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Blanchard T, Hoummady S, Roche M, Banuls D, Bynens A, Meunier M, Djerene M, Dos Santos N, Tissaoui E, Rouch-Buck P, Fantinati M, Priymenko N. Prevalence and factors associated with overweight and obesity in dogs presenting to French university veterinary teaching hospitals during the COVID-19 pandemic. Top Companion Anim Med 2024; 60:100875. [PMID: 38631428 DOI: 10.1016/j.tcam.2024.100875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 02/20/2024] [Accepted: 04/11/2024] [Indexed: 04/19/2024]
Abstract
Pet obesity is still a major health issue, which is considered an epidemic by some researchers. Prevention is one of the cornerstones of veterinary care, emphasizing the importance of proactive measures. Human lifestyle was affected during the COVID-19 pandemic, resulting in an increased overweight prevalence in the population. The prevalence of overweight and obesity in dogs during this period has been poorly explored. This study's objectives were to assess the percentage of the French dog population with overweight and obesity, compare the results with a study conducted before the COVID-19 pandemic, and investigate any potential changes in the risk factors. The study collected data through a survey completed by dog owners during their pets' vaccination visits at university veterinary hospitals of Maisons-Alfort (Paris) and Toulouse, in France, between 2020 and 2022. The veterinarian recorded the dog's weight and the body condition score using a 9-point scale. The study included a total of 309 dogs. Of these, 1.6 % were underweight, 63.1 % had an ideal body condition, and 35.3 % were overweight, including 2.3 % of all dogs classified as obese. During the pandemic, French dog diets shifted towards increased commercial food consumption and twice-daily feedings compared to a 2003 study. Factors positively associated with overweight were being female (OR = 3.55; 95 % CI: 1.65-8.01; P=0.002), being senior (OR=4.91; 95 % CI: 2.07-12.2; P<0.001) or geriatric (OR=5.81; 95 % CI: 2.04-17.0; P=0.001) and having an owner underestimating dog's body condition (OR=74.1; 95 % CI: 29.8-215; P<0.001). Recognizing the impact of owner perception enables early intervention strategies, such as educating owners during consultations and conducting teaching sessions at the clinic. This proactive approach could contribute to improved health outcomes and help prevent the onset of obesity-related issues in dogs. The new trends in dogs' diets may have global relevance due to the pandemic's widespread impact. Although no immediate impact on overweight is evident, ongoing research is crucial to understand the pandemic's long-term effects.
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Affiliation(s)
- T Blanchard
- Ecole Nationale Vétérinaire de Toulouse ENVT, Toulouse, France.
| | - S Hoummady
- Ecole Nationale Vétérinaire d'Alfort ENVA, Maisons-Alfort, France
| | - M Roche
- Ecole Nationale Vétérinaire de Toulouse ENVT, Toulouse, France
| | - D Banuls
- Ecole Nationale Vétérinaire de Toulouse ENVT, Toulouse, France
| | - A Bynens
- Chats, Oiseaux et autres animaux familiers, Fédération des Fabricants d'Aliments pour Chiens, FACCO, Paris, France
| | - M Meunier
- Hill's Pet Nutrition France, Sophia Antipolis, France
| | - M Djerene
- Ecole Nationale Vétérinaire d'Alfort ENVA, Maisons-Alfort, France
| | - N Dos Santos
- Ecole Nationale Vétérinaire d'Alfort ENVA, Maisons-Alfort, France
| | - E Tissaoui
- Ecole Nationale Vétérinaire d'Alfort ENVA, Maisons-Alfort, France
| | - P Rouch-Buck
- Ecole Nationale Vétérinaire de Toulouse ENVT, Toulouse, France
| | - M Fantinati
- Hill's Pet Nutrition France, Sophia Antipolis, France
| | - N Priymenko
- Ecole Nationale Vétérinaire de Toulouse ENVT, Toulouse, France; INRAE, ENVT, TOXALIM, Université de Toulouse, Toulouse, France
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2
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Agiotis L, De Lille VT, Meunier M. Influence of photothermal and plasma-mediated nano-processes on fluence thresholds for ultrafast laser-induced cavitation around gold nanoparticles. Nanoscale Adv 2023; 5:6887-6896. [PMID: 38059026 PMCID: PMC10696957 DOI: 10.1039/d3na00743j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Accepted: 10/20/2023] [Indexed: 12/08/2023]
Abstract
Laser fluence thresholds of ultrafast excitation of vapor bubbles around gold nanoparticles are determined experimentally. An optical scattering technique of limited minimum bubble size resolution is employed and analyzed for that purpose. Measurements were performed for spherical gold nanoparticles of varying sizes (40-200 nm) and for laser pulses of varying pulse width (55 fs to 4.3 ps) to estimate the limits where the evaluated thresholds are attributed to either plasma-mediated or photothermal cavitation. Furthermore, thresholds were obtained by double 55 fs pulsed excitation (varying delay 0.0-4.3 ps), providing insights into the dynamics of the excited plasma. A relationship is established between particle properties, (size, near-field amplification factor, and absorption efficiency) and the crossover pulse width of the transition from plasma-mediated to photothermal cavitation. Further, by comparing theory and experiments, we examine the approximative optical breakdown density of ∼10-21 cm-3 at a distance of 1-2 nm from the particle surface as a criterion of plasma-mediated cavitation around gold nanoparticles in analogy to the spinodal criterion for photothermal cavitation. For a given pulse width, the breakdown density appears to be nearly size-independent, establishing the aforesaid criterion applicable. However, a small pulse width dependence of the breakdown density is still observed. Based on these criteria, a comparison is further provided between theoretical thresholds of cavitation and the ones of detectable bubbles. An increasing discrepancy is observed between them with decreasing size for the case of photothermal cavitation. For plasma-mediated cavitation, the latter discrepancy is seemingly smaller, presumably due to the highly nonlinear nature of the process.
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Affiliation(s)
- Leonidas Agiotis
- Department of Engineering Physics, Polytechnique Montréal Montreal QC H3C 3A7 Canada
| | - Vi Tching De Lille
- Department of Engineering Physics, Polytechnique Montréal Montreal QC H3C 3A7 Canada
| | - Michel Meunier
- Department of Engineering Physics, Polytechnique Montréal Montreal QC H3C 3A7 Canada
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3
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Uzel A, Agiotis L, Baron A, Zhigaltsev IV, Cullis PR, Hasanzadeh Kafshgari M, Meunier M. Single Pulse Nanosecond Laser-Stimulated Targeted Delivery of Anti-Cancer Drugs from Hybrid Lipid Nanoparticles Containing 5 nm Gold Nanoparticles. Small 2023; 19:e2305591. [PMID: 37936336 DOI: 10.1002/smll.202305591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 10/19/2023] [Indexed: 11/09/2023]
Abstract
Encapsulating chemotherapeutic drugs like doxorubicin (DOX) inside lipid nanoparticles (LNPs) can overcome their acute, systematic toxicity. However, a precise drug release at the tumor microenvironment for improving the maximum tolerated dose and reducing side effects has yet to be well-established by implementing a safe stimuli-responsive strategy. This study proposes an integrated nanoscale perforation to trigger DOX release from hybrid plasmonic multilamellar LNPs composed of 5 nm gold (Au) NPs clustered at the internal lamellae interfaces. To promote site-specific DOX release, a single pulse irradiation strategy is developed by taking advantage of the resonant interaction between nanosecond pulsed laser radiation (527 nm) and the plasmon mode of the hybrid nanocarriers. This approach enlarges the amount of DOX in the target cells up to 11-fold compared to conventional DOX-loaded LNPs, leading to significant cancer cell death. The simulation of the pulsed laser interactions of the hybrid nanocarriers suggests a release mechanism mediated by either explosive vaporization of thin water layers adjacent to AuNP clusters or thermo-mechanical decomposition of overheated lipid layers. This simulation indicates an intact DOX integrity following irradiation since the temperature distribution is highly localized around AuNP clusters and highlights a controlled light-triggered drug delivery system.
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Affiliation(s)
- Antoine Uzel
- Department of Engineering Physics, Polytechnique Montréal, Montreal, QC, H3C 3A7, Canada
| | - Leonidas Agiotis
- Department of Engineering Physics, Polytechnique Montréal, Montreal, QC, H3C 3A7, Canada
| | - Amélie Baron
- Department of Engineering Physics, Polytechnique Montréal, Montreal, QC, H3C 3A7, Canada
| | - Igor V Zhigaltsev
- Department of Biochemistry and Molecular Biology, University of British Columbia, 2350 Health Sciences Mall, Vancouver, BC, V6T 1Z3, Canada
| | - Pieter R Cullis
- Department of Biochemistry and Molecular Biology, University of British Columbia, 2350 Health Sciences Mall, Vancouver, BC, V6T 1Z3, Canada
| | | | - Michel Meunier
- Department of Engineering Physics, Polytechnique Montréal, Montreal, QC, H3C 3A7, Canada
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4
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Hogue J, Cusson P, Meunier M, Seletskiy DV, Reuter S. Sensitive detection of electric field-induced second harmonic signals. Opt Lett 2023; 48:4601-4604. [PMID: 37656565 DOI: 10.1364/ol.492443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 08/09/2023] [Indexed: 09/03/2023]
Abstract
We demonstrate sensitive electric field measurements by coherent homodyne amplification of the electric field induced second harmonic generation (E-FISH) technique. In the process of E-FISH, an applied electric field breaks the centrosymmetry of an otherwise homogeneous medium, in turn promoting the generation of the second harmonic frequency of an incident field. Due to weak third-order hyperpolarizability and the requirement of an applied field to break the symmetry, the E-FISH technique has been mainly used to study high fields, also requiring a strong optical field and sensitive detection. Here we superimpose the E-FISH signal with an auxiliary beam, also termed a local oscillator (LO), at double the incident frequency. Coherent superposition of the LO and the E-FISH output (LOE-FISH) allows for a homodyne amplification of the otherwise weak nonlinear signal. We have demonstrated an increase of signal-to-noise by a factor of seven, which results in a measurement time reduction of a factor of 49. This technique, LOE-FISH, has a number of advantages: detection with intensified detectors is not required. Furthermore, instead of millijoule pulsed lasers, we can work with microjoule pulsed lasers, which allows measuring at repetition rates of megahertz and opens single shot and real-time capability. The LOE-FISH technique increases in sensitivity at lower electric field values. Our work is a demonstration of the principle. Already with our first results from the demonstration, one can see the high potential of LOE-FISH.
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Dégardin M, Liberelle B, Oliverio R, Baniahmad SF, Darviot C, Largillière I, Henry O, Durocher Y, Banquy X, Meunier M, De Crescenzo G. Coiled-Coil-Based Biofunctionalization of 100 nm Gold Nanoparticles with the Trastuzumab Antibody for the Detection of HER2-Positive Cancer Cells. Langmuir 2023; 39:12235-12247. [PMID: 37581531 DOI: 10.1021/acs.langmuir.3c01621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/16/2023]
Abstract
We compared different biofunctionalization strategies for immobilizing trastuzumab, an IgG targeting the HER2 biomarker, onto 100 nm spherical gold nanoparticles because of the E/K coiled-coil peptide heterodimer. First, Kcoil peptides were grafted onto the gold surface while their Ecoil partners were genetically encoded at the C-terminus of trastuzumab's Fc region, allowing for a strong and specific interaction between the antibodies and the nanoparticles. Gold nanoparticles with no Kcoil peptides on their surface were also produced to immobilize Ecoil-tagged trastuzumab antibodies via the specific adsorption of their negatively charged Ecoil tags on the positively charged gold surface. Finally, the nonspecific adsorption of wild-type trastuzumab on the gold surface was also assessed, with and without Kcoil peptides grafted on it beforehand. We developed a thorough workflow to systematically compare the immobilization strategies regarding the stability of nanoparticles, antibody coverage, and ability to specifically bind to HER2-positive breast cancer cells. All nanoparticles were highly monodisperse and retained their localized surface plasmon resonance properties after biofunctionalization. A significant increase in the amount of immobilized antibodies was observed with the two oriented coil-based strategies compared to nonspecific adsorption. Finally, all biofunctionalization strategies allowed for the detection of HER2-positive breast cancer cells, but among the investigated approaches, we recommend using the E/K coiled-coil-based strategy for gold nanoparticle biofunctionalization because it allows for the qualitative and quantitative detection of HER2-positive cells with a higher contrast compared to HER2-negative cells.
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Affiliation(s)
- Médéric Dégardin
- Department of Chemical Engineering, Polytechnique Montréal, H3T 1J4 Montréal, Québec, Canada
- Laser Processing and Plasmonics Laboratory (LP2L), Department of Engineering Physics, Polytechnique Montréal, H3T 1J4 Montréal, Québec, Canada
| | - Benoit Liberelle
- Department of Chemical Engineering, Polytechnique Montréal, H3T 1J4 Montréal, Québec, Canada
| | - Romane Oliverio
- Department of Chemical Engineering, Polytechnique Montréal, H3T 1J4 Montréal, Québec, Canada
- Faculty of Pharmacy, Axe Formulation et Analyse du Médicament (AFAM), Université de Montréal, H3T 1J4 Montréal, Québec, Canada
| | - Seyed Farzad Baniahmad
- Human Health Therapeutics Research Centre, National Research Council of Canada, Building Montréal-Royalmount, H4P 2R2 Montréal, Québec, Canada
| | - Cécile Darviot
- Laser Processing and Plasmonics Laboratory (LP2L), Department of Engineering Physics, Polytechnique Montréal, H3T 1J4 Montréal, Québec, Canada
| | - Isabelle Largillière
- Laser Processing and Plasmonics Laboratory (LP2L), Department of Engineering Physics, Polytechnique Montréal, H3T 1J4 Montréal, Québec, Canada
| | - Olivier Henry
- Department of Chemical Engineering, Polytechnique Montréal, H3T 1J4 Montréal, Québec, Canada
| | - Yves Durocher
- Human Health Therapeutics Research Centre, National Research Council of Canada, Building Montréal-Royalmount, H4P 2R2 Montréal, Québec, Canada
| | - Xavier Banquy
- Faculty of Pharmacy, Axe Formulation et Analyse du Médicament (AFAM), Université de Montréal, H3T 1J4 Montréal, Québec, Canada
| | - Michel Meunier
- Laser Processing and Plasmonics Laboratory (LP2L), Department of Engineering Physics, Polytechnique Montréal, H3T 1J4 Montréal, Québec, Canada
| | - Gregory De Crescenzo
- Department of Chemical Engineering, Polytechnique Montréal, H3T 1J4 Montréal, Québec, Canada
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6
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Zapata-Farfan J, Kafshgari MH, Patskovsky S, Meunier M. Dynamic multispectral detection of bacteria with nanoplasmonic markers. Nanoscale 2023; 15:3309-3317. [PMID: 36625354 DOI: 10.1039/d2nr03047k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Culture-based diagnosis of bacterial diseases is a time-consuming technique that can lead not only to antibiotic resistance or bacterial mutation but also to fast-spreading diseases. Such mutations contribute to the fast deterioration of the patient's health and in some cases the death depending on the complexity of the infection. There is great interest in developing widely available molecular-level diagnostics that provide accurate and rapid diagnosis at the individual level and that do not require sophisticated analysis or expensive equipment. Here, we present a promising analytical approach to detect the presence of pathogenic bacteria based on their dynamic properties enhanced with nanoplasmonic biomarkers. These markers have shown greater photostability and biocompatibility compared to fluorescent markers and quantum dots, and serve as both a selective marker and an amplifying agent in optical biomedical detection. We show that a simple dark-field side- illumination technique can provide sufficiently high-contrast dynamic images of individual plasmonic nanoparticles attached to Escherichia coli (E. coli) for multiplex biodetection. Combined with numerical dynamic filtering, our proposed system shows great potential for the deployment of portable commercial devices for rapid diagnostic tests available to physicians in emergency departments, clinics and public hospitals as point-of-care devices.
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Affiliation(s)
- Jennyfer Zapata-Farfan
- Department of Engineering Physics, Polytechnique Montréal, Montréal, Québec, H3C 3A7, Canada.
| | | | - Sergiy Patskovsky
- Department of Engineering Physics, Polytechnique Montréal, Montréal, Québec, H3C 3A7, Canada.
| | - Michel Meunier
- Department of Engineering Physics, Polytechnique Montréal, Montréal, Québec, H3C 3A7, Canada.
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7
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Boira C, Meunier M, Bracq M, Maramaldi G, Scandolera A, Reynaud R. 608 The historical efficacy of Centella asiatica on stretchmarks demonstrated. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.09.625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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8
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Meunier M, Chapuis E, Humeau A, Lambert C, Auriol D, Scandolera A, Reynaud R. 523 Targeting SDF-1 as an efficient strategy to resolve skin hyperpigmentation issues with Himanthalia elongata extract. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.09.538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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9
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Meunier M, Chapuis E, Godbille S, Brooks J, Carolan H, Lambert C, Sennelier B, Scandolera A, Reynaud R. 249 Reduction of scalp dryness and white flakes production for emotional improvement. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.09.260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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10
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Agiotis L, Meunier M. Nonlinear thermal lensing of high repetition rate ultrafast laser light in plasmonic nano-colloids. Nanophotonics 2022; 11:1051-1062. [PMID: 35879969 PMCID: PMC8997721 DOI: 10.1515/nanoph-2021-0775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Revised: 01/06/2022] [Accepted: 01/07/2022] [Indexed: 06/15/2023]
Abstract
We report on experimental observations of phenomenological self-trapping in plasmonic colloids of varying plasmon peaks in the visible/near infrared. A femtosecond (fs) oscillator is used in both pulsed (35 fs, 76 MHz) and continuous wave (cw) operation for comparison. We show that for both modes and for all examined colloids (and under typically applied external focusing conditions in self-trapping studies in colloidal media) nonlinear propagation is governed by thermal defocusing of the focused beam, which precedes the steady-state regime reached by particle diffusion, even far from the plasmon resonance (or equivalently for non-plasmonic colloids, even for low absorption coefficients). A strategy for the utilization of high repetition fs pulses to mitigate thermal lensing and promote gradient force-induced self-trapping is discussed. Notably, nonlinear thermal lensing is further accompanied by natural convection due to the horizontal configuration of the setup. Under resonant illumination, for both fs and cw cases, we observe mode break-up of the beam profile, most likely due to azimuthal modulation instability. Importantly, time-resolved observations of the break-up indicate that in the fs case, thermal convection heat transfer is reduced in magnitude and significantly decoupled in time from thermal conduction, presumably due to temperature increase confinement near the particles. We anticipate that our findings will trigger interest toward the use of high repetition fs pulses for self-channeling applications in nano-colloids.
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Affiliation(s)
- Leonidas Agiotis
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, C.P. 6079, succ. Centre-ville, Montréal, QC, H3C 3A7, Canada
| | - Michel Meunier
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, C.P. 6079, succ. Centre-ville, Montréal, QC, H3C 3A7, Canada
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Wang L, Patskovsky S, Gauthier-Soumis B, Meunier M. Porous Au-Ag Nanoparticles from Galvanic Replacement Applied as Single-Particle SERS Probe for Quantitative Monitoring. Small 2022; 18:e2105209. [PMID: 34761520 DOI: 10.1002/smll.202105209] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Revised: 09/30/2021] [Indexed: 06/13/2023]
Abstract
Plasmonic nanostructures have raised the interest of biomedical applications of surface-enhanced Raman scattering (SERS). To improve the enhancement and produce sensitive SERS probes, porous Au-Ag alloy nanoparticles (NPs) are synthesized by dealloying Au-Ag alloy NP-precursors with Au or Ag core in aqueous colloidal environment through galvanic replacement reaction. The novel designed core-shell Au-Ag alloy NP-precursors facilitate controllable synthesis of porous nanostructure, and dealloying degree during the reaction has significant effect on structural and spectral properties of dealloyed porous NPs. Narrow-dispersed dealloyed NPs are obtained using NPs of Au/Ag ratio from 10/90 to 40/60 with Au and Ag core to produce solid core@porous shell and porous nanoshells, having rough surface, hollowness, and porosity around 30-60%. The clean nanostructure from colloidal synthesis exhibits a redshifted plasmon peak up to near-infrared region, and the large accessible surface induces highly localized surface plasmon resonance and generates robust SERS activity. Thus, the porous NPs produce intensely enhanced Raman signal up to 68-fold higher than 100 nm AuNP enhancement at single-particle level, and the estimated Raman enhancement around 7800, showing the potential for highly sensitive SERS probes. The single-particle SERS probes are effectively demonstrated in quantitative monitoring of anticancer drug Doxorubicin release.
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Affiliation(s)
- Lu Wang
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, C.P. 6079, Succ. Centre-ville, Montréal, Québec, H3C 3A7, Canada
| | - Sergiy Patskovsky
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, C.P. 6079, Succ. Centre-ville, Montréal, Québec, H3C 3A7, Canada
| | - Bastien Gauthier-Soumis
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, C.P. 6079, Succ. Centre-ville, Montréal, Québec, H3C 3A7, Canada
| | - Michel Meunier
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, C.P. 6079, Succ. Centre-ville, Montréal, Québec, H3C 3A7, Canada
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Wang L, Patskovsky S, Gauthier-Soumis B, Meunier M. Porous Au-Ag Nanoparticles from Galvanic Replacement Applied as Single-Particle SERS Probe for Quantitative Monitoring. Small 2022; 18:e2107532. [PMID: 34985198 DOI: 10.1002/smll.202107532] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
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13
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Agiotis L, Meunier M. Femtosecond nearly resonant self-focusing in gold nanorod colloids. Opt Express 2021; 29:39536-39548. [PMID: 34809316 DOI: 10.1364/oe.441117] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Accepted: 10/16/2021] [Indexed: 06/13/2023]
Abstract
We evaluate the threshold power for self-focusing in gold nanorod colloids of varying concentration by a power limiting method in the femtosecond filamentation regime. The pulses are tuned near the longitudinal plasmon peak of the nanorods, leading to saturation of linear absorption and reshaping of the particles. We evaluated the last two effects by optical transmission measurements and spectroscopic analysis and estimated that considerable particle deformation does not occur before the collapse of the beam. We performed numerical simulations based on the experimental results, and evaluated only a subtle, monotonically increasing enhancement of the nonlinear refractive index of the host material (water) as the nanoparticles concentration increases. The role of higher-order contributions is discussed. Our work provides an alternative characterization approach of ultrafast nonlinearities in absorbing media. It further emphasizes that self-focusing of intense femtosecond pulses in gold nanocomposites is hampered by the ultrafast modulation of the susceptibility of the metal.
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Hasanzadeh Kafshgari M, Agiotis L, Largillière I, Patskovsky S, Meunier M. Antibody-Functionalized Gold Nanostar-Mediated On-Resonance Picosecond Laser Optoporation for Targeted Delivery of RNA Therapeutics. Small 2021; 17:e2007577. [PMID: 33783106 DOI: 10.1002/smll.202007577] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 03/01/2021] [Indexed: 06/12/2023]
Abstract
The rapid advances of genetic and genomic technology indicate promising therapeutic potential of genetic materials for regulating abnormal gene expressions causing diseases and disorders. However, targeted intracellular delivery of RNA therapeutics still remains a major challenge hindering the clinical translation. In this study, an elaborated plasmonic optoporation approach is proposed to efficiently and selectively transfect specific cells. The site-specific optoporation is obtained by tuning the spectral range of a supercontinuum pulsed picosecond laser in order for each individual cell binding gold nanostar with their unique resonance peak to magnify the local field strength in the near-infrared region and facilitate a selective delivery of small interfering RNA, messenger RNA, and Cas9-ribonucleoprotein into human retinal pigment epithelial cells. Numerical simulations indicate that optoporation is not due to a plasma-mediated process but rather due to a highly localized temperature rise both in time (few nanoseconds) and space (few nanometers). Taking advantage of the numerical simulation and fine-tuning of the optical strategy, the perforated lipid bilayer of targeted cells undergoes a membrane recovery process, important to retain their viability. The results signify the prospects of antibody functionalized nanostar-mediated optoporation as a simple and realistic gene delivery approach for future clinical practices.
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Affiliation(s)
| | - Leonidas Agiotis
- Department of Engineering Physics, Polytechnique Montreal, Montreal, QC, H3C3A7, Canada
| | - Isabelle Largillière
- Department of Engineering Physics, Polytechnique Montreal, Montreal, QC, H3C3A7, Canada
| | - Sergiy Patskovsky
- Department of Engineering Physics, Polytechnique Montreal, Montreal, QC, H3C3A7, Canada
| | - Michel Meunier
- Department of Engineering Physics, Polytechnique Montreal, Montreal, QC, H3C3A7, Canada
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15
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Jiang Y, Wang L, Meunier M, Mirsaidov U. Formation Pathways of Porous Alloy Nanoparticles through Selective Chemical and Electrochemical Etching. Small 2021; 17:e2006953. [PMID: 33719189 DOI: 10.1002/smll.202006953] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 01/13/2021] [Indexed: 06/12/2023]
Abstract
Porous alloy nanomaterials are important for applications in catalysis, sensing, and actuation. Chemical and electrochemical etching are two methods to form porous nanostructures by dealloying bimetallic nanoparticles (NPs). However, it is not clear how the NPs evolve during these etching processes. Insight into the morphological and compositional transformations of the NPs during the etching is critical to understanding the nanoscale details of the dealloying process. Here, using in situ liquid phase transmission electron microscopy, the structural evolution of individual AuAg alloy NPs is tracked during both chemical and electrochemical etching of their Ag component. The observations show that the electrochemical etching produces NPs with more uniform pore sizes than the chemical etching and enables tuning the NPs porosity by modulating the electrochemical potential. The results show that at the initial stages of both etching methods, Au-rich passivation layer forms on the surface of the NPs, which is critical in preserving the NP's porous shell as pores form underneath this layer during the etching. These findings describing the selective etching and dealloying of AuAg NPs provide a critical insight needed to control the morphology and composition of porous multimetallic NPs, and paves the way for synthesizing nanomaterials with tailored chemical and physical properties for various applications.
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Affiliation(s)
- Yingying Jiang
- Department of Physics, National University of Singapore, Singapore, 117551, Singapore
- Centre for BioImaging Sciences, Department of Biological Sciences, National University of Singapore, Singapore, 117557, Singapore
| | - Lu Wang
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, Montréal, QC, H3C 3AT, Canada
| | - Michel Meunier
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, Montréal, QC, H3C 3AT, Canada
| | - Utkur Mirsaidov
- Department of Physics, National University of Singapore, Singapore, 117551, Singapore
- Centre for BioImaging Sciences, Department of Biological Sciences, National University of Singapore, Singapore, 117557, Singapore
- Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, Singapore, 117546, Singapore
- Department of Materials Science and Engineering, National University of Singapore, Singapore, 117575, Singapore
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16
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Tran DH, Meunier M, Cheriet F. OrgaNet: A Robust Network for Subcellular Organelles Classification in Fluorescence Microscopy Images. Annu Int Conf IEEE Eng Med Biol Soc 2020; 2020:1887-1890. [PMID: 33018369 DOI: 10.1109/embc44109.2020.9175162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Automatic identification of subcellular compartments of proteins in fluorescence microscopy images is an important task to quantitatively evaluate cellular processes. A common problem for the development of deep learning based classifiers is that there is only a limited number of labeled images available for training. To address this challenge, we propose a new approach for subcellular organelles classification combining an effective and efficient architecture based on a compact Convolutional Neural Network and deep embedded clustering algorithm. We validate our approach on a benchmark of HeLa cell microscopy images. The network both yields high accuracy that outperforms state of the art methods and has significantly small number of parameters. More interestingly, experimental results show that our method is strongly robust against limited labeled data for training, requiring four times less annotated data than usual while maintaining the high accuracy of 93.9%.
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Abstract
This article presents an optical platform for studying the dynamics of nanoparticle assisted pulsed laser optoporation of individual living cells. Here plasmonic nanoparticles (NPs) act as markers of the exact spatial position of living cell membranes and as an enhancer for localized pulsed laser perforation. High contrast NP imaging using reflected light microscopy (RLM) allows accurate and automatic laser targeting at individual NPs for spatially controlled laser optoporation of single cells at a single point. The NP imaging method is compatible with fluorescence microscopy and a cellular incubator that allows study of real-time perforation kinetics of live cells and the optomechanical interaction of NPs with membranes. These parameters are of great interest for the development and experimental implementation of the technology of pulsed laser optoporation and transfection applied to single living cells as well as to bulk-level assays.
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Affiliation(s)
- Sergiy Patskovsky
- Engineering Physics Department, Ecole Polytechnique de Montréal, Laser Processing and Plasmonics Laboratory, Montréal, Québec H3C 3A7, Canada.
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18
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Wang L, Darviot C, Zapata-Farfan J, Patskovsky S, Trudel D, Meunier M. Designable nanoplasmonic biomarkers for direct microscopy cytopathology diagnostics. J Biophotonics 2019; 12:e201900166. [PMID: 31365187 DOI: 10.1002/jbio.201900166] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 06/26/2019] [Accepted: 07/29/2019] [Indexed: 06/10/2023]
Abstract
Direct microscopy interpretation of fine-needle biopsy cytological samples is routinely used by practicing cytopathologists. Adding possibility to identify selective and multiplexed biomarkers on the same samples and with the same microscopy technique can greatly improve diagnostic accuracy. In this article, we propose to use biomarkers based on designable plasmonic nanoparticles (NPs) with unique optical properties and excellent chemical stability that can satisfy the above-mentioned requirements. By finely controlling the size and composition of gold-silver alloy NPs and gold nanorods, the NPs plasmonic resonance properties, such as scattering efficiency and resonance peak spectral position, are adjusted in order to provide reliable identification and chromatic differentiation by conventional direct microscopy. Efficient darkfield NPs imaging is performed by using a novel circular side illumination adaptor that can be easily integrated into any microscopy setup while preserving standard cytopathology visualization method. The efficiency of the proposed technology for fast visual detection and differentiation of three spectrally distinct NP-markers is demonstrated in different working media, thus confirming the potential application in conventional cytology preparations. It is worth emphasizing that the presented technology does not interfere with standard visualization with immunohistochemical staining, but should rather be considered as a second imaging modality to confirm the diagnostics.
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Affiliation(s)
- Lu Wang
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, Montréal, Québec, Canada
| | - Cecile Darviot
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, Montréal, Québec, Canada
| | - Jennyfer Zapata-Farfan
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, Montréal, Québec, Canada
| | - Sergiy Patskovsky
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, Montréal, Québec, Canada
| | - Dominique Trudel
- Research Center of the Centre Hospitalier de l'Université de Montréal (CHUM), Montreal, Québec, Canada
| | - Michel Meunier
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, Montréal, Québec, Canada
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19
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Darviot C, Hardy P, Meunier M. Laser-induced plasmon-mediated treatment of retinoblastoma in viscous vitreous phantom. J Biophotonics 2019; 12:e201900193. [PMID: 31297950 DOI: 10.1002/jbio.201900193] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 07/04/2019] [Accepted: 07/09/2019] [Indexed: 06/10/2023]
Abstract
Retinoblastoma (RB) is a rare form of cancer of the retina most prevalent in young children. We successfully show that laser-induced cell disruption, mediated by gold plasmonic nanoparticle (NP), is a potential and efficient therapy to kill the cancerous cells. The proof of concept is demonstrated in vitro on cultured Y79 RB cancer cells with a nanosecond laser at 527 nm, for both attached cells at the bottom of a Petri dish and for floating, clustered cells in a viscous vitreous phantom comprised of hyaluronan. We report a cellular death of 82% after irradiation in classic culture medium and a cellular death of 98% in vitreous phantom, for similar number of NPs in each sample. It is found that the NPs efficiently penetrate the floating Y79 clusters cells in the vitreous phantom, leading to a cellular death of over 85% even within the centre of the aggregates. The proposed treatment technique is based on a similar nanosecond laser used to eliminate floaters in the vitreous, but with much lower (100-1000 times) fluences of 20 J cm-2 .
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Affiliation(s)
- Cécile Darviot
- École Polytechnique de Montréal, Montreal, Quebec, Canada
| | - Pierre Hardy
- Sainte Justine Hospital, Montréal, Quebec, Canada
| | - Michel Meunier
- École Polytechnique de Montréal, Montreal, Quebec, Canada
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Boissier R, Gondran-Tellier B, Francois P, Meunier M, Simoncini S, Lyonnet L, Legris T, Arnaud L, Magalon J, Giraudo L, Dignat-George F, Burtey S, Karsenty G, Lechevallier E, Sabatier F, Paul P. Utilisation de la graisse péri-rénale du donneur pour analyser la fonction/dysfonction endothéliale du transplant rénal. Prog Urol 2019. [DOI: 10.1016/j.purol.2019.08.096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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21
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Gondran-Tellier B, Boissier R, Lyonnet L, Simoncini S, Meunier M, Francois P, Legris T, Burtey S, Dignat-Georges F, Karsenty G, Lechevallier E, Sabatier F, Pau P. La graisse péri-rénale issue des prélèvements d’organes : une source non invasive de cellules endothéliales comme modèle d’évaluation du vieillissement vasculaire et de l’alloimmunogénicité des transplants marginaux. Prog Urol 2019. [DOI: 10.1016/j.purol.2019.08.095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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22
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Meunier M, Tantot J, Lebret T, Ghoneim T, Martin F, Taouil T, Vignac M, Baumert H, Vinh-Hung V, Dusaulle-Duchatelle V, Sutter W, Molinié V. Cancer de prostate chez les patients afro-caribéens : sont-ils plus agressifs au diagnostic. Prog Urol 2019. [DOI: 10.1016/j.purol.2019.08.251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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23
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Essendoubi M, Meunier M, Scandolera A, Gobinet C, Manfait M, Lambert C, Auriol D, Reynaud R, Piot O. Conformation changes in human hair keratin observed using confocal Raman spectroscopy after active ingredient application. Int J Cosmet Sci 2019; 41:203-212. [PMID: 30946493 PMCID: PMC6852583 DOI: 10.1111/ics.12528] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 03/21/2019] [Accepted: 04/01/2019] [Indexed: 11/27/2022]
Abstract
OBJECTIVE In hair care cosmetic products' evaluation, one commonly used method is to evaluate the hair appearance as a gold standard in order to determine the effect of an active ingredient on the final state of the hair via visual appreciation. Although other techniques have been proposed for a direct analysis of the hair fibres, they give only surface or structural information, without any accurate molecular information. A different approach based on confocal Raman spectroscopy has been proposed for tracking in situ the molecular change in the keratin directly in the human hair fibres. It presents a high molecular specificity to detect chemical interactions between molecules and can provide molecular information at various depths at the cortex and cuticle levels. METHODS To evaluate the potential of confocal Raman spectroscopy in testing the efficiency of cosmetic ingredients on keratin structure, we undertook a pilot study on the effectiveness of a smoothing shampoo on natural human hair, by analysing α-helix and β-sheet spectral markers in the Amide I band and spectral markers specific to the cystin sulfur content. RESULTS We confirmed that an active proved to be effective on a gold standard decreases α-helix keratin conformation and promotes β-sheet keratin conformation in the hair fibres. We also showed that treatment with the effective active decreases the intensity of covalent disulfide (S-S at 510 cm-1 ) cross-linking bands of cysteine. These data confirm that the effective active also acts on the tertiary structure of keratin. CONCLUSION From these experiments, we concluded that the effective active has a smoothing effect on the human hair fibres by acting on α-helix and β-sheet keratin conformation and on the tertiary structure of keratin. Based on these results, confocal Raman spectroscopy can be considered a powerful technique for investigating the influence of hair cosmetic ingredients on keratin structure in human hair fibres. Moreover, this analytical technique has the advantage of being non-destructive and label free; in addition, it does not require sample extraction or purification and it can be applied routinely in cosmetic laboratories.
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Affiliation(s)
- M. Essendoubi
- EA 7506 Biospectroscopie Translationnelle (BioSpectT)Faculty of PharmacyUniversity of Reims Champagne‐Ardenne51 rue Cognac JayReimsFrance
- Biophysic LaboratoryFaculty of Medicine and PharmacyUniversity of Abdel Malek EssâdiTangerMOUSA
| | - M. Meunier
- Givaudan France SAS Argenteuil55 Rue de la Voie des Bans, Research and DevelopmentPomacleFrance
| | - A. Scandolera
- Givaudan France SAS Argenteuil55 Rue de la Voie des Bans, Research and DevelopmentPomacleFrance
| | - C. Gobinet
- EA 7506 Biospectroscopie Translationnelle (BioSpectT)Faculty of PharmacyUniversity of Reims Champagne‐Ardenne51 rue Cognac JayReimsFrance
| | - M. Manfait
- EA 7506 Biospectroscopie Translationnelle (BioSpectT)Faculty of PharmacyUniversity of Reims Champagne‐Ardenne51 rue Cognac JayReimsFrance
| | - C. Lambert
- Givaudan France SAS Argenteuil55 Rue de la Voie des Bans, Research and DevelopmentPomacleFrance
| | - D. Auriol
- Givaudan France SAS Argenteuil55 Rue de la Voie des Bans, Research and DevelopmentPomacleFrance
| | - R. Reynaud
- Givaudan France SAS Argenteuil55 Rue de la Voie des Bans, Research and DevelopmentPomacleFrance
| | - O. Piot
- EA 7506 Biospectroscopie Translationnelle (BioSpectT)Faculty of PharmacyUniversity of Reims Champagne‐Ardenne51 rue Cognac JayReimsFrance
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Abstract
We present the development of an innovative technology for quantitative multiplexed cytology analysis based on the application of spectrally distinctive plasmonic nanoparticles (NPs) as optical probes and on cost-effective side-illumination multispectral darkfield microscopy (SIM) as the differential NP imaging method. SIM is based on lateral illumination by arrays of discrete color RGB light emitting diodes (LEDs) of spectrally adjusted plasmonic NPs and consecutive detection by the conventional CMOS color camera. We demonstrate the enhanced contrast and higher resolution of our method for individual NP detection in the liquid medium and of NP markers attached on the cell membrane in a cytology preparation by comparing it to the conventional darkfield microscopy (DFM). The proposed illumination and detection system is compatible with current clinical microscopy equipment used by pathologists and can greatly simplify the adaptation of plasmonic NPs as novel reliable and stable biological multiplexed chromatic markers for biodetection and diagnosis.
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Affiliation(s)
- Mengjiao Qi
- Engineering Physics Department, Ecole Polytechnique de Montréal, Laser Processing and Plasmonics Laboratory, Montréal, Québec H3C 3A7, Canada.
| | - Cecile Darviot
- Engineering Physics Department, Ecole Polytechnique de Montréal, Laser Processing and Plasmonics Laboratory, Montréal, Québec H3C 3A7, Canada.
| | - Sergiy Patskovsky
- Engineering Physics Department, Ecole Polytechnique de Montréal, Laser Processing and Plasmonics Laboratory, Montréal, Québec H3C 3A7, Canada.
| | - Michel Meunier
- Engineering Physics Department, Ecole Polytechnique de Montréal, Laser Processing and Plasmonics Laboratory, Montréal, Québec H3C 3A7, Canada.
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25
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Doppenberg A, Meunier M, Boutopoulos C. A needle-like optofluidic probe enables targeted intracellular delivery by confining light-nanoparticle interaction on single cell. Nanoscale 2018; 10:21871-21878. [PMID: 30457139 DOI: 10.1039/c8nr03895c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Intracellular delivery of molecular cargo is the basis for a plethora of therapeutic applications, including gene therapy and cancer treatment. A very efficient method to perform intracellular delivery is the photo-activation of nanomaterials that have been previously directed to the cell vicinity and bear releasable molecular cargo. However, potential in vivo applications of this method are limited by our ability to deliver nanomaterials and light in tissue. Here, we demonstrate intracelullar delivery using a needle-like optofluidic probe capable of penetrating soft tissue. Firstly, we used the optofluidic probe to confine an intracellular delivery mixture, composed of 100 nm gold nanoparticles (AuNP) and membrane-impermeable calcein, in the vicinity of cancer cells. Secondly, we delivered nanosecond (ns) laser pulses (wavelength: 532 nm; duration: 5 ns) using the same probe and without introducing a AuNP cells incubation step. The AuNP photo-activation caused localized and reversible disruption of the cell membrane, enabling calcein delivery into the cytoplasm. We measured 67% intracellular delivery efficacy and showed that the optofluidic probe can be used to treat cells with single-cell precision. Finally, we demonstrated targeted delivery in tissue (mouse retinal explant) ex vivo. We expect that this method can enable nanomaterial-assisted intracellular delivery applications in soft tissue (e.g. brain, retina) of small animals.
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Affiliation(s)
- Andrew Doppenberg
- Maisonneuve-Rosemont Hospital Research Centre, Montreal, Quebec, Canada.
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26
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Wilson AM, Mazzaferri J, Bergeron É, Patskovsky S, Marcoux-Valiquette P, Costantino S, Sapieha P, Meunier M. In Vivo Laser-Mediated Retinal Ganglion Cell Optoporation Using K V1.1 Conjugated Gold Nanoparticles. Nano Lett 2018; 18:6981-6988. [PMID: 30285455 DOI: 10.1021/acs.nanolett.8b02896] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Vision loss caused by retinal diseases affects hundreds of millions of individuals worldwide. The retina is a delicate central nervous system tissue stratified into layers of cells with distinct roles. Currently, there is a void in treatments that selectively target diseased retinal cells, and current therapeutic paradigms present complications associated with off-target effects. Herein, as a proof of concept, we introduce an in vivo method using a femtosecond laser to locally optoporate retinal ganglion cells (RGCs) targeted with functionalized gold nanoparticles (AuNPs). We provide evidence that AuNPs functionalized with an antibody toward the cell-surface voltage-gated K+ channel subunit KV1.1 can selectively deliver fluorescently tagged siRNAs or fluorescein isothiocyanate-dextran dye into retinal cells when irradiated with an 800 nm 100 fs laser. Importantly, neither AuNP administration nor irradiation resulted in RGC death. This system provides a novel, non-viral-based approach that has the potential to selectively target retinal cells in diseased regions while sparing healthy areas and may be harnessed in future cell-specific therapies for retinal degenerative diseases.
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Affiliation(s)
- Ariel M Wilson
- Department of Engineering Physics , Polytechnique Montréal , Montreal , Quebec , Canada , H3C 3A7
| | | | - Éric Bergeron
- Department of Engineering Physics , Polytechnique Montréal , Montreal , Quebec , Canada , H3C 3A7
| | - Sergiy Patskovsky
- Department of Engineering Physics , Polytechnique Montréal , Montreal , Quebec , Canada , H3C 3A7
| | - Paule Marcoux-Valiquette
- Department of Engineering Physics , Polytechnique Montréal , Montreal , Quebec , Canada , H3C 3A7
| | | | | | - Michel Meunier
- Department of Engineering Physics , Polytechnique Montréal , Montreal , Quebec , Canada , H3C 3A7
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27
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Meunier M, Neuzillet Y, Raynaud J, Radulescu C, Fiet J, Giton F, Rouanne M, Dreyfus J, Lebret T, Botto H. Concentrations d’androgènes sériques et intraprostatiques : comparaison de patients atteints de cancer de prostate et d’hypertrophie bénigne de prostate. Prog Urol 2018. [DOI: 10.1016/j.purol.2018.07.143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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28
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Meunier M, Moal V, Daniel L, Basire A, Aubert O, Purgus R, Brunet P, Berland Y, Legris T. Insuffisance rénale aiguë et boli préemptifs de corticoïdes chez les transplantés rénaux : une étude rétrospective. Nephrol Ther 2018. [DOI: 10.1016/j.nephro.2018.07.388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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29
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Meunier M, Rouanne M, Hoang P, Froissart M, Lebret T, Courbebaisse M. Évolution du DFG mesuré et détermination de la meilleure méthode d’estimation du DFG chez les patients traités par cystectomie radicale. Nephrol Ther 2018. [DOI: 10.1016/j.nephro.2018.07.207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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30
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Boudhabhay I, Knebelmann B, Debiais C, Marchal A, Meunier M, Brunel M, Legendre C, Amrouche L, Tremolieres P. Colectasie transverse de Fabry un an après une première transplantation rénale malgré une enzymothérapie substitutive bien conduite. Nephrol Ther 2018. [DOI: 10.1016/j.nephro.2018.07.399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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31
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Wilson AM, Shao Z, Grenier V, Mawambo G, Daudelin JF, Dejda A, Pilon F, Popovic N, Boulet S, Parinot C, Oubaha M, Labrecque N, de Guire V, Laplante M, Lettre G, Sennlaub F, Joyal JS, Meunier M, Sapieha P. Neuropilin-1 expression in adipose tissue macrophages protects against obesity and metabolic syndrome. Sci Immunol 2018; 3:3/21/eaan4626. [DOI: 10.1126/sciimmunol.aan4626] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Accepted: 01/18/2018] [Indexed: 12/24/2022]
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32
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Meunier M, Goupil A, Lienard P. Predicting drug loading in PLA-PEG nanoparticles. Int J Pharm 2017; 526:157-166. [DOI: 10.1016/j.ijpharm.2017.04.043] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2017] [Revised: 04/11/2017] [Accepted: 04/18/2017] [Indexed: 12/26/2022]
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33
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Dagallier A, Boulais E, Boutopoulos C, Lachaine R, Meunier M. Multiscale modeling of plasmonic enhanced energy transfer and cavitation around laser-excited nanoparticles. Nanoscale 2017; 9:3023-3032. [PMID: 28182187 DOI: 10.1039/c6nr08773f] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Nanoscale bubbles generated around laser-excited metallic nanoparticles are promising candidates for targeted drug and gene delivery in living cells. The development of new nanomaterials for efficient nanobubble-based therapy is however limited by the lack of reliable computational approaches for the prediction of their size and dynamics, due to the wide range of time and space scales involved. In this work, we present a multiscale modeling framework that segregates the various channels of plasmon de-excitation and energy transfer to describe the generation and dynamics of plasmonic nanobubbles. Detailed comparison with time-resolved shadowgraph imaging and spectroscopy data demonstrates that the bubble size, dynamics, and formation threshold can be quantitatively predicted for various types of nanostructures and irradiation parameters, with an error smaller than the experimental uncertainty. Our model in addition provides crucial physical insights into non-linear interactions in the near-field that should guide the experimental design of nanoplasmonic materials for nanobubble-based applications in nanomedicine.
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Affiliation(s)
- Adrien Dagallier
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, Montreal, Quebec H3C 3A7, Canada.
| | - Etienne Boulais
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, Montreal, Quebec H3C 3A7, Canada. and Laboratory of Biosensors and Nanomachines, Department of Chemistry, Montreal, Quebec H3T 1J4, Canada
| | - Christos Boutopoulos
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, Montreal, Quebec H3C 3A7, Canada. and SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews, KY16 9SS, UK
| | - Rémi Lachaine
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, Montreal, Quebec H3C 3A7, Canada.
| | - Michel Meunier
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, Montreal, Quebec H3C 3A7, Canada.
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34
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Bahrami F, Maisonneuve M, Meunier M, Montazeri AO, Kim Y, Kherani NP, Aitchison JS, Mojahedi M. Kinetic analysis of nanoparticle-protein interactions using a plasmon waveguide resonance. J Biophotonics 2017; 10:271-277. [PMID: 26871886 DOI: 10.1002/jbio.201500267] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2015] [Revised: 12/19/2015] [Accepted: 01/11/2016] [Indexed: 06/05/2023]
Abstract
A plasmon waveguide resonance (PWR) sensor is proposed for studying the interaction between gold nanoparticles and proteins. The ability of the PWR sensor to operate in both TM and TE Polarizations, i.e. its polarization diversity, facilitates the simultaneous spectroscopy of the nanoparticles surface reactions using both polarizations. The response of each polarization to streptavidin-biotin binding at the surface of gold nanoparticles is investigated in real time. Finally, using the principles of multimode spectroscopy, the nanoparticle's surface reactions are decoupled from the bulk solution refractive index variations. Schematic diagram of the NP-modified PWR sensor.
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Affiliation(s)
- Farshid Bahrami
- Department of Electrical and Computer Engineering, University of Toronto, Ontario, M5S 3G4, Canada
| | - Mathieu Maisonneuve
- Department of Engineering Physics, EcolePolytechnique de Montreal, Montreal, H3C 3A7, Canada
| | - Michel Meunier
- Department of Engineering Physics, EcolePolytechnique de Montreal, Montreal, H3C 3A7, Canada
| | - Arthur O Montazeri
- Department of Electrical and Computer Engineering, University of Toronto, Ontario, M5S 3G4, Canada
| | - Yujin Kim
- Department of Electrical and Computer Engineering, University of Toronto, Ontario, M5S 3G4, Canada
| | - Nazir P Kherani
- Department of Electrical and Computer Engineering, University of Toronto, Ontario, M5S 3G4, Canada
| | - J Stewart Aitchison
- Department of Electrical and Computer Engineering, University of Toronto, Ontario, M5S 3G4, Canada
| | - Mo Mojahedi
- Department of Electrical and Computer Engineering, University of Toronto, Ontario, M5S 3G4, Canada
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Meunier M, Eyraud R, Senechal C, Santy A, Blanchet P. La densité du PSA est un facteur prédictif de tumeurs agressives après prostatectomie radicale chez les patients guadeloupéens initialement en surveillance active. Prog Urol 2016. [DOI: 10.1016/j.purol.2016.07.243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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36
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Meunier M, Senechal C, Eyraud R, Santy A, Blanchet P. Suivi à moyen et long terme d’une cohorte prospective de patients antillais en surveillance active sur critères élargis. Prog Urol 2016. [DOI: 10.1016/j.purol.2016.07.241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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37
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Boutopoulos C, Dagallier A, Sansone M, Blanchard-Dionne AP, Lecavalier-Hurtubise É, Boulais É, Meunier M. Photon-induced generation and spatial control of extreme pressure at the nanoscale with a gold bowtie nano-antenna platform. Nanoscale 2016; 8:17196-17203. [PMID: 27714040 DOI: 10.1039/c6nr03888c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Precise spatial and temporal control of pressure stimulation at the nanometer scale is essential for the fabrication and manipulation of nano-objects, and for exploring single-molecule behaviour of matter under extreme conditions. However, state-of-the-art nano-mechanical transducers require sophisticated driving hardware and are currently limited to moderate pressure regimes. Here we report a gold plasmonic bowtie (AuBT) nano-antennas array that can generate extreme pressure stimulus of ∼100 GPa in the ps (10-12 s) time scale with sub-wavelength resolution upon irradiation with ultra-short laser pulses. Our method leverages the non-linear interaction of photons with water molecules to excite a nano-plasma in the plasmon-enhanced near-field and induce extreme thermodynamic states. The proposed method utilizes laser pulses, which in contrast to micro- and nano-mechanical actuators offers simplicity and versatility. We present time-resolved shadowgraphic imaging, electron microscopy and simulation data that suggest that our platform can efficiently create cavitation nano-bubbles and generate intense pressure in specific patterns, which can be controlled by the selective excitation of plasmon modes of distinct polarizations. This novel platform should enable probing non-invasively the mechanical response of cells and single-molecules at time and pressure regimes that are currently difficult to reach with other methods.
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Affiliation(s)
- Christos Boutopoulos
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, Montréal, Québec H3C 3A7, Canada. and SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews, KY16 9SS, UK
| | - Adrien Dagallier
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, Montréal, Québec H3C 3A7, Canada.
| | - Maria Sansone
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, Montréal, Québec H3C 3A7, Canada. and Dipartimento di Chimica "A.M. Tamburro", Università della Basilicata, Viadell'Ateneo Lucano 10, 85100 Potenza, Italy
| | - Andre-Pierre Blanchard-Dionne
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, Montréal, Québec H3C 3A7, Canada.
| | - Évelyne Lecavalier-Hurtubise
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, Montréal, Québec H3C 3A7, Canada.
| | - Étienne Boulais
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, Montréal, Québec H3C 3A7, Canada. and Laboratory of Biosensors and Nanomachines, Department of Chemistry, Université de Montréal, Montréal, Québec H3T 1J4, Canada
| | - Michel Meunier
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, Montréal, Québec H3C 3A7, Canada.
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Abstract
Selective labelling, identification and spatial distribution of cell surface biomarkers can provide important clinical information, such as distinction between healthy and diseased cells, evolution of a disease and selection of the optimal patient-specific treatment. Immunofluorescence is the gold standard for efficient detection of biomarkers expressed by cells. However, antibodies (Abs) conjugated to fluorescent dyes remain limited by their photobleaching, high sensitivity to the environment, low light intensity, and wide absorption and emission spectra. Immunoplasmonics is a novel microscopy method based on the visualization of Abs-functionalized plasmonic nanoparticles (fNPs) targeting cell surface biomarkers. Tunable fNPs should provide higher multiplexing capacity than immunofluorescence since NPs are photostable over time, strongly scatter light at their plasmon peak wavelengths and can be easily functionalized. In this article, we experimentally demonstrate accurate multiplexed detection based on the immunoplasmonics approach. First, we achieve the selective labelling of three targeted cell surface biomarkers (cluster of differentiation 44 (CD44), epidermal growth factor receptor (EGFR) and voltage-gated K(+) channel subunit KV1.1) on human cancer CD44(+) EGFR(+) KV1.1(+) MDA-MB-231 cells and reference CD44(-) EGFR(-) KV1.1(+) 661W cells. The labelling efficiency with three stable specific immunoplasmonics labels (functionalized silver nanospheres (CD44-AgNSs), gold (Au) NSs (EGFR-AuNSs) and Au nanorods (KV1.1-AuNRs)) detected by reflected light microscopy (RLM) is similar to the one with immunofluorescence. Second, we introduce an improved method for 3D localization and spectral identification of fNPs based on fast z-scanning by RLM with three spectral filters corresponding to the plasmon peak wavelengths of the immunoplasmonics labels in the cellular environment (500 nm for 80 nm AgNSs, 580 nm for 100 nm AuNSs and 700 nm for 40 nm × 92 nm AuNRs). Third, the developed technology is simple and compatible with standard epi-fluorescence microscopes used in biological and clinical laboratories. Thus, 3D multiplexed immunoplasmonics microscopy is ready for clinical applications as a cost-efficient alternative to immunofluorescence.
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Affiliation(s)
- Éric Bergeron
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, C.P. 6079, Succursale Centre-Ville, Montréal, QC H3C 3A7, Canada.
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Guillaume B, Feraaouni M, Bastie J, Duvivier L, Carly Y, Dewez F, Delespinette F, Bellier S, Romain C, Meunier M, Treille S. Entraînement physique per-dialytique chez le patient dialysé : impact nutritionnel : étude rétrospective d’une cohorte. NUTR CLIN METAB 2016. [DOI: 10.1016/j.nupar.2016.04.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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40
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Attalin V, Avignon A, Sultan A, Meunier M, Roussel J, Delgado C, Rafrifi I, Laure L, Nogue M, Ameline A. Utilisation d’un outil innovant d’aide au diagnostic et à la prise en charge de la dénutrition. NUTR CLIN METAB 2016. [DOI: 10.1016/j.nupar.2016.04.047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Lachaine R, Boutopoulos C, Lajoie PY, Boulais É, Meunier M. Rational Design of Plasmonic Nanoparticles for Enhanced Cavitation and Cell Perforation. Nano Lett 2016; 16:3187-94. [PMID: 27048763 DOI: 10.1021/acs.nanolett.6b00562] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Metallic nanoparticles are routinely used as nanoscale antenna capable of absorbing and converting photon energy with subwavelength resolution. Many applications, notably in nanomedicine and nanobiotechnology, benefit from the enhanced optical properties of these materials, which can be exploited to image, damage, or destroy targeted cells and subcellular structures with unprecedented precision. Modern inorganic chemistry enables the synthesis of a large library of nanoparticles with an increasing variety of shapes, composition, and optical characteristic. However, identifying and tailoring nanoparticles morphology to specific applications remains challenging and limits the development of efficient nanoplasmonic technologies. In this work, we report a strategy for the rational design of gold plasmonic nanoshells (AuNS) for the efficient ultrafast laser-based nanoscale bubble generation and cell membrane perforation, which constitute one of the most crucial challenges toward the development of effective gene therapy treatments. We design an in silico rational design framework that we use to tune AuNS morphology to simultaneously optimize for the reduction of the cavitation threshold while preserving the particle structural integrity. Our optimization procedure yields optimal AuNS that are slightly detuned compared to their plasmonic resonance conditions with an optical breakdown threshold 30% lower than randomly selected AuNS and 13% lower compared to similarly optimized gold nanoparticles (AuNP). This design strategy is validated using time-resolved bubble spectroscopy, shadowgraphy imaging and electron microscopy that confirm the particle structural integrity and a reduction of 51% of the cavitation threshold relative to optimal AuNP. Rationally designed AuNS are finally used to perforate cancer cells with an efficiency of 61%, using 33% less energy compared to AuNP, which demonstrate that our rational design framework is readily transferable to a cell environment. The methodology developed here thus provides a general strategy for the systematic design of nanoparticles for nanomedical applications and should be broadly applicable to bioimaging and cell nanosurgery.
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Affiliation(s)
- Rémi Lachaine
- Laser Processing and Plasmonics Laboratory, Engineering Physics Department, École Polytechnique de Montréal , Montréal, Québec H3C 3A7, Canada
| | - Christos Boutopoulos
- Laser Processing and Plasmonics Laboratory, Engineering Physics Department, École Polytechnique de Montréal , Montréal, Québec H3C 3A7, Canada
- School of Physics and Astronomy, SUPA, University of St. Andrews , North Haugh, St. Andrews, KY16 9SS, United Kingdom
| | - Pierre-Yves Lajoie
- Laser Processing and Plasmonics Laboratory, Engineering Physics Department, École Polytechnique de Montréal , Montréal, Québec H3C 3A7, Canada
| | - Étienne Boulais
- Laser Processing and Plasmonics Laboratory, Engineering Physics Department, École Polytechnique de Montréal , Montréal, Québec H3C 3A7, Canada
- Department of Chemistry, Université de Montréal , Montréal, Québec H3C 3J7, Canada
| | - Michel Meunier
- Laser Processing and Plasmonics Laboratory, Engineering Physics Department, École Polytechnique de Montréal , Montréal, Québec H3C 3A7, Canada
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Meunier M, Guyard-Nicodème M, Dory D, Chemaly M. Control strategies against Campylobacter
at the poultry production level: biosecurity measures, feed additives and vaccination. J Appl Microbiol 2016; 120:1139-73. [DOI: 10.1111/jam.12986] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Revised: 09/25/2015] [Accepted: 10/09/2015] [Indexed: 11/28/2022]
Affiliation(s)
- M. Meunier
- HQPAP - Unit of Hygiene and Quality of Poultry and Pork Products; French Agency for Food, Environmental and Occupational Health & Safety (ANSES); Ploufragan France
- GVB - Viral Genetics and Biosafety Unit; French Agency for Food, Environmental and Occupational Health & Safety (ANSES); Ploufragan France
- UEB - European University of Brittany; Rennes France
| | - M. Guyard-Nicodème
- HQPAP - Unit of Hygiene and Quality of Poultry and Pork Products; French Agency for Food, Environmental and Occupational Health & Safety (ANSES); Ploufragan France
- UEB - European University of Brittany; Rennes France
| | - D. Dory
- GVB - Viral Genetics and Biosafety Unit; French Agency for Food, Environmental and Occupational Health & Safety (ANSES); Ploufragan France
- UEB - European University of Brittany; Rennes France
| | - M. Chemaly
- HQPAP - Unit of Hygiene and Quality of Poultry and Pork Products; French Agency for Food, Environmental and Occupational Health & Safety (ANSES); Ploufragan France
- UEB - European University of Brittany; Rennes France
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Bergeron E, Boutopoulos C, Martel R, Torres A, Rodriguez C, Niskanen J, Lebrun JJ, Winnik FM, Sapieha P, Meunier M. Cell-specific optoporation with near-infrared ultrafast laser and functionalized gold nanoparticles. Nanoscale 2015; 7:17836-47. [PMID: 26459958 DOI: 10.1039/c5nr05650k] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Selective targeting of diseased cells can increase therapeutic efficacy and limit off-target adverse effects. We developed a new tool to selectively perforate living cells with functionalized gold nanoparticles (AuNPs) and near-infrared (NIR) femtosecond (fs) laser. The receptor CD44 strongly expressed by cancer stem cells was used as a model for selective targeting. Citrate-capped AuNPs (100 nm in diameter) functionalized with 0.01 orthopyridyl-disulfide-poly(ethylene glycol) (5 kDa)-N-hydroxysuccinimide (OPSS-PEG-NHS) conjugated to monoclonal antibodies per nm(2) and 5 μM HS-PEG (5 kDa) were colloidally stable in cell culture medium containing serum proteins. These AuNPs attached mostly as single particles 115 times more to targeted CD44(+) MDA-MB-231 and CD44(+) ARPE-19 cells than to non-targeted CD44(-) 661W cells. Optimally functionalized AuNPs enhanced the fs laser (800 nm, 80-100 mJ cm(-2) at 250 Hz or 60-80 mJ cm(-2) at 500 Hz) to selectively perforate targeted cells without affecting surrounding non-targeted cells in co-culture. This novel highly versatile treatment paradigm can be adapted to target and perforate other cell populations by adapting to desired biomarkers. Since living biological tissues absorb energy very weakly in the NIR range, the developed non-invasive tool may provide a safe, cost-effective clinically relevant approach to ablate pathologically deregulated cells and limit complications associated with surgical interventions.
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Affiliation(s)
- Eric Bergeron
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, C.P. 6079, Succursale Centre-ville, Montreal, QC H3C 3A7, Canada.
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Senechal C, Meunier M, Eyraud R, Brureau L, Blanchet P, Gourtaud G, Fofana M, Chaste D, Roux V. La densité du PSA≤0,10ng/mL/g permet-elle de mieux sélectionner les patients éligibles à la surveillance active du cancer de prostate localisé chez les patients antillais ? Prog Urol 2015; 25:833-4. [DOI: 10.1016/j.purol.2015.08.234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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45
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Boutopoulos C, Hatef A, Fortin-Deschênes M, Meunier M. Dynamic imaging of a single gold nanoparticle in liquid irradiated by off-resonance femtosecond laser. Nanoscale 2015; 7:11758-65. [PMID: 26104482 DOI: 10.1039/c5nr02721g] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Plasmonic nanoparticles can lead to extreme confinement of the light in the near field. This unique ability of plasmonic nanoparticles can be used to generate nanobubbles in liquid. In this work, we demonstrate with single-particle monitoring that 100 nm gold nanoparticles (AuNPs) irradiated by off-resonance femtosecond (fs) laser in the tissue therapeutic optical window (λ = 800 nm), can act as a durable nanolenses in liquid and provoke nanocavitation while remaining intact. We have employed combined ultrafast shadowgraphic imaging, in situ dark field imaging and dynamic tracking of AuNP Brownian motion to ensure the study of individual AuNPs/nanolenses under multiple fs laser pulses. We demonstrate that 100 nm AuNPs can generate multiple, highly confined (radius down to 550 nm) and transient (life time < 50 ns) nanobubbles. The latter is of significant importance for future development of in vivo AuNP-assisted laser nanosurgery and theranostic applications, where AuNP fragmentation should be avoided to prevent side effects, such as cytotoxicity and immune system's response. The experimental results have been correlated with theoretical modeling to provide an insight to the AuNP-safe cavitation mechanism as well as to investigate the deformation mechanism of the AuNPs at high laser fluences.
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Affiliation(s)
- Christos Boutopoulos
- Laser Processing and Plasmonics Laboratory, Engineering Physics Department, Polytechnique Montréal, Montréal, Québec H3C 3A7, Canada.
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46
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Patskovsky S, Bergeron E, Rioux D, Meunier M. Wide-field hyperspectral 3D imaging of functionalized gold nanoparticles targeting cancer cells by reflected light microscopy. J Biophotonics 2015; 8:401-407. [PMID: 24961507 DOI: 10.1002/jbio.201400025] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Revised: 03/06/2014] [Accepted: 05/29/2014] [Indexed: 06/03/2023]
Abstract
We present a new hyperspectral reflected light microscopy system with a scanned broadband supercontinuum light source. This wide-field and low phototoxic hyperspectral imaging system has been successful for performing spectral three-dimensional (3D) localization and spectroscopic identification of CD44-targeted PEGylated AuNPs in fixed cell preparations. Such spatial and spectral information is essential for the improvement of nanoplasmonic-based imaging, disease detection and treatment in complex biological environment. The presented system can be used for real-time 3D NP tracking as spectral sensors, thus providing new avenues in the spatio-temporal characterization and detection of bioanalytes. 3D image of the distribution of functionalized AuNPs attached to CD44-expressing MDA-MB-231 human cancer cells.
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47
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Ding W, Boutopoulos C, Bergeron E, Wilson A, Costantino S, Sapieha P, Meunier M. 363. Laser-Triggered Gold Nanoparticle-Assisted Cell Poration for Selective Gene Delivery. Mol Ther 2015. [DOI: 10.1016/s1525-0016(16)33972-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Abstract
Pathogen detection is of utmost importance in many sectors, such as in the food industry, environmental quality control, clinical diagnostics, bio-defence and counter-terrorism. Failure to appropriately, and specifically, detect pathogenic bacteria can lead to serious consequences, and may ultimately be lethal. Public safety, new legislation, recent outbreaks in food contamination, and the ever-increasing prevalence of multidrug-resistant infections have fostered a worldwide research effort targeting novel biosensing strategies. This review concerns phage-based analytical and biosensing methods targeted towards theranostic applications. We discuss and review phage-based assays, notably phage amplification, reporter phage, phage lysis, and bioluminescence assays for the detection of bacterial species, as well as phage-based biosensors, including optical (comprising SPR sensors and fiber optic assays), electrochemical (comprising amperometric, potentiometric, and impedimetric sensors), acoustic wave and magnetoelastic sensors.
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Affiliation(s)
- N Tawil
- Regroupement Québécois de Matériaux de Pointe, Department of Engineering Physics, École Polytechnique de Montréal, Case Postale 6079, succursale Centre-ville, Montréal, Québec H3C 3A7, Canada.
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49
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Dallaire AM, Patskovsky S, Vallée-Bélisle A, Meunier M. Electrochemical plasmonic sensing system for highly selective multiplexed detection of biomolecules based on redox nanoswitches. Biosens Bioelectron 2015; 71:75-81. [PMID: 25889347 DOI: 10.1016/j.bios.2015.04.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Revised: 03/24/2015] [Indexed: 02/01/2023]
Abstract
In this paper, we present the development of a nanoswitch-based electrochemical surface plasmon resonance (eSPR) transducer for the multiplexed and selective detection of DNA and other biomolecules directly in complex media. To do so, we designed an experimental set-up for the synchronized measurements of electrochemical and electro-plasmonic responses to the activation of multiple electrochemically labeled structure-switching biosensors. As a proof of principle, we adapted this strategy for the detection of DNA sequences that are diagnostic of two pathogens (drug-resistant tuberculosis and Escherichia coli) by using methylene blue-labeled structure-switching DNA stem-loop. The experimental sensitivity of the switch-based eSPR sensor is estimated at 5 nM and target detection is achieved within minutes. Each sensor is reusable several times with a simple 8M urea washing procedure. We then demonstrated the selectivity and multiplexed ability of these switch-based eSPR by simultaneously detecting two different DNA sequences. We discuss the advantages of the proposed eSPR approach for the development of highly selective sensor devices for the rapid and reliable detection of multiple molecular markers in complex samples.
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Affiliation(s)
- Anne-Marie Dallaire
- Laser Processing and Plasmonics Laboratory, École Polytechnique de Montréal, Department of Engineering Physics, C.P. 6079, succ. Centre-Ville, Montréal, QC, Canada H3C 3A7
| | - Sergiy Patskovsky
- Laser Processing and Plasmonics Laboratory, École Polytechnique de Montréal, Department of Engineering Physics, C.P. 6079, succ. Centre-Ville, Montréal, QC, Canada H3C 3A7
| | - Alexis Vallée-Bélisle
- Laboratory of Biosensors and Nanomachines, Université de Montréal, Department of Chemistry, C.P. 6128, succ. Centre-Ville, Montréal, QC, Canada H3C 3J7.
| | - Michel Meunier
- Laser Processing and Plasmonics Laboratory, École Polytechnique de Montréal, Department of Engineering Physics, C.P. 6079, succ. Centre-Ville, Montréal, QC, Canada H3C 3A7.
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Hatef A, Meunier M. Plasma-mediated photothermal effects in ultrafast laser irradiation of gold nanoparticle dimers in water. Opt Express 2015; 23:1967-80. [PMID: 25836068 DOI: 10.1364/oe.23.001967] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The intention of this paper is to study the physical mechanism underlying the response of gold nanoparticle (AuNP) dimers to a near-infrared off-resonance femtosecond pulse laser in aqueous medium. We show that the strongly localized field enhancement in the gap distance and around nanoparticles significantly reduces the laser fluence threshold to achieve an optical breakdown in comparison with an AuNP monomer. This optical breakdown results from highly localized plasma in surrounding media where the nanoparticles stay intact. Also the impact of the gap distance, field polarization, laser fluence and pulse duration on the energy deposition in plasma is presented. These results can be used to make nanoscale plasmonic devices for variety of absorption-based applications.
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