Method for detecting the von Willebrand factor-cleaving...

Chemistry: molecular biology and microbiology – Measuring or testing process involving enzymes or... – Involving hydrolase

Reexamination Certificate

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C435S069600

Reexamination Certificate

active

10519824

ABSTRACT:
The invention relates to a diagnostic method for determining the von Willebrand factor (VWF) cleaving activity of ADAMTS-13 in a test medium during which the test medium is mixed with 0.5 to 5 U/ml of a von Willebrand factor (VWF) that does not contain ADAMTS-13, and after incubation, the ADAMTS-13 activity is determined based on the drop in the VWF-mediated aggregation of thrombocytes.

REFERENCES:
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Boehm, Martina M. et al.: “Evaluation and clinical application of a new method for measuring activity of von Willebrand factor-cleaving metalloprotease(ADAMTS13)” Annals of Hermatology: vol. 81, No. 8, Aug. 2002, pp. 430-435, XP002263599; ISSN:0939-5555 (the whole document).
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Gerritsen; H.E., Robles, R., Lämmele, B., Furlan, M. (2001) Partial amino acid sequence of purified von Willebrand factor-cleaving protease Blood 98: 1654-1661.
Lvey, G.G., Nichols, W.C., Lian, E.C. Foroud, T., McClintick, J.N., McGee, B.M., Yang, A.Y., Siemieniak, DR., Stark, K.R., Gruppo, R., Sarode, R., Shurin, S.B., Chandrasekaran, V., Stabler, S.P., Sabio, H., Bouhassira, E.E., Upshaw, J.D., Ginsburg, D., Tsai, H.M. (2001) Mutations in a member of the ADAMTS gene family cause thrombotic thrombocytopenic purpura. Nature 413: 488-494.
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Tsai, H.M. (1996) Physiologic Cleavage of von Willebrand factor by a Plasma Protease is dependent on its confirmation and requires Calcium ion. Blood 10: 4235-4244.
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Boehm, Martina M. et al.: “The Significance of The VWF-Cleaving Protease in the Pathogenesis of TTP” (Feb. 2002) Zim der J.W. Goethe University Fim (Frankfurt) abstract No. 29.
Manucci, P.M. et al.: “Changes in health and disease of the metalloprotease that cleaves von Willebrand factor” BLOOD: vol. 98, No. 9, Nov. 1, 2001, pp. 2730-2735.
Database BIOSIS at STN; AN 2002:382326: “Impaired activity of plasma von Willebrand factor-cleaving protease may predict the occurrence of hepatic veno-occlusive disease after stem cell transplantation”, Park, Y.-D. et al., Bone Marrow Transplantation, (May 1, 2002) vol. 29, No. 9, pp. 789-794.
Zheng, X. et al.: “Structure of von Willebrand Factor-cleaving Protease(ADAMTS13),a Metalloprotease Involved in Thrombotic Thrombocytopenic Purpura”; Journal of Biological Chemistry (2001) vol. 276, No. 44, pp. 41059-41063.
Poster shown at the 43rd Annual Metting of the American Society of Hematology on Dec. 8, 2001 in Orlando,Florida.
Abstract of the Poster shown at the 43rd Annual Meeting of the American Society of Hematology on Dec. 8, 2001 in Orlando,Florida.
Von Willebrand Factor 2002 Minutes, p. 4 (speech given at the SSC meeting on Jul. 20, 2002 in Boston, USA).
Abstract of a speech given on Nov. 11, 2001 in Hamburg, Germany.

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