Detection of the Ki-67 Proliferation Associated Nuclear Epitope in Normal Canine Tissues Using the Monoclonal Antibody MIB-1
1998
Summary
This report describes the immunohistochemical detection of the Ki-67 proliferation associated nuclear epitope by means of the MIB-1 monoclonal antibody (mAb) in paraffin tissue sections from nine samples of 16 tissues obtained from nine dogs. Three parameters were considered: the localization of the cells expressing the Ki-67 epitope, the cytological characteristics of the Ki-67 expression, and the proliferative activity of some of the tissues measured by means of the proliferative index (percentage of Ki-67 positive cells measured on 500 and 1000 cells). The MIB-1 mAb reacts with the nuclei of proliferating cells, as in humans. The proliferative index was far from representative, but we were able to give a range of values concerning the proliferative activity of normal tissues. This study serves as a basis for the expression of the Ki-67 antigen by normal canine tissues in order to visualize the proliferative compartments and, thus, allows its application as a proliferative marker in routine veterinarian histopathology.
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