Semapimod tetrahydrochloride  (Synonyms: CNI-1493; CPSI-2364 tetrahydrochloride)

Semapimod tetrahydrochloride (CNI-1493), an inhibitor of proinflammatory cytokine production, can inhibit TNF-α, IL-1β, and IL-6. Semapimod tetrahydrochloride inhibits TLR4 signaling (IC₅₀≈0.3 μM). Semapimod tetrahydrochloride inhibits p38 MAPK and nitric oxide production in macrophages. Semapimod tetrahydrochloride has potential in a variety of inflammatory and autoimmune disorders^[1][2][3].

Semapimod tetrahydrochloride leads to a significant decrease of p38-MAPK phosphorylation in macrophages, proinflammatory gene expression of macrophage inflammatory protein-1alpha, interleukin-6, monocyte chemoattractant protein-1, and intercellular adhesion molecule-1, and neutrophil infiltration. Semapimod tetrahydrochloride completely abrogated nitric oxide production within the tunica muscularis^[2].
Semapimod tetrahydrochloride desensitizes TLR signaling via its effect on the TLR chaperone gp96. Semapimod tetrahydrochloride inhibits ATP-binding and ATPase activities of gp96 in vitro (IC₅₀≈0.2-0.4 μM). Semapimod tetrahydrochloride desensitizes TLR signaling via its effect on the TLR chaperone gp96^[3].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Semapimod tetrahydrochloride (5 mg/kg; i.p; daily for 2 weeks) ameliorates endothelial dysfunction in Obese Zucker (OZ) rats^[1].
Semapimod tetrahydrochloride restores AM-induced akt phosphorylation and cGMP production in OZ rats^[1].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

890.74

Solid

C₃₄H₅₆Cl₄N₁₈O₂

164301-51-3

O=C(NC1=CC(/C(C)=N/NC(N)=N)=CC(/C(C)=N/NC(N)=N)=C1)CCCCCCCCC(NC2=CC(/C(C)=N/NC(N)=N)=CC(/C(C)=N/NC(N)=N)=C2)=O.[H]Cl.[H]Cl.[H]Cl.[H]Cl

Room temperature in continental US; may vary elsewhere.

-20°C, sealed storage, away from moisture and light

*In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture and light)

• [1]. Nishimatsu H, et al. Blockade of endogenous proinflammatory cytokines ameliorates endothelial dysfunction in obese Zucker rats. Hypertens Res. 2008;31(4):737‐743.  [Content Brief]

  [2]. Wehner S, Set al. Inhibition of p38 mitogen-activated protein kinase pathway as prophylaxis of postoperative ileus in mice. Gastroenterology. 2009;136(2):619‐629.  [Content Brief]

  [3]. Wang J, et al. Experimental Anti-Inflammatory Drug Semapimod Inhibits TLR Signaling by Targeting the TLR Chaperone gp96. J Immunol. 2016;196(12):5130‐5137.  [Content Brief]