ABSTRACT
 Many systemic factors may influence the healing process. The present study aimed to analyze histological modifications induced by the presence of Ehrlich ascites tumors on laparotomic surgical scars in BALB/c mice. A total of 52 mice were used. Half of the mice were injected with Ehrlich tumor cells, and 7 days later (day 7) all mice underwent laparotomy. On day 11, the scar was resected in 10 mice with the tumor and in the 10 control mice. The procedure was repeated on day 14 with the remaining animals. The scar tissue was histologically evaluated by means of semiquantitative analysis for acute inflammation, re-epithelization, formation of granulation tissue, chronic inflammation, fibroblast proliferation, and collagenization. Mice injected with tumor cells gained weight due to ascites growth. Histologic results showed that Ehrlich ascites tumor cells did not affect initial acute inflammation, re-epithelization, and formation of granulation tissue (P = ns). Chronic inflammation and fibroblast proliferation were, however, significantly decreased in mice with tumors, whereas collagenization had increased (P = 0.001). These results show that Ehrlich ascites tumors affect the healing process in mice. Despite a decrease in chronic inflammation and fibroblast activity, scars in these animals had more collagen, were more fibrous, and were better organized. .
ABSTRACT
Introdução: As alterações histológicas renais encontráveis no paciente com Diabetes Mellitus do tipo 2 (DM2) ainda não estão bem estabelecidas, comoo foram aquelas do diabetes tipo l. Acreditamos que esse fato se deve, em parte, à indicação de biópsia renal em DM2 que se restringe aos casos commanifestações clínicas atípicas, como proteinúria nefrótica, função renal comprometida sem retinopatia ou rápida progressão para insuficiência renal.Objetivos: Descrever as alterações da histologia renal presentes em pacientes diabéticos tipo 2 submetidos à necrópsia após óbito por qualquer causa.Métodos: Análise histológica renal pela microscopia comum de 61 rins de humanos diabéticos necropsiados num período de dez anos (janeiro de 1994 ajaneiro de 2004), no Hospital Universitário em Londrina-PR. Resultados: Dos 61 casos analisados, a glomeruloesclerose diabética clássica, comproliferação nodular, se fez presente em tão somente 49,2%, encontrando-se doença glomerular superimposta à glomeruloesclerose diabética em 6,6%,alterações crônicas com predomínio vascular em 13,1% e outra doença glomerular isolada em 31,1%. Discussão: À semelhança de nossos resultados,em três outros estudos também nos rins obtidos por necrópsias em DM2 houve predomínio da nefroesclerose diabética, por vezes associada a outraspatologias renais. Em nosso material de estudo, 44,2% dos casos apresentavam lesão não diabética composta por outra glomerulopatia em 31,1% enefroesclerose hipertensiva em 13,1%. Conclusões: A análise histológica de rins de pacientes com DM2, obtida por necrópsia, encontra-se emconsonância com os dados da literatura mundial. A biópsia renal em diabéticos com nefropatia certamente permitirá reconhecer, nesse contexto, patologiaseventualmente curáveis.
Background: The structural lesions associated with the signs and symptoms of renal disease in type 2 diabetes mellitus are not as well defined as thoseof type 1; the literature refers to findings other than the typical glomerulosclerosis, but the true prevalence of lesions remains to be established. In general,there is a restrictive biopsy policy in the diabetic patient, indicated only in the presence of heavy proteinuria or renal dysfunction with the absence of retinalchanges. Methods: in the department of pathology of our University Hospital we examined by light microscopy the renal tissue of 61 diabetic type 2 patientswho died from different causes to assess the presence and type of renal changes. Results: 30/61 (49.2%) of the patients had classical diabeticglomerulosclerosis; concomitant diabetic lesion and glomerulonephritis was present in 6.6%;isolated glomerulonephritis in 31.1% and predominant vasculardamage in 1.,1%. Discussion: In our study as well as in three other published studies regarding renal autopsy findings of type 2 diabetic patients, almosthalf of the cases presented a non- classic diabetic glomerular lesion and was represented by hypertensive nephrosclerosis or a potentially curableglomerulonephritis. Conclusions: Our findings with respect to the autopsied diabetic type 2 renal histology are in accordance with the medical literature.Prospectively unrestricted kidney biopsy of type 2 diabetic patients should be stimulated to establish the causes of the renal dysfunction and find treatablelesions, thus enabling us to prevent deterioration is some cases.
