Document Detail

Quantitative analysis of telomerase in feline mammary tissues.
MedLine Citation:
PMID:  19407092     Owner:  NLM     Status:  MEDLINE    
The purpose of this study was to validate immunohistochemistry (IHC) as an alternative to telomerase repeat amplification protocol (TRAP) analysis to detect telomerase activity. TRAP-enzyme-linked immunosorbent assay (ELISA) reactivity was compared with telomerase reverse transcription (TERT) IHC staining in 22 feline mammary tissues (6 normal mammary glands, 2 dysplastic mammary glands, 1 fibroadenoma, and 13 malignant neoplasms [6 solid mammary carcinomas, 2 squamous-cell carcinomas, 4 tubulopapillary mammary carcinomas, and 1 mammary carcinosarcoma]). TERT IHC staining revealed enzymatic expression in nuclear, nucleolar, cytoplasmic, and combined nuclear and nucleolar staining patterns that were separately quantified by image analysis and expressed as the absolute number (average) of positive cells or percentage of positive cells with respect to overall cellularity. With TERT IHC staining, the absolute number and percentage of cells with positive nuclei and nucleoli within the same cell were the variables with the greatest discrimination between benign and malignant mammary lesions (analysis of variance [ANOVA], average P < 0.0001; percentage P < 0.001). For TRAP-ELISA-positive versus TRAP-ELISA-negative tissues, a positive test result provided greater differentiation between malignant versus benign mammary lesions (ANOVA, average P = 0.00038; percentage P = 0.0022). The same IHC pattern of expression showed a proportional and significant (average P = 0.004; percentage P = 0.002) but low (average R = 0.60; percentage R = 0.63) correlation with TRAP-ELISA by the Pearson test. The correlation coefficients obtained show that IHC and TRAP cannot be considered interchangeable because the 2 methods are more complementary than exclusive.
Laura Fusaro; Serena Panarese; Barbara Brunetti; Daniele Zambelli; Cinzia Benazzi; Giuseppe Sarli
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of veterinary diagnostic investigation : official publication of the American Association of Veterinary Laboratory Diagnosticians, Inc     Volume:  21     ISSN:  1040-6387     ISO Abbreviation:  J. Vet. Diagn. Invest.     Publication Date:  2009 May 
Date Detail:
Created Date:  2009-05-01     Completed Date:  2009-07-14     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9011490     Medline TA:  J Vet Diagn Invest     Country:  United States    
Other Details:
Languages:  eng     Pagination:  369-73     Citation Subset:  IM    
Department of Veterinary Public Health and Animal Pathology, Section of General Pathology and Pathologic Anatomy, Faculty of Veterinary Medicine, University of Bologna, Via Tolara di Sopra, Bologna, Italy.
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MeSH Terms
Carcinoma / enzymology,  veterinary
Gene Expression Regulation, Enzymologic / physiology
Gene Expression Regulation, Neoplastic / physiology
Immunohistochemistry / methods,  veterinary*
Mammary Glands, Animal / enzymology*
Mammary Neoplasms, Animal / diagnosis*,  enzymology,  metabolism
Telomerase / analysis*,  metabolism*
Reg. No./Substance:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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