从疫情爆发的真菌物种复合体中,基于泛欧米学的高度多药适应菌株的表征和预测
Xin Fan1,2,3, Lei Chen3, Min Chen4
1Department of Infectious Diseases and Clinical Microbiology, Beijing Institute of Respiratory Medicine and Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, China.
Innovation (Cambridge (Mass.))
|September 4, 2024
概括
导致重大疫情的Cryptococcus gattii菌株表现出显著的多药性耐药性. 研究人员确定了基因和生物标志物,以预测这些危险的真菌菌株.
科学领域:
- 医学真菌学 医学真菌学
- 在真菌病原体的产生过程中.
- 基因组学和转录基因组学
背景情况:
- 加密球菌 (Cryptococcus gattii) 种群复合体 (CGSC) 是太平洋西北地区严重爆发加密球菌病的原因.
- 这次疫情代表了在免疫能力强的人群中最大的已知生命危险的真菌感染群.
研究的目的:
- 综合评估CGSC菌株在各种压力条件下的适应性.
- 确定CGSC中多药耐药性的遗传决定因素,特别是在爆发菌株中.
- 为高度适应多种药物的CGSC菌株开发预测性生物标志物.
主要方法:
- 基于泛现象的方法被用于评估CGSC在31个压力条件中的应变适应性.
- 进行了表型聚类分析,以确定应激适应的相关性.
- 综合泛基因组和泛转录组分析被用来发现耐药性基因.
- 机器学习算法被用来开发可预测的生物标志物.
主要成果:
- 确定了超过2800种表型-菌株关联.
- 一组CGSC菌株,包括疫情分离物,对三种主要抗真菌药物表现出适应性.
- 在疫情爆发的菌株中,先前未被识别的赋予多药抗性的基因被确定.
- 生物标志物在预测多药适应菌株方面实现了高精度 (0.79) 和AUC (0.86).
结论:
- 一种泛欧米的方法成功地确定了Cryptococcus gattii.i.中多药耐药性的决定因素.
- 预测性生物标志物可以准确地识别临床相关的,高度适应多种药物的CGSC菌株.
- 这项研究为管理加密球菌病爆发和抗真菌耐药性提供了关键的见解.
相关概念视频
Modern Molecular Taxonomy
836
Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
836
Clinical Significance of Antibiotic Resistance
90
Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within...
90


