Evidence map›Paper›PMID 15210578›Full record

ArticleBritish journal of pharmacology2004

Methylene ATP analogs as modulators of extracellular ATP metabolism and accumulation.

Sheldon M Joseph, Matthew A Pifer, Ronald J Przybylski, George R Dubyak

Open access · bronzeAbstract readComparative Study
In one paragraph

Article in British journal of pharmacology, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed
2.6field-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

30 citing papers in PubMed, 73 citations in OpenAlex.

  1. Article
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  7. Review
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  12. Article
  13. Extracellular pyrophosphate metabolism and calcification in vascular smooth muscle.American journal of physiology. Heart and circulatory physiology · 2011
    Article
  14. Article
  15. Article
  16. Article
  17. Quantification of extracellular UDP-galactose.Analytical biochemistry · 2010
    Article
  18. ATP release from non-excitable cells.Purinergic signalling · 2009
    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

4 authors at 1 institution in 1 country.

Sheldon M JosephDepartment of Physiology and Biophysics, E565, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA.
Matthew A Pifer
Ronald J Przybylski
George R Dubyak
Case Western Reserve University · US

Funding

TIME RESOLVED X RAY INTERFEROMETRY AND SARCOPLASMIC RETICULUM CALCIUM ATPASEP01HL018708 · NHLBI · UNIVERSITY OF PENNSYLVANIA · PI SCARPA, ANTONIO · 1985 to 2006
$6.6M
NHLBI NIH HHS P01 HL018708NHLBI NIH HHS P01-HL18708
6 · The paper itself

Abstract

1 Transient accumulation of extracellular ATP reflects both release of ATP from intracellular stores and altered rates of ATP metabolism by ecto-enzymes. Ecto-nucleoside triphosphate diphosphohydrolases (eNTPDases) and ecto-nucleotide pyrophosphatases (eNPPs) degrade ATP, while ecto-nucleotide diphosphokinases (eNDPKs) synthesize ATP from ambient ADP. 2 Although the methylene ATP analogs betagamma-meATP and alphabeta-meATP are widely used as metabolically stable tools for the analysis of purinergic signaling, their specific effects on eNTPDase, eNPP, and eNDPK activities have not been defined. This study compared the actions of these analogs on extracellular ATP metabolism by human 1321N1 astrocytes, rat PC12 pheochomocytoma cells, and rat C6 glioma cells. 3 Both analogs significantly reduced clearance of extracellular ATP by 1321N1 cells that express both eNTPDases and eNPPs, as well as by C6 cells that exclusively express eNPPs. In contrast, both analogs were much less efficacious in inhibiting ATP clearance by PC12 cells that predominantly express eNTPDases. Betagamma-meATP, but not alphabeta-meATP, was effectively hydrolyzed by the 1321N1 and C6 cells; PC12 cells did not significantly degrade this analog. 4 Alphabeta-meATP, but not betagamma-meATP, acted as a substrate for purified yeast NDPK to generate ATP via trans-phosphorylation of ADP. alphabeta-meATP also acted as substrate for the eNDPK activities expressed by 1321N1, PC12, and C6 cells and thereby induced extracellular ATP accumulation in the presence of ambient or exogenously added ADP. 5 These results indicate that methylene ATP analogs exert complex and cell-specific effects on extracellular ATP metabolism that can significantly modify interpretation of studies that use these reagents as probes of purinergic signal transduction in intact tissues.

Indexed as

Adenosine DiphosphateAdenosine TriphosphatasesAdenosine TriphosphateAnimalsCell Line, TumorExtracellular SpaceHumansModels, BiologicalPC12 CellsPhosphotransferasesPyrophosphatasesRatsSubstrate SpecificityTime FactorsAdenosine DiphosphateAdenosine TriphosphatasesAdenosine Triphosphatenucleoside triphosphate diphosphohydrolase 6nucleotide pyrophosphatasePhosphotransferasesPyrophosphatases

Identifiers

PMID15210578
PMCPMC1575113
OpenAlexW1981799323

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.