Caracterização citomorfológica do tumor venéreo transmissível canino correlacionada com danos citogenéticos, taxa de proliferação e resposta clínica à quimioterapia
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Data
2005
Autores
Gaspar, Luiz Fernando Jantzen [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
No presente trabalho foram avaliadas 152 massas neoplásicas de tumor venéreo transmissível procedentes do Hospital Veterinário da FMVZ-UNESP e do Biotério central da UNESP (campus Botucatu), no período de março de 2002 a setembro de 2004. As preparações citológicas foram coradas pelo método de Giemsa e, segundo critérios estabelecidos, foram divididos em três tipos citomorfológicos: linfocitóide, misto e plasmocitóide. Posteriormente, foram reagrupadas de acordo com comportamento biológico em primárias e não primárias. O objetivo foi identificar e comparar anormalidades nucleares (binucleação, multinucleação, brotamento, lobulação e micronucleação), avaliar parâmetros citomorfométricos através da técnica da CEC (concentração eletrolítica critica), determinar a taxa de proliferação mediante a imunomarcação com o Ki-67 (MIB-1) e com a quantificação das AgNORs, observar a expressão da glicoproteína-p, avaliar a resposta clínica à quimioterapia, bem como, relacionar esta resposta com a expressão de glicoproteína-p. Foi observada maior freqüência das lobulações nucleares no tipo plasmocitóide. A área do nucléolo e a relação nucléolo/núcleo foram maiores nas massas primárias. O Ki-67 (MBI-1) apresentou maior taxa de marcação (positividade) no tipo plasmocitóide e nas neoplasias não primárias. A média de pontos das AgNORs foi maior no tipo linfocitóide em relação aos outros dois tipos. O tipo plasmocitóide e o grupo das neoplasias não primárias tiveram um percentual de marcação da glicoproteína-p maior em relação aos outros grupos. Os tumores do grupo plasmocitóide tiveram um maior percentual de resposta parcial à terapia do que os outros grupos, enquanto os tipos linfocitóde tiveram um maior percentual de resposta completa. Os casos com resposta clínica parcial à quimioterapia apresentaram um... .
In this study were evaluated 137 neoplastic masses of transmissible venereal tumor from clinical attendance at the Veterinary Hospital and Central biotery of UNESP (Botucatu campus), between March 2002 and September 2004. The cytological samples were stained by the Giemsa method and, by preestablished criteria, divided into three cytomorphological patterns: lymphocyte-like, plasma cell-like and mixed. Then, They were regrouped by biological behavior as primary or non-primary (metastatic or recurrent). The aim of the present work was to identify and compare nuclear abnormalities occurrence (binucleation, multinucleation, nuclear buds, nuclear lobulation and micronucleation), to evaluate cytomorphometric parameters by the critical electrolyte concentration (CEC) technique, to determinate proliferation ratio by immunoreaction with Ki-67 (MIB-1) antibody and AgNOR quantification. Additionally, the immunolabelling with p-glycoprotein antibody, and the clinical response to chemotherapy, were evaluated and correlated. The results showed a higher frequency of nuclear lobulation in the plasma-cell-like pattern. The nucleolus area and nucleolus: nucleus ratio were greater in primary masses. The proliferative index measured by Ki-67 immunocytochemistry was most elevated in the plasma-cell-like and not primary tumors. The AgNOR point average was highest in lymphocyte-like patterns. The expression of p-glycoprotein was highest in plasma-cell-like and non-primary masses than in the others. Similarly, the plasma-cell-like group showed a larger partial response to chemotherapy than the other two patterns, although the lymphocyte-like group presented the largest percentage of complete response. The association between p-glycoprotein expression and clinical response revealed that with the partial response had greater p-glycoprotein expressions than the total response... (Complete abstract, click electronic address below).
In this study were evaluated 137 neoplastic masses of transmissible venereal tumor from clinical attendance at the Veterinary Hospital and Central biotery of UNESP (Botucatu campus), between March 2002 and September 2004. The cytological samples were stained by the Giemsa method and, by preestablished criteria, divided into three cytomorphological patterns: lymphocyte-like, plasma cell-like and mixed. Then, They were regrouped by biological behavior as primary or non-primary (metastatic or recurrent). The aim of the present work was to identify and compare nuclear abnormalities occurrence (binucleation, multinucleation, nuclear buds, nuclear lobulation and micronucleation), to evaluate cytomorphometric parameters by the critical electrolyte concentration (CEC) technique, to determinate proliferation ratio by immunoreaction with Ki-67 (MIB-1) antibody and AgNOR quantification. Additionally, the immunolabelling with p-glycoprotein antibody, and the clinical response to chemotherapy, were evaluated and correlated. The results showed a higher frequency of nuclear lobulation in the plasma-cell-like pattern. The nucleolus area and nucleolus: nucleus ratio were greater in primary masses. The proliferative index measured by Ki-67 immunocytochemistry was most elevated in the plasma-cell-like and not primary tumors. The AgNOR point average was highest in lymphocyte-like patterns. The expression of p-glycoprotein was highest in plasma-cell-like and non-primary masses than in the others. Similarly, the plasma-cell-like group showed a larger partial response to chemotherapy than the other two patterns, although the lymphocyte-like group presented the largest percentage of complete response. The association between p-glycoprotein expression and clinical response revealed that with the partial response had greater p-glycoprotein expressions than the total response... (Complete abstract, click electronic address below).
Descrição
Palavras-chave
Cancer em cão, Cão - Doenças, Cão - Aparelho genital - Tumores
Como citar
GASPAR, Luiz Fernando Jantzen. Caracterização citomorfológica do tumor venéreo transmissível canino correlacionada com danos citogenéticos, taxa de proliferação e resposta clínica à quimioterapia. 2005. 143 f. Tese (doutorado) - Universidade Estadual Paulista, Faculdade de Medicina Veterinária e Zootecnica, 2005.