Dust ; Humans ; Silicon Dioxide ; adverse effects ; Silicosis ; etiology

Objective Motility is an important physiological characteristic of a mature sperm.Nerve growth factor(NGF) is a protein essential for the development,maintenance and survival of the peripheral and central nervous systems.NGF and its receptors TrkA and p75 are widely expressed in the testis,accessory reproductive organ,and the epididymal sperms.In the present study,we investigated the role of NGF on human sperm motility.Methods Use 0.1,1 and 10 μmol/L concentrations of NGF,on sperm motility study to investigate the optimal concentration.Use CASA to detect Sperm motility changes every 10 minutes in an hour after 10 μmol/L NGF was added to the semen.Results The parameters of sperm motility increased after NGF incubation had significant difference, in particular,VAP,VSL,VCL,BCF and LIN mean were significantly increased more than 32%.MAD,STR,ALH and WOB mean had no notable difference.Furthermore,NGF promotes the sperm motility in a time- and dose- dependent manner.In addition,the enhancement of NGF on sperm motility was more stronger than those of sperm culture medium.Conclusion Our findings suggest that NGF plays a promoted role in human sperm motility.

Objective To investigate the effect and underlying mechanisms of ghrelin in a rat model of renal fibrosis. Methods Male Sprague-Dawley rats were divided into 4 groups , including sham operation +saline or brain gut peptide treatment group , model + saline or brain gut peptide treatment group. Unilateral ureteral obstruction (UUO) was established by left ureteral ligation. 7 days and 14 days after operation, the rats were sacrificed , while the kidney tissue of obstruction side was harvested for pathlogical changes through Masson coloration. Expression of α-smooth muscle actin (α-SMA), transforming growth factor beta1 (TGF-β1) and phosphorylated Smad3 (p-Smad3) in renal tissues were analyzed through immunohistochemistry. Expression of α-SMA and TGF-β1 mRNA was detected by real-time-PCR. Apoptosis kidneys cells were marked with TUNEL. Results Ghrelin inhibited renal fibrosis by reducing the production of collagen , restraining extracellular matrix (ECM) deposition and decreasing the expression of α-SMA. Meanwhile, ghrelin inhibited the accumulation of myofibroblasts by blocking the transforming growth factor-β1/Smad3 (TGF-β1/Smad3) signaling pathway. Moreover, ghrelin could attenuate renal tubular cell apoptosis induced by UUO injury. Conclusion Ghrelin can reduce renal fibrosis and renal cell apoptosis induced by UUO , demonstrating that ghrelin is a potent antifibrotic agent that may have therapeutic potential for patients with obstructive nephropathy.

Objective To investigate the effects of intense pulsed light(IPL) on the collagen metabolism in human fibroblasts.Methods The callan foreskin fibroblasts were cultured and treated with different wave length and designed dose of IPL irradiation(590-1 200 nm,and 29 J/cm2),while 10 without IPL irradiation as controls.By culturing 1,12,24 and 48 h after the irradiation,the synthesis of collagen was measured by 3H-proline incorporation determination. Results The synthesis of collagen activity increased significantly(P

0.05), CGI and HAMA. Safety analysis suggested that no significant differences were found in symptoms and frequency of side effects between the two groups.Conclusion Bupropion hydrochloride tablet is an effective and safe antidepressant. It has similar effect and safety compared with fluoxetine in the treatment of depression.

OBJECTIVETo investigate the effects of Shexiang Baoxin Pill (SBP) in intervening atherosclerosis and myocardial infarction (AS-MI) in experimental animals, and inspect its influences on angiogenesis.

METHODSTwenty male New-Zealand rabbits were made into AS-MI model, and randomly divided into 2 groups equally. Group A was fed with high-fat diet for control; Group B was fed with high-fat diet but intervened with SBP. The cardiac function and the positive area of plaque were determined. The CD34 positive response intensity at infarcted marginal zone and aorta vessel wall, and the capillary density of myocardium were measured by immunohistochemical staining. In addition, the protein expressions of vascular endothelial growth factor (VEGF) and vascular endothelial growth factor receptor-2 (VEGFR-2) were detected by Western blot.

RESULTSCompared to Group A, the cardiac function was obviously improved (P<0.05) and the plaque positive area (%) was significantly decreased in Group B (45.82 +/- 3.68 vs 82.56 +/- 4.97, P<0.01). The CD34 positive response intensity and the capillary density as well as VEGF and VEGFR-2 expressions in infarcted marginal zone in Group A were higher than those in Group B (P<0.01); but these parameters at aorta vessel walls were lower in Group A than in Group B (P<0.01).

CONCLUSIONSBP could advance the angiogenesis in the marginal zone of infarction, improve heart function, and embarrass angiogenesis in atherosclerotic plaque.

Animals ; Atherosclerosis ; physiopathology ; Drugs, Chinese Herbal ; pharmacology ; Male ; Myocardial Ischemia ; physiopathology ; Neovascularization, Pathologic ; physiopathology ; prevention & control ; Neovascularization, Physiologic ; drug effects ; Plaque, Atherosclerotic ; pathology ; physiopathology ; Rabbits ; Random Allocation ; Vascular Endothelial Growth Factor A ; metabolism ; Vascular Endothelial Growth Factor Receptor-2 ; metabolism

The study is aimed to understand the resource and the current situation of the use of Cibotii Rhizoma and provide the basis for protecting and utilization. The method of literature survey, field survey and quality assessment were applied in the study. The results showed that all the Cibotii Rhizoma came from wild resource and was mainly founded in Fujian, Guangxi, Guizhou, Yunnan, Guangdong, Hunan, Jiangxi, Sichuan, Chongqing, Zhejiang, etc. It contains over 5 000 000 kg in the area which total is about 7 000 hm2. The annual output is over 850 000 kg. At present, there is no cultivated resources. Based on the investigation and market sampling analysis from various regions, the results showed that the quality of the collected crude drugs conformed with the regulations of the Chinese pharmacopoeia. However the qualification rate of decoction pieces of Cibotii Rhizoma in market was only 56.4%. At present, the resource of Cibotii Rhizoma could meet the needs of medinal uses. It is important to protect the wild resource which is less and less because of the environmental factors. It also need to make a standard of processing method to ensure the safety, and solve quality problem of the decoction pieces.
China ; Conservation of Natural Resources ; Drugs, Chinese Herbal ; analysis ; Ferns ; chemistry ; growth & development ; Quality Control ; Rhizome ; chemistry ; growth & development

China ; Congresses as Topic ; Fatty Liver ; Humans

Objective To study molecular epidemiology and carbapenem-resistance mechanism of four Escherichia coli strains isolated from general surgery wards. Methods Antibiotic susceptibility was carried out by K-B gar diffusion and agar dilution methods. Carbapenemases were screened by three dimensional test and EDTA-Na_2-disk synergy test. Pulsed-field gel electropboresis (PFGE) was performed to analyze molecular epidemiology of isolates. Plasmid was extracted by using an alkalinelysis technique. Conjunction experiment, transformation assay, specific PCR and DNA sequencing were performed to confirm carbapenemase genotype and its transmission mechanism Results Four Escherichia coli isolates were resistant to most antimicrobials including carbapenem. PFGE showed that the four isolates belong to four different clonal strains. Specific PCR and DNA sequence analysis identified that carbapenem resistance in four clinical isolates was mediated by KPC-2 encoded on an approximately 56 000 bp plasmid, and this plasmid did not harbor aminoglycosides and fluorquinolones resistant genes. Conclusion Four Escherichia coli isolates with carbapenem resistance are obtained from our hospital, and KPC-2 plasmid is main cause of carbapenem resistance in these isolates.

Aim To study the mechanism of synergistic antitumor of EBB and doxorubicin in doxorubicin-resistant MCF-7/ADR breast carcinoma cells.Methods The antitumor activity of doxorubiein alone and its combination with EBB were measured by MTT assay in MCF-7/ADR and MCF-7cells. The rate of doxorubicin-induced apoptosis and the protein and mRNA levels of P-glycoprotein(P-gp) were determined in MCF-7/ADR treated with EBB by flow cytometry (FACS), respectively.Laser scanning confocal microscopy was used to detect the intracellular accumulation of drug in EBB-treated MCF-7 and MCF-7/ADR cells.Results EBB had antitumor effects for MCF-7 and MCF-7/ADR.It could potentiate the antitumor effect of dororubicin with CDI of 0.73 and 0.49 for MCF-7 and MCF-7/ADR,respectively.EBB and doxorubicin acted synergistically in elevating apoptosis of MCF-7/ADR and downregulating the expression of P-gp in a dose-dependent manner in MCF-7/ADR.EBB restored the intracellular accumulation of doxorubicin in MCF-7/ADR cells in a dose-dependent manner.After pretreatment with EBB for 24 h and 48 h,the intracellular accumulation of doxorubicin and Rh123 was obviousely restored in MCF-7/ADR cells compared with control in a time-dependent manner.Conclusion EBB is a potential agent which has strong inhibitory effect on both multidrug resistant cells and their parental cells.EBB can significantly potentiate the antitumor effects of dororubicin in MCF-7/ADR cells by blocking the function of P-glycoprotein and inhibiting the expression of P-glycoprotein.