Loss of CD45 cell surface expression in canine T-zone lymphoma results from reduced gene expression

Veterinary Immunology and Immunopathology
V MartiniS Comazzi

Abstract

Canine T-zone lymphoma (TZL) is a peculiar lymphoma subtype characterized by an indolent clinical course and aberrant CD45-negative phenotype, commonly recognized by flow cytometry (FC). Recent studies have described clinical presentation and behavior, but to date the mechanisms behind the loss of CD45 protein expression have never been investigated. The aims of this study were: 1) to confirm the absence of CD45 in canine TZL via the concomitant use of FC and immunohistochemistry with two different sources of antibody; and 2) to investigate the amount of CD45 transcript and the presence of CD45 gene in the neoplastic cells of dogs affected by TZL. 57 lymph node aspirates were included in the present study: 40 (70.2%) TZLs, 7 (12.3%) high grade T-cell lymphomas and 10 (17.5%) reactive lymph nodes. Neoplastic cells and normal T-cells were isolated from TZL and reactive lymph nodes, respectively, via cell sorting. Immunohistochemistry was performed on 2 TZL, 2 reactive lymph nodes and 2 Peripheral T-cell Lymphomas. Total RNA and genomic DNA were extracted from lymph-nodes aspirates. Two different quantitative real-time PCR experiments were designed, to determine the amount of the CD45 transcript and of the corresponding gene fragm...Continue Reading

Citations

Sep 15, 2017·Veterinary and Comparative Oncology·K L HughesA C Avery
Sep 20, 2018·Veterinary Clinical Pathology·Cyril Parachini-WinterElena Gorman
Apr 5, 2020·Veterinary Clinical Pathology·Kristina MeichnerDorothee Bienzle
Nov 20, 2020·Veterinary Pathology·Leah SteinMatti Kiupel

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