PURPOSE:To evaluate the influence of the cyclosporine in liver regeneration in rats submitted to an experimental model of 70% hepatectomy.METHODS: Forty male rats were randomly divided in four subgroups (C.24h, C.7d, E.24h, E.7d), according to the drug used and the day of sacrifice (24 hours and 7 days). Cyclosporine (10mg/Kg/day) was given to the study subgroup and 1 ml of 0.9% sodium chloride was to the control subgroup. Resection of left lateral lobe and median lobe performing 70% of liver mass. During the animals' death, KWON formula was applied. Counting of mitotic figures and percentage of positive nucleus with PCNA and Ki-67 were evaluated.RESULTS: In the 2nd, 4th PO and death days, E.7d lose more weight than C.7d. Regarding to the KWON formula, the C.7d regenerated more than the C.24h and the same with the E.7d. Comparing between the groups, only E7d subgroup was statistically significant compared with C.7d, showing the stimulating effect of cyclosporine in liver regeneration. Immunohistochemestry had significant results between the study subgroups. The mitotic index revealed statistical differences in the control subgroups.CONCLUSION:Cyclosporine, in spite of being an immunosuppressive drug, has a positive effect in liver regeneration, although reduce the animal's body weight.

A fixação dos enxertos de pele total através da sutura demanda tempo cirúrgico relativamente longo. O surgimento de adesivos teciduais tem se apresentado com várias aplicações clínicas, constituindo alternativa à sutura convencional. O objetivo deste estudo é avaliar a eficácia do adesivo 2-octilcianoacrilato, quando comparado à sutura simples, na fixação de enxertos de pele total, analisando-se a integração do enxerto. Foram retirados enxertos de pele total de 1 cm², bilateralmente, do dorso de nove ratos machos, com peso médio de 150 gramas. A pele retirada para a enxertia foi recolocada sobre o defeito, a fixação foi realizada através de sutura contínua com fio monofilamentar de náilon 4-0 no lado esquerdo e adesivo de 2-octilcianoacrilato no lado direito. Os aspectos clínico e histológico da integração do enxerto foram analisados no 7º e 14º dia de pós operatório. Utilizou-se o software Sens-a-Ray para comparação de resultados. Evidenciamos maior integração do enxerto de pele total no lado do adesivo de 2-octilcianoacrilato (80%) em comparação ao lado da sutura contínua (44%), sendo que houve perda total do enxerto do lado da cola de 2-octilcianoacrilato em 11,1% do casos comparado a 33,3% da sutura contínua. O tempo médio da fixação do enxerto no grupo da cola de 2-octilcianoacrilato foi de 23 segundos, contra 4 minutos da sutura convencional. Foi demonstrado uma maior integração e um menor tempo de fixação do enxerto no grupo do adesivo 2- octilcianoacrilato.

Fixation of full thickness skin grafts by suture takes a long operative time. The development of tissue adhesives became an alternative for conventional suture. The aim of this study is to evaluate the efficacy of octyl-2-cyanocrylate in graft integration, compared to conventional suture in full thickness skin grafting. Two 1 cm² skin grafts were obtained billaterally from the back of 9 male rats, and then fixated over the defect, with nylon 4.0 suture in the left side( SC group ) and octyl-2-cyanocrylate ( AT group ) in the right side. Clinical and histologic aspects of graft integration were analised in 7º and 14º postoperative day. Sens-a Ray software was used to compare the results. Results revealed better graft integration in AT group (80%) than SC group (44%), with 11,1% of total graft loss in AT group and 33,3% in SC group. The mean time for fixation was 23 seconds in AT group and 4 minutes in SC group. It was showed a better graft integration and a faster fixation time in AT group.