Toxic Effects in Siganus oramin by dietary exposure to 4-tert-octylphenol

The integrated toxicities of 4-tert-octylphenol (t-OP) on Siganus oramin were investigated by dietary administration at doses of 5, 25 and 125 mg/kg body weight over 28 days. Significant increase was observed in the activity of hepatic glutathione S-transferase at 125 mg/kg on both day 14 and 28 in males, and at all doses on day 28 in females, and in hepatosomatic index at 25 mg/kg on day 14 in both sexes. Plasma levels of testosterone and cortisol decreased significantly at all doses on day 28. Histopathologic changes in liver, spleen, intestine and testis deteriorated with increasing doses and duration. The results suggest that S. oramin is sensitive to t-OP, and the above endpoints may be potential biomarkers for evaluating toxicities of environmental pollutants such as t-OP.

[Preventive effect of multi-glycoside of tripterygium Wilfordii Hook. f. on proteinuria and mesangial injury in experimental mesangial proliferative glomerulonephritis]

OBJECTIVE

To observe the preventive effect of multi-glycoside of Tripterygium Wilfordii Hook. f. (GYW) on proteinuria and mesentery injury in experimental mesangial proliferative glomerulonephritis in vivo.

METHODS

The reversible anti-Thyl.1 antibody glomerulo nephritis model of rats was established with monoclonal antibody 1-22-3 and intervened with GTW, and a control group was set up in the same time. Changes of 24h urinary protein excretion, serum creatinine (Scr), blood urea nitrogen (BUN), total plasma protein (TP) and glomerular morphology were observed, and the level of mRNA expression of proliferative factors, including platelet-derived growth factor-BB (PDGF-BB) and transforming growth factor-beta (TGF-beta), in renal tissue was determined.

RESULTS

GTW could inhibit proteinuria and mesangial injury in anti-Thyl. 1 antibody nephritis model. The PDGF-BB and TGF-beta mRNA expression in the anti-Thy1.1 antibody nephritis model rats were increased for 2.84 and 1.64 times respectively to those in the normal control group. GTW could down-regulate the over-expression of PDGF-BB mRNA by 33.1%, it was significantly different to that in the control group (P < 0.05).

CONCLUSION

GTW could reduce the proteinuria and inhibit mesangial cells proliferation and extracellular matrix deposition, these effects maybe related to the down-regulating of PDGF-BB mRNA expression.

[Quantitative study of P53 gene protein expression in the benign disease and cancer of breast]

P53 gene protein expression in breast benign disease and cancer was studied quantitatively using flow cytometry and cellular immunofluorescence staining technique. The results showed that P53 positive expression rate and content were lower in the benign disease of breast than that of the breast cancer. The content of P53 protein expression was also associated with the DNA ploidy in breast cancer. The content of P53 protein expression was higher in tumors with aneuploid cells than those with the diploid ones. The five year survival rate were also lower in P53 protein expression positive cases than the P53 negative one's.