Cited by 278Neurotransmitter Receptor Influence on BehaviorReceptor Mechanisms and SignalingNeuroscience and Neuropharmacology Research

Prominence of the dopamine D2 short isoform in dopaminergic pathways

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Khan, Zafar U., Mrzljak, Ladislav, Gutierrez, Antonia, de la Calle, Adelaida, Goldman-Rakic, Patricia S.·1998·Proceedings of the National Academy of Sciences

Abstract

As a result of alternative splicing, the D2 gene of the dopamine receptor family exists in two isoforms. The D2 long is characterized by the insertion of 29 amino acids in the third cytoplasmic loop, which is absent in the short isoform. We have produced subtype-specific antibodies against both the D2 short and D2 long isoforms and found a unique compartmentalization between these two isoforms in the primate brain. The D2 short predominates in the cell bodies and projection axons of the dopaminergic cell groups of the mesencephalon and hypothalamus, whereas the D2 long is more strongly expressed by neurons in the striatum and nucleus accumbens, structures targeted by dopaminergic fibers. These results show that the splice variants of the dopamine D2 receptor are differentially distributed and possess distinct functions. The strategic localization of the D2 short isoform in dopaminergic cell bodies and axons strongly suggests that this isoform is the likely dopamine autoreceptor, whereas the D2 long isoform is primarily a postsynaptic receptor.

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  • These negative feedback mechanisms are mediated by somato-dendritic D2/D3 autoreceptors located on midbrain dopamine neurons, which play a key role in regulating dopamine synthesis and release by acting as potent inhibitors in the presence of high dopamine concentrations.

    “These negative feedback mechanisms are mediated by somato-dendritic D2/D3 autoreceptors located on midbrain dopamine neurons, which play a key role in regulating dopamine synthesis and release by acting as potent inhibitors in the presence of high dopamine concentrations (Mercuri et al., 1992, 1997; Sesack et al., 1994; Khan et al., 1998).”

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Research works printed but not linked: 3

  1. [2]Reynolds, J. P. (1996) Biochem. Soc. Trans. 24, 202-205.
  2. [18]Neve, K. A., Neve, R. L., Fidel, S., Janowski, A. & Higgins, G. A. (1991) Proc. Natl. Acad. Sci. USA 88, 2802-2806.
  3. [24]Lidow, M. S. & Goldman-Rakic, P. S. (1994) Proc. Natl. Acad. Sci. USA 91, 4353-4356.

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Authors
Khan, Z. U., Mrzljak, L., Gutierrez, A., de la Calle, A., & Goldman-Rakic, P. S.
Affiliations
  • Yale University (US)
  • Section of Neurobiology, Yale University School of Medicine, New Haven, CT 06510; and Department of Cell Biology, University of Malaga, Malaga 29071, Spain
Venue
Proceedings of the National Academy of Sciences
Published
1998-06-23
Volume
95
Issue
13
Pages
7731-7736
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2032223397
Cited by
278
References
29
Citations by year
2026: 3 · 2025: 6 · 2024: 6 · 2023: 8 · 2022: 8 · 2021: 5 · 2020: 13 · 2019: 10 · 2018: 4 · 2017: 8 · 2016: 10 · 2015: 9 · 2014: 11 · 2013: 18 · 2012: 14
FWCI
2.77
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Receptor Mechanisms and Signaling
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
dopamine D2 receptor, alternative splicing, splice variants, dopaminergic pathways, dopamine autoreceptors, postsynaptic dopamine receptors, striatum, nucleus accumbens, midbrain, hypothalamus, receptor localization
MeSH terms
Animals, Antibodies, Axons, Brain Stem, Cell Compartmentation, Macaca mulatta, Neurons, Rabbits, Alternative Splicing, Receptors, Dopamine D2

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