Heparanase interacts with resistin and augments its activity.
In an attempt to isolate a heparanase receptor, postulated to mediate non-enzymatic functions of the heparanase protein, we utilized human urine collected from healthy volunteers. Affinity chromatography of this rich protein source on immobilized heparanase revealed resistin as a heparanase binding protein. Co-immunoprecipitation and ELISA further confirmed the interaction between heparanase and resistin. Importantly, we found that heparanase potentiates the bioactivity of resistin in its standard bioassay in which monocytic human leukemia cell line, THP1, differentiates into adherent macrophage-like foam cells. It is thus conceivable that this newly identified complex of heparanase and resistin exerts a stimulatory effect also in various inflammatory conditions known to be affected by the two proteins.
Department of Molecular Genetics, The Weizmann Institute of Science, Rehovot, Israel.
Daniela
D
Novick
Department of Molecular Genetics, The Weizmann Institute of Science, Rehovot, Israel.
Sara
S
Barak
Cancer and Vascular Biology Research Center, The Rappaport Faculty of Medicine, Technion, Haifa, Israel.
Neta
N
Ilan
Cancer and Vascular Biology Research Center, The Rappaport Faculty of Medicine, Technion, Haifa, Israel.
Israel
I
Vlodavsky
D000818:Animals; D016466:CHO Cells; D002454:Cell Differentiation / Q000187:drug effects; D002846:Chromatography, Affinity; D006224:Cricetinae; D003412:Cricetulus; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D005966:Glucuronidase / Q000302:isolation & purification / Q000378:metabolism* / Q000652:urine; D057809:HEK293 Cells; D006801:Humans; D047468:Immunoprecipitation; D011485:Protein Binding / Q000187:drug effects; D052243:Resistin / Q000378:metabolism*; D016622:Silver Staining; D020349:Surface Plasmon Resonance; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology; D000099175:Heparanase
D005966:Glucuronidase; D052243:Resistin; D013755:Tetradecanoylphorbol Acetate; D000099175:Heparanase