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PubMed · 6257

[Substituted benzamides].

Abstract

The comparison of the therapeutic effects of three molecules belonging to the substituted benzamide family allows the following observations: --the three products are generally well tolerated by the organism; --at sufficient doses they act as a major tranquilizers: -sulpiride is chiefly a disinhibitor but also has antipsychotic properties; -sultopride is at first somewhat sedative, especially when given parenterally, then antipsychotic, and little by little desinhibiting; -GRI 16-65 is "soothing", "euphoriant", "sociabilizing", as well as antipsychotic. Effect of reintegration in reality seems to constitute a common characteristic of these three products.

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BibTeXRIS

J C Scotto. 1975. [Substituted benzamides].. https://pubmed.ncbi.nlm.nih.gov/6257/

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The cloned dopamine D2 receptor reveals different densities for dopamine receptor antagonist ligands. Implications for human brain positron emission tomography.

Since [3H]emonapride ([3H]YM-09151-2), a benzamide neuroleptic, consistently detects more dopamine D2 receptors than [3H]spiperone in the same tissue, we tested whether this property was inherent in the cloned dopamine D2 receptor. We found that the density of dopamine D2 receptors labelled by [3H]emonapride was 1.5-fold to 2-fold (mean of 1.8-fold) higher than the density of dopamine D2 receptors labelled by [3H]spiperone in cells expressing cloned dopamine D2 receptors (either the short form (from rat) or the long form (from human)), matching similar findings in anterior pituitary tissue (rat or pig) or in post-mortem human caudate nucleus tissue. The situation was similar for another benzamide, [3H]raclopride, which revealed 1.3-fold to 1.8-fold (mean of 1.5-fold) more binding sites than that for [3H]spiperone in cell membranes containing cloned dopamine D2 receptors. The apparently different dopamine D2 receptor densities revealed by these two types of 3H-ligands (i.e. [3H]spiperone and the [3H]benzamides), therefore, arise from an inherent property of the dopamine D2 receptor protein. These findings for the cloned dopamine D2 receptor, therefore, partly explain the higher dopamine D2 receptor density measured in human brain (by positron emission tomography) when using radioactive raclopride compared to results using radioactive methylspiperone.(ABSTRACT TRUNCATED AT 250 WORDS)

Antipsychotic Agents