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Characterization of Human Prostate Mast Cells and Their Increase in Periprostatic Vein Thrombosis

Hans C. Bankl MD, Puchit Samorapoompichit MD, Branko Pikula MD, Ljiljana Latinovic MD, Hans Bankl MD, Klaus Lechner MD, Peter Valent MD
DOI: http://dx.doi.org/10.1309/C0TP-MA3M-K5FX-3Q2F 97-106 First published online: 1 July 2001


Recent data suggest that mast cells (MCs) and their products are involved in the pathophysiology of thrombosis. In the present study, we analyzed the number, distribution, and phenotype of prostate MCs and periprostatic MCs in patients with unilateral periprostatic vein thrombosis (PVT) by immunohistochemical analysis and electron microscopy. MCs reacted with monoclonal antibodies to tryptase, chymase, and c-kit/CD117 and stained positively for tissue-type plasminogen activator (tPA) and urokinase receptor (uPAR/CD87) but did not express detectable urokinase (uPA) or plasminogen activator inhibitors (PAI-1, PAI-2). We found an increase in the mean ± SEM number of MCs in PVT compared with control (PVT, 14.36 ± 1.57 vs control, 5.23 ± 0.57/mm2). The majority of MCs accumulated in the adventitia of thrombosed veins and showed a decrease in chymase expression. As MCs increase in number in PVT and express a profibrinolytic phenotype, we hypothesize that MC-derived molecules have a role in endogenous fibrinolysis.

Key Words:
  • Prostate mast cells
  • Periprostatic vein thrombosis
  • Fibrinolysis