To find novel nano-materials with anti-osteoporosis activity and without side effects three novel anti-osteoporosis active amphiphiles, 17β-(RGD-AA-amido)-11α-hydroxyandrost-1,4-diene-3-one (5a: AA = Ser, 5b: AA = Val, 5c: AA = Phe), were constructed by coupling the bone resorption inhibiting active RGD-peptides and anti-osteoporosis active 17β-amino-11α-hydroxyandrost-1,4-diene-3-one. In the solid state 5a, 5b and 5c exist as dispersed globes of 300 nmâ14 μm in diameter, dispersed eggs of 110 nmâ19 μm in diameter and beads of 238 nmâ22 μm in diameter, respectively. In ultrapure water 1.1 μM of 5a, 5b and 5c form nano-globes of 33â400 nm, 16â278 nm and 54â187 nm in diameter, respectively. At an oral dose of 110 nmol kgâ15aâc effectively inhibited mice from developing osteoporosis. In contrast to estradiol, 5aâc did not induce mice to develop endometrial hyperplasia and thrombus.
为了寻找具有抗骨质疏松活性且无副作用的新型纳米材料,通过结合抑制骨吸收活性的RGD
多肽和具有抗骨质疏松活性的17β-
氨基-11α-羟基雄甾-1,4-二烯-3-酮,构建了三种新型抗骨质疏松活性的两亲性分子,17β-(RGD-
AA-酰胺)-11α-羟基雄甾-1,4-二烯-3-酮(5a:
AA = Ser,5b:
AA = Val,5c:
AA = Phe)。在固态下,5a,5b和5c分别以直径为300 nm至14 μm的分散球体、直径为110 nm至19 μm的分散蛋和直径为238 nm至22 μm的珠子存在。在超纯
水中,1.1 μM的5a,5b和5c分别形成直径为33至400 nm、16至278 nm和54至187 nm的纳米球体。在口服剂量为110 nmol kg-1时,5a至5c有效地抑制了小鼠的骨质疏松发展。与
雌二醇相比,5a至5c不会导致小鼠子宫内膜增生和血栓形成。