ST 2825

• CAT Number: I005356
• CAS Number: 894787-30-5
• Molecular Formula: C27H28Cl2N4O5S
• Molecular Weight: 591.51
• Purity: ≥95%
• Synonyms: (4R,7R,8aR)-1′-[2-[4-[[2-(2,4-dichlorophenoxy)acetyl]amino]phenyl]acetyl]-6-oxospiro[3,4,8,8a-tetrahydro-2H-pyrrolo[2,1-b][1,3]thiazine-7,2′-pyrrolidine]-4-carboxamide
• InChI: InChI=1S/C27H28Cl2N4O5S/c28-17-4-7-21(19(29)13-17)38-15-22(34)31-18-5-2-16(3-6-18)12-23(35)32-10-1-9-27(32)14-24-33(26(27)37)20(25(30)36)8-11-39-24/h2-7,13,20,24H,1,8-12,14-15H2,(H2,30,36)(H,31,34)/t20-,24-,27-/m1/s1
• InChIKey: HBLHLJXFIPCEMW-ZJSFPPFMSA-N
• SMILES: C1CC2(CC3N(C2=O)C(CCS3)C(=O)N)N(C1)C(=O)CC4=CC=C(C=C4)NC(=O)COC5=C(C=C(C=C5)Cl)Cl

ST 2825 is a specific MyD88 dimerization inhibitor. ST2825 interferes with recruitment of IRAK1 and IRAK4 by MyD88, causing inhibition of IL-1β-mediated activation of NF-κB transcriptional activity[1][2].
ST2825 blocks IL-1R/TLR signaling by interfering with MyD88 homodimerization. ST2825 inhibits this interaction in a concentration-dependent manner with ~40% inhibition of dimerization at 5 μM ST2825 and 80% inhibition at 10 μM ST2825[1].
ST2825 dose-dependently inhibits IL-1β-induced production of IL-6 in treated mice after oral administration. The animals are administered orally with the appropriate vehicles or ST2825 at doses ranging from 50 to 200 mg/kg, 5 min prior to i.p. injection with 20 μg/kg IL-1β. ST2825 exertes a significant inhibition of IL-1β-stimulated production of IL-6 at 100 and 200 mg/kg[1].

Reference

[1]. Loiarro M, et al. Pivotal advance: inhibition of MyD88 dimerization and recruitment of IRAK1 and IRAK4 by a novel peptidomimetic compound. J Leukoc Biol. 2007 Oct;82(4):801-10.
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[2]. Fantò N, et al. Design, Synthesis, and In Vitro Activity of Peptidomimetic Inhibitors of Myeloid Differentiation Factor 88. J Med Chem. 2008 Mar 13;51(5):1189-202.
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[3]. Van Tassell BW, et al. Pharmacologic Inhibition of Myeloid Differentiation Factor 88 (MyD88) Prevents Left Ventricular Dilation and Hypertrophy After Experimental Acute Myocardial Infarction in the Mouse. J Cardiovasc Pharmacol. 2010 Apr;55(4):385-90.
 [Content Brief]

[4]. Zhang HS, et al. Inhibition of myeloid differentiation factor 88(MyD88) by ST2825 provides neuroprotection after experimental traumatic brain injury in mice. Brain Res. 2016 Jul 15;1643:130-9.
 [Content Brief]

[5]. Wang N, et al. Myeloid differentiation factor 88 is up-regulated in epileptic brain and contributes to experimental seizures in rats. Exp Neurol. 2017 Sep;295:23-35.
 [Content Brief]

[6]. Brad Griesenauer, et al. ST2/MYD88 signaling is a therapeutic target alleviating murine acute graft-versus-host disease sparing T regulatory cell function. Indiana University. May 2018.