ArticleInvestigative ophthalmology & visual science2011
Identification of P2X₃ and P2X₇ purinergic receptors activated by ATP in rat lacrimal gland.
Article in Investigative ophthalmology & visual science, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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Who cites it
16 citing papers in PubMed, 22 citations in OpenAlex.
- Current and Developing Therapeutics for Dry Eye Disease: Targeting Ion Channels.Current issues in molecular biology · 2026Review
- Novel Insights Into Muscarinic and Purinergic Responses in Primary Cultures of Rat Lacrimal Gland Myoepithelial Cells.Investigative ophthalmology & visual science · 2021Article
- Lacrimal Gland Myoepithelial Cells Are Altered in a Mouse Model of Dry Eye Disease.The American journal of pathology · 2020Article
- P2 Receptors as Therapeutic Targets in the Salivary Gland: From Physiology to Dysfunction.Frontiers in pharmacology · 2020Review
- Alteration in nerves and neurotransmitter stimulation of lacrimal gland secretion in the TSP-1Mucosal immunology · 2018Article
- TFOS DEWS II pain and sensation report.The ocular surface · 2017Review
- Signaling Pathways of Purinergic Receptors and Their Interactions with Cholinergic and Adrenergic Pathways in the Lacrimal Gland.Journal of ocular pharmacology and therapeutics : the official journal of the Association for Ocular Pharmacology and Therapeutics · 2016Review
- Ocular Purine Receptors as Drug Targets in the Eye.Journal of ocular pharmacology and therapeutics : the official journal of the Association for Ocular Pharmacology and Therapeutics · 2016Review
- Extracellular ATP induces intracellular alpha-synuclein accumulation via P2X1 receptor-mediated lysosomal dysfunction.Neurobiology of aging · 2015Article
- Purines in the eye: recent evidence for the physiological and pathological role of purines in the RPE, retinal neurons, astrocytes, Müller cells, lens, trabecular meshwork, cornea and lacrimal gland.Experimental eye research · 2014Review
- Expression of P2X3 and P2X 5 myenteric receptors varies during the intestinal postnatal development in the guinea pig.Cellular and molecular neurobiology · 2014Article
- Calcium signaling in lacrimal glands.Cell calcium · 2014Review
- Gene expression in human accessory lacrimal glands of Wolfring.Investigative ophthalmology & visual science · 2012Article
- Molecular and functional properties of P2X receptors--recent progress and persisting challenges.Purinergic signalling · 2012Review
- P2Y purinoceptors induce changes in intracellular calcium in acinar cells of rat lacrimal glands.Histochemistry and cell biology · 2012Article
- Increase of intracellular Ca2+ by purinergic receptors in cultured rat lacrimal gland myoepithelial cells.Investigative ophthalmology & visual science · 2011Article
Corrections and comments
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Authors and funding
4 authors at 2 institutions in 1 country.
Funding
Abstract
PURPOSE. To identify the type of purinergic receptors activated by adenosine triphosphate (ATP) in rat lacrimal gland and to determine their role in protein secretion. METHODS. Purinergic receptors were identified by RT-PCR, Western blot analysis, and immunofluorescence techniques. Acini from rat lacrimal gland were isolated by collagenase digestion. Acini were incubated with the fluorescence indicator fura-2 tetra-acetoxylmethyl ester, and intracellular [Ca(2+)] ([Ca(2+)](i)) was determined. Protein secretion was measured by fluorescence assay. RESULTS. The authors previously showed that P2X(7)receptors were functional in the lacrimal gland. In this study, they show that P2X(1-4) and P2X(6)receptors were identified in the lacrimal gland by RT-PCR, Western blot, and immunofluorescence analyses. P2X(5) receptors were not detected. ATP increased [Ca(2+)](i) and protein secretion in a concentration-dependent manner. Removal of extracellular Ca(2+) significantly reduced the ATP-stimulated increase in [Ca(2+)](i). Repeated applications of ATP caused desensitization of the [Ca(2+)](i) response. Incubation with the P2X(1) receptor inhibitor NF023 did not alter ATP-stimulated [Ca(2+)](i). Incubation with zinc, which potentiates P2X(2) and P2X(4) receptor responses, or lowering the pH to 6.8, which potentiates P2X(2) receptor responses, did not alter the ATP-stimulated [Ca(2+)](i). P2X(3) receptor inhibitors A-317491 and TNP-ATP significantly decreased ATP-stimulated [Ca(2+)](i) and protein secretion, whereas the P2X(3) receptor agonist α,β methylene ATP significantly increased them. The P2X(7) receptor inhibitor A438079 had no effect on ATP-stimulated [Ca(2+)](i) at 10(-6) M but did have an effect at 10(-4) M. CONCLUSIONS. Purinergic receptors P2X(1-4) and P2X(6) are present in the lacrimal gland. ATP uses P2X(3) and P2X(7) receptors to stimulate an increase in [Ca(2+)](i) and protein secretion.
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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.