Avaliação hematológica e imunofenotípica de cães com linfoma

Abstract

Considerando a importância da origem celular do linfoma e as alteragOes decorrentes da evolugäo desta neoplasia e aquelas ocorridas corn o emprego da quimioterapia, avaliaram-se 27 câes corn diagnOstico de linfoma, que foram submetidos indugäo da remiss5o, corn o protocolo de Madison-Wisconsin. No momento do diagnOstico e uma semana apOs cada uma das oito sessOes quimioterapicas, realizou-se hemograma e analise citomètrica das subpopulagOes linfocitarias CD5+CD4+, CD5+CD8+ e CD45+CD21+ no sangue periferico e, na medula Ossea as avaliagOes foram realizadas antes e apOs o tratamento. Observou-se um major nOmero de animais machos, das ragas Rottweiler e sem raga definida, de meia idade e grande porte, que apresentaram com major freqUéricia, linfoma multicêntrico em estadio Vb. Com relagäo a origem celular do linfoma, notou-se predominancian de linfoma B. No eritrograma, observou-se anemia normocitca normocrOmica na maioria dos animais durante todo o tratamento. No leucograma, notou-se em alguns animais, no momento do diagnOstico, a presenga de leucocitose por neutrofilia. Alem disso, houve uma consideravel deplegâo de linfOcitos no sangue circulante, assim como das subpopulagOes CD5+CD8+ e CD45+CD21+, durante todo o tratamento e, observou¬se tambem, com menor intensidade, uma deplegäo da subpopulagâo CD5+CD4+. Na medula Ossea observou-se deplegâo da subpopulagäo CD45+CD21+. Assim, a imunidade humoral e imunidade mediada por calulas ficam prejudicadas corn a evolugao do linfoma e corn o emprego da quimioterapia.

Considering the importance of the lymphoma cellular origin and the decurrent alterations of the evolution of this neoplasia and those occured ones with the chemotherapy, was evaluated 27 dogs with diagnosis of lymphoma. that they were submitted to the induction of remission, with the protocol of Madison-Wisconsin. At the moment of the diagnosis and one week after each one of the eight chemotherapic sessions, became fullfilled hemogram and citometric analysis of CD5+CD4+, CD5+CD8+ e CD45+CD21+ lymphocyte subpopulations in peripheral blood and, bone marrow evaluations were carried through before and after the treatment. Was observed a bigger number of male animals, Rottweiler breeder and without defined race, of half age and big tall, that had presented more frequently, multicentric lymphoma in Vb stage. With regard to the lymphoma cellular origin, the B cell lymphoma was noticed. In the eritrogram, was observed in the majority of the animals anemia normocitic normocromic during the treatment. In the leucogram, was noticed in some animals, at the moment of the diagnosis, the presence of leukocitosis with neutrofilia. Moreover, had a considerable depletion of lymphocytes in circulating blood, as well as of CD5+CD8+ e CD45+CD21+ subpopulations, during all the treatment and, it was also observed , with lesser intensity, a depletion of CD5+CD4+ subpopulation. In the bone marrow was observed depletion of CD45 +CD21+ subpopulation. Thus, the humoral immunity and immunity mediated for cells are harmed with the evolution of lymphoma and the use of chemotherapy.