In the occupational production and the daily life,the pollutant of pesticides may enter our bodies through the skincontact,the breath and the gastrointestinal absorption and so on. It may cause the reproductive organ and the spermatogenic cell damaged,abnormal endocrine function and the reproduction related genes expressed abnormally,resulting to abnormal spermatogenesis,which leads to oligospermia,asthenospermia,teratospermia and azoospermia. In order to look for a normal pattern and investigate the intrinsic mechanism of the cytotoxicity to the spermatogenic cell correlated with the pesticide pollution,it is necessary to review the relationship between the toxicity of pesticide pollutant and the abnormity of male spermatogenic cell,which will provide some basic information for preventing and controlling the reproductive toxicity of pesticides and ensuring the reproduction healthy of people.

Xiamen Cardiovascular Hospital set up the first chest-pain center in Fujian province,and launched the first citywide regional chest pain network in China.Their experiences prove that the first-aid network can effectively integrate ambulances,primary hospitals,general hospitals,and special hospitals for seamless connection between EMS and in-house rescue.These efforts can minimize the mortality and disabilities of myocardial infarction,effectively elevating the myocardial infarction treatment efficiency and capabilities of the region.

OBJECTIVE To investigate the effect of clopidogrel(Clog),a platelet aggregation inhibitor,on the development of colitis-associated colon cancer(CAC)and its possible mechanism. METHODS To establish a CAC model,male BALB/c mice were treated with single azoxymethane(AOM) 10 mg · kg-1 by ip. One week later,the mice drank 2.5% dextran sulfate sodium(DSS)for one week and water for two weeks,which lasted three cycles. From the first day mice received 2.5%DSS water, Clog 12.5,25.0 and 50.0 mg · kg-1 was ig administered once a day. Body mass,clinical symptoms,the number of colon tumor and tumor size in colon tissue were recorded. Hyperplasia of tumors was analyzed by HE staining. In the early inflammatory phase of the CAC model,the length of colons was measured, histological structure and epithelium cell proliferation of colon tissues were evaluated by HE staining and Ki67 staining,respectively. In the tumorigenesis and progression phase of the CAC model,epithe?lium cell proliferation of colon tissues was evaluated by Ki67 staining. The mRNA expression of tumor necrosis factor-α(TNF-α)was detected by real-time quantitative PCR. The expression of chemokine(C-X-C motif)ligand 2(CXCL2)and its receptor 2(CXCR2)in colon tissues was detected by PCR and immu?nohistochemistry. RESULTS Compared with model group,clinical symptoms of mice in Clog 12.5 mg · kg-1 group were alleviated,the size of colon tumors was decreased(P<0.05),and hyperplasia of tumors was reduced(P<0.05). During the inflammatory phase,the clinical symptoms of mice in Clog 12.5 mg·kg-1 group were significantly alleviated(P<0.05),the decrease of body mass was reduced(P<0.01),the colon shrinkage was ameliorated(P<0.01),the inflammatory injury and epithelium cell proliferation in colon tissues were reduced(P<0.05). During the tumorigenesis and progression phase,epithelium cell prolif?eration in colon tissues in Clog 12.5 mg·kg-1 group was reduced(P<0.01),and the mRNA and protein expression of TNF-α,CXCL2 and CXCR2 of colon tissues was decreased(P<0.05). CONCLUSION Clog can alleviate inflammation during the CAC early inflammatory phase and inhibit the formation of CAC. The antitumor effect of Clog may be related to the decrease in expression of CXCL2 and CXCR2.