ArticleAmerican journal of physiology. Lung cellular and molecular physiology2012
Maternal high-altitude hypoxia and suppression of ryanodine receptor-mediated Ca2+ sparks in fetal sheep pulmonary arterial myocytes.
Article in American journal of physiology. Lung cellular and molecular physiology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
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, 17 citations in OpenAlex.
- MicroRNA-210 Mediates Hypoxic Pulmonary Hypertension in the Newborn Lamb.Hypertension (Dallas, Tex. : 1979) · 2025Article
- Long-term hypoxia modulates depolarization activation of BKFrontiers in physiology · 2024Article
- Chronic fetal hypoxia and antenatal Vitamin C exposure differentially regulate molecular signalling in the lung of female lambs in early adulthood.Frontiers in physiology · 2024Article
- Improved Workflow for Analysis of Vascular Myocyte Time-Series and Line-Scan CaInternational journal of molecular sciences · 2023Article
- Gestational long-term hypoxia induces metabolomic reprogramming and phenotypic transformations in fetal sheep pulmonary arteries.American journal of physiology. Lung cellular and molecular physiology · 2021Article
- Long-Term Hypoxia Negatively Influences CaFrontiers in physiology · 2021Article
- Gestational Hypoxia Inhibits Pregnancy-Induced Upregulation of CaHypertension (Dallas, Tex. : 1979) · 2020Article
- Pregnancy Increases CaHypertension (Dallas, Tex. : 1979) · 2019Article
- Long-Term High-Altitude Hypoxia and Alpha Adrenoceptor-Dependent Pulmonary Arterial Contractions in Fetal and Adult Sheep.Frontiers in physiology · 2019Article
- Gestational Hypoxia and Programing of Lung Metabolism.Frontiers in physiology · 2019Review
- Long-term hypoxia uncouples CaAmerican journal of physiology. Regulatory, integrative and comparative physiology · 2018Article
- Long-term high-altitude hypoxia influences pulmonary arterial L-type calcium channel-mediated CaAmerican journal of physiology. Regulatory, integrative and comparative physiology · 2018Article
- Muscarinic Receptor Activation Affects Pulmonary Artery Contractility in Sheep: The Impact of Maturation and Chronic Hypoxia on Endothelium-Dependent and Endothelium-Independent Function.High altitude medicine & biology · 2016Article
- Developmental acceleration of bradykinin-dependent relaxation by prenatal chronic hypoxia impedes normal development after birth.American journal of physiology. Lung cellular and molecular physiology · 2016Article
- Prenatal programming of pulmonary hypertension induced by chronic hypoxia or ductal ligation in sheep.Pulmonary circulation · 2013Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
9 authors at 3 institutions in 2 countries.
Funding
Abstract
Ca(2+) sparks are fundamental Ca(2+) signaling events arising from ryanodine receptor (RyR) activation, events that relate to contractile and dilatory events in the pulmonary vasculature. Recent studies demonstrate that long-term hypoxia (LTH) can affect pulmonary arterial reactivity in fetal, newborn, and adult animals. Because RyRs are important to pulmonary vascular reactivity and reactivity changes with ontogeny and LTH we tested the hypothesis that RyR-generated Ca(2+) signals are more active before birth and that LTH suppresses these responses. We examined these hypotheses by performing confocal imaging of myocytes in living arteries and by performing wire myography studies. Pulmonary arteries (PA) were isolated from fetal, newborn, or adult sheep that lived at low altitude or from those that were acclimatized to 3,801 m for > 100 days. Confocal imaging demonstrated preservation of the distance between the sarcoplasmic reticulum, nucleus, and plasma membrane in PA myocytes. Maturation increased global Ca(2+) waves and Ca(2+) spark activity, with sparks becoming larger, wider, and slower. LTH preferentially depressed Ca(2+) spark activity in immature pulmonary arterial myocytes, and these sparks were smaller, wider, and slower. LTH also suppressed caffeine-elicited contraction in fetal PA but augmented contraction in the newborn and adult. The influence of both ontogeny and LTH on RyR-dependent cell excitability shed new light on the therapeutic potential of these channels for the treatment of pulmonary vascular disease in newborns as well as adults.
Indexed as
Identifiers
What OpenQuestion holds
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.