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. 1978 Mar;5(3):199–206. doi: 10.1111/j.1365-2125.1978.tb01624.x

Desensitization of the beta-adrenoceptor of lymphocytes from normal subjects and asthmatic patients in vitro.

J K Greenacre, P Schofield, M E Conolly
PMCID: PMC1429258  PMID: 207294

Abstract

1 A lymphocyte culture method has been developed for studying in vitro the effect of prolonged exposure (24 h) to isoprenaline (10(-8) to 10(-6) mol/l) and prostaglandin E1 (PGE1; 2.8 x 10(-6) mol/l). 2 The cyclic AMP response to isoprenaline is reduced by prolonged exposure to isoprenaline. The degree of desensitization is in proportion to the concentration of isoprenaline in the culture medium. 3 Culture with isoprenaline does not reduce the cyclic AMP response to PGE1. 4 Culture for 24 h with PGE1 (2.8 x 10(-6) mol/l) reduces the cyclic AMP response to PGE1. It also significantly reduces the response to isoprenaline. 5 Lymphocytes from asthmatic patients show a similar degree of desensitization to isoprenaline (after 24 h culture with isoprenaline) to that seen in lymphocytes from normal subjects. 6 A modified assay for phosphodiesterase (PDE) activity was developed. PDE activity increased 24.5% (P less than 0.02) after culture with PGE1 but was not significantly affected by culture with isoprenaline. 7 It is concluded that desensitization caused by prolonged exposure to various stimulators of adenylate cyclase is an event dependent on several components, not all of which are yet defined.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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