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The DOI matches its Crossref record; 42 of the 42 references it cites were found in a registry or an index.

Accurate measurement of cholecystokinin in plasma

Rehfeld, Jens F·1998·Clinical Chemistry

Abstract

Shortage of reliable plasma assays has hampered studies of cholecystokinin (CCK). The assay problems are low plasma concentrations, extensive molecular heterogeneity, and close homology of CCK to gastrin, which circulates in higher concentrations. To develop an accurate CCK RIA, antibodies were raised in rabbits, guinea pigs, and mice in titers from 200 to 4 000 000. The specificity of the antisera was tested with homologous peptides, and tissue and plasma extracts. Rabbit 92128 produced antibodies in high titer (≥500 000) with sufficient avidity (K \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \(_{eff}^{{^\circ}}\) \end{document} ≥ 1012 mol−1) and the desired specificity. The antiserum binds the bioactive forms of CCK with equimolar potency and displays no reactivity with gastrin. CCK concentrations in plasma from healthy humans rose from 1.13 ± 0.10 pmol/L (mean ± SE, n = 26) to 4.92 ± 0.34 pmol/L after a mixed meal. Chromatography of human plasma revealed traces of CCK-58, a predominance of CCK-33 and CCK-22, and moderate amounts of CCK-8. The results show that it is possible to produce specific CCK-antisera using a sulfated CCK-12 analog.

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Metadata

Authors
Rehfeld, J. F.
Venue
Clinical Chemistry
Published
1998-05-01
Volume
44
Issue
5
Pages
991-1001
ISSN
  • 0009-9147 (ISSN-L)
  • 1530-8561
OpenAlex
W2156711661
Cited by
320
References
42
FWCI
4.04
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Accurate measurement of cholecystokinin in plasma. https://app.cochat.ai/papers/10.1093/clinchem/44.5.991
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Rehfeld, J. F. (1998). Accurate measurement of cholecystokinin in plasma. Clinical Chemistry. https://doi.org/10.1093/clinchem/44.5.991

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