Evidence map›Paper›PMID 21614516›Full record

ArticleStem cell reviews and reports2011

Calcium homeostasis in human induced pluripotent stem cell-derived cardiomyocytes.

Yee-Ki Lee, Kwong-Man Ng, Wing-Hon Lai, Yau-Chi Chan, Yee-Man Lau, Qizhou Lian, Hung-Fat Tse, Chung-Wah Siu

Open access · hybridAbstract readComparative Study
In one paragraph

Article in Stem cell reviews and reports, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 83 papers.

0numbers the graph read from it
0cells of the map it votes in
83citing papers in PubMed
5.2field-weighted citation impact, top 3% 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

83 citing papers in PubMed, 157 citations in OpenAlex.

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23 more citing papers are in PubMed but not listed here.

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

8 authors at 3 institutions in 2 countries.

Yee-Ki LeeCardiology Division, Department of Medicine, Queen Mary Hospital, University of Hong Kong, Hong Kong, China.
Kwong-Man Ng
Wing-Hon Lai
Yau-Chi Chan
Yee-Man Lau
Qizhou Lian
Hung-Fat Tse
Chung-Wah Siu
Queen Mary Hospital · CNUniversity of Hong Kong · HKHong Kong Eye Hospital · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

rationaleCardiomyocytes generated from human induced pluripotent stem cells (hiPSCs) are suggested as the most promising candidate to replenish cardiomyocyte loss in regenerative medicine. Little is known about their calcium homeostasis, the key process underlying excitation-contraction coupling.

objectiveWe investigated the calcium handling properties of hiPSC-derived cardiomyocytes and compared with those from human embryonic stem cells (hESCs). METHODS AND

resultsWe differentiated cardiomyocytes from hiPSCs (IMR90 and KS1) and hESCs (H7 and HES3) with established protocols. Beating outgrowths from embryoid bodies were typically observed 2 weeks after induction. Cells in these outgrowths were stained positively for tropomyosin and sarcomeric alpha-actinin. Reverse-transcription polymerase chain reaction studies demonstrated the expressions of cardiac-specific markers in both hiPSC- and hESC-derived cardiomyocytes. Calcium handling properties of 20-day-old hiPSC- and hESC-derived cardiomyocytes were investigated using fluorescence confocal microscopy. Compared with hESC-derived cardiomyocytes, spontaneous calcium transients from both lines of hiPSC-derived cardiomyocytes were of significantly smaller amplitude and with slower maximal upstroke velocity. Better caffeine-induced calcium handling kinetics in hESC-CMs indicates a higher sacroplasmic recticulum calcium store. Furthermore, in contrast with hESC-derived cardiomyocytes, ryanodine did not reduce the amplitudes, maximal upstroke and decay velocity of calcium transients of hiPSC-derived cardiomyocytes. In addition, spatial inhomogeneity in temporal properties of calcium transients across the width of cardiomyocytes was more pronounced in hiPSC-derived cardiomyocytes than their hESC counterpart as revealed line-scan calcium imaging. Expressions of the key calcium-handling proteins including ryanodine recptor-2 (RyR2), sacroplasmic recticulum calcium-ATPase (SERCA), junction (Jun) and triadin (TRDN), were significantly lower in hiPSC than in hESCs.

conclusionsThe results indicate the calcium handling properties of hiPSC-derived cardiomyocytes are relatively immature to hESC counterparts.

Indexed as

HomeostasisCaffeineCalciumCarrier ProteinsCell Culture TechniquesCell DifferentiationCell LineEmbryonic Stem CellsHumansInduced Pluripotent Stem CellsMuscle ProteinsMyocytes, CardiacReverse Transcriptase Polymerase Chain ReactionRyanodineRyanodine Receptor Calcium Release ChannelSarcoplasmic ReticulumCaffeineCalciumCarrier ProteinsMuscle ProteinsRyanodineRyanodine Receptor Calcium Release ChannelSarcoplasmic Reticulum Calcium-Transporting ATPasesTRDN protein, human

Identifiers

PMID21614516
PMCPMC3226695
OpenAlexW2082135380

What OpenQuestion holds

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LicenceCC BY-NC
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.