尽管从非线虫Dichroa febrifuga植物的根中分离出的生物碱(Febrifugine(1)和isofebrifugine(2))对恶性疟原虫表现出强大的抗疟活性,但诸如催吐作用等强烈的副作用已使它们无法在临床上用于疟疾。但是,它们的抗疟药功效使其成为吸引人的物质,成为开发新型化学治疗抗疟药的先导。因此,我们已经评估了非溴夫定(1)和异氟苯丙氨酸(2)的类似物的体外抗疟活性。还获得了分别由1和2与丙酮缩合的Df-1(3)和Df-2(4)衍生的类似物的活性。发现1的3'-酮衍生物(7,EC(50)= 2.0 x 10(-8)M)具有潜在的抗疟疾活性,并且在体外对恶性疟原虫具有高选择性。还原产物(8,EC(50)= 2.0 x 10(-8)M)在C-2'及其环状衍生物9和10(EC(50)= 3.7 x 10(- 9)和8.6 x 10(-9)M)被发现具有很强的活性和选择性。另外,发
METHODS OF TREATMENT OF BONE DEGENERATIVE DISEASES
申请人:Teitelbaum Steven L.
公开号:US20110311519A1
公开(公告)日:2011-12-22
Methods of reducing bone loss and treating degenerative bone diseases such as osteoporosis are disclosed. The methods comprise administration of an agent that inhibits signaling through the IL-17 pathway, such as an antibody or a quinazoline analogue such as halofuginone.
US8357692B2
申请人:——
公开号:US8357692B2
公开(公告)日:2013-01-22
Potent Antimalarial Febrifugine Analogues against the <i>Plasmodium</i> Malaria Parasite
Although febrifugine (1) and isofebrifugine (2), alkaloids isolated from roots of the Dichroa febrifuga plant, show powerful antimalarial activity against Plasmodium falciparum, strong side effects such as the emetic effect have precluded their clinical use against malaria. However, their antimalarial potency makes them attractive substances as leads for developing new types of chemotherapeutic antimalarial
尽管从非线虫Dichroa febrifuga植物的根中分离出的生物碱(Febrifugine(1)和isofebrifugine(2))对恶性疟原虫表现出强大的抗疟活性,但诸如催吐作用等强烈的副作用已使它们无法在临床上用于疟疾。但是,它们的抗疟药功效使其成为吸引人的物质,成为开发新型化学治疗抗疟药的先导。因此,我们已经评估了非溴夫定(1)和异氟苯丙氨酸(2)的类似物的体外抗疟活性。还获得了分别由1和2与丙酮缩合的Df-1(3)和Df-2(4)衍生的类似物的活性。发现1的3'-酮衍生物(7,EC(50)= 2.0 x 10(-8)M)具有潜在的抗疟疾活性,并且在体外对恶性疟原虫具有高选择性。还原产物(8,EC(50)= 2.0 x 10(-8)M)在C-2'及其环状衍生物9和10(EC(50)= 3.7 x 10(- 9)和8.6 x 10(-9)M)被发现具有很强的活性和选择性。另外,发
New Type of Febrifugine Analogues, Bearing a Quinolizidine Moiety, Show Potent Antimalarial Activity against <i>Plasmodium</i> Malaria Parasite
Febrifugine (1) and isofebrifugine (2), isolated from the roots of Dichroa febrifuga Lour. (Chinese name: Chang Shan), are active principles against malaria. Adducts of 1 and 2 with acetone, Df-1 (3) and Df-2 (4), respectively, were obtained using silica gel and acetone. They showed high activity against P. falciparum malaria in vitro. Compound 3 was found to be equally effective against P. berghei