ArticleChannels (Austin, Tex.)2014
Somatostatin receptor subtype 4 modulates L-type calcium channels via Gβγ and PKC signaling in rat retinal ganglion cells.
Article in Channels (Austin, Tex.), 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 15 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
15 citing papers in PubMed, 19 citations in OpenAlex.
- Somatostatin receptor 4 (SSTR4) is a tumor suppressor in cutaneous and head & neck squamous cell carcinomas.Molecular oncology · 2026Article
- Neuropeptidergic systems in psychiatric disorders.Frontiers in endocrinology · 2025Review
- Article
- Neuropeptide System Regulation of Prefrontal Cortex Circuitry: Implications for Neuropsychiatric Disorders.Frontiers in neural circuits · 2022Review
- Reassessment of SST4 Somatostatin Receptor Expression Using SST4-eGFP Knockin Mice and the Novel Rabbit Monoclonal Anti-Human SST4 Antibody 7H49L61.International journal of molecular sciences · 2021Article
- Relevance of Peptide Homeostasis in Metabolic Retinal Degenerative Disorders: Curative Potential in Genetically Modified Mice.Frontiers in pharmacology · 2021Review
- Molecular and Cellular Mechanisms Underlying Somatostatin-Based Signaling in Two Model Neural Networks, the Retina and the Hippocampus.International journal of molecular sciences · 2019Review
- International Union of Basic and Clinical Pharmacology. CV. Somatostatin Receptors: Structure, Function, Ligands, and New Nomenclature.Pharmacological reviews · 2018Review
- Somatostatin depresses the excitability of subicular bursting cells: Roles of inward rectifier KHippocampus · 2017Article
- A Presynaptic Group III mGluR Recruits Gβγ/SNARE Interactions to Inhibit Synaptic Transmission by Cone Photoreceptors in the Vertebrate Retina.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2017Article
- Dopamine D1 receptor modulation of calcium channel currents in horizontal cells of mouse retina.Journal of neurophysiology · 2016Article
- Research Resource: Real-Time Analysis of Somatostatin and Dopamine Receptor Signaling in Pituitary Cells Using a Fluorescence-Based Membrane Potential Assay.Molecular endocrinology (Baltimore, Md.) · 2016Article
- GPR142 Agonists Stimulate Glucose-Dependent Insulin Secretion via Gq-Dependent Signaling.PloS one · 2016Article
- Parallel Inhibition of Dopamine Amacrine Cells and Intrinsically Photosensitive Retinal Ganglion Cells in a Non-Image-Forming Visual Circuit of the Mouse Retina.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2015Article
- The unusual suspects: Regulation of retinal calcium channels by somatostatin.Channels (Austin, Tex.) · 2015Article
Corrections and comments
- Commented on by
- Erratum issuedErrata.2015
Authors and funding
4 authors at 2 institutions in 2 countries.
Funding
Abstract
Somatostatin subtype-4 receptors (sst4) inhibit L-type calcium channel currents (ICa) in retinal ganglion cells (RGCs). Here we identify the signaling pathways involved in sst4 stimulation leading to suppression of ICa in RGCs. Whole cell patch clamp recordings were made on isolated immunopanned RGCs using barium as a charge carrier to isolate ICa. Application of the selective sst4 agonist, L-803 (10 nM), reduced ICa by 41.2%. Pretreatment of cells with pertussis toxin (Gi/o inhibitor) did not prevent the action of L-803, which reduced ICa by 34.7%. To determine the involvement of Gβγ subunits after sst4 activation, depolarizing pre-pulse facilitation paradigms were used to remove voltage-dependent inhibition of calcium channels. Pre-pulse facilitation did not reverse the inhibitory effects of L-803 on ICa (8.4 vs. 8.8% reductions, ctrl vs. L-803); however, pharmacologic inhibition of Gβγ reduced ICa suppression by L-803 (23.0%, P < 0.05). Inhibition of PKC (GF109203X; GFX) showed a concentration-dependent effect in preventing the action of L-803 on ICa (1 μM GFX, 34.3%; 5 μM GFX, 14.6%, P < 0.05). When both PKC and Gβγ were inhibited, the effects of L-803 on ICa were blocked (1.8%, P < 0.05). These results suggest that sst4 stimulation modulates RGC calcium channels via Gβγ and PKC activation. Since reducing intracellular Ca(2+) is known to be neuroprotective in RGCs, modulating these sst4 signaling pathways may provide insights to the discovery of unique therapeutic targets to reduce intracellular Ca(2+) levels in RGCs.
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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.