Evaluation of immunoreactivity of normal tissues from dogs, using monoclonal antibody B72.3
1994
Clemo, F.A.S. | DeNicola, D.B. | Zimmerman, J.L.
Monoclonal antibody (MAB) B72.3, which recognizes human tumor-associated glycoprotein-72, has immunoreactivity for malignant epithelial neoplasms in human beings and dogs. To further characterize the range of immunoreactivity of MAB B72.3 in canine tissues, MAB B72.3 and 2 other tumor-associated glycoprotein-72 antibodies (MAB CC49 and CC83) were tested against a wide spectrum of normal tissues from dogs. Immunoreactivity was detected, using an avidin-biotin-complex immunoperoxidase method. Monoclonal antibody B72.3 did not stain most types of normal canine tissues, but various types of epithelial cells within the gastrointestinal and respiratory tract mucosae, salivary gland, esophagus, epididymis, uterus, thymus, hair follicle, and apocrine glands of the anal sac had variable staining with MAB B72.3. A similar range of immunoreactivity in comparable types of normal tissues was seen for MAB CC49 and CC83; however, MAB CC49, but not MAB B72.3 and CC83, stained the endothelium of capillaries and small vessels in most normal tissues. Staining of frozen and paraffin-embedded tissues was similar. In conclusion, we found that MAB B72.3, CC49, and CC83 had selected immunoreactivity for specific types of normal canine epithelial cells, especially those involved with mucin production.
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