Immunophilins

Immunophilins are a family of proteins that have a high affinity for immunosuppressive drugs. They are found in all organisms, from bacteria to humans, and are involved in a variety of biological processes, including protein folding, cell signaling, and apoptosis.

Function

Immunophilins function as molecular chaperones, assisting in the folding of other proteins. They also play a role in cell signaling, particularly in the immune system, where they are involved in the activation of T cells and other immune cells. In addition, immunophilins have been implicated in the regulation of apoptosis, or programmed cell death.

Types

There are two main types of immunophilins: FK506-binding proteins (FKBPs) and cyclophilins. Both types have a similar structure and function, but they bind to different immunosuppressive drugs.

FK506-binding proteins

FKBPs bind to the immunosuppressive drug FK506 (also known as tacrolimus). They are involved in the regulation of the calcineurin pathway, which is important for T cell activation.

Cyclophilins

Cyclophilins bind to the immunosuppressive drug cyclosporin A. They are involved in the regulation of the calcineurin pathway, similar to FKBPs.

Clinical significance

Immunophilins are the target of several immunosuppressive drugs, including FK506 and cyclosporin A. These drugs are used to prevent organ rejection in transplant patients and to treat autoimmune diseases.

In addition, research is ongoing to develop new drugs that target immunophilins for the treatment of other diseases, including cancer, neurodegenerative diseases, and infectious diseases.

See also

• Immunosuppressive drug
• Molecular chaperone
• Protein folding
• Cell signaling
• Apoptosis
• FK506-binding protein
• Cyclophilin
• Calcineurin
• Organ rejection
• Transplant
• Autoimmune disease
• Cancer
• Neurodegenerative disease
• Infectious disease

Immunophilins Resources
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