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Aggressive Antipyretics in CNS Malaria: A Randomized-Controlled Trial Assessing Antipyretic Efficacy and Parasite Clearance

中枢神经系统疟疾中的强力退热药：评估退热功效和寄生虫清除的随机对照试验

基本信息

批准号：
10179500
负责人：
GRETCHEN L. BIRBECK
金额：
$ 60.25万
依托单位：
UNIVERSITY OF ROCHESTER
依托单位国家：
美国
项目类别：
财政年份：
2017
资助国家：
美国
起止时间：
2017-09-15 至 2023-05-31
项目状态：
已结题

项目摘要

Despite ongoing eradication efforts, malaria remains a major public health challenge in Africa where annually, ~250,000 children with malaria experience a neurologic injury with subsequent neurodisability. In other central nervous system (CNS) disorders, fever is a recognized cause of worsening secondary neurologic injury and ex- tensive efforts are made to avoid hyperthermia or induce hypothermia for neuroprotection. Evidence indicates that among children with CNS malaria a higher temperature during the acute illness is a risk factor for post-in- fectious neurologic sequelae. As such, aggressive antipyretic therapy may be warranted, at least among chil- dren with complicated malaria who are at substantial risk of brain injury. Previous clinical trials conducted pri- marily in children with uncomplicated malaria and using only a single antipyretic medication have shown limited benefits in terms of fever reduction; however, no studies to date have examined malaria fever management us- ing dual therapies. Enthusiasm for aggressive fever reduction measures among clinicians caring for children with malaria has been curbed by in vitro findings that malaria parasite replication slows at higher temperatures and a single clinical trial in which peripheral parasite clearance was slower in children receiving treatment for fe- ver. However, the relationship between temperature and malaria parasite behavior is complex. Additional in vitro data suggest that at febrile temperatures uninfected red blood cells (RBCs) are more likely to adhere to infected RBCs, worsening the process of sequestration, increasing the parasite burden obstructing microvascular cere- bral blood flow, and perhaps contributing to ongoing immuno-pathogenesis in CNS malaria. In this exploratory clinical trial of aggressive antipyretic therapy, children hospitalized with CNS malaria will be randomized to usual care (acetaminophen every 6 hours for a temperature ≥ 38.5ºC) vs. prophylactic acetaminophen and ibuprofen every 6 hours for 72 hours. This proof-of-concept study will determine whether aggressive antipyretic therapy results in a lower mean maximum temperature relative to usual care. Serial quantitative levels of HRP2, a P. fal- ciparum-specific protein that facilitates estimates of whole body parasite burden and CNS parasite sequestra- tion, will also be collected to clarify the relationship between antipyretic use and in vivo parasite behavior. Find- ings from this study will determine whether a Phase III clinical trial of aggressive antipyretics for neuroprotection in pediatric CNS malaria should be undertaken. This study will take place in Zambia and Malawi, where prior NIH-funded collaborations have assisted in developing the substantial infrastructure needed to undertake a clini- cal trial of this nature.

尽管正在努力根除疟疾，但疟疾仍然是非洲的一个重大公共卫生挑战，每年，