Nonspecific augmentation of lymph node T cells and I-E-independent selective deletion of V beta 14+ T cells by Mtv-2 in the DDD mouse.
DDD/1 (DDD) mice were characterized by marked paucity of T cells in lymph nodes (LN). In DDD-Mtv-2/Mtv-2 (DDD-Mtv-2) congenics, T cells were 4- to 18-fold increased depending on ages but B cells doubled at the most. Thymus weight also increased. In DDDfDDD-Mtv-2, DDD neonatally infected with Mtv-2-derived exogenous MMTV (MMTV-2), neither LN cells nor thymus weight increased. The V beta 5+ and V beta 8+ T cell contents in LN were practically the same among three strains. The Mtv-2-induced expansion of LN T cells was polyclonal and appeared indigenous to DDD mice. Both Mtv-2 and MMTV-2 induced progressive age-dependent deletion of V beta 14+CD4+ LN cells. Mtv-2 but not MMTV-2 caused deletion of V beta 14+CD8+ LN cells and mature V beta 14+CD4+ thymocytes. Thus, Mtv-2- and MMTV-2-induced V beta 14+ T cell deletion may reflect intrathymic and peripheral elimination, respectively. The absence of I-E gene expression in DDD indicates that V beta 14+ T cell deletion advances independently of I-E molecules in this experimental system.
Nakano
H
H
Laboratory Animal Research Center, University of Tokyo, Japan.
Yoshimoto
T
T
Kakiuchi
T
T
Matsuzawa
A
A
D000375:Aging / Q000276:immunology / Q000473:pathology; D000818:Animals; D002452:Cell Count; D005260:Female; D015870:Gene Expression; D005814:Genes, Viral; D000949:Histocompatibility Antigens Class II / Q000235:genetics; D008198:Lymph Nodes / Q000166:cytology / Q000276:immunology; D008324:Mammary Tumor Virus, Mouse / Q000235:genetics* / Q000276:immunology*; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D008808:Mice, Inbred CBA; D011533:Proviruses / Q000235:genetics* / Q000276:immunology*; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000378:metabolism; D013601:T-Lymphocytes / Q000276:immunology*
D000949:Histocompatibility Antigens Class II; C024138:I-E-antigen; D016693:Receptors, Antigen, T-Cell, alpha-beta