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[Progress in the treatment targeting intracellular signaling in the context of osteoimmunology]
1School of Medicine, University of Occupational and Environmental Health, Japan.
Abstract:
The appropriate intracellular signaling pathways are activated via binding of receptors on the cell surface to ligands such as cytokines and cell surface antigens. The tyrosine kinase transduce the first "outside to in" signals to be phosphorylated following receptor binding to its ligand. Among them, members of Janus kinase (Jak) family and Spleen tyrosine kinase (Syk) family are essential for the signaling pathways of various cytokines and are implicated in the pathogenesis of autoimmune inflammatory disease. The development of low molecular weight kinase inhibitors targeting Jak and Syk appears to be successful for the treatment of rheumatoid arthritis, a representative inflammatory disease. These inhibitors also succeed to regulate joint destruction. On the other hand, calcineurin inhibitors such as tacrolimus and vitamin D are also effective for immune regulation as well as bone metabolism through the inhibition of nuclear factors. Taken together, regulation of cellular signals functioning on immunity as well as bone metabolism may have a potential to approach to the treatment of osteo-immune diseases.
Insights
Targeting Janus kinase (Jak) and Spleen tyrosine kinase (Syk) with inhibitors shows promise for treating autoimmune inflammatory diseases like rheumatoid arthritis and regulating bone destruction. Calcineurin inhibitors also aid immune and bone health.
Area of Science:
- Molecular Biology
- Immunology
- Rheumatology
Context:
- Cellular signaling pathways are initiated by cell surface receptor-ligand interactions, involving cytokines and antigens.
- Tyrosine kinases, including Janus kinase (Jak) and Spleen tyrosine kinase (Syk) families, are crucial for transducing these extracellular signals intracellularly.
- These kinases play significant roles in the pathogenesis of autoimmune inflammatory diseases.
Purpose:
- To explore the therapeutic potential of targeting intracellular signaling pathways in osteo-immune diseases.
- To investigate the efficacy of kinase inhibitors and calcineurin inhibitors in immune regulation and bone metabolism.
Summary:
- Low molecular weight inhibitors targeting Jak and Syk have demonstrated success in treating rheumatoid arthritis and preventing joint destruction.
- Calcineurin inhibitors, such as tacrolimus and vitamin D, effectively regulate immune responses and bone metabolism by inhibiting nuclear factors.
- The combined regulation of cellular signals governing immunity and bone metabolism presents a promising therapeutic strategy for osteo-immune diseases.
Impact:
- Provides a rationale for developing novel treatments for autoimmune and bone-related disorders.
- Highlights the interconnectedness of immune and bone pathways in disease pathogenesis.
- Suggests a unified approach to treating complex osteo-immune conditions by modulating key signaling molecules.
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