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Development and Performance of a Highly Sensitive and Specific Two-site Immunometric Assay of Calcitonin Gene-related Peptide by Zaidi, M; Seth, R; Girgis, S I; Self, C H is a Medicine article available to read on EtoBox.

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## Abstract Calcitonin gene-related peptide (CGRP), a potent endogenous circulating vasodilator, is produced by the alternative splicing of the calcitonin/CGRP gene and is expressed mainly in neural and cardiovascular tissues. We recently reported a highly sensitive radioimmunoassay of CGRP, based on an antiserum recognizing the C-terminus of the molecule. We have also found that circulating immunoreactive CGRP is heterogeneous; thus we are unable to measure selectively the intact molecule with our one-site competitive approach. We therefore attempted to construct a two-site immunometric assay involving two antibodies, one that detects the C-terminus and another that recognizes the midregion of the molecule. To enhance assay sensitivity, we applied a colorimetric amplification system to this assay. This rapid, robust, and reproducible assay provides more nearly accurate estimates of circulating CGRP and offers a sensitive and more specific alternative to the radioimmunoassay, with advantages in speed, simplicity, and convenience.

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Author

Zaidi, M; Seth, R; Girgis, S I; Self, C H

Publisher

American Association for Clinical Chemistry; American Association for Clinical Chemistry, Inc.; Oxford University Press (OUP); American Association for Clinical Chemistry (AACC); Test accounts (ISSN 0009-9147)

Published

1990

Language

EN

Field

Medicine (Health Sciences)