Chymostatin

- Overview
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    Background
    
    Ki: 9.36 and 13.1 nM for chymotrypsin and chymase, respectively
    Chymostatin is a chymotryptase-like serine proteases inhibitor.
    Serine proteases are enzymes cleaving peptide bonds, in which serine plays as the nucleophilic amino acid. Serine proteases can be classfied into two broad categories: chymotrypsin-like (trypsin-like) or subtilisin-like.
    In vitro: Chymostatin was found to be a potent inhibitor of human leucocyte chymotrypsin-like protease. Its affinity to the leucocyte protease was found to be much higher than its affinity to bovine pancreatic alpha-chymotrypsin. Chymsotatin also showed a weak inhibitory effect on the activity of human leucocyte elastase. In addition, the preincubation of chymostatin with 35SO2-4-labeled cartilage before the addition of the human chymotrypsin-like protease to the tissue could also inhibit 35SO2-4 release [1].
    In vivo: The effect of chymostatin on C57BL/6J-dy dystrophic mice was studied. The locomotor activity of normal mice markedly increased, attaining a plateau at 8 weeks of age. Serum levels of creatine phosphokinase were much higher in dystrophic mice when compared with normal mice, and dystrophic mice also showed a reduced muscle protein content. When 3-week-old dystrophic mice received chymostatin at 1 mg/kg, the decrease in locomotor activity could be retarded, serum enzyme levels significantly decreased, and muscle protein content also obviously increased. In addition, the survival time of chymostatin-treated dystrophic mice was prolonged [2].
    Clinical trial: So far, no clinical study has been conducted.
    
    [1] Feinstein, G. ,Malemud, C.J., and Janoff, A. The inhibition of human leucocyte elastase and chymotrypsin-like protease by elastatinal and chymostatin. Biochim.Biophys.Acta. 429(3), 925-932 (1976).
    [2] Komatsu K, Matsui A, Satoh S. Beneficial effect of chymostatin on dystrophic mice. Exp Neurol. 1986 Jul;93(1):110-6.
- Properties
  - Alternative Name
    
    (2R,6R,9R,12R)-6-((R)-2-amino-3,4,5,6-tetrahydropyrimidin-4-yl)-2,12-dibenzyl-9-isobutyl-4,7,10,13-tetraoxo-3,5,8,11-tetraazatridecan-1-oic acid
    
    CAS Number
    
    9076-44-2
    
    Molecular Formula
    
    C31H41O6N7
    
    Molecular Weight
    
    607.7
    
    Appearance
    
    A crystalline solid
    
    Purity
    
    Purity ≥ 95.00% (a mixture of A, B, C)
    
    Solubility
    
    ≤10mg/ml in DMSO
    
    Storage
    
    Store at -20°C
    
    * For Research Use Only

Chymostatin

Background

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