在状细胞病患者接种COVID-19疫苗后,幽默和细胞免疫反应对氧尿素进行了免疫反应
Sabine Haggenburg1, Cilia R Pothast2, Quincy Hofsink3
1Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands.
Blood advances
|November 26, 2025
概括
患有状细胞疾病 (SCD) 的患者对COVID-19的疫苗诱导免疫力降低,这可能解释了他们较高的死亡风险. 第三剂疫苗改善了抗体反应,但没有改善T细胞细胞因子的产生.
科学领域:
- 免疫学 免疫学 免疫学
- 血液学 血液学 血液学
- 传染性疾病 传染性疾病
背景情况:
- 状细胞病 (SCD) 患者面临更高的COVID-19死亡率,甚至在接种疫苗后.
- 疫苗免疫力受损对这种风险增加的影响尚不清楚.
研究的目的:
- 在患有SCD的患者中调查COVID-19 mRNA疫苗免疫性.
- 为了比较疫苗接种SCD患者和健康个体之间的幽默和细胞免疫反应.
主要方法:
- 对31名用氨酸尿素治疗的SCD患者进行前性研究,这些患者接种了COVID-19 mRNA.
- 量化幽默 (抗体度,B细胞子集) 和细胞 (T细胞频率,细胞因子产生) 免疫反应.
- 与第二次和第三次接种疫苗后年龄,性别和疫苗匹配的健康对照进行比较.
主要成果:
- SCD患者的抗体水平和B细胞记忆频率相似,但T细胞的1型细胞因子产生减少.
- 减少的免疫反应与更高的胎儿血红蛋白水平相关,这表明与氧尿素有联系.
- 第三次接种疫苗增强了抗体和B细胞的反应,但T细胞Th1细胞因子的产生仍然低于对照组.
结论:
- 在SCD患者中,疫苗诱导的免疫力可能会延迟或减少,特别是T细胞的反应.
- 这种免疫力受损可能会导致SCD中COVID-19严重结局的风险增加.
- 对优化SCD患者疫苗接种策略的进一步研究是有必要的.
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