Oct 1, 1989

Antigenic analysis of the second extra-cellular loop of the human beta-adrenergic receptors

Clinical and Experimental Immunology
Y MagnussonJ Hoebeke

Abstract

Polyclonal antibodies were raised in rabbits by immunization with free peptides corresponding to positions 197-222 of the human beta 1-adrenergic receptor (beta 1 peptide) and the corresponding sequence (172-197) of the human beta 2-adrenergic receptor (beta 2 peptide). While the beta 2 peptide yielded antibodies that cross-reacted with the beta 1 peptide, the antibodies against the beta 1 peptide did not cross-react with the beta 2 sequence. Cross-reactivity of the anti-beta 2 peptide antibodies and the selectivity of the anti-beta 1 peptide antibodies were also revealed in the recognition by immunoblots of the beta 1- and beta 2-adrenergic receptors of different species or of the receptor gene products expressed in a bacterial vector. These antibodies could be used immunohistochemically to visualize the beta-adrenergic receptors on rabbit heart. The anti-beta 2 peptide antibodies did not show any functional effect on the beta-adrenergic receptors; the anti-beta 1 peptide antibodies were able to displace agonist affinity to higher values. Recognition of truncated peptides by the anti-beta 1 and anti-beta 2 peptide antibodies suggested that the cross-reaction of the anti-beta 2 peptide antibodies was due to the recognition of a...Continue Reading

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Mentioned in this Paper

Immune Response
Immunoblotting, Reverse
Carboxy-Terminal Amino Acid
Extracellular
Antigenic Specificity
Myocardium
Cross Reactions
Leopard Syndrome
ADRB2 gene
Immunization Domain

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