U.S. Department of Health & Human Services Divider Arrow National Institutes of Health Divider Arrow NCATS

Details

Stereochemistry ABSOLUTE
Molecular Formula C9H13N3O6
Molecular Weight 259.216
Optical Activity UNSPECIFIED
Defined Stereocenters 4 / 4
E/Z Centers 0
Charge 0

SHOW SMILES / InChI
Structure of MIZORIBINE

SMILES

NC(=O)C1=C(O)N(C=N1)[C@@H]2O[C@H](CO)[C@@H](O)[C@H]2O

InChI

InChIKey=HZQDCMWJEBCWBR-UUOKFMHZSA-N
InChI=1S/C9H13N3O6/c10-7(16)4-8(17)12(2-11-4)9-6(15)5(14)3(1-13)18-9/h2-3,5-6,9,13-15,17H,1H2,(H2,10,16)/t3-,5-,6-,9-/m1/s1

HIDE SMILES / InChI

Molecular Formula C9H13N3O6
Molecular Weight 259.216
Charge 0
Count
Stereochemistry ABSOLUTE
Additional Stereochemistry No
Defined Stereocenters 4 / 4
E/Z Centers 0
Optical Activity UNSPECIFIED

Description
Curator's Comment: description was created based on several sources, including http://www.ncbi.nlm.nih.gov/pubmed/20052390

Mizoribine (MZB) is an imidazole nucleoside and an immunosuppressive agent. Eupenicillium brefeldianum, an ascomycetes harvested from the soil of Hachijo Island, Tokyo, Japan, in 1971, produces mizoribine (MZB). MZB is a nucleoside of the imidazole class, and was found to have weak antimicrobial activity against Candida albicans, but it proved ineffective against experimental candidiasis. MZB has been approved in Japan for the treatment of lupus nephritis (1990), rheumatoid arthritis (1992), and primary nephritic syndrome (1995), and in these diseases, it has often been used in combination with corticosteroids and/or anti-inflammatory drugs. Mizoribine also has been used in renal transplantation, and in steroid-resistant nephrotic syndrome. After phosphorylation, misoribine-5’-monophosphate (MZB-P) inhibits guanosine monophosphate (GMP) synthesis by antagonistic blocking of inosine monophasphate dehydrogenase (IMPDH) and GMP-synthetase in the pathway from inosine [ 5’-] monophasphate (IMP) to GMP in the purine synthesis system. MZB-P appears to almost completely inhibits guanine nucleotide synthesis Suppressive effect of MZB on cell growth is attributable to MZB-P and not to MZB itself. Thus, MZB has less toxicity than azathioprine, another immunosuppressant used for some of the same diseases.

Approval Year

Targets

Targets

Conditions

Conditions

ConditionModalityTargetsHighest PhaseProduct
Primary
MIZORIBINE

Approved Use

Unknown

Launch Date

1989
Primary
MIZORIBINE

Approved Use

Unknown

Launch Date

1991
Primary
Mizoribine

Approved Use

Unknown

Launch Date

1994
Cmax

Cmax

ValueDoseCo-administeredAnalytePopulation
2.7 μg/mL
3 mg/kg single, oral
dose: 3 mg/kg
route of administration: Oral
experiment type: SINGLE
co-administered:
MIZORIBINE serum
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FASTED
5.5 μg/mL
6 mg/kg single, oral
dose: 6 mg/kg
route of administration: Oral
experiment type: SINGLE
co-administered:
MIZORIBINE serum
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FASTED
6.6 μg/mL
9 mg/kg single, oral
dose: 9 mg/kg
route of administration: Oral
experiment type: SINGLE
co-administered:
MIZORIBINE serum
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FASTED
9.6 μg/mL
12 mg/kg single, oral
dose: 12 mg/kg
route of administration: Oral
experiment type: SINGLE
co-administered:
MIZORIBINE serum
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FASTED
4.7 μg/mL
6 mg/kg 1 times / day multiple, oral
dose: 6 mg/kg
route of administration: Oral
experiment type: MULTIPLE
co-administered:
MIZORIBINE serum
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FASTED
4.6 μg/mL
6 mg/kg 2 times / day multiple, oral
dose: 6 mg/kg
route of administration: Oral
experiment type: MULTIPLE
co-administered:
MIZORIBINE serum
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FASTED
2.3 μg/mL
100 mg single, oral
dose: 100 mg
route of administration: Oral
experiment type: SINGLE
co-administered:
MIZORIBINE serum
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FASTED
AUC

AUC

ValueDoseCo-administeredAnalytePopulation
18.1 μg × h/mL
3 mg/kg single, oral
dose: 3 mg/kg
route of administration: Oral
experiment type: SINGLE
co-administered:
MIZORIBINE serum
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FASTED
38.3 μg × h/mL
6 mg/kg single, oral
dose: 6 mg/kg
route of administration: Oral
experiment type: SINGLE
co-administered:
MIZORIBINE serum
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FASTED
46.4 μg × h/mL
9 mg/kg single, oral
dose: 9 mg/kg
route of administration: Oral
experiment type: SINGLE
co-administered:
MIZORIBINE serum
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FASTED
61.9 μg × h/mL
12 mg/kg single, oral
dose: 12 mg/kg
route of administration: Oral
experiment type: SINGLE
co-administered:
MIZORIBINE serum
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FASTED
35.5 μg × h/mL
6 mg/kg 1 times / day multiple, oral
dose: 6 mg/kg
route of administration: Oral
experiment type: MULTIPLE
co-administered:
MIZORIBINE serum
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FASTED
31.2 μg × h/mL
6 mg/kg 2 times / day multiple, oral
dose: 6 mg/kg
route of administration: Oral
experiment type: MULTIPLE
co-administered:
MIZORIBINE serum
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FASTED
13.2 μg × h/mL
100 mg single, oral
dose: 100 mg
route of administration: Oral
experiment type: SINGLE
co-administered:
MIZORIBINE serum
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FASTED
T1/2

T1/2

ValueDoseCo-administeredAnalytePopulation
2.9 h
3 mg/kg single, oral
dose: 3 mg/kg
route of administration: Oral
experiment type: SINGLE
co-administered:
MIZORIBINE serum
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FASTED
2.7 h
6 mg/kg single, oral
dose: 6 mg/kg
route of administration: Oral
experiment type: SINGLE
co-administered:
MIZORIBINE serum
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FASTED
2.8 h
9 mg/kg single, oral
dose: 9 mg/kg
route of administration: Oral
experiment type: SINGLE
co-administered:
MIZORIBINE serum
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FASTED
2.9 h
12 mg/kg single, oral
dose: 12 mg/kg
route of administration: Oral
experiment type: SINGLE
co-administered:
MIZORIBINE serum
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FASTED
3 h
6 mg/kg 1 times / day multiple, oral
dose: 6 mg/kg
route of administration: Oral
experiment type: MULTIPLE
co-administered:
MIZORIBINE serum
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FASTED
3.1 h
6 mg/kg 2 times / day multiple, oral
dose: 6 mg/kg
route of administration: Oral
experiment type: MULTIPLE
co-administered:
MIZORIBINE serum
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FASTED
3.1 h
100 mg single, oral
dose: 100 mg
route of administration: Oral
experiment type: SINGLE
co-administered:
MIZORIBINE serum
Homo sapiens
population: HEALTHY
age: ADULT
sex: MALE
food status: FASTED
Doses

Doses

DosePopulationAdverse events​
12 mg/kg single, oral
Highest studied dose
healthy, ADULT
6 mg/kg 2 times / day multiple, oral
Highest studied dose
Dose: 6 mg/kg, 2 times / day
Route: oral
Route: multiple
Dose: 6 mg/kg, 2 times / day
Sources:
healthy, ADULT
Other AEs: Uric acid increased...
300 mg 2 times / day multiple, oral
Recommended
Dose: 300 mg, 2 times / day
Route: oral
Route: multiple
Dose: 300 mg, 2 times / day
Sources:
unhealthy, ADULT
Health Status: unhealthy
Age Group: ADULT
Sex: M
Food Status: UNKNOWN
Sources:
Disc. AE: Renal failure, Hyperuricemia...
AEs leading to
discontinuation/dose reduction:
Renal failure
Hyperuricemia
Sources:
50 mg 3 times / day multiple, oral
Recommended
Dose: 50 mg, 3 times / day
Route: oral
Route: multiple
Dose: 50 mg, 3 times / day
Sources:
unhealthy, ADULT
Health Status: unhealthy
Age Group: ADULT
Sex: M+F
Food Status: UNKNOWN
Sources:
Disc. AE: Pruritus, Joint pain...
AEs leading to
discontinuation/dose reduction:
Pruritus (1.7%)
Joint pain (1.7%)
Alteration of consciousness (1.7%)
Liver disease (1.7%)
Nausea (1.7%)
Vomiting (1.7%)
Diarrhea (1.7%)
Abdominal pain (1.7%)
Sources:
AEs

AEs

AESignificanceDosePopulation
Uric acid increased
6 mg/kg 2 times / day multiple, oral
Highest studied dose
Dose: 6 mg/kg, 2 times / day
Route: oral
Route: multiple
Dose: 6 mg/kg, 2 times / day
Sources:
healthy, ADULT
Hyperuricemia Disc. AE
300 mg 2 times / day multiple, oral
Recommended
Dose: 300 mg, 2 times / day
Route: oral
Route: multiple
Dose: 300 mg, 2 times / day
Sources:
unhealthy, ADULT
Health Status: unhealthy
Age Group: ADULT
Sex: M
Food Status: UNKNOWN
Sources:
Renal failure Disc. AE
300 mg 2 times / day multiple, oral
Recommended
Dose: 300 mg, 2 times / day
Route: oral
Route: multiple
Dose: 300 mg, 2 times / day
Sources:
unhealthy, ADULT
Health Status: unhealthy
Age Group: ADULT
Sex: M
Food Status: UNKNOWN
Sources:
Abdominal pain 1.7%
Disc. AE
50 mg 3 times / day multiple, oral
Recommended
Dose: 50 mg, 3 times / day
Route: oral
Route: multiple
Dose: 50 mg, 3 times / day
Sources:
unhealthy, ADULT
Health Status: unhealthy
Age Group: ADULT
Sex: M+F
Food Status: UNKNOWN
Sources:
Alteration of consciousness 1.7%
Disc. AE
50 mg 3 times / day multiple, oral
Recommended
Dose: 50 mg, 3 times / day
Route: oral
Route: multiple
Dose: 50 mg, 3 times / day
Sources:
unhealthy, ADULT
Health Status: unhealthy
Age Group: ADULT
Sex: M+F
Food Status: UNKNOWN
Sources:
Diarrhea 1.7%
Disc. AE
50 mg 3 times / day multiple, oral
Recommended
Dose: 50 mg, 3 times / day
Route: oral
Route: multiple
Dose: 50 mg, 3 times / day
Sources:
unhealthy, ADULT
Health Status: unhealthy
Age Group: ADULT
Sex: M+F
Food Status: UNKNOWN
Sources:
Joint pain 1.7%
Disc. AE
50 mg 3 times / day multiple, oral
Recommended
Dose: 50 mg, 3 times / day
Route: oral
Route: multiple
Dose: 50 mg, 3 times / day
Sources:
unhealthy, ADULT
Health Status: unhealthy
Age Group: ADULT
Sex: M+F
Food Status: UNKNOWN
Sources:
Liver disease 1.7%
Disc. AE
50 mg 3 times / day multiple, oral
Recommended
Dose: 50 mg, 3 times / day
Route: oral
Route: multiple
Dose: 50 mg, 3 times / day
Sources:
unhealthy, ADULT
Health Status: unhealthy
Age Group: ADULT
Sex: M+F
Food Status: UNKNOWN
Sources:
Nausea 1.7%
Disc. AE
50 mg 3 times / day multiple, oral
Recommended
Dose: 50 mg, 3 times / day
Route: oral
Route: multiple
Dose: 50 mg, 3 times / day
Sources:
unhealthy, ADULT
Health Status: unhealthy
Age Group: ADULT
Sex: M+F
Food Status: UNKNOWN
Sources:
Pruritus 1.7%
Disc. AE
50 mg 3 times / day multiple, oral
Recommended
Dose: 50 mg, 3 times / day
Route: oral
Route: multiple
Dose: 50 mg, 3 times / day
Sources:
unhealthy, ADULT
Health Status: unhealthy
Age Group: ADULT
Sex: M+F
Food Status: UNKNOWN
Sources:
Vomiting 1.7%
Disc. AE
50 mg 3 times / day multiple, oral
Recommended
Dose: 50 mg, 3 times / day
Route: oral
Route: multiple
Dose: 50 mg, 3 times / day
Sources:
unhealthy, ADULT
Health Status: unhealthy
Age Group: ADULT
Sex: M+F
Food Status: UNKNOWN
Sources:
PubMed

PubMed

TitleDatePubMed
Novel anticytomegalovirus activity of immunosuppressant mizoribine and its synergism with ganciclovir.
2010-06
The immunosuppressive drug mizoribine directly prevents podocyte injury in puromycin aminonucleoside nephrosis.
2010
Inhibitory effect of mizoribine and ribavirin on the replication of severe acute respiratory syndrome (SARS)-associated coronavirus.
2005-06
Mizoribine inhibits hepatitis C virus RNA replication: effect of combination with interferon-alpha.
2005-05-13
Inhibition of bovine viral diarrhea virus (BVDV) by mizoribine: synergistic effect of combination with interferon-alpha.
2004-12
Inhibitors of the IMPDH enzyme as potential anti-bovine viral diarrhoea virus agents.
2002-11
Inosine-5'-monophosphate dehydrogenase is required for mitogenic competence of transformed pancreatic beta cells.
2001-01
Mizoribine in steroid-dependent nephrotic syndrome of childhood.
1997-10
Mizoribine reduces urinary protein excretion in rats given puromycin aminonucleoside.
1996
[Comparison of the effects of various immunosuppressive drugs on subrenal capsule assay (SRC assay)].
1990-07
[Suppressive effect of mizoribine on progression of bovine serum albumin nephritis in mice].
1987-04
Patents

Sample Use Guides

Oral administration, daily dose of 150mg (50mg/tablet)
Route of Administration: Oral
In Vitro Use Guide
The immunosuppressive drug Mizoribine (MIZ) was found to increase the antiviral activity of Acyclovir (ACV) against herpesvirus infections, raising interesting perspectives on new combined therapeutic strategies. In this study the anti-CpHV-1 activity in vitro of ACV alone or in combination with MIZ was characterized. When applied alone at non-toxic concentrations, ACV had a slight effect on CpHV-1 replication while in combination with MIZ a dose-dependent inhibition of the virus yield was observed with an IC50 of ACV of 28.5 µM.
Substance Class Chemical
Created
by admin
on Mon Mar 31 18:07:02 GMT 2025
Edited
by admin
on Mon Mar 31 18:07:02 GMT 2025
Record UNII
4JR41A10VP
Record Status Validated (UNII)
Record Version
  • Download
Name Type Language
MIZORIBINE
INN   JAN   MART.   MI   WHO-DD  
INN  
Official Name English
BREDININ
Preferred Name English
NSC-289637
Code English
MIZORIBINE [MART.]
Common Name English
MIZORIBINE [MI]
Common Name English
MIZORIBINE [JAN]
Common Name English
5-HYDROXY-1-.BETA.-D-RIBOFURANOSYLIMIDAZOLE-4-CARBOXAMIDE
Common Name English
mizoribine [INN]
Common Name English
Mizoribine [WHO-DD]
Common Name English
Classification Tree Code System Code
FDA ORPHAN DRUG 780820
Created by admin on Mon Mar 31 18:07:03 GMT 2025 , Edited by admin on Mon Mar 31 18:07:03 GMT 2025
NCI_THESAURUS C574
Created by admin on Mon Mar 31 18:07:03 GMT 2025 , Edited by admin on Mon Mar 31 18:07:03 GMT 2025
Code System Code Type Description
SMS_ID
100000080884
Created by admin on Mon Mar 31 18:07:03 GMT 2025 , Edited by admin on Mon Mar 31 18:07:03 GMT 2025
PRIMARY
EVMPD
SUB09019MIG
Created by admin on Mon Mar 31 18:07:03 GMT 2025 , Edited by admin on Mon Mar 31 18:07:03 GMT 2025
PRIMARY
INN
5120
Created by admin on Mon Mar 31 18:07:03 GMT 2025 , Edited by admin on Mon Mar 31 18:07:03 GMT 2025
PRIMARY
NSC
289637
Created by admin on Mon Mar 31 18:07:03 GMT 2025 , Edited by admin on Mon Mar 31 18:07:03 GMT 2025
PRIMARY
MERCK INDEX
m7578
Created by admin on Mon Mar 31 18:07:03 GMT 2025 , Edited by admin on Mon Mar 31 18:07:03 GMT 2025
PRIMARY Merck Index
DRUG BANK
DB12617
Created by admin on Mon Mar 31 18:07:03 GMT 2025 , Edited by admin on Mon Mar 31 18:07:03 GMT 2025
PRIMARY
ChEMBL
CHEMBL245019
Created by admin on Mon Mar 31 18:07:03 GMT 2025 , Edited by admin on Mon Mar 31 18:07:03 GMT 2025
PRIMARY
CAS
50924-49-7
Created by admin on Mon Mar 31 18:07:02 GMT 2025 , Edited by admin on Mon Mar 31 18:07:02 GMT 2025
PRIMARY
EPA CompTox
DTXSID8045777
Created by admin on Mon Mar 31 18:07:03 GMT 2025 , Edited by admin on Mon Mar 31 18:07:03 GMT 2025
PRIMARY
MESH
C010052
Created by admin on Mon Mar 31 18:07:02 GMT 2025 , Edited by admin on Mon Mar 31 18:07:02 GMT 2025
PRIMARY
FDA UNII
4JR41A10VP
Created by admin on Mon Mar 31 18:07:03 GMT 2025 , Edited by admin on Mon Mar 31 18:07:03 GMT 2025
PRIMARY
WIKIPEDIA
Mizoribine
Created by admin on Mon Mar 31 18:07:03 GMT 2025 , Edited by admin on Mon Mar 31 18:07:03 GMT 2025
PRIMARY
DRUG CENTRAL
3363
Created by admin on Mon Mar 31 18:07:03 GMT 2025 , Edited by admin on Mon Mar 31 18:07:03 GMT 2025
PRIMARY
NCI_THESAURUS
C66172
Created by admin on Mon Mar 31 18:07:02 GMT 2025 , Edited by admin on Mon Mar 31 18:07:02 GMT 2025
PRIMARY
PUBCHEM
104762
Created by admin on Mon Mar 31 18:07:03 GMT 2025 , Edited by admin on Mon Mar 31 18:07:03 GMT 2025
PRIMARY
Related Record Type Details
ACTIVE MOIETY