNA and protein levels, resulting in the enhancement of renal urate excretion in mice. Moreover, Wudang Cherry increased renal mOCT1, mOCT2, mOCTN1 and mOCTN2 mRNA and protein levels, and improved renal impairment in this model. CONCLUSION Wudang cherry processes uricosuric and nephroprotective actions by regulating renal organic ion transporters in hyperuricemic mice.

OBJECTIVE To investigate effects of Wudang cherry on urate excretion and renal function and examined whether renal organic ion transporters were involved in potassium oxonate-induced hyperuricemic mice. METHODS The model of hyperuricemic mice was induced by intraperitoneal injection of potassium oxonate (250 mg·kg- 1) for 7 d. Water extracts of Wudang cherry at 500 mg·kg- 1 were orally administered to hyperuricemic mice for 7 d, benzbromarone (20 mg·kg- 1) and allopurinol (20 mg · kg- 1) were given as positive controls, vehicle control group was given equal normal saline.Serum and urine levels of uric acid were measured in hyperuricemic and normal mice. Simultaneously, the mRNA and protein levels of mouse urate transporter 1 (mURAT1), glucose transporter 9 (mGLUT9), organic anion transporters (mOAT1 and mOAT3), ATP- binding cassette, subfamily G, membrane 2 (mABCG2) and organic cation/carnitine transporters (mOCT1, mOCT2, mOCTN1 and mOCTN2) in the kidney were analyzed by Western blot, RT-PCR, immunohistochemical and immuno?fluorescent assay, respectively. RESULTS Wudang cherry significantly reduced serum uric acid levels and increased urine uric acid levels in hyperuricemic mice. And it effectively reversed potassium oxonate-induced alterations in renal mURAT1, mGLUT9, mOAT1, mOAT3 and mABCG2 mRNA and protein levels, resulting in the enhancement of renal urate excretion in mice. Moreover, Wudang cherry increased renal mOCT1, mOCT2, mOCTN1 and mOCTN2 mRNA and protein levels, and improved renal impairment in this model. CONCLUSION Wudang cherry processes uricosuric and nephroprotective actions by regulating renal organic ion transporters in hyperuricemic mice.

ored carefully.

Objective To explore the improving effect of L-leucine on memory impairment in plateau and the mecha-nism. Methods After successfully trained in the 8-arm radial maze,50 male Kunming mice were selected and randomly divid-ed into normoxic control group (NC group),model group,and L-leucine (low,medium and high dose) groups.Animals in L-leu-cine groups were intragastrically given 0.473 g?kg-1 ,0.945 g?kg-1 and 1.89 g?kg-1 L-leucine for 7 days and those in NC and model control groups were administered the same volume of purified water for the same period of time.At the 4th day of the treat-ment,the mice in the model control group and L-leucine groups were placed in a large low-pressure and low-oxygen chamber to simulate low-pressure hypoxic environment of the plateau (7 500 m,3 d).The 8-arm radial maze was used to measure the spatial learning and memory ability of mice and dry-wet method to measure the water content of brain tissue.HE staining was employed to observe the cell morphological changes in CA1 region of the hippocampus.The expression levels of mTOR,P70S6K and 4E-BP1 mRNA in the hippocampus were detected by SYBR Green real-time PCR. Results The reference memory error ( RME) ,total error ( TE) ,testing time ( TT) ,and water content of brain tissue were significantly increased,the neuron injury was exacerbated in CA1 region of the hippocampus,and the expression levels of mTOR and P70S6K mRNA were markedly decreased in model control group when compared with those in NC group (P<0.05 or P<0.01).These indexes,however,were significantly improved in L-leu-cine groups,especially in high-dose group. Conclusion L-leucine can improve memory impairment in plateau,and the mecha-nism may involve the activation of mTOR and its downstream substrates (4E-BP1 and P70S6K).