eISSN: 1644-4124
ISSN: 1426-3912
Central European Journal of Immunology
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2/2018
vol. 43
 
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abstract:
Review paper

Can components of the plasminogen activation system predict the outcome of kidney transplants?

Jerzy Jankun
,
Omar A. Khan
,
Hesham I. Mostafa
,
Puneet Sindhwani
,
Ewa Skrzypczak-Jankun

(Centr Eur Immunol 2018; 43 (2): 222-230)
Online publish date: 2018/06/30
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Proteolytic and antiproteolytic enzymes play a critical role in the physiology and pathology of different stages of human life. One of the important members of the proteolytic family is the plasminogen activation system (PAS), which includes several elements crucial for this review: the 50 kDa glycoprotein plasminogen activator inhibitor 1 (PAI-1) that inhibits tissue-type (tPA) and urokinase-type plasminogen activator (uPA). These two convert plasminogen into its active form named plasmin that can lyse a broad spectrum of proteins. Urokinase receptor (uPAR) is the binding site of uPA. This glycoprotein on the cell surface facilitates urokinase activation of plasminogen, creating high proteolytic activity close to the cell surface. PAS activities have been reported to predict the outcome of kidney transplants. However, reports on expression of PAS in kidney transplants seem to be controversial. On the one hand there are reports that impaired proteolytic activity leads to induction of chronic allograft nephropathy, while on the other hand treatment with uPA and tPA can restore function of acute renal transplants. In this comprehensive review we describe the complexity of the PAS as well as biological effects of the PAS on renal allografts, and provide a possible explanation of the reported controversy.
keywords:

kidney transplantation, plasminogen, urokinase, tPA

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