CAS: 2650-17-1; Xylene Cyanol Ff

专利信息

专利号:US-8153361-B1
优先权日:2006-02-06
标题:Dynamic and combinatorial synthesis of polymerase primers
发明人：BENNER STEVEN ALBERT
权利人:BENNER STEVEN ALBERT
摘要:This invention relates to the field of nucleic acid chemistry, more specifically to compositions of matter that are nucleic acid analogs, and processes that use them. Still more specifically, these compositions comprise two fragments of DNA-like molecules, each having one or more ends modified to carry a reactive group, where the reactive group on one fragment can form a transient covalent bond with the reactive group on the other under conditions of dynamic equilibrium to form a composite, where the composite can then bind to a target oligonucleotide, such as a DNA or RNA molecule. Most specifically, once the transient covalent bond forms, the composite serves as a primer for a template-directed polymerization using a DNA polymerase, an RNA polymerase, or a reverse transcriptase. Once incorporated, the epimerization causes the base pair to be destabilized, the duplex containing the epimerized nucleoside to likewise be destabilized, and the double strand to then disassociate. This leaves the template available to template the synthesis of another complementary oligonucleotide containing the epimerizing base.

专利号:EP-0799313-A2
优先权日:1994-12-13
标 题 :Method and reagent for treatment of arthritic conditions, induction of graft tolerance and reversal of immune responses
发明人：BEIGELMAN LEONID; STINCHCOMB DANIEL T; JARVIS THALE; DRAPER KENNETH; PAVCO PAMELA; MCSWIGGEN JAMES; GUSTOFSON JOHN; USMAN NASSIM; WINCOTT FRANCINE; MATULIC-ADAMIC JASENKA; KARPEISKY ALEXANDER; THOMPSON JAMES D; MODAK ANIL; BURGIN ALEX
权利人:RIBOZYME PHARM INC
摘要:An enzymatic nucleic acid molecule which cleaves RNA associated with development or maintenance of an arthritic condition, induction of graft tolerance or reversal of an immune response. In particular, the ribozyme sequences are directed to an mRNA encoding B7-1, B7-2, B7-3, CD40 and/or stromelysin. Also provided are ribozymes where the uracil in positions 4 and/or 7 are substituted, as well as methods for the synthesis of 2'-alkylnucleotides, 2'-O-alkylthioalkyl, or 2'-alkylthioalkylnucleotides. The application further describes a method for diprotection of RNA with aqueous ethylamine, a method for synthesis of a basic ribonucleoside mimetics, and transcription units comprising an RNA polymerase II promoter, a U6 small nuclear promoter, or an adenovirus VA1 promoter system.

专利号:US-2005080260-A1
优先权日:2003-04-22
标 题 :Preparation of prodrugs for selective drug delivery
发明人：MILLS RANDELL L; WU GUO-ZHANG
摘要:Synthesis of a chemical compound having the formula A-B-C that may serve for applications such as drug delivery where A is a chemiluminescent, moiety, B is a photochromic moiety, and C is a biologically active moiety where A-B-C may serve as a prodrug. Novel synthetic methods of the present invention to form the prodrug comprised the steps of (1) forming a benzophenone, (2) forming a diaryl ethylene, (3) attaching a phthalimide moiety to at least one of the aryl groups of the ethylene to form a phthalimide-ethylene conjugate, (4) condensing two ethylene-phthalimide conjugates to form a phthalimide-pentadiene conjugate, (5) converting the phthalimide to the phthalhydrazide by reaction with hydrazine to form a carrier compound according to the present invention, and (6) reacting the carrier compound with an nucleophilic moiety of the drug to form the corresponding prodrug. Alternatively the carrier can be prepared by using the halo-substituted diaryl ethylene to make the corresponding cationic leuco dye-like compound with known methods. The cationic compound then is protected by reacting with a nucleophile and coupled with the aminophathalimide by palladium-catalyzed amination to form the protected phthalimide-pentadiene conjugate. The latter is refluxed with hydrazine to convert its phthalimide to the phthalhydrazide and acidified to give the carrier. An additional aspect of the present invention relates to the use of these compounds as antiviral agents for the treatment of viral infections such as HIV and as anticancer agents for the treatment of cancers such as bowel, lung, and breast cancer.

专利号:US-5013830-A
优先权日:1986-09-08
标题 :Compounds for the cleavage at a specific position of RNA, oligomers employed for the formation of said compounds, and starting materials for the synthesis of said oligomers
发明人：OHTSUKA EIKO; INOUE HIDEO; MORISAWA HIROKAZU; SHIBAHARA SUSUMU; MUKAI SACHIKO; NISHIHARA TOHRU
权利人:AJINOMOTO KK
摘要:There is disclosed a compound having a double chain which is composed of an RNA (+chain) and a complementary DNA (-chain), wherein a portion of the DNA (-chain) has been replaced by an RNA or a derivative thereof, and wherein, when the compound is subjected to the action of an enzyme having a ribonuclease H activity, it is possible to preferentially cleave the RNA (+chain) in a position corresponding to the unsubstituted portion of the DNA (-chain). The compound can thus be used for the preferential cleavage of a phosphodiester bond in a specific position of RNA. Accordingly, the invention provides a useful means for preparing, for instance, a deletion mutant. There is also disclosed a mixed oligomer which comprises an oligomer of RNA or a derivative thereof and a DNA oligomer, wherein the RNA oligomer or a derivative thereof is conjugated to the DNA oligomer via a phosphate diester linkage between the 5'-hydroxyl group and the 3'-hydroxyl group in the ribose or deoxyribose moiety. There is further disclosed a nucleoside derivative of a given general formula for use as a starting material.

专利号:US-7344835-B2
优先权日:1996-11-22
标题:Methods for preventing inhibition of nucleic acid synthesis by pyrophosphate
发明人：BLAKESLEY ROBERT W
权利人:INVITROGEN CORP
摘要:Methods for preventing inhibition of nucleic acid synthesis by pyrophosphate are disclosed. More specifically, the present invention concerns inhibiting or preventing pyrophosphorolysis in sequencing and amplification of nucleic acid molecules. According to the present invention, an enzyme which is a pentosyltransferase, a phosphotransferase with an alcohol group as acceptor, a nucleotidyltransferase, or a carboxy-lyase is added to the reaction which serves to remove pyrophosphate from the reaction mixture.

专利号:US-5656462-A
优先权日:1992-01-29
标题:Method for synthesizing cDNA using a polynucleotide immobilized support
发明人：KELLER CYLIA; MITSUHASHI MASATO; AKITAYA TATSUO
权利人:HITACHI CHEMICAL CO LTD; HITACHI CHEMICAL RES CT INC
摘要:The present invention provides a nucleotide-immobilized support which includes an insoluble support and a polynucleotide bound to the support. This polynucleotide includes at least one sequence complementary to a polyadenylic acid tail of a mRNA. The nucleotide-immobilized support is useful for a variety of methods, including the synthesis of both sense and antisense cDNA, as well as double stranded cDNA. The nucleotide-immobilized support is also useful for synthesis of both sense and antisense mRNA. Additionally, the nucleotide-immobilized support also provides an improved method of placing a cDNA sequence into a vector in a particular orientation. The present invention also includes a new method for binding polynucleotides to insoluble supports.