Evidence map›Paper›PMID 24818532›Full record

ArticleJournal of thrombosis and haemostasis : JTH2014

Improved hemostasis in hemophilia mice by means of an engineered factor Va mutant.

A von Drygalski, T J Cramer, V Bhat, J H Griffin, A J Gale, L O Mosnier

Open access · bronzeAbstract read
In one paragraph

Article in Journal of thrombosis and haemostasis : JTH, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
1.9field-weighted citation impact, top 14% 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

20 citing papers in PubMed, 30 citations in OpenAlex.

  1. Article
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  6. Review
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  8. Cardiac Myosin Promotes Thrombin Generation and Coagulation In Vitro and In Vivo.Arteriosclerosis, thrombosis, and vascular biology · 2020
    Article
  9. Review
  10. Article
  11. Protein-Engineered Coagulation Factors for Hemophilia Gene Therapy.Molecular therapy. Methods & clinical development · 2019
    Review
  12. Article
  13. Article
  14. Novel alternate hemostatic agents for patients with inhibitors: beyond bypass therapy.Hematology. American Society of Hematology. Education Program · 2017
    Review
  15. Article
  16. Article
  17. Article
  18. Review
  19. Review
  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

6 authors at 1 institution in 1 country.

A von DrygalskiDepartment of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, CA, USA; Division of Hematology/Oncology, Department of Medicine, University California San Diego, San Diego, CA, USA.
T J Cramer
V Bhat
J H Griffin
A J Gale
L O Mosnier
Scripps Research Institute · US

Funding

THROMBUS FORMATION IN BABOONSP01HL031950 · NHLBI · SCRIPPS RESEARCH INSTITUTE, THE · PI GRIFFIN, JOHN H · 1985 to 2015
$29.4M
Structure and Function of Protein CR01HL052246 · NHLBI · SCRIPPS RESEARCH INSTITUTE, THE · PI GRIFFIN, JOHN H · 2005 to 2017
$9.6M
PROTEINS OF COAGULATION PATHWAYSR01HL021544 · NHLBI · SCRIPPS RESEARCH INSTITUTE, THE · PI GRIFFIN, JOHN H · 1985 to 2014
$7.5M
Structure-function of cytoprotective coagulation proteases and their receptorsR01HL104165 · NHLBI · SCRIPPS RESEARCH INSTITUTE, THE · PI MOSNIER, LAURENT OLIVIER · 2011 to 2024
$6.1M
NHLBI NIH HHS P01 HL031950NHLBI NIH HHS P01HL031950NHLBI NIH HHS R01 HL021544NHLBI NIH HHS R01HL021544NHLBI NIH HHS R01 HL052246NHLBI NIH HHS R01HL052246NHLBI NIH HHS R01 HL104165NHLBI NIH HHS R01HL104165
6 · The paper itself

Abstract

backgroundFactor (F)VIIa-based bypassing not always provides sufficient hemostasis in hemophilia.

objectivesTo investigate the potential of engineered activated factor V (FVa) variants as bypassing agents in hemophilia A.

methodsActivity of FVa variants was studied in vitro using prothrombinase assays with purified components and in FV- and FVIII-deficient plasma using clotting and thrombin generation assays. In vivo bleed reduction after the tail clip was studied in hemophilia A mice. RESULTS AND

conclusionsFVa mutations included a disulfide bond connecting the A2 and A3 domains and ones that rendered FVa resistant to inactivation by activated protein C (APC). '(super) FVa,' a combination of the A2-A3 disulfide (A2-SS-A3) to stabilize FVa and of APC-cleavage site mutations (Arg506/306/679Gln), had enhanced specific activity and complete APC resistance compared with wild-type FVa, FVL eiden (Arg506Gln), or FVaL eiden (A2-SS-A3). Furthermore, (super) FVa potently increased thrombin generation in vitro in FVIII-deficient plasma. In vivo, (super) FVa reduced bleeding in FVIII-deficient mice more effectively than wild-type FVa. Low-dose (super) FVa, but not wild-type FVa, decreased early blood loss during the first 10 min by more than two-fold compared with saline and provided bleed protection for the majority of mice, similar to treatments with FVIII. During the second 10 min after tail cut, (super) FVa at high dose, but not wild-type FVa, effectively reduced bleeding. These findings suggest that (super) FVa enhances not only clot formation but also clot stabilization. Thus, (super) FVa efficiently improved hemostasis in hemophilia in vitro and in vivo and may have potential therapeutic benefits as a novel bypassing agent in hemophilia.

Indexed as

MutationAnimalsBlood CoagulationDisulfidesFactor VaHemophilia AHemostasisHumansMiceMice, TransgenicPartial Thromboplastin TimeProtein CProtein EngineeringProthrombin TimeRecombinant ProteinsThrombinDisulfidesFactor VaProtein CRecombinant ProteinsThrombinThromboplastinanimal experimentationbleedingfactor Vhemophiliahemostasis

Identifiers

PMID24818532
PMCPMC4161283
OpenAlexW2072548941

What OpenQuestion holds

Textmetadata
LicenceTDM
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.