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Chinese Journal of Immunology ; (12)1985.
Artigo em Chinês | WPRIM | ID: wpr-674611

RESUMO

In this paper, it was reported that rat thymocytes harbor both high and low affinity ACTHR. The proper number of thymocytes used for deterting ACTHR varies from 1?10~6 /0.2 ml to 2 ?10~6 /ml, the maximum binding of ACTH to ACTHR occurs at 20 minutes. The IC_(50) for ACTH concentration is 800 nM or so. The saturation curves show that thymocyte ACTHRs are saturated at the concentration of 2.5 nM of ~(125)IACTH. There are high affinity ACTHR of 840 sites/cell on thymocyte (KD=0.15nM, Bmax = 2. 8 fmol/2 ? 10~6 cells); whereas low affinity ACTHRs are 12400 sites/cell (KD=4.2 nM, Bmax = 41.5 fmol/2 ? 10~6 cells).Moreover amputation stress can reduce thymocyte ACTHR remarkably.

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