Compositions and methods for inducing or inhibiting...

Organic compounds -- part of the class 532-570 series – Organic compounds – Carbohydrates or derivatives

Reexamination Certificate

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C536S023100, C435S325000

Reexamination Certificate

active

07906637

ABSTRACT:
Polynucleotides encoding a mutant human carboxylesterase enzyme and polypeptides encoded by the polynucleotides which are capable of metabolizing a prodrug and inactive metabolites thereof to active drug are provided. Compositions and methods for sensitizing cells to a prodrug agent, inhibiting cell growth, treating drug addiction, and facilitating the metabolism of an organophosphate with this enzyme are also provided. In addition, a screening assay for identification of drugs activated by this enzyme is described.

REFERENCES:
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Broomfield and Kirby, Journal of Applied Toxicology, 2001, 21:S53-S46.
NCBI Accession No. AF036930 [gi:3219694] with Revision History, Jun. 15, 1998-Jun. 20, 1998.
NCBI Accession No. M73499 [gi:179927] with Revision History, Oct. 31, 1991-Apr. 27, 1993.
Bencharit et al., “Crystal structure of human carboxylesterase 1 complexed with the Alzheimer's drug Tacrine:from binding promiscuity to selective inhibition”, Chemistry & Biology 2003 10:341-349.
Bencharit et al., “Structural insights into CPT-11 activation by mammalian carboxylesterases”, Nature Structural Biology 2002 9(5):337-342.
Danks et al., “Comparison of activation of CPT-11 by rabbit and human carboxylesterases for use in enzyme/prodrug therapy”, Clinical Cancer Research 1999 5:917-924.
Meck et al., “A virus-directed enzyme prodrug therapy approach to purging neuroblastoma cells from hematopoietic cells using adenovirus encoding rabbit carbosylesterase and CPT-11”, Cancer Research 2001 61:5083-5089.
Potter et al., “Isolation and partial characterization of a cDNA encoding a rabbit liver carboxylesterase that activates the prodrug irinotecan (CPT-11)”, Cancer Research 1998 58:2646-2651.
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Khanna et al., “Proficient metabolism of irinotecan by a human intestinal carboxylesterase”, Cancer Research 2000 60:4725-4728.
Redinbo et al., “Human carboxylesterase 1:from drug metabolism to drug discovery”, Biochemical Society Transactions 2003 31(3):620-624.
Rooseboom et al., “Enzyme-catalyzed activation of anticancer prodrugs”, Pharmacological Reviews 2004 56(1):53-102.
Wadkins et al., “Structural constraints affect the metabolism of 7-ethyl-10-[4-(1-piperidino)-1-piperidino]carbonyloxycamptothecin (CPT-11) by carboxylesterases”, Molecular Pharmacology 2001 60:355-362.
Wagner et al., “Efficacy and toxicity of a virus-directed enzyme prodrug therapy purging method:preclinical assessment and application to bone marrow samples from neuroblastoma patients”, Cancer Research 2002 62:5001-5007.
Wierdl et al., “Sensitization of human tumor cells to CPT-11 via adenoviral-mediated delivery of a rabbit liver carboxylesterase”, Cancer Research 2001 61:5078-5082.

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