摘要:
Methods and compositions are provided that are useful for detecting and reporting a plurality of different target polynucleotide sequences in a sample, such as polynucleotides corresponding to a plurality of different genes expressed by a cell or cells. In particular, the invention provides methods for screening a plurality of candidate polynucleotide probes to evaluate both the sensitivity and the specificity with which each candidate probe hybridizes to a target polynucleoide sequence. Candidate polynucleotide probes can then be ranked according to both their sensitivity and specificity, and probes that have optimal sensitivity and specificity for a target polynucleotide sequence can be selected. In one embodiment, polynucleotide probes can be selected according to the methods described herein to prepare “screening chips” wherein a large number of target polynucleotide sequences are detected using a single microarray have a few (e.g., 1–5) probes for each target polynucleotide sequence. In a particularly preferred embodiment, the invention provides a screening chip that can detect genetic transcripts from the entire genome of an organism. In an alternative embodiment, polynucleotide probes can be selected according to the methods described herein to prepare “signature chips” to more accurately detect certain selected “signature genes” using several polynucleotide probes (e.g., 10–20) for each signature gene. The invention additionally provides microarrays containing polynucleotide probes for a large number of genes expressed by a cell or organism. Further, methods for detecting a plurality of polynucleotide molecules, including a large number of genes expressed by a cell or organism, are also provided.
摘要:
The present invention provides methods and systems, particularly computer systems, for determining the relative specificity with which a particular polynucleotide molecule hybridizes to a polynucleotide probe. For example, the methods and systems of the invention enable a user to compare the specificity with which different polynucleotides hybridize to a given probe and/or rank these polynucleotides according to their specificity to that probe. The methods and systems of the invention also enable a user to compare the specificity with which a particular polynucleotide hybridizes to different probes, and/or rank those different probes according to their specificity for that particular polynucleotide.
摘要:
The present invention provides methods for distinguishing the fractions of polynucleotide sequences which hybridize to any given probe, including probes on microarrays such as those described herein. In particular, the present invention enables users to identify the fraction of sequences which are perfectly complementary to a probe, thereby correcting for effects of cross hybridization in a hybridization assay. The methods of the invention work by monitoring the kinetics of dissociation of sequences from the probe so that a resulting “dissociation curve” may be compared to a combination of the individual “dissociation profiles” for each sequence which hybridizes. In alternative embodiments, the invention also provides computer systems for performing the present methods, as well as databases of the dissociation profiles.
摘要:
The present invention provides methods and computer systems for identifying and representing the biological pathways of drug action on a cell The present invention also provides methods and computer systems for assessing the significance of the identified representation and for verifying that the identified pathways are actual pathway of drug action. The present invention also provides methods and computer systems for drug development based on the methods for identifying biological pathways of drug action, and methods and computer systems for representing the biological pathways involved in the effect of an environmental change upon a cell.
摘要:
The present invention provides methods for enhanced detection of biological response profiles. In particular, the methods of this invention allow for the detection of biological response patterns, such as gene expression patterns, in response to different drug treatments. The methods of the invention also allow the determination of a “consensus profile” which describes a particular class or type of biological response. In certain embodiments the consensus profile may describe the biological response of a particular group or class of drugs. In other embodiments, the consensus profile may describe an “ideal” biological response such as one associated with a desired therapeutic effect. The methods of the present invention also allow for the comparison of different biological responses. Thus, the methods of the invention may be used, e.g., to identify and/or study new drugs.
摘要:
The present invention provides prognostic methods for conditions such as cancer, for example, breast cancer, comprising classifying an individual by a plurality of phenotypic, genotypic or clinical characteristics of the condition into a plurality of patient subsets, and analyzing the pattern of expression of prognosis-informative genes identified for that subset in a sample from the individual. The present invention also provides methods for constructing such patient subsets and of identifying prognosis-informative genesets for such subsets. The invention further provides methods of assigning a therapeutic regimen to an individual, microarrays useful for performing prognosis, kits comprising these microarrays, and computer systems and programs for implementing the methods of the invention.
摘要:
The present invention provides prognostic methods for conditions such as cancer, for example, breast cancer, comprising classifying an individual by a plurality of phenotypic, genotypic or clinical characteristics of the condition into a plurality of patient subsets, and analyzing the pattern of expression of prognosis-informative genes identified for that subset in a sample from the individual. The present invention also provides methods for constructing such patient subsets and of identifying prognosis-informative genesets for such subsets. The invention further provides methods of assigning a therapeutic regimen to an individual, microarrays useful for performing prognosis, kits comprising these microarrays, and computer systems and programs for implementing the methods of the invention.
摘要:
The present invention provides methods for monitoring disease states in a subject, as well as methods for monitoring the levels of effect of therapies upon a subject having one or more disease states. The methods involve: (i) measuring abundances of cellular constituents in a cell from a subject to obtain a diagnostic profile, (ii) measuring abundances of cellular constituents in a cell of one or more analogous subjects to obtain perturbation response profiles which correlate to a particular disease or therapy, and (iii) determining the interpolated perturbation response profile or profiles which best fit the diagnostic profile. In other aspects, the invention also provides a computer system capable of performing the methods of the invention, databases comprising perturbation response profiles for one or more diseases and/or therapies, and kits for determining levels of disease states and/or therapeutic effects according to the methods of the invention.
摘要:
The present invention provides methods for enhanced detection of biological response patterns. In one embodiment of the invention, genes are grouped into basis genesets according to the co-regulation of their expression. Expression of individual genes within a geneset is indicated with a single gene expression value for the geneset by a projection process. The expression values of genesets, rather than the expression of individual genes, are then used as the basis for comparison and detection of biological response with greatly enhanced sensitivity. In another embodiment of the invention, biological responses are grouped according to the similarity of their biological profile. The methods of the invention have many useful applications, particularly in the fields of drug development and discovery. For example, the methods of the invention may be used to compare biological responses with greatly enhanced sensitivity. The biological responses that may be compared according to these methods include responses to single perturbations, such as a biological response to a mutation or temperature change, as well as graded perturbations such as titration with a particular drug. The methods are also useful to identify cellular constituents, particularly genes, associated with a particular type of biological response. Further, the methods may also be used to identify perturbations, such as novel drugs or mutations, which effect one or more particular genesets. The methods may still further be used to remove experimental artifacts in biological response data.
摘要:
The present invention provides methods for determining the level of protein activity in a cell by: (i) measuring abundances of cellular constituents in a cell in which the activity of a specific protein is to be determined so that a diagnostic profile is thus obtained; (ii) measuring abundances of cellular constituents that occur in a cell in response to perturbations in the activity of said protein to obtain response profiles and interpolating said response profiles to generate response curves; and (iii) determining a protein activity level at which the response profile extracted from the response curves best fits the measured diagnostic profile, according to some objective measure. In alternative embodiments, the present invention also provides methods for identifying individuals having genetic mutations or polymorphisms that disrupt protein activity, and methods for identifying drug activity in vivo by determining the activity levels of proteins which interact with said drugs.