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].
UM-164 is a highly potent inhibitor of c-Src with a Kd of 2.7 nM. UM-164 also potently inhibits p38α and p38β.
Tat-NR2B9c is a 20-aa peptide, which acts as a postsynaptic density-95 (PSD-95) inhibitor, with an EC50 of 6.7 nM for PSD-95d2 (PSD-95 PDZ domain 2), and 670 nM for PSD-95d1; Tat-NR2B9c also reduces NMDA-induced p38 activation, and possesses neuroprotective efficacy.
(E)-Osmundacetone is the isomer of Osmundacetone. Osmundacetone significantly suppresses the phosphorylation of MAPKs, including JNK, ERK, and p38 kinases. Osmundacetone has a neuroprotective effect against oxidative stress[1].
Tat-NR2B9c (TFA) is a 20-aa peptide, which acts as a postsynaptic density-95 (PSD-95) inhibitor, with an EC50 of 6.7 nM for PSD-95d2 (PSD-95 PDZ domain 2), and 670 nM for PSD-95d1[1]. Tat-NR2B9c also reduces NMDA-induced p38 activation, and possesses neuroprotective efficacy[2].
Anti-inflammatory agent 35 (compound 5a27) is an orally active curcumin analogue with anti-inflammatory activity. Anti-inflammatory agent 35 blocks mitogen-activated protein kinase (MAPK) signaling and p65 nuclear translocation of NF-kB. Anti-inflammatory agent 35 also inhibits yellow neutrophil infiltration and pro-inflammatory cytokine production. Anti-inflammatory agent 35 significantly attenuates lipopolysaccharide (LPS)-induced acute lung injury (ALI) in vivo[1].
p38 Kinase inhibitor 4 (compound 135) is a potent p38 inhibitor[1].
MW-150 hydrochloride (MW01-18-150SRM hydrochloride) is a selective inhibitor of p38αMAPK isoform with a ki of 101 nM[1].
p38α inhibitor 3 (Comp G7) is a p38α inhibitor that blocks the effectiveness of myoblast differentiation[1].
p38-α MAPK-IN-4 (Compound 69) is a selective p38α MAPK inhibitor with an IC50 of 1.5 µM. p38-α MAPK-IN-4 rapidly and strongly prevents the development of mechanical allodynia (MA) in vivo[1].
Aspirin (Acetylsalicylic Acid) lithium is an orally active, potent and irreversible inhibitor of cyclooxygenase COX-1 and COX-2, with IC50 values of 5 and 210 μg/mL, respectively. Aspirin lithium induces apoptosis. Aspirin lithium inhibits the activation of NF-κB. Aspirin lithium also inhibits platelet prostaglandin synthetase, and can prevent coronary artery and cerebrovascular thrombosis[1][2][3][4][5][6].
Neflamapimod (VX-745) is a potent and selective inhibitor of p38α, and possesses anti-inflammatory activity.
SB-242235 is a potent and selective p38 MAP kinase inhibitor with IC50 of 1.0 uM.IC50 Value: 1.0 uM [1]Target: p38 MAPKin vitro: SB 242235 inhibited intracellular p38 activity, human chondrocytes were treated with different doses of SB 242235 prior to stimulation with IL-1_ for 15 min. MAPKAP K2 was then isolated from these cells and assayed using HSP27 as a substrate. SB 242235 dose-dependently inhibited the activation of MAPKAP K2 with an IC50 of 1.0 uM [1].in vivo: SB-242235 demonstrates generally favourable pharmacokinetic properties in all species examined(including rat, dog and monkey). Systemic plasma clearance was high in rat, but in the non-rodent species SB-242235 demonstrated low to moderate clearance with plasma half-lives > 4h. Oral bioavailability in each preclinical species was high. In rat and monkey, SB-242235 demonstrated non-linear elimination kinetics that manifested as a decrease in clearance with increasing dose and apparent oral bioavailability > 100% at high oral doses [2].In the skin of SKH-1 hairless mice, SB242235, prior to UVB irradiation, blocked activation of the p38 MAPK cascade, and abolished MAPKAPK-2 kinase activity and phosphorylation of HSP27. Moreover, SB242235 inhibited expression of the pro-inflammatory cytokines interleukin (IL)-6 and KC (murine IL-8) and COX-2 [3]. The preclinical pharmacokinetics of SB-242235 have been described previously. The present studies were conducted to describe the in vitro metabolic rates and routes of SB-242235 metabolism, to characterize its in vivo preclinical metabolism, and to use these data to aid in the prediction of the pharmacokinetic behaviour of SB-242235 in man [4].
Cannabisin D inhibits proliferation and migration of glioblastoma cells through MAPKs signaling[1].
Emodic acid (NSC624610) is an anthraquinone compound isolated from A. microcarpus, which can inhibit the proliferation of cancer cells by inhibiting the activity of NF-κB. Emodic acid can also inhibit the phosphorylation of p38, ERK and JNK, the secretion of tumor-promoting cytokines IL-1β and IL-6, and the expression of VEGF and MMP, thereby inhibiting the invasion and migration potential of cancer cells[1].
p38-α MAPK-IN-1 is an inhibitor of MAPK14 (p38-α), with IC50 of 2300 nM in EFC displacement assay, and 5500 nM in HTRF assay.
Doramapimod (BIRB 796) is a highly potent p38 MAPK inhibitor with an IC50 of 4 nM. It also inhibits B-Raf with an IC50 of 83 nM.
BMS-582949 hydrochloride is a novel highly selective p38α MAPK inhibitor, inhibits p38α with IC50 of 13 nM. IC50 value: 13 nM[1]Target: p38αin vitro: BMS-582949 does not significantly inhibit cytochrome P450 isozymes 1A2, 2C9, 2C19, and 2D6 with IC50values >40 μM. It is a weak inhibitor of CYP3A4, with an IC50 value ranging from 18 to 40 μM based in multiple tests. BMS-582949 displays >2000-fold selectivity for p38α over a diverse panel of 57 kinases that include serine kinases, nonreceptor tyrosine kinases, receptor tyrosine kinases, and the p38γ and δ isoforms. BMS-582949 is also 450-fold selective over Jnk2, a MAP kinase involved in inflammation, and 190-fold selective over Raf[1].BMS-582949 is a novel highly selective p38α MAPK inhibitor [2]. in vivo: The mouse clearance rate for BMS-582949 is 4.4 mL/min/kg. And, at an oral dose of 10 mg/kg, the mouse AUC0?8 h for BMS-582949 is 75.5 μM·h. BMS-582949 exhibited oral bioavailability values of 90% and 60% in mice and rats, respectively[1].
L-threo-Sphingosine is a potent MAPK inhibitor. L-threo-Sphingosine induces apoptosis and clear DNA fragmentation. L-threo-Sphingosine shows anticancer effect[1].
SB 239063 is a potent and selective p38 MAPK inhibitor (IC50 = 44 nM for p38α). SB 239063 displays > 220-fold selectivity over ERK, JNK1 and other kinases; ~ 3-fold more selective than SB 203580. IC50 value: 44 nM ( p38α)Target: p38 MAPKSB 239063 reduces inflammatory cytokine production and is neuroprotective following oral administration in vivo.
p38 MAPK-IN-4 (compound 6) is a p38 MAPK inhibitor with an 50 of 35 nM[1].
SB 203580 is a widely used p38 MAPK inhibitor with an IC50 of 0.3-0.5 μM. It shows more than 100-fold selectivity over PKB, LCK, and GSK-3β.
Licochalcone E, a flavonoid compound isolated from Glycyrrhiza inflate, inhibits NF-κB and AP-1 transcriptional activity through the inhibition of AKT and MAPK activation[1].
R1487 (Hydrochloride) is highly potent and highly selective inhibitors of p38α.target: p38α;R1487 (Hydrochloride) potently inhibits cytokine production in a variety of in vitro and in vivo models.[1]R1487 (Hydrochloride) inhibits production of TNFR by human monocytic cells (THP-1) and inhibits production of IL-1β in human whole blood (HWB) induced by LPS.[1]
Isoliquiritin apioside, a component isolated from Glycyrrhizae radix rhizome, significantly decreases PMA-induced increases in MMP9 activities and suppresses PMA-induced activation of MAPK and NF-κB. Isoliquiritin apioside auppresseses invasiveness and angiogenesis of cancer cells and endothelial cells[1].
JNJ-49095397 (RV-568) is a specific narrow-spectrum kinase inhibitor that inhibits a selected set of kinases involved in COPD inflammation with IC50 of 5, 40 and 52 nM for p38α, p38γ and HCK, respectively; shows potent anti-inflammatory effects in monocytes and macrophages, demonstrates synergistic interaction in poly I:C-stimulated BEAS-2B cells and in the cigarette smoke model combined with corticosteroid. COPD Phase 2 Clinical
ASK1-IN-1 is a CNS-penetrant ASK1 (apoptosis signal-regulating kinase 1) inhibitor, with good potency (cell IC50=138 nM; Biochemical IC50=21 nM)[1].
MPAK13-IN-1 is a MAPK13 (p38δ) inhibitor, with an IC50 of 620 nM.
3′-O-Demethyl-4′-N-demethyl-4′-N-acetyl-4′-epi-staurosporine (Compound 7) is an inhibitor of protein kinases, with IC50s of 0.092, 0.26, 0.77 μM for PKC-α, ROCK, ASK1. 3′-O-Demethyl-4′-N-demethyl-4′-N-acetyl-4′-epi-staurosporine shows potent cytotoxicity against PC-3 cancer cells with an IC50 value of 0.16 μM[1].
LL-Z1640-4 is a potent p38/JNK signaling inhibitor. LL-Z1640-4 significantly diminishes p38 and JNK activation in HCC cells transfected with MLK4 siRNA. LL-Z1640-4 markedly attenuates ROS production induced by MLK4 knockdown. LL-Z1640-4 significantly reduces the apoptotic cells in HCC cells transfected with siMLK4[1][2].