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AASLD2017:我国香港学者发现:慢乙肝口服选择性免疫调节剂安全有效

2017-10-24 佚名 国际肝病

SB 9200是一种新型口服选择性免疫抑制剂,以宿主识别模式受体维甲酸诱导基因(RIG-I)和核苷酸寡聚化域蛋白2(NOD2)为目标,激活先天和适应性免疫。基因1型HCV感染患者每天应用400 mg的SB 9200,治疗7天,可以使30%患者的HCV RNA水平下降> 0.9 log,认为与聚乙二醇干扰素等效。

SB 9200是一种新型口服选择性免疫抑制剂,以宿主识别模式受体维甲酸诱导基因(RIG-I)和核苷酸寡聚化域蛋白2(NOD2)为目标,激活先天和适应性免疫。基因1型HCV感染患者每天应用400 mg的SB 9200,治疗7天,可以使30%患者的HCV RNA水平下降> 0.9 log,认为与聚乙二醇干扰素等效。

在本届AASLD年会上,我国香港大学医学院香港玛丽医院袁孟峰教授等交流的一项研究表明,无肝硬化的慢性乙型肝炎(CHB)初治患者应用低剂量SB 9200(25 mg/d)治疗的安全性良好,具有抗病毒活性,符合免疫激活作用,并且可能具有抑制cccDNA的作用,HBeAg阴性患者的应答强于HBeAg阳性患者。

ACHIEVE试验为一项在CHB初治患者中进行的双盲、安慰剂对照2期研究,确定SB 9200作为单药治疗以及与替诺福韦(300 mg/d)联合应用时的最佳剂量,20例无肝硬化的CHB初治患者以4:1的比例,随机分组至接受SB 9200(25 mg/d)或安慰剂治疗12周,主要终点为安全性和由12周时HBV DNA水平下降定义的抗病毒应答。

患者的基线特征:男性12例,女性8例,平均年龄为40.5岁,亚裔18例,白人2例,11例为HBeAg阳性,9例为HBeAg阴性,基因A型2例,B型9例,C型7例,D型2例,HBeAg阳性患者基线时的病毒载量高于HBeAg阴性患者(平均HBV DNA水平分别为7.1 log10和5.5 log10,平均定量HBsAg水平分别为4.38 log10和3.18 log10)。

结果,无临床、血液学或生化方面的严重不良事件或干扰素样副作用发生,11例患者发生治疗相关的不良事件,SB 9200和安慰剂组患者不良事件的数量或类型无差异,最常见的不良事件为便秘、腹痛、恶心和腹泻等非特异性胃肠道症状(20%),所有不良事件的分级均为轻至中度,3例患者的丙氨酸氨基转移酶(ALT)水平明显升高(>200 IU/L)。

应用安慰剂的2例患者发生病毒学加重,包括1例HBeAg阴性患者逆转为HBeAg阳性,应用SB 9200的1例患者于4周时发生与免疫激活有关的加重,HBV DNA水平下降2.32 log10,HBsAg水平下降1.01 log10,所有3例患者均减量至隔日一次用药。

第12周时,SB 9200和安慰剂组患者的平均HBV DNA变化为-0.58 log 10和+0.37 log10(P=0.014),应用SB 9200治疗HBeAg阴性患者的平均HBV DNA下降幅度大于HBeAg阳性患者(-0.86 log10对比-0.37 log10)。总体上,16例中的5例(31%)患者HBsAg下降幅度>0.5 log10(范围:0.52 log10~1.01 log10)。

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    2017-12-23 海豹
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    2017-10-26 lq1771

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