Aspectos histológicos de fragmentos esplênicos autotransplantados em ratos

INFLUENCE OF SPLENIC IMPLANTS IN THE SUBCUTANEOUS TISSUE ON ASPLENIC ANIMALS SURVIVAL

Background:

The best site for splenic implant was not defined, mainly evaluating the functionality of the implant.

Aim:

To evaluate the effects of autogenous splenic implantation on the subcutaneous tissue in the survival of splenectomized rats.

Method:

Twenty-one randomly assigned rats were studied in three groups (n=7): group 1 - manipulation of the abdominal cavity and preservation of the spleen; group 2 - total splenectomy; group 3 - splenectomy and implant of the tissue removed in the subcutaneous. The animals were followed for 90 days postoperatively.

Results:

There was a higher mortality in groups 2 (p=0.0072) and 3 (p=0.0172) in relation to group 1. There was no difference between groups 2 and 3 (p=0.9817).

Conclusion:

The splenic implant in the subcutaneous is ineffective in the survival of rats submitted to splenectomy.

Histological aspects of autologous transplantation of different fragments of the spleen in rats

PURPOSE

To evaluate macro and microscopically the evolution of autotransplants of fragments of spleen different fragments in the greater omentum, after eight weeks of observation.

METHODS

Twenty rats Wistar were used, males and adults, submitted to total splenectomy and divided in two groups. The group I - ten animals with implant of spleen fragment (25% weight of spleen) in the omentum; and group II - ten animals with implant of spleen fragment (30% weight of spleen) in the omentum. It was analyzed macro and microscopically the evolution of the implant.

RESULTS

It was observed adherences to the adjacent tissues and vascularization in all of the fragments transplanted. The group I and II presented white pulp with follicular formations and lymphoid tissue preserved, and the red pulp in cordon aspect. The group II presented white pulp more disorganized and red pulp hemorrhagic. The active macrophages were observed in the group I and II.

CONCLUSION

The splenic autotransplantation of the group I showed better regeneration.