ArticleThe Journal of physiology1997
The role of the sarcolemmal Ca(2+)-ATPase in the pH transients associated with contraction in rat smooth muscle.
Article in The Journal of physiology, 1997. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed, 34 citations in OpenAlex.
- Strengthening the basics: acids and bases influence vascular structure and function, tissue perfusion, blood pressure, and human cardiovascular disease.Pflugers Archiv : European journal of physiology · 2024Review
- Ion Channels, Transporters, and Sensors Interact with the Acidic Tumor Microenvironment to Modify Cancer Progression.Reviews of physiology, biochemistry and pharmacology · 2022Review
- Acid-base regulation and sensing: Accelerators and brakes in metabolic regulation of cerebrovascular tone.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2018Review
- Splice cassette II of Na+,HCO3(-) cotransporter NBCn1 (slc4a7) interacts with calcineurin A: implications for transporter activity and intracellular pH control during rat artery contractions.The Journal of biological chemistry · 2013Article
- Ca2+ clearance and contractility in vascular smooth muscle: evidence from gene-altered murine models.Journal of molecular and cellular cardiology · 2008Review
- Serca isoform expression in the mammalian retina.Experimental eye research · 2005Article
- Paradoxical block of the Na+-Ca2+ exchanger by extracellular protons in guinea-pig ventricular myocytes.The Journal of physiology · 2000Article
- In vivo pH and metabolite changes during a single contraction in rat uterine smooth muscle.The Journal of physiology · 1999Article
- Characterization of intracellular pH regulation in the guinea-pig ventricular myocyte.The Journal of physiology · 1999Article
Corrections and comments
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Authors and funding
6 authors at 1 institution in 1 country.
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Abstract
1. We have investigated the origin of the intracellular acid pH transients that accompany myometrial contraction. Intra- and extracellular pH were measured with SNARF and intracellular Ca2+ concentration ([Ca2+]i) with indo-1. 2. An intracellular acidification accompanied spontaneous contractions and those elicited by KCl depolarization or the addition of the agonists carbachol or prostaglandin F2 alpha. The size of the acidification increased with the magnitude of the contraction. 3. The intracellular acidification was accompanied by an extracellular alkalinization, showing that it results from proton movement across the surface membrane. Furthermore, it was decreased either by addition of Cd2+ (20 nM, an inhibitor of the sarcolemmal Ca(2+)-ATPase) or by elevating [Ca2+]o. 4. Extracellular alkalinization increased the magnitude of the rise of [Ca2+]i and force produced by KCl. 5. An intracellular acidification was also associated with contraction in the portal vein and ureter. 6. We conclude that the sarcolemmal Ca(2+)-ATPase produces a significant intracellular acidification while removing Ca2+. Both the acidification and decrease of [Ca2+]i will promote relaxation. Since Ca2+ and protons have opposite effects on many cellular processes, this dual regulation by these two ions may be of general importance.
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