Evidence map›Paper›PMID 19190246›Full record

ArticleBlood2009

Loss of pleckstrin defines a novel pathway for PKC-mediated exocytosis.

Lurong Lian, Yanfeng Wang, Matthew Flick, John Choi, Edward W Scott, Jay Degen, Mark A Lemmon, Charles S Abrams

Open access · bronzeAbstract read
In one paragraph

Article in Blood, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed
3.0field-weighted citation impact, top 9% 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

29 citing papers in PubMed, 55 citations in OpenAlex.

  1. Differential Regulation of Granule Release in Platelets and Immune Cells.TH open : companion journal to thrombosis and haemostasis · 2026
    Article
  2. Materials today. Bio · 2025
    Article
  3. Article
  4. Article
  5. Review
  6. Review
  7. Article
  8. DMAG, a novel countermeasure for the treatment of thrombocytopenia.Molecular medicine (Cambridge, Mass.) · 2021
    Article
  9. Article
  10. Emerging Roles of Pleckstrin-2 Beyond Cell Spreading.Frontiers in cell and developmental biology · 2021
    Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Review
  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 3 institutions in 1 country.

Lurong LianDepartment of Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA
Yanfeng Wang
Matthew Flick
John Choi
Edward W Scott
Jay Degen
Mark A Lemmon
Charles S Abrams
University of Pennsylvania · USUniversity of Cincinnati Medical Center · USUniversity of Florida Health Science Center · US

Funding

Subcellular Mechanisms pf Platelet ActivationP01HL040387 · NHLBI · UNIVERSITY OF PENNSYLVANIA · PI BENNETT, JOEL S. · 1988 to 2018
$35.5M
The roles of pleckstrin and pleckstrin-2 in platelet biologyR01HL083392 · NHLBI · UNIVERSITY OF PENNSYLVANIA · PI ABRAMS, CHARLES S. · 2006 to 2013
$3.2M
Actin assembly in platelets &megakaryocytesR01HL073289 · NHLBI · UNIVERSITY OF PENNSYLVANIA · PI ABRAMS, CHARLES S. · 2005 to 2008
$1.3M
NHLBI NIH HHS HL073289NHLBI NIH HHS HL083392NHLBI NIH HHS HL40387NHLBI NIH HHS P01 HL040387NHLBI NIH HHS R01 HL073289NHLBI NIH HHS R01 HL083392
6 · The paper itself

Abstract

Pleckstrin, the platelet and leukocyte C kinase substrate, is a prominent substrate of PKC in platelets, monocytes, macrophages, lymphocytes, and granulocytes. Pleckstrin accounts for 1% of the total protein in these cells, but it is best known for containing the 2 prototypic Pleckstrin homology, or PH, domains. Overexpressed pleckstrin can affect polyphosphoinositide second messenger-based signaling events; however, its true in vivo role has been unknown. Here, we describe mice containing a null mutation within the pleckstrin gene. Platelets lacking pleckstrin exhibit a marked defect in exocytosis of delta and alpha granules, alphaIIbbeta3 activation, actin assembly, and aggregation after exposure to the PKC stimulant, PMA. Pleckstrin-null platelets aggregate normally in response to thrombin, but they fail to aggregate in response to thrombin in the presence of PI3K inhibitors, suggesting that a PI3K-dependent signaling pathway compensates for the loss of pleckstrin. Although pleckstrin-null platelets merged their granules in response to stimulation of PKC, they failed to empty their contents into the open canalicular system. This might be attributable to impaired actin assembly present in cells lacking pleckstrin. These data show that pleckstrin regulates the fusion of granules to the cell membrane and is an essential component of PKC-mediated exocytosis.

Indexed as

ActinsAnimalsBlood PlateletsBlood ProteinsCytoplasmic GranulesExocytosisMembrane FusionMiceMice, Inbred C57BLMutagenesisPhosphatidylinositol 3-KinasesPhosphoproteinsPlatelet ActivationProtein Kinase CSignal TransductionActinsBlood ProteinsPhosphatidylinositol 3-KinasesPhosphoproteinsplatelet protein P47Protein Kinase C

Identifiers

PMID19190246
PMCPMC2668855
OpenAlexW2010734646

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.