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Khan S, Nayak D, Vasudevan S. Photoacoustic Spectral Response using Ultrasound and Interferometric Sensors: A Correlation Study for a High Bandwidth Real-Time Blood Vasculature Monitoring Application in a Chick-Embryo Chorioallantoic Membrane (CAM) Model. APPLIED SPECTROSCOPY 2023; 77:1129-1137. [PMID: 37603568 DOI: 10.1177/00037028231194088] [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: 08/23/2023]
Abstract
Photoacoustic (PA) spectral response technique has shown good promise in efficient preclinical tissue diagnosis by depicting mechano-biological properties due to high spatial resolution and penetration depth. The conventional PA-based system is a pump-probe technique that utilizes neodymium-doped yttrium aluminum garnet pulsed laser as a pump and an ultrasound sensor as a probe. For biomedical studies, high-speed PA signals need to be acquired, requiring higher bandwidth ultrasound sensors. While the bandwidth increases, they exhibit a very low signal-to-noise ratio that inhibits acquiring PA signals of biomedical samples. An interferometer-based probe has recently been investigated as a potential ultrasound probe for obtaining PA signals as an alternative. This optical PA detection technique offers high sensitivity by combining low acoustic impedance with high electromechanical coupling. However, there is a lack of exploration of the same for real-time biomedical studies. This work shows the development of a homodyne Mach-Zehnder interferometer-based PA spectral response (PASR) followed by a correlation study between the conventional ultrasound sensor and the interferometer-based sensor. Further, this study demonstrates the capability of continuous monitoring of vascular growth and the effect of an antidrug (Cisplatin) on the vasculature tested on a chick-embryo chorioallantoic membrane model. PASR was able to monitor growth changes within one day, which was not possible with conventional methods. This opens up potential possibilities for using this technique in biomedical applications.
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Affiliation(s)
- Suhel Khan
- Department of Electrical Engineering, Indian Institute of Technology Indore, Indore, Madhya Pradesh, India
| | - Debasis Nayak
- Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal, Madhya Pradesh, India
| | - Srivathsan Vasudevan
- Department of Electrical Engineering, Indian Institute of Technology Indore, Indore, Madhya Pradesh, India
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2
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Photoacoustic Imaging in Biomedicine and Life Sciences. Life (Basel) 2022; 12:life12040588. [PMID: 35455079 PMCID: PMC9028050 DOI: 10.3390/life12040588] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 02/19/2022] [Indexed: 12/25/2022] Open
Abstract
Photo-acoustic imaging, also known as opto-acoustic imaging, has become a widely popular modality for biomedical applications. This hybrid technique possesses the advantages of high optical contrast and high ultrasonic resolution. Due to the distinct optical absorption properties of tissue compartments and main chromophores, photo-acoustics is able to non-invasively observe structural and functional variations within biological tissues including oxygenation and deoxygenation, blood vessels and spatial melanin distribution. The detection of acoustic waves produced by a pulsed laser source yields a high scaling range, from organ level photo-acoustic tomography to sub-cellular or even molecular imaging. This review discusses significant novel technical solutions utilising photo-acoustics and their applications in the fields of biomedicine and life sciences.
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Liu Y, Seresini T, Liu JY, Liu L, Wang F, Wang Y, Glorieux C. All-optical dynamic analysis of the photothermal and photoacoustic response of a microcantilever by laser Doppler vibrometry. PHOTOACOUSTICS 2021; 24:100299. [PMID: 34522609 PMCID: PMC8426265 DOI: 10.1016/j.pacs.2021.100299] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 08/22/2021] [Accepted: 08/30/2021] [Indexed: 05/17/2023]
Abstract
Light absorption induced thermoelastic and photoacoustic excitation, combined with laser Doppler vibrometry, was utilized to analyze the dynamic mechanical behavior of a microcantilever. The measured frequency response, modal shapes, and acoustic coupling effects were interpreted in the framework of a simple Bernouilli-Euler model and quantitative 3D finite element method (FEM) analysis. Three opto-mechanical generation mechanisms, each initiated by modulated optical absorption and heating, were identified both by an analytical and finite element model. In decreasing order of importance, optically induced cantilever bending is found to be caused by: (i) differences in photoacoustically induced pressure oscillations in the air adjacent to the illuminated and dark side of the cantilever, resulting from heat transfer from the illuminated cantilever to the nearby air, acting as a volume velocity piston, and (ii) thermoelastic stresses accompanying temperature and thermal expansion gradients in the cantilever, (iii) photoacoustically induced pressure oscillations in the air adjacent to the illuminated cantilever holder and frame.
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Affiliation(s)
- Yang Liu
- Laboratory for Soft Matter and Biophysics, Department of Physics and Astronomy, KU Leuven, Leuven, B-3001, Belgium
- State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin, 150001, China
- School of Mechatronics Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Tommaso Seresini
- Laboratory for Soft Matter and Biophysics, Department of Physics and Astronomy, KU Leuven, Leuven, B-3001, Belgium
| | - Jun-Yan Liu
- State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin, 150001, China
- School of Mechatronics Engineering, Harbin Institute of Technology, Harbin, 150001, China
- Corresponding author at: School of Mechatronics Engineering, Harbin Institute of Technology, Nangang District, Xidazhi Street 92, 150001, Harbin, Heilongjiang Province, China.
| | - Liwang Liu
- Laboratory for Soft Matter and Biophysics, Department of Physics and Astronomy, KU Leuven, Leuven, B-3001, Belgium
| | - Fei Wang
- State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin, 150001, China
- School of Mechatronics Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Yang Wang
- State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin, 150001, China
- School of Mechatronics Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Christ Glorieux
- Laboratory for Soft Matter and Biophysics, Department of Physics and Astronomy, KU Leuven, Leuven, B-3001, Belgium
- Corresponding author at: Laboratory for Soft Matter and Biophysics, Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, B-3001, Leuven, Belgium.
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Aziz A, Holthof J, Meyer S, Schmidt OG, Medina‐Sánchez M. Dual Ultrasound and Photoacoustic Tracking of Magnetically Driven Micromotors: From In Vitro to In Vivo. Adv Healthc Mater 2021; 10:e2101077. [PMID: 34382354 DOI: 10.1002/adhm.202101077] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 07/29/2021] [Indexed: 12/17/2022]
Abstract
The fast evolution of medical micro- and nanorobots in the endeavor to perform non-invasive medical operations in living organisms has boosted the use of diverse medical imaging techniques in the last years. Among those techniques, photoacoustic imaging (PAI), considered a functional technique, has shown to be promising for the visualization of micromotors in deep tissue with high spatiotemporal resolution as it possesses the molecular specificity of optical methods and the penetration depth of ultrasound. However, the precise maneuvering and function's control of medical micromotors, in particular in living organisms, require both anatomical and functional imaging feedback. Therefore, herein, the use of high-frequency ultrasound and PAI is reported to obtain anatomical and molecular information, respectively, of magnetically-driven micromotors in vitro and under ex vivo tissues. Furthermore, the steerability of the micromotors is demonstrated by the action of an external magnetic field into the uterus and bladder of living mice in real-time, being able to discriminate the micromotors' signal from one of the endogenous chromophores by multispectral analysis. Finally, the successful loading and release of a model cargo by the micromotors toward non-invasive in vivo medical interventions is demonstrated.
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Affiliation(s)
- Azaam Aziz
- Institute for Integrative Nanosciences Leibniz IFW Dresden Helmholtzstrasse 20 01069 Dresden Germany
| | - Joost Holthof
- FUJIFILM VisualSonics Inc. Amsterdam 1114 AB The Netherlands
| | - Sandra Meyer
- FUJIFILM VisualSonics Inc. Amsterdam 1114 AB The Netherlands
| | - Oliver G. Schmidt
- Institute for Integrative Nanosciences Leibniz IFW Dresden Helmholtzstrasse 20 01069 Dresden Germany
- Center for Materials, Architectures and Integration of Nanomembranes (MAIN) TU Chemnitz Reichenhainer Strasse 10 09107 Chemnitz Germany
- School of Science TU Dresden 01062 Dresden Germany
| | - Mariana Medina‐Sánchez
- Institute for Integrative Nanosciences Leibniz IFW Dresden Helmholtzstrasse 20 01069 Dresden Germany
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5
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Aziz A, Pane S, Iacovacci V, Koukourakis N, Czarske J, Menciassi A, Medina-Sánchez M, Schmidt OG. Medical Imaging of Microrobots: Toward In Vivo Applications. ACS NANO 2020; 14:10865-10893. [PMID: 32869971 DOI: 10.1021/acsnano.0c05530] [Citation(s) in RCA: 93] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Medical microrobots (MRs) have been demonstrated for a variety of non-invasive biomedical applications, such as tissue engineering, drug delivery, and assisted fertilization, among others. However, most of these demonstrations have been carried out in in vitro settings and under optical microscopy, being significantly different from the clinical practice. Thus, medical imaging techniques are required for localizing and tracking such tiny therapeutic machines when used in medical-relevant applications. This review aims at analyzing the state of the art of microrobots imaging by critically discussing the potentialities and limitations of the techniques employed in this field. Moreover, the physics and the working principle behind each analyzed imaging strategy, the spatiotemporal resolution, and the penetration depth are thoroughly discussed. The paper deals with the suitability of each imaging technique for tracking single or swarms of MRs and discusses the scenarios where contrast or imaging agent's inclusion is required, either to absorb, emit, or reflect a determined physical signal detected by an external system. Finally, the review highlights the existing challenges and perspective solutions which could be promising for future in vivo applications.
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Affiliation(s)
- Azaam Aziz
- Institute for Integrative Nanosciences, Leibniz IFW Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany
| | - Stefano Pane
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Pisa 56025, Italy
- Department of Excellence in Robotics and AI, Scuola Superiore Sant'Anna, 56127 Pisa, Italy
| | - Veronica Iacovacci
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Pisa 56025, Italy
- Department of Excellence in Robotics and AI, Scuola Superiore Sant'Anna, 56127 Pisa, Italy
| | - Nektarios Koukourakis
- Chair of Measurement and Sensor System Technique, School of Engineering, TU Dresden, Helmholtzstrasse 18, 01069 Dresden, Germany
- Center for Biomedical Computational Laser Systems, TU Dresden, 01062 Dresden, Germany
| | - Jürgen Czarske
- Chair of Measurement and Sensor System Technique, School of Engineering, TU Dresden, Helmholtzstrasse 18, 01069 Dresden, Germany
- Cluster of Excellence Physics of Life, TU Dresden, 01307 Dresden, Germany
- Center for Biomedical Computational Laser Systems, TU Dresden, 01062 Dresden, Germany
| | - Arianna Menciassi
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Pisa 56025, Italy
- Department of Excellence in Robotics and AI, Scuola Superiore Sant'Anna, 56127 Pisa, Italy
| | - Mariana Medina-Sánchez
- Institute for Integrative Nanosciences, Leibniz IFW Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany
| | - Oliver G Schmidt
- Institute for Integrative Nanosciences, Leibniz IFW Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany
- Center for Materials, Architectures, and Integration of Nanomembranes (MAIN), TU Chemnitz, Reichenhainer Strasse 10, 09107 Chemnitz, Germany
- School of Science, TU Dresden, 01062 Dresden, Germany
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6
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Anemone A, Consolino L, Arena F, Capozza M, Longo DL. Imaging tumor acidosis: a survey of the available techniques for mapping in vivo tumor pH. Cancer Metastasis Rev 2020; 38:25-49. [PMID: 30762162 PMCID: PMC6647493 DOI: 10.1007/s10555-019-09782-9] [Citation(s) in RCA: 104] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Cancer cells are characterized by a metabolic shift in cellular energy production, orchestrated by the transcription factor HIF-1α, from mitochondrial oxidative phosphorylation to increased glycolysis, regardless of oxygen availability (Warburg effect). The constitutive upregulation of glycolysis leads to an overproduction of acidic metabolic products, resulting in enhanced acidification of the extracellular pH (pHe ~ 6.5), which is a salient feature of the tumor microenvironment. Despite the importance of pH and tumor acidosis, there is currently no established clinical tool available to image the spatial distribution of tumor pHe. The purpose of this review is to describe various imaging modalities for measuring intracellular and extracellular tumor pH. For each technique, we will discuss main advantages and limitations, pH accuracy and sensitivity of the applied pH-responsive probes and potential translatability to the clinic. Particular attention is devoted to methods that can provide pH measurements at high spatial resolution useful to address the task of tumor heterogeneity and to studies that explored tumor pH imaging for assessing treatment response to anticancer therapies.
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Affiliation(s)
- Annasofia Anemone
- Molecular Imaging Center, Department of Molecular Biotechnology and Health Sciences, University of Turin, Via Nizza 52, Turin, Italy
| | - Lorena Consolino
- Molecular Imaging Center, Department of Molecular Biotechnology and Health Sciences, University of Turin, Via Nizza 52, Turin, Italy
| | - Francesca Arena
- Institute of Biostructures and Bioimaging (IBB), Italian National Research Council (CNR), Via Nizza 52, Turin, Italy.,Center for Preclinical Imaging, Department of Molecular Biotechnology and Health Sciences, University of Turin, Via Ribes 5, Colleretto Giacosa, Italy
| | - Martina Capozza
- Center for Preclinical Imaging, Department of Molecular Biotechnology and Health Sciences, University of Turin, Via Ribes 5, Colleretto Giacosa, Italy
| | - Dario Livio Longo
- Molecular Imaging Center, Department of Molecular Biotechnology and Health Sciences, University of Turin, Via Nizza 52, Turin, Italy. .,Institute of Biostructures and Bioimaging (IBB), Italian National Research Council (CNR), Via Nizza 52, Turin, Italy.
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7
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Pollok NE, Rabin C, Smith L, Crooks RM. Orientation-Controlled Bioconjugation of Antibodies to Silver Nanoparticles. Bioconjug Chem 2019; 30:3078-3086. [PMID: 31730333 PMCID: PMC6920564 DOI: 10.1021/acs.bioconjchem.9b00737] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Here we report on the use of heterobifunctional cross-linkers (HBCLs) to control the number, orientation, and activity of immunoglobulin G antibodies (Abs) conjugated to silver nanoparticles (AgNPs). A hydrazone conjugation method resulted in exclusive modification of the polysaccharide chains present on the fragment crystallizable region of the Abs, leaving the antigen-binding regions accessible. Two HBCLs, each having a hydrazide terminal group, were synthesized and tested for effectiveness. The two HBCLs differed in two respects, however: (1) either a thiol or a dithiolane group was used for attachment to the AgNP; and (2) the spacer arm was either a PEG chain or an alkyl chain. Both cross-linkers immobilized 5 ± 1 Abs on the surface of each 20-nm-diameter AgNP. Electrochemical results, obtained using a half-metalloimmunoassay, proved that Abs conjugated to AgNPs via either of the two HBCLs were 4 times more active than those conjugated by the more common physisorption technique. This finding confirmed that the HBCLs exerted orientational control over the Abs. We also demonstrated that the AgNP-HBCL-Ab conjugates were stable and active for at least 2 weeks. Finally, we found that the stability of the HBCLs themselves was related to the nature of their spacer arms. Specifically, the results showed that the HBCL having the alkyl chain is chemically stable for at least 90 days, making it the preferred cross-linker for bioassays.
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Affiliation(s)
| | | | - Leilani Smith
- Department of Chemistry, The University of Texas at Austin, 100 E. 24th St., Stop A1590, Austin, TX, 78712-1224, U.S.A
| | - Richard M. Crooks
- Department of Chemistry, The University of Texas at Austin, 100 E. 24th St., Stop A1590, Austin, TX, 78712-1224, U.S.A
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8
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Aziz A, Medina-Sánchez M, Claussen J, Schmidt OG. Real-Time Optoacoustic Tracking of Single Moving Micro-objects in Deep Phantom and Ex Vivo Tissues. NANO LETTERS 2019; 19:6612-6620. [PMID: 31411038 DOI: 10.1021/acs.nanolett.9b02869] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Medical imaging plays an important role in diagnosis and treatment of multiple diseases. It is a field which seeks for improved sensitivity and spatiotemporal resolution to allow the dynamic monitoring of diverse biological processes that occur at the micro- and nanoscale. Emerging technologies for targeted diagnosis and therapy such as nanotherapeutics, microimplants, catheters, and small medical tools also need to be precisely located and monitored while performing their function inside the human body. In this work, we show for the first time the real-time tracking of moving single micro-objects below centimeter thick phantom tissue and ex vivo chicken breast, using multispectral optoacoustic tomography (MSOT). This technique combines the advantages of ultrasound imaging regarding depth and resolution with the molecular specificity of optical methods, thereby facilitating the discrimination between the spectral signatures of the micro-objects from those of intrinsic tissue molecules. The resulting MSOT signal is further improved in terms of contrast and specificity by coating the micro-objects' surface with gold nanorods, possessing a unique absorption spectrum, which facilitate their discrimination from surrounding biological tissues when translated to future in vivo settings.
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Affiliation(s)
- Azaam Aziz
- Institute for Integrative Nanosciences , Leibniz IFW Dresden , Helmholtzstraße 20 , 01069 Dresden , Germany
| | - Mariana Medina-Sánchez
- Institute for Integrative Nanosciences , Leibniz IFW Dresden , Helmholtzstraße 20 , 01069 Dresden , Germany
| | - Jing Claussen
- iThera Medical GmbH , Zielstattstraße 13 , 81379 Munich , Germany
| | - Oliver G Schmidt
- Institute for Integrative Nanosciences , Leibniz IFW Dresden , Helmholtzstraße 20 , 01069 Dresden , Germany
- Center for Materials, Architectures, and Integration of Nanomembranes (MAIN) , TU Chemnitz , Reichenhainer Straße 10 , 09107 Chemnitz , Germany
- School of Science , TU Dresden , 01062 Dresden , Germany
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9
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Sivasubramanian M, Chuang YC, Chen NT, Lo LW. Seeing Better and Going Deeper in Cancer Nanotheranostics. Int J Mol Sci 2019; 20:E3490. [PMID: 31315232 PMCID: PMC6678689 DOI: 10.3390/ijms20143490] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2019] [Revised: 07/12/2019] [Accepted: 07/12/2019] [Indexed: 02/07/2023] Open
Abstract
Biomedical imaging modalities in clinical practice have revolutionized oncology for several decades. State-of-the-art biomedical techniques allow visualizing both normal physiological and pathological architectures of the human body. The use of nanoparticles (NP) as contrast agents enabled visualization of refined contrast images with superior resolution, which assists clinicians in more accurate diagnoses and in planning appropriate therapy. These desirable features are due to the ability of NPs to carry high payloads (contrast agents or drugs), increased in vivo half-life, and disease-specific accumulation. We review the various NP-based interventions for treatments of deep-seated tumors, involving "seeing better" to precisely visualize early diagnosis and "going deeper" to activate selective therapeutics in situ.
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Affiliation(s)
- Maharajan Sivasubramanian
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, Zhunan 350, Taiwan
| | - Yao Chen Chuang
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, Zhunan 350, Taiwan
| | - Nai-Tzu Chen
- Department of Cosmeceutics, China Medical University, Taichung 40402, Taiwan.
- Department of Biological Science and Technology, China Medical University, Taichung 40402, Taiwan.
| | - Leu-Wei Lo
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, Zhunan 350, Taiwan.
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10
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Maturi M, Locatelli E, Monaco I, Comes Franchini M. Current concepts in nanostructured contrast media development for in vivo photoacoustic imaging. Biomater Sci 2019; 7:1746-1775. [DOI: 10.1039/c8bm01444b] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
To overcome the endogenous photoacoustic contrast arising from endogenous species, specific contrast agents need to be developed, allowing PAI to successfully identify targeted contrast in the range of wavelength in which the interference from the biomatrix is minimized.
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Affiliation(s)
- Mirko Maturi
- Department of Industrial Chemistry “Toso Montanari”
- University of Bologna
- 40136 Bologna
- Italy
| | - Erica Locatelli
- Department of Industrial Chemistry “Toso Montanari”
- University of Bologna
- 40136 Bologna
- Italy
| | - Ilaria Monaco
- Department of Industrial Chemistry “Toso Montanari”
- University of Bologna
- 40136 Bologna
- Italy
| | - Mauro Comes Franchini
- Department of Industrial Chemistry “Toso Montanari”
- University of Bologna
- 40136 Bologna
- Italy
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11
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Mahmoodkalayeh S, Jooya HZ, Hariri A, Zhou Y, Xu Q, Ansari MA, Avanaki MRN. Low Temperature-Mediated Enhancement of Photoacoustic Imaging Depth. Sci Rep 2018; 8:4873. [PMID: 29559653 PMCID: PMC5861112 DOI: 10.1038/s41598-018-22898-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Accepted: 02/23/2018] [Indexed: 11/09/2022] Open
Abstract
We study the temperature dependence of the underlying mechanisms related to the signal strength and imaging depth in photoacoustic imaging. The presented theoretical and experimental results indicate that imaging depth can be improved by lowering the temperature of the intermediate medium that the laser passes through to reach the imaging target. We discuss the temperature dependency of optical and acoustic properties of the intermediate medium and their changes due to cooling. We demonstrate that the SNR improvement of the photoacoustic signal is mainly due to the reduction of Grüneisen parameter of the intermediate medium which leads to a lower level of background noise. These findings may open new possibilities toward the application of biomedical laser refrigeration.
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Affiliation(s)
- Sadreddin Mahmoodkalayeh
- Department of Biomedical Engineering, Wayne State University, Detroit, Michigan, USA.,Department of Physics, Shahid Beheshti University, Tehran, Iran.,Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
| | - Hossein Z Jooya
- Harvard-Smithsonian Center for Astrophysics, Harvard University, Cambridge, MA, USA
| | - Ali Hariri
- Department of Biomedical Engineering, Wayne State University, Detroit, Michigan, USA
| | - Yang Zhou
- Department of Biomedical Engineering, Wayne State University, Detroit, Michigan, USA
| | - Qiuyun Xu
- Department of Biomedical Engineering, Wayne State University, Detroit, Michigan, USA
| | - Mohammad A Ansari
- Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
| | - Mohammad R N Avanaki
- Department of Biomedical Engineering, Wayne State University, Detroit, Michigan, USA. .,Department of Dermatology, Wayne State University School of Medicine, Detroit, Michigan, USA. .,Barbara Ann Karmanos Cancer Institute, Detroit, Michigan, USA.
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12
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Biffi S, Petrizza L, Garrovo C, Rampazzo E, Andolfi L, Giustetto P, Nikolov I, Kurdi G, Danailov MB, Zauli G, Secchiero P, Prodi L. Multimodal near-infrared-emitting PluS Silica nanoparticles with fluorescent, photoacoustic, and photothermal capabilities. Int J Nanomedicine 2016; 11:4865-4874. [PMID: 27703352 PMCID: PMC5036595 DOI: 10.2147/ijn.s107479] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Purpose The aim of the present study was to develop nanoprobes with theranostic features, including – at the same time – photoacoustic, near-infrared (NIR) optical imaging, and photothermal properties, in a versatile and stable core–shell silica-polyethylene glycol (PEG) nanoparticle architecture. Materials and methods We synthesized core–shell silica-PEG nanoparticles by a one-pot direct micelles approach. Fluorescence emission and photoacoustic and photothermal properties were obtained at the same time by appropriate doping with triethoxysilane-derivatized cyanine 5.5 (Cy5.5) and cyanine 7 (Cy7) dyes. The performances of these nanoprobes were measured in vitro, using nanoparticle suspensions in phosphate-buffered saline and blood, dedicated phantoms, and after incubation with MDA-MB-231 cells. Results We obtained core–shell silica-PEG nanoparticles endowed with very high colloidal stability in water and in biological environment, with absorption and fluorescence emission in the NIR field. The presence of Cy5.5 and Cy7 dyes made it possible to reach a more reproducible and higher doping regime, producing fluorescence emission at a single excitation wavelength in two different channels, owing to the energy transfer processes within the nanoparticle. The nanoarchitecture and the presence of both Cy5.5 and Cy7 dyes provided a favorable agreement between fluorescence emission and quenching, to achieve optical imaging and photoacoustic and photothermal properties. Conclusion We obtained rationally designed nanoparticles with outstanding stability in biological environment. At appropriate doping regimes, the presence of Cy5.5 and Cy7 dyes allowed us to tune fluorescence emission in the NIR for optical imaging and to exploit quenching processes for photoacoustic and photothermal capabilities. These nanostructures are promising in vivo theranostic tools for the near future.
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Affiliation(s)
- Stefania Biffi
- Institute for Maternal and Child Health - IRCCS "Burlo Garofolo", Trieste
| | - Luca Petrizza
- Department of Chemistry "G Ciamician", University of Bologna, Bologna
| | - Chiara Garrovo
- Institute for Maternal and Child Health - IRCCS "Burlo Garofolo", Trieste
| | - Enrico Rampazzo
- Department of Chemistry "G Ciamician", University of Bologna, Bologna
| | | | | | | | | | | | - Giorgio Zauli
- Institute for Maternal and Child Health - IRCCS "Burlo Garofolo", Trieste
| | - Paola Secchiero
- Department of Morphology, Surgery and Experimental Medicine and LTTA Centre, University of Ferrara, Ferrara, Italy
| | - Luca Prodi
- Department of Chemistry "G Ciamician", University of Bologna, Bologna
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13
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Olefir I, Mercep E, Burton NC, Ovsepian SV, Ntziachristos V. Hybrid multispectral optoacoustic and ultrasound tomography for morphological and physiological brain imaging. JOURNAL OF BIOMEDICAL OPTICS 2016; 21:86005. [PMID: 27533442 DOI: 10.1117/1.jbo.21.8.086005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Accepted: 07/25/2016] [Indexed: 05/18/2023]
Abstract
Expanding usage of small animal models in biomedical research necessitates development of technologies for structural, functional, or molecular imaging that can be readily integrated in the biological laboratory. Herein, we consider dual multispectral optoacoustic (OA) and ultrasound tomography based on curved ultrasound detector arrays and describe the performance achieved for hybrid morphological and physiological brain imaging of mice in vivo. We showcase coregistered hemodynamic parameters resolved by OA tomography under baseline conditions and during alterations of blood oxygen saturation. As an internal reference, we provide imaging of abdominal organs. We illustrate the performance advantages of hybrid curved detector ultrasound and OA tomography and discuss immediate and long-term implications of our findings in the context of animal and human studies.
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Affiliation(s)
- Ivan Olefir
- Helmholtz Zentrum München, Institute for Biological and Medical Imaging, Ingolstädter Landstraße 1, Neuherberg 85764, GermanybTechnische Universität München, School of Bioengineering, Boltzmannstraße 11, Garching 85748, Germany
| | - Elena Mercep
- Helmholtz Zentrum München, Institute for Biological and Medical Imaging, Ingolstädter Landstraße 1, Neuherberg 85764, GermanycTechnische Universität München, Faculty of Medicine, Ismaninger Straße 22, Munich 81675, GermanydiThera Medical GmbH, Zielstattst
| | - Neal C Burton
- iThera Medical GmbH, Zielstattstrasse 13, Munich 81379, Germany
| | - Saak V Ovsepian
- Helmholtz Zentrum München, Institute for Biological and Medical Imaging, Ingolstädter Landstraße 1, Neuherberg 85764, GermanybTechnische Universität München, School of Bioengineering, Boltzmannstraße 11, Garching 85748, Germany
| | - Vasilis Ntziachristos
- Helmholtz Zentrum München, Institute for Biological and Medical Imaging, Ingolstädter Landstraße 1, Neuherberg 85764, GermanybTechnische Universität München, School of Bioengineering, Boltzmannstraße 11, Garching 85748, Germany
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14
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Lu HD, Wilson BK, Heinmiller A, Faenza B, Hejazi S, Prud'homme RK. Narrow Absorption NIR Wavelength Organic Nanoparticles Enable Multiplexed Photoacoustic Imaging. ACS APPLIED MATERIALS & INTERFACES 2016; 8:14379-14388. [PMID: 27153806 DOI: 10.1021/acsami.6b03059] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Photoacoustic (PA) imaging is an emerging hybrid optical-ultrasound based imaging technique that can be used to visualize optical absorbers in deep tissue. Free organic dyes can be used as PA contrast agents to concurrently provide additional physiological and molecular information during imaging, but their use in vivo is generally limited by rapid renal clearance for soluble dyes and by the difficulty of delivery for hydrophobic dyes. We here report the use of the block copolymer directed self-assembly process, Flash NanoPrecipitation (FNP), to form series of highly hydrophobic optical dyes into stable, biocompatible, and water-dispersible nanoparticles (NPs) with sizes from 38 to 88 nm and with polyethylene glycol (PEG) surface coatings suitable for in vivo use. The incorporation of dyes with absorption profiles within the infrared range, that is optimal for PA imaging, produces the PA activity of the particles. The hydrophobicity of the dyes allows their sequestration in the NP cores, so that they do not interfere with targeting, and high loadings of >75 wt % dye are achieved. The optical extinction coefficients (ε (mL mg(-1) cm(-1))) were essentially invariant to the loading of the dye in NP core. Co-encapsulation of dye with vitamin E or polystyrene demonstrates the ability to simultaneously image and deliver a second agent. The PEG chains on the NP surface were functionalized with folate to demonstrate folate-dependent targeting. The spectral separation of different dyes among different sets of particles enables multiplexed imaging, such as the simultaneous imaging of two sets of particles within the same animal. We provide the first demonstration of this capability with PA imaging, by simultaneously imaging nontargeted and folate-targeted nanoparticles within the same animal. These results highlight Flash NanoPrecipitation as a platform to develop photoacoustic tools with new diagnostic capabilities.
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Affiliation(s)
- Hoang D Lu
- Department of Chemical and Biological Engineering, Princeton University , Princeton, New Jersey 08544, United States
| | - Brian K Wilson
- Department of Chemical and Biological Engineering, Princeton University , Princeton, New Jersey 08544, United States
| | | | - Bill Faenza
- Persis Science , Andreas, Pennsylvania 18211, United States
| | - Shahram Hejazi
- Optimeos Life Sciences LLC , Princeton, New Jersey 08544, United States
| | - Robert K Prud'homme
- Department of Chemical and Biological Engineering, Princeton University , Princeton, New Jersey 08544, United States
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15
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Abstract
This review elaborates on the possible applications of nanomaterials in optogenetics and analyses the benefits of nanomaterial-mediated optogenetics.
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Affiliation(s)
- Kai Huang
- Department of Biomedical Engineering
- National University of Singapore
- Singapore 117576
- Singapore
| | - Qingqing Dou
- Institute of Materials Research and Engineering
- A*STAR (Agency for Science, Technology and Research)
- Singapore 138634
- Singapore
| | - Xian Jun Loh
- Institute of Materials Research and Engineering
- A*STAR (Agency for Science, Technology and Research)
- Singapore 138634
- Singapore
- Department of Materials Science and Engineering
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