Comparative gene transcript analysis
First Claim
1. A method of analyzing a specimen containing gene transcripts, comprising the steps of:
- obtaining a first mixture of mRNA;
making cDNA copies of the mRNA;
isolating a representative population of the cDNA copies and producing therefrom a first cDNA library, wherein a selected set of random primers is used in the generation of the first cDNA library;
identifying a first set of gene transcripts from the first library and determining cDNA sequences corresponding to the gene transcripts;
processing the cDNA sequences corresponding to the first gene transcripts in a programmed computer in which a database of reference transcript sequences indicative of reference cDNA sequences is stored, to generate a first identified sequence value for each of the first gene transcripts, where each said identified sequence value is indicative of a sequence annotation and a degree of match between one of the first gene transcripts and at least one of the reference cDNA sequences; and
processing each said identified sequence value to generate first final data values indicative of a number of times each first identified sequence value is present in the first cDNA library.
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Abstract
A method and system for quantifying the relative abundance of gene transcripts in a biological sample. One embodiment of the method generates high-throughput sequence-specific analysis of multiple RNAs or their corresponding cDNAs (gene transcript imaging analysis). Another embodiment of the method produces a gene transcript imaging analysis by the use of high-throughput cDNA sequence analysis. In addition, the gene transcript imaging can be used to detect or diagnose a particular biological state, disease, or condition which is correlated to the relative abundance of gene transcripts in a given cell or population of cells. The invention provides a method for comparing the gene transcript image analysis from two or more different biological samples in order to distinguish between the two samples and identify one or more genes which are differentially expressed between the two samples.
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Citations
11 Claims
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1. A method of analyzing a specimen containing gene transcripts, comprising the steps of:
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obtaining a first mixture of mRNA; making cDNA copies of the mRNA; isolating a representative population of the cDNA copies and producing therefrom a first cDNA library, wherein a selected set of random primers is used in the generation of the first cDNA library; identifying a first set of gene transcripts from the first library and determining cDNA sequences corresponding to the gene transcripts; processing the cDNA sequences corresponding to the first gene transcripts in a programmed computer in which a database of reference transcript sequences indicative of reference cDNA sequences is stored, to generate a first identified sequence value for each of the first gene transcripts, where each said identified sequence value is indicative of a sequence annotation and a degree of match between one of the first gene transcripts and at least one of the reference cDNA sequences; and processing each said identified sequence value to generate first final data values indicative of a number of times each first identified sequence value is present in the first cDNA library. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of producing a gene transcript image, comprising the steps of
obtaining a mixture of mRNA from a biological specimen; -
making cDNA copies of the mRNA, wherein the cDNA copies of mRNA are made using a selected set of random primers; inserting the cDNA copies into a suitable vector and transfecting suitable host strain cells with the vector and growing clones, each clone representing a unique mRNA; isolating a representative population of at least 5,000 recombinant clones; identifying amplified cDNAs from each clone in the population by a sequence-specific method which identifies a gene from which the unique mRNA was transcribed; determining a number of times each gene is represented within the population of clones as an indication of relative abundance; and listing genes and their relative abundance in order of abundance, thereby producing a gene transcript image comparing the gene transcript image with a gene transcript image derived from a diseased biological specimen and/or a normal biological specimen.
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Specification