Vatalanib decrease the positive interaction of VEGF receptor-2 and P2X2/3 receptor in chronic constriction injury rats was written by Liu, Shuangmei;Xu, Changshui;Li, Guilin;Liu, Han;Xie, Jinyan;Tu, Guihua;Peng, Haiying;Qiu, Shuyi;Liang, Shangdong. And the article was included in Neurochemistry International in 2012.Computed Properties of C20H15ClN4 This article mentions the following:
Neuropathic pain can arise from a lesion affecting the peripheral nervous system. Selective P2X3 and P2X2/3 receptors’ antagonists effectively reduce neuropathic pain. VEGF inhibitors are effective for pain relief. The present study investigated the effects of Vatalanib (VEGF receptor-2 (VEGFR-2) inhibitor) on the neuropathic pain to address the interaction of VEGFR-2 and P2X2/3 receptor in dorsal root ganglia of chronic constriction injury (CCI) rats. Neuropathic pain symptoms following CCI are similar to most peripheral lesions as assessed by the Neuropathic Pain Symptom Inventory. Sprague-Dawley rats were randomly divided into sham group, CCI group and CCI rats treated with Vatalanib group. Mech. withdrawal threshold and thermal withdrawal latency were measured. Co-expression of VEGFR-2 and P2X2 or P2X3 in L4-6 dorsal root ganglia (DRG) was detected by double-label immunofluorescence. The modulation effect of VEGF on P2X2/3 receptor agonist-activated currents in freshly isolated DRG neurons of rats both of sham and CCI rats was recorded by whole-cell patch-clamp technique. The mech. withdrawal threshold (MWT) and thermal withdrawal latency (TWL) in CCI group were lower than those in sham group (p < 0.05). MWT and TWL in CCI rats treated with Vatalanib group were increased compared with those in CCI group (p < 0.05). VEGFR-2 and P2X2 or P2X3 receptors were co-expressed in the cytoplasm and surface membranes of DRG. The co-expression of VEGFR-2 and P2X2 or P2X3 receptor in CCI group exhibited more intense staining than those in sham group and CCI rats treated with Vatalanib group, resp. VEGF enhanced the amplitude of ATP and α,β-meATP -activated currents of both sham and CCI rats. Increment effects of VEGF on ATP and α,β-meATP -activated currents in CCI rats were higher than those in sham rats. Both ATP (100 μM) and α,β-meATP (10 μM)- activated currents enhanced by VEGF (1 nM) were significantly blocked by Vatalanib (1 μM, an inhibitor of VEGF receptors). The stain values of VEGFR-2, P2X2 and P2X3 protein expression in L4/5 DRG of CCI treated with Vatalanib group were significantly decreased compared with those in CCI group (p < 0.01). Vatalanib can alleviate chronic neuropathic pain by decreasing the activation of VEGF on VEGFR-2 and the pos. interaction between the up-regulated VEGFR-2 and P2X2/3 receptors in the neuropathic pain signaling. In the experiment, the researchers used many compounds, for example, N-(4-Chlorophenyl)-4-(pyridin-4-ylmethyl)phthalazin-1-amine (cas: 212141-54-3Computed Properties of C20H15ClN4).
N-(4-Chlorophenyl)-4-(pyridin-4-ylmethyl)phthalazin-1-amine (cas: 212141-54-3) belongs to phthalazine derivatives. Phthalazine is isomeric with other naphthyridines including quinoxaline, cinnoline and quinazoline. Also, Phthalazinesare crucial precursors in the synthesis of many compounds with interesting pharmacological properties like phosphodiesterase inhibitors and blood platelet aggregation inhibitors.Computed Properties of C20H15ClN4
Referemce:
Phthalazine – Wikipedia,
Phthalazine | C8H6N2 – PubChem