Abstract:
:Opiate analgesia, tolerance, and addiction are mediated by drug-induced activation of the mu opioid receptor. A fundamental question in addiction biology is why exogenous opiate drugs have a high liability for inducing tolerance and addiction while native ligands do not. Studies indicate that highly addictive opiate drugs such as morphine are deficient in their ability to induce the desensitization and endocytosis of receptors. Here, we demonstrate that this regulatory mechanism reveals an independent functional property of opiate drugs that can be distinguished from previously established agonist properties. Moreover, this property correlates with agonist propensity to promote physiological tolerance, suggesting a fundamental revision of our understanding of the role of receptor endocytosis in the biology of opiate drug action and addiction.
journal_name
Neuronjournal_title
Neuronauthors
Whistler JL,Chuang HH,Chu P,Jan LY,von Zastrow Mdoi
10.1016/s0896-6273(01)80032-5subject
Has Abstractpub_date
1999-08-01 00:00:00pages
737-46issue
4eissn
0896-6273issn
1097-4199pii
S0896-6273(01)80032-5journal_volume
23pub_type
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