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Houser BJ, Camacho AN, Bryner CA, Ziegler M, Wood JB, Spencer AJ, Gautam RP, Okonkwo TP, Wagner V, Smith SJ, Chesnel K, Harrison RG, Pitt WG. Bacterial Binding to Polydopamine-Coated Magnetic Nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 39420634 DOI: 10.1021/acsami.4c11169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2024]
Abstract
In medical infections such as blood sepsis and in food quality control, fast and accurate bacteria analysis is required. Using magnetic nanoparticles (MNPs) for bacterial capture and concentration is very promising for rapid analysis. When MNPs are functionalized with the proper surface chemistry, they have the ability to bind to bacteria and aid in the removal and concentration of bacteria from a sample for further analysis. This study introduces a novel approach for bacterial concentration using polydopamine (pDA), a highly adhesive polymer often purported to create antibacterial and antibiofouling coatings on medical devices. Although pDA has been generally studied for its ability to coat surfaces and reduce biofilm growth, we have found that when coated on magnetic nanoclusters (MNCs), more specifically iron oxide nanoclusters, it effectively binds to and can remove from suspension some types of bacteria. This study investigated the binding of pDA-coated MNCs (pDA-MNCs) to various Gram-negative and Gram-positive bacteria, including Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas aeruginosa, and several E. coli strains. MNCs were successfully coated with pDA, and these functionalized MNCs bound a wide variety of bacterial strains. The efficiency of removing bacteria from a suspension can range from 0.99 for S. aureus to 0.01 for an E. coli strain. Such strong capture and differential capture have important applications in collecting bacteria from dilute samples found in medical diagnostics, food and water quality monitoring, and other industries.
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Affiliation(s)
- Bowen J Houser
- Department of Chemical Engineering, Brigham Young University, Provo, Utah 84602, United States
| | - Alyson N Camacho
- Department of Chemical Engineering, Brigham Young University, Provo, Utah 84602, United States
| | - Camille A Bryner
- Department of Chemical Engineering, Brigham Young University, Provo, Utah 84602, United States
| | - Masa Ziegler
- Department of Chemical Engineering, Brigham Young University, Provo, Utah 84602, United States
| | - Justin B Wood
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Ashley J Spencer
- Department of Chemical Engineering, Brigham Young University, Provo, Utah 84602, United States
| | - Rajendra P Gautam
- Department of Physics and Astronomy, Brigham Young University, Provo, Utah 84602, United States
| | - Tochukwu P Okonkwo
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Victoria Wagner
- Department of Physics and Astronomy, Brigham Young University, Provo, Utah 84602, United States
| | - Stacey J Smith
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Karine Chesnel
- Department of Physics and Astronomy, Brigham Young University, Provo, Utah 84602, United States
| | - Roger G Harrison
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - William G Pitt
- Department of Chemical Engineering, Brigham Young University, Provo, Utah 84602, United States
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Zeng X, Wang Y, Shen X, Wang H, Xu ZL. Application of Matrix-Assisted Laser Desorption Ionization Time-of-Flight Mass Spectrometry for Identification of Foodborne Pathogens: Current Developments and Future Trends. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:22001-22014. [PMID: 39344132 DOI: 10.1021/acs.jafc.4c06552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/01/2024]
Abstract
Foodborne pathogens have gained sustained public attention, exerted significant pressure on food manufacturers, and posed serious health risks to human. Matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS) has been employed for quick and accurate identification of microorganisms in the prevention of foodborne epidemics in recent years. Herein, we first summarize the principle of MALDI and its workflow for foodborne pathogens. Subsequently, we review the recent progress and applications of MALDI-TOF MS in foodborne pathogen determination. Additionally, we outline the expanded utilization of MALDI-based techniques for the identification of closely related species. We also assess the current gaps and propose possible solutions to address the existing challenges. MALDI-TOF MS is a promising biotool for rapid and accurate identification of foodborne microbes at the species and genus level in food samples. Database expansion and direct quantification of spoilage microbes are two promising areas for future progress in MALDI-TOF MS applications.
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Affiliation(s)
- Xi Zeng
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, China
- Guangzhou Institute of Food Inspection, Guangzhou 511400, China
| | - Yu Wang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, China
- Guangzhou Institute of Food Inspection, Guangzhou 511400, China
| | - Xing Shen
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, China
| | - Hong Wang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, China
| | - Zhen-Lin Xu
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, China
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Zhong S, Mo F, Chen L, Qin W, Zhang L, Lu J, Sun D. AgAu-modified quasi-MIL-53 hybrid nanozymes with triple enzyme-like activities for boosting biocatalytic disinfection. J Colloid Interface Sci 2024; 661:520-532. [PMID: 38308892 DOI: 10.1016/j.jcis.2024.01.190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 01/06/2024] [Accepted: 01/26/2024] [Indexed: 02/05/2024]
Abstract
Metal-organic frameworks (MOFs) have great potential for combating pathogenic bacterial infections and are expected to become an alternative to antibiotics. However, organic linkers obstruct and saturate the inorganic nodes of MOF structures, making it challenging to utilize the applied potential of metal centers. Here, we combined controlled ligand decarboxylation with noble metal nanoparticles to rationally remodel MIL-53, resulting in a hybrid nanozyme (AgAu@QMIL-53, AAQM) with excellent multiple enzyme-like activities that both eradicate bacteria and promote diabetic wound healing. Specifically, benefitting from oxidase (OXD)-like and peroxidase (POD)-like activities, AAQM converts oxygen (O2) and hydrogen peroxide (H2O2) into superoxide anion radicals (O2-) and hydroxyl radicals (OH) to eradicate bacteria. In in vitro antibacterial experiments, AAQM exhibited favorable killing efficacy against Pseudomonas aeruginosa (P. aeruginosa) and methicillin-resistant Staphylococcus aureus (MRSA) (>99 %). Notably, due to its superoxide (SOD)-like activity and outstanding reactive nitrogen species (RNS) elimination capacity, AAQM can produce adequate O2 and alleviate oxidative stress in diabetic wounds. Benefiting from the rational modification of MIL-53, the synthesized hybrid nanozyme can effectively kill bacteria while alleviating oxidative stress and ultimately promote infected diabetic wound healing. Overall, this biomimetic enzyme-catalyzed strategy will bring enlightenment to the design of self-antibacterial agents for efficient disinfection and wound healing simultaneously.
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Affiliation(s)
- Sheng Zhong
- Guangdong Provincial Key Laboratory of Pharmaceutical Bioactive Substances, Key Specialty of Clinical Pharmacy, The First Affiliated Hospital, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou 510006, Guangdong, China
| | - Fayin Mo
- Guangdong Provincial Key Laboratory of Pharmaceutical Bioactive Substances, Key Specialty of Clinical Pharmacy, The First Affiliated Hospital, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou 510006, Guangdong, China
| | - Linxi Chen
- Guangdong Provincial Key Laboratory of Pharmaceutical Bioactive Substances, Key Specialty of Clinical Pharmacy, The First Affiliated Hospital, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou 510006, Guangdong, China
| | - Weiwei Qin
- Zhejiang Provincial Key Laboratory of Biometrology and Inspection & Quarantine, College of Life Sciences, China Jiliang University, Hangzhou 310018, Zhejiang, China
| | - Luyong Zhang
- Guangdong Provincial Key Laboratory of Pharmaceutical Bioactive Substances, Key Specialty of Clinical Pharmacy, The First Affiliated Hospital, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou 510006, Guangdong, China.
| | - Jing Lu
- National and Local United Engineering Lab of Druggability and New Drugs Evaluation, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, Guangdong, China.
| | - Duanping Sun
- Guangdong Provincial Key Laboratory of Pharmaceutical Bioactive Substances, Key Specialty of Clinical Pharmacy, The First Affiliated Hospital, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou 510006, Guangdong, China.
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