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Objective To analyze mutations in the Wilms tumor gene (WT1) in Ieukemogenesis.Methods WT1 gene in peripheral blood was determined by PRC-SSCP technique,in 32 cases of acute leukemia,included 9 cases of acute granulocytic leukemia,8 cases of chronic granulocytic leukemia(mean age-33 years) and 16 specimens of normal subjects were also detected.Results Mutations in the WT1 gene in 3 of 32 leukemias were found .WT1 mutations were found in 11% of cases of acute lymphoblastic leukemia and in 13% of cases of acute myeloid leukemia,in which they were associtated with a poor response to chemotherapy.Conclusions The mutations in Wilms tumor gene WT1 are associated with leukemogenesis and its therapy,which WT1 transcripts may prove a significant tumor marker, as a MRD monitor in evaluating remission status and early relapse,and may be useful in prognosis of acute leukemia.
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Objective To observe the influence of standardized deep well water on mortality and morbidity of esophageal cancer (EC) in Linzhou. In order to test the hypothesis of "nitrogenous compound metabolised cycling" in etiology of EC. Methods Based on the investigation data collected in 1999 among which some data were from Linzhou Institute of Prevention and Treatment of EC. Three kinds of water were included, standardized deep well water(SDWW) from the well with the depth exceeding 100 meters ,finished time exceeding 6 years; unstandardized deep well water(UDWW) and mountain spring water(MSW). The mortality and morbidity of EC in the the related population. Results There were 281 458 villagers of 165 villages to drink SDWW, 183 289 villagers of 129 villages to drink UDWW and 45 274 villagers of 50 villages to drink MSW. The morbidity and mortality of EC significantly decreased in residents who drank the SDWW compared with those who drank the UDWW and MSW, P
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Objective To study the effects of industrial wastewater containing chromium from Anyang Bicycle Works (ABW) on the mutagenicity of ground water and drinking water. Methods The ground water samples were collected from wells located on the southwest of the pollution source of ABW, near the gate of ABW(A) and at a distance of 60 m from the east of ABW(B) respectively, and also from the following sampling points closely located along the lower reach of sewage ditch: cigarette work(C), iron alloy works(D), match works(E), chemical and chemical fiber works(F). The raw water and finished water samples were collected from water plant. The contents of chromium(Cr6+) in water samples were measured and the mutagenicity of the water samples were tested by Vicia faba root tips cell micronucleus test. Results The contents of Cr6+ in ground water samples showed a decreaseing trend (0.358 5-0.010 0 mg/L) with the increasing distances from the sampling points to the pollution source of ABW, the order of which was the following: A, B, C, D, E, F. The contents of Cr6+ in ground water samples collected from the gate of ABW and the location at a distance of 60 m from the east of ABW exceeded the related standard 6.17 and 2.08 times respectively.The contents of Cr6+ in raw water and finished water samples were 0.0123 and 0.0095mg/L respectively.All of the water samples except that from the chemical and chemical fiber works showed higher micronucleus rates in different degree compared with that of negative control. Statistically significant higher micronucleus rate was only observed in water sample from match works compared with that of negative control (P