Plasma prekallikrein activation and kallikrein production assay

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United States of America Patent

PATENT NO 6913900
APP PUB NO 20030049713A1
SERIAL NO

10227234

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Abstract

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A activator for prekallikrein includes isolated, purified, or substantially purified heat shock protein 90, a phosphate ion, and mixtures thereof. The prekallikrein activator is part of an in vitro system for activating prekallikrein in the absence of FXIIa. The system includes the activator, high-molecular weight kininogen, and zinc ions. A method for activating prekallikrein to produce kallikrein in the absence of FXIIa includes mixing prekallikrein with the activator and a composition comprising high molecular weight kininogen and zinc ions. A method for evaluating the activity of a test drug for the production of kallikrein comprises activating prekallikrein and determining the kallikrein produced. The activity (promoting or inhibiting ability) of the tested drug against the production of kallikrein in the absence of FXIIa can be easily measured. The test drug may be an analgesic, anti-allergy, anti-inflammatory drug.

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Patent Owner(s)

Patent OwnerAddress
NIPPON ZOKI PHARMACEUTICAL CO LTD1-2 HIRANOMACHI 2-CHOME CHUO-KU OSAKA-SHI OSAKA 5410046

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Joseph, Kusumam Mt. Pleasant, SC 4 28
Kaplan, Allen P Charleston, SC 6 68

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