Abstract: The cell-based assays described in the present invention can be used to directly assess the sensitivity and specificity of the gene annotation reagent against its target, mapping genes and to determine if a non-targeted gene participates in a pathway of interest or is functionally linked to another gene or protein. Preferred assay embodiments include fluorescence or luminescence assays in intact (live or fixed) cells. Such fluorescence or luminescence assays include high-throughput or high-content assays for protein activity, subcellular localization, post-translational modifications, or interactions of proteins. Suitable assays may include protein-protein interaction assays; protein translocation assays; and post-translational modification assays. The invention can be used to assess the efficacy of any gene silencing experiment, and to map novel genes into biochemical pathways, and to identify novel pharmaceutical targets.

Abstract: The present invention provides protein fragment complementation assays for drug discovery, in particular to identify compounds that activate or inhibit cellular pathways. Based on the selection of an interacting protein pair combined with an appropriate PCA reporter, the assays may be run in high-throughput or high-content mode and may be used in automated screening of libraries of compounds. The interacting pair may be selected by cDNA library screening; by gene-by-gene interaction mapping; or by prior knowledge of a pathway. Fluorescent and luminescent assays can be constructed using the methods provided herein. The selection of suitable PCA reporters for high-throughput or high-content (high-context) assay formats is described for a diversity of reporters, with particular detail provided for examples of monomeric enzymes and fluorescent proteins.

Abstract: The present invention provides protein fragment complementation assays for drug discovery, in particular to identify compounds that activate or inhibit cellular pathways. Based on the selection of an interacting protein pair combined with an appropriate PCA reporter, the assays may be run in high-throughput or high-content mode and may be used in automated screening of libraries of compounds. The interacting pair may be selected by cDNA library screening; by gene-by-gene interaction mapping; or by prior knowledge of a pathway. Fluorescent and luminescent assays can be constructed using the methods provided herein. The selection of suitable PCA reporters for high-throughput or high-content (high-context) assay formats is described for a diversity of reporters, with particular detail provided for examples of monomeric enzymes and fluorescent proteins.

Abstract: A method of assaying protein-protein interactions associated with proteins involved in lipid pathways using a protein fragment complementation assays, said method comprising the steps of: (a) identifying protein molecules that interact with said protein associated with lipid pathways; (b) selecting a protein reporter molecule; (c) effecting fragmentation of said protein reporter molecule such that said fragmentation results in reversible loss of reporter function; (d) fusing or attaching fragments of said protein reporter molecule separately to said interacting protein molecules as defined in step (a); (e) transfecting cells with nucleic acid constructs coding for the products of step (d); (f) reassociating said reporter fragments through interactions of the protein molecules that are fused or attached to said fragments; and (g) measuring directly or Indirectly the activity of said reporter molecule resulting from the reassociation of said reporter fragments.

Abstract: The invention provides a method of screening a candidate drug, a compound library or a biological extract to identify activators or inhibitors of G-protein-coupled receptors or G-protein-coupled pathways, comprising: (A) using a fluorescent protein fragment complementation assay to construct an assay for one or more steps in a G-protein-coupled pathway; (B) testing the effects of the candidate drugs, compound library, or biological extract on the receptor or pathway of interest; and (C) using the results of the screening to identify specific agents that activate or inhibit the receptor or pathway of interest. The invention also provides a method for identifying a drug lead that modulates the activity of a G-protein-coupled pathway using a fluorescent protein fragment complementation assay. The method of the invention is used to identify agonists, antagonists, activators or inhibitors of G-protein coupled receptors or G-protein-coupled pathways.

Abstract: The instant invention describes a method for detecting protein-protein interactions in living organisms and/or cells, said method comprising: (a) synthesizing probe protein fragments from a protein which enables fluorescent or luminescent detection by dissecting the gene coding for the fluorescent or luminescent protein into a least two fragments; (2) constructing fusion proteins consisting of the probe protein fragments linked to protein domains that are to be tested for interactions; (3) coexpressing the fusion proteins; and (d) detecting reconstitution of the fluorescence or luminescence signal.

Abstract: The present invention relates to methods and compositions designed for the treatment, management or prevention of cancer. The methods of the invention comprise the administration of an effective amount of one or more inhibitors of JNK in combination with the administration of an effective amount of one or more other agents useful for cancer therapy. The invention also provides pharmaceutical compositions comprising one or more inhibitors of JNK in combination with one or more other agents useful for cancer therapy. In particular, the invention is directed to methods of treatment and prevention of cancer by the administration of an effective amount of one or more inhibitors of JNK in combination with standard and experimental chemotherapies, hormonal therapies, bone marrow transplants, stem cell replacement therapies, biological therapies/immunotherapies and/or radiation therapies for treatment or prevention of cancer.

Abstract: The instant invention describes a method for detecting protein-protein interactions in living organisms and/or cells, said method comprising: (a) synthesizing probe protein fragments from a protein which enables fluorescent or luminescent detection by dissecting the gene coding for the fluorescent or luminescent protein into a least two fragments; (2) constructing fusion proteins consisting of the probe protein fragments linked to protein domains that are to be tested for interactions; (3) coexpressing the fusion proteins; and (d) detecting reconstitution of the fluorescence or luminescence signal.

Abstract: The present invention provides protein single-color and multi-color protein fragment complementation assays for drug discovery, in particular to identify compounds that activate or inhibit cellular pathways. Based on the selection of an interacting protein pair combined with an appropriate PCA reporter such as monomeric enzymes and fluorescent proteins, the assays may be run in high-throughput or high-content mode and may be used in automated screening of libraries of compounds. Methods are described for constructing such assays for one or more steps in a biochemical pathway; testing the effects of compounds from combinatorial, natural product, peptide, antibody, nucleic acid or other diverse libraries on the protein or pathway(s) of interest; and using the results of the screening to identify specific compounds that activate or inhibit the protein or pathway(s) of interest. The development of such assays provides for a broad, flexible and biologically relevant platform for drug discovery.

Abstract: The cell-based assays described in the present invention can be used to directly assess the sensitivity and specificity of the gene annotation reagent against its target, and to determine if a non-targeted gene participates in a pathway of interest or is functionally linked to another gene or protein. The combination of annotation reagents with such cell-based assays is useful for mapping genes (proteins) into cellular pathways on a genome-wide scale. Preferred assay embodiments include fluorescence or luminescence assays in intact (live or fixed) cells. Such fluorescence or luminescence assays include high-throughput or high-content assays for protein activity, subcellular localization, post-translational modifications, or interactions of proteins. Suitable assays may include protein-protein interaction assays; protein translocation assays; and post-translational modification assays.

Abstract: The present invention provides protein fragment complementation assays for drug discovery, in particular to identify compounds that activate or inhibit cellular pathways. Based on the selection of an interacting protein pair combined with an appropriate PCA reporter, the assays may be run in high-throughput or high-content mode and may be used in automated screening of libraries of compounds. The interacting pair may be selected by cDNA library screening; by gene-by-gene interaction mapping; or by prior knowledge of a pathway. Fluorescent and luminescent assays can be constructed using the methods provided herein. The selection of suitable PCA reporters for high-throughput or high-content (high-context) assay formats is described for a diversity of reporters, with particular detail provided for examples of monomeric enzymes and fluorescent proteins.

Abstract: The present invention relates to methods and compositions designed for the treatment, management or prevention of cancer. The methods of the invention comprise the administration of an effective amount of one or more inhibitors of JNK in combination with the administration of an effective amount of one or more other agents useful for cancer therapy. The invention also provides pharmaceutical compositions comprising one or more inhibitors of JNK in combination with one or more other agents useful for cancer therapy. In particular, the invention is directed to methods of treatment and prevention of cancer by the administration of an effective amount of one or more inhibitors of JNK in combination with standard and experimental chemotherapies, hormonal therapies, bone marrow transplants, stem cell replacement therapies, biological therapies/immunotherapies and/or radiation therapies for treatment or prevention of cancer.