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Targeted deep amplicon sequencing of kelch 13 and cytochrome b in Plasmodium falciparum isolates from an endemic African country using the Malaria Resistance Surveillance (MaRS) protocol
Parasites & Vectors ( IF 3.2 ) Pub Date : 2020-03-14 , DOI: 10.1186/s13071-020-4005-7
Mariangela L'Episcopia 1 , Julia Kelley 2 , Dhruviben Patel 2 , Sarah Schmedes 3 , Shashidahar Ravishankar 4 , Michela Menegon 1 , Edvige Perrotti 1 , Abduselam M Nurahmed 5 , Albadawi A Talha 6, 7 , Bakri Y Nour 8 , Naomi Lucchi 9 , Carlo Severini 1 , Eldin Talundzic 9
Affiliation  

Routine molecular surveillance for imported drug-resistant malaria parasites to the USA and European Union is an important public health activity. The obtained molecular data are used to help keep chemoprophylaxis and treatment guidelines up to date for persons traveling to malaria endemic countries. Recent advances in next-generation sequencing (NGS) technologies provide a new and effective way of tracking malaria drug-resistant parasites. As part of a technology transfer arrangement between the CDC Malaria Branch and the Istituto Superiore di Sanità (ISS), Rome, Italy, the recently described Malaria Resistance Surveillance (MaRS) protocol was used to genotype 148 Plasmodium falciparum isolates from Eritrea for kelch 13 (k13) and cytochrome b (cytb) genes, molecular markers associated with resistance to artemisinin (ART) and atovaquone/proguanil (AP), respectively. Spanning the full-length k13 gene, seven non-synonymous single nucleotide polymorphisms (SNPs) were found (K189N, K189T, E208K, D281V, E401Q, R622I and T535M), of which none have been associated with artemisinin resistance. No mutations were found in cytochrome b. All patients successfully genotyped carried parasites susceptible to ART and AP treatment. Future studies between CDC Malaria Branch and ISS are planned to expand the MaRS system, including data sharing, in an effort to maintain up to date treatment guidelines for travelers to malaria endemic countries.

中文翻译:

使用疟疾耐药性监测 (MaRS) 协议对来自非洲流行国家的恶性疟原虫分离株中的 kelch 13 和细胞色素 b 进行靶向深度扩增子测序

对美国和欧盟进口的抗药性疟疾寄生虫的常规分子监测是一项重要的公共卫生活动。获得的分子数据用于帮助前往疟疾流行国家旅行的人保持最新的化学预防和治疗指南。新一代测序 (NGS) 技术的最新进展提供了一种新的、有效的追踪疟疾耐药寄生虫的方法。作为 CDC 疟疾科和意大利罗马高等卫生研究院 (ISS) 之间技术转让安排的一部分,最近描述的疟疾耐药性监测 (MaRS) 协议用于对来自厄立特里亚的 148 株恶性疟原虫进行基因分型,以获得 kelch 13( k13) 和细胞色素 b (cytb) 基因,分别与青蒿素 (ART) 和阿托伐醌/氯胍 (AP) 抗性相关的分子标记。跨越全长 k13 基因,发现了七个非同义单核苷酸多态性 (SNP)(K189N、K189T、E208K、D281V、E401Q、R622I 和 T535M),其中没有一个与青蒿素抗性相关。在细胞色素 b 中未发现突变。所有成功基因分型的患者都携带对 ART 和 AP 治疗敏感的寄生虫。CDC 疟疾分会和 ISS 之间的未来研究计划扩大 MaRS 系统,包括数据共享,以努力为前往疟疾流行国家的旅行者保持最新的治疗指南。其中没有一个与青蒿素耐药有关。在细胞色素 b 中未发现突变。所有成功基因分型的患者都携带对 ART 和 AP 治疗敏感的寄生虫。CDC 疟疾分会和 ISS 之间的未来研究计划扩展 MaRS 系统,包括数据共享,以努力为前往疟疾流行国家的旅行者保持最新的治疗指南。其中没有一个与青蒿素耐药有关。在细胞色素 b 中未发现突变。所有成功基因分型的患者都携带对 ART 和 AP 治疗敏感的寄生虫。CDC 疟疾分会和 ISS 之间的未来研究计划扩展 MaRS 系统,包括数据共享,以努力为前往疟疾流行国家的旅行者保持最新的治疗指南。
更新日期:2020-03-16
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