bestar 发表于 2015-7-9 16:57:21

Science:科学家有望开发出强效的HIV疫苗

http://www-bioon.qiniudn.com/tm/UploadFiles/201507/2015070420002450.png近日,一篇发表在国际杂志Science上的研究论文中,来自贝丝-以色列-迪肯尼斯医疗中心 ( Beth Israel Deaconess Medical Center )的研究人员通过研究开发出了一种新型的HIV-1疫苗方案,其包含了一种由纯化的包膜蛋白增强的病毒载体,这种新型疫苗可以为一半已接种的非人类灵长类动物提供完全的保护作用,来帮助抵御猴免疫缺陷病毒(SIV)的六重攻击,SIV是一种和HIV类似的可以感染非人类灵长类动物的病毒。基于临床前的研究数据,这种新型疫苗策略的HIV-1版本目前正在进行1/2a阶段的国际临床研究;研究者Dan H. Barouch说道,此前我们研究发现,基于腺病毒载体的HIV-1候选疫苗可以针对SIV提供部分保护作用,而本文中研究者进行了两项最新研究,他们评估了由纯化的包膜蛋白增强的26型腺病毒(Ad26)载体疫苗给机体提供的保护效力。相关研究结果表明,病毒载体的启动外加包膜蛋白的增强作用会给一半已接种的动物提供完全的保护作用,而这明显地改善了此前的研究结果;此外这种新型疫苗还会增加保护机体的程度以及抗体反应的多功能性,而且在病毒载体Ad26启动后包膜蛋白也会发挥其潜在的功能。目前控制全球HIV的流行需要新型的工具、大胆的策略和多国研究者的通力合作,后期研究者将同更多的HIV领域专家合作来开发保护性的HIV疫苗,研究者希望尽快将这种新型疫苗投入到人类临床试验中,从而为HIV疫苗的研究提供更多的研究数据和创新性成果。(生物谷Bioon.com)
http://www-bioon.qiniudn.com/tm/UploadFiles/201507/2015070419565091.pngdoi:10.1126/science.aab3886
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Protective efficacy of adenovirus-protein vaccines against SIV challenges in rhesus monkeysDan H. Barouch1,2,*, Galit Alter2, Thomas Broge2, Caitlyn Linde2, Margaret E. Ackerman3, Eric P. Brown3, Erica N. Borducchi1, Kaitlin M. Smith1, Joseph P. Nkolola1, Jinyan Liu1, Jennifer Shields1, Lily Parenteau1, James B. Whitney1, Peter Abbink1, David M. Ng’ang’a1, Michael S. Seaman1, Christy L. Lavine1, James R. Perry1, Wenjun Li4, Arnaud D. Colantonio5, Mark G. Lewis6, Bing Chen7, Holger Wenschuh8, Ulf Reimer8, Michael Piatak9,†, Jeffrey D. Lifson9, Scott A. Handley10, Herbert W. Virgin10, Marguerite Koutsoukos11, Clarisse Lorin11, Gerald Voss11, Mo Weijtens12, Maria G. Pau12, Hanneke Schuitemaker12
Preclinical studies of viral vector–based HIV-1 vaccine candidates have previously shown partial protection against neutralization-resistant virus challenges in rhesus monkeys. In this study, we evaluated the protective efficacy of adenovirus serotype 26 (Ad26) vector priming followed by purified envelope (Env) glycoprotein boosting. Rhesus monkeys primed with Ad26 vectors expressing SIVsmE543 Env, Gag, and Pol and boosted with AS01B-adjuvanted SIVmac32H Env gp140 demonstrated complete protection in 50% of vaccinated animals against a series of repeated, heterologous, intrarectal SIVmac251 challenges that infected all controls. Protective efficacy correlated with the functionality of Env-specific antibody responses. Comparable protection was also observed with a similar Ad/Env vaccine against repeated, heterologous, intrarectal SHIV-SF162P3 challenges. These data demonstrate robust protection by Ad/Env vaccines against acquisition of neutralization-resistant virus challenges in rhesus monkeys.



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