1
|
Wang Z, Giugliano G, Behal J, Schiavo M, Memmolo P, Miccio L, Grilli S, Nazzaro F, Ferraro P, Bianco V. All-optical dual module platform for motility-based functional scrutiny of microencapsulated probiotic bacteria. BIOMEDICAL OPTICS EXPRESS 2024; 15:2202-2223. [PMID: 38633099 PMCID: PMC11019698 DOI: 10.1364/boe.510543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 12/13/2023] [Accepted: 12/13/2023] [Indexed: 04/19/2024]
Abstract
Probiotic bacteria are widely used in pharmaceutics to offer health benefits. Microencapsulation is used to deliver probiotics into the human body. Capsules in the stomach have to keep bacteria constrained until release occurs in the intestine. Once outside, bacteria must maintain enough motility to reach the intestine walls. Here, we develop a platform based on two label-free optical modules for rapidly screening and ranking probiotic candidates in the laboratory. Bio-speckle dynamics assay tests the microencapsulation effectiveness by simulating the gastrointestinal transit. Then, a digital holographic microscope 3D-tracks their motility profiles at a single element level to rank the strains.
Collapse
Affiliation(s)
- Zhe Wang
- Institute of Applied Sciences and Intelligent Systems “E. Caianiello”, National Research Council (ISASI-CNR), Via Campi Flegrei, 34, Pozzuoli, 80078, Italy
- Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università degli Studi di Napoli Federico II, Piazzale Vincenzo Tecchio 80, Napoli 80125, Italy
| | - Giusy Giugliano
- Institute of Applied Sciences and Intelligent Systems “E. Caianiello”, National Research Council (ISASI-CNR), Via Campi Flegrei, 34, Pozzuoli, 80078, Italy
| | - Jaromir Behal
- Institute of Applied Sciences and Intelligent Systems “E. Caianiello”, National Research Council (ISASI-CNR), Via Campi Flegrei, 34, Pozzuoli, 80078, Italy
- Department of Optics, Faculty of Science, Palacky University, 17. listopadu 12, Olomouc 77146, Czechia
| | - Michela Schiavo
- Institute of Applied Sciences and Intelligent Systems “E. Caianiello”, National Research Council (ISASI-CNR), Via Campi Flegrei, 34, Pozzuoli, 80078, Italy
| | - Pasquale Memmolo
- Institute of Applied Sciences and Intelligent Systems “E. Caianiello”, National Research Council (ISASI-CNR), Via Campi Flegrei, 34, Pozzuoli, 80078, Italy
| | - Lisa Miccio
- Institute of Applied Sciences and Intelligent Systems “E. Caianiello”, National Research Council (ISASI-CNR), Via Campi Flegrei, 34, Pozzuoli, 80078, Italy
| | - Simonetta Grilli
- Institute of Applied Sciences and Intelligent Systems “E. Caianiello”, National Research Council (ISASI-CNR), Via Campi Flegrei, 34, Pozzuoli, 80078, Italy
| | - Filomena Nazzaro
- Istituto di Scienze dell'Alimentazione, Consiglio Nazionale delle Ricerche (ISA-CNR), Via Roma, 64, Avellino 83100, Italy
| | - Pietro Ferraro
- Institute of Applied Sciences and Intelligent Systems “E. Caianiello”, National Research Council (ISASI-CNR), Via Campi Flegrei, 34, Pozzuoli, 80078, Italy
| | - Vittorio Bianco
- Institute of Applied Sciences and Intelligent Systems “E. Caianiello”, National Research Council (ISASI-CNR), Via Campi Flegrei, 34, Pozzuoli, 80078, Italy
| |
Collapse
|
2
|
Mao Y, Liang X, Zhao J, Jiang L, Liang Q, Ngai T, Gong X, Wu M. 3D monitoring of the microphase separations inside the intraocular lens. Acta Biomater 2024; 177:178-188. [PMID: 38307480 DOI: 10.1016/j.actbio.2024.01.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 01/09/2024] [Accepted: 01/23/2024] [Indexed: 02/04/2024]
Abstract
Glistenings often occur after implanting the intraocular lens (IOL) due to the formation of numerous microvacuoles (MVs) and may lead to deterioration of vision quality. Previous studies showed the formation of MVs was associated with the hydrophobicity of IOL materials. Yet, the mechanism remains an open question due to the complexity of IOL polymer networks. In this study, two commercialized IOLs with similar hydrophobicity are found distinct in the formation of MVs. The 3D growth kinetics of MVs during cooling processes are captured for the first time by digital holographic microscopy (DHM) and the components of MVs are measured by DHM and Raman spectroscopy. The results reveal that the growth of MVs stems from the microphase separation of water and surrounding IOL polymers. A polymer swelling model is thus proposed to describe the microphase separation process which is found dependent on the elasticity of IOL polymer networks. The total volume of MVs is determined by the IOL hydrophobicity, while the elastic force of IOL polymer networks determines the number density and size of MVs. This study demonstrates an approach for characterizing the phase separation of crosslinked polymeric materials in biosystems and sheds lights on the refinement of IOL materials. STATEMENT OF SIGNIFICANCE: Glistenings due to the formation of numerous microvacuoles (MVs) in intraocular lens (IOL) can occur after IOL implantation, which may induce poor quality of vision. However, the underlying mechanism of MVs formation is still an open question. This study establishes an in-situ 3D imaging platform to monitor growth kinetics of the MVs in IOLs, which allows to uncover the mechanism of glistenings formation resulting from the microphase separation. The findings imply the material hydrophobicity influences the total volume of MVs, while the local elasticity of IOL polymer networks determines the number density and the size of MVs. This study offers a new approach for characterizing phase separation in crosslinking biosystems and sheds lights on the refinement of IOL materials.
Collapse
Affiliation(s)
- Yan Mao
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, PR China
| | - Xiao Liang
- Faculty of Material Science and Engineering, South China University of Technology, Guangzhou 510640, PR China
| | - Junpeng Zhao
- Faculty of Material Science and Engineering, South China University of Technology, Guangzhou 510640, PR China
| | - Lingxiang Jiang
- South China Advanced Institute for Soft Matter Science and Technology (AISMST), School of Emergent Soft Matter, South China University of Technology, Guangzhou 510640, PR China
| | - Qingyou Liang
- Faculty of Material Science and Engineering, South China University of Technology, Guangzhou 510640, PR China; Analytical and Testing Center, South China University of Technology, Guangzhou 510640, PR China
| | - To Ngai
- Department of Chemistry, The Chinese University of Hong Kong, Hong Kong 999077, PR China
| | - Xiangjun Gong
- Faculty of Material Science and Engineering, South China University of Technology, Guangzhou 510640, PR China; Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou 510640, PR China.
| | - Mingxing Wu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, PR China.
| |
Collapse
|
3
|
He X, Zhang W, Feng P, Mai Z, Gong X, Zhang G. Role of Surface Coverage of Sessile Probiotics in Their Interplay with Pathogen Bacteria Investigated by Digital Holographic Microscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:17308-17317. [PMID: 37974298 DOI: 10.1021/acs.langmuir.3c02436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
The adhesion of probiotics plays an important role in the gastrointestinal tract. Understanding the effect of the coverage of colonized probiotics on enteric pathogens is critical for the design of effective probiotic therapies. In the present work, we have investigated the adaptive behaviors of the intestinal pathogenic bacteria Enterobacter sakazakii (ES) near the surfaces coated with a probiotic─Lactobacillus rhamnosus GG (LGG) as a function of surface coverage ratio (CRLGG) by using a home-setup digital holographic microscopy. It shows that ES cells can adaptively sense LGG within a distance of 4.2 μm, even at CRLGG values as low as 0.05%. The growth inhibition of ES cells slightly varies with CRLGG, but the near-surface acceleration and accumulation of ES cells have much dependence on CRLGG. As CRLGG increases from 0.05 to 24.6%, the percentage of actively swimming ES, the motion bias, the acceleration, and the interplay duration do not linearly vary with CRLGG. Instead, each of them shows an extreme at CRLGG of 13.4%, corresponding to the chemotaxis behaviors of ES cells induced by diffusing stimuli (organic acids, bacteriocins, etc.) released from LGG, which showed an extreme concentration gradient at CRLGG = 13.4% by simulations. Our study clearly demonstrates that surface coverage of sessile probiotics profoundly influences their interplay with pathogen bacteria, which should be taken into account in designing probiotic therapies.
Collapse
Affiliation(s)
- Xintong He
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Weixiong Zhang
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Pu Feng
- School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, P. R. China
| | - Zhihui Mai
- Department of Stomatology, the Third Affiliated Hospital of Sun Yat-sen University, 600 Tianhe Road, Guangzhou 510630, P. R. China
| | - Xiangjun Gong
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China
- Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates (South China University of Technology), Guangzhou 510640, P. R. China
| | - Guangzhao Zhang
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| |
Collapse
|
4
|
Ni Z, Zhang D, Zhen S, Liang X, Gong X, Zhao Z, Ding D, Feng G, Tang BZ. NIR light-driven pure organic Janus-like nanoparticles for thermophoresis-enhanced photothermal therapy. Biomaterials 2023; 301:122261. [PMID: 37531775 DOI: 10.1016/j.biomaterials.2023.122261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 07/10/2023] [Accepted: 07/28/2023] [Indexed: 08/04/2023]
Abstract
Photothermal therapy (PTT) represents a promising noninvasive tumor therapeutic modality, but the current strategies for enhancing photothermal effect have been mainly based on promoting thermal relaxation or suppressing radiative dissipation process of excited energy, leaving little room for further improvement in photothermal effect. Herein, as a proof of concept, we report the thermophoresis-enhanced photothermal effect with pure organic Janus-like nanoparticles (Janus-like NPs) for PTT. The Janus-like NPs are eccentrically loaded with compactly J-aggregated photothermal molecules (DMA-BDTO), which show red-shifted absorption wavelength and inhibited radiative decay as compared to individual molecules. Under NIR irradiation, the asymmetric heat generation at particle surface endows Janus-like NPs the active thermophoresis, which further increases collisions and converts kinetic energy into thermal energy, and Janus-like NPs exhibit significantly elevated temperature as compared to conventional NPs with homogenously distributed DMA-BDTO. Both in vitro and in vivo results confirm such thermophoresis-enhanced photothermal effect for improved PTT. Our new strategy of thermophoresis-enhanced photothermal effect shall open new insights for improving photothermal-related tumor therapy.
Collapse
Affiliation(s)
- Zhiqiang Ni
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Di Zhang
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Shijie Zhen
- Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, 541006, China
| | - Xiao Liang
- Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Xiangjun Gong
- Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Zujin Zhao
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Dan Ding
- Frontiers Science Center for Cell Responses, State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Bioactive Materials, Ministry of Education, and College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Guangxue Feng
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China.
| | - Ben Zhong Tang
- Shenzhen Institute of Aggregate Science and Technology, School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, 2001 Longxiang Boulevard, Longgang District, Shenzhen City, Guangdong, 518172, China
| |
Collapse
|
5
|
Snyder C, Centlivre JP, Bhute S, Shipman G, Friel AD, Viver T, Palmer M, Konstantinidis KT, Sun HJ, Rossello-Mora R, Nadeau J, Hedlund BP. Microbial Motility at the Bottom of North America: Digital Holographic Microscopy and Genomic Motility Signatures in Badwater Spring, Death Valley National Park. ASTROBIOLOGY 2023; 23:295-307. [PMID: 36625891 DOI: 10.1089/ast.2022.0090] [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: 06/17/2023]
Abstract
Motility is widely distributed across the tree of life and can be recognized by microscopy regardless of phylogenetic affiliation, biochemical composition, or mechanism. Microscopy has thus been proposed as a potential tool for detection of biosignatures for extraterrestrial life; however, traditional light microscopy is poorly suited for this purpose, as it requires sample preparation, involves fragile moving parts, and has a limited volume of view. In this study, we deployed a field-portable digital holographic microscope (DHM) to explore microbial motility in Badwater Spring, a saline spring in Death Valley National Park, and complemented DHM imaging with 16S rRNA gene amplicon sequencing and shotgun metagenomics. The DHM identified diverse morphologies and distinguished run-reverse-flick and run-reverse types of flagellar motility. PICRUSt2- and literature-based predictions based on 16S rRNA gene amplicons were used to predict motility genotypes/phenotypes for 36.0-60.1% of identified taxa, with the predicted motile taxa being dominated by members of Burkholderiaceae and Spirochaetota. A shotgun metagenome confirmed the abundance of genes encoding flagellar motility, and a Ralstonia metagenome-assembled genome encoded a full flagellar gene cluster. This study demonstrates the potential of DHM for planetary life detection, presents the first microbial census of Badwater Spring and brine pool, and confirms the abundance of mobile microbial taxa in an extreme environment.
Collapse
Affiliation(s)
- Carl Snyder
- Department of Physics, Portland State University, Portland, Oregon, USA
| | - Jakob P Centlivre
- School of Life Sciences, University of Nevada, Las Vegas, Las Vegas, Nevada, USA
| | - Shrikant Bhute
- School of Life Sciences, University of Nevada, Las Vegas, Las Vegas, Nevada, USA
| | - Gözde Shipman
- School of Life Sciences, University of Nevada, Las Vegas, Las Vegas, Nevada, USA
| | - Ariel D Friel
- School of Life Sciences, University of Nevada, Las Vegas, Las Vegas, Nevada, USA
| | - Tomeu Viver
- Marine Microbiology Group, Department of Animal and Microbial Biodiversity, Mediterranean Institute for Advanced Studies (CSIC-UIB), Esporles, Illes Balears, Spain
| | - Marike Palmer
- School of Life Sciences, University of Nevada, Las Vegas, Las Vegas, Nevada, USA
| | | | - Henry J Sun
- Desert Research Institute, Las Vegas, Nevada, USA
| | - Ramon Rossello-Mora
- Marine Microbiology Group, Department of Animal and Microbial Biodiversity, Mediterranean Institute for Advanced Studies (CSIC-UIB), Esporles, Illes Balears, Spain
| | - Jay Nadeau
- Department of Physics, Portland State University, Portland, Oregon, USA
| | - Brian P Hedlund
- School of Life Sciences, University of Nevada, Las Vegas, Las Vegas, Nevada, USA
- Nevada Institute of Personalized Medicine, Las Vegas, Nevada, USA
| |
Collapse
|
6
|
Abstract
<abstract>
<p>Digital holographic microscopy provides the ability to observe throughout a large volume without refocusing. This capability enables simultaneous observations of large numbers of microorganisms swimming in an essentially unconstrained fashion. However, computational tools for tracking large 4D datasets remain lacking. In this paper, we examine the errors introduced by tracking bacterial motion as 2D projections vs. 3D volumes under different circumstances: bacteria free in liquid media and bacteria near a glass surface. We find that while XYZ speeds are generally equal to or larger than XY speeds, they are still within empirical uncertainties. Additionally, when studying dynamic surface behavior, the Z coordinate cannot be neglected.</p>
</abstract>
Collapse
|