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在韩国分离的B组菌株中阿尔法样蛋白的基因型分布:疫苗覆盖范围的影响
Ji Hyen Lee1,2, Hye-Kyung Cho1,3, Kyung-Hyo Kim1,3
1Center for Vaccine Evaluation and Study, Ewha Womans University College of Medicine, Seoul, Korea.
Infection & chemotherapy
|June 9, 2025
概括
在韩国研究了B组链球菌 (GBS) 的α类蛋白 (alp) 基因型. 肋骨基因型是最常见的,这表明阿尔卑斯山蛋白质疫苗可以预防流行的GBS菌株.
科学领域:
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
- 流行病学 流行病学
背景情况:
- 乙组链球菌 (GBS) 在新生儿和易受感染的成年人中引起严重的侵入性细菌性疾病.
- 针对GBS的疫苗开发正在进行中,针对像囊多糖和α类蛋白质 (Alps) 这样的抗原.
- 关于GBS抗原的流行病学数据对于疫苗有效性预测至关重要,韩国缺乏关于阿尔卑斯山群的基因型的数据.
研究的目的:
- 在韩国的临床B组链球菌菌株中研究alpha样蛋白 (alp) 基因型的分布和特征.
- 为预测GBS疫苗的有效性提供必要的流行病学数据,特别是针对阿尔卑斯山的疫苗.
主要方法:
- 从临床样本 (2000-2018) 中分离的386个GBS菌株的分析.
- 使用幻灯片乳聚合和聚合酶链反应对特定基因 (bca,肋骨,alp1-4) 的血清型验证.
- 根据样本来源和基因型分布分析,将菌株分类为侵入性或非侵入性.
主要成果:
- 血清型III是最常见的 (28.2%),79.5%的菌株被现有的六值疫苗配方所覆盖.
- 肋骨基因型是最常见的阿尔法样蛋白 (alp) 基因型 (39.4%),非侵入性菌株的流行率更高.
- 侵袭性菌株主要从血液中分离出来,而非侵袭性菌株更常见于阴道和尿道部位.
结论:
- alp基因型的分布在侵袭性和非侵袭性GBS菌株之间有所不同,其中BCA和肋骨的比例很大.
- 预计将采用Rib和Cα抗原的Alp蛋白质疫苗,对韩国常见的GBS菌株提供保护.
- 建议对GBS阴道殖民和新生儿菌株进行进一步的流行病学研究,以加强早期败血症的预防.
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