West African Centre for Cell Biology of Infectious Pathogens, Department of Biochemistry Cell and Molecular Biology, University of Ghana, Accra, Ghana.
Department of Immunology, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana.
BMC Infect Dis. 2018 Dec 12;18(1):650. doi: 10.1186/s12879-018-3556-0.
BACKGROUND: About 80% of all reported sickle cell disease (SCD) cases in children anually are recorded in Africa. Although malaria is considered a major cause of death in SCD children, there is limited data on the safety and effectiveness of the available antimalarial drugs used for prophylaxis. Also, previous systematic reviews have not provided quantitative measures of preventive effectiveness. The purpose of this research was to conduct a systematic review and meta-analysis of the available literature to determine the safety and effectiveness of antimalarial chemoprophylaxis used in SCD patients. METHODS: We searched in PubMed, Medline, CINAHL, POPLine and Cochrane library, for the period spanning January 1990 to April 2018. We considered randomized or quasi-randomized controlled trials comparing any antimalarial chemoprophylaxis to, 1) other antimalarial chemoprophylaxis, 2) placebo or 3) no intervention, in SCD patients. Studies comparing at least two treatment arms, for a minimum duration of three months, with no restriction on the number of patients per arm were reviewed. The data were extracted and expressed as odds ratios. Direct pairwise comparisons were performed using fixed effect models and the heterogeneity assessed using the I-square. RESULTS: Six qualified studies that highlighted the importance of antimalarial chemoprophylaxis in SCD children were identified. In total, seven different interventions (Chloroquine, Mefloquine, Mefloquine artesunate, Proguanil, Pyrimethamine, Sulfadoxine-pyrimethamine, Sulfadoxine-pyrimethamine amodiaquine) were evaluated in 912 children with SCD. Overall, the meta-analysis showed that antimalarial chemoprophylaxis provided protection against parasitemia and clinical malaria episodes in children with SCD. Nevertheless, the risk of hospitalization (OR = 0.72, 95% CI = 0.267-1.959; I = 0.0%), blood transfusion (OR = 0.83, 95% CI = 0.542-1.280; I = 29.733%), vaso-occlusive crisis (OR = 19, 95% CI = 1.713-2.792; I = 93.637%), and mortality (OR = 0.511, 95% CI = 0.189-1.384; I = 0.0%) did not differ between the intervention and placebo groups. CONCLUSION: The data shows that antimalarial prophylaxis reduces the incidence of clinical malaria in children with SCD. However, there was no difference between the occurrence of adverse events in children who received placebo and those who received prophylaxis. This creates an urgent need to assess the efficacy of new antimalarial drug regimens as potential prophylactic agents in SCD patients. SYSTEMATIC REVIEW REGISTRATION: PROSPERO (CRD42016052514).
背景:每年约有 80%报告的儿童镰状细胞病(SCD)病例发生在非洲。尽管疟疾被认为是 SCD 儿童死亡的主要原因,但对于用于预防的现有抗疟药物的安全性和有效性的数据有限。此外,以前的系统评价没有提供预防效果的定量衡量标准。本研究旨在对现有文献进行系统评价和荟萃分析,以确定 SCD 患者使用抗疟化学预防的安全性和有效性。
方法:我们在 PubMed、Medline、CINAHL、POPLine 和 Cochrane 图书馆中搜索了 1990 年 1 月至 2018 年 4 月期间的文献。我们考虑了比较任何抗疟化学预防与 1)其他抗疟化学预防、2)安慰剂或 3)无干预措施的随机或半随机对照试验,在 SCD 患者中。我们对至少比较了两种治疗方案、持续时间至少为三个月、且每个方案中患者数量不受限制的研究进行了综述。提取数据并表示为优势比。直接两两比较使用固定效应模型进行,使用 I 平方评估异质性。
结果:确定了 6 项强调 SCD 儿童中抗疟化学预防重要性的合格研究。总共评估了 7 种不同的干预措施(氯喹、甲氟喹、甲氟喹-青蒿琥酯、丙氨嘧啶、乙胺嘧啶、磺胺多辛-乙胺嘧啶、磺胺多辛-乙胺嘧啶-氨喹)在 912 名 SCD 儿童中。总体而言,荟萃分析表明,抗疟化学预防可预防 SCD 儿童的寄生虫血症和临床疟疾发作。然而,住院(OR=0.72,95%CI=0.267-1.959;I=0.0%)、输血(OR=0.83,95%CI=0.542-1.280;I=29.733%)、血管阻塞性危象(OR=19,95%CI=1.713-2.792;I=93.637%)和死亡率(OR=0.511,95%CI=0.189-1.384;I=0.0%)在干预组和安慰剂组之间没有差异。
结论:数据表明,抗疟预防可降低 SCD 儿童临床疟疾的发生率。然而,接受安慰剂和接受预防的儿童发生不良事件的发生率没有差异。这迫切需要评估新的抗疟药物方案作为 SCD 患者潜在预防药物的疗效。
系统评价注册:PROSPERO(CRD42016052514)。
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