Development of three-component conjugates: to get nano-globes with porous surfaces, high in vivo anti-osteoporosis activity and minimal side effects
作者:Guifeng Kang、Yuji Wang、Jiawang Liu、Jianhui Wu、Ming Zhao、Guochun Li、Ning Li、Li Peng、Xiaoyi Zhang、Li Li、Nathan Mair、Shiqi Peng
DOI:10.1039/c2jm34370c
日期:——
Three novel three-component conjugates of a succinyl spacer, a pharmacophore of 17β-amino-11α-hydroxyl-androst-1,4-diene-3-one, and a targeting sequence of RGD-tetrapeptide (peptide Arg-Gly-Asp-AA) were designed, synthesized, and evaluated. This paper presents evidence that inserting a succinyl functional group into the pharmacophore and the targeting sequence improves the oral anti-osteoporosis activities in mouse glucocorticoid model of secondary osteoporosis, which were reflected by dry weight, ash weight, Ca2+ and bone mineral content of the femur of examined mice. These novel conjugates have no side effects on estrogen, and form nano-globes with a porous surface. This paper emphasizes that the hydrogen bond between the carbonyl group of the succinyl group and the carboxylic group of the C-terminal amino acid residue of RGD-tetrapeptides is the key to forming pores on the surface of the nano-globes of these novel conjugates.
设计、合成并评价了三种新颖的三元复合物,它们由琥珀酰间隔基、17β-氨基-11α-羟基-雄甾-1,4-二烯-3-酮药效团和RGD-四肽(肽Arg-Gly-Asp-AA)靶向序列组成。本文提供了证据,表明在药效团和靶向序列中插入琥珀酰功能团,能提高在小鼠糖皮质激素诱导的继发性骨质疏松症模型中的口服抗骨质疏松活性,表现为测定小鼠股骨的干重、灰重、Ca2+和骨矿物质含量。这些新颖的复合物对雌激素无副作用,并形成具有多孔表面的纳米球。本文强调,琥珀酰基团的羰基与RGD-四肽C端氨基酸残基的羧基之间的氢键是这些新颖复合物纳米球表面形成孔隙的关键。