Cyclosporin A

from Tolypocladium inflatum, ≥95% (HPLC), solid

Antibiotic S 7481F1, Cyclosporine
Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
Beilstein/REAXYS Number:
MDL number:
PubChem Substance ID:

Quality Level

biological source

Tolypocladium inflatum


≥95% (HPLC)






dichloromethane: 10 mg/mL
ethanol: 10 mg/mL
DMSO: 50 mg/mL
chloroform: 6 mg/mL
H2O: insoluble

Mode of action

enzyme | inhibits

antibiotic activity spectrum




storage temp.


SMILES string




InChI key


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5, 10 mg in glass bottle

Biochem/physiol Actions

A fungal metabolite possessing potent immunosuppressive properties. It inhibits the T-cell receptor signal transduction pathway via the formation of cyclosporin A−cyclophilin complex that inhibits calcineurin (protein phosphatase 2B). Inhibits nitric oxide synthesis induced by interleukin 1α, lipopolysaccharides and TNFα. Can block cytochrome c release from mitochondria.

Features and Benefits

This compound is also offered as part of Sigma′s Library of Pharmacologically Active Compounds (LOPAC®1280), a biologically annotated collection of high-quality, ready-to-screen compounds. Click here to learn more.

Legal Information

LOPAC is a registered trademark of Sigma-Aldrich Co. LLC


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Signal Word


Hazard Statements

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves


NONH for all modes of transport

WGK Germany


Certificate of Analysis

Certificate of Origin

Lotte Coelmont et al.
Antimicrobial agents and chemotherapy, 53(3), 967-976 (2008-12-24)
Debio 025 is a potent inhibitor of hepatitis C virus (HCV) replication (J. Paeshuyse et al., Hepatology 43:761-770, 2006). In phase I clinical studies, monotherapy (a Debio 025 dose of 1,200 mg twice a day) resulted in a mean maximal...
Xiao-Ling Liu et al.
Bioorganic & medicinal chemistry, 16(1), 171-180 (2007-10-30)
A library of chalcones with basic functionalities were screened for inhibition of P-glycoprotein (Pgp, ABCB1) by the calcein-AM accumulation assay on MDCKII/MDR1 cells. Three members that had ring A substituted with 5-(1-ethylpiperidin-4-yl) and 2,4-dimethoxy groups were found to increase calcein-AM...
Mi-Yeon Jang et al.
Journal of medicinal chemistry, 54(2), 655-668 (2010-12-22)
Herein we describe the synthesis and in vitro and in vivo activity of thiazolo[5,4-d]pyrimidines as a novel class of immunosuppressive agents, useful for preventing graft rejection after organ transplantation. This research resulted in the discovery of a series of compounds...
Roger G Ptak et al.
Antimicrobial agents and chemotherapy, 52(4), 1302-1317 (2008-01-24)
Debio-025 is a synthetic cyclosporine with no immunosuppressive capacity but a high inhibitory potency against cyclophilin A (CypA)-associated cis-trans prolyl isomerase (PPIase) activity. A lack of immunosuppressive effects compared to that of cyclosporine was demonstrated both in vitro and in...
Javier Koh et al.
Nature communications, 10(1), 2820-2820 (2019-06-30)
Bats are unusual mammals, with the ability to fly, and long lifespans. In addition, bats have a low incidence of cancer, but the mechanisms underlying this phenomenon remain elusive. Here we discovered that bat cells are more resistant than human...
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