Tyrphostin A1
(Synonyms: (4-甲氧基苄烯)丙二腈,Tyrphostin 1; AG9) 目录号 : GC37850
Tyrphostin A1(AG9)能抑制巨噬细胞培养中CD40L刺激的IL-12产生和抗原诱导的Th1细胞生成。
Cas No.:2826-26-8
Sample solution is provided at 25 µL, 10mM.
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Quality Control & SDS
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- Purity: >99.50%
- COA (Certificate Of Analysis)
- SDS (Safety Data Sheet)
- Datasheet
Tyrphostin A1(AG9) inhibits CD40L-stimulated IL-12 production in macrophage cultures and antigen-induced generation of Th1 cells.IC50 value: Target: IL-12 production inhibitorAddition of increasing concentration of A1 resulted in a dose dependent decrease of IL-12 p40, with maximal inhibition (62.5%) occurring at a dose of 10 μM. tyrphostin A1 blocks CD40L-induced translocation of NF-κB to the nucleus, and reduces the activation of IL-12 p40 gene. In vivo therapy with A1 leads to decrease in generation of myelin basic protein (MBP) specific encephalitogenic T cells. In addition, treatment of SJL/J mice with A1 results in attenuation of experimental allergic encephalomyelitis (EAE) [1]. Tyrphostin A1 is a much weaker inhibitor of TK than other tyrphostins (IC50>1250 μM for epidermal growth factor receptor (EGFR) kinase), and therefore often used to differentiate TK-mediated effects of tyrphostins from other non-specific effects [2].
[1]. Du C, et al. Inhibition of CD40 signaling pathway by tyrphostin A1 reduces secretion of IL-12 in macrophage, Th1 cell development and experimental allergic encephalomyelitis in SJL/J mice. J Neuroimmunol. 2001 Mar 1;114(1-2):69-79. [2]. Ogura T, et al. Activation of background membrane conductance by the tyrosine kinase inhibitor tyrphostin A23 and its inactive analog tyrphostin A1 in guinea pig ventricular myocytes. Jpn J Pharmacol. 2001 Nov;87(3):235-9.
| Cas No. | 2826-26-8 | SDF | |
| 别名 | (4-甲氧基苄烯)丙二腈,Tyrphostin 1; AG9 | ||
| Canonical SMILES | N#C/C(C#N)=C\C1=CC=C(OC)C=C1 | ||
| 分子式 | C11H8N2O | 分子量 | 184.19 |
| 溶解度 | DMSO: ≥ 100 mg/mL (542.92 mM) | 储存条件 | Store at -20°C |
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1 mg | 5 mg | 10 mg |
| 1 mM | 5.4292 mL | 27.1459 mL | 54.2918 mL |
| 5 mM | 1.0858 mL | 5.4292 mL | 10.8584 mL |
| 10 mM | 0.5429 mL | 2.7146 mL | 5.4292 mL |
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Activation of background membrane conductance by the tyrosine kinase inhibitor tyrphostin A23 and its inactive analog Tyrphostin A1 in guinea pig ventricular myocytes
Jpn J Pharmacol 2001 Nov;87(3):235-9.PMID:11885974DOI:10.1254/jjp.87.235.
ABSTRACT-The effects of the tyrosine kinase (TK) inhibitor tyrphostin A23 and its inactive analog tyrphostin Al on background membrane conductance were investigated in guinea pig ventricular myocytes. TK-inhibiting A23 reversibly increased membrane conductance under conditions designed to minimize Na+, Ca2+, K+, and Na+-K+ pump currents. Similar stimulatory action was obtained with TK-inactive Al. The tyrphostin-induced current was inhibited by omitting external Na+ or Ca+, suppressed by chelating internal Ca2+, blocked by external Cd2+ and Ni2+, and insensitive to changes in internal Cl- concentration. We conclude that tyrphostins have a direct, TK-independent action that increases membrane conductance probably by stimulating Na+-Ca2+ exchange.
Inhibition of CD40 signaling pathway by Tyrphostin A1 reduces secretion of IL-12 in macrophage, Th1 cell development and experimental allergic encephalomyelitis in SJL/J mice
J Neuroimmunol 2001 Mar 1;114(1-2):69-79.PMID:11240017DOI:10.1016/s0165-5728(00)00434-3.
Activation of antigen presenting cells through the interaction of CD40 with its ligand is a critical co-stimulatory signal for IL-12 production and Th1 differentiation. Tyrphostins are organic molecules that inhibit the phosphorylation of protein tyrosine kinases. We show that Tyrphostin A1 inhibits CD40L-stimulated IL-12 production in macrophage cultures and antigen-induced generation of Th1 cells. Our data also show that Tyrphostin A1 blocks CD40L-induced translocation of NF-kappaB to the nucleus, and reduces the activation of IL-12 p40 gene. In vivo therapy with A1 leads to decrease in generation of myelin basic protein (MBP) specific encephalitogenic T cells. In addition, treatment of SJL/J mice with A1 results in attenuation of experimental allergic encephalomyelitis (EAE).
Tyrphostin B42 inhibits IL-12-induced tyrosine phosphorylation and activation of Janus kinase-2 and prevents experimental allergic encephalomyelitis
J Immunol 1999 May 15;162(10):6255-62.PMID:10229872doi
IL-12 is a macrophage-derived cytokine that induces proliferation, cytokine production, and cytotoxic activity of T and NK cells. Signaling through its receptor, IL-12 induces these cellular responses by tyrosine phosphorylation and activation of Janus kinase-2 (Jak-2), Tyk-2, Stat3, and Stat4. We have used tyrphostin B42 (AG490), a Jak-2 inhibitor, to determine the role of Jak-2 kinase in IL-12 signaling and IL-12-induced T cell functions. Treatment of activated T cells with tyrphostin B42 inhibited the IL-12-induced tyrosine phosphorylation and activation of Jak-2 without affecting Tyk-2 kinase. In contrast, treatment with Tyrphostin A1 inhibited the tyrosine phosphorylation of Tyk-2 but not that of Jak-2 kinase. Inhibition of either Jak-2 or Tyk-2 leads to a decrease in the IL-12-induced tyrosine phosphorylation of Stat3, but not of Stat4, protein. While inhibition of Jak-2 lead to programmed cell death, the inhibition of Jak-2 or Tyk-2 resulted a decrease in IFN-gamma production. We have further tested the in vivo effects of tyrphostin B42 in experimental allergic encephalomyelitis, a Th1 cell-mediated autoimmune disease. In vivo treatment with tyrphostin B42 decreased the proliferation and IFN-gamma production of neural Ag-specific T cells. Treatment of mice with tyrphostin B42 also reduced the incidence and severity of active and passive EAE. These results suggest that tyrphostin B42 prevents EAE by inhibiting IL-12 signaling and IL-12-mediated Th1 differentiation in vivo.
Potentiation of adenosine A1 receptor-mediated inositol phospholipid hydrolysis by tyrosine kinase inhibitors in CHO cells
Br J Pharmacol 1998 Nov;125(5):1049-57.PMID:9846644DOI:10.1038/sj.bjp.0702170.
1. The effect of protein tyrosine kinase inhibitors on human adenosine A1 receptor-mediated [3H]-inositol phosphate ([3H]-IP) accumulation has been studied in transfected Chinese hamster ovary cells (CHO-A1) cells. 2. In agreement with our previous studies the selective adenosine A1 receptor agonist N6-cyclopentyladenosine (CPA) stimulated the accumulation of [3H]-IPs in CHO-A1 cells. Pre-treatment with the broad spectrum tyrosine kinase inhibitor genistein (100 microM; 30 min) potentiated the responses elicited by 1 microM (199+/-17% of control CPA response) and 10 microM CPA (234+/-15%). Similarly, tyrphostin A47 (100 microM) potentiated the accumulation of [3H]-IPs elicited by 1 microM CPA (280+/-32%). 3. Genistein (EC50 = 13.7+/-1.2 microM) and tyrphostin A47 (EC50 = 10.4+/-3.9 microM) potentiated the [3H]-IP response to 1 microM CPA in a concentration-dependent manner. 4. Pre-incubation with the inactive analogues of genistein and tyrphostin A47, daidzein (100 microM; 30 min) and Tyrphostin A1 (100 microM; 30 min), respectively, had no significant effect on the accumulation of [3H]-IPs elicited by 1 microM CPA. 5. Genistein (100 microM) had no significant effect on the accumulation of [3H]-IPs produced by the endogenous thrombin receptor (1 u ml(-1); 100+/-10% of control response). In contrast, tyrphostin A47 produced a small augmentation of the thrombin [3H]-IP response (148+/-13%). 6. Genistein (100 microM) had no effect on the [3H]-IP response produced by activation of the endogenous Gq-protein coupled CCK(A) receptor with the sulphated C-terminal octapeptide of cholecystokinin (1 microM CCK-8; 96+/-6% of control). In contrast, tyrphostin A47 (100 microM) caused a small but significant increase in the response to 1 microM CCK-8 (113+/-3% of control). 7. The phosphatidylinositol 3-kinase inhibitor LY 294002 (30 microM) and the MAP kinase kinase inhibitor PD 98059 (50 microM) had no significant effect on the [3H]-IP responses produced by 1 microM CPA and 1 microM CCK-8. 8. These observations suggest that a tyrosine kinase-dependent pathway may be involved in the regulation of human adenosine A1 receptor mediated [3H]-IP responses in CHO-A1 cells.
Oxidant stress enhances adenylyl cyclase activation
Circ Res 1995 Oct;77(4):710-7.PMID:7554117DOI:10.1161/01.res.77.4.710.
The generation of oxygen-derived free radicals has been implicated in the disordered vascular regulation of inflammation and reperfusion. In the vasculature, oxygen-derived free radicals are vasodilatory. The mechanisms underlying this effect remain unclear. To examine the cellular processes involved, we studied the effects of hydrogen peroxide (H2O2) on adenylyl cyclase activity in A10 cells, a murine vascular smooth muscle cell line. Pretreatment with H2O2 caused a dose-dependent enhancement of forskolin-stimulated adenylyl cyclase activity (ED50, 44 mumol/L to a maximum of 166% of control activity; n = 4). This enhancement was attenuated by iron chelation with deferoxamine and by the intracellular hydroxyl scavenger dimethylthiourea and mimicked by preincubation with purine/xanthine oxidase either alone or in the presence of superoxide dismutase. The effects of H2O2 were completely blocked by the tyrosine kinase inhibitors genistein and tyrphostin A9 but not by its inactive analogue Tyrphostin A1 (H2O2 alone, 149 +/- 13%; H2O2 + tyrphostin A9, 100 +/- 9%; H2O2 + Tyrphostin A1, 171 +/- 21%; n = 4). H2O2 comparably enhanced adenylyl cyclase activity stimulated by isoproterenol (166 +/- 17% of control, n = 5) and sodium fluoride (177 +/- 18% of control, n = 5). Thus oxygen-derived free radicals enhance adenylyl cyclase activation, probably via tyrosine kinase-mediated effects on the catalytic subunit of adenylyl cyclase. Sensitization of adenylyl cyclase activation may be an important mechanism by which free radicals modulate hormone-mediated vasodilation.