Imunossupressão com tacrolimus favorece a regeneração hepática induzida por hepatectomia ampla em ratos

Analysis of the histology of the scar bladder and biochemical parameters of rats with a solitary kidney undergoing immunosuppression with tacrolimus

PURPOSE

To evaluate bladder histology in healing and biochemical analysis of rats with single kidney in ischemia/reperfusion, treated with tacrolimus.

METHODS

Fifty rats randomized into five groups. Three rats died in surgery, 47 rats divided in groups: Control (non-operated, n=10), Sham (operated without drugs, n=8), T1 (operated + tacrolimus 1mg/kg, n=10), T2 (operated + tacrolimus 0.1 mg/kg, n=10), T3 (operated + tacrolimus 10mg/kg, n=9). The surgery was: laparotomy, right nephrectomy, left kidney ischemia/reperfusion, cystotomy followed by bladder suture. After that, rats were submited to gavage daily (Control and Sham with saline solution. T1, T2, T3 with tacrolimus in doses already mentioned). On the 14th day, after death induction, cystectomy was performed and bladder was histologicaly analysed. The serum urea, creatinine and tacrolimus were analysed too.

RESULTS

There was difference in serum tacrolimus in T3 compared to the other groups (p<0.05). There was higher doses of creatinine in T3 group and higher urea in groups with tacrolimus. There were significant differences among all histologic variables comparing groups with and without tacrolimus (p<0.05).

CONCLUSION

Tacrolimus associated with ischemia/reperfusion is nephrotoxic, suppresses inflammation and seems to delay the healing bladder.

Proliferative effect of aqueous extract of Hyptis fructicosa on liver regeneration after partial hepatectomy in rats

PURPOSE

To evaluate the effect of aqueous extract of Hyptis fructicosa on hepatic regeneration after partial hepatectomy in rats.

METHODS

Sixteen rats were divided in two groups: C (Control Group) and HF (Whose rats received aqueous extract of Hyptis fructicosa during 4 days using the dose of 100 mg/kg/day). On the consecutive day of this treatment, the animals of both groups underwent hepatectomy of about 67% of liver. Twenty four hours later, they were sacrificed, and the remaining mass of liver was removed and prepared to be studied through the PCNA immunohistochemical technique.

RESULTS

The liver regeneration index of HF group was 53.56 ± 18.91%, while in C group was 21.12 ± 8.29% (p=0.0003).

CONCLUSION

These results show that the administration of aqueous extract of Hyptis fructicosa using the dose of 100mg/kg/day increased the hepatocyte proliferation in the group HF.