Abstract:
Hydrazide compounds with GPCR desensitization inhibitory activity are provided that may be used to influence, inhibit or reduce the action of a G-protein receptor kinase. Pharmaceutical compositions including therapeutically effective amounts of the hydrazide compounds and pharmaceutically acceptable carriers are also provided. Various methods using the compounds and/or compositions to affect disease states or conditions controlled or influenced by GPCRs are also provided. Various methods using the compounds and/or compositions to affect disease states or conditions such as cancer, osteoporosis and glaucoma are also provided.
Abstract:
The methods of the present invention allow the screening of a test composition for non-receptor-specific GPCR desensitization inhibitory activity. The methods involve screening a test composition for an indication of GPCR desensitization inhibitory activity against two or more GPCRs that are different from each other. When there is an indication that a particular test composition has GPCR desensitization inhibitory activity with respect to each of the two or more GPCRs that are different from one another, then, according to the present invention, there is an indication that the test composition has non-receptor-specific GPCR desensitization inhibitory activity.
Abstract:
Described herein are methods of identifying a transmembrane receptor (TMR) agonist and compounds identified by this method. The TMR agonist (TMRA) is capable of activating TMR signaling while exhibiting reduced TMR internalization over a control compound.
Abstract:
The present invention relates to agonist-independent methods of screening for compounds that alter GPCR desensitization. Included in the present invention are cell lines containing GRKs, in which GPCRs are desensitized in the absence of agonist; the GRKs may be modified. The present invention relates to methods to determine if a GPCR is expressed at the plasma membrane, and if the GPCR has an affinity for arrestin. Modified GPCRs which have increased arrestin affinity are included in the present invention. These modified GPCRs are useful in methods to screen for compounds that alter desensitization, including both the agonist- independent methods and agonist-dependent methods described herein.
Abstract:
The present invention relates to agonist-independent methods of screening for compounds that alter GPCR desensitization. Included in the present invention are cell lines containing GRKs, in which GPCRs are desensitized in the absence of agonist; the GRKs may be modified. The present invention relates to methods to determine if a GPCR is expressed at the plasma membrane, and if the GPCR has an affinity for arrestin. Modified GPCRs which have increased arrestin affinity are included in the present invention. These modified GPCRs are useful in methods to screen for compounds that alter desensitization, including both the agonist- independent methods and agonist-dependent methods described herein.
Abstract:
Hydrazide compounds with GPCR desensitization inhibitory activity are provided that may be used to influence, inhibit or reduce the action of a G-protein receptor kinase. Pharmaceutical compositions including therapeutically effective amounts of the hydrazide compounds and pharmaceutically acceptable carriers are also provided. Various methods using the compounds and/or compositions to affect disease states or conditions controlled or influenced by GPCRs are also provided. Various methods using the compounds and/or compositions to affect disease states or conditions such as cancer osteoporosis and glaucoma are also provided. (Formula (I)). A is selected from a heteroaryl group (i): wherein X 1 , X 2 , X 3 and X 4 are, independently, CH, O, S or N-R 6 , with the proviso that at least one of X 2 or X 3 is O, S or N-R 6 ; and a heteroaryl group (ii): wherein X 5 and X 9 are CH or C-halogen, X 6 and X 8 are CH, and X 7 is N, and wherein the six-membered heteroaryl group may be further fused with an unsubstituted six-member aryl group; R 1 , R 2 , R 3 , R 4 , and R 5 are, independently, hydrogen; halogen; C 1 -C 4 alkyl; amino; nitro; cyano; heteroaryl; carboxy, carbonylamino; aminosulfonyl; sulfonylamino; aminoacyl; thioalkyl; sulfonyl; acyl; heterocycle; -OR; -O-C 1 -C 4 alkyl-heterocycle; -C(O)NH-C 1 -C 4 alkyl-heterocycle; -C(O)NH-heteroaryl; -C(O)NH-aryl; or carboxylamino; wherein R is C 1 -C 4 alkyl; aryl, heteroaryl, C 1 -C 4 alkyl aryl or C 1 -C 4 alkyl heteroaryl; R 6 is H or C 1 -C 4 alkyl; R 7 is hydrogen, C 1 -C 4 alkyl or C 1 -C 4 alkoxy; and X is N-R 6 .
Abstract:
The present invention is related to the detection of GPCR ligands in a test sample by using a single cell biosensor expressing a GPCR. Preferably, the test sample is derived from a biological or environmental sample. This invention may be used to detect the presence of a disease or to detect the presence of a harmful agent in the environment. Included in the present invention is an array of biosensors that detect ligands of various GPCRs.
Abstract:
Isoquinoline compounds are provided that influence, inhibit or reduce the action of a G-protein receptor kinase . Pharmaceutical compositions including therapeutically effective amounts of the isoquinoline compounds and pharmaceutically acceptable carriers are also provided. Various methods using the compounds and/or compositions to affect disease states or conditions such as cancer, osteoporosis and glaucoma are also provided.
Abstract:
The methods of the present invention allow the screening of a test composition for non-receptor-specific GPCR desensitization inhibitory activity. The methods involve screening a test composition for an indication of GPCR desensitization inhibitory activity against two or more GPCRs that are different from each other. When there is an indication that a particular test composition has GPCR desensitization inhibitory activity with respect to each of the two or more GPCRs that are different from one another, then, according to the present invention, there is an indication that the test composition has non-receptor-specific GPCR desensitization inhibitory activity.
Abstract:
Described herein are methods of identifying a transmembrane receptor (TMR) agonist and compounds identified by this method. The TMR agonist (TMRA) is capable of activating TMR signaling while exhibiting reduced TMR internalization over a control compound.