Developmental interactions of CD4 T cells and thymocytes: age-related differential effects

Masha Fridkis-Hareli, Ramit Mehr, Loya Abel, Amiela Globerson

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


The study was designed to determine whether the developmental potential of immature thymocytes in the thymus is altered in aging, and whether concomitantly present mature T cells have any feedback effect. The strategy was to seed sorted double negative, CD4-CD8-(DN) thymocytes on their own, or in the presence of mature T cells, onto lymphoid depleted fetal thymus (FT) explants, and to examine the resulting T cell subsets. Thymocyte donors were young (2-3 months) and old (24 months) C57BL/6J, Thy1.2 mice and splenocytes were from C57BL/Ka, Thy1.1 mice. The DN cells of the old gave rise to lower values of double positive CD4+CD8+ (DP) cells than those of the young. Cocultures containing a mixture of DN thymocytes and CD4+CD8- splenocytes showed higher CD4+CD8- and DN, and lower DP and CD4-CD8+ levels in the old-donor derived cells, as compared with the young ones. Similar results were obtained with CD4+CD8- thymocytes. In contrast, the presence of CD4-CD8+ splenocytes had no effect on the pattern of DN cell development. Our data indicate that differentiation of CD4/CD8 thymocyte phenotypes is affected by CD4+ cells, in an age-associated differential manner.

Original languageEnglish
Pages (from-to)169-178
Number of pages10
JournalMechanisms of Ageing and Development
Issue number3
StatePublished - 1 Jan 1994
Externally publishedYes


  • Aging
  • T lymphocytes
  • Thymic microenvironment

ASJC Scopus subject areas

  • Aging
  • Developmental Biology


Dive into the research topics of 'Developmental interactions of CD4 T cells and thymocytes: age-related differential effects'. Together they form a unique fingerprint.

Cite this