Cited by 245Blood Coagulation and Thrombosis MechanismsProtease and Inhibitor MechanismsCoagulation, Bradykinin, Polyphosphates, and Angioedema

Clearance of Tissue Plasminogen Activator (TPA) and TPA/Plasminogen Activator Inhibitor Type 1 (PAI-1) Complex: Relationship to Elevated TPA Antigen in Patients With High PAI-1 Activity Levels

Chandler, W. L., Alessi, M. C., Aillaud, M. F., Henderson, P., Vague, P., Juhan-Vague, I.·1997·Circulation

Abstract

Background To evaluate the effect of plasminogen activator inhibitor type 1 (PAI-1) levels on the clearance of total tissue plasminogen activator (TPA) antigen, we studied the clearance of active TPA and TPA/PAI-1 complex in subjects with low (181±109 pmol/L; n=7) and high (1166±322 pmol/L; n=4) baseline active PAI-1. Methods and Results A 5-μg/kg bolus of TPA was infused over a 15-second period followed by measurement of TPA activity, TPA antigen, TPA/PAI-1, TPA/C1 inhibitor, PAI-1 activity, and PAI-1 antigen over a 4-hour period. α-Phase clearance of total TPA antigen was faster in subjects with low PAI-1 (t 1/2 of 3.5±0.7 minutes) versus high PAI-1 (t 1/2 of 5.3±0.9 minutes) ( P =.006). Clearance of all factors was best fit by a two-compartment pharmacokinetic model based on a computer-simulated human circulatory system. The average hepatic clearance fraction in the two-compartment model was greater for active TPA (89±10%, t 1/2 of 2.4±0.3 minutes) than for TPA/PAI-1 complex (48±17%, t 1/2 of 5.0±1.8 minutes) ( P =.0006). Conclusions Plasma clearance of active TPA was faster than clearance of TPA/PAI-1 complex. High levels of active PAI-1 converted more TPA into TPA/PAI-1 complex, effectively slowing the clearance of total TPA antigen and explaining in part why high levels of PAI-1 activity are associated with increases in total TPA antigen.

Integrity signals

Registry

Crossref · 10.1161/01.cir.96.3.761

Cites

54 of 54 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • T-PA antigen levels are associated with increased risk of thrombotic events, but this is largely because 80% of t-PA antigen circulates complexed to PAI-1.

    “T-PA antigen levels are also associated with increased risk of thrombotic events, but this is largely because 80% of t-PA antigen circulates complexed to PAI-1.”

    From The Vasculature in Prediabetes (2018) · cites this paper as [124]

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Chandler, W. L., Alessi, M. C., Aillaud, M. F., Henderson, P., Vague, P., & Juhan-Vague, I.
Affiliations
Inserm (FR)
Venue
Circulation
Published
1997-08-05
Volume
96
Issue
3
Pages
761-768
ISSN
  • 0009-7322 (ISSN-L)
  • 1524-4539
OpenAlex
W1998362943
Cited by
245
References
54
Citations by year
2026: 6 · 2025: 9 · 2024: 7 · 2023: 7 · 2022: 10 · 2021: 11 · 2020: 9 · 2019: 5 · 2018: 4 · 2017: 4 · 2016: 14 · 2015: 5 · 2014: 8 · 2013: 9 · 2012: 6
FWCI
6.72
Type
journal article
Language
en
Open access
closed
Locations
  • Circulation (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Hematology › Blood Coagulation and Thrombosis Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Protease and Inhibitor Mechanisms
  • Health Sciences › Medicine › Genetics › Coagulation, Bradykinin, Polyphosphates, and Angioedema
Keywords
tissue plasminogen activator, plasminogen activator inhibitor-1, t-PA/PAI-1 complex, plasma clearance, pharmacokinetics, hepatic clearance, fibrinolysis, two-compartment model
MeSH terms
Adult, Antigens, Computer Simulation, Female, Humans, Male, Middle Aged, Models, Biological, Tissue Plasminogen Activator, Plasminogen Activator Inhibitor 1

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review