发热伴血小板减少综合征研究热点的可视化分析

[摘要]　目的　对发热伴血小板减少综合征（severe fever with thrombocytopenia syndrome, SFTS）的相关文献进行文献计量学和可视化分析，探寻近年来的研究现状、热点及趋势，为临床治疗和基础研究提供参考。方法?以Web of Science（WOS）核心合集和中国知网（China national knowledge infrastructure, CNKI）数据库为文献来源，检索2011年1月1日—2021年12月31日有关SFTS的文献，导入CiteSpace.5.7.R2软件，以国家、作者、文献共被引、关键词为节点进行可视化分析，并绘制相关图谱。结果?在WOS核心合集共检索到797篇文献，在CNKI数据库共检索到714篇文献。相关领域发文量总体呈上升趋势，中国发文量居首位，美国和日本之间机构合作密切。研究热点集中在发病机制、抗体、特异性治疗等领域。非结构蛋白、临床预后、血小板减少、SFTS感染的靶细胞等将是未来的研究重点。结论?国内外关于SFTS的研究逐渐成熟，新型布尼亚病毒、免疫功能、预后是研究重点，但是对SFTS发病机制和病毒受体尚不清楚，仍须进一步探索。     

The Wiskott–Aldrich syndrome: from genotype–phenotype correlation to treatment

Development of patient-tailored prognostic and therapeutic strategies remains a major, yet largely unmet, goal of medicine. Studies performed in patients who carry mutations in the Wiskott–Aldrich syndrome protein (WASP) gene have indicated the feasibility, but also the limitations, of this approach. In this review, we discuss the importance of specific WASP mutations, and their effects on protein expression and function in determining the spectrum of clinical phenotypes associated with WASP defects. The array of currently available and foreseeable therapeutic options is reviewed in this context as a model for other more common genetic disorders.     

舟山市3例发热伴血小板减少综合征的病原学与遗传特征

目的 对舟山市3例疑似发热伴血小板减少综合征(SFTS)病例进行病原学鉴定、确诊,并分析其遗传特征.方法 选用巢式RT-PCR测定新布尼亚病毒核酸及L、M、S3个特异性基因,并对基因扩增产物进行测序,测序结果与GenBank上公布的序列进行比对确认.用DNAStar软件构建进化树与序列距离表.用间接免疫荧光法测定患者恢复期和急性期血清新布尼亚病毒IgG抗体滴度.结果 3例SFTS患者急性期血清中均能检测到新布尼亚病毒的3个特异性基因片段,其中S基因核苷酸序列与舟山市同类基因核苷酸序列的同源性在94.4％～ 100.0％,患者恢复期血清病毒抗体滴度较急性期增高4倍以上.结论 经过病原学鉴定,3例临床疑似患者确诊为发热伴血小板减少综合征的新近感染病例.舟山市新布尼亚病毒的遗传特征比较稳定.     

Prevalence of SFTSV among Asian House Shrews and Rodents,China, January–August 2013

To evaluate the role of small mammals as hosts of severe fever with thrombocytopenia syndrome virus (SFTSV), we tested serum samples from rodents and shrews in China, collected in 2013. SFTSV antibodies and RNA were detected, suggesting that rodents and shrews might be hosts for SFTSV.     

Multiple in silico tools predict phenotypic manifestations in congenital thrombotic thrombocytopenic purpura

Congenital thrombotic thrombocytopenic purpura (cTTP) is a rare, recessively inherited genetic disorder with varying clinical presentation that is caused by ADAMTS13 mutations. Several studies have found limited associations between ADAMTS13 mutations and cTTP phenotype. The use of in silico tools that examine multiple mutation characteristics may better predict phenotype. We analysed 118 ADAMTS13 mutations found in 144 cTTP patients reported in the literature and examined associations of several mutation characteristics, including N‐terminal proximity, the evolutionary conservation of the affected amino acid position, as well as amino acid charge/phosphorylation and genetic codon usage to disease phenotype. Structure‐altering mutations were examined for their impact on ADAMTS13 function based on existing ADAMTS13 crystallographic data (AA 77‐685). Our in silico data indicate that: (i) The position of the mutation in the N‐ or C‐terminus, (ii) evolutionary conservation and (iii) codon usage of the affected mutation position are associated with disease parameters, such as age of onset, organ damage and fresh frozen plasma prophylaxis. In conclusion, the usage of multiple in silico tools presents a promising strategy in refining predictions for the diverse presentation of cTTP. Enhancing our utilization of in silico tools to find genotype‐phenotype associations will create better‐tailored approaches for individual patient treatment.     

两例EDTA依赖性假性血小板减少应用阿米卡星无效探讨

目的探讨2例乙二胺四乙酸(EDTA)依赖性假性血小板减少应用阿米卡星无效的机制。方法对2例EDTA依赖性假性血小板减少症患者的EDTA-K2抗凝血,在不同时间段分别加入阿米卡星,在血液分析仪检测,血涂片检查。结果该2名患者,加或不加阿米卡星,其血小板数均会随着时间的延长逐渐增加,其特征性的直方图也会随着时间的延长而消失,加入阿米卡星会获得更可靠的结果。结论阿米卡星并不能立即解离2例患者聚集的血小板,但随着时间延长,血小板缓慢解离,至4h达到相对稳定。1h内加入阿米卡星较为理想,相对普通EDTA抗凝可有效加速其解离过程,获得理想结果。