MDL 72222 - CAS 40796-97-2
Category: Inhibitor
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Molecular Formula:
Molecular Weight:
5-HT Receptor
MDL 72222 is a 5-HT3 receptor antagonist.
≥99% by HPLC
MDL72222; MDL 72222; MDL-72222; Tropanyl 3,5-dichlorobenzoate; Bemesetron; endo-3,5-Dichloro-benzoic Acid 8-Methyl-8-azabicyclo[3.2.1]oct-3-yl Ester
Canonical SMILES:
1.Joint manipulation reduces hyperalgesia by activation of monoamine receptors but not opioid or GABA receptors in the spinal cord.
Skyba DA;Radhakrishnan R;Rohlwing JJ;Wright A;Sluka KA Pain. 2003 Nov;106(1-2):159-68.
Joint manipulation has long been used for pain relief. However, the underlying mechanisms for manipulation-related pain relief remain largely unexplored. The purpose of the current study was to determine which spinal neurotransmitter receptors mediate manipulation-induced antihyperalgesia. Rats were injected with capsaicin (50 microl, 0.2%) into one ankle joint and mechanical withdrawal threshold measured before and after injection. The mechanical withdrawal threshold decreases 2 h after capsaicin injection. Two hours after capsaicin injection, the following drugs were administered intrathecally: bicuculline, blocks gamma-aminobutyric acid (GABAA) receptors; naloxone, blocks opioid receptors; yohimbine blocks, alpha2-adrenergic receptors; and methysergide, blocks 5-HT(1/2) receptors. In addition, NAN-190, ketanserin, and MDL-72222 were administered to selectively block 5-HT1A, 5-HT2A, and 5-HT3 receptors, respectively. Knee joint manipulation was performed 15 min after administration of drug. The knee joint was flexed and extended to end range of extension while the tibia was simultaneously translated in an anterior to posterior direction. The treatment group received three applications of manipulation, each 3 min in duration separated by 1 min of rest.
2.5-HT3 receptor antagonists block cocaine- and methamphetamine-induced place preference.
Suzuki T;Shiozaki Y;Masukawa Y;Misawa M Yakubutsu Seishin Kodo. 1992 Feb;12(1):33-8.
The effects of 5-HT3 receptor antagonists, MDL72222 and ICS205-930, on cocaine- and methamphetamine-induced place preference were examined. Cocaine (0.5-4.0 mg/kg, ip) and methamphetamine (0.25-2.0 mg/kg, ip) induced a dose-dependent place preference. The cocaine (4 mg/kg)-induced place preference was blocked by both MDL72222 and ICS205-930 (0.1 mg/kg, ip). On the other hand, the dose (0.1 mg/kg) of 5-HT3 antagonists did not block the methamphetamine (2 mg/kg)-induced place preference, although a higher dose (1.0 mg/kg) of 5-HT3 receptor antagonists did block it. The difference in sensitivity may reflect a difference in attack point in dopaminergic system of these two psychostimulants. Our findings suggest that the rewarding effects of cocaine and methamphetamine may be indirectly regulated by 5-HT3 receptor; cocaine being more sensitive to 5-HT3 receptor antagonists than methamphetamine.
3.5-HT3 receptor activation is required for induction of striatal c-Fos and phosphorylation of ATF-1 by amphetamine.
Genova LM;Hyman SE Synapse. 1998 Sep;30(1):71-8.
Dopamine (DA) has been shown to be required for the induction of striatal gene expression by psychostimulants. However, direct DA agonists or selective inhibitors of DA reuptake are relatively weak inducers of striatal gene expression compared with cocaine or amphetamine. So although necessary, DA alone is not sufficient to mediate the full gene induction response to psychostimulants. In addition to its actions on the DA transporter, amphetamine also enhances serotonin (5-HT) release in the striatum. In this study, we investigated the mechanism by which 5-HT contributes to the regulation of striatal gene expression by amphetamine. We found that selective lesions of serotonergic terminals in the rat forebrain using 5,7-dihydroxytryptamine prevented the full induction of striatal c-Fos by 4 mg/kg amphetamine. Furthermore, amphetamine-induced striatal c-Fos was completely inhibited by administration of the 5-HT3 receptor antagonist, MDL-72222, but not by the 5-HT2A/2C receptor antagonist, ritanserin. Consistent with this finding, the induction of c-Fos by 5-HT in primary cultures of E18 striatal neurons devoid of DA input was blocked by the 5-HT3 receptor antagonists, MDL-72222 and ICS 205-930, but not by 5-HT2A/2C antagonism.
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CAS 40796-97-2 MDL 72222

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