An affinity/avidity model of peripheral T cell regulation

Hong Jiang, Yilun Wu, Bitao Liang, Zongyu Zheng, Guomei Tang, Jean Kanellopoulos, Mark J Soloski, Robert Winchester, Itamar Goldstein, Leonard Chess

Research output: Contribution to journalArticle


We show in these studies that Qa-1-dependent CD8+ T cells are involved in the establishment and maintenance of peripheral self tolerance as well as facilitating affinity maturation of CD4+ T cells responding to foreign antigen. We provide experimental evidence that the strategy used by the Qa-1-dependent CD8+ T cells to accomplish both these tasks in vivo is to selectively downregulate T cell clones that respond to both self and foreign antigens with intermediate, not high or low, affinity/avidity. Thus, the immune system evolved to regulate peripheral immunity using a unified mechanism that efficiently and effectively permits the system to safeguard peripheral self tolerance yet promote the capacity to deal with foreign invaders.

Original languageEnglish (US)
Pages (from-to)302-312
Number of pages11
JournalJournal of Clinical Investigation
Issue number2
StatePublished - Feb 2005


ASJC Scopus subject areas

  • Medicine(all)

Cite this

Jiang, H., Wu, Y., Liang, B., Zheng, Z., Tang, G., Kanellopoulos, J., Soloski, M. J., Winchester, R., Goldstein, I., & Chess, L. (2005). An affinity/avidity model of peripheral T cell regulation. Journal of Clinical Investigation, 115(2), 302-312.