Cited by 182Mast cells and histamineProtease and Inhibitor MechanismsBlood Coagulation and Thrombosis Mechanisms

Pericellulars substrates of human mast cell tryptase: 72,000 Dalton gelatinase and fibronectin

Lohi, Jouko, Kesksi‐Oja, Jorma, Harvima, Ilkka·1992·Journal of Cellular Biochemistry

Abstract

Migrating cells degrade pericellular matrices and basement membranes. For these purposes cells produce a number of proteolytic enzymes. Mast cells produce two major proteinases, chymase and tryptase, whose physiological functions are poorly known. In the present study we have analyzed the ability of purified human mast cell tryptase to digest pericellular matrices of human fibroblasts. Isolated matrices of human fibroblasts and fibroblast conditioned medium were treated with tryptase, and alterations in the radiolabeled polypeptides were observed in autoradiograms of sodium dodecyl sulphate polyacrylamide gels. It was found that an M(r) 72,000 protein was digested to an M(r) 62,000 form by human mast cell tryptase while the plasminogen activator inhibitor, PAI-1, was not affected. Cleavage of the M(r) 72,000 protein could be partially inhibited by known inhibitors of tryptase but not by aprotinin, soybean trypsin inhibitor, or EDTA. Fibroblastic cells secreted the M(r) 72,000 protein into their medium and it bound to gelatin as shown by analysis of the medium by affinity chromatography over gelatin-Sepharose. The soluble form of the M(r) 72,000 protein was also susceptible to cleavage by tryptase. Analysis using gelatin containing polyacrylamide gels showed that both the intact M(r) 72,000 and the M(r) 62,000 degraded form of the protein possess gelatinolytic activity after activation by sodium dodecyl sulphate. Immunoblotting analysis of the matrices revealed the cleavage of an immunoreactive protein of M(r) 72,000 indicating that the protein is related to type IV collagenase. Further analysis of the pericellular matrices indicated that the protease sensitive extracellular matrix protein fibronectin was removed from the matrix by tryptase in a dose-dependent manner. Fibronectin was also susceptible to proteolytic degradation by tryptase. The data suggest a role for mast cell tryptase in the degradation of pericellular matrices.

Integrity signals

Registry

Crossref · 10.1002/jcb.240500402

Cites

57 of 57 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?

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Lohi, J., Kesksi‐Oja, J., & Harvima, I.
Affiliations
  • University of Helsinki (FI)
  • University of Eastern Finland (FI)
Venue
Journal of Cellular Biochemistry
Publisher
Wiley
Published
1992-12
Volume
50
Issue
4
Pages
337-349
ISSN
  • 0730-2312 (ISSN-L)
  • 1097-4644
OpenAlex
W2088521868
Cited by
182
References
57
Citations by year
2026: 2 · 2022: 2 · 2021: 4 · 2020: 2 · 2019: 4 · 2018: 5 · 2017: 2 · 2016: 5 · 2015: 2 · 2014: 3 · 2013: 3 · 2012: 4
FWCI
1.45
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Cellular Biochemistry (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Mast cells and histamine
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Protease and Inhibitor Mechanisms
  • Health Sciences › Medicine › Hematology › Blood Coagulation and Thrombosis Mechanisms
Keywords
tryptase, type IV collagenase, fibronectin, gelatinase, extracellular matrix proteolysis, fibroblast-conditioned medium, plasminogen activator inhibitor-1, tryptase inhibitors, basement membrane degradation
MeSH terms
Cell Line, Edetic Acid, Electrophoresis, Polyacrylamide Gel, Embryo, Mammalian, Fibroblasts, Fibronectins, Humans, Lung, Mast Cells, Metalloendopeptidases, Molecular Weight, Peptide Fragments, Protease Inhibitors, Serine Endopeptidases, Substrate Specificity, Gelatinases, Matrix Metalloproteinase 2, Tryptases, Chymases

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