Evidence map›Paper›PMID 12117413›Full record

ArticleThe Biochemical journal2002

A novel cycling assay for nicotinic acid-adenine dinucleotide phosphate with nanomolar sensitivity.

Richard Graeff, Hon Cheung Lee

Open access · bronzeAbstract read
In one paragraph

Article in The Biochemical journal, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
1.1field-weighted citation impact, top 26% 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

23 citing papers in PubMed, 61 citations in OpenAlex.

  1. Article
  2. Review
  3. Article
  4. NAADP Receptors.Cold Spring Harbor perspectives in biology · 2019
    Review
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Review
  14. NAADP receptors.Cold Spring Harbor perspectives in biology · 2011
    Review
  15. Article
  16. Review
  17. Article
  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

2 authors at 1 institution in 1 country.

Richard GraeffDepartment of Pharmacology, 321 Church Street SE, 4-145 Jackson Hall, University of Minnesota, Minneapolis, MN 55455, U.S.A.
Hon Cheung Lee
University of Minnesota · US

Funding

Structure and Functions of CD38R01GM061568 · NIGMS · UNIVERSITY OF MINNESOTA TWIN CITIES · PI GRAEFF, RICHARD M · 2000 to 2009
$2.7M
MECHANISM OF CALCIUM MOBILIZATIONR01HD017484 · NICHD · UNIVERSITY OF MINNESOTA TWIN CITIES · PI LEE, HONCHEUNG · 1985 to 2000
$254k
NICHD NIH HHS HD17484NIGMS NIH HHS GM61568
6 · The paper itself

Abstract

Nicotinic acid-adenine dinucleotide phosphate (NAADP) is a novel nucleotide derived from NADP that has now been shown to be active in releasing Ca(2+) from intracellular stores in a wide variety of cells ranging from plant to human. Despite the obvious importance of monitoring its cellular levels under various physiological conditions, no assay has been reported for NAADP to date. In the present study, a widely applicable assay for NAADP with high sensitivity is described. NAADP was first dephosphorylated to nicotinic acid-adenine dinucleotide by treatment with alkaline phosphatase. The conversion was shown to be stoichiometric. NMN-adenylyltransferase was then used to convert nicotinic acid-adenine dinucleotide into NAD in the presence of high concentrations of NMN. The resultant NAD was amplified by a cycling assay involving alcohol dehydrogenase and diaphorase. Each time NAD cycled through these coupled reactions, a molecule of highly fluorescent resorufin was generated. The reaction could be performed for hours, resulting in more than a 1000-fold amplification. Concentrations of NAADP over the 10-20 nM range could be routinely measured. This novel cycling assay was combined with an enzymic treatment to provide the necessary specificity for the assay. NAADP was found to be resistant to NADase and apyrase. Pretreatment of samples with a combination of the hydrolytic enzymes completely eliminated the interference from common nucleotides. The versatility of the cycling assay can also be extended to measure nicotinic acid, which is a substrate in the synthesis of NAADP catalysed by ADP-ribosyl cyclase, over the micromolar range. All the necessary reagents for the cycling assay are widely available and it can be performed using a multi-well fluorescence plate reader, providing a high-throughput method. This is the first assay reported for NAADP and nicotinic acid, which should be valuable in elucidating the messenger functions of NAADP.

Indexed as

Alcohol DehydrogenaseAlkaline PhosphataseBiochemistryCalciumDose-Response Relationship, DrugFungal ProteinsModels, ChemicalNADNADPNiacinPhosphorylationSignal TransductionTime FactorsAlcohol DehydrogenaseAlkaline PhosphataseCalciumFungal ProteinsNAADPNADNADPNiacin

Identifiers

PMID12117413
PMCPMC1222877
OpenAlexW2063679416

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.