Evidence map›Paper›PMID 12034761›Full record

ArticleThe Journal of general physiology2002

Stretch-induced calcium release in smooth muscle.

Guangju Ji, Robert J Barsotti, Morris E Feldman, Michael I Kotlikoff

Open access · bronzeAbstract read
In one paragraph

Article in The Journal of general physiology, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 42 papers.

0numbers the graph read from it
0cells of the map it votes in
42citing papers in PubMed
2.1field-weighted citation impact, top 13% of its field
1 · What the graph read from it

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.

2 · The registry

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.

3 · Its place in the literature

Who cites it

42 citing papers in PubMed, 100 citations in OpenAlex.

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  14. Intermittent hypoxia in rats reduces activation of Ca2+ sparks in mesenteric arteries.American journal of physiology. Heart and circulatory physiology · 2015
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors at 2 institutions in 1 country.

Guangju JiDepartment of Biomedical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.
Robert J Barsotti
Morris E Feldman
Michael I Kotlikoff
Cornell University · USThomas Jefferson University · US

Funding

Remodeling of Smooth Muscle in Bladder Outlet ObstructionP50DK052620 · NIDDK · UNIVERSITY OF PENNSYLVANIA · PI CHACKO, SAMUEL K. · 1998 to 2012
$12.9M
Smooth Muscle Ca Release in RYR and FKBP transgenic miceR01HL045239 · NHLBI · UNIVERSITY OF PENNSYLVANIA · PI KOTLIKOFF, MICHAEL I. · 1990 to 2006
$2.2M
CALCIUM-INDUCED CALCIUM RELEASE &URINARY OBSTRUCTIONR01DK058795 · NIDDK · CORNELL UNIVERSITY ITHACA · PI KOTLIKOFF, MICHAEL I. · 2001 to 2004
$1.0M
NHLBI NIH HHS HL 45239NHLBI NIH HHS R01 HL045239NIDDK NIH HHS DK 52620NIDDK NIH HHS DK 58795-01NIDDK NIH HHS P50 DK052620NIDDK NIH HHS R01 DK058795
6 · The paper itself

Abstract

Smooth muscle cells undergo substantial increases in length, passively stretching during increases in intraluminal pressure in vessels and hollow organs. Active contractile responses to counteract increased transmural pressure were first described almost a century ago (Bayliss, 1902) and several mechanisms have been advanced to explain this phenomenon. We report here that elongation of smooth muscle cells results in ryanodine receptor-mediated Ca(2+) release in individual myocytes. Mechanical elongation of isolated, single urinary bladder myocytes to approximately 120% of slack length (DeltaL = 20) evoked Ca(2+) release from intracellular stores in the form of single Ca(2+) sparks and propagated Ca(2+) waves. Ca(2+) release was not due to calcium-induced calcium release, as release was observed in Ca(2+)-free extracellular solution and when free Ca(2+) ions in the cytosol were strongly buffered to prevent increases in [Ca(2+)](i). Stretch-induced calcium release (SICR) was not affected by inhibition of InsP(3)R-mediated Ca(2+) release, but was completely blocked by ryanodine. Release occurred in the absence of previously reported stretch-activated currents; however, SICR evoked calcium-activated chloride currents in the form of transient inward currents, suggesting a regulatory mechanism for the generation of spontaneous currents in smooth muscle. SICR was also observed in individual myocytes during stretch of intact urinary bladder smooth muscle segments. Thus, longitudinal stretch of smooth muscle cells induces Ca(2+) release through gating of RYR. SICR may be an important component of the physiological response to increases in luminal pressure in smooth muscle tissues.

Indexed as

AnimalsBiological TransportCalciumCalcium SignalingChloridesMiceMuscle ContractionMuscle, SmoothMyocytes, Smooth MusclePatch-Clamp TechniquesRabbitsRyanodine Receptor Calcium Release ChannelSarcolemmaSarcoplasmic ReticulumUrinary BladderCalciumChloridesRyanodine Receptor Calcium Release Channel

Identifiers

PMID12034761
PMCPMC2233869
OpenAlexW2048915475

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-SA
Read underepoch 390

Registered trials

None linked

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.