Detection of apoptosis genes differentially expressed in patients with different degrees of benzene poisoning by cDNA microarray / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To investigate the differential expression of apoptosis genes in patients with different degrees of benzene poisoning by cDNA microarray.</p><p><b>METHODS</b>Peripheral mononuclear cells were isolated from seven patients with benzene poisoning of different degrees (suspected 1 case, moderate 2, severe 2), and seven age and sex matched normal control subjects. Total RNA was extracted and purified, followed by reverse transcription to cDNAs with concomitant incorporation of fluorescent dCTP (Cy3 or Cy5). Then 177 genes associated with cell apoptosis were hybridized against the cDNAs probes in microarray. Fluorescent signals were scanned to detect apoptosis genes differentially expressed in patients and normal subjects.</p><p><b>RESULTS</b>Forty one genes were found to be differentially expressed between benzene-poisoned patients and normal controls; among the 41 genes, three were up-regulated among patients with mild to moderate degrees of benzene poisoning and one up-regulated among all patients. The total amount of differentially expressed genes of apoptosis decreased with the aggravation of benzene poisoning.</p><p><b>CONCLUSIONS</b>Differential expression of apoptosis genes was found in patients with benzene poisoning, suggesting a role of altered apoptosis in benzene-induced hematotoxicity.</p>

Analysis on tumor related gene expression profiles in benzene poisoning using cDNA microarray / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To detect target genes for further study by way of analyzing the gene expression profiles of benzene poisoning by using cDNA microarray.</p><p><b>METHODS</b>Peripheral mononuclear cells were isolated from seven patients with benzene poisoning of different degrees, and sevene age-and sex-matched normal subjects. Total RNA was extracted and purified, followed by revese transcription to cDNAs with concomitant incorporation of fluorescent dCTP (Cy3 or Cy5). The cDNAs were used as probes in microarray of 2780 cloned cDNA. Fluorescent signals were scanned to detect genes differentially expressed in patients and normal subjects.</p><p><b>RESULTS</b>Among 7 pieces of cDNA microarray of 2780 tumour related genes, the expression of 16 genes, such as GRO1, TGFBR3, LYN ctc was upregulated, whereas the expression of 28 genes, such as FOSB, DJ-1, MCT-1 etc was down-regulated.</p><p><b>CONCLUSION</b>Abnormal expression of tumour related genes of patients exposed to benzene suggests that they may be the key genes, which play important role in benzene-induced leucocythemia. cDNA microarray technique is useful to indicate the expression mode of benzene poisoning tumour related genes, and to find rapidly and effectively new research object and the way of gene therapy.</p>

Effects of Coal Burning Related Endemic Fluorosis on Body Development and Intelligence Levels of Children / 实用儿科临床杂志

Objective To study the effects of coal burning related endemic fluorosis on body development and intelligence levels of fluorosic children in Zhijin county.Methods One hundred and seventy-six fluorosic children and 50 healthy(without fluorostic teeth) children aging 7-12 years who were sampled in cluster sampling were examined for urine fluorosis,physical examination and intelligence tests in Zhijin county,with coal burning pollution related fluorosis.Results Physical development of sick children and the children in control group were in low levels. The intelligence levels and the leves of urine fluorosis in study group were lower than those in control group and there was a significant difference(P

Effects of Methylmercury on Behavioral Teratogenesis of Rats / 实用儿科临床杂志

Objective To study the effect of methylmercury on the behavioral teratogenesis in filial r ats.Method Pregnant rats were injected intra-abdominally with 0 ,0.75,1.50,3.00 mg/kg methylmercury every other day,then early physiological fun ctions and behavioral functions of their filial rats were observed. Results The results indicated that when impregnated female ra ts were heavily exposed to methylmercury, early physiological development and be havioral development of their filial rats were retarded.Conclusion The methylmercury likely has the effect on behavioral teratogenesis of rats. J Appl Clin Pediatr,2005,20(2):153-155