A tripeptide inhibitor of DPP-4
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Diprotin A

Item No. 28014

Product Insert (PDF)Safety Data Sheet (SDS) (PDF)
Technical Information
Formal Name
L-isoleucyl-L-prolyl-L-isoleucine
CAS Number
90614-48-5
Synonyms
  • Ile-Pro-Ile
Molecular Formula
C17H31N3O4
Formula Weight
341.5
Purity
≥98%
Formulation
A crystalline solid
Solubility(Learn about Variance in Solubility)
DMF: 33 mg/mlDMSO: 25 mg/mlEthanol: 10 mg/mlPBS (pH 7.2): 10 mg/ml
SMILES
O=C([C@@H](N)[C@@H](C)CC)N1CCC[C@H]1C(N[C@H](C(O)=O)[C@@H](C)CC)=O
InChi Code
InChI=1S/C17H31N3O4/c1-5-10(3)13(18)16(22)20-9-7-8-12(20)15(21)19-14(17(23)24)11(4)6-2/h10-14H,5-9,18H2,1-4H3,(H,19,21)(H,23,24)/t10-,11-,12-,13-,14-/m0/s1
InChi Key
JNTMAZFVYNDPLB-PEDHHIEDSA-N
Shipping & Storage Information
Storage
-20°C
Shipping
Room temperature in continental US; may vary elsewhere
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    10 mg

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    Cayman Chemical
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    OBESITY RESEARCH SOLUTIONS
    Product Description

    Diprotin A is a tripeptide inhibitor of dipeptidyl peptidase 4 (DPP-4; IC50 = 1.1 μg/ml).1 It inhibits degradation of glucagon-like peptide 1 (GLP-1; Item No. 24460) in culture with insulin-secreting BRIN-BD11 rat pancreatic β-cells when used at a concentration of 25 μM.2 Diprotin A (5 mg/ml) pre-incubation enhances chemotaxis of murine embryonic stem cells towards stromal cell-derived factor-1 (SDF-1/CXCL12) in vitro.3 Pre-incubation of CD34+ human umbilical cord blood cells with diprotin A (5 mM) prior to injection increases engraftment in NOD/SCID recipient mice.4

    WARNING This product is not for human or veterinary use.

    References & Product Citations
    Product Description References

    1. Umezawa, H., Aoyagi, T., Ogawa, K., et al. Diprotins A and B, inhibitors of dipeptidyl aminopeptidase IV, produced by bacteria. J. Antibiot. (Tokyo) 37(4), 422-425 (1984).

    2. Green, B.D., Liu, H.K., McCluskey, J.T., et al. Function of a long-term, GLP-1-treated, insulin-secreting cell line is improved by preventing DPP IV-mediated degradation of GLP-1. Diabetes Obes. Metab. 7(5), 563-569 (2005).

    3. Guo, Y., Hangoc, G., Bian, H., et al. SDF-1/CXCL12 enhances survival and chemotaxis of murine embryonic stem cells and production of primitive and definitive hematopoietic progenitor cells. Stem Cells 23(9), 1324-1332 (2005).

    4. Campbell, T.B., Hangoc, G., Liu, Y., et al. Inhibition of CD26 in human cord blood CD34+ cells enhances their engraftment of nonobese diabetic/severe combined immunodeficiency mice. Stem Cells Dev. 16(3), 347-354 (2007).