Diprotin A

• CAT Number: R008817
• CAS Number: 90614-48-5
• Molecular Formula: C17H31N3O4
• Molecular Weight: 341.45
• Purity: ≥95%
• Synonyms: (2S,3S)-2-[[(2S)-1-[(2S,3S)-2-amino-3-methylpentanoyl]pyrrolidine-2-carbonyl]amino]-3-methylpentanoic acid
• InChI: 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
• InChIKey: JNTMAZFVYNDPLB-PEDHHIEDSA-N
• SMILES: CCC(C)C(C(=O)N1CCCC1C(=O)NC(C(C)CC)C(=O)O)N

Diprotin A (Ile-Pro-Ile) is an inhibitor of dipeptidyl peptidase IV (DPP-IV)[1].
Diprotin A (100 μM; 30 minutes after CXCR4-blocker or Src-inhibitor treatment) induces the phosphorylation of Src [Tyr 416] and VE-cadherin [Tyr731] in hECs in both normoxia and H/R conditions in human endothelial cells and disrupts endothelial cell-to-cell junctions, which are attenuated by CXCR4 (receptor of SDF-1α)-blocker or Src-inhibitor[1].
Diprotin A (intraperitoneal injection; 70 μg/kg; twice daily; 7 days) increases the phosphorylation of Src and VE-cadherin and aggravates vascular leakage in the retinas. Collectively, Diprotin A induces vascular leakage by augmenting the SDF-1α/CXCR4/Src/VE-cadherin signaling pathway[1].

Reference

[1]. Lee CS, et al. Dipeptidyl Peptidase-4 Inhibitor Increases Vascular Leakage in Retina through VE-cadherin Phosphorylation. Sci Rep. 2016 Jul 6;6:29393.
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