细菌/多肽纳米颗粒复合体的超微结构表征
卿光超,郭宏博,张宇轩,李宪磊,甘雅玲,罗 阳*,梁兴杰*
(1. 国家纳米科学中心,北京100190;2. 重庆大学医学院,重庆400044)
摘 要 细菌感染严重危害人类健康和公共卫生安全。基于抗菌肽(AMP)的多肽纳米颗粒在对抗细菌耐药中展现出巨大潜力,在多肽纳米颗粒与细菌相互作用的过程中,其超微结构形态的变化对阐明多肽纳米颗粒的抑菌机制至关重要。本文开发了一种对细菌具有较好亲和力的多肽纳米颗粒(BPN),并利用扫描电子显微镜(SEM)和透射电子显微镜(TEM)观察了金黄色葡萄球菌(S. aureus)和铜绿假单胞菌(P. aeruginosa)在结合BPN前后的超微结构形态。结果显示,与BPN共孵育后,细菌表面覆盖着明显的凸起状物质,表明BPN可以有效结合在S. aureus和P. aeruginosa表面。
关键词 微观形貌;多肽纳米颗粒;细菌
中图分类号:Q811;Q934;O629 文献标识码:A doi:10.3969/j.issn.1000-6281.2023.01.007
Ultrastructure of bacteria-peptide nanoparticle complex
QING Guang-chao,GUO Hong-bo,ZHANG Yu-xuan,LI Xian-lei,
GAN Ya-ling,LUO Yang*,LIANG Xing-Jie*
(1.National Center for Nanoscience and Technology, Beijing 100190; 2. School of medicine of Chongqing University, Chongqing 400044, China)
Abstract Bacterial infection is a life-threatening disease and seriously endangers public health. Antimicrobial peptide-based nanomaterials show great potential in combating bacterial antibiotic resistance. The bacterial ultrastructural change after treatment is conducive to elucidate the antibacterial mechanism of peptide-based nanoparticles. Here, we use SEM and TEM to observe the ultrastructure of Staphylococcus aureus (S. aureus) and Pseudomonas aeruginosa (P. aeruginosa) when co-incubated with a bacteria-captured peptide nanoparticle (BPN). The results show that bacteria are covered with obvious bulged material after co-incubation with BPN, indicating the effective binding capacity of BPN to S. aureus and P. aeruginosa.
Keywords micromorphology; peptide nanoparticles; bacteria
“全文下载请到同方知网,万方数据库或重庆维普等数据库中下载!”
[1] MURRAY C J, IKUTA K S, SHARARA F, et al. Global burden of bacterial antimicrobial resistance in 2019: a systematic analysis [J]. Lancet, 2022, 399(10325): 629-655.
[2] QING G C, ZHAO X X, GONG N Q, et al. Thermo-responsive triple-function nanotransporter for efficient chemo-photothermal therapy of multidrug-resistant bacterial infection [J]. Nature Communications, 2019, 10(1): 4336.
[3] O'NEILL J. Tackling drug-resistant infections globally: final report and recommendations [J]. Wellcome Trust, 2016.
[4] MORGAN D J, OKEKE I N, LAXMINARAYAN R, et al. Non-prescription antimicrobial use worldwide: a systematic review [J]. The Lancet Infectious Diseases, 2011, 11(9): 692-701.
[5] R O A R, GRANDE-BRETAGNE. Antimicrobial resistance: Tackling a crisis for the health and wealth of nations; Review on antimicrobial resistance [M]. 2014.
[6] PORTELINHA J, DUAY S S, YU S I, et al. Antimicrobial peptides and copper(II) ions: novel therapeutic opportunities [J]. Chemical Reviews, 2021, 121(4): 2648-2712.
[7] MWANGI J, YIN Y Z, WANG G, et al. The antimicrobial peptide ZY4 combats multidrug-resistant Pseudomonas aeruginosa and Acinetobacter baumannii infection [J]. Proceedings of the National Academy of Sciences of the United States of America, 2019, 116(52): 26516-26522.
[8] LI W Y, SEPAROVIC F, O'BRIEN-SIMPSON N M, et al. Chemically modified and conjugated antimicrobial peptides against superbugs [J]. Chemical Society Reviews, 2021, 50(8): 4932-4973.
[9] CHU H T, PAZGIER M, JUNG G, et al. Human α-defensin 6 promotes mucosal innate immunity through self-assembled peptide nanonets [J]. Science, 2012, 337(6093): 477-481.
[10] STAMBUK F, OJEDA C, MACHADO MATOS G, et al. Big defensin from the scallop Argopecten purpuratus ApBD1 is an antimicrobial peptide which entraps bacteria through nanonets formation [J]. Fish Shellfish Immunol, 2021, 119456-119461.
[11] FAN Y, LI X D, HE P P, et al. A biomimetic peptide recognizes and traps bacteria in vivo as human defensin-6 [J]. Science Advances, 2020, 6(19): eaaz4767.
[12] BAND V I, WEISS D S. Mechanisms of antimicrobial peptide resistance in gram-negative bacteria [J]. Antibiotics, 2015, 4(1): 18-41.
[13] LIU L H, XU K J, WANG H Y, et al. Self-assembled cationic peptide nanoparticles as an efficient antimicrobial agent [J]. Nature Nanotechnology, 2009, 4(7): 457-463.
[14] 赵晓欢, 吕洋, 巩志伟, 等. 纳米银对三种纤毛虫超微结构的影响[J]. 电子显微学报, 2020, 39(4): 392-398.
[15] QI G B, ZHANG D, LIU F H, et al. An "on-site transformation" strategy for treatment of bacterial infection [J]. Advanced Materials, 2017, 29(36).
[16] 胡西学, 郭宏博, 宫宁强, 等. 一种简单的光-电关联方法[J]. 电子显微学报, 2019, 38(4): 403-407.
[17] CHEN H, ZHANG M, LI B, et al. Versatile antimicrobial peptide-based ZnO quantum dots for in vivo bacteria diagnosis and treatment with high specificity [J]. Biomaterials, 2015, 53: 532-544.
[18] TEGGE W, GUERRA G, HOLTKE A, et al. Selective bacterial targeting and infection-triggered release of antibiotic colistin conjugates [J]. Angewandte Chemie International Edition, 2021, 60(33): 17989-17997.