In vitro T cell hyperreactivity in obese strain (OS) chickens is due to a defect in nonspecific suppressor mechanism(s)

G. Kromer, K. Schauenstein, N. Neu, K. Stricker, G. Wick

Résultats de recherche: Contribution à un journalArticleRevue par des pairs

23 Citations (Scopus)

Résumé

Spontaneous autoimmune thyroiditis of OS chickens is associated with a marked hyperreactivity of the T cell system. The purpose of the present study was to investigate the underlying regulatory mechanisms. Co-cultivation experiments between Con A-stimulated OS and NWL lymphocytes in communicating cultures revealed soluble regulatory factors to be responsible for the observed functional differences: the high proliferative response to Con A and hyperproduction of IL 2 of OS cells was found to be due to a deficiency in the conditioned medium of dialyzable inhibitory factor(s) that regulate IL 2 secretion of NWL lymphocytes. Furthermore, sera of young NWL chickens were found to profoundly inhibit the IL 2-promoted lymphoblast proliferation. This IL 2 antagonizing activity is lost with age (3 to 6 yr) and was found to be significantly diminished in OS birds throughout ontogeny, thus pointing to possible parallels between immune regulatory dysfunction in autoimmunity and in physiologic aging. Both enhanced T cell response and the defect in serum suppressor were inherited by (OS x CB)F1 animals, indicating that these two aberrations may be related to each other.

langue originaleAnglais
Pages (de - à)2458-2463
Nombre de pages6
journalJournal of Immunology
Volume135
Numéro de publication4
étatPublié - 1 déc. 1985
Modification externeOui

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