Evidence map›Paper›PMID 19943873›Full record

ArticleJournal of thrombosis and haemostasis : JTH2010

Bio-distribution of pharmacologically administered recombinant factor VIIa (rFVIIa).

R Gopalakrishnan, U Hedner, S Ghosh, R C Nayak, T C Allen, U R Pendurthi, L V M Rao

Open access · bronzeAbstract read
In one paragraph

Article in Journal of thrombosis and haemostasis : JTH, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
4.4field-weighted citation impact, top 5% 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

24 citing papers in PubMed, 62 citations in OpenAlex.

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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

7 authors at 2 institutions in 2 countries.

R GopalakrishnanCenter for Biomedical Research, The University of Texas Health Science Center, Tyler, TX 75703, USA.
U Hedner
S Ghosh
R C Nayak
T C Allen
U R Pendurthi
L V M Rao
The University of Texas Health Science Center at Tyler · USLund University · SE

Funding

INITIATION AND REGULATION OF BLOOD COAGULATIONR01HL058869 · NHLBI · UNIVERSITY OF TEXAS HLTH CTR AT TYLER · PI LELLA, VIJAYA MOHAN RAO · 1998 to 2010
$2.3M
Tissue Factor-factor Vlla signalingR01HL065500 · NHLBI · UNIVERSITY OF TEXAS HLTH CTR AT TYLER · PI PENDURTHI, USHA R · 2001 to 2010
$1.8M
NHLBI NIH HHS HL58869NHLBI NIH HHS HL65500NHLBI NIH HHS R01 HL058869NHLBI NIH HHS R01 HL065500
6 · The paper itself

Abstract

backgroundRecent clinical studies suggest that the prophylactic use of recombinant factor VIIa (rFVIIa) markedly reduces the number of bleeding episodes in hemophilic patients with inhibitors. Given the short biological half-life of rFVIIa, it is unclear how rFVIIa could be effective in prophylactic treatment.

objectivesTo examine the extravascular distribution of pharmacologically administered rFVIIa to obtain clues on how rFVIIa could work in prophylaxis.

methodsRecombinant mouse FVIIa tagged with AF488 fluorophore (AF488-FVIIa) was administered into mice via the tail vein. At different time intervals following the administration, mice were exsanguinated and various tissues were collected. The tissue sections were processed for immunohistochemistry to evaluate distribution of rFVIIa.

resultsrFVIIa, immediately following the administration, associated with the endothelium lining of large blood vessels. Within 1 h, rFVIIa bound to endothelial cells was transferred to the perivascular tissue surrounding the blood vessels and thereafter diffused throughout the tissue. In the liver, rFVIIa was localized to sinusoidal capillaries and accumulated in hepatocytes. In bone, rFVIIa was accumulated in the zone of calcified cartilage and some of it was retained there for a week. The common finding of the present study is that rFVIIa in extravascular spaces was mostly localized to regions that contain TF expressing cells.

conclusionsThe present study demonstrates that pharmacologically administered rFVIIa readily associates with the vascular endothelium and subsequently enters into extravascular spaces where it is likely to bind to TF and is retained for extended time periods. This may explain the prolonged pharmacological effect of rFVIIa.

Indexed as

AnimalsBone and BonesCoagulantsDiffusionEndothelium, VascularFactor VIIaFluorescent DyesImmunohistochemistryInjections, IntravenousLiverMaleMiceMice, Inbred C57BLProtein BindingRecombinant ProteinsThromboplastinCoagulantsFactor VIIaFluorescent Dyesrecombinant FVIIaRecombinant ProteinsThromboplastin

Identifiers

PMID19943873
PMCPMC2849270
OpenAlexW2013468587

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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.