Activation is hallucinogenic and antagonism is therapeutic: role of 5-HT2A receptors in atypical antipsychotic drug actions

BL Roth, DL Willins, K Kristiansen… - The …, 1999 - journals.sagepub.com
BL Roth, DL Willins, K Kristiansen, WK Kroeze
The Neuroscientist, 1999journals.sagepub.com
This review summarizes recent studies with 5-hydroxytryptamine2A (5-HT2A) receptors,
which represent the major site of action of hallucinogens and a likely site for atypical
antipsychotic drug actions. We present evidence demonstrating that atypical antipsychotic
drugs, as a group, have a preferentially high affinity for 5-HT2A receptors, compared with
their affinities for other neurotransmitter receptors. The 5-HT2A receptor blockade seen with
atypical antipsychotic drugs is probably an essential factor in explaining many of the unique …
This review summarizes recent studies with 5-hydroxytryptamine2A (5-HT2A) receptors, which represent the major site of action of hallucinogens and a likely site for atypical antipsychotic drug actions. We present evidence demonstrating that atypical antipsychotic drugs, as a group, have a preferentially high affinity for 5-HT2A receptors, compared with their affinities for other neurotransmitter receptors. The 5-HT2A receptor blockade seen with atypical antipsychotic drugs is probably an essential factor in explaining many of the unique features of atypical antipsychotic drugs. Atypical antipsychotic drugs have high affinities for several other 5-HT receptors (5-HT2C, 5-HT6, and 5-HT7), and the potential role of these novel 5-HT receptors in atypical antipsychotic drug action is also summarized.
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