Exposure to Radon and Kidney Cancer: A Systematic Review and Meta-analysis of Observational Epidemiological Studies / 生物医学与环境科学（英文）

OBJECTIVE@#To evaluate the possible association between radon exposure and kidney cancer.@*METHODS@#We performed a systematic review and a meta-analysis based on random effect models to provide a pooled association measure.@*RESULTS@#We subjected 8 studies (overall relative risks and 95% confidence intervals: 1.01, 0.72 to 1.43, I2 = 64.4%) to meta-analysis. Subgroup analysis revealed a marginally significant association between radon exposure and kidney cancer in studies conducted in Europe. Two population-based studies provided no evidence for the increased risk of kidney cancer in the general population.@*CONCLUSION@#The association between radon and kidney cancer remains unclear but cannot be excluded because of its biological plausibility and the limited number and quality of existing studies. Additional data from the general population and well-designed miner cohort studies are needed to reveal the real relationship between radon exposure and kidney cancer.

90d Exposure to Nonylphenol has Adverse Effects on the Spermatogenesis and Sperm Maturation of Adult Male Rats / 生物医学与环境科学（英文）

This study was conducted to elucidate the reproductive effect of NP on testis, epididymis and epididymal sperm in vivo. Adult male Sprague-Dawley rats were gavaged with NP at 0, 40, 100, or 250 mg/kg body weight (bw) on alternate days for 90 d. The results showed that oral administration of NP may damage the structure and function of testis, induce apoptosis and oxidative stress in epididymis or even have cytotoxic effects on epididymal sperm.

Analysis of immunophenotype characteristics in 109 cases of B lineage chronic B lymphoid leukemia / 中国实验血液学杂志

This study was aimed to investigate the immunophenotypic characteristics of 109 cases of B-cell chronic lymphoid leukemia (B-CLL) so as to provide evidences for the diagnosis and therapy of B-CLL, and for the detection of the minimal residual disease and its prognosis. Immunophenotyping was performed in 109 patients of B-CLL by two/three color multiparameter flow cytometry analysis using a panel of monoclonal antibodies. The results showed that in 109 cases of B-CLL, all cases expressed CD19, the positive ratios of other B lineage antigen such as CD20, CD22 and CD23 were 95.40%, 94.50%, 86.20% respectively. None of the B-CLL cases expressed CD10. The expression ratio of FMC-7 and CD38 in 105 cases of B-CLL were 28.60% and 36.20%. Among the B-CLL cases the CD5(+) cells amounted to 86.23%, CD5(-) cells amounted to 13.76%, ZAP-70 protein was expressed in 12 out of 50 patients. It is concluded that immunophenotypic data are very useful for the diagnosis and detection of minimal residual disease of B-CLL, and the relationship between the immunophenotypic characteristics and the prognosis of B-CLL needs further study.

Role of Bcl-xL in the cathepsin D-associated apoptosis of K562 cells / 中国实验血液学杂志

The purpose of study was to explore the possible functions of Bcl-xL in the glucosamine sulfate-induced apoptosis of chronic myeloid leukemia K562 cells. Light microscopy and Wright-Giemsa staining were used to investigate the morphologic evidences for apoptosis of K562 cells induced by glucosamine sulfate (GS); immunofluorescence was used to observe the translocation of cathepsin D and cytochrome C during the apoptosis; Western blot was performed to detect the expression of Bcl-xL, Bid, Bax in K562 cells treated by GS. The results showed that many vacuoles were observed in the cytoplasma of the K562 cells treated by GS; fluorescent signals of cathepsin D and cytochrome were fransformed from granules to disperse form by using immunofluorescence; the expression of Bcl-xL was found down-regulated in K562 cells treated by GS, but not in the cells pre-treated with pepstatin A; the significant changes were not detected in expression of Bax and Bid protein before or after apoptosis. It is concluded that Bcl-xL protein may mediate relationship between cathepsin D and mitochondia pathway, Cathepsin D may play an important role in the GS inducing apoptosis of K562 cells through downregulation of Bcl-xL expression.