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Manceau M, Farre C, Lagarde F, Mathey R, Buhot A, Vidic J, Léguillier V, Hou Y, Chaix C. Investigation of the Affinity of Aptamers for Bacteria by Surface Plasmon Resonance Imaging Using Nanosomes. ACS APPLIED MATERIALS & INTERFACES 2024; 16:29645-29656. [PMID: 38809175 DOI: 10.1021/acsami.4c02355] [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: 05/30/2024]
Abstract
The cell-SELEX method enables efficient selection of aptamers that bind whole bacterial cells. However, after selection, it is difficult to determine their binding affinities using common screening methods because of the large size of the bacteria. Here we propose a simple surface plasmon resonance imaging method (SPRi) for aptamer characterization using bacterial membrane vesicles, called nanosomes, instead of whole cells. Nanosomes were obtained from membrane fragments after mechanical cell disruption in order to preserve the external surface epitopes of the bacterium used for their production. The study was conducted on Bacillus cereus (B. cereus), a Gram-positive bacterium commonly found in soil, rice, vegetables, and dairy products. Four aptamers and one negative control were initially grafted onto a biochip. The binding of B. cereus cells and nanosomes to immobilized aptamers was then compared. The use of nanosomes instead of cells provided a 30-fold amplification of the SPRi signal, thus allowing the selection of aptamers with higher affinities. Aptamer SP15 was found to be the most sensitive and selective for B. cereus ATCC14579 nanosomes. It was then truncated into three new sequences (SP15M, SP15S1, and SP15S2) to reduce its size while preserving the binding site. Fitting the results of the SPRi signal for B. cereus nanosomes showed a similar trend for SP15 and SP15M, and a slightly higher apparent association rate constant kon for SP15S2, which is the truncation with a high probability of a G-quadruplex structure. These observations were confirmed on nanosomes from B. cereus ATCC14579 grown in milk and from the clinical strain B. cereus J066. The developed method was validated using fluorescence microscopy on whole B. cereus cells and the SP15M aptamer labeled with a rhodamine. This study showed that nanosomes can successfully mimic the bacterial membrane with great potential for facilitating the screening of specific ligands for bacteria.
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Affiliation(s)
- Mathilde Manceau
- Université Claude Bernard Lyon 1, CNRS, ISA, UMR5280, 69100 Villeurbanne, France
| | - Carole Farre
- Université Claude Bernard Lyon 1, CNRS, ISA, UMR5280, 69100 Villeurbanne, France
| | - Florence Lagarde
- Université Claude Bernard Lyon 1, CNRS, ISA, UMR5280, 69100 Villeurbanne, France
| | - Raphaël Mathey
- Université Grenoble Alpes, CEA, CNRS, Grenoble INP, IRIG, SyMMES, 38000 Grenoble, France
| | - Arnaud Buhot
- Université Grenoble Alpes, CEA, CNRS, Grenoble INP, IRIG, SyMMES, 38000 Grenoble, France
| | - Jasmina Vidic
- Université Paris-Saclay, INRAE, AgroParisTech, UMR 1319, Micalis Institute, 78350 Jouy-en-Josas, France
| | - Vincent Léguillier
- Université Paris-Saclay, INRAE, AgroParisTech, UMR 1319, Micalis Institute, 78350 Jouy-en-Josas, France
| | - Yanxia Hou
- Université Grenoble Alpes, CEA, CNRS, Grenoble INP, IRIG, SyMMES, 38000 Grenoble, France
| | - Carole Chaix
- Université Claude Bernard Lyon 1, CNRS, ISA, UMR5280, 69100 Villeurbanne, France
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Spasovski V, Romolo A, Zagorc U, Arrigler V, Kisovec M, Bedina Zavec A, Arko M, Molnár A, Schlosser G, Iglič A, Kogej K, Kralj-Iglič V. Characterization of Nanohybridosomes from Lipids and Spruce Homogenate Containing Extracellular Vesicles. Int J Nanomedicine 2024; 19:1709-1721. [PMID: 38410418 PMCID: PMC10896108 DOI: 10.2147/ijn.s432836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 12/15/2023] [Indexed: 02/28/2024] Open
Abstract
Introduction Lipid nanovesicles associated with bioactive phytochemicals from spruce needle homogenate (here called nano-sized hybridosomes or nanohybridosomes, NSHs) were considered. Methods We formed NSHs by mixing appropriate amounts of lecithin, glycerol and supernatant of isolation of extracellular vesicles from spruce needle homogenate. We visualized NSHs by light microscopy and cryogenic transmission electron microscopy and assessed them by flow cytometry, dynamic light scattering, ultraviolet-visual spectroscopy, interferometric light microscopy and liquid chromatography-mass spectrometry. Results We found that the particles consisted of a bilayer membrane and a fluid-like interior. Flow cytometry and interferometric light microscopy measurements showed that the majority of the particles were nano-sized. Dynamic light scattering and interferometric light microscopy measurements agreed well on the average hydrodynamic radius of the particles Rh (between 140 and 180 nm), while the concentrations of the particles were in the range between 1013 and 1014/mL indicating that NSHs present a considerable (more than 25%) of the sample which is much more than the yield of natural extracellular vesicles (EVs) from spruce needle homogenate (estimated less than 1%). Spruce specific lipids and proteins were found in hybridosomes. Discussion Simple and low-cost preparation method, non-demanding saving process and efficient formation procedure suggest that large-scale production of NSHs from lipids and spruce needle homogenate is feasible.
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Affiliation(s)
- Vesna Spasovski
- University of Ljubljana, Faculty of Health Sciences, Laboratory of Clinical Biophysics, Ljubljana, Slovenia
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Anna Romolo
- University of Ljubljana, Faculty of Health Sciences, Laboratory of Clinical Biophysics, Ljubljana, Slovenia
- University of Ljubljana, Faculty of Electrical Engineering, Laboratory of Physics, Ljubljana, Slovenia
| | - Urška Zagorc
- University of Ljubljana, Faculty of Chemistry and Chemical Technology, Ljubljana, Slovenia
| | - Vesna Arrigler
- University of Ljubljana, Faculty of Chemistry and Chemical Technology, Ljubljana, Slovenia
| | - Matic Kisovec
- National Institute of Chemistry, Department of Molecular Biology and Nanobiotechnology, Ljubljana, Slovenia
| | - Apolonija Bedina Zavec
- National Institute of Chemistry, Department of Molecular Biology and Nanobiotechnology, Ljubljana, Slovenia
| | - Matevž Arko
- University of Ljubljana, Faculty of Health Sciences, Laboratory of Clinical Biophysics, Ljubljana, Slovenia
| | - Adrienn Molnár
- Hevesy György PhD School of Chemistry, ELTE Eötvös Loránd University, Budapest, Hungary
- MTA-ELTE Lendület Ion Mobility Mass Spectrometry Research Group, Faculty of Science, Institute of Chemistry, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Gitta Schlosser
- MTA-ELTE Lendület Ion Mobility Mass Spectrometry Research Group, Faculty of Science, Institute of Chemistry, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Aleš Iglič
- University of Ljubljana, Faculty of Electrical Engineering, Laboratory of Physics, Ljubljana, Slovenia
- University of Ljubljana, Faculty of Medicine, Laboratory of Clinical Biophysics, Ljubljana, Slovenia
| | - Ksenija Kogej
- University of Ljubljana, Faculty of Chemistry and Chemical Technology, Ljubljana, Slovenia
| | - Veronika Kralj-Iglič
- University of Ljubljana, Faculty of Health Sciences, Laboratory of Clinical Biophysics, Ljubljana, Slovenia
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Marquez CA, Oh CI, Ahn G, Shin WR, Kim YH, Ahn JY. Synergistic vesicle-vector systems for targeted delivery. J Nanobiotechnology 2024; 22:6. [PMID: 38167116 PMCID: PMC10763086 DOI: 10.1186/s12951-023-02275-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 12/14/2023] [Indexed: 01/05/2024] Open
Abstract
With the immense progress in drug delivery systems (DDS) and the rise of nanotechnology, challenges such as target specificity remain. The vesicle-vector system (VVS) is a delivery system that uses lipid-based vesicles as vectors for a targeted drug delivery. When modified with target-probing materials, these vesicles become powerful vectors for drug delivery with high target specificity. In this review, we discuss three general types of VVS based on different modification strategies: (1) vesicle-probes; (2) vesicle-vesicles; and (3) genetically engineered vesicles. The synthesis of each VVS type and their corresponding properties that are advantageous for targeted drug delivery, are also highlighted. The applications, challenges, and limitations of VVS are briefly examined. Finally, we share a number of insights and perspectives regarding the future of VVS as a targeted drug delivery system at the nanoscale.
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Affiliation(s)
- Christine Ardelle Marquez
- Department of Microbiology, Chungbuk National University, 1 Chungdae-Ro, Seowon-Gu, Cheongju, 28644, Republic of Korea
| | - Cho-Im Oh
- Department of Microbiology, Chungbuk National University, 1 Chungdae-Ro, Seowon-Gu, Cheongju, 28644, Republic of Korea
| | - Gna Ahn
- Department of Microbiology, Chungbuk National University, 1 Chungdae-Ro, Seowon-Gu, Cheongju, 28644, Republic of Korea
- Center for Ecology and Environmental Toxicology, Chungbuk National University, Cheongju, 28644, Republic of Korea
| | - Woo-Ri Shin
- Department of Microbiology, Chungbuk National University, 1 Chungdae-Ro, Seowon-Gu, Cheongju, 28644, Republic of Korea
- Department of Bioengineering, University of Pennsylvania, 210 S 33rd St, Philadelphia, PA, 19104, USA
| | - Yang-Hoon Kim
- Department of Microbiology, Chungbuk National University, 1 Chungdae-Ro, Seowon-Gu, Cheongju, 28644, Republic of Korea.
- Center for Ecology and Environmental Toxicology, Chungbuk National University, Cheongju, 28644, Republic of Korea.
| | - Ji-Young Ahn
- Department of Microbiology, Chungbuk National University, 1 Chungdae-Ro, Seowon-Gu, Cheongju, 28644, Republic of Korea.
- Center for Ecology and Environmental Toxicology, Chungbuk National University, Cheongju, 28644, Republic of Korea.
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Le H, Dé E, Le Cerf D, Karakasyan C. Using Targeted Nano-Antibiotics to Improve Antibiotic Efficacy against Staphylococcus aureus Infections. Antibiotics (Basel) 2023; 12:1066. [PMID: 37370385 DOI: 10.3390/antibiotics12061066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Revised: 06/15/2023] [Accepted: 06/16/2023] [Indexed: 06/29/2023] Open
Abstract
The poor bioavailability of antibiotics at infection sites is one of the leading causes of treatment failure and increased bacterial resistance. Therefore, developing novel, non-conventional antibiotic delivery strategies to deal with bacterial pathogens is essential. Here, we investigated the encapsulation of two fluoroquinolones, ciprofloxacin and levofloxacin, into polymer-based nano-carriers (nano-antibiotics), with the goal of increasing their local bioavailability at bacterial infection sites. The formulations were optimized to achieve maximal drug loading. The surfaces of nano-antibiotics were modified with anti-staphylococcal antibodies as ligand molecules to target S. aureus pathogens. The interaction of nano-antibiotics with the bacterial cells was investigated via fluorescent confocal microscopy. Conventional tests (MIC and MBC) were used to examine the antibacterial properties of nano-antibiotic formulations. Simultaneously, a bioluminescence assay model was employed, revealing the rapid and efficient assessment of the antibacterial potency of colloidal systems. In comparison to the free-form antibiotic, the targeted nano-antibiotic exhibited enhanced antimicrobial activity against both the planktonic and biofilm forms of S. aureus. Furthermore, our data suggested that the efficacy of a targeted nano-antibiotic treatment can be influenced by its antibiotic release profile.
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Affiliation(s)
- Hung Le
- Sciences & Technic Faculty, Univ Rouen Normandie, INSA Rouen Normandie, CNRS, PBS UMR 6270, 76000 Rouen, France
| | - Emmanuelle Dé
- Sciences & Technic Faculty, Univ Rouen Normandie, INSA Rouen Normandie, CNRS, PBS UMR 6270, 76000 Rouen, France
| | - Didier Le Cerf
- Sciences & Technic Faculty, Univ Rouen Normandie, INSA Rouen Normandie, CNRS, PBS UMR 6270, 76000 Rouen, France
| | - Carole Karakasyan
- Sciences & Technic Faculty, Univ Rouen Normandie, INSA Rouen Normandie, CNRS, PBS UMR 6270, 76000 Rouen, France
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