ArticleEuropean journal of pharmacology2013
PAC₁ receptors mediate positive chronotropic responses to PACAP-27 and VIP in isolated mouse atria.
Article in European journal of pharmacology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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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.
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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.
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Who cites it
6 citing papers in PubMed, 12 citations in OpenAlex.
- Same same, but different: exploring the enigmatic role of the pituitary adenylate cyclase-activating polypeptide (PACAP) in invertebrate physiology.Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2024Article
- Cholecystokinin-A signaling regulates automaticity of pacemaker cardiomyocytes.Frontiers in physiology · 2023Article
- PACAP-38 in Acute ST-Segment Elevation Myocardial Infarction in Humans and Pigs: A Translational Study.International journal of molecular sciences · 2021Article
- Protective Effects of PACAP in Peripheral Organs.Frontiers in endocrinology · 2020Review
- Examination of Pituitary Adenylate Cyclase-Activating Polypeptide (PACAP) as a Potential Biomarker in Heart Failure Patients.Journal of molecular neuroscience : MN · 2019Article
- PACAP signaling in stress: insights from the chromaffin cell.Pflugers Archiv : European journal of physiology · 2018Review
Corrections and comments
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Authors and funding
4 authors at 2 institutions in 1 country.
Funding
Abstract
PACAP and VIP have prominent effects on cardiac function in several species, but little is known about their influence on the murine heart. Accordingly, we evaluated the expression of PACAP/VIP receptors in mouse heart and the response of isolated atria to peptide agonists. Quantitative PCR demonstrated that PAC₁, VPAC₁, and VPAC₂ receptor mRNAs are present throughout the mouse heart. Expression of all three receptor transcripts was low, PAC₁ being the lowest. No regional differences in expression were detected for individual receptor mRNAs after normalization to L32. Pharmacological effects of PACAP-27, VIP, and the selective PAC₁ agonist maxadilan were evaluated in isolated, spontaneously beating atria from C57BL/6 mice of either sex. Incremental additions of PACAP-27 at 1 min intervals caused a concentration-dependent tachycardia with a logEC₅₀=-9.08 ± 0.15 M (n=7) and a maximum of 96.3 ± 5.9% above baseline heart rate. VIP and maxadilan also caused tachycardia but their potencies were about two orders of magnitude less. Increasing the dosing interval to 5 min caused a leftward shift of the concentration-response curve to maxadilan but no changes in the curves for PACAP-27 or VIP. Under this condition, neither the potency nor the efficacy of maxadilan differed from those of PACAP-27. Neither PACAP-27 nor maxadilan caused tachyphylaxis, and maximal responses to maxadilan were maintained for at least 2 h. We conclude that all three VIP/PACAP family receptors are expressed by mouse cardiac tissue, but only PAC₁ receptors mediate positive chronotropic responses to PACAP-27 and VIP.
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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.