ArticleCellular signalling2015
Dopamine receptor D4 internalization requires a beta-arrestin and a visual arrestin.
Article in Cellular signalling, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed, 17 citations in OpenAlex.
- Altered Retinal Dopamine Homeostasis in Murine Models of Retinitis Pigmentosa.Journal of neurochemistry · 2026Article
- Cyclic nucleotide signaling as a drug target in retinitis pigmentosa.FEBS letters · 2025Review
- Pupillary Light Reflex Reveals Melanopsin System Alteration in the Background of Myopia-26, the Female Limited Form of Early-Onset High Myopia.Investigative ophthalmology & visual science · 2024Article
- Multiple Roles of cAMP in Vertebrate Retina.Cells · 2023Review
- A Split Luciferase Complementation Assay for the Quantification of β-Arrestin2 Recruitment to Dopamine DInternational journal of molecular sciences · 2020Article
- Dopamine: Functions, Signaling, and Association with Neurological Diseases.Cellular and molecular neurobiology · 2019Review
- Protective effect of clusterin on rod photoreceptor in rat model of retinitis pigmentosa.PloS one · 2017Article
- Activation of oncogenic tyrosine kinase signaling promotes insulin receptor-mediated cone photoreceptor survival.Oncotarget · 2016Article
- Embryonic markers of cone differentiation.Molecular vision · 2016Article
- Arrestin 1 and Cone Arrestin 4 Have Unique Roles in Visual Function in an All-Cone Mouse Retina.Investigative ophthalmology & visual science · 2015Article
- Visual Cone Arrestin 4 Contributes to Visual Function and Cone Health.Investigative ophthalmology & visual science · 2015Article
Corrections and comments
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Authors and funding
6 authors at 3 institutions in 3 countries.
Funding
Abstract
purposeThe G-protein coupled receptor (GPCR) Dopamine Receptor D4 (DRD4) plays an essential role in cAMP regulation and gap junctional coupling in the photoreceptors, where DRD4 expression is under circadian control. Previous in vitro transfection studies of human DRD4 desensitization have reported that DRD4 is not internalized upon dopamine stimulation when beta-arrestin is co-transfected with DRD4. We hypothesized that the visual arrestins, ARR1 and ARR4, play a modulatory role in DRD4 desensitization in the photoreceptors.
methodsTo test this hypothesis, immunohistochemistry analysis of mouse retinas was used to determine the cellular localization of beta-arrestins and DRD4 in photoreceptors. In vitro studies were performed in HEK293T cells transiently transfected with human DRD4 and arrestins. First, co-immunoprecipitation experiments were executed to test protein-protein interactions and to investigate the effect of dopamine stimulation. Second, immunohistochemistry analysis was implemented to study DRD4 internalization and translocation of ARR4.
resultsImmunohistochemistry studies of mouse retinas confirmed the expression of beta-arrestin 2, ARR1 and ARR4, as well as DRD4 in mouse cone photoreceptor inner segments. Co-immunoprecipitation experiments revealed a dopamine-dependent protein-protein interaction between human DRD4 and ARR4. In vitro internalization experiments showed that no detectable internalization of DRD4 was observed with any single arrestin co-transfected. However, a dopamine-dependent internalization of DRD4 was observed with three out of six sets of two arrestins co-transfected with DRD4. Each of these pairs of arrestins contained one visual arrestin and one beta-arrestin, and no internalization was observed with either two visual arrestins or two beta-arrestins. Additional time-course experiments revealed that in vitro, ARR4 translocates to co-localize with DRD4 at the plasma membrane in response to 30min of dopamine stimulation.
conclusionsThe results have functional implications and we hypothesize that the desensitization and internalization of DRD4 in photoreceptors are synergistically mediated by both visual and beta-arrestins. These results are additionally unique because they demonstrate for the first time that at least one G-protein coupled receptor, DRD4, requires two arrestins for desensitization and internalization, and opens up the possibility that other G-protein coupled receptors may require more than one arrestin for desensitization and/or internalization.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.