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- W4255430792 abstract "Drugs acting at dopamine D2-like receptors play a pivotal role in the treatment of both schizophrenia and Parkinson's disease. Recent studies have demonstrated a role for G-protein independent D2 receptor signaling pathways acting through β-arrestin. In this study we describe the establishment of a Bioluminescence Resonance Energy Transfer (BRET) assay for measuring dopamine induced recruitment of human β-arrestin2 to the human dopamine D2 receptor. Dopamine, as well as the dopamine receptor agonists pramipexole and quinpirole, acted as full agonists in the assay as reflected by their ability to elicit marked concentration dependent increases in the BRET signal signifying β-arrestin2 recruitment to the D2 receptor. As expected from their effect on G-protein coupling and cAMP levels mediated through the D2 receptor RNPA, pergolide, apomorphine, ropinirole, bromocriptine, 3PPP, terguride, aripiprazole, SNPA all acted as partial agonists with decreasing efficacy in the BRET assay. In contrast, a wide selection of typical and atypical anti-psychotics was incapable of stimulating β-arrestin2 recruitment to the D2 receptor. Moreover, we observed that haloperidol, sertindole, olanzapine, clozapine and ziprasidone all fully inhibited the dopamine induced β-arrestin2 recruitment to D2 receptor (short variant) in a concentration dependent manner. We conclude that most anti-psychotics are incapable of stimulating β-arrestin2 recruitment to the dopamine D2 receptor, in accordance with their antagonistic properties at the level of G-protein coupling." @default.
- W4255430792 created "2022-05-12" @default.
- W4255430792 date "2005-01-01" @default.
- W4255430792 modified "2023-10-14" @default.
- W4255430792 title "P.3.147 Gender differences in prescribing of antipsychotic drugs in first 24 hours of admittance to the intensive care unit" @default.
- W4255430792 doi "https://doi.org/10.1016/s0924-977x(05)81083-1" @default.
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