S signal transduction

Pharmocodynamic tolerance develops in response to continued application of drugs, by mechanisms that include reversible cellular adaptation processes, such as receptor desensitization, internalization and downregu-lation as well as changes in the activity and levels of other components of the receptor s signal transduction pathways. 

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Loss of the cell s responsiveness to the hormone insulin caused by pathological alterations in the insulin receptor signal transduction pathway, and often leading... 

Furthermore, peptidomimetic SH2 domain inhibitors for Src, such as AP-22408 have been designed that interfere with effector binding and thereby disrupt signal transduction. AP-22408 decreases bone resorption in animal studies and may be a promising drug to treat osteoporosis and other bone diseases, such as Paget s disease and osteolytic bone metastasis. 

Membrane Signal Transduction Membrane Transport Protein Menaquinones-n Meniere s Disease Mesangial Cells... 

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Fig. 12. Tentative model of the signal transduction chain that links the perception of pectic fragments to defense responses in carrot cells. Abbreviations apy, heterotrimeric G protein CaM, calmodulin 4CL, 4-coumarate-CoA ligase CTX, cholera toxin FC, fusicoccine GDP-P-S and GTP-y-S, guanosine 5 -0-(2-thiodiphosphate) and guanosine 5 -0-(3-thiotriphosphate) IP3, 1,4,5-inositol trisphosphate PAL, phenylalanine ammonia-lyase PLC, phospholipase C PR, pathogenesis related PTX, pertussis toxin Rc, receptor SP, staurosporine. Activation and inhibition are symbolized by + and -respectively.

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