Tryptase, a novel angiogenic factor stored in mast cell granules.

Domenico Ribatti, Girolamo Ranieri

Experimental cell research 2015 Mar 15

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Human mast cells (MCs) are a rich reservoir of neutral proteases, packed in large amounts in their granules and comprising a high fraction of all cellular proteins. Among these proteases, tryptase is involved in angiogenesis after its release from activated MC granules, as it has been demonstrated in different in vitro and in vivo assays. Moreover, tryptase-positive MCs increase in number and vascularization increases in a linear fashion in different solid and hematological tumors. This complex interplay between MCs and tumor angiogenesis have led to consider the therapeutic use of angiogenesis inhibitors, which specifically target the angiogenic activity of tryptase, such as gabexate mesilate and nafamostat mesilate, two inhibitors of trypsin-like serine proteases. Copyright © 2014 Elsevier Inc. All rights reserved.

Citation

Domenico Ribatti, Girolamo Ranieri. Tryptase, a novel angiogenic factor stored in mast cell granules. Experimental cell research. 2015 Mar 15;332(2):157-62