在CRISPR-Cas9中,Saccharomyces cerevisiae被用于输送内素,以对抗Listeria monocytogenes
David Sáez Moreno1, Joana Cunha1,2, Luís Daniel Rodrigues de Melo1,2,3
1CEB - Centre of Biological Engineering, University of Minho, Braga, Portugal.
Applied microbiology and biotechnology
|April 2, 2025
概括
酵母分泌Ply511内素可以有效地对抗Listeria monocytogenes. 这种使用Saccharomyces cerevisiae的无标记方法提供了一种稳定,安全的解决方案,通过生物控制剂控制李斯特菌病.
科学领域:
- 微生物学 微生物学
- 生物技术是生物技术.
- 食品安全 食品安全
背景情况:
- 由Listeria monocytogenes引起的菌病,对健康构成重大风险,特别是对弱势群体.
- 菌体内素,如Ply511,通过准细菌细胞壁来控制L. monocytogenes的潜力.
- 以前的基于酵母的内素生产方法面临着基因稳定性和治疗适用性的挑战.
研究的目的:
- 开发一种稳定,无标记的方法来生产抗Listeria内素Ply511,使用通常被认为是安全的 (GRAS) 酵母Saccharomyces cerevisiae.
- 为了评估酵母显示和酵母分泌的Ply511对L. monocytogenes的疗效.
主要方法:
- 利用CRISPR-Cas9基因编辑将Ply511内素基因整合到S. cerevisiae基因组中.
- 工程酵母菌株用于表面显示或分泌Ply511内分泌物.
- 评估了各种形式 (细胞,超级剂,提取物) 和食品矩阵 (牛奶) 中的人工酵母的抗菌活性.
主要成果:
- 在酵母上表面展示Ply511并没有导致显著的细菌减少.
- 分泌Ply511的酵母菌株在细胞,超级生物和细胞提取物中显著减少了L. monocytogenes.
- 缩的酵母超和细胞提取物降低了L. monocytogenes低于可检测水平.
- 在使用过的超剂中分泌的Ply511在牛奶中保留了抗李斯特菌活性.
结论:
- 由S. cerevisiae分泌的内素是一种可行的和有效的策略,用于对L. monocytogenes等致病性细菌进行生物控制.
- 这种基于酵母的分泌系统为菌控制提供了一个有前途,稳定和治疗上合适的平台.
- 通过CRISPR-Cas9调解的基因组集成为增强的生物控制剂开发提供了一个无标记剂的方法.
相关概念视频
CRISPR
48.6K
Genome editing technologies allow scientists to modify an organism’s DNA via the addition, removal, or rearrangement of genetic material at specific genomic locations. These types of techniques could potentially be used to cure genetic disorders such as hemophilia and sickle cell anemia. One popular and widely used DNA-editing research tool that could lead to safe and effective cures for genetic disorders is the CRISPR-Cas9 system. CRISPR-Cas9 stands for Clustered Regularly Interspaced...
48.6K
CRISPR and crRNAs
16.4K
Bacteria and archaea are susceptible to viral infections just like eukaryotes; therefore, they have developed a unique adaptive immune system to protect themselves. Clustered regularly interspaced short palindromic repeats and CRISPR-associated proteins (CRISPR-Cas) are present in more than 45% of known bacteria and 90% of known archaea.
The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...
The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...
16.4K


