Cited by 109Attention Deficit Hyperactivity DisorderNeurotransmitter Receptor Influence on BehaviorNeuroscience and Neuropharmacology Research

A Comprehensive In Vitro Screening of d-, l- , and dl-threo -Methylphenidate: An Exploratory Study

Markowitz, John S., DeVane, C. Lindsay, Pestreich, Linda K., Patrick, Kennerly S., Muniz, Rafael·2006·Journal of Child and Adolescent Psychopharmacology

Abstract

dl-Methylphenidate (MPH) has been widely used to treat attention-deficit/hyperactivity disorder (ADHD) for the last half century. It had been exclusively available in the racemic form, i.e., a 50:50 mixture of d- and l-isomers. However, a single enantiomer formulation, d-MPH (dexmethylphenidate), became available for general clinical use in 2002. For this reason, the intrinsic pharmacological differences in the effects of d- and l-MPH have recently come under intense investigation. The primary therapeutic effects of MPH are generally recognized to reside in the d-isomer. The present investigation provides quantitative values for a broad range of receptor-level interactions of the individual MPH isomers to better characterize the distinction between dl-MPH versus d-MPH versus l-MPH as it relates to binding affinity at sites associated with relevant central nervous system (CNS) pharmacology, as well as peripheral physiology. Overall, there were few differences in binding affinities between d-MPH and the racemate whereas there were more apparent differences between d-MPH and l-MPH. d-MPH exhibited prominent affinity at the norepinephrine transporter (NET) site, even exceeding such affinity at the dopamine transporter (DAT). These results further demonstrate that affinity for catecholaminergic sites largely resides in the d-MPH isomer. Although binding affinity was not demonstrable at the serotonin (5-HT) transporter site (SERT), novel findings of the study included affinity for…

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Crossref · 10.1089/cap.2006.16.687

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Authors
Markowitz, J. S., DeVane, C. L., Pestreich, L. K., Patrick, K. S., & Muniz, R.
Affiliations
  • Medical University of South Carolina (US)
  • Norvartis Pharmaceuticals, East Hanover, New Jersey.
Venue
Journal of Child and Adolescent Psychopharmacology
Published
2006-12
Volume
16
Issue
6
Pages
687-698
ISSN
  • 1044-5463 (ISSN-L)
  • 1557-8992
OpenAlex
W2065636703
Cited by
109
References
47
Citations by year
2025: 3 · 2024: 6 · 2023: 4 · 2022: 3 · 2021: 12 · 2020: 5 · 2019: 6 · 2018: 8 · 2017: 4 · 2016: 7 · 2015: 6 · 2014: 8 · 2013: 4 · 2012: 8
FWCI
3.19
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Child and Adolescent Psychopharmacology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Attention Deficit Hyperactivity Disorder
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
methylphenidate, enantiomers, racemic mixtures, attention deficit hyperactivity disorder, receptor binding affinity, norepinephrine transporter, dopamine transporter, 5-HT1A receptor, 5-HT2B receptor, serotonergic neurotransmission, CNS pharmacology
MeSH terms
Central Nervous System Stimulants, Animals, Carrier Proteins, Cells, Cultured, Drug Evaluation, Preclinical, Guinea Pigs, Humans, Ion Channels, Isomerism, Methylphenidate, Protein Binding, Receptors, Drug, Receptors, Muscarinic, Stereoisomerism, Receptor, Serotonin, 5-HT1A, Receptor, Serotonin, 5-HT2B, Dopamine Plasma Membrane Transport Proteins, Norepinephrine Plasma Membrane Transport Proteins, Rats, Dexmethylphenidate Hydrochloride

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