Antibiotiques

Cyclosporin V is an immunosuppressant medication with action on calcineurin inhibition and is used for preventing organ rejection in transplants and treating autoimmune diseases.

Leptomycin B is a bacterial secondary metabolite, which is derived from the bacterium Streptomyces sp. This compound is a potent nuclear export inhibitor with a mechanism of action that targets and inhibits the export receptor CRM1 (Chromosomal Maintenance 1), also known as Exportin 1. By binding irreversibly to CRM1, Leptomycin B prevents the nuclear export of proteins and RNA, disrupting the nuclear-cytoplasmic transport essential for cell function.

Spiramycin I is a macrolide antibiotic with action on bacterial protein synthesis inhibition and is used for treating toxoplasmosis and bacterial infections.

Oleandomycin is a macrolide antibiotic, which is derived from the bacterium *Streptomyces antibioticus*. This antibiotic functions by binding to the 50S subunit of the bacterial ribosome, thereby inhibiting protein synthesis. The interruption of this essential process ultimately leads to the cessation of bacterial growth and replication.