Apparent bypass of negative selection in CD8+ tumours in CD2-myc transgenic mice

Cameron, E.R., Campbell, M., Blyth, K., Argyle, S.A., Keanie, L., Neil, J.C. and Onions, D.E. (1996) Apparent bypass of negative selection in CD8+ tumours in CD2-myc transgenic mice. British Journal of Cancer, 73(1), pp. 13-7. (PMID:8554976) (PMCID:PMC2074291)

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Abstract

A role for antigen stimulation in lymphoid neoplasia has been postulated and is supported by indirect evidence that suggests that the interaction of antigen with both T cells and B cells may constitute an epigenetic event that can contribute to tumour induction or tumour progression. Using myc-bearing transgenic mice that develop mainly clonal T-cell lymphomas we have investigated the possibility that endogenous antigen-mediated clonal deletion might be overridden in tumorigenesis. CD2-myc transgenic mice were backcrossed on to a CBA/Ca background to ensure Mtv-mediated deletion of V beta 11-expressing T cells in the resultant offspring. Lymphomas arising from these mice were subsequently screened for V beta 11 expression. There was a clear correlation between the age at which mice developed neoplasia and the tumour phenotype. Mice with CD4- CD8+ tumours succumbed to thymic lymphoma at a significantly younger age than mice developing CD4+ CD8+ tumours. A small number of tumours consisted of the 'forbidden' V beta 11 phenotype, showing that cells vulnerable to transformation could escape negative selection. The majority of the V beta 11-positive tumours were CD4- CD8+ and were only observed in mice showing clinical evidence of tumour development at a relatively young age. The phenotype of these cells and the age at which tumours arose suggests that T cells escaping tolerance may be susceptible to transformation.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Blyth, Dr Karen and Cameron, Professor Ewan and Neil, Professor James and Onions, Professor David
Authors: Cameron, E.R., Campbell, M., Blyth, K., Argyle, S.A., Keanie, L., Neil, J.C., and Onions, D.E.
College/School:College of Medical Veterinary and Life Sciences > Institute of Infection Immunity and Inflammation
College of Medical Veterinary and Life Sciences > School of Medicine, Dentistry & Nursing
College of Medical Veterinary and Life Sciences > School of Veterinary Medicine
Journal Name:British Journal of Cancer
Publisher:Nature Publishing Group
ISSN:0007-0920

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