Neutrophil inhibitors
AssigneeCorvas International, Inc.
InventorsMatthew Moyle, David L. Foster, George P. Vlasuk
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Abstract
Compositions enriched for Neutrophil Inhibitory Factor which inhibit neutrophil activity including adhesion to vascular endothelial cells are provided. Such compositions may comprise a glycoprotein isolated from nematodes, particularly of the genus Ancylostoma. These compositions are useful in the therapy of conditions which involve abnormal or undesired inflammatory responses.
Claims4
A glycoprotein isolated from Ancylostoma canium which has an apparent molecular weight of about 38,000 to 44,000 Daltons as determined by laser-desorption time-of-flight mass-spectrometry;
- and an isoelectric point of about 4.5 as determined by preparative isoelectric focusing and which has neutrophil inhibitory activity.
A method of preparing a composition enriched for Neutrophil Inhibitory Factor from a homogenate of a parasitic worm of the genus Ancylostoma that has neutrophil inhibitory activity which comprises (a) subjecting the homogenate to chromatography on Concanavalin-A, (b) subjecting the material having neutrophil inhibitory activity from step (a) to chromatography on gel filtration media comprising a matrix of cross-linked agarose and dextran having a separation range of 10 to 600 KD, and (c) subjecting the material having neutrophil inhibitory activity from step (b) to column chromatography on hydroxyapatite.
Dependencies are inferred from the claim text.