tailieunhanh - Expression of biomarkers in canine mammary tumours

Biomarkers identifiable in tumours have potential use in early diagnosis, staging, prognosis and assessment of response to therapy. This paper describes the immunohistochemical expression of a few reliable biomarkers in post surgical canine mammary gland tumour (CMGT). Immunohistochemical expression of biomarkers in canine mammary tumours was carried out in forty three mammectomised tissue samples. The intensity and distribution of immunostaining of the biomarkers in histological types of CMGT was studied. PCNA showed weak nuclear staining in benign tumour and strong nuclear staining in malignant tumours. Bcl 2 showed weak cytoplasmic staining in benign tumours and moderate cytoplasmic staining in 10-20% of epithelial cells in malignant tumours. Cytokeratin 8/18 expression was strong in >50% of epithelial cells in benign and malignant tumours. Vimentin expression was specific with strong cytoplasmic staining in the stromal fibrous tissue, stromal fusiform cells, myoepithelial cells in tubules, spindle cells, chondroid tissue and lipocytes. CEA expression was negative in benign tumours. Malignant tumours expressed moderate membranous to cytoplasmic staining in 10-20% of luminal epithelial cells. MUC 1 expression was weak membranous staining in | EXCELLENT PUBLISHERS International Journal of Current Microbiology andAppliedSciences ISSN 2319-7706 Volume 8 Number 05 2019 Journal homepage http Original Research Article https Expression of Biomarkers in Canine Mammary Tumours N. Muniappan S. Ramesh S. Hemalatha Mohamed Shafiuzama and . Preetha Department of Veterinary Pharmacology and Toxicology Madras Veterinary College Chennai-7 Tamil Nadu Veterinary and Animal Sciences University India Corresponding author ABSTRACT Keywords Canine mammary tumours Biomarkers immnuno histochemistry Article Info Accepted 12 April 2019 Available Online 10 May 2019 Biomarkers identifiable in tumours have potential use in early diagnosis staging prognosis and assessment of response to therapy. This paper describes the immunohistochemical expression of a few reliable biomarkers in post surgical canine mammary gland tumour CMGT . Immunohistochemical expression of biomarkers in canine mammary tumours was carried out in forty three mammectomised tissue samples. The intensity and distribution of immunostaining of the biomarkers in histological types of CMGT was studied. PCNA showed weak nuclear staining in benign tumour and strong nuclear staining in malignant tumours. Bcl 2 showed weak cytoplasmic staining in benign tumours and moderate cytoplasmic staining in 10-20 of epithelial cells in malignant tumours. Cytokeratin 8 18 expression was strong in 50 of epithelial cells in benign and malignant tumours. Vimentin expression was specific with strong cytoplasmic staining in the stromal fibrous tissue stromal fusiform cells myoepithelial cells in tubules spindle cells chondroid tissue and lipocytes. CEA expression was negative in benign tumours. Malignant tumours expressed moderate membranous to cytoplasmic staining in 10-20 of luminal epithelial cells. MUC 1 expression was weak membranous staining in 10 of apical portion of luminal epithelial cells in benign tumours. Overexpression .

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