Project 2: Impact of immune-based intervention on viral rebound in orally SHIV infected infant monkeys

项目 2：免疫干预对经口感染 SHIV 的幼猴病毒反弹的影响

• 批准号: 10360198
• 负责人: Genevieve Giny Fouda Amou ou
• 金额: $ 36.31万
• 依托单位: WEILL MEDICAL COLL OF CORNELL UNIV
• 依托单位国家: 美国
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-07-24 至 2022-06-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/10360198
• 关键词: Project; Impact; immune; based; intervention

ABSTRACT – Project 2 (Leader: Dr. Genevieve Fouda, Duke University) More than 1.8 million children world-wide live with HIV, and every year more than 150,000 new pediatric HIV infections occur. Current standard of care commits HIV-infected children to lifelong, daily antiretroviral treatment (ART). However, ART does not cure HIV due to the persistence of virus reservoirs that re-establish infection following treatment interruption. Therapeutic interventions that lower the size of the virus reservoir could delay virus rebound when ART is interrupted. Such reservoir reduction can be achieved by very early ART initiation, but this is not practical for the roughly half of pediatric HIV cases stemming from postnatal infection via breast milk HIV transmission because their diagnosis is delayed. Thus, postnatally infected children would benefit greatly from development of adjunct therapies, including immune-based strategies. Indeed, studies have indicated that antibody passive immunization and therapeutic vaccination can impact virus reservoirs, but their relevance and effect in the maturating infant immune system remains unknown. A first step toward development of immunotherapeutic interventions for postnatally infected infants thus will require identifying the immune mechanisms associated with virus control after breast milk transmission. Thus the objective of this Project is to identify immune correlates of virus rebound in the setting of breast milk transmission. Our central hypothesis is that enhancement of specific antiviral immune responses in ART- treated, simian-human immunodeficiency virus (SHIV)-infected infant rhesus macaques (RMs), either through antibody passive immunization or through vaccination, will reduce the virus reservoir and delay virus rebound after treatment interruption. We propose the following aims: 1) Assess kinetics of virus-specific immune responses in ART treated SHIV-infected infant RMs; 2) Define the impact of adjunct therapy with polyclonal polyfunctional antiviral antibodies on virus rebound in an infant RM model of breast milk transmission and ART; and 3) Evaluate the impact of enhancing T cell responses through vaccination on virus rebound in SHIV- infected ART-treated infant RMs. This Project will interact with the proposed Program's other Project and utilize the services of the Administrative and Statistical Core, the Nonhuman Primate Core, and Virology Core. This Project will identify immune correlates associated with reservoir clearance and/or delay in virus rebound in a highly relevant animal model of postnatal transmission and thereby guide design of pediatric-specific immune- based interventions towards an HIV functional cure.

摘要-项目2（负责人：杜克大学Genevieve Fouda博士） 全世界有180多万儿童感染艾滋病毒，每年有15万多名儿童感染艾滋病毒。 发生感染。目前的护理标准要求感染艾滋病毒的儿童终身每天接受抗逆转录病毒治疗 治疗（ART）。然而，ART并不能治愈艾滋病毒，因为病毒库的持续存在， 治疗中断后感染。降低病毒库大小的治疗干预措施 可以延迟ART中断时病毒反弹。这样的储层减少可以通过非常早的 开始抗逆转录病毒治疗，但这对于大约一半的儿童艾滋病毒病例来说是不切实际的， 通过母乳感染艾滋病毒传播，因为他们的诊断被推迟。因此，出生后感染 儿童将大大受益于辅助疗法的发展，包括基于免疫的战略。 事实上，研究表明，抗体被动免疫和治疗性疫苗接种可以影响 病毒库，但其相关性和成熟的婴儿免疫系统的影响仍然未知。一 因此，对出生后感染婴儿进行免疫干预的第一步将 需要确定与母乳传播后病毒控制相关的免疫机制。因此 该项目的目标是确定母乳中病毒反弹的免疫相关性 传输我们的中心假设是ART中特异性抗病毒免疫应答的增强- 治疗，猴人免疫缺陷病毒（SHIV）感染的婴儿恒河猴（RM），无论是通过 抗体被动免疫或通过疫苗接种，将减少病毒储库，延缓病毒反弹 治疗中断后。我们提出以下目的：1）评估病毒特异性免疫的动力学 ART治疗的SHIV感染婴儿RM的反应; 2）确定多克隆抗体辅助治疗的影响 多功能抗病毒抗体对母乳传播和ART的婴儿RM模型中病毒反弹的影响; 和3）评估通过疫苗接种增强T细胞应答对SHIV-1中病毒反弹的影响。 感染ART治疗的婴儿RM。该项目将与拟议计划的其他项目互动，并利用 行政和统计核心、非人类灵长类核心和病毒学核心的服务。这 该项目将确定与水库清除和/或延迟病毒反弹相关的免疫相关性， 高度相关产后传播动物模型，从而指导儿科特异性免疫- 为艾滋病毒功能性治愈提供基础干预措施。