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Review
. 2021 Jun;13(12):1073-1081.
doi: 10.4155/fmc-2021-0058. Epub 2021 Apr 28.

Histamine H2 receptor radioligands: triumphs and challenges

Steffen Pockes  1   2   3 , Katharina Tropmann  1
Affiliations
Free article
Review

Histamine H2 receptor radioligands: triumphs and challenges

Steffen Pockes et al. Future Med Chem. 2021 Jun.
Free article

Abstract

Since the discovery of the histamine H2 receptor (H2R), radioligands were among the most powerful tools to investigate its role and function. Initially, radiolabeling was used to investigate human and rodent tissues regarding their receptor expression. Later, radioligands gained increasing significance as pharmacological tools in in vitro assays. Although tritium-labeling was mainly used for this purpose, labeling with carbon-14 is preferred for metabolic studies of drug candidates. After the more-or-less successful application of numerous labeled H2R antagonists, the recent development of the G protein-biased radioligand [3H]UR-KAT479 represents another step forward to elucidate the widely unknown role of the H2R in the central nervous system through future studies.

Keywords: carbon-14; central nervous system; histamine H2 receptor; histamine H2 receptor agonists; histamine H2 receptor antagonists; radioligands; tritium.

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