Synthesis and Biological Evaluation of Novel Gigantol Derivatives as Potential Agents in Prevention of Diabetic Cataract
作者:Jie Wu、Chuanjun Lu、Xue Li、Hua Fang、Wencheng Wan、Qiaohong Yang、Xiaosheng Sun、Meiling Wang、Xiaohong Hu、C.-Y. Oliver Chen、Xiaoyong Wei
DOI:10.1371/journal.pone.0141092
日期:——
As a continuation of our efforts directed towards the development of natural anti-diabetic cataract agents, gigantol was isolated from Herba dendrobii and was found to inhibit both aldose reductase (AR) and inducible nitric oxide synthase (iNOS) activity, which play a significant role in the development and progression of diabetic cataracts. To improve its bioefficacy and facilitate use as a therapeutic agent, gigantol (compound 14f) and a series of novel analogs were designed and synthesized. Analogs were formulated to have different substituents on the phenyl ring (compounds 4, 5, 8, 14a-e), substitute the phenyl ring with a larger steric hindrance ring (compounds 10, 17c) or modify the carbon chain (compounds 17a, 17b, 21, 23, 25). All of the analogs were tested for their effect on AR and iNOS activities and on D-galactose-induced apoptosis in cultured human lens epithelial cells. Compounds 5, 10, 14a, 14b, 14d, 14e, 14f, 17b, 17c, 23, and 25 inhibited AR activity, with IC50 values ranging from 5.02 to 288.8 μM. Compounds 5, 10, 14b, and 14f inhibited iNOS activity with IC50 ranging from 432.6 to 1188.7 μM. Compounds 5, 8, 10, 14b, 14f, and 17c protected the cells from D-galactose induced apoptosis with viability ranging from 55.2 to 76.26%. Of gigantol and its analogs, compound 10 showed the greatest bioefficacy and is warranted to be developed as a therapeutic agent for diabetic cataracts.
作为我们致力于开发天然抗糖尿病性白内障药物的延续,从石斛中分离出巨花素,并发现它能抑制醛糖还原酶(AR)和诱导型一氧化氮合酶(iNOS)的活性,这两种酶在糖尿病性白内障的发展和进展中起着重要作用。为了提高其生物效力和便于作为治疗剂使用,设计并合成了巨花素(化合物14f)及一系列新衍生物。这些衍生物在苯环上有不同的取代基(化合物4、5、8、14a-e),用具有更大立体障碍的环替代苯环(化合物10、17c),或修改碳链(化合物17a、17b、21、23、25)。所有衍生物在体外对AR和iNOS的活性以及在D-半乳糖诱导的人晶状体上皮细胞凋亡中的作用进行了测试。化合物5、10、14a、14b、14d、14e、14f、17b、17c、23和25抑制了AR的活性,IC50值范围为5.02至288.8 μM。化合物5、10、14b和14f抑制了iNOS的活性,IC50范围为432.6至1188.7 μM。化合物5、8、10、14b、14f和17c保护细胞免受D-半乳糖诱导的凋亡,存活率范围为55.2至76.26%。在巨花素及其衍生物中,化合物10显示出最大的生物效力,值得开发为糖尿病性白内障的治疗剂。