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Neutralisation of uPA with a monoclonal antibody reduces plasmin formation and delays skin wound healing in tPA-deficient mice.

Jögi, Annika LU ; Rønø, Birgitte; Lund, Ida K; Nielsen, Boye S; Ploug, Michael; Høyer-Hansen, Gunilla; Rømer, John and Lund, Leif R (2010) In PLoS ONE 5(9). p.12746-12746
Abstract
BACKGROUND:



Proteolytic degradation by plasmin and metalloproteinases is essential for epidermal regeneration in skin wound healing. Plasminogen deficient mice have severely delayed wound closure as have mice simultaneously lacking the two plasminogen activators, urokinase-type plasminogen activator (uPA) and tissue-type plasminogen activator (tPA). In contrast, individual genetic deficiencies in either uPA or tPA lead to wound healing kinetics with no or only slightly delayed closure of skin wounds.

METHODOLOGY/PRINCIPAL FINDINGS:



To evaluate the therapeutic potential in vivo of a murine neutralizing antibody directed against mouse uPA we investigated the efficacy in skin wound healing of... (More)
BACKGROUND:



Proteolytic degradation by plasmin and metalloproteinases is essential for epidermal regeneration in skin wound healing. Plasminogen deficient mice have severely delayed wound closure as have mice simultaneously lacking the two plasminogen activators, urokinase-type plasminogen activator (uPA) and tissue-type plasminogen activator (tPA). In contrast, individual genetic deficiencies in either uPA or tPA lead to wound healing kinetics with no or only slightly delayed closure of skin wounds.

METHODOLOGY/PRINCIPAL FINDINGS:



To evaluate the therapeutic potential in vivo of a murine neutralizing antibody directed against mouse uPA we investigated the efficacy in skin wound healing of tPA-deficient mice. Systemic administration of the anti-mouse uPA monoclonal antibody, mU1, to tPA-deficient mice caused a dose-dependent delay of skin wound closure almost similar to the delayed kinetics observed in uPA;tPA double-deficient mice. Analysis of wound extracts showed diminished levels of plasmin in the mU1-treated tPA-deficient mice. Immunohistochemistry revealed that fibrin accumulated in the wounds of such mU1-treated tPA-deficient mice and that keratinocyte tongues were aberrant. Together these abnormalities lead to compromised epidermal closure.

CONCLUSIONS/SIGNIFICANCE:



Our findings demonstrate that inhibition of uPA activity with a monoclonal antibody in adult tPA-deficient mice mimics the effect of simultaneous genetic ablation of uPA and tPA. Thus, application of the murine inhibitory mU1 antibody provides a new and highly versatile tool to interfere with uPA-activity in vivo in mouse models of disease. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
PLoS ONE
volume
5
issue
9
pages
12746 - 12746
publisher
Public Library of Science
external identifiers
  • scopus:77958563278
DOI
10.1371/journal.pone.0012746
language
English
LU publication?
no
id
2691085c-e852-40c2-acd0-8a1545deb3fc (old id 3159930)
date added to LUP
2013-05-07 15:10:48
date last changed
2017-01-01 08:11:36
@article{2691085c-e852-40c2-acd0-8a1545deb3fc,
  abstract     = {BACKGROUND:<br/><br>
<br/><br>
Proteolytic degradation by plasmin and metalloproteinases is essential for epidermal regeneration in skin wound healing. Plasminogen deficient mice have severely delayed wound closure as have mice simultaneously lacking the two plasminogen activators, urokinase-type plasminogen activator (uPA) and tissue-type plasminogen activator (tPA). In contrast, individual genetic deficiencies in either uPA or tPA lead to wound healing kinetics with no or only slightly delayed closure of skin wounds.<br/><br>
METHODOLOGY/PRINCIPAL FINDINGS:<br/><br>
<br/><br>
To evaluate the therapeutic potential in vivo of a murine neutralizing antibody directed against mouse uPA we investigated the efficacy in skin wound healing of tPA-deficient mice. Systemic administration of the anti-mouse uPA monoclonal antibody, mU1, to tPA-deficient mice caused a dose-dependent delay of skin wound closure almost similar to the delayed kinetics observed in uPA;tPA double-deficient mice. Analysis of wound extracts showed diminished levels of plasmin in the mU1-treated tPA-deficient mice. Immunohistochemistry revealed that fibrin accumulated in the wounds of such mU1-treated tPA-deficient mice and that keratinocyte tongues were aberrant. Together these abnormalities lead to compromised epidermal closure.<br/><br>
CONCLUSIONS/SIGNIFICANCE:<br/><br>
<br/><br>
Our findings demonstrate that inhibition of uPA activity with a monoclonal antibody in adult tPA-deficient mice mimics the effect of simultaneous genetic ablation of uPA and tPA. Thus, application of the murine inhibitory mU1 antibody provides a new and highly versatile tool to interfere with uPA-activity in vivo in mouse models of disease.},
  author       = {Jögi, Annika and Rønø, Birgitte and Lund, Ida K and Nielsen, Boye S and Ploug, Michael and Høyer-Hansen, Gunilla and Rømer, John and Lund, Leif R},
  language     = {eng},
  number       = {9},
  pages        = {12746--12746},
  publisher    = {Public Library of Science},
  series       = {PLoS ONE},
  title        = {Neutralisation of uPA with a monoclonal antibody reduces plasmin formation and delays skin wound healing in tPA-deficient mice.},
  url          = {http://dx.doi.org/    10.1371/journal.pone.0012746},
  volume       = {5},
  year         = {2010},
}