Reverse transcriptase assay kit, use thereof and method for...

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

Reexamination Certificate

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C435S005000, C435S091100, C435S091200

Reexamination Certificate

active

06849406

ABSTRACT:
A reverse transcriptase (RT) assay kit for analysis of RT activity in biological samples is described. The kit comprises solid phase bound prA and/or pdA template(s) obtainable by contacting a polystyrene-based solid phase with a 1-methylimidazole-containing coupling solution, and RT-type adapted assay components selected from a buffer, divalent metal ion, chelator, polyamine, RNase inhibitor, reducing agent, salt, stabilizing agent, and detergent, and deoxynucleotide triphosphate, primer, protective agent and concentrated washing buffer, and optionally lyophilized reference enzyme(s), and further optionally lyophilized alkaline phosphatase conjugated anti-BrdU monoclonal antibody, alkaline phosphatase substrate buffer and alkaline phosphatase substrate, and written instructions for use of the assay kit. Further, a method and a use of the assay kit for the qualitative and quantitative analysis of RT activity in a biological sample, optionally followed by evaluation of the status of a RT activity related disorder or disease based on the result of the analysis of the RT activity, are disclosed.

REFERENCES:
patent: 5683875 (1997-11-01), Lichtenwalter
patent: WO 9304199 (1993-03-01), None
Suzuki et al. Poly A-linked colorimetric microtiter plate assay for HIV reverse transcriptase. Journal of Virological Methods (1993) vol. 44, No. 2-3, pp. 189-198.*
Rasmussen et al. Covalent immobilization of DNA onto polystyrene microwells: the molecules are only bound at the 5′ end. Analytical Biochemistry (Oct. 1991) vol. 198, No. 1, pp. 138-142.*
Ekstrand D. Henric L. et al., “A sensitive assay for the quantification of reverse transcriptase activity based on the use of carrier-bound template and non-radioactive-product detection, with special reference to human-immunodeficiency-virus isolation”, Biotechnology and Applied Biochemistry, vol. 23, No. 2, 1996, pp. 95-105, XP000979588.
Shao X. et al., “A non-radioactive microtitre plate reverse transcriptase (RT) assay, based on immobilized template, for screening of RT activity inhibitors and evaluation of the mode of action”, Antiviral Chemistry & Chemotherapy, vol. 8, No. 2, 1997, pp. 149-159, XP000981902.
Awad Raymond J -K. et al., “Measurement of levels of human immunodeficiency virus type 1 reverse transcriptase (RT) and RT activity-blocking antibody in human serum by a new standardized colorimetric assay”, Journal of Clinical Microbiology, vol. 35, No. 5, 1997, pp. 1080-1089, XP002159505.
Database WPI, Week 0014, Derwent Publications Ltd., London, GB; AN 1992-223246, “Reverse transciptase determ.-by using hybridized substance of solidified primer and template RNA”, XP002159753 & JP 04 148698 A (Toyo Jozo KK), May 21, 1992.
Kazuo Suzuki et al., “Poly A-linked colorimetric microtiter plate assay for HIV reverse transcriptase”, p. 189-p. 198, Journal of Virological Methods, vol. 44, 1993.
Tomas Porstmann et al., “A sensitive non-isotopic assay specific for HIV-1 associated reverse transcriptase”, p. 181-p. 188, Journal of Virological Methods, vol. 31, 1991.

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