E-64c

Modify Date: 2024-01-03 20:41:48

E-64c Structure
E-64c structure
 Common Name E-64c
CAS Number 76684-89-4 Molecular Weight 314.377
Density 1.2±0.1 g/cm3 Boiling Point 596.4±50.0 °C at 760 mmHg
Molecular Formula C15H26N2O5 Melting Point N/A
MSDS Chinese USA Flash Point 314.5±30.1 °C

 Use of E-64c


E 64c is a derivative of naturally occurring epoxide inhibitor of cysteine proteases, a Calcium-activated neutral protease (CANP) inhibitor and a very weak irreversible cathepsin C inhibitor.

 Names

Name e-64c
Synonym More Synonyms

 E-64c Biological Activity

Description E 64c is a derivative of naturally occurring epoxide inhibitor of cysteine proteases, a Calcium-activated neutral protease (CANP) inhibitor and a very weak irreversible cathepsin C inhibitor.
Related Catalog
Target

Cysteine proteases[1], CANP[2], Cathepsin C[3].

In Vitro E-64c, a derivative of naturally occurring epoxide inhibitor of cysteine proteases, with papain; especially with regard to the hydrogen bonding and hydrophobic interactions of the ligands with conserved residues in the catalytic binding site[1]. E 64c (k2/Ki=140±5M-1s-1) is demonstrated to be a lead structure for the development of irreversible cathepsin C inhibitors[3].
In Vivo The t-1/2 of plasma E-64c is 0.48 hours. The hemodynamic effects of E-64c are absent at this dose. Using two way analysis of variance, the effects of reperfusion (p=0.0016) or E-64c (p=0.0226) per se on infarct size are significant. In comparing Group A with Group B and Group C with Group D, the depletion of CPK in the E-64c treated groups (Groups A and C) is slightly less than in the vehicle-injected groups (Groups B and D). The insufficient effect of E-64c alone may be explained by the early administration and relatively short t-1/2. Since the effectiveness of NCO-700 has been established,6),7) our findings might indicate a small but beneficial effect of E-64c on infarct size and CPK content[2].
Animal Admin Dogs[2] Studies are carried out in 83 mongrel dogs with a mean weight of 11.2kg. They are anesthetized with intravenous sodium thiamylal (7mg/kg). An intravenous bolus of E-64c (100mg/kg), dissolved in saturated sodium bicarbonate, is administered immediately before the occlusion and after reperfusion in Group A (n=17), whereas Group B (n=17) receive only the vehicle solution at these times. In the remaining 49 dogs (Groups C and D), the LAD is permanently ligated at the same level and an intravenous bolus of either Loxistatin acid (100mg/kg) (Group C; n=24) or vehicle only (Group D; n=25) is given immediately before and 1 hour after the ligation. The dose of E-64c is designed for its possible use in clinical practice and the estimated intramyocardial Loxistatin acid molecular concentration is 1,000 times that of total mCANP[2].
References

[1]. Khan MS, et al. Design, synthesis, evaluation and thermodynamics of 1-substituted pyridylimidazo[1,5-a]pyridine derivatives as cysteine protease inhibitors. PLoS One. 2013 Aug 5;8(8):e69982.

[2]. Toda G, et al. Calcium-activated neutral protease inhibitor (E-64c) and reperfusion for experimental myocardial infarction. Jpn Heart J. 1989 May;30(3):375-86.

[3]. Radzey H, et al. E-64c-hydrazide: a lead structure for the development of irreversible cathepsin C inhibitors. ChemMedChem. 2013 Aug;8(8):1314-21.

 Chemical & Physical Properties

Density 1.2±0.1 g/cm3
Boiling Point 596.4±50.0 °C at 760 mmHg
Molecular Formula C15H26N2O5
Molecular Weight 314.377
Flash Point 314.5±30.1 °C
Exact Mass 314.184174
PSA 108.03000
LogP 1.36
Vapour Pressure 0.0±3.6 mmHg at 25°C
Index of Refraction 1.504
Storage condition −20°C

 Toxicological Information

CHEMICAL IDENTIFICATION

RTECS NUMBER :
RR0404200
CHEMICAL NAME :
Oxiranecarboxylic acid, 3-(((3-methyl-1-(((3-methylbutyl)amino)carbonyl)butyl )amino) carbonyl)-, (2S-(2-alpha,3-beta(R*)))-
CAS REGISTRY NUMBER :
76684-89-4
LAST UPDATED :
199612
DATA ITEMS CITED :
6
MOLECULAR FORMULA :
C15-H26-N2-O5
MOLECULAR WEIGHT :
314.43

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
2140 mg/kg
TOXIC EFFECTS :
Behavioral - somnolence (general depressed activity) Behavioral - ataxia Lungs, Thorax, or Respiration - dyspnea
REFERENCE :
IYKEDH Iyakuhin Kenkyu. Study of Medical Supplies. (Nippon Koteisho Kyokai, 12-15, 2-chome, Shibuya, Shibuya-ku, Tokyo 150, Japan) V.1- 1970- Volume(issue)/page/year: 17,736,1986
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intravenous
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
>1 gm/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
IYKEDH Iyakuhin Kenkyu. Study of Medical Supplies. (Nippon Koteisho Kyokai, 12-15, 2-chome, Shibuya, Shibuya-ku, Tokyo 150, Japan) V.1- 1970- Volume(issue)/page/year: 17,736,1986
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
2400 mg/kg
TOXIC EFFECTS :
Behavioral - somnolence (general depressed activity) Behavioral - ataxia Lungs, Thorax, or Respiration - dyspnea
REFERENCE :
IYKEDH Iyakuhin Kenkyu. Study of Medical Supplies. (Nippon Koteisho Kyokai, 12-15, 2-chome, Shibuya, Shibuya-ku, Tokyo 150, Japan) V.1- 1970- Volume(issue)/page/year: 17,736,1986
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intravenous
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
>1 gm/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
IYKEDH Iyakuhin Kenkyu. Study of Medical Supplies. (Nippon Koteisho Kyokai, 12-15, 2-chome, Shibuya, Shibuya-ku, Tokyo 150, Japan) V.1- 1970- Volume(issue)/page/year: 17,736,1986 ** OTHER MULTIPLE DOSE TOXICITY DATA **
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
30 gm/kg/30D-C
TOXIC EFFECTS :
Liver - other changes Kidney, Ureter, Bladder - other changes Biochemical - Enzyme inhibition, induction, or change in blood or tissue levels - transaminases
REFERENCE :
KSRNAM Kiso to Rinsho. Clinical Report. (Yubunsha Co., Ltd., 1-5, Kanda Suda-Cho, Chiyoda-ku, KS Bldg., Tokyo 101, Japan) V.1- 1960- Volume(issue)/page/year: 20,2001,1986
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
7500 mg/kg/30D-C
TOXIC EFFECTS :
Liver - other changes Kidney, Ureter, Bladder - other changes Biochemical - Enzyme inhibition, induction, or change in blood or tissue levels - transaminases
REFERENCE :
KSRNAM Kiso to Rinsho. Clinical Report. (Yubunsha Co., Ltd., 1-5, Kanda Suda-Cho, Chiyoda-ku, KS Bldg., Tokyo 101, Japan) V.1- 1960- Volume(issue)/page/year: 20,2001,1986

 Safety Information

Personal Protective Equipment Eyeshields;Gloves;type N95 (US);type P1 (EN143) respirator filter
Hazard Codes Xi
RIDADR NONH for all modes of transport
WGK Germany 3
RTECS RR0404200

 Synthetic Route

 Articles31

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In order to elucidate the substrate specificity of the Sn subsites (n=1-3) of cathepsin B, its crystal structure inhibited by E64c [(+)-(2S,3S)-3-(1-[N-(3-methylbutyl)amino]-leucylcarbonyl)oxirane-2-c...

 Synonyms

2-Oxiranecarboxylic acid, 3-[[[(1S)-3-methyl-1-[[(3-methylbutyl)amino]carbonyl]butyl]amino]carbonyl]-, (2S,3S)-
Loxistatin acid
(2S,3S)-3-({(2S)-4-Methyl-1-[(3-methylbutyl)amino]-1-oxo-2-pentanyl}carbamoyl)-2-oxiranecarboxylic acid
(2S,3S)-3-({(2S)-4-methyl-1-[(3-methylbutyl)amino]-1-oxopentan-2-yl}carbamoyl)oxirane-2-carboxylic acid
L-TRANS-EPOXYSUCCINYL-LEU-3-METHYLBUTYLAMIDE
E-64c,EP 475
Inhibitorforthiolprotease
anecarboxylicacid
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