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  • Title: 5-HT3 receptors in NG108-15 neuroblastoma x glioma cells: effect of the novel agonist 1-(m-chlorophenyl)-biguanide.
    Author: Boess FG, Sepúlveda MI, Lummis SC, Martin IL.
    Journal: Neuropharmacology; 1992 Jun; 31(6):561-4. PubMed ID: 1407396.
    Abstract:
    The effect of the novel agonist, 1-(m-chlorophenyl)-biguanide (mCPBG) was examined on 5-HT3 receptors in NG108-15 mouse neuroblastoma x rat glioma hybrid cells, using whole-cell voltage-clamp and radioligand binding on intact cells. Electrophysiological studies showed that mCPBG is a partial agonist, with an EC50 of 3.1 microM. Displacement of the selective 5-HT3 receptor antagonist [3H]GR65630 by mCPBG revealed a Ki of 14.2 nM. The study suggests that mCPBG may have a high affinity for desensitized 5-HT3 receptors and also revealed some differences between 5-HT3 receptors in NG108-15 and N1E-115 cells.
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