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Updated: Jul 28, 2025

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在使用3D OrbiSIMSS的生物膜中识别Pseudomonas aeruginosa外聚糖 Psl

Heba Khateb^1,2, Andrew L Hook¹, Stefanie Kern³

¹Advanced Materials and Healthcare Technologies Division, School of Pharmacy, University of Nottingham, Nottingham, United Kingdom.

|May 31, 2023

概括

这项研究使用3D OrbiSIMS进行无标签的多糖类的质谱测量,如 Pseudomonas aeruginosa 生物膜中的 Psl. 它成功地在生物膜中识别了PSL碎片,进步了现场分子分析.

科学领域:

生物物理化学生物物理化学
分析化学分析化学
微生物学微生物学

背景情况:

多糖是质谱学的具有挑战性的分析剂.
二次离子质谱 (SIMS) 允许直接在现场分析,并保留样品的3D位置.
来自Pseudomonas aeruginosa的PSL外聚糖对生物膜形成至关重要.

研究的目的:

为PSL开发一种无标签的质谱法.
使用3D OrbiSIMS来准确地分配PSL的二次离子.
在P. aeruginosa生物膜中识别PSL碎片.

主要方法:

使用3D OrbiSIMS与OrbiTrap分析仪实现高质量分辨能力.
分析纯化的PSL和一个P. aeruginosa生物膜.
使用互补的中性损失序列来识别寡糖片段.

主要成果:

成功确定了17个峰值,可靠地分配到生物膜矩阵中的PSL片段.
证明了PSL的无标签质谱学.
验证了3D OrbiSIMS用于现场多糖体分析的使用.

结论:

3D OrbiSIMS 在PSL的无标签质谱学中是有效的.
这种方法可以在复杂的生物矩阵中准确识别PSL碎片.
该方法可以在现场分析诸如多糖类等具有挑战性的生物分子.

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Biofilms

Biofilms

Biofilms are complex communities of microorganisms encased in a self-produced extracellular polysaccharide matrix attached to surfaces. These microbial consortia can include single or multiple species, providing enhanced survival benefits by forming organized, multilayered structures.The formation of biofilms occurs through four key stages: attachment, colonization, development, and dispersal.During attachment, free-swimming planktonic cells adhere to a surface, often facilitated by...