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TG 100801

CAS No. : 867331-82-6

MCE 站：TG 100801

产品活性：TG 100801 是TG 100572的前药，通过去酯化产生TG 100572，开可用于黄斑变性的研究。TG 100572 是多靶点激酶抑制剂，抑制受体酪氨酸激酶 (receptor tyrosine kinases) 和Src激酶 (Src kinases); 对VEGFR1，VEGFR2，FGFR1，FGFR2，PDGFRβ，Fgr，Fyn，Hck，Lck，Lyn，Src，Yes 的 IC₅₀ 值分别为2，7，2，16，13，5，0.5，6，0.1，0.4，1，0.2。

研究领域：Protein Tyrosine Kinase/RTK

作用靶点：VEGFR  |  FGFR  |  PDGFR  |  Src

In Vitro: TG 100801 is a topically administered prodrug delivered as an eye drop that is readily converted to the active TG 100572 in the eye.TG 100572 is shown to inhibit hRMVEC cell proliferation, with an IC₅₀ of 610±72 nM. TG 100801 is formed by derivitization of a phenolic moiety in TG100572 to yield an ester. It displays excellent balance of stability (physical and chemical) with hydrolysis rate. On its own, TG 100801 does not display meaningful anti-kinase activity, as the ester group blocks key interactions with kinase active sites, however exposure to esterases (abundant in mammalian tissues) rapidly liberates active TG100572.TG 100572 shows sub-nanomolar activity against the Src family as well as RTK such as VEGFR1 and R2, FGFR1 and R2, and PDGFRβ. TG 100572 inhibits vascular endothelial cell proliferation (ED₅₀=610±71 nM) and blocks VEGF-induced phosphorylation of extracellular signal-regulated kinase. TG 100572 induces apoptosis in rapidly proliferating, but not quiescent, endothelial cell cultures.

In Vivo: TG 100801 exhibits excellent ocular pharmacokinetics and poor systemic circulation and shows good efficacy in the laser induced choroidal neovascularization model. A concentration of 23.4 ?M (C_max) of TG 100572 is reached in 30 min (T_max)=0.5 h) in the choroid and the sclera. However, the levels of TG 100572 in the retina are relatively low. The half-life of TG 100572 in ocular tissues is very short; hence, the compound is administered topically minimum t.i.d. to maintain appropriate drug levels in the eye. The maximum concentration one can achieve in formulations using TG 100572 is 0.7% w/v. TG 100801 nor TG100572 are detectable in plasma following topical delivery of TG 100801, and adverse safety signals (such as weight loss) are not observed even with prolonged dosing schedules. Topical TG 100801 significantly suppresses laser-induced choroidal neovascularlization in mice, and reduces fluorescein leakage from the vasculature and retinal thickening measured by optical coherence tomography in a rat model or retinal vein occlusion.Systemic delivery of TG 100572 in a murine model of laser-induced choroidal neovascularization (CNV) causes significant suppression of CNV, but with an associated weight loss suggestive of systemic toxicity.

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