Altered allogeneic immune responses in middle-aged mice.

Yimin Sun, Hanhan Li, Alan N. Langnas, Yong Zhao

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


It is well known that leukocyte composition, T cell phenotypes and immune function change in aged mice and humans. However, limited and conflicting results on the age-related immune changes in middle-aged mice were reported. Identification of the characteristics of allogeneic immune responses in aging mice may offer important information for transplantation immunology. The major age-related changes in the immune cell phenotypes and function of 12 months old mice include: 1) the significantly decreased CD4+ cell population in the peripheral blood, the major peripheral CD4+ cells is CD45RB(low)CD62L(low) memory phenotype; 2) the in vitro responses to alloantigens and Con A of splenocytes markedly reduced; 3) the in vivo secondary humoral immune responses to alloantigens significantly declined; 4) the age-related alteration in the thymus mainly occurred in CD4/CD8 double positive (DP) stage; and 5) increased CD80+ and MHC class II+ cell population in spleens. Thus, the major age-related immune changes in 12 months old mice occurred in CD4+ T cells in the periphery and DP stage in the thymus, which may subsequently lead to the decreased allogeneic immune responses and the different sensitivity to immunosuppressive drugs and treatments. Further studies on the characteristics of allogeneic immunity in aging individuals may help to determine the appropriated treatment for transplant aging individuals.

Original languageEnglish (US)
Pages (from-to)440-446
Number of pages7
JournalCellular & molecular immunology
Issue number6
StatePublished - Dec 2004

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology
  • Infectious Diseases


Dive into the research topics of 'Altered allogeneic immune responses in middle-aged mice.'. Together they form a unique fingerprint.

Cite this