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J Natl Cancer I:不同剂量HPV16/18疫苗接种7年后效果如何?

2017-10-31 吴星 环球医学

2018年2月,发表在《J Natl Cancer Inst》的一项研究调查了接受不同剂量HPV16/18疫苗的女性在接种疫苗后7年保护作用的持续情况及抗体水平。结果显示,在平均随访7年时间中,研究者观察到不同剂量组相似的HPV16/18低感染率,以及抗体水平的略微降低。

2018年2月,发表在《J Natl Cancer Inst》的一项研究调查了接受不同剂量HPV16/18疫苗的女性在接种疫苗后7年保护作用的持续情况及抗体水平。结果显示,在平均随访7年时间中,研究者观察到不同剂量组相似的HPV16/18低感染率,以及抗体水平的略微降低。

背景:此前,研究者在一项考察女性接受不同剂量二价人乳头状瘤病毒(HPV)疫苗的非随机分析中证实了HPV 16/18疫苗的有效性相似,且接种疫苗后4年的抗体水平稳定。在此,研究者将初始疫苗接种的数据扩展至7年。

方法:研究者评价了直至接种后中位6.9年,接种1剂(134例)、2剂(0/1,193例;0/6,79例)或3剂(2043例)HPV16/18疫苗的女性。使用SPF10- DEIA-LiPA PCR系统,测量子宫HPV DNA;使用联免疫吸附剂测定测量特定HPV16/18抗体的水平(486例)。比较不同剂量组的感染免疫指标。在第7年,比较接种组与非接种对照组(UCG)之间的HPV病毒感染情况。所有统计学检测均为双边。

结果:在3剂组、2剂0/6组、2剂0/1组和1剂组中,HPV16/18累积感染率(事件数量/个体数量)分别为4.3%(88/2036,95%置信区间[CI] = 3.5%~5.3%)、3.8%(3/78,95% CI?=?1.0%~10.1%)、3.6%(7/192,95% CI?=?1.6%~7.1%)和1.5%(2/133,95% CI?=?0.3%~4.9%;2剂0/6组、2剂0/1组和1剂组与3剂组相比P 分别= 1.00、0.85和0.17)。排除HPV16/18/31/33/45,其他癌症及非致癌HPV型患病率高,且在所有组中没有显着性差异,表明,1剂接种和2剂接种组的低HPV16/18感染风险与缺少疫苗暴露无关。第7年,所有剂量组100%的受试者保持HPV16和HPV18血清反应阳性。在3剂组:–10.8%(95% CI =–25.3%~6.6%)、2剂(0/6个月)组:–17.3%(95% CI =–39.3%~12.8%)、2剂(0/1个月)组:–6.9%(95% CI =–22.1%~11.2%)和1剂组:–5.5%(95% CI =–29.7%~27.0%)的女性中观察到4至7年HPV16抗体水平的几何平均数有非统计学意义的显着降低。HPV18的结果相似。

结论:在平均随访7年时间中,研究者观察到不同剂量组相似的HPV16/18低感染率,且抗体水平的略微降低。

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    2018-02-22 qidongfanjian
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    2018-04-15 liye789132251
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