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Plasminogen activation in psoriasis.

T Lotti1, P Bonan, E Panconesi

  • 1Department of Dermatology, University of Florence, Italy.

Acta Dermato-Venereologica. Supplementum
|January 1, 1989
PubMed
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Psoriatic epidermis exhibits abnormal plasminogen activator activity, primarily from tissue-type plasminogen activator. Topical treatments effectively reversed this activity and normalized protein localization, suggesting a key role in psoriasis development.

Area of Science:

  • Biochemistry
  • Dermatology
  • Physiology

Background:

  • Plasminogen activation is a critical physiological process involving the conversion of plasminogen to plasmin by plasminogen activators.
  • Urokinase (uPA) and tissue-type plasminogen activator (tPA) are the primary activators in this system.
  • Dysregulation of this pathway is implicated in various pathological conditions.

Purpose of the Study:

  • To investigate plasminogen activation system abnormalities in psoriatic epidermis.
  • To determine the effect of topical treatments on this aberrant activity and protein localization.
  • To elucidate the role of plasminogen activation in the pathogenesis of psoriasis.

Main Methods:

  • Assessing plasminogen activator activity in psoriatic epidermis.

Related Experiment Videos

  • Utilizing immunohistochemistry to examine the localization of plasminogen, uPA, and tPA.
  • Evaluating the impact of topical anthralin and betamethasone valerate cream treatments.

    • Main Results:

    • Psoriatic epidermis demonstrated significantly elevated plasminogen activator activity, predominantly mediated by tPA.
    • Abnormal immunohistochemical localization of plasminogen, uPA, and tPA was observed in psoriatic skin.
    • Topical treatments with anthralin and betamethasone valerate normalized both the enzymatic activity and protein distribution.

    Conclusions:

    • Plasminogen activation is significantly altered in psoriasis, with a notable contribution from tPA.
    • Topical therapies can effectively modulate this dysregulated system in psoriatic skin.
    • These findings highlight plasminogen activation as a potential therapeutic target in psoriasis management.