HALOFUGINONE LACTATE is a halogenated derivative of febrifugine, a natural quinazolinone-containing compound found in the Chinese herb D. febrifuga.Halofuginone inhibits prolyl-tRNA synthetase in an ATP-dependent manner with a Ki of 18.3 nM. Halofuginone is a specific inhibitor of type-I collagen synthesis and attenuates osteoarthritis (OA) by inhibition of TGF-β activity

Biotin-PEG3-amide-C2-CO-Halofuginone is a derivative of halofuginone applicable in cancer research [1].

Halofuginone specifically inhibits collagen type I gene expression and matrix metalloproteinase 2 (MMP-2) gene expression, which may result in the suppression of angiogenesis, tumor stromal cell development, and tumor cell growth. Halofuginone Hydrobromide is the hydrobromide salt of halofuginone, a semisynthetic quinazolinone alkaloid anticoccidial derived from the plant Dichroa febrifuga, with antifibrotic and potential antineoplastic activities. These effects appear to be due to halofuginone-mediated inhibition of the collagen type I and MMP-2 promoters. Collagen type I and MMP-2 play important roles in fibroproliferative diseases.

Halofuginone hydrobromide (RU-19110), a derivative of Febrifugine, functions as a competitive inhibitor of prolyl-tRNA synthetase, displaying a K_i value of 18.3 nM. This compound effectively inhibits type-I collagen synthesis, providing therapeutic benefits in osteoarthritis (OA) by impeding TGF-β signaling. Additionally, it serves as a potent pulmonary vasodilator, mainly through the activation of Kv channels and the inhibition of various calcium channels including voltage-gated, receptor-operated, and store-operated ones. Beyond its vascular effects, Halofuginone hydrobromide exhibits a broad spectrum of biological activities, including anti-malarial, anti-inflammatory, anti-cancer, and anti-fibrotic properties, supported by multiple studies [1] [2] [3] [4] [5].

Halofuginone (RU-19110), the competitive inhibitor of prolyl-tRNA synthetase(Ki=18.3 nM), could also down-regulate Smad3 and blocked TGF-β signaling at 10 ng/ml in the mammal.