在Acinetobacter baumannii呼吸道感染中T6SS核心基因hcp的值
Yin-Yin Hu1, Shuo Chen2, Ya-Dong Zhang3
1Department of Clinical Laboratory, Nanyang Central Hospital, Nanyang, 473000 Henan Province China.
Indian journal of microbiology
|October 2, 2023
概括
血清素共同调节蛋白 (Hcp) 基因显示为Acinetobacter baumannii肺炎的诊断标记物具有前途. 高Hcp表达与A. baumannii感染中药物耐药性增加相关.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 传染性疾病 传染性疾病
背景情况:
- 由Acinetobacter baumannii引起的在医院获得的肺炎是一个重大的医疗保健挑战.
- 第六类分泌系统 (T6SS) 涉及到A. baumannii的毒性和抗生素耐药性.
研究的目的:
- 评估A. baumannii肺炎中血清素共同调节蛋白 (Hcp) 基因的诊断效用.
- 研究hcp表达对A. baumannii的临床表现,致病性和耐药性的影响.
主要方法:
- 用实时定量PCR (qRT-PCR) 来评估hcp基因表达的53种临床A. baumannii菌株的分析.
- 在体外刺激THP-1巨细胞,用纯化的标记Hcp来分析炎症反应 (NF-κBp65,IL-8).
- 使用自动化系统进行的抗微生物敏感性测试 (AST).
主要成果:
- 该Hcp基因在区分入侵性A. baumannii和殖民性的过程中表现出92.6%的敏感性和75%的特异性.
- 重组Hcp诱导了巨细胞中的NF-κBp65和IL-8表达.
- 具有高hcp表达率的隔离物表现出更高的carbapenem暴露率,组合抗生素治疗和多药/广泛抗药性 (MDR/XDR).
结论:
- Hcp基因可以作为一种新的生物标志物,用于区分A. baumannii呼吸道感染与殖民.
- Hcp在炎症反应中发挥作用,并可能导致耐卡巴因和MDR/XDR A. baumannii菌株的发展.
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