Evidence map›Paper›PMID 19955484›Full record

ArticleAmerican journal of physiology. Cell physiology2010

Electrophysiological properties of human induced pluripotent stem cells.

Peng Jiang, Stephanie N Rushing, Chi-wing Kong, Jidong Fu, Deborah Kuo-Ti Lieu, Camie W Chan, Wenbin Deng, Ronald A Li

Abstract readComparative Study
In one paragraph

Article in American journal of physiology. Cell physiology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed
2.4field-weighted citation impact, top 11% 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

31 citing papers in PubMed, 56 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Review
  5. Article
  6. Review
  7. Article
  8. Review
  9. Article
  10. Article
  11. Article
  12. Article
  13. Review
  14. Article
  15. Article
  16. Article
  17. Review
  18. Article
  19. Article
  20. Article
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 2 institutions in 2 countries.

Peng JiangInstitute of Pediatric Regenerative Medicine, Shriners Hospital for Children of North America, Sacramento, CA, USA.
Stephanie N Rushing
Chi-wing Kong
Jidong Fu
Deborah Kuo-Ti Lieu
Camie W Chan
Wenbin Deng
Ronald A Li
Molecular Biology Consortium · USUniversity of California, Davis · US

Funding

Molecular Physiology of the Pacemaker ChannelsR01HL072857 · NHLBI · UNIVERSITY OF CALIFORNIA AT DAVIS · PI LI, RONALD A · 2004 to 2013
$3.4M
Oligodendrocytes, Glutamate Receptors, and Lead NeurotoxicityR01ES015988 · NIEHS · UNIVERSITY OF CALIFORNIA AT DAVIS · PI DENG, WENBIN · 2007 to 2011
$2.0M
Glutamate Receptors in Hypoxic-ischemic Injury to Developing OligodendrocytesR01NS059043 · NINDS · UNIVERSITY OF CALIFORNIA AT DAVIS · PI DENG, WENBIN · 2008 to 2012
$1.4M
NHLBI NIH HHS R01 HL072857NHLBI NIH HHS R01-HL-72857NIEHS NIH HHS R01 ES015988NIEHS NIH HHS R01-ES-015988NINDS NIH HHS R01 NS059043NINDS NIH HHS R01-NS-059043
6 · The paper itself

Abstract

Human embryonic stem cells (hESCs) can self-renew while maintaining their pluripotency. Direct reprogramming of adult somatic cells to induced pluripotent stem cells (iPSCs) has been reported. Although hESCs and human iPSCs have been shown to share a number of similarities, such basic properties as the electrophysiology of iPSCs have not been explored. Previously, we reported that several specialized ion channels are functionally expressed in hESCs. Using transcriptomic analyses as a guide, we observed tetraethylammonium (TEA)-sensitive (IC(50) = 3.3 +/- 2.7 mM) delayed rectifier K(+) currents (I(KDR)) in 105 of 110 single iPSCs (15.4 +/- 0.9 pF). I(KDR) in iPSCs displayed a current density of 7.6 +/- 3.8 pA/pF at +40 mV. The voltage for 50% activation (V(1/2)) was -7.9 +/- 2.0 mV, slope factor k = 9.1 +/- 1.5. However, Ca(2+)-activated K(+) current (I(KCa)), hyperpolarization-activated pacemaker current (I(f)), and voltage-gated sodium channel (Na(V)) and voltage-gated calcium channel (Ca(V)) currents could not be measured. TEA inhibited iPSC proliferation (EC(50) = 7.8 +/- 1.2 mM) and viability (EC(50) = 5.5 +/- 1.0 mM). By contrast, 4-aminopyridine (4-AP) inhibited viability (EC(50) = 4.5 +/- 0.5 mM) but had less effect on proliferation (EC(50) = 0.9 +/- 0.5 mM). Cell cycle analysis further revealed that K(+) channel blockers inhibited proliferation primarily by arresting the mitotic phase. TEA and 4-AP had no effect on iPSC differentiation as gauged by ability to form embryoid bodies and expression of germ layer markers after induction of differentiation. Neither iberiotoxin nor apamin had any function effects, consistent with the lack of I(KCa) in iPSCs. Our results reveal further differences and similarities between human iPSCs and hESCs. A better understanding of the basic biology of iPSCs may facilitate their ultimate clinical application.

Indexed as

Calcium ChannelsCell CycleCell DifferentiationCell LineCell ProliferationCell SurvivalCyclic Nucleotide-Gated Cation ChannelsDelayed Rectifier Potassium ChannelsDose-Response Relationship, DrugEmbryonic Stem CellsGene Expression ProfilingHumansHyperpolarization-Activated Cyclic Nucleotide-Gated ChannelsInduced Pluripotent Stem CellsKineticsMembrane PotentialsCalcium ChannelsCyclic Nucleotide-Gated Cation ChannelsDelayed Rectifier Potassium ChannelsHCN4 protein, humanHyperpolarization-Activated Cyclic Nucleotide-Gated ChannelsMuscle ProteinsPotassiumPotassium Channel BlockersPotassium ChannelsPotassium Channels, Calcium-ActivatedSodium Channels

Identifiers

PMID19955484
PMCPMC2838581
OpenAlexW2099365483

What OpenQuestion holds

Textmetadata
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.