NEJM:letermovir可有效预防造血细胞移植者巨细胞病毒感染

2014-05-22 佚名 dxy

巨细胞病毒疾病对于免疫缺陷患者来说是一种严重的、威胁生命的疾病。尤其是在同种异体造血细胞移植接受者中,巨细胞病毒(CMV)血症发生率达到了50%至60%,其可能进展成CMV疾病。 标准的治疗是静脉给予更昔洛韦或口服制品缬更昔洛韦,或者静脉注射膦甲酸或西多福韦。尽管有效,但是这些治疗具有显著的临床药物特异性影响,包含骨髓移植和肾毒性,使得这些药物在同种异体造血细胞移植接受者中的使用增加了难度。因此

巨细胞病毒疾病对于免疫缺陷患者来说是一种严重的、威胁生命的疾病。尤其是在同种异体造血细胞移植接受者中,巨细胞病毒(CMV)血症发生率达到了50%至60%,其可能进展成CMV疾病。

标准的治疗是静脉给予更昔洛韦或口服制品缬更昔洛韦,或者静脉注射膦甲酸或西多福韦。尽管有效,但是这些治疗具有显著的临床药物特异性影响,包含骨髓移植和肾毒性,使得这些药物在同种异体造血细胞移植接受者中的使用增加了难度。因此,同种异体造血细胞移植接受者迫切需要安全及有效的抗CMV预防措施。

Letermovir(AIC246)是新型高效抗CMV药物,它的作用机制是靶向于病毒末端酶亚单位pUL56,此亚单位是参与病毒DNA 裂解和包装的末端酶的成分之一,而且Letermovir不作用于人体中的任何酶。因此对现获准抗病毒药物耐药的CMV感染患者来说,letermovir或许是一个新的有效治疗选择。

为评估接受同种异体造血细胞移植患者口服Letermovir对于预防CMV病毒血症或疾病的安全性和有效性,德国的Gerhard Ehninger博士和他的AIC246研究组对此进行研究,发现letermovir可有效预防造血细胞移植者CMV感染并呈剂量依赖性。该文在线发表在2014年5月8日的NEJM上。

此研究为Ⅱ期临床试验研究,2010年3月至2011年10月,研究者评估了一种新的抗CMV药物letermovir对于CMV血清阳性同种异体造血细胞接受者发生预防失败和发生时间的影响。研究人员根据双盲设计随机将131名移植接受者以3比1的比例分成3个连续的研究群体。

患者在进行移植后口服letermovir(每日的剂量分别为60mg、120mg和240mg,安慰剂),持续12周。主要的评估指标是所有原因的预防失败,停药的指标包括检测到CMV抗原或DNA或晚期器官疾病或其他原因。

研究结果显示,所有原因的预防失败发生率的降低是呈letermovir剂量依赖性的。与安慰剂组的64%相比,每日用 letermovir 60mg、120mg和240mg组发生预防失败的概率分别为48%、32%和29%。

Kaplan-Meier结果显示,预防失败潜伏期在每日服用240mg letermovir组和安慰剂组之间存在着显著差异。而服用letermovir组的安全性和安慰剂组相似,没有血液学毒性或肾毒性。

研究结果认为,与安慰剂相比,letermovir可有效减少同种异体造血细胞移植接受者中CMV感染的发病率。最高剂量(每日240mg)具有最强的抗CMV活性,其安全性良好。

原始出处

Chemaly RF1, Ullmann AJ, Stoelben S, Richard MP, Bornhäuser M, Groth C, Einsele H, Silverman M, Mullane KM, Brown J, Nowak H, Kölling K, Stobernack HP, Lischka P, Zimmermann H, Rübsamen-Schaeff H, Champlin RE, Ehninger G; AIC246 Study Team.Letermovir for cytomegalovirus prophylaxis in hematopoietic-cell transplantation.N Engl J Med. 2014 May 8;

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    2015-05-03 apoenzyme
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    2014-05-24 俅侠
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    2014-05-24 wwzzly
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