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Cheng W, Tang X, Feng S, Zhang Z, Liu W. Influence of immunodeficiency on spring-assisted cranioplasty: A study in mice. Curr Probl Surg 2024; 61:101508. [PMID: 39098332 DOI: 10.1016/j.cpsurg.2024.101508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Revised: 04/16/2024] [Accepted: 04/18/2024] [Indexed: 08/06/2024]
Affiliation(s)
- Wenjie Cheng
- Department of Craniomaxillofacial Surgery, Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China 100043
| | - Xiaojun Tang
- Department of Craniomaxillofacial Surgery, Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China 100043
| | - Shi Feng
- Department of Craniomaxillofacial Surgery, Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China 100043
| | - Zhiyong Zhang
- Department of Craniomaxillofacial Surgery, Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China 100043
| | - Wei Liu
- Department of Craniomaxillofacial Surgery, Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China 100043.
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2
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Miron RJ, Fujioka-Kobayashi M, Sculean A, Zhang Y. Optimization of platelet-rich fibrin. Periodontol 2000 2024; 94:79-91. [PMID: 37681522 DOI: 10.1111/prd.12521] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Revised: 07/25/2023] [Accepted: 08/09/2023] [Indexed: 09/09/2023]
Abstract
The use of platelet-rich fibrin (PRF) has gained tremendous popularity in recent years owing to its ability to speed wound healing postsurgery. However, to date, many clinicians are unaware of methods designed to optimize the technology. This overview article will discuss the advancements and improvements made over the years aimed at maximizing cell and growth factor concentrations. First, a general understanding explaining the differences between RPM and RCF (g-force) is introduced. Then, the low-speed centrifugation concept, fixed angle versus horizontal centrifugation, and methods to maximize platelet concentrations using optimized protocols will be discussed in detail. Thereafter, the importance of chemically modified PRF tubes without the addition of chemical additives, as well as regulation of temperature to induce/delay clotting, will be thoroughly described. This article is a first of its kind summarizing all recent literature on PRF designed to optimize PRF production for clinical treatment.
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Affiliation(s)
- Richard J Miron
- Department of Periodontology, University of Bern, Bern, Switzerland
| | - Masako Fujioka-Kobayashi
- Department of Oral and Maxillofacial Surgery, School of Life Dentistry at Tokyo, The Nippon Dental University, Tokyo, Japan
| | - Anton Sculean
- Department of Periodontology, University of Bern, Bern, Switzerland
| | - Yufeng Zhang
- Department of Oral Implantology, University of Wuhan, Wuhan, China
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3
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Qureshi MM, Allam N, Im J, Kwon HS, Chung E, Vitkin IA. Advances in laser speckle imaging: From qualitative to quantitative hemodynamic assessment. JOURNAL OF BIOPHOTONICS 2024; 17:e202300126. [PMID: 37545037 DOI: 10.1002/jbio.202300126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 07/03/2023] [Accepted: 07/27/2023] [Indexed: 08/08/2023]
Abstract
Laser speckle imaging (LSI) techniques have emerged as a promising method for visualizing functional blood vessels and tissue perfusion by analyzing the speckle patterns generated by coherent light interacting with living biological tissue. These patterns carry important biophysical tissue information including blood flow dynamics. The noninvasive, label-free, and wide-field attributes along with relatively simple instrumental schematics make it an appealing imaging modality in preclinical and clinical applications. The review outlines the fundamentals of speckle physics and the three categories of LSI techniques based on their degree of quantification: qualitative, semi-quantitative and quantitative. Qualitative LSI produces microvascular maps by capturing speckle contrast variations between blood vessels containing moving red blood cells and the surrounding static tissue. Semi-quantitative techniques provide a more accurate analysis of blood flow dynamics by accounting for the effect of static scattering on spatiotemporal parameters. Quantitative LSI such as optical speckle image velocimetry provides quantitative flow velocity measurements, which is inspired by the particle image velocimetry in fluid mechanics. Additionally, discussions regarding the prospects of future innovations in LSI techniques for optimizing the vascular flow quantification with associated clinical outlook are presented.
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Affiliation(s)
- Muhammad Mohsin Qureshi
- Division of Biophysics and Bioimaging, Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | - Nader Allam
- Division of Biophysics and Bioimaging, Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - Jeongmyo Im
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Republic of Korea
| | - Hyuk-Sang Kwon
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Republic of Korea
| | - Euiheon Chung
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Republic of Korea
- AI Graduate School, Gwangju Institute of Science and Technology, Gwangju, Republic of Korea
| | - I Alex Vitkin
- Division of Biophysics and Bioimaging, Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
- Department of Radiation Oncology, University of Toronto, Toronto, Canada
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4
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Pereira M, Pinto J, Arteaga B, Guerra A, Jorge RN, Monteiro FJ, Salgado CL. A Comprehensive Look at In Vitro Angiogenesis Image Analysis Software. Int J Mol Sci 2023; 24:17625. [PMID: 38139453 PMCID: PMC10743557 DOI: 10.3390/ijms242417625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 12/11/2023] [Accepted: 12/14/2023] [Indexed: 12/24/2023] Open
Abstract
One of the complex challenges faced presently by tissue engineering (TE) is the development of vascularized constructs that accurately mimic the extracellular matrix (ECM) of native tissue in which they are inserted to promote vessel growth and, consequently, wound healing and tissue regeneration. TE technique is characterized by several stages, starting from the choice of cell culture and the more appropriate scaffold material that can adequately support and supply them with the necessary biological cues for microvessel development. The next step is to analyze the attained microvasculature, which is reliant on the available labeling and microscopy techniques to visualize the network, as well as metrics employed to characterize it. These are usually attained with the use of software, which has been cited in several works, although no clear standard procedure has been observed to promote the reproduction of the cell response analysis. The present review analyzes not only the various steps previously described in terms of the current standards for evaluation, but also surveys some of the available metrics and software used to quantify networks, along with the detection of analysis limitations and future improvements that could lead to considerable progress for angiogenesis evaluation and application in TE research.
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Affiliation(s)
- Mariana Pereira
- i3S—Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal; (M.P.); (J.P.); (B.A.); (F.J.M.)
- INEB—Instituto de Engenharia Biomédica, Universidade do Porto, 4200-135 Porto, Portugal
| | - Jéssica Pinto
- i3S—Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal; (M.P.); (J.P.); (B.A.); (F.J.M.)
- INEB—Instituto de Engenharia Biomédica, Universidade do Porto, 4200-135 Porto, Portugal
| | - Belén Arteaga
- i3S—Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal; (M.P.); (J.P.); (B.A.); (F.J.M.)
- INEB—Instituto de Engenharia Biomédica, Universidade do Porto, 4200-135 Porto, Portugal
- Faculty of Medicine, University of Granada, Parque Tecnológico de la Salud, Av. de la Investigación 11, 18016 Granada, Spain
| | - Ana Guerra
- INEGI—Instituto de Ciência e Inovação em Engenharia Mecânica e Engenharia Industrial, 4200-465 Porto, Portugal; (A.G.); (R.N.J.)
| | - Renato Natal Jorge
- INEGI—Instituto de Ciência e Inovação em Engenharia Mecânica e Engenharia Industrial, 4200-465 Porto, Portugal; (A.G.); (R.N.J.)
- LAETA—Laboratório Associado de Energia, Transportes e Aeronáutica, Universidade do Porto, 4200-165 Porto, Portugal
- FEUP—Faculdade de Engenharia, Departamento de Engenharia Metalúrgica e de Materiais, Universidade do Porto, 4200-165 Porto, Portugal
| | - Fernando Jorge Monteiro
- i3S—Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal; (M.P.); (J.P.); (B.A.); (F.J.M.)
- INEB—Instituto de Engenharia Biomédica, Universidade do Porto, 4200-135 Porto, Portugal
- FEUP—Faculdade de Engenharia, Departamento de Engenharia Metalúrgica e de Materiais, Universidade do Porto, 4200-165 Porto, Portugal
- PCCC—Porto Comprehensive Cancer Center, 4200-072 Porto, Portugal
| | - Christiane Laranjo Salgado
- i3S—Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal; (M.P.); (J.P.); (B.A.); (F.J.M.)
- INEB—Instituto de Engenharia Biomédica, Universidade do Porto, 4200-135 Porto, Portugal
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5
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Sisubalan N, Shalini R, Ramya S, Sivamaruthi BS, Chaiyasut C. Recent advances in nanomaterials for neural applications: opportunities and challenges. Nanomedicine (Lond) 2023; 18:1979-1994. [PMID: 38078433 DOI: 10.2217/nnm-2023-0261] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2023] Open
Abstract
Nanomedicines are promising for delivering drugs to the central nervous system, though their precision is still being improved. Fortifying nanoparticles with vital molecules can interact with the blood-brain barrier, enabling access to brain tissue. This study summarizes recent advances in nanomedicine to treat neurological complications. The integration of nanotechnology into cell biology aids in the study of brain cells' interactions. Magnetic microhydrogels have exhibited superior neuron activation compared with superparamagnetic iron oxide nanoparticles and hold promise for neuropsychiatric disorders. Nanomaterials have shown notable results, such as tackling neurodegenerative diseases by hindering harmful protein buildup and regulating cellular processes. However, further studies of the safety and effectiveness of nanoparticles in managing neurological diseases and disorders are still required.
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Affiliation(s)
- Natarajan Sisubalan
- Office of Research Administration, Chiang Mai University, Chiang Mai, 50200, Thailand
- Innovation Center for Holistic Health, Nutraceuticals, and Cosmeceuticals, Faculty of Pharmacy, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Ramadoss Shalini
- Department of Botany, Bishop Heber College (Autonomous), Affiliated to Bharathidasan University, Tiruchirappalli, Tamil Nadu, 620017, India
| | - Sakthivel Ramya
- Department of Botany, Bishop Heber College (Autonomous), Affiliated to Bharathidasan University, Tiruchirappalli, Tamil Nadu, 620017, India
| | - Bhagavathi Sundaram Sivamaruthi
- Office of Research Administration, Chiang Mai University, Chiang Mai, 50200, Thailand
- Innovation Center for Holistic Health, Nutraceuticals, and Cosmeceuticals, Faculty of Pharmacy, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Chaiyavat Chaiyasut
- Innovation Center for Holistic Health, Nutraceuticals, and Cosmeceuticals, Faculty of Pharmacy, Chiang Mai University, Chiang Mai, 50200, Thailand
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Hou H, Tang Y, Coole JB, Kortum A, Schwarz RA, Carns J, Gillenwater AM, Ramalingam P, Milbourne A, Salcedo MP, Schmeler KM, Richards-Kortum RR. Scanning darkfield high-resolution microendoscope for label-free microvascular imaging. BIOMEDICAL OPTICS EXPRESS 2023; 14:5097-5112. [PMID: 37854554 PMCID: PMC10581811 DOI: 10.1364/boe.498584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 08/31/2023] [Accepted: 09/01/2023] [Indexed: 10/20/2023]
Abstract
Characterization of microvascular changes during neoplastic progression has the potential to assist in discriminating precancer and early cancer from benign lesions. Here, we introduce a novel high-resolution microendoscope that leverages scanning darkfield reflectance imaging to characterize angiogenesis without exogenous contrast agents. Scanning darkfield imaging is achieved by coupling programmable illumination with a complementary metal-oxide semiconductor (CMOS) camera rolling shutter, eliminating the need for complex optomechanical components and making the system portable, low-cost (<$5,500) and simple to use. Imaging depth is extended by placing a gradient-index (GRIN) lens at the distal end of the imaging fiber to resolve subepithelial microvasculature. We validated the capability of the scanning darkfield microendoscope to visualize microvasculature at different anatomic sites in vivo by imaging the oral cavity of healthy volunteers. Images of cervical specimens resected for suspected neoplasia reveal distinct microvascular patterns in columnar and squamous epithelium with different grades of precancer, indicating the potential of scanning darkfield microendoscopy to aid in efforts to prevent cervical cancer through early diagnosis.
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Affiliation(s)
- Huayu Hou
- Department of Bioengineering, Rice University, Houston, TX 77005, USA
| | - Yubo Tang
- Department of Bioengineering, Rice University, Houston, TX 77005, USA
| | - Jackson B. Coole
- Department of Bioengineering, Rice University, Houston, TX 77005, USA
| | - Alex Kortum
- Department of Bioengineering, Rice University, Houston, TX 77005, USA
| | | | - Jennifer Carns
- Department of Bioengineering, Rice University, Houston, TX 77005, USA
| | - Ann M. Gillenwater
- Department of Head and Neck Surgery, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Preetha Ramalingam
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Andrea Milbourne
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Mila P. Salcedo
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
- Department of Obstetrics and Gynecology, Federal University of Health Sciences of Porto Alegre (UFCSPA)/Santa Casa Hospital of Porto Alegre, Porto Alegre, Brazil
| | - Kathleen M. Schmeler
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
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7
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Chamaani S, Sachs J, Prokhorova A, Smeenk C, Wegner TE, Helbig M. Microwave Angiography by Ultra-Wideband Sounding: A Preliminary Investigation. Diagnostics (Basel) 2023; 13:2950. [PMID: 37761317 PMCID: PMC10528261 DOI: 10.3390/diagnostics13182950] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 09/02/2023] [Accepted: 09/11/2023] [Indexed: 09/29/2023] Open
Abstract
Angiography is a very informative method for physicians such as cardiologists, neurologists and neuroscientists. The current modalities experience some shortages, e.g., ultrasound is very operator dependent. The computerized tomography (CT) and magnetic resonance (MR) angiography are very expensive and near infrared spectroscopy cannot capture the deep arteries. Microwave technology has the potential to address some of these issues while compromising between operator dependency, cost, speed, penetration depth and resolution. This paper studies the feasibility of microwave signals for monitoring of arteries. To this aim, a homogenous phantom mimicking body tissue is built. Four elastic tubes simulate arteries and a mechanical system creates pulsations in these arteries. A multiple input multiple output (MIMO) array of ultra-wideband (UWB) transmitters and receivers illuminates the phantom and captures the reflected signals over the desired observation time period. Since we are only interested in the imaging of dynamic parts, i.e., arteries, the static clutters can be suppressed easily by background subtraction method. To obtain a fast image of arteries, which are pulsating with the heartbeat rate, we calculate the Fourier transform of each channel of the MIMO system over the observation time and apply delay and sum (DAS) beamforming method on the heartbeat rate aligned spectral component. The results show that the lateral and longitudinal images and motion mode (M-mode) time series of different points of phantom have the potential to be used for diagnosis.
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Affiliation(s)
- Somayyeh Chamaani
- Time Domain Electromagnetics Laboratory, Faculty of Electrical Engineering, K. N. Toosi University of Technology, Tehran 16317, Iran
| | - Jürgen Sachs
- Electronic Measurements and Signal Processing Group, Technische Universität Ilmenau, 98693 Ilmenau, Germany; (J.S.); (C.S.); (T.E.W.)
- ILMSENS GmbH, 98693 Ilmenau, Germany
| | - Alexandra Prokhorova
- Biosignal Processing Group, Technische Universität Ilmenau, 98693 Ilmenau, Germany;
| | - Carsten Smeenk
- Electronic Measurements and Signal Processing Group, Technische Universität Ilmenau, 98693 Ilmenau, Germany; (J.S.); (C.S.); (T.E.W.)
| | - Tim Erich Wegner
- Electronic Measurements and Signal Processing Group, Technische Universität Ilmenau, 98693 Ilmenau, Germany; (J.S.); (C.S.); (T.E.W.)
| | - Marko Helbig
- Biosignal Processing Group, Technische Universität Ilmenau, 98693 Ilmenau, Germany;
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8
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Everts PA, Lana JF, Onishi K, Buford D, Peng J, Mahmood A, Fonseca LF, van Zundert A, Podesta L. Angiogenesis and Tissue Repair Depend on Platelet Dosing and Bioformulation Strategies Following Orthobiological Platelet-Rich Plasma Procedures: A Narrative Review. Biomedicines 2023; 11:1922. [PMID: 37509560 PMCID: PMC10377284 DOI: 10.3390/biomedicines11071922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 07/03/2023] [Accepted: 07/05/2023] [Indexed: 07/30/2023] Open
Abstract
Angiogenesis is the formation of new blood vessel from existing vessels and is a critical first step in tissue repair following chronic disturbances in healing and degenerative tissues. Chronic pathoanatomic tissues are characterized by a high number of inflammatory cells; an overexpression of inflammatory mediators; such as tumor necrosis factor-α (TNF-α) and interleukin-1 (IL-1); the presence of mast cells, T cells, reactive oxygen species, and matrix metalloproteinases; and a decreased angiogenic capacity. Multiple studies have demonstrated that autologous orthobiological cellular preparations (e.g., platelet-rich plasma (PRP)) improve tissue repair and regenerate tissues. There are many PRP devices on the market. Unfortunately, they differ greatly in platelet numbers, cellular composition, and bioformulation. PRP is a platelet concentrate consisting of a high concentration of platelets, with or without certain leukocytes, platelet-derived growth factors (PGFs), cytokines, molecules, and signaling cells. Several PRP products have immunomodulatory capacities that can influence resident cells in a diseased microenvironment, inducing tissue repair or regeneration. Generally, PRP is a blood-derived product, regardless of its platelet number and bioformulation, and the literature indicates both positive and negative patient treatment outcomes. Strangely, the literature does not designate specific PRP preparation qualifications that can potentially contribute to tissue repair. Moreover, the literature scarcely addresses the impact of platelets and leukocytes in PRP on (neo)angiogenesis, other than a general one-size-fits-all statement that "PRP has angiogenic capabilities". Here, we review the cellular composition of all PRP constituents, including leukocytes, and describe the importance of platelet dosing and bioformulation strategies in orthobiological applications to initiate angiogenic pathways that re-establish microvasculature networks, facilitating the supply of oxygen and nutrients to impaired tissues.
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Affiliation(s)
- Peter A Everts
- Research & Education Division, Gulf Coast Biologics, Fort Myers, FL 33916, USA
- OrthoRegen Group, Max-Planck University, Indaiatuba, São Paulo 13334-170, Brazil
| | - José Fábio Lana
- OrthoRegen Group, Max-Planck University, Indaiatuba, São Paulo 13334-170, Brazil
- Department of Orthopaedics, The Bone and Cartilage Institute, Indaiatuba, São Paulo 13334-170, Brazil
| | - Kentaro Onishi
- Department of PM&R and Orthopedic Surgery, University of Pittsburg Medical Center, Pittsburgh, PA 15213, USA
| | - Don Buford
- Texas Orthobiologics, Dallas, TX 75204, USA
| | - Jeffrey Peng
- Stanford Health Care-O'Connor Hospital Sports Medicine, Stanford University School of Medicine, San Jose, CA 95128, USA
| | - Ansar Mahmood
- Department of Trauma and Orthopaedic Surgery, University Hospitals, Birmingham B15 2GW, UK
| | - Lucas F Fonseca
- Department of Orthopaedics, The Federal University of São Paulo, São Paulo 04024-002, Brazil
| | - Andre van Zundert
- Department of Anaesthesia and Perioperative Medicine, Royal Brisbane and Women's Hospital, Brisbane and the University of Queensland, Brisbane 4072, Australia
| | - Luga Podesta
- Bluetail Medical Group & Podesta Orthopedic Sports Medicine, Naples, FL 34109, USA
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9
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Jo S, Sun IC, Ahn CH, Lee S, Kim K. Recent Trend of Ultrasound-Mediated Nanoparticle Delivery for Brain Imaging and Treatment. ACS APPLIED MATERIALS & INTERFACES 2023; 15:120-137. [PMID: 35184560 DOI: 10.1021/acsami.1c22803] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
In view of the fact that the blood-brain barrier (BBB) prevents the transport of imaging probes and therapeutic agents to the brain and thus hinders the diagnosis and treatment of brain-related disorders, methods of circumventing this problem (e.g., ultrasound-mediated nanoparticle delivery) have drawn much attention. Among the related techniques, focused ultrasound (FUS) is a favorite means of enhancing drug delivery via transient BBB opening. Photoacoustic brain imaging relies on the conversion of light into heat and the detection of ultrasound signals from contrast agents, offering the benefits of high resolution and large penetration depth. The extensive versatility and adjustable physicochemical properties of nanoparticles make them promising therapeutic agents and imaging probes, allowing for successful brain imaging and treatment through the combined action of ultrasound and nanoparticulate agents. FUS-induced BBB opening enables nanoparticle-based drug delivery systems to efficiently access the brain. Moreover, photoacoustic brain imaging using nanoparticle-based contrast agents effectively visualizes brain morphologies or diseases. Herein, we review the progress in the simultaneous use of nanoparticles and ultrasound in brain research, revealing the potential of ultrasound-mediated nanoparticle delivery for the effective diagnosis and treatment of brain disorders.
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Affiliation(s)
- SeongHoon Jo
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, 5, Hwarang-ro, Seongbuk-gu, Seoul 02792, Republic of Korea
- Research Institute of Advanced Materials (RIAM), Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul08826, Republic of Korea
| | - In-Cheol Sun
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, 5, Hwarang-ro, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Cheol-Hee Ahn
- Research Institute of Advanced Materials (RIAM), Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul08826, Republic of Korea
| | - Sangmin Lee
- Department of Pharmacy, College of Pharmacy, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul02447, Korea
| | - Kwangmeyung Kim
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, 5, Hwarang-ro, Seongbuk-gu, Seoul 02792, Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
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10
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Ren Y, Senarathna J, Grayson WL, Pathak AP. State-of-the-art techniques for imaging the vascular microenvironment in craniofacial bone tissue engineering applications. Am J Physiol Cell Physiol 2022; 323:C1524-C1538. [PMID: 36189973 PMCID: PMC9829486 DOI: 10.1152/ajpcell.00195.2022] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 09/07/2022] [Accepted: 09/27/2022] [Indexed: 01/21/2023]
Abstract
Vascularization is a crucial step during musculoskeletal tissue regeneration via bioengineered constructs or grafts. Functional vasculature provides oxygen and nutrients to the graft microenvironment, facilitates wound healing, enhances graft integration with host tissue, and ensures the long-term survival of regenerating tissue. Therefore, imaging de novo vascularization (i.e., angiogenesis), changes in microvascular morphology, and the establishment and maintenance of perfusion within the graft site (i.e., vascular microenvironment or VME) can provide essential insights into engraftment, wound healing, as well as inform the design of tissue engineering (TE) constructs. In this review, we focus on state-of-the-art imaging approaches for monitoring the VME in craniofacial TE applications, as well as future advances in this field. We describe how cutting-edge in vivo and ex vivo imaging methods can yield invaluable information regarding VME parameters that can help characterize the effectiveness of different TE constructs and iteratively inform their design for enhanced craniofacial bone regeneration. Finally, we explicate how the integration of novel TE constructs, preclinical model systems, imaging techniques, and systems biology approaches could usher in an era of "image-based tissue engineering."
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Affiliation(s)
- Yunke Ren
- Department of Biomedical Engineering, the Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Janaka Senarathna
- Russell H. Morgan Department of Radiology and Radiological Sciences, the Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Warren L Grayson
- Department of Biomedical Engineering, the Johns Hopkins University School of Medicine, Baltimore, Maryland
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, Maryland
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland
- Translational Tissue Engineering Center, Johns Hopkins University, Baltimore, Maryland
- Institute for Nanobiotechnology, Johns Hopkins University, Baltimore, Maryland
| | - Arvind P Pathak
- Russell H. Morgan Department of Radiology and Radiological Sciences, the Johns Hopkins University School of Medicine, Baltimore, Maryland
- Department of Biomedical Engineering, the Johns Hopkins University School of Medicine, Baltimore, Maryland
- Sidney Kimmel Comprehensive Cancer Center, the Johns Hopkins University School of Medicine, Baltimore, Maryland
- Department of Electrical Engineering, Johns Hopkins University, Baltimore, Maryland
- Institute for Nanobiotechnology, Johns Hopkins University, Baltimore, Maryland
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11
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Shi S, Sharifi N, Chen Y, Yao X. Tension-Relaxation In Vivo Computing Principle for Tumor Sensitization and Targeting. IEEE TRANSACTIONS ON CYBERNETICS 2022; 52:9145-9156. [PMID: 33600339 DOI: 10.1109/tcyb.2021.3052731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
By modeling the tumor sensitization and targeting (TST) as a natural computational process, we have proposed the framework of nanorobots-assisted in vivo computation. The externally manipulable nanorobots are steered to detect the tumor in the high-risk tissue, which is analogous to the process of searching for the optimal solution by the computing agents in the search space. To overcome the constraint of a nanorobotic platform that can only generate a uniform magnetic field to actuate the nanorobots, we have proposed the weak priority evolution strategy (WP-ES) in our previous works. However, these works do not consider the proportions of the nanorobot control and tracking operations, which are part and parcel of in vivo computation as the control operation aims at searching for the tumor effectively while the tracking mode is used for gathering information about the biological gradient function (BGF). Careful planning about the durations spent in these operations is needed for optimal performance of the TST strategy. To account for this issue, in the current article, we propose a novel computational principle, called the tension-relaxation (T-R) principle, to balance the displacements of nanorobots during each control and tracking cycle. Furthermore, we build three tumor vascular models with different sizes to represent three different targeting regions as the morphology of tumor vasculature determined by the tumor growth process is an important factor affecting TST. We carry out the computational experiments for tumors with three different sizes for several representative landscapes by introducing the T-R principle into the WP-ES-based swarm intelligence algorithms and considering the realistic internal constraints. The experimental outcomes demonstrate the effectiveness of the proposed TST strategy.
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12
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Ali M, Chen Y, Cree MJ, Zhang M. In vivo computation with sensor fusion and search acceleration for smart tumor homing. Comput Biol Med 2022; 148:105887. [PMID: 35901535 DOI: 10.1016/j.compbiomed.2022.105887] [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: 06/15/2022] [Revised: 06/30/2022] [Accepted: 07/16/2022] [Indexed: 11/19/2022]
Abstract
BACKGROUND AND OBJECTIVE Motivated by the advancements on bioresorbable nanoswimmers, this paper considers the advantages of direct targeting over systemic targeting for smart tumor homing under the general framework of computational nanobiosensing. Nanoswimmers assembled by magnetic nanoparticles can be used as contrast agents to estimate the locations of tumors inside the human body. METHODS Closely observing the response of nanoswimmers (which act as in vivo biosensors) to the tumor-triggered biological gradients and then guiding them through external manipulation, can result in a higher accumulation at the diseased location. Sensor informatics along with data fusion can play a crucial role in such a knowledge-aided targeting process. Specifically, built upon our previous work on direct targeting inspired by the gradient descent optimization, this work is focused on resolving the real-life constraints of in vivo natural computation such as uniformity of the magnetic field and finite life span of the nanoswimmers. To overcome these challenges, we propose a multi-estimate-fusion strategy to obtain a common steering direction for the swarm of nanoswimmers. RESULTS We show through computational experiments (1) that the mean of individual gradient estimations provides the best choice for symmetrical conditions (tumor location in line with the direction of blood flow) while leader-based swarm steering gives the best results for non-symmetrical search space, and (2) that the iterative memory-driven gradient descent optimization detects the target faster compared to the classical memory-less gradient descent and knowledge-less systemic targeting. CONCLUSION Our proposed strategies demonstrate that a clear demarcation between malignant tumors and healthy tissues can be visualized before nanoswimmers are consumed in human vasculature. We believe that our work will help in overcoming the challenges posed by natural in vivo computation for tumor diagnosis at its early stage.
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Affiliation(s)
- Muhammad Ali
- School of Engineering, The University of Waikato, Hamilton, 3240, New Zealand
| | - Yifan Chen
- School of Engineering, The University of Waikato, Hamilton, 3240, New Zealand; School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, 610054, China.
| | - Michael J Cree
- School of Engineering, The University of Waikato, Hamilton, 3240, New Zealand
| | - Mengjie Zhang
- Evolutionary Computation Research Group, School of Engineering and Computer Science, Victoria University of Wellington, Wellington, 6140, New Zealand
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13
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Li Z, Wang S, Liu S, Xu Z, Yi X, Wang H, Dang J, Wei X, Feng B, Liu Z, Zhao M, Wu Q, Hu D. New insights into aging-associated characteristics of female subcutaneous adipose tissue through integrative analysis of multi-omics data. Bioengineered 2022; 13:2044-2057. [PMID: 35001792 PMCID: PMC8973830 DOI: 10.1080/21655979.2021.2020467] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Aging could be critical in limiting the application of subcutaneous adipose tissue (SAT) in tissue repair and reconstruction. However, no systematic study on the characteristics of SAT aging has been conducted. In this study, a scanning electronic microscope was used to detect the structural and compositional changes of SAT collected from nine females in three age groups. Multi-omics data of SAT from 37 females were obtained from Gene Expression Omnibus database, and 1860 genes, 56 miRNAs, and 332 methylated genes were identified as being differentially expressed during aging among non-obese females. Using Weighted Correlation Network Analysis (WGCNA), 1754 DEGs were defined as aging-associated genes for non-obese females, distributed among ten co-expression modules. Through Gene Ontology enrichment analysis and Gene Set enrichment analysis on those aging-associated DEGs, SAT aging was observed to be characterized by variations in immune and inflammatory states, mitochondria, lipid and carbohydrate metabolism, and regulation of vascular development. SUPV3L1, OGT, and ARPC1B were identified as conserved and core SAT-aging-related genes, as verified by RT-qPCR among 18 samples in different age groups. Multi-omics regulatory networks of core aging-associated biological processes of SAT were also constructed. Based on WGCNA, we performed differential co-expression analysis to unveil the differences in aging-related co-expression patterns between obese and non-obese females and determined that obesity could be an important accelerating factor in aging processes. Our work provides a landscape of SAT aging, which could be helpful for further research in fields such as repair and reconstruction as well as aging.
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Affiliation(s)
- Zichao Li
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Shun Wang
- BD Life Science (Guangzhou) Co., Guangzhou Laidi Innovation and Technology Park, Guangzhou, Guangdong, China
| | - Shaojie Liu
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Ziwen Xu
- Department of Basic Medicine, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Xiaowei Yi
- West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Hongtao Wang
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Juanli Dang
- Department of Plastic and Reconstructive Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Xinxin Wei
- School of Stomatology, Jiamusi University, Jiamusi, Heilongjiang, China
| | - Bingyue Feng
- Department of Basic Medicine, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Zinuo Liu
- Department of Basic Medicine, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Ming Zhao
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Qiong Wu
- Provincial Key Laboratory of Biotechnology of Shaanxi, Key Laboratory of Resource Biology and Modern Biotechnology in Western China, Faculty of Life Science, Northwest University, Xi'an, Shaanxi Province, China
| | - Dahai Hu
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
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14
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Liu YH, Brunner LM, Rebling J, Ben-Yehuda Greenwald M, Werner S, Detmar M, Razansky D. Non-invasive longitudinal imaging of VEGF-induced microvascular alterations in skin wounds. Theranostics 2022; 12:558-573. [PMID: 34976201 PMCID: PMC8692907 DOI: 10.7150/thno.65287] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 10/03/2021] [Indexed: 12/19/2022] Open
Abstract
Background: Microcirculation is essential for skin homeostasis and repair. A variety of growth factors have been identified as important regulators of wound healing. However, direct observation and longitudinal monitoring of skin remodeling in an unperturbed in vivo environment remains challenging. Methods: We report on non-invasive longitudinal imaging of the wound healing process in transgenic mice overexpressing vascular endothelial growth factor A (VEGF-A) in keratinocytes by means of large-scale optoacoustic microscopy (LSOM). This rapid, label-free, high throughput intravital microscopy method averts the use of dorsal skin-fold chambers, allowing for fully non-invasive repeated imaging of intact wounds with capillary resolution over field-of-view spanning several centimeters. Results: We observed VEGF-driven enhancement of dermal vascularization in ears, dorsal skin and healing wounds and quantified the hemoglobin content, fill fraction, vessel diameter and tortuosity. The in vivo findings were further corroborated by detailed side-by-side classical histological whole-mount vascular stainings and pan-endothelial CD31 immunofluorescence. Conclusion: The new approach is suitable for supplementing or replacing the cumbersome histological procedures in a broad range of skin regeneration and tissue engineering applications.
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15
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Zhu J, Liu C, Liu Y, Chen J, Zhang Y, Yao K, Wang L. Self-Fluence-Compensated Functional Photoacoustic Microscopy. IEEE TRANSACTIONS ON MEDICAL IMAGING 2021; 40:3856-3866. [PMID: 34310295 DOI: 10.1109/tmi.2021.3099820] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Optical-resolution photoacoustic microscopy (OR-PAM) can image blood oxygen saturation (sO2) in vivo with high resolution and excellent sensitivity and offers a great tool for neurovascular study and early cancer diagnosis. OR-PAM ignores the wavelength-dependent optical attenuation in superficial tissue, which cause errors in sO2 imaging. Monte Carlo simulation shows that variations in imaging depth, vessel diameter, and focal position can cause up to ∼ 60 % decrease in sO2 imaging. Here, we develop a self-fluence-compensated OR-PAM to compensate for the wavelength-dependent fluence attenuation. We propose a linearized model to estimate the fluence attenuations and use three optical wavelengths to compensate for them in sO2 calculation. We validate the model in both numerical and physical phantoms and show that the compensation method can effectively reduce the sO2 errors. In functional brain imaging, we demonstrate that the compensation method can effectively improve sO2 accuracy, especially in small vessels. Compared with uncompensated ones, the sO2 values are improved by 10~30% in the brain. We monitor ischemic-stroke-induced brain injury which demonstrates great potential for the pre-clinical study of vascular diseases.
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16
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Wang Z, Wang X, Wan JB, Xu F, Zhao N, Chen M. Optical Imaging in the Second Near Infrared Window for Vascular Bioimaging. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2103780. [PMID: 34643028 DOI: 10.1002/smll.202103780] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 08/17/2021] [Indexed: 06/13/2023]
Abstract
Optical imaging in the second near infrared region (NIR-II, 1000-1700 nm) provides higher resolution and deeper penetration depth for accurate and real-time vascular anatomy, blood dynamics, and function information, effectively contributing to the early diagnosis and curative effect assessment of vascular anomalies. Currently, NIR-II optical imaging demonstrates encouraging results including long-term monitoring of vascular injury and regeneration, real-time feedback of blood perfusion, tracking of lymphatic metastases, and imaging-guided surgery. This review summarizes the latest progresses of NIR-II optical imaging for angiography including fluorescence imaging, photoacoustic (PA) imaging, and optical coherence tomography (OCT). The development of current NIR-II fluorescence, PA, and OCT probes (i.e., single-walled carbon nanotubes, quantum dots, rare earth doped nanoparticles, noble metal-based nanostructures, organic dye-based probes, and semiconductor polymer nanoparticles), highlighting probe optimization regarding high brightness, longwave emission, and biocompatibility through chemical modification or nanotechnology, is first introduced. The application of NIR-II probes in angiography based on the classification of peripheral vascular, cerebrovascular, tumor vessel, and cardiovascular, is then reviewed. Major challenges and opportunities in the NIR-II optical imaging for vascular imaging are finally discussed.
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Affiliation(s)
- Zi'an Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau SAR, 999078, China
| | - Xuan Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau SAR, 999078, China
| | - Jian-Bo Wan
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau SAR, 999078, China
| | - Fujian Xu
- Key Laboratory of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology), Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing, 100000, China
| | - Nana Zhao
- Key Laboratory of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology), Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing, 100000, China
| | - Meiwan Chen
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau SAR, 999078, China
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17
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Ackun-Farmmer MA, Overby CT, Haws BE, Choe R, Benoit DSW. Biomaterials for Orthopaedic Diagnostics and Theranostics. CURRENT OPINION IN BIOMEDICAL ENGINEERING 2021; 19. [PMID: 34458652 DOI: 10.1016/j.cobme.2021.100308] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Despite widespread use of conventional diagnostic methods in orthopaedic applications, limitations still exist in detection and diagnosing many pathologies especially at early stages when intervention is most critical. The use of biomaterials to develop diagnostics and theranostics, including nanoparticles and scaffolds for systemic or local applications, has significant promise to address these shortcomings and enable successful clinical translation. These developments in both modular and holistic design of diagnostic and theranostic biomaterials may improve patient treatments for myriad orthopaedic applications ranging from cancer to fractures to infection.
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Affiliation(s)
- Marian A Ackun-Farmmer
- Department of Biomedical Engineering, University of Rochester, Rochester, NY, USA.,Center for Musculoskeletal Research, University of Rochester, Rochester, NY, USA
| | - Clyde T Overby
- Department of Biomedical Engineering, University of Rochester, Rochester, NY, USA.,Center for Musculoskeletal Research, University of Rochester, Rochester, NY, USA
| | - Brittany E Haws
- Department of Orthopaedics, University of Rochester, Rochester, NY, USA
| | - Regine Choe
- Department of Biomedical Engineering, University of Rochester, Rochester, NY, USA.,Department of Electrical and Computer Engineering, University of Rochester, Rochester, NY, USA
| | - Danielle S W Benoit
- Department of Biomedical Engineering, University of Rochester, Rochester, NY, USA.,Center for Musculoskeletal Research, University of Rochester, Rochester, NY, USA.,Department of Orthopaedics, University of Rochester, Rochester, NY, USA.,Materials Science Program, University of Rochester, Rochester, NY, USA.,Department of Chemical Engineering, University of Rochester, Rochester, NY, USA
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18
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Sharifi N, Gong Z, Holmes G, Chen Y. A Feasibility Study of In Vivo Control and Tracking of Microrobot Using Taxicab Geometry for Direct Drug Targeting. IEEE Trans Nanobioscience 2021; 20:235-245. [PMID: 33625988 DOI: 10.1109/tnb.2021.3062006] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In vivo direct drug targeting aims at delivering drug molecules loaded on microrobots to the diseased site using the shortest possible physiological routes, which potentially improves targeting efficiency and reduces systemic toxicity. It is thus essential to consider realistic in-body limitations for direct drug targeting applications. Here, we present a novel controller for microrobot maneuver by considering four key in vivo constraints: non-Euclidean structure of capillaries, irreversibility of blood flow, invisibility of microvasculature, and inaccuracy of microrobot tracking. We use the taxicab geometry of capillaries as the a priori knowledge for steering and tracking a microrobot in lattice-like vessels. Furthermore, we introduce a minimax repulsive boundary function to prevent the microrobot from getting too close to the boundaries imposed by the direction of blood flow. We also propose a novel Kalman filtering algorithm to reduce tracking error, while avoiding possible obstacles such as vessel walls without knowing their actual locations. The proposed control method consists of four modules, namely a model predictive control module for tumor targeting, a Kalman filtering module for microrobot tracking, a blind obstacle detection module, and a vessel structure estimation module. The interplay of these four modules offers successful maneuver and tracking of the microrobot while avoiding obstacles in a blind manner by utilizing the taxicab geometry of blood vessels. We present a comprehensive in silico simulation study to verify our designed controller.
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19
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Chen SG, Ugwu F, Li WC, Caplice NM, Petcu E, Yip SP, Huang CL. Vascular Tissue Engineering: Advanced Techniques and Gene Editing in Stem Cells for Graft Generation. TISSUE ENGINEERING PART B-REVIEWS 2021; 27:14-28. [DOI: 10.1089/ten.teb.2019.0264] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Sin-Guang Chen
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hong Kong, SAR, China
| | - Felix Ugwu
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hong Kong, SAR, China
| | - Wan-Chun Li
- Institute of Oral Biology, School of Dentistry, National Yang-Ming University, Taipei, Taiwan, China
| | - Noel M. Caplice
- Centre for Research in Vascular Biology, Biosciences Institute, University College Cork, Cork, Ireland
| | - Eugen Petcu
- Griffith University School of Medicine, Menzies Health Institute Queensland, Griffith University, Nathan, Australia
| | - Shea Ping Yip
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hong Kong, SAR, China
| | - Chien-Ling Huang
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hong Kong, SAR, China
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20
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Ravina K, Lin L, Liu CY, Thomas D, Hasson D, Wang LV, Russin JJ. Prospects of Photo- and Thermoacoustic Imaging in Neurosurgery. Neurosurgery 2020; 87:11-24. [PMID: 31620798 DOI: 10.1093/neuros/nyz420] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Accepted: 07/25/2019] [Indexed: 12/25/2022] Open
Abstract
The evolution of neurosurgery has been, and continues to be, closely associated with innovations in technology. Modern neurosurgery is wed to imaging technology and the future promises even more dependence on anatomic and, perhaps more importantly, functional imaging. The photoacoustic phenomenon was described nearly 140 yr ago; however, biomedical applications for this technology have only recently received significant attention. Light-based photoacoustic and microwave-based thermoacoustic technologies represent novel biomedical imaging modalities with broad application potential within and beyond neurosurgery. These technologies offer excellent imaging resolution while generally considered safer, more portable, versatile, and convenient than current imaging technologies. In this review, we summarize the current state of knowledge regarding photoacoustic and thermoacoustic imaging and their potential impact on the field of neurosurgery.
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Affiliation(s)
- Kristine Ravina
- Neurorestoration Center, Keck School of Medicine, University of Southern California, Los Angeles, California
| | - Li Lin
- Caltech Optical Imaging Laboratory, Andrew and Peggy Cherng Department of Medical Engineering, Department of Electrical Engineering, California Institute of Technology, Pasadena, California.,Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, Missouri
| | - Charles Y Liu
- Neurorestoration Center, Keck School of Medicine, University of Southern California, Los Angeles, California.,Department of Neurological Surgery, Keck School of Medicine, University of Southern California, Los Angeles, California.,Department of Biology and Biological Engineering, California Institute of Technology, Pasadena, California.,Tianqiao and Chrissy Chen Brain-machine Interface Center, California Institute of Technology, Pasadena, California
| | - Debi Thomas
- Department of Surgery, University of California Davis, Davis, California
| | - Denise Hasson
- Division of Critical Care Medicine, Cincinnati Children's Hospital, Cincinnati, Ohio
| | - Lihong V Wang
- Caltech Optical Imaging Laboratory, Andrew and Peggy Cherng Department of Medical Engineering, Department of Electrical Engineering, California Institute of Technology, Pasadena, California
| | - Jonathan J Russin
- Neurorestoration Center, Keck School of Medicine, University of Southern California, Los Angeles, California.,Department of Neurological Surgery, Keck School of Medicine, University of Southern California, Los Angeles, California
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21
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Jenni S, Bolze F, Bonnet CS, Pallier A, Sour A, Tóth É, Ventura B, Heitz V. Synthesis and In Vitro Studies of a Gd(DOTA)-Porphyrin Conjugate for Combined MRI and Photodynamic Treatment. Inorg Chem 2020; 59:14389-14398. [PMID: 32960580 DOI: 10.1021/acs.inorgchem.0c02189] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
With the aim of developing new molecular theranostic agents, a π-extended Zn(II) porphyrin as photosensitizer for photodynamic therapy (PDT) linked to two GdDOTA-type complexes for magnetic resonance imaging (MRI) detection was synthesized. The relaxivity studies revealed a much higher relaxivity value per Gd ion for this medium sized molecule (19.32 mM-1 s-1 at 20 MHz and 298 K) compared to clinical contrast agents-a value which strongly increases in the presence of bovine serum albumin, reaching 25.22 mM-1 s-1. Moreover, the photophysical studies showed the strong ability of the molecule to absorb light in the deep red (670 nm, ε ≈ 60000 M-1 cm-1) and in the near-infrared following two-photon excitation (920 nm, σ2 ≈ 650 GM). The conjugate is also able to generate singlet oxygen, with a quantum yield of 0.58 in DMSO. Promising results were obtained in cellular studies, demonstrating that the conjugate is internalized in HeLa cells at micromolar concentration and leads to 70% of cell death following 30 min irradiation at 660 nm. These results confirm the potential of the designed molecule as an imaging and therapeutic agent.
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Affiliation(s)
- Sébastien Jenni
- Laboratoire de Synthèse des Assemblages Moléculaires Multifonctionnels, Institut de Chimie de Strasbourg, CNRS/UMR 7177, Université de Strasbourg, 4 rue Blaise Pascal, 67000 Strasbourg, France
| | - Frédéric Bolze
- CAMB, UMR 7199, Unistra/CNRS, Faculté de Pharmacie, Université de Strasbourg, 74 route du Rhin, 67401 Illkirch, France
| | - Célia S Bonnet
- Centre de Biophysique Moléculaire, CNRS UPR 4301, Université d'Orléans, rue Charles Sadron, CS 80054, 45071 Cedex 2 Orléans, France
| | - Agnès Pallier
- Centre de Biophysique Moléculaire, CNRS UPR 4301, Université d'Orléans, rue Charles Sadron, CS 80054, 45071 Cedex 2 Orléans, France
| | - Angélique Sour
- Laboratoire de Synthèse des Assemblages Moléculaires Multifonctionnels, Institut de Chimie de Strasbourg, CNRS/UMR 7177, Université de Strasbourg, 4 rue Blaise Pascal, 67000 Strasbourg, France
| | - Éva Tóth
- Centre de Biophysique Moléculaire, CNRS UPR 4301, Université d'Orléans, rue Charles Sadron, CS 80054, 45071 Cedex 2 Orléans, France
| | | | - Valérie Heitz
- Laboratoire de Synthèse des Assemblages Moléculaires Multifonctionnels, Institut de Chimie de Strasbourg, CNRS/UMR 7177, Université de Strasbourg, 4 rue Blaise Pascal, 67000 Strasbourg, France
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22
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Carlisle P, Marrs J, Gaviria L, Silliman DT, Decker JF, Brown Baer P, Guda T. Quantifying Vascular Changes Surrounding Bone Regeneration in a Porcine Mandibular Defect Using Computed Tomography. Tissue Eng Part C Methods 2020; 25:721-731. [PMID: 31850839 DOI: 10.1089/ten.tec.2019.0205] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Angiogenesis is a critical process essential for optimal bone healing. Several in vitro and in vivo systems have been previously used to elucidate some of the mechanisms involved in the process of angiogenesis, and at the same time, to test potential therapeutic agents and bioactive factors that play important roles in neovascularization. Computed tomography (CT) is a noninvasive imaging technique that has recently allowed investigators to obtain a diverse range of high-resolution, three-dimensional characterization of structures, such as bone formation within bony defects. Unfortunately, to date, angiogenesis evaluation relies primarily on histology, or ex vivo imaging and few studies have utilized CT to qualitatively and quantitatively study the vascular response during bone repair. In the current study a clinical CT-based technique was used to evaluate the effects of rhBMP-2 eluting graft treatment on soft tissue vascular architecture surrounding a large segmental bone defect model in the minipig mandible. The objective of this study was to demonstrate the efficacy of contrast-enhanced, clinical 64-slice CT technology in extracting quantitative metrics of vascular architecture over a 12-week period. The results of this study show that the presence of rhBMP-2 had a positive effect on vessel volume from 4 to 12 weeks, which was explained by a concurrent increase in vessel number, which was also significantly higher at 4 weeks for the rhBMP-2 treatment. More importantly, analysis of vessel architecture showed no changes throughout the duration of the study, indicating therapeutic safety. This study validates CT analysis as a relevant imaging method for quantitative and qualitative analysis of morphological characteristics of vascular tissue around a bone healing site. Also important, the study shows that CT technology can be used in large animal models and potentially be translated into clinical models for the development of improved methods to evaluate tissue healing and vascular adaptation processes over the course of therapy. This methodology has demonstrated sensitivity to tracking spatial and temporal changes in vascularization and has the potential to be applied to studying changes in other high-contrast tissues as well. Impact Statement Tissue engineering solutions depend on the surrounding tissue response to support regeneration. The inflammatory environment and surrounding vascular supply are critical to determining if therapies will survive, engraftment occurs, and native physiology is restored. This study for the first time evaluates the blood vessel network changes in surrounding soft tissue to a bone defect site in a large animal model, using clinically available computed tomography tools and model changes in vessel number, size, and architecture. While this study focuses on rhBMP2 delivery impacting surrounding vasculature, this validated method can be extended to studying the vascular network changes in other tissues as well.
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Affiliation(s)
- Patricia Carlisle
- Dental Trauma and Research Detachment, United States Army Institute of Surgical Research, Fort Sam Houston, San Antonio, Texas.,Prytime Medical Devices, Inc., Boerne, Texas
| | - Jeffrey Marrs
- Dental Trauma and Research Detachment, United States Army Institute of Surgical Research, Fort Sam Houston, San Antonio, Texas.,School of Dentistry, University of Texas Health Science Center at San Antonio, San Antonio, Texas
| | - Laura Gaviria
- Department of Biomedical Engineering, University of Texas at San Antonio, Texas
| | - David T Silliman
- Dental Trauma and Research Detachment, United States Army Institute of Surgical Research, Fort Sam Houston, San Antonio, Texas
| | - John F Decker
- Dental Trauma and Research Detachment, United States Army Institute of Surgical Research, Fort Sam Houston, San Antonio, Texas
| | - Pamela Brown Baer
- Dental Trauma and Research Detachment, United States Army Institute of Surgical Research, Fort Sam Houston, San Antonio, Texas.,Clinical Operations and New Product Commercialization, GenCure, San Antonio, Texas
| | - Teja Guda
- Department of Biomedical Engineering, University of Texas at San Antonio, Texas
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23
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Shi S, Zhang H, Yin X, Wang Z, Tang B, Luo Y, Ding H, Chen Z, Cao Y, Wang T, Xiao B, Zhang M. 3D digital anatomic angioarchitecture of the mouse brain using synchrotron-radiation-based propagation phase-contrast imaging. JOURNAL OF SYNCHROTRON RADIATION 2019; 26:1742-1750. [PMID: 31490166 DOI: 10.1107/s160057751900674x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Accepted: 05/10/2019] [Indexed: 06/10/2023]
Abstract
Thorough investigation of the three-dimensional (3D) configuration of the vasculature of mouse brain remains technologically difficult because of its complex anatomical structure. In this study, a systematic analysis is developed to visualize the 3D angioarchitecture of mouse brain at ultrahigh resolution using synchrotron-radiation-based propagation phase-contrast imaging. This method provides detailed restoration of the intricate brain microvascular network in a precise 3D manner. In addition to depicting the delicate 3D arrangements of the vascular network, 3D virtual micro-endoscopy is also innovatively performed to visualize randomly a selected vessel within the brain for both external 3D micro-imaging and endoscopic visualization of any targeted microvessels, which improves the understanding of the intrinsic properties of the mouse brain angioarchitecture. Based on these data, hierarchical visualization has been established and a systematic assessment on the 3D configuration of the mouse brain microvascular network has been achieved at high resolution which will aid in advancing the understanding of the role of vasculature in the perspective of structure and function in depth. This holds great promise for wider application in various models of neurovascular diseases.
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Affiliation(s)
- Shupeng Shi
- Department of Neurology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan 410008, People's Republic of China
| | - Haoran Zhang
- Department of Neurology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan 410008, People's Republic of China
| | - Xianzhen Yin
- Center for Drug Delivery System, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, People's Republic of China
| | - Zhuolu Wang
- Department of Breast Surgery, Hunan Provincial Maternal and Child Health Care Hospital, Changsha, Hunan 410008, People's Republic of China
| | - Bin Tang
- Department of Neurology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan 410008, People's Republic of China
| | - Yuebei Luo
- Department of Neurology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan 410008, People's Republic of China
| | - Hui Ding
- Department of Neurology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan 410008, People's Republic of China
| | - Zhuohui Chen
- Department of Neurology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan 410008, People's Republic of China
| | - Yong Cao
- Department of Spine Surgery, Xiangya Hospital, Central South University, Changsha 410008, People's Republic of China
| | - Tiantian Wang
- Department of Neurology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan 410008, People's Republic of China
| | - Bo Xiao
- Department of Neurology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan 410008, People's Republic of China
| | - Mengqi Zhang
- Department of Neurology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan 410008, People's Republic of China
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Liu T, Sun M, Liu Y, Hu D, Ma Y, Ma L, Feng N. ADMM based low-rank and sparse matrix recovery method for sparse photoacoustic microscopy. Biomed Signal Process Control 2019. [DOI: 10.1016/j.bspc.2019.03.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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25
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Xi G, Cao N, Guo W, Kang D, Chen Z, He J, Ren W, Shen T, Wang C, Chen J. Label-Free Imaging of Blood Vessels in Human Normal Breast and Breast Tumor Tissue Using Multiphoton Microscopy. SCANNING 2019; 2019:5192875. [PMID: 31341525 PMCID: PMC6614986 DOI: 10.1155/2019/5192875] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Revised: 05/19/2019] [Accepted: 05/29/2019] [Indexed: 05/29/2023]
Abstract
Blood vessels are the important components of the circulatory systems that transport blood throughout the human body and maintain the homeostasis of physiological tissues. Pathologically, blood vessels are often affected by diseases, leading to the formation of unstable, irregular, and hyperpermeable blood vessels. In the tumor microenvironment, abnormal leakage of tumor blood vessels is related to the histological grade and malignant potential of tumors and may also facilitate metastasis of cancer. Visual diagnosis of blood vessels is very important for us to understand the occurrence and development of diseases. Multiphoton microscopy (MPM) is a potential label-free diagnostic tool based on second harmonic generation (SHG) and two-photon excited fluorescence (TPEF). MPM can effectively observe the morphological changes of biological tissues at the molecular and cellular levels. In this work, we demonstrate that label-free MPM can be used to visualize the microstructure of blood vessels in human normal breast and breast tumor tissue. Moreover, MPM can monitor the changes of blood vessels in tumor microenvironment. These results show that the MPM will become a promising technique for clinicians to study the properties of the microstructure of the blood vessels.
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MESH Headings
- Blood Vessels/diagnostic imaging
- Blood Vessels/pathology
- Breast Neoplasms/blood supply
- Breast Neoplasms/diagnostic imaging
- Breast Neoplasms/pathology
- Breast Neoplasms/surgery
- Eosine Yellowish-(YS)
- Female
- Hematoxylin
- Humans
- Mammary Glands, Human/blood supply
- Mammary Glands, Human/diagnostic imaging
- Mammary Glands, Human/pathology
- Mammary Glands, Human/surgery
- Mastectomy
- Microscopy, Fluorescence, Multiphoton/instrumentation
- Microscopy, Fluorescence, Multiphoton/methods
- Neovascularization, Pathologic/diagnostic imaging
- Neovascularization, Pathologic/pathology
- Neovascularization, Pathologic/surgery
- Paraffin Embedding
- Tissue Fixation
- Tumor Microenvironment
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Affiliation(s)
- Gangqin Xi
- Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Normal University, Fuzhou 350007, China
| | - Ning Cao
- Department of Plastic Surgery, Zhangzhou Affiliated Hospital of Fujian Medical University, Zhangzhou, 363000 Fujian, China
| | - Wenhui Guo
- Department of Breast Surgery, Fujian Medical University Union Hospital, Fuzhou 350001, China
| | - Deyong Kang
- Department of Pathology, Fujian Medical University Union Hospital, Fuzhou 350001, China
| | - Zhong Chen
- Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Normal University, Fuzhou 350007, China
| | - Jiajia He
- Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Normal University, Fuzhou 350007, China
| | - Wenjiao Ren
- Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Normal University, Fuzhou 350007, China
| | - Tingfeng Shen
- Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Normal University, Fuzhou 350007, China
| | - Chuan Wang
- Department of Breast Surgery, Fujian Medical University Union Hospital, Fuzhou 350001, China
| | - Jianxin Chen
- Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Normal University, Fuzhou 350007, China
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26
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Wang CX, Gao ZY, Wang X, Ke C, Zhang Z, Zhang CJ, Fu LM, Wang Y, Zhang JP. Noninvasive and real-time pharmacokinetics imaging of polymeric nanoagents in the thoracoepigastric vein networks of living mice. JOURNAL OF BIOMEDICAL OPTICS 2019; 24:1-11. [PMID: 31222991 PMCID: PMC6977018 DOI: 10.1117/1.jbo.24.6.066009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 06/05/2019] [Indexed: 06/09/2023]
Abstract
Noninvasive and real-time visualization of the thoracoepigastric veins (TVs) of living mice was demonstrated by using two-photon excitation (TPE) optical imaging with a Eu-luminescent polymeric nanoagent as the angiographic contrast. The spatiotemporal evolution of the polymeric nanoagent in TVs was monitored for up to 2 h by TPE time-resolved (TPE-TR) bioimaging, which is free from the interference of tissue autofluorescence. A wide field-of-view covering the thoracoabdominal region allowed the visualization of the entire TV network with an imaging depth of 1 to 2 mm and a lateral resolution of 80 μm at submillimeter. Detailed analysis of the uptake, transport, and clearance processes of the polymeric nanoagent revealed a clearance time constant of ∼30 min and an apparent clearance efficiency of 80% to 90% for the nanoagent in both axial and lateral TVs. TPE-TR imaging of the dissected internal organs proved that the liver is mainly responsible for the sequestration of the nanoagent, which is consistent with the apparent retention efficiency of liver, ∼32 % , as determined by the real-time in vivo TV imaging. We demonstrate the potency of TPE-TR modality in the pharmacokinetics imaging of the peripheral vascular systems of animal models, which can be beneficial for related nanotheranostics study.
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Affiliation(s)
- Chuan-Xi Wang
- Peking University, College of Chemistry and Molecular Engineering, Academy for Advanced Interdisciplinary Studies, Beijing National Laboratory for Molecular Science, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing, China
| | - Zhi-Yue Gao
- Peking University, College of Chemistry and Molecular Engineering, Academy for Advanced Interdisciplinary Studies, Beijing National Laboratory for Molecular Science, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing, China
| | - Xin Wang
- Peking University, College of Chemistry and Molecular Engineering, Academy for Advanced Interdisciplinary Studies, Beijing National Laboratory for Molecular Science, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing, China
| | - Can Ke
- Peking University, College of Chemistry and Molecular Engineering, Academy for Advanced Interdisciplinary Studies, Beijing National Laboratory for Molecular Science, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing, China
| | - Zhuo Zhang
- Renmin University of China, Department of Chemistry, Beijing, China
| | - Chao-Jie Zhang
- Renmin University of China, Department of Chemistry, Beijing, China
| | - Li-Min Fu
- Renmin University of China, Department of Chemistry, Beijing, China
| | - Yuan Wang
- Peking University, College of Chemistry and Molecular Engineering, Academy for Advanced Interdisciplinary Studies, Beijing National Laboratory for Molecular Science, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing, China
| | - Jian-Ping Zhang
- Renmin University of China, Department of Chemistry, Beijing, China
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27
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Liu C, Liang Y, Wang L. Optical-resolution photoacoustic microscopy of oxygen saturation with nonlinear compensation. BIOMEDICAL OPTICS EXPRESS 2019; 10:3061-3069. [PMID: 31259074 PMCID: PMC6583336 DOI: 10.1364/boe.10.003061] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 05/16/2019] [Accepted: 05/19/2019] [Indexed: 05/02/2023]
Abstract
Optical-resolution photoacoustic microscopy (OR-PAM) of oxygen saturation (sO2) offers high-resolution functional information on living tissue. Limited by the availability of high-speed multi-wavelength lasers, most OR-PAM systems use wavelengths around 532nm. Blood has high absorption coefficients in this spectrum, which may cause absorption saturation and induce systematic errors in sO2 imaging. Here, we present nonlinear OR-PAM that compensates for the absorption saturation in sO2 imaging. We model the absorption saturation at different absorption coefficients and ultrasonic bandwidths. To compensate for the absorption saturation, we develop an OR-PAM system with three optical wavelengths and implement a nonlinear algorithm to compute sO2. Phantom experiments on bovine blood validate that the nonlinear OR-PAM can improve the sO2 accuracy by up to 0.13 for fully oxygenated blood. In vivo sO2 imaging has been conducted in the mouse ear. The nonlinear sO2 results agree with the normal physiological values. These results show that the absorption saturation effect can be compensated for in nonlinear OR-PAM, which improves the accuracy of functional photoacoustic imaging.
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Affiliation(s)
- Chao Liu
- Department of Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Ave, Kowloon, Hong Kong SAR, China
- City University of Hong Kong Shenzhen Research Institute, Yuexing Yi Dao, Nanshan District, China
| | - Yizhi Liang
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou 510632, China
| | - Lidai Wang
- Department of Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Ave, Kowloon, Hong Kong SAR, China
- City University of Hong Kong Shenzhen Research Institute, Yuexing Yi Dao, Nanshan District, China
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28
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MR Angiography of the Head/Neck Vascular System in Mice on a Clinical MRI System. CONTRAST MEDIA & MOLECULAR IMAGING 2019; 2019:5461809. [PMID: 31275084 PMCID: PMC6560327 DOI: 10.1155/2019/5461809] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 04/06/2019] [Accepted: 04/28/2019] [Indexed: 01/04/2023]
Abstract
Background Magnetic resonance angiography (MRA) represents a clinical reference standard for the in vivo assessment of the vasculature. In this study, the potential of non-contrast-enhanced and contrast-enhanced angiography of the head/neck vasculature in mice on a clinical MR imaging system was tested. Methods All in vivo magnetic resonance imaging was performed with a 3T clinical system (Siemens). Non-contrast-enhanced (time-of-flight, TOF) and contrast-enhanced angiography (gadofosveset-trisodium, GdT) were performed in C57BL/6J mouse strain. Lumen-to-muscle ratios (LMRs) and area measurements were assessed. Histology was performed as reference standard of all relevant vascular structures. Results A close correlation between TOF (R2 = 0.79; p < 0.05) and contrast-enhanced (GdT) angiography (R2 = 0.92; p < 0.05) with histological area measurements was found. LMRs were comparable between both sequences. Regarding interobserver reproducibility, contrast-enhanced (GdT) angiography yielded a smaller 95% confidence interval and a closer interreader correlation compared to non-contrast-enhanced (TOF) measurements (−0.73–0.89; R2 = 0.81 vs. −0.55–0.56; R2 = 0.94). Conclusion This study demonstrates that non-contrast-enhanced and contrast-enhanced angiographies of the head/neck vasculature of small animals can reliably performed on a clinical 3T MR scanner. Contrast-enhanced angiography enables the visualization of vascular structures with higher intravascular contrast and higher reproducibility.
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29
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Upputuri PK, Pramanik M. Photoacoustic imaging in the second near-infrared window: a review. JOURNAL OF BIOMEDICAL OPTICS 2019; 24:1-20. [PMID: 30968648 PMCID: PMC6990072 DOI: 10.1117/1.jbo.24.4.040901] [Citation(s) in RCA: 96] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Accepted: 03/18/2019] [Indexed: 05/04/2023]
Abstract
Photoacoustic (PA) imaging is an emerging medical imaging modality that combines optical excitation and ultrasound detection. Because ultrasound scatters much less than light in biological tissues, PA generates high-resolution images at centimeters depth. In recent years, wavelengths in the second near-infrared (NIR-II) window (1000 to 1700 nm) have been increasingly explored due to its potential for preclinical and clinical applications. In contrast to the conventional PA imaging in the visible (400 to 700 nm) and the first NIR-I (700 to 1000 nm) window, PA imaging in the NIR-II window offers numerous advantages, including high spatial resolution, deeper penetration depth, reduced optical absorption, and tissue scattering. Moreover, the second window allows a fivefold higher light excitation energy density compared to the visible window for enhancing the imaging depth significantly. We highlight the importance of the second window for PA imaging and discuss the various NIR-II PA imaging systems and contrast agents with strong absorption in the NIR-II spectral region. Numerous applications of NIR-II PA imaging, including whole-body animal imaging and human imaging, are also discussed.
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Affiliation(s)
- Paul Kumar Upputuri
- Nanyang Technological University, School of Chemical and Biomedical Engineering, Singapore
| | - Manojit Pramanik
- Nanyang Technological University, School of Chemical and Biomedical Engineering, Singapore
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30
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Gánti B, Molnár E, Fazekas R, Mikecs B, Lohinai Z, Mikó S, Vág J. Evidence of spreading vasodilation in the human gingiva evoked by nitric oxide. J Periodontal Res 2019; 54:499-505. [PMID: 30865289 DOI: 10.1111/jre.12650] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 12/18/2018] [Accepted: 02/01/2019] [Indexed: 12/12/2022]
Abstract
BACKGROUND AND OBJECTIVE Spreading vasodilation is an important means of increasing local blood flow effectively during increased metabolic demands or in case of vascular injury. Our aim was to develop a technique proving the presence of spreading vasodilation in the human keratinized gingiva. METHODS Local vasodilation was evoked by the application of nitric oxide (NO) donor nitroglycerin into a well, fixed 2 mm above the marginal gingiva, in 20 subjects with healthy periodontal tissue. Either 1 or 8 mg/mL nitroglycerin solutions were dropped into the test well at the upper right second incisor, and saline was applied into the control well at the upper left first incisor. The gingival blood flow (GBF) was recorded for 15 minutes by a laser speckle contrast imager below the well and in the surrounding area in the mesial, distal, apical and coronal directions. Gingival thickness was measured by an ultrasonic biometer. RESULTS Peak GBF increase was similar after 1 mg/mL and after 8 mg/mL nitroglycerin application in the well (51% ± 12% vs 42% ± 8%) and in the apical region (33 ± 9% vs 55% ± 13%). While the lower dose of nitroglycerin increased GBF only in the apical region around the well, the higher dose induced significant elevations in all surrounding regions, with apical prominence. Hyperaemia lasted 10-14 minutes in the low-dose group whereas it extended beyond the observation period in the high-dose group. Neither the baseline nor the NO-induced peak GBF were correlated with gingival thickness. CONCLUSION The role of the direct effect of NO in the regulation of perfusion was demonstrated in the human gingiva as well as the propagation of local vasodilation to distant, especially apical areas, probably by the mechanism of flow-mediated dilation. This mechanism may have a clinical importance for flap survival or wound healing.
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Affiliation(s)
- Bernadett Gánti
- Department of Conservative Dentistry, Semmelweis University, Budapest, Hungary
| | - Eszter Molnár
- Department of Conservative Dentistry, Semmelweis University, Budapest, Hungary
| | - Réka Fazekas
- Department of Conservative Dentistry, Semmelweis University, Budapest, Hungary
| | - Barbara Mikecs
- Department of Conservative Dentistry, Semmelweis University, Budapest, Hungary
| | - Zsolt Lohinai
- Department of Conservative Dentistry, Semmelweis University, Budapest, Hungary
| | - Sándor Mikó
- Department of Conservative Dentistry, Semmelweis University, Budapest, Hungary
| | - János Vág
- Department of Conservative Dentistry, Semmelweis University, Budapest, Hungary
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31
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Ratajczak J, Vangansewinkel T, Gervois P, Merckx G, Hilkens P, Quirynen M, Lambrichts I, Bronckaers A. Angiogenic Properties of 'Leukocyte- and Platelet-Rich Fibrin'. Sci Rep 2018; 8:14632. [PMID: 30279483 PMCID: PMC6168453 DOI: 10.1038/s41598-018-32936-8] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Accepted: 09/13/2018] [Indexed: 01/07/2023] Open
Abstract
Leukocyte- and Platelet-Rich Fibrin (L-PRF) is an autologous platelet concentrate, consisting of a fibrin matrix enriched with platelets, leukocytes and a plethora of cytokines and growth factors. Since L-PRF is produced bedside from whole blood without the use of an anti-coagulant, it is becoming a popular adjuvant in regenerative medicine. While other types of platelet concentrates have been described to stimulate blood vessel formation, little is known about the angiogenic capacities of L-PRF. Therefore, this study aimed to fully characterize the angiogenic potential of L-PRF. With an antibody array, the growth factors released by L-PRF were determined and high levels of CXC chemokine receptor 2 (CXCR-2) ligands and epidermal growth factor (EGF) were found. L-PRF induced in vitro key steps of the angiogenic process: endothelial proliferation, migration and tube formation. In addition, we could clearly demonstrate that L-PRF is able to induce blood vessel formation in vivo, the chorioallantoic membrane assay. In conclusion, we could demonstrate the angiogenic capacity of L-PRF both in vitro and in vivo, underlying the clinical potential of this easy-to-use platelet concentrate.
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Affiliation(s)
- Jessica Ratajczak
- Department of Morphology, Biomedical Research Institute, Faculty of Medicine and Life Sciences, Hasselt University, Diepenbeek, Belgium
| | - Tim Vangansewinkel
- Department of Morphology, Biomedical Research Institute, Faculty of Medicine and Life Sciences, Hasselt University, Diepenbeek, Belgium
| | - Pascal Gervois
- Department of Morphology, Biomedical Research Institute, Faculty of Medicine and Life Sciences, Hasselt University, Diepenbeek, Belgium
| | - Greet Merckx
- Department of Morphology, Biomedical Research Institute, Faculty of Medicine and Life Sciences, Hasselt University, Diepenbeek, Belgium
| | - Petra Hilkens
- Department of Morphology, Biomedical Research Institute, Faculty of Medicine and Life Sciences, Hasselt University, Diepenbeek, Belgium
| | - Marc Quirynen
- Department of Oral Health Sciences, Katholieke Universiteit Leuven (KUL) & Periodontology, University Hospitals Leuven, Leuven, Belgium
| | - Ivo Lambrichts
- Department of Morphology, Biomedical Research Institute, Faculty of Medicine and Life Sciences, Hasselt University, Diepenbeek, Belgium
| | - Annelies Bronckaers
- Department of Morphology, Biomedical Research Institute, Faculty of Medicine and Life Sciences, Hasselt University, Diepenbeek, Belgium.
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32
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Sun RW, Tuchin VV, Zharov VP, Galanzha EI, Richter GT. Current status, pitfalls and future directions in the diagnosis and therapy of lymphatic malformation. JOURNAL OF BIOPHOTONICS 2018; 11:e201700124. [PMID: 28851128 PMCID: PMC11184539 DOI: 10.1002/jbio.201700124] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Revised: 07/31/2017] [Accepted: 08/25/2017] [Indexed: 06/07/2023]
Abstract
Lymphatic malformations are complex congenital vascular lesions composed of dilated, abnormal lymphatic channels of varying size that can result in significant esthetic and physical impairment due to relentless growth. Lymphatic malformations comprised of micro-lymphatic channels (microcystic) integrate and infiltrate normal soft tissue, leading to a locally invasive mass. Ultrasonography and magnetic resonance imaging assist in the diagnosis but are unable to detect microvasculature present in microcystic lymphatic malformations. In this review, we examine existing tools and elaborate on alternative diagnostic methods in assessing lymphatic malformations. In particular, photoacoustics, low-toxicity nanoparticles and optical clearing can overcome existing challenges in the examination of lymphatic channels in vivo. In combination with photothermal scanning and flow cytometry, Photoacoustic techniques may provide a versatile tool for lymphatic-related clinical applications, potentially leading to a single diagnostic and therapeutic platform to overcome limitations in current imaging techniques and permit targeted theranostics of microcystic lymphatic malformations.
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Affiliation(s)
- Ravi W. Sun
- Department of Otolaryngology–Head and Neck Surgery, University of Arkansas for Medical Sciences, Little Rock, Arkansas
- Arkansas Children’s Hospital, Little Rock, Arkansas
| | - Valery V. Tuchin
- Research-Educational Institute of Optics and Biophotonics, Saratov National Research State University, Saratov, Russia
- Institute of Precision Mechanics and Control, Russian Academy of Sciences, Saratov, Russia
- Laboratory of Femtomedicine, ITMO University, St. Petersburg, Russia
| | - Vladimir P. Zharov
- Department of Otolaryngology–Head and Neck Surgery, University of Arkansas for Medical Sciences, Little Rock, Arkansas
- Arkansas Nanomedicine Center, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - Ekaterina I. Galanzha
- Department of Otolaryngology–Head and Neck Surgery, University of Arkansas for Medical Sciences, Little Rock, Arkansas
- Arkansas Nanomedicine Center, University of Arkansas for Medical Sciences, Little Rock, Arkansas
- Laboratory of Lymphatic Research, Diagnosis and Therapy (LLDT), University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - Gresham T. Richter
- Department of Otolaryngology–Head and Neck Surgery, University of Arkansas for Medical Sciences, Little Rock, Arkansas
- Arkansas Children’s Hospital, Little Rock, Arkansas
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33
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Upputuri PK, Pramanik M. Fast photoacoustic imaging systems using pulsed laser diodes: a review. Biomed Eng Lett 2018; 8:167-181. [PMID: 30603201 PMCID: PMC6208528 DOI: 10.1007/s13534-018-0060-9] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2018] [Revised: 02/21/2018] [Accepted: 02/26/2018] [Indexed: 12/15/2022] Open
Abstract
Photoacoustic imaging (PAI) is a newly emerging imaging modality for preclinical and clinical applications. The conventional PAI systems use Q-switched Nd:YAG/OPO (Optical Parametric Oscillator) nanosecond lasers as excitation sources. Such lasers are expensive, bulky, and imaging speed is limited because of low pulse repetition rate. In recent years, the semiconductor laser technology has advanced to generate high-repetitions rate near-infrared pulsed lasers diodes (PLDs) which are reliable, less-expensive, hand-held, and light-weight, about 200 g. In this article, we review the development and demonstration of PLD based PAI systems for preclinical and clinical applications reported in recent years.
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Affiliation(s)
- Paul Kumar Upputuri
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459 Singapore
| | - Manojit Pramanik
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459 Singapore
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34
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Zhu C, Martinez AF, Martin HL, Li M, Crouch BT, Carlson DA, Haystead TAJ, Ramanujam N. Near-simultaneous intravital microscopy of glucose uptake and mitochondrial membrane potential, key endpoints that reflect major metabolic axes in cancer. Sci Rep 2017; 7:13772. [PMID: 29062013 PMCID: PMC5653871 DOI: 10.1038/s41598-017-14226-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 10/06/2017] [Indexed: 12/19/2022] Open
Abstract
While the demand for metabolic imaging has increased in recent years, simultaneous in vivo measurement of multiple metabolic endpoints remains challenging. Here we report on a novel technique that provides in vivo high-resolution simultaneous imaging of glucose uptake and mitochondrial metabolism within a dynamic tissue microenvironment. Two indicators were leveraged; 2-[N-(7-nitrobenz-2-oxa-1, 3-diazol-4-yl) amino]-2-deoxy-D-glucose (2-NBDG) reports on glucose uptake and Tetramethylrhodamine ethyl ester (TMRE) reports on mitochondrial membrane potential. Although we demonstrated that there was neither optical nor chemical crosstalk between 2-NBDG and TMRE, TMRE uptake was significantly inhibited by simultaneous injection with 2-NBDG in vivo. A staggered delivery scheme of the two agents (TMRE injection was followed by 2-NBDG injection after a 10-minute delay) permitted near-simultaneous in vivo microscopy of 2-NBDG and TMRE at the same tissue site by mitigating the interference of 2-NBDG with normal glucose usage. The staggered delivery strategy was evaluated under both normoxic and hypoxic conditions in normal tissues as well as in a murine breast cancer model. The results were consistent with those expected for independent imaging of 2-NBDG and TMRE. This optical imaging technique allows for monitoring of key metabolic endpoints with the unique benefit of repeated, non-destructive imaging within an intact microenvironment.
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Affiliation(s)
- Caigang Zhu
- Department of Biomedical Engineering, Duke University, Durham, NC, 27708, USA
| | - Amy F Martinez
- Department of Biomedical Engineering, Duke University, Durham, NC, 27708, USA
| | - Hannah L Martin
- Department of Biomedical Engineering, Duke University, Durham, NC, 27708, USA
| | - Martin Li
- Department of Biomedical Engineering, Duke University, Durham, NC, 27708, USA
| | - Brian T Crouch
- Department of Biomedical Engineering, Duke University, Durham, NC, 27708, USA
| | - David A Carlson
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC, 27710, USA
| | - Timothy A J Haystead
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC, 27710, USA
| | - Nimmi Ramanujam
- Department of Biomedical Engineering, Duke University, Durham, NC, 27708, USA.
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Hu F, Martin H, Martinez A, Everitt J, Erkanli A, Lee WT, Dewhirst M, Ramanujam N. Distinct Angiogenic Changes during Carcinogenesis Defined by Novel Label-Free Dark-Field Imaging in a Hamster Cheek Pouch Model. Cancer Res 2017; 77:7109-7119. [PMID: 29021136 DOI: 10.1158/0008-5472.can-17-1058] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Revised: 08/03/2017] [Accepted: 10/05/2017] [Indexed: 12/17/2022]
Abstract
There remain gaps in knowledge concerning how vascular morphology evolves during carcinogenesis. In this study, we imaged neovascularization by label-free dark-field microscopy of a 7,12-Dimethylbenz[a]anthracene (DMBA)-induced hamster cheek pouch model of oral squamous cell carcinoma (SCC). Wavelength-dependent imaging revealed distinct vascular features at different imaging depths and vessel sizes. Vascular tortuosity increased significantly in high-risk lesions, whereas diameter decreased significantly in hyperplastic and SCC lesions. Large vessels preserved the same trends seen in the original images, whereas small vessels displayed different trends, with length and diameter increasing during carcinogenesis. On the basis of these data, we developed and validated a classification algorithm incorporating vascular features from different vessel masks. Receiver operator curves generated from the classification results demonstrated high accuracies in discriminating normal and hyperplasia from high-grade lesions (AUC > 0.94). Overall, these results provided automated imaging of vasculature in the earliest stages of carcinogenesis from which one can extract robust endpoints. The optical toolbox described here is simple, low-cost and portable, and can be used in a variety of health care and research settings for cancer prevention and pharmacology research. Cancer Res; 77(24); 7109-19. ©2017 AACR.
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Affiliation(s)
- Fangyao Hu
- Department of Biomedical Engineering, Duke University, Durham, North Carolina
| | - Hannah Martin
- Department of Biomedical Engineering, Duke University, Durham, North Carolina
| | - Amy Martinez
- Department of Biomedical Engineering, Duke University, Durham, North Carolina
| | - Jeffrey Everitt
- Department of Pathology, Duke University Medical Center, Durham, North Carolina
| | - Alaattin Erkanli
- Department of Biostatistics and Bioinformatics, Duke University Medical Center, Durham, North Carolina
| | - Walter T Lee
- Division of Head and Neck Surgery and Communicative Sciences, Duke University Medical Center, Durham, North Carolina
| | - Mark Dewhirst
- Department of Radiation Oncology, Duke University, Durham, North Carolina
| | - Nimmi Ramanujam
- Department of Biomedical Engineering, Duke University, Durham, North Carolina.
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Giuliani A, Mazzoni S, Mele L, Liccardo D, Tromba G, Langer M. Synchrotron Phase Tomography: An Emerging Imaging Method for Microvessel Detection in Engineered Bone of Craniofacial Districts. Front Physiol 2017; 8:769. [PMID: 29085301 PMCID: PMC5649129 DOI: 10.3389/fphys.2017.00769] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 09/20/2017] [Indexed: 01/12/2023] Open
Abstract
The engineering of large 3D constructs, such as certain craniofacial bone districts, is nowadays a critical challenge. Indeed, the amount of oxygen needed for cell survival is able to reach a maximum diffusion distance of ~150–200 μm from the original vascularization vector, often hampering the long-term survival of the regenerated tissues. Thus, the rapid growth of new blood vessels, delivering oxygen and nutrients also to the inner cells of the bone grafts, is mandatory for their long-term function in clinical practice. Unfortunately, significant progress in this direction is currently hindered by a lack of methods with which to visualize these processes in 3D and reliably quantify them. In this regard, a challenging method for simultaneous 3D imaging and analysis of microvascularization and bone microstructure has emerged in recent years: it is based on the use of synchrotron phase tomography. This technique is able to simultaneously identify multiple tissue features in a craniofacial bone site (e.g., the microvascular and the calcified tissue structure). Moreover, it overcomes the intrinsic limitations of both histology, achieving only a 2D characterization, and conventional tomographic approaches, poorly resolving the vascularization net in the case of an incomplete filling of the newly formed microvessels by contrast agents. Indeed, phase tomography, being based on phase differences among the scattered X-ray waves, is capable of discriminating tissues with similar absorption coefficients (like vessels and woven bone) in defined experimental conditions. The approach reviewed here is based on the most recent experiences applied to bone regeneration in the craniofacial region.
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Affiliation(s)
- Alessandra Giuliani
- Sezione di Biochimica, Biologia e Fisica Applicata, Dipartimento di Scienze Cliniche Specialistiche e Odontostomatologiche, Università Politecnica delle Marche, Ancona, Italy
| | - Serena Mazzoni
- Sezione di Biochimica, Biologia e Fisica Applicata, Dipartimento di Scienze Cliniche Specialistiche e Odontostomatologiche, Università Politecnica delle Marche, Ancona, Italy
| | - Luigi Mele
- Sezione di Biotecnologie, Istologia Medica e Biologia Molecolare, Dipartimento di Medicina Sperimentale, Università degli Studi della Campania "L. Vanvitelli", Naples, Italy
| | - Davide Liccardo
- Sezione di Biotecnologie, Istologia Medica e Biologia Molecolare, Dipartimento di Medicina Sperimentale, Università degli Studi della Campania "L. Vanvitelli", Naples, Italy
| | | | - Max Langer
- Centre de Recherche en Acquisition et Traitment d'Images pour la Santé (CREATIS), Centre National de la Recherche Scientifique (CNRS) UMR 5220, Institut national de la santé et de la recherche médicale (Inserm) U1206, Université de Lyon, INSA-Lyon, Villeurbanne, France
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Upputuri PK, Pramanik M. Dynamic in vivo imaging of small animal brain using pulsed laser diode-based photoacoustic tomography system. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:1-4. [PMID: 28952240 DOI: 10.1117/1.jbo.22.9.090501] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Accepted: 09/05/2017] [Indexed: 05/09/2023]
Abstract
We demonstrate dynamic in vivo imaging using a low-cost portable pulsed laser diode (PLD)-based photoacoustic tomography system. The system takes advantage of an 803-nm PLD having high-repetition rate ∼7000 Hz combined with a fast-scanning single-element ultrasound transducer leading to a 5 s cross-sectional imaging. Cortical vasculature is imaged in scan time of 5 s with high signal-to-noise ratio ∼48. To examine the ability for dynamic imaging, we monitored the fast uptake and clearance process of indocyanine green in the rat brain. The system will find applications to study neurofunctional activities, characterization of pharmacokinetic, and biodistribution profiles in the development process of drugs or imaging agents.
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Affiliation(s)
- Paul Kumar Upputuri
- Nanyang Technological University, School of Chemical and Biomedical Engineering, Singapore, Singapore
| | - Manojit Pramanik
- Nanyang Technological University, School of Chemical and Biomedical Engineering, Singapore, Singapore
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Zhang YS, Zhu C, Xia Y. Inverse Opal Scaffolds and Their Biomedical Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:10.1002/adma.201701115. [PMID: 28649794 PMCID: PMC5581229 DOI: 10.1002/adma.201701115] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2017] [Revised: 03/23/2017] [Indexed: 05/04/2023]
Abstract
Three-dimensional porous scaffolds play a pivotal role in tissue engineering and regenerative medicine by functioning as biomimetic substrates to manipulate cellular behaviors. While many techniques have been developed to fabricate porous scaffolds, most of them rely on stochastic processes that typically result in scaffolds with pores uncontrolled in terms of size, structure, and interconnectivity, greatly limiting their use in tissue regeneration. Inverse opal scaffolds, in contrast, possess uniform pores inheriting from the template comprised of a closely packed lattice of monodispersed microspheres. The key parameters of such scaffolds, including architecture, pore structure, porosity, and interconnectivity, can all be made uniform across the same sample and among different samples. In conjunction with a tight control over pore sizes, inverse opal scaffolds have found widespread use in biomedical applications. In this review, we provide a detailed discussion on this new class of advanced materials. After a brief introduction to their history and fabrication, we highlight the unique advantages of inverse opal scaffolds over their non-uniform counterparts. We then showcase their broad applications in tissue engineering and regenerative medicine, followed by a summary and perspective on future directions.
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Affiliation(s)
- Yu Shrike Zhang
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Chunlei Zhu
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA
| | - Younan Xia
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA
- School of Chemistry and Biochemistry, School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
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Young and advanced tumor-some 2D electrodynamic distinctions: melanoma and satellite during a vascular occlusion test: feasibility study. Med Biol Eng Comput 2017; 56:211-220. [PMID: 28691130 DOI: 10.1007/s11517-017-1668-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2017] [Accepted: 06/10/2017] [Indexed: 10/19/2022]
Abstract
Conventional methods of electrobioimpedance imaging are not suited for adequate visualization of the skin electrical impedance landscape (SEL) because they do not provide high spatial resolution at large enough area of view. The skin electrodynamics introscopy (SEI) enabled dynamic spectral imaging of the SEL at 32 × 64 mm2 area with 1 mm spatial resolution. The focus of the study was to investigate the SEL distinguishing features between early and advanced-stage cancer at the model object of melanoma and its satellite. The analysis of the test-induced SEL metamorphoses was carried out at the periods of blood-stop and blood-restoration. It was found that the young tumor could be reliably visualized and distinguished by its antiphase hypoxia-induced response as compared to that of the advanced one. In response to the blood-restoration, an appearance of newly formed SEL clusters pointed out apparently at vascular abnormalities associated with the tumor. Similar SEL clusterization can be supposedly expected in response to any other test factors which affect cell permeability or/and blood viscosity. The proposed approach might be useful for more thorough mapping and staging malignancies.
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Moothanchery M, Sharma A, Pramanik M. Switchable Acoustic and Optical Resolution Photoacoustic Microscopy for In Vivo Small-animal Blood Vasculature Imaging. J Vis Exp 2017. [PMID: 28671655 DOI: 10.3791/55810] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Photoacoustic microscopy (PAM) is a fast-growing invivo imaging modality that combines both optics and ultrasound, providing penetration beyond the optical mean free path (~1 mm in skin) with high resolution. By combining optical absorption contrast with the high spatial resolution of ultrasound in a single modality, this technique can penetrate deep tissues. Photoacoustic microscopy systems can have either a low acoustic resolution and probe deeply or a high optical resolution and probe shallowly. It is challenging to achieve high spatial resolution and large depth penetration with a single system. This work presents an AR-OR-PAM system capable of both high-resolution imaging at shallow depths and low-resolution deep-tissue imaging of the same sample in vivo. A lateral resolution of 4 µm with 1.4 mm imaging depth using optical focusing and a lateral resolution of 45 µm with 7.8 mm imaging depth using acoustic focusing were successfully demonstrated using the combined system. Here, in vivo small-animal blood vasculature imaging is performed to demonstrate its biological imaging capability.
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Affiliation(s)
- Mohesh Moothanchery
- School of Chemical and Biomedical Engineering, Nanyang Technological University
| | - Arunima Sharma
- School of Chemical and Biomedical Engineering, Nanyang Technological University
| | - Manojit Pramanik
- School of Chemical and Biomedical Engineering, Nanyang Technological University;
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Woloszyk A, Mitsiadis TA. Angiogenesis within Stem Cell-Seeded Silk Scaffolds Cultured on the Chorioallantoic Membrane and Visualized by 3D Imaging. ACTA ACUST UNITED AC 2017; 41:1F.19.1-1F.19.9. [PMID: 28510334 DOI: 10.1002/cpsc.27] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The long-term survival and successful integration of implants for tissue replacement and regeneration highly depends upon the fast ingrowth of blood vessels from the surrounding tissues. Before selecting potential biomaterials for clinical applications, they must be thoroughly tested with proper analytical tools. This unit provides a protocol for studying the potential of cell-seeded scaffolds to attract vessels that will form vascular networks within biomaterials. It includes seeding of stem cells into silk fibroin scaffolds, angiogenesis assay on the chorioallantoic membrane (CAM) of fertilized chicken eggs, a procedure for perfusion with MicroFil, and finally microcomputed tomography (µCT) scanning. This technique can help screen potential biomaterial implants, thereby reducing the amount of animals needed for pre-clinical in vivo studies. © 2017 by John Wiley & Sons, Inc.
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Affiliation(s)
- Anna Woloszyk
- Orofacial Development and Regeneration, Institute of Oral Biology, University of Zurich, Zurich, Switzerland
| | - Thimios A Mitsiadis
- Orofacial Development and Regeneration, Institute of Oral Biology, University of Zurich, Zurich, Switzerland
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Upputuri PK, Pramanik M. Recent advances toward preclinical and clinical translation of photoacoustic tomography: a review. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:41006. [PMID: 27893078 DOI: 10.1117/1.jbo.22.4.041006] [Citation(s) in RCA: 111] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Accepted: 10/31/2016] [Indexed: 05/18/2023]
Affiliation(s)
- Paul Kumar Upputuri
- Nanyang Technological University, School of Chemical and Biomedical Engineering, 62 Nanyang Drive, Singapore 637459, Singapore
| | - Manojit Pramanik
- Nanyang Technological University, School of Chemical and Biomedical Engineering, 62 Nanyang Drive, Singapore 637459, Singapore
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Liu WC, Chen S, Zheng L, Qin L. Angiogenesis Assays for the Evaluation of Angiogenic Properties of Orthopaedic Biomaterials - A General Review. Adv Healthc Mater 2017; 6. [PMID: 28135051 DOI: 10.1002/adhm.201600434] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 06/04/2016] [Indexed: 01/07/2023]
Abstract
Vascularization is an essential process in bone formation, remodeling and regeneration during both bone development and fracture repair. Vascularization remains a big challenge directly leading to the final success of newly regenerated bone. In this review, the advantages and disadvantages of different angiogenesis assays and bone defect models are described in details for investigating revascularization of materials of interest. Unlike conventional angiogenesis study with growth factors or pharmaceutical molecules performed in two-dimension, special considerations are taken into account whether these assays can be translated for testing three-dimensional implantable devices. Over the years, accurate and quantifiable in vitro, ex vivo and in vivo assays have been extensively demonstrated to be useful in examining how new blood vessels grow. These methods can contribute to the fundamental understanding of angiogenic properties of the materials, but a bone defect model is still pivotal in order to understand the cascade actions of angiogenesis along with bone formation. Finally, angiogenesis and osteogenesis are both complex processes interacting with each other, the choice of which assay to be performed should adequately address the clinical relevance and reflect the sequence of responses of revascularization of the test materials.
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Affiliation(s)
- Wai Ching Liu
- Musculoskeletal Research Laboratory; Department of Orthopaedics & Traumatology; The Chinese University of Hong Kong; 5/F, Clinical Science Building, Prince of Wales Hospital Shatin Hong Kong SAR PR China
| | - Shihui Chen
- Musculoskeletal Research Laboratory; Department of Orthopaedics & Traumatology; The Chinese University of Hong Kong; 5/F, Clinical Science Building, Prince of Wales Hospital Shatin Hong Kong SAR PR China
- Pathology Center; Shanghai General Hospital/Faculty of Basic Medicine; Shanghai Jiao Tong University School of Medicine; Shanghai PR China
| | - Lizhen Zheng
- Musculoskeletal Research Laboratory; Department of Orthopaedics & Traumatology; The Chinese University of Hong Kong; 5/F, Clinical Science Building, Prince of Wales Hospital Shatin Hong Kong SAR PR China
| | - Ling Qin
- Musculoskeletal Research Laboratory; Department of Orthopaedics & Traumatology; The Chinese University of Hong Kong; 5/F, Clinical Science Building, Prince of Wales Hospital Shatin Hong Kong SAR PR China
- Translational Medicine R&D Center; Institute of Biomedical and Health Engineering; Shenzhen Institutes of Advanced Technology; Chinese Academy of Sciences; Shenzhen PR China
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44
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Platelet Rich Fibrin “PRF” and Regenerative Medicine: ‘The Low-Speed Concept’. STEM CELL BIOLOGY AND REGENERATIVE MEDICINE 2017. [DOI: 10.1007/978-3-319-55645-1_2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Miron RJ, Fujioka-Kobayashi M, Bishara M, Zhang Y, Hernandez M, Choukroun J. Platelet-Rich Fibrin and Soft Tissue Wound Healing: A Systematic Review. TISSUE ENGINEERING PART B-REVIEWS 2016; 23:83-99. [PMID: 27672729 DOI: 10.1089/ten.teb.2016.0233] [Citation(s) in RCA: 225] [Impact Index Per Article: 28.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The growing multidisciplinary field of tissue engineering aims at predictably regenerating, enhancing, or replacing damaged or missing tissues for a variety of conditions caused by trauma, disease, and old age. One area of research that has gained tremendous awareness in recent years is that of platelet-rich fibrin (PRF), which has been utilized across a wide variety of medical fields for the regeneration of soft tissues. This systematic review gathered all the currently available in vitro, in vivo, and clinical literature utilizing PRF for soft tissue regeneration, augmentation, and/or wound healing. In total, 164 publications met the original search criteria, with a total of 48 publications meeting inclusion criteria (kappa score = 94%). These studies were divided into 7 in vitro, 11 in vivo, and 31 clinical studies. In summary, 6 out of 7 (85.7%) and 11 out of 11 (100%) of the in vitro and in vivo studies, respectively, demonstrated a statistically significant advantage for combining PRF to their regenerative therapies. Out of the remaining 31 clinical studies, a total of 8 reported the effects of PRF in a randomized clinical trial, with 5 additional studies (13 total) reporting appropriate controls. In those clinical studies, 9 out of the 13 studies (69.2%) demonstrated a statistically relevant positive outcome for the primary endpoints measured. In total, 18 studies (58% of clinical studies) reported positive wound-healing events associated with the use of PRF, despite using controls. Furthermore, 27 of the 31 clinical studies (87%) supported the use of PRF for soft tissue regeneration and wound healing for a variety of procedures in medicine and dentistry. In conclusion, the results from the present systematic review highlight the positive effects of PRF on wound healing after regenerative therapy for the management of various soft tissue defects found in medicine and dentistry.
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Affiliation(s)
- Richard J Miron
- 1 Department of Periodontology, Nova Southeastern University , Fort Lauderdale, Florida
| | - Masako Fujioka-Kobayashi
- 1 Department of Periodontology, Nova Southeastern University , Fort Lauderdale, Florida.,2 Cranio-Maxillofacial Surgery, Bern University Hospital , Inselspital, Bern, Switzerland .,3 Department of Oral Surgery, Clinical Dentistry, Institute of Biomedical Sciences, Tokushima University Graduate School , Tokushima, Japan
| | - Mark Bishara
- 4 West Bowmanville Family Dental , Ontario, Canada
| | - Yufeng Zhang
- 5 Department of Oral Implantology, University of Wuhan , Wuhan, China
| | - Maria Hernandez
- 1 Department of Periodontology, Nova Southeastern University , Fort Lauderdale, Florida
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Hu F, Morhard R, Murphy HA, Zhu C, Ramanujam N. Dark field optical imaging reveals vascular changes in an inducible hamster cheek pouch model during carcinogenesis. BIOMEDICAL OPTICS EXPRESS 2016; 7:3247-3261. [PMID: 27699096 PMCID: PMC5030008 DOI: 10.1364/boe.7.003247] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 07/22/2016] [Accepted: 07/22/2016] [Indexed: 05/04/2023]
Abstract
In this study, we propose a low-cost cross-polarized dark field microscopy system for in vivo vascular imaging to detect head and neck cancer. A simple-to-use Gabor-filter-based image processing technique was developed to objectively and automatically quantify several important vascular features, including tortuosity, length, diameter and area fraction, from vascular images. Simulations were performed to evaluate the accuracies of vessel segmentation and feature extraction for our algorithm. Sensitivity and specificity for vessel segmentation of the Gabor masks both remained above 80% at all contrast levels when compared to gold-standard masks. Errors for vascular feature extraction were under 5%. Moreover, vascular contrast and vessel diameter were identified to be the two primary factors which affected the segmentation accuracies. After our algorithm was validated, we monitored the blood vessels in an inducible hamster cheek pouch carcinogen model over 17 weeks and quantified vascular features during carcinogenesis. A significant increase in vascular tortuosity and a significant decrease in vessel length were observed during carcinogenesis.
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47
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Human Bone Xenografts: from Preclinical Testing for Regenerative Medicine to Modeling of Diseases. ACTA ACUST UNITED AC 2016. [DOI: 10.1007/s40610-016-0044-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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48
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Quantification of Hepatic Vascular and Parenchymal Regeneration in Mice. PLoS One 2016; 11:e0160581. [PMID: 27494255 PMCID: PMC4975469 DOI: 10.1371/journal.pone.0160581] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 07/21/2016] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND Liver regeneration consists of cellular proliferation leading to parenchymal and vascular growth. This study complements previous studies on cellular proliferation and weight recovery by (1) quantitatively describing parenchymal and vascular regeneration, and (2) determining their relationship. Both together are needed to (3) characterize the underlying growth pattern. METHODS Specimens were created by injecting a polymerizing contrast agent in either portal or hepatic vein in normal or regenerating livers after 70% partial hepatectomy. 3D image data were obtained through micro-CT scanning. Parenchymal growth was assessed by determining weight and volume of the regenerating liver. Vascular growth was described by manually determined circumscribed parameters (maximal vessel length and radius of right inferior portal/hepatic vein), automatically determined cumulative parameters (total edge length and total vascular volume), and parameters describing vascular density (total edge length/volume, vascular volume fraction). The growth pattern was explored by comparing the relative increase of these parameters to the increase expected in case of isotropic expansion. RESULTS Liver volume recovery paralleled weight recovery and reached 90% of the original liver volume within 7 days. Comparing radius-related vascular parameters immediately after surgical resection and after virtual resection in-silico revealed a slight increase, possibly reflecting the effect of resection-induced portal hyperperfusion. Comparing length-related parameters between post-operative day 7 and after virtual resection showed similar vascular growth in both vascular systems investigated. In contrast, radius-related parameters increased slightly more in the portal vein. Despite the seemingly homogeneous 3D growth, the observed vascular parameters were not compatible with the hypothesis of isotropic expansion of liver parenchyma and vascular structures. CONCLUSION We present an approach for the quantitative analysis of the vascular systems of regenerating mouse livers. We applied this technique for assessing the hepatic growth pattern. Prospectively, this approach can be used to investigate hepatic vascular regeneration under different conditions.
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Avigo C, Flori A, Armanetti P, Di Lascio N, Kusmic C, Jose J, Losi P, Soldani G, Faita F, Menichetti L. Strategies for non-invasive imaging of polymeric biomaterial in vascular tissue engineering and regenerative medicine using ultrasound and photoacoustic techniques. POLYM INT 2016. [DOI: 10.1002/pi.5113] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Cinzia Avigo
- Institute of Clinical Physiology; National Research Council; via G. Moruzzi 1 56124 Pisa Italy
| | - Alessandra Flori
- Institute of Clinical Physiology; National Research Council; via G. Moruzzi 1 56124 Pisa Italy
| | - Paolo Armanetti
- Institute of Clinical Physiology; National Research Council; via G. Moruzzi 1 56124 Pisa Italy
| | - Nicole Di Lascio
- Institute of Clinical Physiology; National Research Council; via G. Moruzzi 1 56124 Pisa Italy
| | - Claudia Kusmic
- Institute of Clinical Physiology; National Research Council; via G. Moruzzi 1 56124 Pisa Italy
| | - Jithin Jose
- Institute of Clinical Physiology; National Research Council; via G. Moruzzi 1 56124 Pisa Italy
| | - Paola Losi
- Institute of Clinical Physiology; National Research Council; via G. Moruzzi 1 56124 Pisa Italy
| | - Giorgio Soldani
- Institute of Clinical Physiology; National Research Council; via G. Moruzzi 1 56124 Pisa Italy
| | - Francesco Faita
- Institute of Clinical Physiology; National Research Council; via G. Moruzzi 1 56124 Pisa Italy
| | - Luca Menichetti
- Institute of Clinical Physiology; National Research Council; via G. Moruzzi 1 56124 Pisa Italy
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50
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Martínez CE, Smith PC, Palma Alvarado VA. The influence of platelet-derived products on angiogenesis and tissue repair: a concise update. Front Physiol 2015; 6:290. [PMID: 26539125 PMCID: PMC4611136 DOI: 10.3389/fphys.2015.00290] [Citation(s) in RCA: 131] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Accepted: 10/02/2015] [Indexed: 01/22/2023] Open
Abstract
Platelet degranulation allows the release of a large amount of soluble mediators, is an essential step for wound healing initiation, and stimulates clotting, and angiogenesis. The latter process is one of the most critical biological events observed during tissue repair, increasing the growth of blood vessels in the maturing wound. Angiogenesis requires the action of a variety of growth factors that act in an appropriate physiological ratio to assure functional blood vessel restoration. Platelets release main regulators of angiogenesis: Vascular Endothelial Growth Factors (VEGFs), basic fibroblast growth factor (FGF-2), and Platelet derived growth factors (PDGFs), among others. In order to stimulate tissue repair, platelet derived fractions have been used as an autologous source of growth factors and biomolecules, namely Platelet Rich Plasma (PRP), Platelet Poor Plasma (PPP), and Platelet Rich Fibrin (PRF). The continuous release of these growth factors has been proposed to promote angiogenesis both in vitro and in vivo. Considering the existence of clinical trials currently evaluating the efficacy of autologous PRP, the present review analyses fundamental questions regarding the putative role of platelet derived fractions as regulators of angiogenesis and evaluates the possible clinical implications of these formulations.
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Affiliation(s)
- Constanza E Martínez
- Dentistry Academic Unit, Laboratory of Periodontal Biology and Regeneration, Faculty of Medicine, Pontificia Universidad Católica de Chile Santiago, Chile
| | - Patricio C Smith
- Dentistry Academic Unit, Laboratory of Periodontal Biology and Regeneration, Faculty of Medicine, Pontificia Universidad Católica de Chile Santiago, Chile
| | - Verónica A Palma Alvarado
- Laboratory of Stem Cells and Development, Faculty of Science, FONDAP Center for Genome Regulation, University of Chile Santiago, Chile
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