[특허]Evaluation of nucleic acids in a biological sample hybridization in a solution of chaotrophic salt solubilized cells

Evaluation of nucleic acids in a biological sample hybridization in a solution of chaotrophic salt solubilized cells 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C12Q-001/68 C12N-011/00 C12N-015/00 C07H-021/00
출원번호	US-0006190 (1993-01-19)
발명자 / 주소	Gillespie David H. (Glenmore PA)
출원인 / 주소	Hahnemann University (Philadelphia PA 02)
인용정보	피인용 횟수 : 93 인용 특허 : 0

초록 ▼

Nucleic acid components in a biological sample are detected and/or quantified utilizing a process wherein the sample is first solubilized with a chaotropic salt solution. In a preferred embodiment, cells and nucleic acid components therein are solubilized in the chaotropic salt solution and the solution is incubated with a labelled nucleic acid probe at 20°to 40°C. in the absence of formamide to cause molecular hybridization between the probe and solubilized nucleic acid components, and the molecular hybridization is detected. The chaotropic salt is selected from quanidine thiocyanate, alkali metal perchlorates, alkali metal iodides, alkali metal trifluoroacetates, alkali metal trichloroacetates and alkali metal thiocyanates. The probe may be in solution or immobilized. RNA detected or quantitated may be ribosomal RNA or genomic RNA, and in one embodiment the RNA is HIV viral RNA. When detecting DNA, the solution containing solubilized cells and DNA is heated to at least 45°C. to denature the DNA before hybridization.

대표청구항 ▼

A method for detecting the presence of or quantitating an amount of RNA containing a specific nucleotide sequence of differing nucleotides in a biological sample comprising cells containing said RNA, comprising the steps of: (a) solubilizing the cells of the sample and said RNA contained therein by contacting said biological sample with a chaotropic salt selected from the group consisting of guanidine thiocyanate, alkali metal perchlorates, alkali metal iodides, alkali metal trifluoroacetates, alkali metal trichloroacetates, and alkali metal thiocyanates, whereby a solution of solubilized cells and RNA is produced; (b) incubating the solution of the solubilized cells and RNA produced in (a) at a temperature in the range of 20°C. to 40°C. with at least one nucleic acid probe in solution, said at least one nucleic acid probe being complementary and sequence specific to said specific nucleotide sequence of differing nucleotides of the solubilized RNA under conditions which cause molecular hybridization between said at least one nucleic acid probe in solution and said solubilized RNA, said molecular hybridization occurring in the absence of formamide; and (c) detecting said molecular hybridization occurring in (b). A method for detecting the presence of or quantitating the amount of DNA in a biological sample comprising cells, comprising the steps of (a) solubilizing the cells of the sample and the DNA contained therein by contacting said biological sample with a chaotropic salt selected from the group consisting of guanidine thiocyanate, alkali metal perchlorates, alkali metal iodides, alkali metal trifluoroacetates, alkali metal trichloroacetates, and alkali metal thiocyanates, whereby a solution of solubilized cells and DNA is produced; (b) heating the solution of the solubilized cells and DNA produced in (a) to a temperature of at least 45°C. and maintaining the temperature for a period of time sufficient to denature the DNA thereby producing a solution of solubilized cells and single-stranded DNA; (c) incubating the solution of the solubilized cells and single-stranded DNA produced in (b) at a temperature in the range of 20°C. to 40°C. with at least one nucleic acid probe in solution, said at least one nucleic acid probe being complementary to at least a portion of said solubilized single-stranded DNA under conditions which cause molecular hybridization between said at least one nucleic acid probe in solution and said solubilized single-stranded DNA, said molecular hybridization occurring in the absence of formamide; and (d) detecting said molecular hybridization occurring in (c).

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Evaluation of nucleic acids in a biological sample hybridization in a solution of chaotrophic salt solubilized cells 원문보기

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Evaluation of nucleic acids in a biological sample hybridization in a solution of chaotrophic salt solubilized cells 원문보기

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