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Collin SP, Yopak KE, Crowe-Riddell JM, Camilieri-Asch V, Kerr CC, Robins H, Ha MH, Ceddia A, Dutka TL, Chapuis L. Bioimaging of sense organs and the central nervous system in extant fishes and reptiles in situ: A review. Anat Rec (Hoboken) 2024. [PMID: 39223842 DOI: 10.1002/ar.25566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Revised: 08/03/2024] [Accepted: 08/07/2024] [Indexed: 09/04/2024]
Abstract
Bioimaging is changing the field of sensory biology, especially for taxa that are lesser-known, rare, and logistically difficult to source. When integrated with traditional neurobiological approaches, developing an archival, digital repository of morphological images can offer the opportunity to improve our understanding of whole neural systems without the issues of surgical intervention and negate the risk of damage and artefactual interpretation. This review focuses on current approaches to bioimaging the peripheral (sense organs) and central (brain) nervous systems in extant fishes (cartilaginous and bony) and non-avian reptiles in situ. Magnetic resonance imaging (MRI), micro-computed tomography (μCT), both super-resolution track density imaging and diffusion tensor-based imaging, and a range of other new technological advances are presented, together with novel approaches in optimizing both contrast and resolution, for developing detailed neuroanatomical atlases and enhancing comparative analyses of museum specimens. For MRI, tissue preparation, including choice of fixative, impacts tissue MR responses, where both resolving power and signal-to-noise ratio improve as field strength increases. Time in fixative, concentration of contrast agent, and duration of immersion in the contrast agent can also significantly affect relaxation times, and thus image quality. For μCT, the use of contrast-enhancing stains (iodine-, non-iodine-, or nanoparticle-based) is critical, where the type of fixative used, and the concentration of stain and duration of staining time often require species-specific optimization. Advanced reconstruction algorithms to reduce noise and artifacts and post-processing techniques, such as deconvolution and filtering, are now being used to improve image quality and resolution.
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Affiliation(s)
- Shaun P Collin
- School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, Victoria, Australia
| | - Kara E Yopak
- Department of Biology and Marine Biology, University of North Carolina Wilmington, Wilmington, North Carolina, USA
| | - Jenna M Crowe-Riddell
- School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, Victoria, Australia
- School of Biological Sciences, The University of Adelaide, Adelaide, South Australia, Australia
| | - Victoria Camilieri-Asch
- Max Planck Queensland Centre for the Materials Science of Extracellular Matrices, Queensland University of Technology, Kelvin Grove, Queensland, Australia
| | - Caroline C Kerr
- School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, Victoria, Australia
| | - Hope Robins
- School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, Victoria, Australia
| | - Myoung Hoon Ha
- School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, Victoria, Australia
| | - Annalise Ceddia
- School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, Victoria, Australia
| | - Travis L Dutka
- School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, Victoria, Australia
| | - Lucille Chapuis
- School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, Victoria, Australia
- School of Biological Sciences, University of Bristol, Bristol, UK
- Leigh Marine Laboratory, Institute of Marine Science, University of Auckland, Leigh, New Zealand
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2
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Emonde CK, Eggers ME, Wichmann M, Hurschler C, Ettinger M, Denkena B. Radiopacity Enhancements in Polymeric Implant Biomaterials: A Comprehensive Literature Review. ACS Biomater Sci Eng 2024; 10:1323-1334. [PMID: 38330191 PMCID: PMC10934286 DOI: 10.1021/acsbiomaterials.3c01667] [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: 11/14/2023] [Revised: 01/17/2024] [Accepted: 01/18/2024] [Indexed: 02/10/2024]
Abstract
Polymers as biomaterials possess favorable properties, which include corrosion resistance, light weight, biocompatibility, ease of processing, low cost, and an ability to be easily tailored to meet specific applications. However, their inherent low X-ray attenuation, resulting from the low atomic numbers of their constituent elements, i.e., hydrogen (1), carbon (6), nitrogen (7), and oxygen (8), makes them difficult to visualize radiographically. Imparting radiopacity to radiolucent polymeric implants is necessary to enable noninvasive evaluation of implantable medical devices using conventional imaging methods. Numerous studies have undertaken this by blending various polymers with contrast agents consisting of heavy elements. The selection of an appropriate contrast agent is important, primarily to ensure that it does not cause detrimental effects to the relevant mechanical and physical properties of the polymer depending upon the intended application. Furthermore, its biocompatibility with adjacent tissues and its excretion from the body require thorough evaluation. We aimed to summarize the current knowledge on contrast agents incorporated into synthetic polymers in the context of implantable medical devices. While a single review was found that discussed radiopacity in polymeric biomaterials, the publication is outdated and does not address contemporary polymers employed in implant applications. Our review provides an up-to-date overview of contrast agents incorporated into synthetic medical polymers, encompassing both temporary and permanent implants. We expect that our results will significantly inform and guide the strategic selection of contrast agents, considering the specific requirements of implantable polymeric medical devices.
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Affiliation(s)
- Crystal Kayaro Emonde
- Laboratory
for Biomechanics and Biomaterials (LBB), Hannover Medical School, Anna-von-Borries-Strasse 1-7, 30625 Hannover, Germany
| | - Max-Enno Eggers
- Institute
of Production Engineering and Machine Tools, Leibniz University Hannover, An der Universität 2, 30823 Garbsen, Hannover, Germany
| | - Marcel Wichmann
- Institute
of Production Engineering and Machine Tools, Leibniz University Hannover, An der Universität 2, 30823 Garbsen, Hannover, Germany
| | - Christof Hurschler
- Laboratory
for Biomechanics and Biomaterials (LBB), Hannover Medical School, Anna-von-Borries-Strasse 1-7, 30625 Hannover, Germany
| | - Max Ettinger
- Department
of Orthopedic Surgery − DIAKOVERE Annastift, Hannover Medical School, Anna-von-Borries-Strasse 1-7, 30625 Hannover, Germany
| | - Berend Denkena
- Institute
of Production Engineering and Machine Tools, Leibniz University Hannover, An der Universität 2, 30823 Garbsen, Hannover, Germany
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3
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Fu N, Li A, Zhang J, Zhang P, Zhang H, Yang S, Zhang J. Liposome-camouflaged iodinated mesoporous silica nanoparticles with high loading capacity, high hemodynamic stability, high biocompatibility and high radiopacity. Int J Pharm 2024; 650:123700. [PMID: 38086493 DOI: 10.1016/j.ijpharm.2023.123700] [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: 09/29/2023] [Revised: 11/19/2023] [Accepted: 12/08/2023] [Indexed: 12/18/2023]
Abstract
Due to their low osmolality and high tolerability, the highly water-soluble nonionic iodinated contrast agents, such as Ioversol (IV), are widely used as clinical agents for CT imaging. However, their clinical applications still are severely limited by the rapid renal excretion, serious adverse effects especially contrast-induced nephropathy and inefficient targetability. Various nanocarriers have demonstrated tremendous potential for achieving high imaging efficiency and low side effects. However, few nanoparticulate contrast agents can simultaneously integrate the desirable functions for imaging, including high loading capacity of iodine, high structure stability for systemic circulation, high biocompatibility and high radiopacity. Herein, we designed and prepared a kind of new radiopaque liposome-camouflaged iodinated mesoporous silica nanoparticles (OIV-MSNs@Liposomes) as contrast agents in CT imaging. Their composition, structure, morphology, biocompatibility and physicochemical properties as well as in vitro radiopacity were investigated in detail. The results indicated that OIV-MSNs@Liposomes can integrate their individual advantages of liposomes and MSNs, thus exhibiting great potential for use in the CT imaging. Considering the simple preparation process and readily available starting materials as well as enhanced biosafety and high performance in X-ray attenuation, the strategy reported here offers a versatile route to efficiently deliver highly water-soluble nonionic iodinated contrast agents for enhanced CT imaging, which are unattainable by traditional means.
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Affiliation(s)
- Naikuan Fu
- Department of Cardiology, Chest Hospital, Tianjin University, Tianjin 300222, China; Tianjin Key Laboratory of Cardiovascular Emergency and Critical Care, Tianjin Municipal Science and Technology Bureau, Tianjin Chest Hospital, Tianjin University, Tianjin 300222, China
| | - Ao Li
- Department of Polymer Science and Engineering, Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
| | - Jing Zhang
- Department of Cardiology, Chest Hospital, Tianjin University, Tianjin 300222, China; Tianjin Key Laboratory of Cardiovascular Emergency and Critical Care, Tianjin Municipal Science and Technology Bureau, Tianjin Chest Hospital, Tianjin University, Tianjin 300222, China
| | - Peng Zhang
- Department of Cardiology, Chest Hospital, Tianjin University, Tianjin 300222, China; Tianjin Key Laboratory of Cardiovascular Emergency and Critical Care, Tianjin Municipal Science and Technology Bureau, Tianjin Chest Hospital, Tianjin University, Tianjin 300222, China
| | - Hong Zhang
- Department of Cardiology, Chest Hospital, Tianjin University, Tianjin 300222, China; Tianjin Key Laboratory of Cardiovascular Emergency and Critical Care, Tianjin Municipal Science and Technology Bureau, Tianjin Chest Hospital, Tianjin University, Tianjin 300222, China
| | - Shicheng Yang
- Department of Cardiology, Chest Hospital, Tianjin University, Tianjin 300222, China; Tianjin Key Laboratory of Cardiovascular Emergency and Critical Care, Tianjin Municipal Science and Technology Bureau, Tianjin Chest Hospital, Tianjin University, Tianjin 300222, China
| | - Jianhua Zhang
- Department of Polymer Science and Engineering, Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China; Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin University, Tianjin 300350, China.
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4
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Nakata MT, Takahara M, Yamada T, Demura T. Simultaneous analysis of shape and internal structure of a curved Hibiscus cannabinus pulvinus: X-ray microtomography and semi-automated quantification. JOURNAL OF PLANT RESEARCH 2024; 137:79-94. [PMID: 37812342 DOI: 10.1007/s10265-023-01498-w] [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: 01/13/2023] [Accepted: 09/11/2023] [Indexed: 10/10/2023]
Abstract
In the Malvaceae family, dynamic solar tracking by leaves is actuated by the deformation of the pulvinus, a thickened region at the leaf blade-petiole junction. While the internal structure is believed to play a crucial role in this process, experimental verification has been challenging due to technical limitations. To address this gap, we developed a semi-automated workflow, which integrates data analysis and image processing to simultaneously analyze the shape and internal structure of a Malvaceae pulvinus using X-ray microtomography. Firstly, we found that kenaf (Hibiscus cannabinus L.), a Malvaceae species with curved pulvini, exhibited solar-tracking leaf movement and selected it as a model system. We employed diffusible iodine-based contrast-enhanced computed tomography to visualize the internal structure of the kenaf pulvinus. Analysis of the pulvini's shape revealed variations in pulvinus morphology, yet plausible prediction of the centerline was accomplished using polar polynomial regression. Upon slicing the pulvini perpendicular to the centerline, we observed distinct gray value gradients along the proximo-distal and adaxial-abaxial axes, challenging threshold-based tissue segmentation. This workflow successfully generated three modified 3D images and derived quantitative parameters. Using these quantitative parameters, we conducted network analysis and found the linkage between the size-normalized cortex cross-sectional area and curvature. Polynomial least absolute shrinkage and selection operator (LASSO) regression revealed the relationship between the size-normalized cortex cross-sectional area and curvature commonly in all three tested samples. This workflow enables simultaneous analysis of the shape and internal structure, significantly improving the reproducibility of Malvaceae leaf pulvinus characterization.
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Affiliation(s)
- Miyuki T Nakata
- Graduate School of Science and Technology, Nara Institute of Science and Technology (NAIST), Ikoma, Nara, Japan.
- Center for Digital Green-Innovation, Nara Institute of Science and Technology (NAIST), Ikoma, Nara, Japan.
- Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chūō-ku, Kumamoto, 860-8555, Japan.
| | | | - Toshihiro Yamada
- The Botanical Gardens, Osaka Metropolitan University, Katano, Osaka, Japan
- Department of Earth and Planetary Sciences, Faculty of Science, Hokkaido University, Kita-ku, Sapporo, Japan
| | - Taku Demura
- Graduate School of Science and Technology, Nara Institute of Science and Technology (NAIST), Ikoma, Nara, Japan
- Center for Digital Green-Innovation, Nara Institute of Science and Technology (NAIST), Ikoma, Nara, Japan
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5
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Meng X, Gao J, Sun Y, Duan F, Chen B, Lv G, Li H, Jiang X, Wu Y, Zhang J, Fang X, Yao Z, Zuo C, Bu W. Fusing Positive and Negative CT Contrast Nanoagent for the Sensitive Detection of Hepatoma. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2304668. [PMID: 37870166 PMCID: PMC10700169 DOI: 10.1002/advs.202304668] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 10/04/2023] [Indexed: 10/24/2023]
Abstract
Positive computed tomography (CT) contrast nanoagent has significant applications in diagnosing tumors. However, the sensitive differentiation between hepatoma and normal liver tissue remains challenging. This challenge arises primarily because both normal liver and hepatoma tissues capture the nanoagent, resulting in similar positive CT contrasts. Here, a strategy for fusing positive and negative CT contrast nanoagent is proposed to detect hepatoma. A nanoagent Hf-MOF@AB@PVP initially generates a positive CT contrast signal of 120.3 HU in the liver. Subsequently, it can specifically respond to the acidic microenvironment of hepatoma to generate H2 , further achieving a negative contrast of -96.0 HU. More importantly, the relative position between the negative and positive signals area is helpful to determine the location of hepatoma and normal liver tissues. The distinct contrast difference of 216.3 HU and relative orientation between normal liver and tumor tissues are meaningful to sensitively distinguish hepatoma from normal liver tissue utilizing CT imaging.
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Affiliation(s)
- Xianfu Meng
- Department of Nuclear MedicineChanghai HospitalNavy Medical UniversityShanghai200433China
- Department of Materials Science and State Key Laboratory of Molecular Engineering of PolymersAcademy for Engineering and TechnologyFudan UniversityShanghai200433China
| | - Jiahao Gao
- Department of RadiologyHuashan HospitalFudan UniversityShanghai200040China
| | - Yanhong Sun
- Department of Materials Science and State Key Laboratory of Molecular Engineering of PolymersAcademy for Engineering and TechnologyFudan UniversityShanghai200433China
- Department of GastroenterologyChanghai HospitalNaval Medical UniversityShanghai200433China
| | - Fei Duan
- Department of RadiologyEye & ENT Hospital of Fudan UniversityFudan UniversityShanghai200031China
| | - Bixue Chen
- Department of RadiologyWuxi People's HospitalNanjing Medical UniversityWuxi214023China
| | - Guanglei Lv
- Center for Biotechnology and Biomedical EngineeringYiwu Research Institute of Fudan UniversityYiwu322000China
| | - Huiyan Li
- Department of Materials Science and State Key Laboratory of Molecular Engineering of PolymersAcademy for Engineering and TechnologyFudan UniversityShanghai200433China
| | - Xingwu Jiang
- Department of Materials Science and State Key Laboratory of Molecular Engineering of PolymersAcademy for Engineering and TechnologyFudan UniversityShanghai200433China
| | - Yelin Wu
- Tongji University Cancer CenterShanghai Tenth People's HospitalTongji University School of MedicineShanghai200072China
| | - Jiawen Zhang
- Department of RadiologyHuashan HospitalFudan UniversityShanghai200040China
| | - Xiangming Fang
- Department of RadiologyWuxi People's HospitalNanjing Medical UniversityWuxi214023China
| | - Zhenwei Yao
- Department of RadiologyHuashan HospitalFudan UniversityShanghai200040China
| | - Changjing Zuo
- Department of Nuclear MedicineChanghai HospitalNavy Medical UniversityShanghai200433China
| | - Wenbo Bu
- Department of Materials Science and State Key Laboratory of Molecular Engineering of PolymersAcademy for Engineering and TechnologyFudan UniversityShanghai200433China
- Department of RadiologyHuashan HospitalFudan UniversityShanghai200040China
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6
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Keiler J, Stahnke T, Guthoff RF, Wree A, Runge J. Ex Vivo Micro-CT in Ophthalmology: Preparation and Contrasting for Non-invasive 3D-Visualisation. Klin Monbl Augenheilkd 2023; 240:1359-1368. [PMID: 38092003 DOI: 10.1055/a-2111-8415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
X-ray-based micro-computed tomography (micro-CT) is a largely non-destructive imaging method for the visualisation and analysis of internal structures in the ex vivo eye and affords high resolution. In contrast to other high-resolution imaging methods, micro-CT enables spatial recording of larger and more complex tissue structures, such as the anterior chamber of the eye. Special contrasting methods help to enhance the absorption properties of soft tissue, that is otherwise only weakly radiopaque. Critical point drying (CPD), as primarily used in scanning electron microscopy, offers an additional tool for improving differential contrast properties in soft tissue. In the visualisation of intraosseous soft tissue, such as the efferent lacrimal ducts, sample treatment by decalcification with ethylenediaminetetraacetic acid and subsequent CPD provides good results for micro-CT. Micro-CT can be used for a wide range of questions in 1. basic research, 2. application-related studies in ophthalmology (e.g. evaluation of the preclinical application of microstents for glaucoma treatment or analysis of the positioning of intraocular lenses) but also 3. as a supplement to ophthalmological histopathology.
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Affiliation(s)
- Jonas Keiler
- Institut für Anatomie, Universitätsmedizin Rostock, Deutschland
| | - Thomas Stahnke
- Klinik und Poliklinik für Augenheilkunde, Universitätsmedizin Rostock, Deutschland
- Institut für ImplantatTechnologie und Biomaterialien e. V., Warnemünde, Deutschland
| | - Rudolf F Guthoff
- Klinik und Poliklinik für Augenheilkunde, Universitätsmedizin Rostock, Deutschland
| | - Andreas Wree
- Institut für Anatomie, Universitätsmedizin Rostock, Deutschland
| | - Jens Runge
- Institut für Anatomie, Universitätsmedizin Rostock, Deutschland
- Klinik und Poliklinik für Augenheilkunde, Universitätsmedizin Rostock, Deutschland
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7
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Pronin AS, Pozmogova TN, Vorotnikov YA, Vavilov GD, Ivanov AA, Yanshole VV, Tsygankova AR, Gusel’nikova TY, Mironov YV, Shestopalov MA. PEGylation of Terminal Ligands as a Route to Decrease the Toxicity of Radiocontrast Re 6-Clusters. Int J Mol Sci 2023; 24:16569. [PMID: 38068892 PMCID: PMC10706756 DOI: 10.3390/ijms242316569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 11/17/2023] [Accepted: 11/19/2023] [Indexed: 12/18/2023] Open
Abstract
The development of novel radiocontrast agents, mainly used for the visualization of blood vessels, is still an emerging task due to the variety of side effects of conventional X-ray contrast media. Recently, we have shown that octahedral chalcogenide rhenium clusters with phosphine ligands-Na2H14[{Re6Q8}(P(C2H4COO)3)6] (Q = S, Se)-can be considered as promising X-ray contrast agents if their relatively high toxicity related to the high charge of the complexes can be overcome. To address this issue, we propose one of the most widely used methods for tuning the properties of proteins and peptides-PEGylation (PEG is polyethylene glycol). The reaction between the clusters and PEG-400 was carried out in acidic aqueous media and resulted in the binding of up to five carboxylate groups with PEG. The study of cytotoxicity against Hep-2 cells and acute toxicity in mice showed a twofold reduction in toxicity after PEGylation, demonstrating the success of the strategy chosen. Finally, the compound obtained has been used for the visualization of blood vessels of laboratory rats by angiography and computed tomography.
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Affiliation(s)
- Aleksei S. Pronin
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., Novosibirsk 630090, Russia; (A.S.P.); (T.N.P.); (A.A.I.); (A.R.T.); (T.Y.G.); (M.A.S.)
| | - Tatiana N. Pozmogova
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., Novosibirsk 630090, Russia; (A.S.P.); (T.N.P.); (A.A.I.); (A.R.T.); (T.Y.G.); (M.A.S.)
| | - Yuri A. Vorotnikov
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., Novosibirsk 630090, Russia; (A.S.P.); (T.N.P.); (A.A.I.); (A.R.T.); (T.Y.G.); (M.A.S.)
| | - Georgy D. Vavilov
- National Medical Research Center for Circulation Pathology n.a. Academician E.N. Meshalkin, 15 Rechkunovskaya St., Novosibirsk 630055, Russia;
| | - Anton A. Ivanov
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., Novosibirsk 630090, Russia; (A.S.P.); (T.N.P.); (A.A.I.); (A.R.T.); (T.Y.G.); (M.A.S.)
| | - Vadim V. Yanshole
- International Tomography Center SB RAS, 3a Institutskaya St., Novosibirsk 630090, Russia;
- Department of Physics, Novosibirsk State University, 2 Pirogova Str., Novosibirsk 630090, Russia
| | - Alphiya R. Tsygankova
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., Novosibirsk 630090, Russia; (A.S.P.); (T.N.P.); (A.A.I.); (A.R.T.); (T.Y.G.); (M.A.S.)
- Department of Natural Sciences, Novosibirsk State University, 2 Pirogova Str., Novosibirsk 630090, Russia
| | - Tatiana Ya. Gusel’nikova
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., Novosibirsk 630090, Russia; (A.S.P.); (T.N.P.); (A.A.I.); (A.R.T.); (T.Y.G.); (M.A.S.)
- Department of Physics, Novosibirsk State University, 2 Pirogova Str., Novosibirsk 630090, Russia
| | - Yuri V. Mironov
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., Novosibirsk 630090, Russia; (A.S.P.); (T.N.P.); (A.A.I.); (A.R.T.); (T.Y.G.); (M.A.S.)
| | - Michael A. Shestopalov
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., Novosibirsk 630090, Russia; (A.S.P.); (T.N.P.); (A.A.I.); (A.R.T.); (T.Y.G.); (M.A.S.)
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8
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Rizzo R, Capozza M, Carrera C, Terreno E. Bi-HPDO3A as a novel contrast agent for X-ray computed tomography. Sci Rep 2023; 13:16747. [PMID: 37798332 PMCID: PMC10556142 DOI: 10.1038/s41598-023-43031-y] [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: 07/10/2023] [Accepted: 09/18/2023] [Indexed: 10/07/2023] Open
Abstract
A new bismuth-based CT agent was synthesized through a facile synthesis strategy. The in vitro stability, toxicity and CT performance were evaluated. The in vivo imaging performance was investigated using three different doses (0.5, 1.2 and 5 mmol/kg) and the result obtained at 1.2 mmol/kg was compared with the clinically approved CT agent iopamidol at the same dosage.
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Affiliation(s)
- Rebecca Rizzo
- Department of Molecular Biotechnology and Health Sciences, Molecular Imaging Centre, University of Torino, Via Nizza 52, 10126, Turin, Italy
| | - Martina Capozza
- Department of Molecular Biotechnology and Health Sciences, Molecular Imaging Centre, University of Torino, Via Nizza 52, 10126, Turin, Italy
| | - Carla Carrera
- Institute of Biostructures and Bioimaging, National Research Council, Via Nizza 52, 10126, Turin, Italy
| | - Enzo Terreno
- Department of Molecular Biotechnology and Health Sciences, Molecular Imaging Centre, University of Torino, Via Nizza 52, 10126, Turin, Italy.
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9
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Lortie J, Rush B, Gage G, Dhingra R, Hetzel S, Pickhardt PJ, Szczykutowicz TP, Kuchnia AJ. Correcting Posterior Paraspinal Muscle Computed Tomography Density for Intravenous Contrast Material Independent of Sex and Vascular Phase. J Thorac Imaging 2023; 38:00005382-990000000-00095. [PMID: 37732694 PMCID: PMC10950837 DOI: 10.1097/rti.0000000000000743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/22/2023]
Abstract
PURPOSE Intravenous contrast poses challenges to computed tomography (CT) muscle density analysis. We developed and tested corrections for contrast-enhanced CT muscle density to improve muscle analysis and the utility of CT scans for the assessment of myosteatosis. MATERIALS AND METHODS Using retrospective images from 240 adults who received routine abdominal CT imaging from March to November 2020 with weight-based iodine contrast, we obtained paraspinal muscle density measurements from noncontrast (NC), arterial, and venous-phase images. We used a calibration sample to develop 9 different mean and regression-based corrections for the effect of contrast. We applied the corrections in a validation sample and conducted equivalence testing. RESULTS We evaluated 140 patients (mean age 52.0 y [SD: 18.3]; 60% female) in the calibration sample and 100 patients (mean age 54.8 y [SD: 18.9]; 60% female) in the validation sample. Contrast-enhanced muscle density was higher than NC by 8.6 HU (SD: 6.2) for the arterial phase (female, 10.4 HU [SD: 5.7]; male, 6.0 HU [SD:6.0]) and by 6.4 HU [SD:8.1] for the venous phase (female, 8.0 HU [SD: 8.6]; male, 4.0 HU [SD: 6.6]). Corrected contrast-enhanced and NC muscle density was equivalent within 3 HU for all correctionns. The -7.5 HU correction, independent of sex and phase, performed well for arterial (95% CI: -0.18, 1.80 HU) and venous-phase data (95% CI: -0.88, 1.41 HU). CONCLUSIONS Our validated correction factor of -7.5 HU renders contrast-enhanced muscle density statistically similar to NC density and is a feasible rule-of-thumb for clinicians to implement.
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Affiliation(s)
- Jevin Lortie
- Department of Nutritional Sciences, University of Wisconsin-Madison, Madison, WI
| | - Benjamin Rush
- Department of Nutritional Sciences, University of Wisconsin-Madison, Madison, WI
| | - Grace Gage
- Department of Nutritional Sciences, University of Wisconsin-Madison, Madison, WI
| | - Ravi Dhingra
- Department of Medicine, Cardiovascular Division, University of Wisconsin-Madison, Madison, WI
| | - Scott Hetzel
- Institute for Clinical and Translational Research, University of Wisconsin-Madison, Madison, WI
| | | | - Timothy P. Szczykutowicz
- Department of Radiology, University of Wisconsin-Madison, Madison, WI
- Department of Medical Physics, University of Wisconsin-Madison, Madison, WI
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI
| | - Adam J. Kuchnia
- Department of Nutritional Sciences, University of Wisconsin-Madison, Madison, WI
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10
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Stojanović M, Lalatović J, Milosavljević A, Savić N, Simms C, Radosavljević B, Ćetković M, Kravić Stevović T, Mrda D, Čolović MB, Parac-Vogt TN, Krstić D. In vivo toxicity evaluation of a polyoxotungstate nanocluster as a promising contrast agent for computed tomography. Sci Rep 2023; 13:9140. [PMID: 37277558 DOI: 10.1038/s41598-023-36317-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 06/01/2023] [Indexed: 06/07/2023] Open
Abstract
In this study, we demonstrate for the first time, that a discrete metal-oxo cluster α-/β-K6P2W18O62 (WD-POM) exhibits superior performance as a computed tomography (CT) contrast agent, in comparison to the standard contrast agent iohexol. A toxicity evaluation of WD-POM was performed according to standard toxicological protocols using Wistar albino rats. The maximum tolerable dose (MTD) of 2000 mg/kg was initially determined after oral WD-POM application. The acute intravenous toxicity of single WD-POM doses (1/3, 1/5, and 1/10 MTD), which are at least fifty times higher than the typically used dose (0.015 mmol W kg-1) of tungsten-based contrast agents, was evaluated for 14 days. The results of arterial blood gas analysis, CO-oximetry status, electrolyte and lactate levels for 1/10 MTD group (80% survival rate) indicated the mixed respiratory and metabolic acidosis. The highest deposition of WD-POM (0.6 ppm tungsten) was found in the kidney, followed by liver (0.15 ppm tungsten), for which the histological analysis revealed morphological irregularities, although the renal function parameters (creatinine and BUN levels) were within the physiological range. This study is the first and important step in evaluating side effects of polyoxometalate nanoclusters, which in recent years have shown a large potential as therapeutics and contrast agents.
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Affiliation(s)
- Marko Stojanović
- Department of Pharmacology, Clinical Pharmacology and Toxicology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Jovana Lalatović
- Department of Radiology, University Hospital Medical Center Bežanijska Kosa, Belgrade, Serbia
| | - Aleksandra Milosavljević
- Institute of Histology and Embryology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Nada Savić
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Charlotte Simms
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Branimir Radosavljević
- Institute of Medical Chemistry, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Mila Ćetković
- Institute of Histology and Embryology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Tamara Kravić Stevović
- Institute of Histology and Embryology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Davor Mrda
- Department of Radiology, University Hospital Medical Center Bežanijska Kosa, Belgrade, Serbia
| | - Mirjana B Čolović
- "Vinča" Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia.
| | - Tatjana N Parac-Vogt
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium.
| | - Danijela Krstić
- Institute of Medical Chemistry, Faculty of Medicine, University of Belgrade, Belgrade, Serbia.
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11
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Brunet J, Walsh CL, Wagner WL, Bellier A, Werlein C, Marussi S, Jonigk DD, Verleden SE, Ackermann M, Lee PD, Tafforeau P. Preparation of large biological samples for high-resolution, hierarchical, synchrotron phase-contrast tomography with multimodal imaging compatibility. Nat Protoc 2023; 18:1441-1461. [PMID: 36859614 DOI: 10.1038/s41596-023-00804-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 12/12/2022] [Indexed: 03/03/2023]
Abstract
Imaging across different scales is essential for understanding healthy organ morphology and pathophysiological changes. The macro- and microscale three-dimensional morphology of large samples, including intact human organs, is possible with X-ray microtomography (using laboratory or synchrotron sources). Preparation of large samples for high-resolution imaging, however, is challenging due to limitations such as sample shrinkage, insufficient contrast, movement of the sample and bubble formation during mounting or scanning. Here, we describe the preparation, stabilization, dehydration and mounting of large soft-tissue samples for X-ray microtomography. We detail the protocol applied to whole human organs and hierarchical phase-contrast tomography at the European Synchrotron Radiation Facility, yet it is applicable to a range of biological samples, including complete organisms. The protocol enhances the contrast when using X-ray imaging, while preventing sample motion during the scan, even with different sample orientations. Bubbles trapped during mounting and those formed during scanning (in the case of synchrotron X-ray imaging) are mitigated by multiple degassing steps. The sample preparation is also compatible with magnetic resonance imaging, computed tomography and histological observation. The sample preparation and mounting require 24-36 d for a large organ such as a whole human brain or heart. The preparation time varies depending on the composition, size and fragility of the tissue. Use of the protocol enables scanning of intact organs with a diameter of 150 mm with a local voxel size of 1 μm. The protocol requires users with expertise in handling human or animal organs, laboratory operation and X-ray imaging.
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Affiliation(s)
- J Brunet
- Department of Mechanical Engineering, University College London, London, UK.
- European Synchrotron Radiation Facility, Grenoble, France.
| | - C L Walsh
- Department of Mechanical Engineering, University College London, London, UK.
| | - W L Wagner
- Department of Diagnostic and Interventional Radiology, University Hospital Heidelberg, Heidelberg, Germany
- Translational Lung Research Centre Heidelberg (TLRC), German Lung Research Centre (DZL), Heidelberg, Germany
| | - A Bellier
- Laboratoire d'Anatomie des Alpes Françaises (LADAF), Université Grenoble Alpes, Grenoble, France
| | - C Werlein
- Institute of Pathology, Hannover Medical School, Hannover, Germany
| | - S Marussi
- Department of Mechanical Engineering, University College London, London, UK
| | - D D Jonigk
- Institute of Pathology, Hannover Medical School, Hannover, Germany
- Biomedical Research in End-stage and Obstructive Lung Disease Hannover (BREATH), German Lung Research Centre (DZL), Hannover, Germany
| | - S E Verleden
- Antwerp Surgical Training, Anatomy and Research Centre (ASTARC), University of Antwerp, Antwerp, Belgium
| | - M Ackermann
- Institute of Pathology and Molecular Pathology, Helios University Clinic Wuppertal, University of Witten/Herdecke, Wuppertal, Germany
- Institute of Functional and Clinical Anatomy, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Peter D Lee
- Department of Mechanical Engineering, University College London, London, UK.
- Research Complex at Harwell, Didcot, UK.
| | - Paul Tafforeau
- European Synchrotron Radiation Facility, Grenoble, France.
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12
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Su L, Dalby KS, Luehmann H, Elkassih SA, Cho S, He X, Detering L, Lin YN, Kang N, Moore DA, Laforest R, Sun G, Liu Y, Wooley KL. Ultrasmall, elementary and highly translational nanoparticle X-ray contrast media from amphiphilic iodinated statistical copolymers. Acta Pharm Sin B 2023; 13:1660-1670. [PMID: 37139426 PMCID: PMC10149980 DOI: 10.1016/j.apsb.2022.09.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 08/18/2022] [Accepted: 09/05/2022] [Indexed: 11/01/2022] Open
Abstract
To expand the single-dose duration over which noninvasive clinical and preclinical cancer imaging can be conducted with high sensitivity, and well-defined spatial and temporal resolutions, a facile strategy to prepare ultrasmall nanoparticulate X-ray contrast media (nano-XRCM) as dual-modality imaging agents for positron emission tomography (PET) and computed tomography (CT) has been established. Synthesized from controlled copolymerization of triiodobenzoyl ethyl acrylate and oligo(ethylene oxide) acrylate monomers, the amphiphilic statistical iodocopolymers (ICPs) could directly dissolve in water to afford thermodynamically stable solutions with high aqueous iodine concentrations (>140 mg iodine/mL water) and comparable viscosities to conventional small molecule XRCM. The formation of ultrasmall iodinated nanoparticles with hydrodynamic diameters of ca. 10 nm in water was confirmed by dynamic and static light scattering techniques. In a breast cancer mouse model, in vivo biodistribution studies revealed that the 64Cu-chelator-functionalized iodinated nano-XRCM exhibited extended blood residency and higher tumor accumulation compared to typical small molecule imaging agents. PET/CT imaging of tumor over 3 days showed good correlation between PET and CT signals, while CT imaging allowed continuous observation of tumor retention even after 10 days post-injection, enabling longitudinal monitoring of tumor retention for imaging or potentially therapeutic effect after a single administration of nano-XRCM.
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Affiliation(s)
- Lu Su
- Department of Chemistry, Department of Materials Science and Engineering, and Department of Chemical Engineering, Texas A&M University, College Station, TX 77842, USA
- Laboratory of Macromolecular and Organic Chemistry and Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, MB 5600, The Netherlands
| | - Kellie S. Dalby
- Department of Chemistry, Department of Materials Science and Engineering, and Department of Chemical Engineering, Texas A&M University, College Station, TX 77842, USA
| | - Hannah Luehmann
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, Saint Louis, MO 63110, USA
| | - Sussana A. Elkassih
- Department of Chemistry, Department of Materials Science and Engineering, and Department of Chemical Engineering, Texas A&M University, College Station, TX 77842, USA
| | - Sangho Cho
- Department of Chemistry, Department of Materials Science and Engineering, and Department of Chemical Engineering, Texas A&M University, College Station, TX 77842, USA
| | - Xun He
- Department of Chemistry, Department of Materials Science and Engineering, and Department of Chemical Engineering, Texas A&M University, College Station, TX 77842, USA
| | - Lisa Detering
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, Saint Louis, MO 63110, USA
| | - Yen-Nan Lin
- Department of Chemistry, Department of Materials Science and Engineering, and Department of Chemical Engineering, Texas A&M University, College Station, TX 77842, USA
| | - Nari Kang
- Department of Chemistry, Department of Materials Science and Engineering, and Department of Chemical Engineering, Texas A&M University, College Station, TX 77842, USA
| | | | - Richard Laforest
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, Saint Louis, MO 63110, USA
| | - Guorong Sun
- Department of Chemistry, Department of Materials Science and Engineering, and Department of Chemical Engineering, Texas A&M University, College Station, TX 77842, USA
| | - Yongjian Liu
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, Saint Louis, MO 63110, USA
| | - Karen L. Wooley
- Department of Chemistry, Department of Materials Science and Engineering, and Department of Chemical Engineering, Texas A&M University, College Station, TX 77842, USA
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Pugliese Pereira B, Antoine C, de Barros AODS, Pacífico LDC, Pijeira MSO, Rossi AM, Ricci-Junior E, Alencar LMR, Santos-Oliveira R. Evaluating Hydroxyapatite, Gold Nanoparticles, and Graphene-Copper as Bimodal Agents for X-ray and Computed Tomography. Bioengineering (Basel) 2023; 10:bioengineering10020238. [PMID: 36829732 PMCID: PMC9952155 DOI: 10.3390/bioengineering10020238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 02/06/2023] [Accepted: 02/08/2023] [Indexed: 02/16/2023] Open
Abstract
A global need exists for new and more effective contrast agents for computed tomography and traditional X-ray modalities. Among the few options available nowadays, limitations imposed by industrial production, performance, and efficacy restrict the use and reduce the potential of both imaging techniques. The use of nanomaterials as new contrast agents for X-ray and computed tomography is an innovative and viable way to increase the options and enhance performance. In this study, we evaluated eight nanomaterials: hydroxyapatite doped with zinc (Zn-HA 10%); hydroxyapatite doped with strontium (Sr-HA 10%); hydroxyapatite without thermal treatment (HA 282 STT); thermally treated hydroxyapatite (HA 212 500 °C and HA 01.256 CTT 1000 °C); hydroxyapatite microspheres (HA microspheres); gold nanoparticles (AuNP); and graphene oxide doped with copper (Cu-GO). The results showed that for both imaging modalities; HA microspheres were the best option, followed by hydroxyapatite thermally treated at 1000 °C. The nanomaterials with the worst results were hydroxyapatite doped with zinc (Zn-HA 10%), and hydroxyapatite doped with strontium (Sr-HA 10%). Our data demonstrated the potential of using nanomaterials, especially HA microspheres, and hydroxyapatite with thermal treatment (HA 01.256 CTT 1000 °C) as contrast agents for X-ray and computed tomography.
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Affiliation(s)
- Bruno Pugliese Pereira
- Laboratory of Nanoradiopharmacy and Synthesis of Novel Radiopharmaceuticals, Nuclear Engineering Institute Brazilian Nuclear Energy Commission, Rio de Janeiro 21941906, RJ, Brazil
| | - Claudia Antoine
- Laboratory of Nanoradiopharmacy and Synthesis of Novel Radiopharmaceuticals, Nuclear Engineering Institute Brazilian Nuclear Energy Commission, Rio de Janeiro 21941906, RJ, Brazil
| | - Aline Oliveira da Silva de Barros
- Laboratory of Nanoradiopharmacy and Synthesis of Novel Radiopharmaceuticals, Nuclear Engineering Institute Brazilian Nuclear Energy Commission, Rio de Janeiro 21941906, RJ, Brazil
| | - Leonardo de Castro Pacífico
- Department of Radiological Sciences, Institute of Biology Roberto Alcântara Gomes State University of Rio de Janeiro, Rio de Janeiro 20550013, RJ, Brazil
| | - Martha Sahylí Ortega Pijeira
- Laboratory of Nanoradiopharmacy and Synthesis of Novel Radiopharmaceuticals, Nuclear Engineering Institute Brazilian Nuclear Energy Commission, Rio de Janeiro 21941906, RJ, Brazil
| | - Alexandre Malta Rossi
- Department of Condensed Matter, Applied Physics and Nanoscience, Brazilian Center for Research in Physics, Rio de Janeiro 22290180, RJ, Brazil
| | - Eduardo Ricci-Junior
- School of Pharmacy, Federal University of Rio de Janeiro, Rio de Janeiro 21941900, RJ, Brazil
| | | | - Ralph Santos-Oliveira
- Laboratory of Nanoradiopharmacy and Synthesis of Novel Radiopharmaceuticals, Nuclear Engineering Institute Brazilian Nuclear Energy Commission, Rio de Janeiro 21941906, RJ, Brazil
- Laboratory of Radiopharmacy and Nanoradiopharmaceuticals, Rio de Janeiro State University, Rio de Janeiro 23070200, RJ, Brazil
- Correspondence:
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14
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Wu Q, Zheng Q, He Y, Chen Q, Yang H. Emerging Nanoagents for Medical X-ray Imaging. Anal Chem 2023; 95:33-48. [PMID: 36625104 DOI: 10.1021/acs.analchem.2c04602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Qinxia Wu
- MOE Key Laboratory for Analytical Science of Food Safety and Biology, College of Chemistry, Fuzhou University, Fuzhou 350002, China
| | - Qianyu Zheng
- MOE Key Laboratory for Analytical Science of Food Safety and Biology, College of Chemistry, Fuzhou University, Fuzhou 350002, China
| | - Yu He
- MOE Key Laboratory for Analytical Science of Food Safety and Biology, College of Chemistry, Fuzhou University, Fuzhou 350002, China
| | - Qiushui Chen
- MOE Key Laboratory for Analytical Science of Food Safety and Biology, College of Chemistry, Fuzhou University, Fuzhou 350002, China.,Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350108, P. R. China
| | - Huanghao Yang
- MOE Key Laboratory for Analytical Science of Food Safety and Biology, College of Chemistry, Fuzhou University, Fuzhou 350002, China.,Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350108, P. R. China
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15
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Balcaen T, Piens C, Mwema A, Chourrout M, Vandebroek L, Des Rieux A, Chauveau F, De Borggraeve WM, Hoffmann D, Kerckhofs G. Revealing the three-dimensional murine brain microstructure by contrast-enhanced computed tomography. Front Neurosci 2023; 17:1141615. [PMID: 37034159 PMCID: PMC10076597 DOI: 10.3389/fnins.2023.1141615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 03/08/2023] [Indexed: 04/11/2023] Open
Abstract
To improve our understanding of the brain microstructure, high-resolution 3D imaging is used to complement classical 2D histological assessment techniques. X-ray computed tomography allows high-resolution 3D imaging, but requires methods for enhancing contrast of soft tissues. Applying contrast-enhancing staining agents (CESAs) ameliorates the X-ray attenuating properties of soft tissue constituents and is referred to as contrast-enhanced computed tomography (CECT). Despite the large number of chemical compounds that have successfully been applied as CESAs for imaging brain, they are often toxic for the researcher, destructive for the tissue and without proper characterization of affinity mechanisms. We evaluated two sets of chemically related CESAs (organic, iodinated: Hexabrix and CA4+ and inorganic polyoxometalates: 1:2 hafnium-substituted Wells-Dawson phosphotungstate and Preyssler anion), for CECT imaging of healthy murine hemispheres. We then selected the CESA (Hexabrix) that provided the highest contrast between gray and white matter and applied it to a cuprizone-induced demyelination model. Differences in the penetration rate, effect on tissue integrity and affinity for tissue constituents have been observed for the evaluated CESAs. Cuprizone-induced demyelination could be visualized and quantified after Hexabrix staining. Four new non-toxic and non-destructive CESAs to the field of brain CECT imaging were introduced. The added value of CECT was shown by successfully applying it to a cuprizone-induced demyelination model. This research will prove to be crucial for further development of CESAs for ex vivo brain CECT and 3D histopathology.
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Affiliation(s)
- Tim Balcaen
- MolDesignS, Sustainable Chemistry for Metals and Molecules, Department of Chemistry, KU Leuven, Leuven, Belgium
- ContrasT Team, Institute of Mechanics, Materials and Civil Engineering, Mechatronic, Electrical Energy and Dynamic Systems, UCLouvain, Louvain-la-Neuve, Belgium
- Pole of Morphology, Institute of Experimental and Clinical Research, UCLouvain, Brussels, Belgium
| | - Catherine Piens
- ContrasT Team, Institute of Mechanics, Materials and Civil Engineering, Mechatronic, Electrical Energy and Dynamic Systems, UCLouvain, Louvain-la-Neuve, Belgium
| | - Ariane Mwema
- Advanced Drug Delivery and Biomaterials, UCLouvain, Brussels, Belgium
- Bioanalysis and Pharmacology of Bioactive Lipids, UCLouvain, Brussels, Belgium
| | - Matthieu Chourrout
- Université Claude Bernard Lyon 1, Centre National de la Recherche Scientifique, Institut National de la Santé et de la Recherche Médicale, Centre de Recherche en Neurosciences de Lyon U1028 UMR 5292, Bron, France
| | - Laurens Vandebroek
- Laboratory of Biomolecular Modelling and Design (LBMD), Biochemistry, Molecular and Structural Biology, Department of Chemistry, KU Leuven, Leuven, Belgium
| | - Anne Des Rieux
- Advanced Drug Delivery and Biomaterials, UCLouvain, Brussels, Belgium
| | - Fabien Chauveau
- Université Claude Bernard Lyon 1, Centre National de la Recherche Scientifique, Institut National de la Santé et de la Recherche Médicale, Centre de Recherche en Neurosciences de Lyon U1028 UMR 5292, Bron, France
| | - Wim M. De Borggraeve
- MolDesignS, Sustainable Chemistry for Metals and Molecules, Department of Chemistry, KU Leuven, Leuven, Belgium
| | - Delia Hoffmann
- Pole of Morphology, Institute of Experimental and Clinical Research, UCLouvain, Brussels, Belgium
- Prometheus, Division of Skeletal Tissue Engineering, KU Leuven, Leuven, Belgium
- Skeletal Biology and Engineering Research Center, KU Leuven, Leuven, Belgium
| | - Greet Kerckhofs
- ContrasT Team, Institute of Mechanics, Materials and Civil Engineering, Mechatronic, Electrical Energy and Dynamic Systems, UCLouvain, Louvain-la-Neuve, Belgium
- Pole of Morphology, Institute of Experimental and Clinical Research, UCLouvain, Brussels, Belgium
- Department Materials Engineering, KU Leuven, Leuven, Belgium
- *Correspondence: Greet Kerckhofs,
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16
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Munir M, Setiawan H, Awaludin R, Kett VL. Aerosolised micro and nanoparticle: formulation and delivery method for lung imaging. Clin Transl Imaging 2023; 11:33-50. [PMID: 36196096 PMCID: PMC9521863 DOI: 10.1007/s40336-022-00527-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Accepted: 09/26/2022] [Indexed: 02/07/2023]
Abstract
Purpose The application of contrast and tracing agents is essential for lung imaging, as indicated by the wide use in recent decades and the discovery of various new contrast and tracing agents. Different aerosol production and pulmonary administration methods have been developed to improve lung imaging quality. This review details and discusses the ideal characteristics of aerosol administered via pulmonary delivery for lung imaging and the methods for the production and pulmonary administration of dry or liquid aerosol. Methods We explored several databases, including PubMed, Scopus, and Google Scholar, while preparing this review to discover and obtain the abstracts, reports, review articles, and research papers related to aerosol delivery for lung imaging and the formulation and pulmonary delivery method of dry and liquid aerosol. The search terms used were "dry aerosol delivery", "liquid aerosol delivery", "MRI for lung imaging", "CT scan for lung imaging", "SPECT for lung imaging", "PET for lung imaging", "magnetic particle imaging", "dry powder inhalation", "nebuliser", and "pressurised metered-dose inhaler". Results Through the literature review, we found that the critical considerations in aerosol delivery for lung imaging are appropriate lung deposition of inhaled aerosol and avoiding toxicity. The important tracing agent was also found to be Technetium-99m (99mTc), Gallium-68 (68Ga) and superparamagnetic iron oxide nanoparticle (SPION), while the essential contrast agents are gold, iodine, silver gadolinium, iron and manganese-based particles. The pulmonary delivery of such tracing and contrast agents can be performed using dry formulation (graphite ablation, spark ignition and spray dried powder) and liquid aerosol (nebulisation, pressurised metered-dose inhalation and air spray). Conclusion A dual-imaging modality with the combination of different tracing or contrast agents is a future development of aerosolised micro and nanoparticles for lung imaging to improve diagnosis success. Graphical abstract
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Affiliation(s)
- Miftakul Munir
- Research Center for Radioisotope Radiopharmaceutical and Biodosimetry Technology, National Research and Innovation Agency, South Tangerang, 15345 Indonesia
| | - Herlan Setiawan
- Research Center for Radioisotope Radiopharmaceutical and Biodosimetry Technology, National Research and Innovation Agency, South Tangerang, 15345 Indonesia
| | - Rohadi Awaludin
- Research Center for Radioisotope Radiopharmaceutical and Biodosimetry Technology, National Research and Innovation Agency, South Tangerang, 15345 Indonesia
| | - Vicky L. Kett
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast, BT9 7BL UK
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17
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Warr R, Handschuh S, Glösmann M, Cernik RJ, Withers PJ. Quantifying multiple stain distributions in bioimaging by hyperspectral X-ray tomography. Sci Rep 2022; 12:21945. [PMID: 36535963 PMCID: PMC9763266 DOI: 10.1038/s41598-022-23592-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 11/02/2022] [Indexed: 12/23/2022] Open
Abstract
Chemical staining of biological specimens is commonly utilised to boost contrast in soft tissue structures, but unambiguous identification of staining location and distribution is difficult without confirmation of the elemental signature, especially for chemicals of similar density contrast. Hyperspectral X-ray computed tomography (XCT) enables the non-destructive identification, segmentation and mapping of elemental composition within a sample. With the availability of hundreds of narrow, high resolution (~ 1 keV) energy channels, the technique allows the simultaneous detection of multiple contrast agents across different tissue structures. Here we describe a hyperspectral imaging routine for distinguishing multiple chemical agents, regardless of contrast similarity. Using a set of elemental calibration phantoms, we perform a first instance of direct stain concentration measurement using spectral absorption edge markers. Applied to a set of double- and triple-stained biological specimens, the study analyses the extent of stain overlap and uptake regions for commonly used contrast markers. An improved understanding of stain concentration as a function of position, and the interaction between multiple stains, would help inform future studies on multi-staining procedures, as well as enable future exploration of heavy metal uptake across medical, agricultural and ecological fields.
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Affiliation(s)
- Ryan Warr
- grid.5379.80000000121662407Henry Royce Institute, Department of Materials, The University of Manchester, Manchester, M13 9PL UK
| | - Stephan Handschuh
- grid.6583.80000 0000 9686 6466VetCore Facility for Research, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Martin Glösmann
- grid.6583.80000 0000 9686 6466VetCore Facility for Research, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Robert J. Cernik
- grid.5379.80000000121662407Henry Royce Institute, Department of Materials, The University of Manchester, Manchester, M13 9PL UK
| | - Philip J. Withers
- grid.5379.80000000121662407Henry Royce Institute, Department of Materials, The University of Manchester, Manchester, M13 9PL UK
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18
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Lortie J, Gage G, Rush B, Heymsfield SB, Szczykutowicz TP, Kuchnia AJ. The effect of computed tomography parameters on sarcopenia and myosteatosis assessment: a scoping review. J Cachexia Sarcopenia Muscle 2022; 13:2807-2819. [PMID: 36065509 PMCID: PMC9745495 DOI: 10.1002/jcsm.13068] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 06/21/2022] [Accepted: 07/20/2022] [Indexed: 12/15/2022] Open
Abstract
Computed tomography (CT) is a valuable assessment method for muscle pathologies such as sarcopenia, cachexia, and myosteatosis. However, several key underappreciated scan imaging parameters need consideration for both research and clinical use, specifically CT kilovoltage and the use of contrast material. We conducted a scoping review to assess these effects on CT muscle measures. We reviewed articles from PubMed, Scopus, and Web of Science from 1970 to 2020 on the effect of intravenous contrast material and variation in CT kilovoltage on muscle mass and density. We identified 971 articles on contrast and 277 articles on kilovoltage. The number of articles that met inclusion criteria for contrast and kilovoltage was 11 and 7, respectively. Ten studies evaluated the effect of contrast on muscle density of which nine found that contrast significantly increases CT muscle density (arterial phase 6-23% increase, venous phase 19-57% increase, and delayed phase 23-43% increase). Seven out of 10 studies evaluating the effect of contrast on muscle area found significant increases in area due to contrast (≤2.58%). Six studies evaluating kilovoltage on muscle density found that lower kilovoltage resulted in a higher muscle density (14-40% increase). One study reported a significant decrease in muscle area when reducing kilovoltage (2.9%). The use of contrast and kilovoltage variations can have dramatic effects on skeletal muscle analysis and should be considered and reported in CT muscle analysis research. These significant factors in CT skeletal muscle analysis can alter clinical and research outcomes and are therefore a barrier to clinical application unless better appreciated.
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Affiliation(s)
- Jevin Lortie
- Department of Nutritional Sciences, University of Wisconsin-Madison, Madison, WI, USA
| | - Grace Gage
- Department of Nutritional Sciences, University of Wisconsin-Madison, Madison, WI, USA
| | - Benjamin Rush
- Department of Nutritional Sciences, University of Wisconsin-Madison, Madison, WI, USA
| | - Steven B Heymsfield
- Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, USA
| | | | - Adam J Kuchnia
- Department of Nutritional Sciences, University of Wisconsin-Madison, Madison, WI, USA
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19
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Detection of 4-nitrophenol in wastewater using microstructures of various morphologies. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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20
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Maes A, Pestiaux C, Marino A, Balcaen T, Leyssens L, Vangrunderbeeck S, Pyka G, De Borggraeve WM, Bertrand L, Beauloye C, Horman S, Wevers M, Kerckhofs G. Cryogenic contrast-enhanced microCT enables nondestructive 3D quantitative histopathology of soft biological tissues. Nat Commun 2022; 13:6207. [PMID: 36266273 PMCID: PMC9584947 DOI: 10.1038/s41467-022-34048-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Accepted: 10/12/2022] [Indexed: 12/24/2022] Open
Abstract
Biological tissues comprise a spatially complex structure, composition and organization at the microscale, named the microstructure. Given the close structure-function relationships in tissues, structural characterization is essential to fully understand the functioning of healthy and pathological tissues, as well as the impact of possible treatments. Here, we present a nondestructive imaging approach to perform quantitative 3D histo(patho)logy of biological tissues, termed Cryogenic Contrast-Enhanced MicroCT (cryo-CECT). By combining sample staining, using an X-ray contrast-enhancing staining agent, with freezing the sample at the optimal freezing rate, cryo-CECT enables 3D visualization and structural analysis of individual tissue constituents, such as muscle and collagen fibers. We applied cryo-CECT on murine hearts subjected to pressure overload following transverse aortic constriction surgery. Cryo-CECT allowed to analyze, in an unprecedented manner, the orientation and diameter of the individual muscle fibers in the entire heart, as well as the 3D localization of fibrotic regions within the myocardial layers. We foresee further applications of cryo-CECT in the optimization of tissue/food preservation and donor banking, showing that cryo-CECT also has clinical and industrial potential.
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Affiliation(s)
- Arne Maes
- Department of Materials Engineering, KU Leuven, Heverlee, Belgium
- Biomechanics lab, Institute of Mechanics, Materials and Civil Engineering, UCLouvain, Louvain-la-Neuve, Belgium
- Pole of Morphology, Institute of Experimental and Clinical Research, UCLouvain, Brussels, Belgium
| | - Camille Pestiaux
- Biomechanics lab, Institute of Mechanics, Materials and Civil Engineering, UCLouvain, Louvain-la-Neuve, Belgium
- Pole of Morphology, Institute of Experimental and Clinical Research, UCLouvain, Brussels, Belgium
| | - Alice Marino
- Pole of Cardiovascular Research, Institute of Experimental and Clinical Research, UCLouvain, Brussels, Belgium
| | - Tim Balcaen
- Biomechanics lab, Institute of Mechanics, Materials and Civil Engineering, UCLouvain, Louvain-la-Neuve, Belgium
- Pole of Morphology, Institute of Experimental and Clinical Research, UCLouvain, Brussels, Belgium
- Molecular Design and Synthesis, Department of Chemistry, KU Leuven, Leuven, Belgium
| | - Lisa Leyssens
- Biomechanics lab, Institute of Mechanics, Materials and Civil Engineering, UCLouvain, Louvain-la-Neuve, Belgium
- Pole of Morphology, Institute of Experimental and Clinical Research, UCLouvain, Brussels, Belgium
| | - Sarah Vangrunderbeeck
- Biomechanics lab, Institute of Mechanics, Materials and Civil Engineering, UCLouvain, Louvain-la-Neuve, Belgium
- Pole of Morphology, Institute of Experimental and Clinical Research, UCLouvain, Brussels, Belgium
- Molecular Design and Synthesis, Department of Chemistry, KU Leuven, Leuven, Belgium
| | - Grzegorz Pyka
- Biomechanics lab, Institute of Mechanics, Materials and Civil Engineering, UCLouvain, Louvain-la-Neuve, Belgium
- Pole of Morphology, Institute of Experimental and Clinical Research, UCLouvain, Brussels, Belgium
| | - Wim M De Borggraeve
- Molecular Design and Synthesis, Department of Chemistry, KU Leuven, Leuven, Belgium
| | - Luc Bertrand
- Pole of Cardiovascular Research, Institute of Experimental and Clinical Research, UCLouvain, Brussels, Belgium
| | | | - Sandrine Horman
- Pole of Cardiovascular Research, Institute of Experimental and Clinical Research, UCLouvain, Brussels, Belgium
| | - Martine Wevers
- Department of Materials Engineering, KU Leuven, Heverlee, Belgium
| | - Greet Kerckhofs
- Department of Materials Engineering, KU Leuven, Heverlee, Belgium.
- Biomechanics lab, Institute of Mechanics, Materials and Civil Engineering, UCLouvain, Louvain-la-Neuve, Belgium.
- Pole of Morphology, Institute of Experimental and Clinical Research, UCLouvain, Brussels, Belgium.
- Prometheus, Division for Skeletal Tissue Engineering, KU Leuven, Leuven, Belgium.
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21
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Jeong Y, Jin M, Kim KS, Na K. Biocompatible carbonized iodine-doped dots for contrast-enhanced CT imaging. Biomater Res 2022; 26:27. [PMID: 35752823 PMCID: PMC9233767 DOI: 10.1186/s40824-022-00277-3] [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] [Received: 04/20/2022] [Accepted: 06/13/2022] [Indexed: 11/24/2022] Open
Abstract
Background Computed tomography (CT) imaging has been widely used for the diagnosis and surveillance of diseases. Although CT is attracting attention due to its reasonable price, short scan time, and excellent diagnostic ability, there are severe drawbacks of conventional CT contrast agents, such as low sensitivity, serious toxicity, and complicated synthesis process. Herein, we describe iodine-doped carbon dots (IDC) for enhancing the abilities of CT contrast agents. Method IDC was synthesized by one-pot hydrothermal synthesis for 4 h at 180 ℃ and analysis of its structure and size distribution with UV–Vis, XPS, FT-IR, NMR, TEM, and DLS. Furthermore, the CT values of IDC were calculated and compared with those of conventional CT contrast agents (Iohexol), and the in vitro and in vivo toxicities of IDC were determined to prove their safety. Results IDC showed improved CT contrast enhancement compared to iohexol. The biocompatibility of the IDC was verified via cytotoxicity tests, hemolysis assays, chemical analysis, and histological analysis. The osmotic pressure of IDC was lower than that of iohexol, resulting in no dilution-induced contrast decrease in plasma. Conclusion Based on these results, the remarkable CT contrast enhancement and biocompatibility of IDC can be used as an effective CT contrast agent for the diagnosis of various diseases compared with conventional CT contrast agents. Supplementary Information The online version contains supplementary material available at 10.1186/s40824-022-00277-3.
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Affiliation(s)
- Yohan Jeong
- Department of Biotechnology, The Catholic University of Korea, 43 Jibong-ro, Wonmi-gu, Bucheon-si, Gyeonggi do, 14662, Republic of Korea.,Department of Research and Developmnet, SML Genetree, Seoul, 06741, Republic of Korea.,Department of BioMedical-Chemical Engineering, The Catholic University of Korea, 43 Jibong-ro, Wonmi-gu, Bucheon-si, Gyeonggi do, 14662, Republic of Korea
| | - Minyoung Jin
- Department of Biotechnology, The Catholic University of Korea, 43 Jibong-ro, Wonmi-gu, Bucheon-si, Gyeonggi do, 14662, Republic of Korea.,Department of BioMedical-Chemical Engineering, The Catholic University of Korea, 43 Jibong-ro, Wonmi-gu, Bucheon-si, Gyeonggi do, 14662, Republic of Korea
| | - Kyoung Sub Kim
- Department of Biotechnology, The Catholic University of Korea, 43 Jibong-ro, Wonmi-gu, Bucheon-si, Gyeonggi do, 14662, Republic of Korea
| | - Kun Na
- Department of Biotechnology, The Catholic University of Korea, 43 Jibong-ro, Wonmi-gu, Bucheon-si, Gyeonggi do, 14662, Republic of Korea. .,Department of BioMedical-Chemical Engineering, The Catholic University of Korea, 43 Jibong-ro, Wonmi-gu, Bucheon-si, Gyeonggi do, 14662, Republic of Korea.
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22
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Lin J, Jiao G, Kermanshahi-pour A. Algal Polysaccharides-Based Hydrogels: Extraction, Synthesis, Characterization, and Applications. Mar Drugs 2022; 20:306. [PMID: 35621958 PMCID: PMC9146341 DOI: 10.3390/md20050306] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 04/25/2022] [Accepted: 04/27/2022] [Indexed: 02/04/2023] Open
Abstract
Hydrogels are three-dimensional crosslinked hydrophilic polymer networks with great potential in drug delivery, tissue engineering, wound dressing, agrochemicals application, food packaging, and cosmetics. However, conventional synthetic polymer hydrogels may be hazardous and have poor biocompatibility and biodegradability. Algal polysaccharides are abundant natural products with biocompatible and biodegradable properties. Polysaccharides and their derivatives also possess unique features such as physicochemical properties, hydrophilicity, mechanical strength, and tunable functionality. As such, algal polysaccharides have been widely exploited as building blocks in the fabrication of polysaccharide-based hydrogels through physical and/or chemical crosslinking. In this review, we discuss the extraction and characterization of polysaccharides derived from algae. This review focuses on recent advances in synthesis and applications of algal polysaccharides-based hydrogels. Additionally, we discuss the techno-economic analyses of chitosan and acrylic acid-based hydrogels, drawing attention to the importance of such analyses for hydrogels. Finally, the future prospects of algal polysaccharides-based hydrogels are outlined.
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Affiliation(s)
- Jianan Lin
- Biorefining and Remediation Laboratory, Department of Process Engineering and Applied Science, Dalhousie University, 1360 Barrington St., Halifax, NS B3J 1Z1, Canada;
| | - Guangling Jiao
- AKSO Marine Biotech Inc., Suite 3, 1697 Brunswick St., Halifax, NS B3J 2G3, Canada;
| | - Azadeh Kermanshahi-pour
- Biorefining and Remediation Laboratory, Department of Process Engineering and Applied Science, Dalhousie University, 1360 Barrington St., Halifax, NS B3J 1Z1, Canada;
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23
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Zamora-Perez P, Xiao C, Sanles-Sobrido M, Rovira-Esteva M, Conesa JJ, Mulens-Arias V, Jaque D, Rivera-Gil P. Multiphoton imaging of melanoma 3D models with plasmonic nanocapsules. Acta Biomater 2022; 142:308-319. [PMID: 35104657 DOI: 10.1016/j.actbio.2022.01.052] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 01/04/2022] [Accepted: 01/25/2022] [Indexed: 12/11/2022]
Abstract
We report the synthesis of plasmonic nanocapsules and the cellular responses they induce in 3D melanoma models for their perspective use as a photothermal therapeutic agent. The wall of the nanocapsules is composed of polyelectrolytes. The inner part is functionalized with discrete gold nanoislands. The cavity of the nanocapsules contains a fluorescent payload to show their ability for loading a cargo. The nanocapsules exhibit simultaneous two-photon luminescent, fluorescent properties and X-ray contrasting ability. The average fluorescence lifetime (τ) of the nanocapsules measured with FLIM (0.3 ns) is maintained regardless of the intracellular environment, thus proving their abilities for bioimaging of models such as 3D spheroids with a complex architecture. Their multimodal imaging properties are exploited for the first time to study tumorspheres cellular responses exposed to the nanocapsules. Specifically, we studied cellular uptake, toxicity, intracellular fate, generation of reactive oxygen species, and effect on the levels of hypoxia by using multi-photon and confocal laser scanning microscopy. Because of the high X-ray attenuation and atomic number of the gold nanostructure, we imaged the nanocapsule-cell interactions without processing the sample. We confirmed maintenance of the nanocapsules' geometry in the intracellular milieu with no impairment of the cellular ultrastructure. Furthermore, we observed the lack of cellular toxicity and no alteration in oxygen or reactive oxygen species levels. These results in 3D melanoma models contribute to the development of these nanocapsules for their exploitation in future applications as agents for imaging-guided photothermal therapy. STATEMENT OF SIGNIFICANCE: The novelty of the work is that our plasmonic nanocapsules are multimodal. They are responsive to X-ray and to multiphoton and single-photon excitation. This allowed us to study their interaction with 2D and 3D cellular structures and specifically to obtain information on tumor cell parameters such as hypoxia, reactive oxygen species, and toxicity. These nanocapsules will be further validated as imaging-guided photothermal probes.
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24
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Di Gregorio E, Arena F, Gianolio E, Ferrauto G, Aime S. The interaction between iodinated X‐ray contrast agents and macrocyclic
GBCAs
provides a signal enhancement in
T
1
‐weighted MR
images: Insights into the renal excretion pathways of
Gd‐HPDO3A
and iodixanol in healthy mice. Magn Reson Med 2022; 88:357-364. [PMID: 35253921 PMCID: PMC9314041 DOI: 10.1002/mrm.29190] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 12/15/2021] [Accepted: 01/18/2022] [Indexed: 12/17/2022]
Abstract
Purpose This work aims to investigate the supramolecular binding interactions that occur between iodinated X‐ray contrast agents (CAs) and macrocyclic gadolinium (Gd)–based MRI contrast agents (GBCAs). This study provides some new insights in the renal excretion pathways of the two types of imaging probes. Methods The water‐proton relaxivities (r1) of clinically approved macrocyclic and linear GBCAs have been measured in the presence of different iodinated X‐ray contrast agents at different magnetic field strengths in buffer and in serum. The in vivo MRI and X‐ray CT of mice injected with either Gd‐HPDO3A or a Gd‐HPDO3A + iodixanol mixture were then acquired to assess the biodistribution of the two probes. Results A significant increase in r1 (up to approximately 200%) was observed for macrocyclic GBCAs when measured in the presence of an excess of iodinated X‐ray CAs (1:100 mol:mol) in serum. The co‐administration of Gd‐HPDO3A and iodixanol in vivo resulted in a marked increase in the signal intensity of the kidney regions in T1‐weighted MR images. Moreover, the co‐presence of the two agents resulted in the extended persistence of the MRI signal enhancement, suggesting that the Gd‐HPDO3A/iodixanol adduct was eliminated more slowly than the typical washing out of Gd‐HPDO3A. Conclusions The reported results show that it is possible to detect the co‐presence of iodinated agents and macrocyclic GBCAs in contrast‐enhanced MR images. The new information may be useful in the design of novel experiments toward improved diagnostic outcomes.
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Affiliation(s)
- Enza Di Gregorio
- Molecular Imaging Center, Department of Molecular Biotechnology and Health Sciences University of Turin Turin Italy
| | - Francesca Arena
- Molecular Imaging Center, Department of Molecular Biotechnology and Health Sciences University of Turin Turin Italy
| | - Eliana Gianolio
- Molecular Imaging Center, Department of Molecular Biotechnology and Health Sciences University of Turin Turin Italy
| | - Giuseppe Ferrauto
- Molecular Imaging Center, Department of Molecular Biotechnology and Health Sciences University of Turin Turin Italy
| | - Silvio Aime
- Istituto di ricovero e cura a carattere scientifico Naples Italy
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25
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Koca M, Sevinç Özakar R, Ozakar E, Sade R, Pirimoğlu B, Şimsek Özek N, Aysin F. Preparation and Characterization of Nanosuspensions of Triiodoaniline Derivative New Contrast Agent, and Investigation into Its Cytotoxicity and Contrast Properties. IRANIAN JOURNAL OF PHARMACEUTICAL RESEARCH 2022; 21:e123824. [PMID: 35765507 PMCID: PMC9191222 DOI: 10.5812/ijpr.123824] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 11/23/2021] [Accepted: 11/24/2021] [Indexed: 01/30/2023]
Abstract
Iodine-based contrast agents have limitations such as rapid clearance, potential renal toxicity, non-specific blood pool distribution, headache, and adverse events. Nowadays, it is quite common to work with nanosized systems in order to eliminate the side effects of contrast agents. This study aims to synthesize a new iodinated contrast agent, prepare its nanosuspension by using the nanoprecipitation method, investigate its cytotoxicity, and compare its contrast properties with iohexol and iopromide through in-vitro experiments. The values of nanosuspension particle size and zeta potential have been found to be ~ 400 nm and ~ (-) 15 mV, respectively. In-vitro cellular viability findings indicated that the nanosuspension has lower cytotoxicity than the iohexol and iopromide. In the computed tomography (CT) imaging study of contrast features of nanosuspensions and two commercial agents, which involved 86 CT examinations using 31 parameters and two different devices, it was found that iodine had a stronger presence in its nanosuspension form than in iohexol and iopromide, which were the other two commercial contrast agents, when used in equal amounts. Thus in the case of nanosuspensions contrast brightness was achieved by using less iodine, while the same brightness could be obtained with higher doses of iohexol and iopromide. CT imaging therefore be done without much chemical use, which indicates that it may witness fewer side effects in the future.
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Affiliation(s)
- Mehmet Koca
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Atatürk University, Erzurum, Turkey
| | - Rukiye Sevinç Özakar
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Atatürk University, Erzurum, Turkey
- Corresponding Author: Department of Pharmaceutical Technology, Faculty of Pharmacy, Atatürk University, Erzurum, Turkey.
| | - Emrah Ozakar
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Atatürk University, Erzurum, Turkey
| | - Recep Sade
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Atatürk University, Erzurum, Turkey
| | - Berhan Pirimoğlu
- Department of Radiology, Faculty of Medicine, Atatürk University, Erzurum, Turkey
| | - Nihal Şimsek Özek
- Department of Biology, Faculty of Science, Atatürk University, Erzurum, Turkey
| | - Ferhunde Aysin
- Department of Biology, Faculty of Science, Atatürk University, Erzurum, Turkey
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26
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Nieves LM, Mossburg K, Hsu JC, Maidment ADA, Cormode DP. Silver chalcogenide nanoparticles: a review of their biomedical applications. NANOSCALE 2021; 13:19306-19323. [PMID: 34783806 PMCID: PMC8647685 DOI: 10.1039/d0nr03872e] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Silver chalcogenide (Ag2X, where X = S, Se, or Te) nanoparticles have been extensively investigated for their applications in electronics but have only recently been explored for biomedical applications. In the past 10 years, Ag2X, primarily silver sulfides at first, have become of great importance as quantum dots, since they not only possess excellent deep tissue imaging properties in the near-infrared regions I and II, but also have low toxicities. Their appealing properties have led to numerous recent developments of Ag2X for biomedical applications. Furthermore, Ag2X have been discovered in the past 2-3 years to be potent X-ray contrast agents, adding to the numerous biomedical uses of these nanoparticles. In this review, we discuss the most recent advances in silver chalcogenide nanoparticle use in areas such as bio-imaging, theranostics, and biosensors. Moreover, we examine the advances in synthetic approaches for these nanoparticles, which include aqueous and organic syntheses routes. Finally, we discuss the advantages and current limitations in the use of silver chalcogenides for different biomedical applications and their potential for advancement and expansions in use.
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Affiliation(s)
- Lenitza M Nieves
- Biochemistry and Molecular Biophysics Graduate Group, University of Pennsylvania, Philadelphia, PA, USA
- Radiology Department, University of Pennsylvania, Philadelphia, PA, USA.
| | - Katherine Mossburg
- Radiology Department, University of Pennsylvania, Philadelphia, PA, USA.
- Bioengineering Department, University of Pennsylvania, Philadelphia, PA, USA
| | - Jessica C Hsu
- Radiology Department, University of Pennsylvania, Philadelphia, PA, USA.
- Bioengineering Department, University of Pennsylvania, Philadelphia, PA, USA
| | | | - David P Cormode
- Radiology Department, University of Pennsylvania, Philadelphia, PA, USA.
- Bioengineering Department, University of Pennsylvania, Philadelphia, PA, USA
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27
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Zhang J, Liu W, Zhang P, Song Y, Ye Z, Fu H, Yang S, Qin Q, Guo Z, Zhang J. Polymers for Improved Delivery of Iodinated Contrast Agents. ACS Biomater Sci Eng 2021; 8:32-53. [PMID: 34851607 DOI: 10.1021/acsbiomaterials.1c01082] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
X-ray computed tomography (CT), as one of the most widely used noninvasive imaging modalities, can provide three-dimensional anatomic details with high resolution, which plays a key role in disease diagnosis and treatment assessment. However, although they are the most prevalent and FDA-approved contrast agents, iodinated water-soluble molecules still face some challenges in clinical applications, such as fast clearance, serious adverse effects, nonspecific distribution, and low sensitivity. Because of their high biocompatibility, tunable designability, controllable biodegradation, facile synthesis, and modification capability, the polymers have demonstrated great potential for efficient delivery of iodinated contrast agents (ICAs). Herein, we comprehensively summarized the applications of multifunctional polymeric materials for ICA delivery in terms of increasing circulation time, decreasing nephrotoxicity, and improving the specificity and sensitivity of ICAs for CT imaging. We mainly focused on various iodinated polymers from the aspects of preparation, functionalization, and application in medical diagnosis. Future perspectives for achieving better imaging and clinical translation are also discussed to motivate new technologies and solutions.
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Affiliation(s)
- Jing Zhang
- Department of Cardiology, Tianjin Chest Hospital, Tianjin University, Tianjin 300222, China
| | - Weiming Liu
- Department of Cardiology, Tianjin Chest Hospital, Tianjin University, Tianjin 300222, China.,Department of Polymer Science and Engineering, Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
| | - Peng Zhang
- Department of Cardiology, Tianjin Chest Hospital, Tianjin University, Tianjin 300222, China
| | - Yanqiu Song
- Department of Cardiology, Tianjin Chest Hospital, Tianjin University, Tianjin 300222, China
| | - Zhanpeng Ye
- Department of Polymer Science and Engineering, Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
| | - Han Fu
- Graduate School of Tianjin Medical University, Tianjin 300070, China
| | - Shicheng Yang
- Department of Cardiology, Tianjin Chest Hospital, Tianjin University, Tianjin 300222, China
| | - Qin Qin
- Department of Cardiology, Tianjin Chest Hospital, Tianjin University, Tianjin 300222, China
| | - Zhigang Guo
- Department of Cardiology, Tianjin Chest Hospital, Tianjin University, Tianjin 300222, China
| | - Jianhua Zhang
- Department of Polymer Science and Engineering, Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China.,Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin University, Tianjin 300350, China
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28
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Tarighatnia A, Fouladi MR, Tohidkia MR, Johal G, Nader ND, Aghanejad A, Ghadiri H. Engineering and quantification of bismuth nanoparticles as targeted contrast agent for computed tomography imaging in cellular and animal models. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102895] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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29
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Zhang P, Ma X, Guo R, Ye Z, Fu H, Fu N, Guo Z, Zhang J, Zhang J. Organic Nanoplatforms for Iodinated Contrast Media in CT Imaging. Molecules 2021; 26:7063. [PMID: 34885645 PMCID: PMC8658861 DOI: 10.3390/molecules26237063] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Revised: 10/04/2021] [Accepted: 10/06/2021] [Indexed: 12/29/2022] Open
Abstract
X-ray computed tomography (CT) imaging can produce three-dimensional and high-resolution anatomical images without invasion, which is extremely useful for disease diagnosis in the clinic. However, its applications are still severely limited by the intrinsic drawbacks of contrast media (mainly iodinated water-soluble molecules), such as rapid clearance, serious toxicity, inefficient targetability and poor sensitivity. Due to their high biocompatibility, flexibility in preparation and modification and simplicity for drug loading, organic nanoparticles (NPs), including liposomes, nanoemulsions, micelles, polymersomes, dendrimers, polymer conjugates and polymeric particles, have demonstrated tremendous potential for use in the efficient delivery of iodinated contrast media (ICMs). Herein, we comprehensively summarized the strategies and applications of organic NPs, especially polymer-based NPs, for the delivery of ICMs in CT imaging. We mainly focused on the use of polymeric nanoplatforms to prolong circulation time, reduce toxicity and enhance the targetability of ICMs. The emergence of some new technologies, such as theragnostic NPs and multimodal imaging and their clinical translations, are also discussed.
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Affiliation(s)
- Peng Zhang
- Department of Cardiology, Tianjin Chest Hospital, Tianjin University, Tianjin 300222, China; (P.Z.); (X.M.); (N.F.); (Z.G.)
| | - Xinyu Ma
- Department of Cardiology, Tianjin Chest Hospital, Tianjin University, Tianjin 300222, China; (P.Z.); (X.M.); (N.F.); (Z.G.)
- Key Laboratory of Systems Bioengineering of the Ministry of Education, Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China; (R.G.); (Z.Y.)
| | - Ruiwei Guo
- Key Laboratory of Systems Bioengineering of the Ministry of Education, Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China; (R.G.); (Z.Y.)
| | - Zhanpeng Ye
- Key Laboratory of Systems Bioengineering of the Ministry of Education, Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China; (R.G.); (Z.Y.)
| | - Han Fu
- Graduate School, Tianjin Medical University, Tianjin 300070, China;
| | - Naikuan Fu
- Department of Cardiology, Tianjin Chest Hospital, Tianjin University, Tianjin 300222, China; (P.Z.); (X.M.); (N.F.); (Z.G.)
| | - Zhigang Guo
- Department of Cardiology, Tianjin Chest Hospital, Tianjin University, Tianjin 300222, China; (P.Z.); (X.M.); (N.F.); (Z.G.)
| | - Jianhua Zhang
- Key Laboratory of Systems Bioengineering of the Ministry of Education, Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China; (R.G.); (Z.Y.)
- Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin University, Tianjin 300350, China
| | - Jing Zhang
- Department of Cardiology, Tianjin Chest Hospital, Tianjin University, Tianjin 300222, China; (P.Z.); (X.M.); (N.F.); (Z.G.)
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30
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S IP, M VP, K S. Near-infrared optical spectroscopy for pancreas shrinkage estimation with multi synchrosqueezing transform and multivariate regression model. Microsc Res Tech 2021; 85:697-707. [PMID: 34585815 DOI: 10.1002/jemt.23941] [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: 03/24/2021] [Revised: 08/26/2021] [Accepted: 08/29/2021] [Indexed: 11/08/2022]
Abstract
In this article, we proposed a method to estimate pancreas shrinkage with pancreas β cell insulin secretion. The β cells in the pancreas secrete insulin and digestive enzymes after food consumption. Conventionally, the pancreas structure estimation is done with magnetic resonance imaging (MRI) and ultrasound imaging techniques. However, the structure of the pancreas changes due to islet cell death. The presence of islet cells is detected through near infrared (NIR) spectroscopy signal acquired from the epigastric region (pancreas) of the abdomen. Subsequently, the NIR spectroscopy signal from the pancreas is analyzed with multi synchrosqueezing transform (MSST); whereas, the β cell insulin secretion varies for diabetic and nondiabetic persons. The existence of β cell and insulin secretion correlates with Root Mean Square (RMS) and kurtosis via a multivariate regression model to evaluate pancreas shrinkage. In terms of numerical results, NIR spectroscopy signal from the pancreas was obtained for about 20 nondiabetic and 20 diabetic persons. The pancreas shrinkage was estimated with 88% accuracy. The results are validated with MRI pancreas images for earlier detection of the apoptotic pancreas. The pancreas shrinkage causes lower insulin emission and unpredictable blood glucose in diabetic patients. Analysis of NIR spectroscopy signals of the pancreas with MSST was done to obtain higher-order and lower-order frequency components.
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Affiliation(s)
- Indra Priyadharshini S
- Department of Computer Science and Engineering, RMK College of Engineering and Technology, Puduvoyal, India
| | - Vigilson Prem M
- Department of Computer Science and Engineering, RMK College of Engineering and Technology, Puduvoyal, India
| | - Suresh K
- Associate Professor, Center for Artificial Intelligence, Chennai Institute of Technology, Kundrathur, Chennai, India
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Insights into the Development of Phototrophic Biofilms in a Bioreactor by a Combination of X-ray Microtomography and Optical Coherence Tomography. Microorganisms 2021; 9:microorganisms9081743. [PMID: 34442822 PMCID: PMC8398007 DOI: 10.3390/microorganisms9081743] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 08/06/2021] [Accepted: 08/12/2021] [Indexed: 11/29/2022] Open
Abstract
As productive biofilms are increasingly gaining interest in research, the quantitative monitoring of biofilm formation on- or offline for the process remains a challenge. Optical coherence tomography (OCT) is a fast and often used method for scanning biofilms, but it has difficulty scanning through more dense optical materials. X-ray microtomography (μCT) can measure biofilms in most geometries but is very time-consuming. By combining both methods for the first time, the weaknesses of both methods could be compensated. The phototrophic cyanobacterium Tolypothrix distorta was cultured in a moving bed photobioreactor inside a biocarrier with a semi-enclosed geometry. An automated workflow was developed to process µCT scans of the biocarriers. This allowed quantification of biomass volume and biofilm-coverage on the biocarrier, both globally and spatially resolved. At the beginning of the cultivation, a growth limitation was detected in the outer region of the carrier, presumably due to shear stress. In the later phase, light limitations could be found inside the biocarrier. µCT data and biofilm thicknesses measured by OCT displayed good correlation. The latter could therefore be used to rapidly measure the biofilm formation in a process. The methods presented here can help gain a deeper understanding of biofilms inside a process and detect any limitations.
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Architectural properties of the musculoskeletal system in the shoulder of two callitrichid primate species derived from virtual dissection. Primates 2021; 62:827-843. [PMID: 34181123 PMCID: PMC8410736 DOI: 10.1007/s10329-021-00917-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 05/06/2021] [Indexed: 12/31/2022]
Abstract
Callitrichidae are small, arboreal New World primates that utilize a variety of locomotor behaviors including trunk-to-trunk leaping (TTL) and horizontal locomotion which involve differential functional demands. Little is known about the relationship between the preferred locomotor behavior and musculoskeletal architecture of these primates. In this study, we compared the musculoskeletal architecture of selected shoulder muscles in two cadavers each of the trunk-to-trunk leaper Cebuella pygmaea and the mainly pronograde quadrupedally moving Saguinus imperator subgrisescens. Contrast-enhanced microfocus computed tomography (µCT) was used to virtually dissect the cadavers, produce muscle maps, and create 3D reconstructions for an image-based analysis of the muscles. Muscle lengths, muscle volumes, and osteological muscle moment arms were measured, and the anatomical cross-sectional areas (ACSA) were calculated. We expected the muscles of the forelimb of S. imperator to be larger in volume and to be relatively shorter with a larger ACSA due to a higher demand for powerful extension in the forelimbs of this horizontally locomoting species. For C. pygmaea, we expected relatively larger moment arms for the triceps brachii, supraspinatus, infraspinatus and subscapularis, as larger moment arms present an advantage for extensive vertical clinging on the trunk. The muscles of S. imperator were relatively larger in volume than in C. pygmaea and had a relatively larger ACSA. Thus, the shoulder muscles of S. imperator were suited to generate relatively larger forces than those of C. pygmaea. Contrary to our expectations, there were only slight differences between species in regard to muscle lengths and moment arms, which suggests that these properties are not dependent on the preferred locomotor mode. The study of this limited dataset demonstrates that some but not all properties of the musculoskeletal architecture reflect the preferred locomotor behavior in the two species of Callitrichidae examined.
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Beaumont M, Tran R, Vera G, Niedrist D, Rousset A, Pierre R, Shastri VP, Forget A. Hydrogel-Forming Algae Polysaccharides: From Seaweed to Biomedical Applications. Biomacromolecules 2021; 22:1027-1052. [PMID: 33577286 PMCID: PMC7944484 DOI: 10.1021/acs.biomac.0c01406] [Citation(s) in RCA: 100] [Impact Index Per Article: 33.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 01/29/2021] [Indexed: 12/22/2022]
Abstract
With the increasing growth of the algae industry and the development of algae biorefinery, there is a growing need for high-value applications of algae-extracted biopolymers. The utilization of such biopolymers in the biomedical field can be considered as one of the most attractive applications but is challenging to implement. Historically, polysaccharides extracted from seaweed have been used for a long time in biomedical research, for example, agarose gels for electrophoresis and bacterial culture. To overcome the current challenges in polysaccharides and help further the development of high-added-value applications, an overview of the entire polysaccharide journey from seaweed to biomedical applications is needed. This encompasses algae culture, extraction, chemistry, characterization, processing, and an understanding of the interactions of soft matter with living organisms. In this review, we present algae polysaccharides that intrinsically form hydrogels: alginate, carrageenan, ulvan, starch, agarose, porphyran, and (nano)cellulose and classify these by their gelation mechanisms. The focus of this review further lays on the culture and extraction strategies to obtain pure polysaccharides, their structure-properties relationships, the current advances in chemical backbone modifications, and how these modifications can be used to tune the polysaccharide properties. The available techniques to characterize each organization scale of a polysaccharide hydrogel are presented, and the impact on their interactions with biological systems is discussed. Finally, a perspective of the anticipated development of the whole field and how the further utilization of hydrogel-forming polysaccharides extracted from algae can revolutionize the current algae industry are suggested.
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Affiliation(s)
- Marco Beaumont
- Queensland
University of Technology, Brisbane, Australia
| | - Remy Tran
- Institute
for Macromolecular Chemistry, University
of Freiburg, Freiburg, Germany
| | - Grace Vera
- Institute
for Macromolecular Chemistry, University
of Freiburg, Freiburg, Germany
| | - Dennis Niedrist
- Institute
for Macromolecular Chemistry, University
of Freiburg, Freiburg, Germany
| | - Aurelie Rousset
- Centre
d’Étude et de Valorisation des Algues, Pleubian, France
| | - Ronan Pierre
- Centre
d’Étude et de Valorisation des Algues, Pleubian, France
| | - V. Prasad Shastri
- Institute
for Macromolecular Chemistry, University
of Freiburg, Freiburg, Germany
- Centre
for Biological Signalling Studies, University
of Freiburg, Frieburg, Germany
| | - Aurelien Forget
- Institute
for Macromolecular Chemistry, University
of Freiburg, Freiburg, Germany
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Ritter C, Maier E, Schneeweiß U, Wölk T, Simonnet J, Malkawi S, Eigen L, Tunckol E, Purkart L, Brecht M. An isomorphic three-dimensional cortical model of the pig rostrum. J Comp Neurol 2020; 529:2070-2090. [PMID: 33225441 DOI: 10.1002/cne.25073] [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] [Received: 06/10/2020] [Revised: 10/09/2020] [Accepted: 10/12/2020] [Indexed: 12/20/2022]
Abstract
Physiological studies of the last century mapped a somatosensory cortical gyrus representing the pig's rostrum. Here, we describe the extraordinary correspondence of this gyrus to the rostrum. The pig rostrum is packed with microvibrissae (~470 per hemi-rostrum) and innervated by a prominent infraorbital nerve, containing about 80,000 axons. The pig's rostrum has three major skin-folds. The nostrils have a rectangular medial wall and a funnel-like lateral opening, nasal channels run obliquely from lateral (surface) to medial (inside). The rostrum gyrus mimics rostrum geometry in great detail. The putative representation of skin folds coincides with blood sinus and folds of the rostrum gyrus. The putative nostril representation is an oblique sulcus running from lateral (surface) to medial (inside). As observed in rodents, Layer 4 is thin in the nostril sulcus. The side of the nostril sulcus representing the medial wall of the nostril is rectangular, whereas the side of the nostril sulcus representing the lateral wall is funnel-like. Proportions and geometry of the rostrum and the rostrum gyrus are similar, albeit with a collapsed nostril and a larger interindividual variability in the gyrus. The pig's cortical rostrum gyrus receives dense thalamic innervation, has a thin Layer 1 and contains roughly 8 million neurons. With all that, the rostrum gyrus looks like a model of the pig rostrum at a scale of ~1:2. Our findings are reminiscent of the raccoon cortex with its forepaw-like somatosensory forepaw-representation. Representing highly relevant afferents in three-dimensional body-part-models might facilitate isomorphic cortical computations in large-brained tactile specialists.
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Affiliation(s)
- Cindy Ritter
- Bernstein Center for Computational Neuroscience Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Eduard Maier
- Bernstein Center for Computational Neuroscience Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Undine Schneeweiß
- Bernstein Center for Computational Neuroscience Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Tanja Wölk
- Bernstein Center for Computational Neuroscience Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Jean Simonnet
- Bernstein Center for Computational Neuroscience Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Safaa Malkawi
- Bernstein Center for Computational Neuroscience Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Lennart Eigen
- Bernstein Center for Computational Neuroscience Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Elcin Tunckol
- Bernstein Center for Computational Neuroscience Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Leopold Purkart
- Bernstein Center for Computational Neuroscience Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Michael Brecht
- Bernstein Center for Computational Neuroscience Berlin, Humboldt-Universität zu Berlin, Berlin, Germany.,NeuroCure Cluster of Excellence, Humboldt-Universität zu Berlin, Berlin, Germany
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Aslan N, Ceylan B, Koç MM, Findik F. Metallic nanoparticles as X-Ray computed tomography (CT) contrast agents: A review. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128599] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Murillo-González JA, Notario B, Maldonado E, Martinez-Sanz E, Barrio MC, Herrera M. Connections between the internal and the external capsules and the globus pallidus in the sheep: A dichromate stain X-ray microtomographic study. Anat Histol Embryol 2020; 50:84-92. [PMID: 32794251 DOI: 10.1111/ahe.12604] [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: 03/19/2020] [Accepted: 07/24/2020] [Indexed: 11/28/2022]
Abstract
Sheep are recognized as useful species for translational neurodegeneration research, in particular for the study of Huntington disease. There is a lack of information regarding the detailed anatomy and connections of the basal ganglia of sheep, in normal myeloarchitectonics and in tract-tracing studies. In this work, the organization of the corticostriatal projections at the level of the putamen and globus pallidus (GP) are explored. For the first time, the myeloarchitectonic pattern of connections between the internal (IC) and the external (EC) capsules with the GP have been investigated in the sheep. Formaldehyde-fixed blocks of the striatum were treated with a metallic stain containing potassium dichromate and visualized using micro-CT (µ-CT). The trivalent chromium (Cr3+), attached to myelin phospholipids, imparts a differential contrast to the grey and white matter compartments, which allows the visualization of myelinated fascicles in µ-CT images. The fascicles were classified according to their topographical location in dorsal supreme fascicles (X, Y, apex) arising from the IC and EC; pre-commissurally, basal fascicles connecting the ventral part of the EC with the lateral zone of the ventral pallidum (VP) and, post-commissurally, superior (Z1 ), middle (Z2 ) and lower (Z3 ) fascicles, connecting at different levels the EC with the GP. The results suggest that the presumptive cortical efferent and afferent fibres to the pallidum could be organized according to a dorsal to ventrolateral topography in the sheep, similar to that seen in other mammals. The proposed methodology has the potential to delineate the myeloarchitectonic patterns of nervous systems and tracts.
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Affiliation(s)
| | - Belen Notario
- Microcomputed Tomography Lab, Centro Nacional de Investigación sobre la Evolución Humana, CENIEH, Burgos, Spain
| | - Estela Maldonado
- Department of Anatomy and Embryology, Faculty of Medicine, Complutense University of Madrid, Madrid, Spain
| | - Elena Martinez-Sanz
- Department of Anatomy and Embryology, Faculty of Medicine, Complutense University of Madrid, Madrid, Spain
| | - M Carmen Barrio
- Department of Anatomy and Embryology, Faculty of Medicine, Complutense University of Madrid, Madrid, Spain
| | - Manuel Herrera
- Department of Anatomy and Embryology, Faculty of Medicine, Complutense University of Madrid, Madrid, Spain
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de Bournonville S, Vangrunderbeeck S, Ly HGT, Geeroms C, De Borggraeve WM, Parac-Vogt TN, Kerckhofs G. Exploring polyoxometalates as non-destructive staining agents for contrast-enhanced microfocus computed tomography of biological tissues. Acta Biomater 2020; 105:253-262. [PMID: 31996331 DOI: 10.1016/j.actbio.2020.01.038] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 01/08/2020] [Accepted: 01/22/2020] [Indexed: 11/28/2022]
Abstract
To advance clinical translation of regenerative medicine, there is, amongst others, still need for better insights in tissue development and disease. For this purpose, more precise imaging of the 3D microstructure and spatial interrelationships of the different tissues within organs is crucial. Despite being destructive towards the sample, conventional histology still is the gold standard for structural analysis of biological tissues. It is, however, limited by 2D sections of a 3D object, prohibiting full 3D structural analysis. MicroCT has proven to provide full 3D structural information of mineralized tissues and dense biomaterials. However, the intrinsic low X-ray absorption of soft tissues requires contrast-enhancing staining agents (CESAs). In a previous study, we showed that hafnium-substituted Wells-Dawson polyoxometalate (Hf-WD POM) allows simultaneous contrast-enhanced microCT (CE-CT) visualization of bone and its marrow vascularization and adiposity. In this study, other POM species have been examined for their potential as soft tissue CESAs. Four Wells-Dawson POMs, differing in structure and overall charge, were used to stain murine long bones and kidneys. Their staining potential and diffusion rate were compared to those of Hf-WD POM and phosphotungstic acid (PTA), a frequently used but destructive CESA. Monolacunary Wells-Dawson POM (Mono-WD POM) showed similar soft tissue enhancement as Hf-WD POM and PTA. Moreover, Mono-WD POM is less destructive, shows a better diffusion than PTA, and its synthesis requires less time and cost than Hf-WD POM. Finally, the solubility of Mono-WD POM was improved by addition of lithium chloride (LiCl) to the staining solution, enhancing further the soft tissue contrast. STATEMENT OF SIGNIFICANCE: To advance clinical translation of regenerative medicine, there is, amongst others, still need for better insights in tissue development and disease. For this purpose, more precise imaging of the 3D microstructure and spatial interrelationships of the different tissues within organs is crucial. Current standard structural analysis techniques (e.g. 2D histomorphometry), however, do not allow full 3D assessment. Contrast-enhanced X-ray computed tomography has emerged as a powerful 3D structural characterization tool of soft biological tissues. In this study, from a library of Wells Dawson polyoxometalates (WD POMs), we identified monolacunary WD POM together with lithium chloride, dissolved in phosphate buffered saline, as the most suitable contrast-enhancing staining agent solution for different biological tissues without tissue shrinkage.
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Affiliation(s)
- Sébastien de Bournonville
- Prometheus, Division of Skeletal Tissue Engineering, KU Leuven, Leuven, Belgium; Biomechanics Section, Department of Mechanical Engineering, KU Leuven, Leuven, Belgium
| | - Sarah Vangrunderbeeck
- Molecular Design and Synthesis, Department of Chemistry, KU Leuven, Leuven, Belgium; Biomechanics Lab, Institute of Mechanics, Materials, and Civil Engineering, UCLouvain, Louvain-la-Neuve, Belgium
| | - Hong Giang T Ly
- Molecular Design and Synthesis, Department of Chemistry, KU Leuven, Leuven, Belgium; Department of Chemistry, College of Natural Sciences, Can Tho University, Can Tho, Vietnam
| | - Carla Geeroms
- Prometheus, Division of Skeletal Tissue Engineering, KU Leuven, Leuven, Belgium; Skeletal Biology and Engineering Research Center, Department Development and Regeneration, KU Leuven, Leuven, Belgium
| | - Wim M De Borggraeve
- Molecular Design and Synthesis, Department of Chemistry, KU Leuven, Leuven, Belgium
| | - Tatjana N Parac-Vogt
- Molecular Design and Synthesis, Department of Chemistry, KU Leuven, Leuven, Belgium
| | - Greet Kerckhofs
- Prometheus, Division of Skeletal Tissue Engineering, KU Leuven, Leuven, Belgium; Biomechanics Lab, Institute of Mechanics, Materials, and Civil Engineering, UCLouvain, Louvain-la-Neuve, Belgium; IREC, Institute of Experimental and Clinical Research, UCLouvain, Woluwé-Saint-Lambert, Belgium; Department Materials Engineering, KU Leuven, Leuven, Belgium.
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Abstract
Recent developments within micro-computed tomography (μCT) imaging have combined to extend our capacity to image tissue in three (3D) and four (4D) dimensions at micron and sub-micron spatial resolutions, opening the way for virtual histology, live cell imaging, subcellular imaging and correlative microscopy. Pivotal to this has been the development of methods to extend the contrast achievable for soft tissue. Herein, we review the new capabilities within the field of life sciences imaging, and consider how future developments in this field could further benefit the life sciences community.
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Affiliation(s)
- Shelley D Rawson
- The Henry Royce Institute and School of Materials, The University of Manchester, Manchester, M13 9PL, UK
| | - Jekaterina Maksimcuka
- The Henry Royce Institute and School of Materials, The University of Manchester, Manchester, M13 9PL, UK
| | - Philip J Withers
- The Henry Royce Institute and School of Materials, The University of Manchester, Manchester, M13 9PL, UK
| | - Sarah H Cartmell
- The Henry Royce Institute and School of Materials, The University of Manchester, Manchester, M13 9PL, UK.
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Yuan M, Gao AT, Wang TM, Liang JH, Aihemati GB, Cao Y, Xie X, Miao LY, Lin ZT. Using Meglumine Diatrizoate to improve the accuracy of diagnosis of cracked teeth on Cone-beam CT images. Int Endod J 2020; 53:709-714. [PMID: 31985061 DOI: 10.1111/iej.13270] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 01/21/2020] [Accepted: 01/22/2020] [Indexed: 01/18/2023]
Abstract
AIM To explore in a laboratory setting the feasibility of using Meglumine Diatrizoate (MD) to improve the accuracy of diagnosis of cracked teeth on cone-beam CT (CBCT) images. METHODOLOGY Twenty-four teeth were cracked artificially by soaking them cyclically in liquid nitrogen and hot water. The number and position of crack lines were evaluated with a dental operating microscope and used as the gold standard. The artificially cracked teeth were then examined using routine scanning (RS) and enhanced scanning (ES) modes, respectively. For the ES mode, MD was painted on the surface of the crack lines, and then, CBCT scanning with the same parameters was performed after 10 min. A radiological graduate student and an experienced radiologist evaluated the presence or absence of crack lines, respectively. The differences between the RS and ES modes were determined and assessed using McNemar's test. Inter-examiner agreement and intra-examiner agreement were assessed using kappa analysis. RESULTS Fifty-seven crack lines were found in the 24 cracked teeth. In the RS mode, the accuracy of detection of crack lines was 23% (radiological graduate student) and 32% (experienced radiologist), whereas in the ES mode, the accuracy was 61% (radiological graduate student) and 65% (experienced radiologist). The inter-examiner agreement was 0.693 in RS mode and 0.849 in ES mode. The intra-examiner agreement was 0.872 and 0.949 for the radiological graduate student in RS and ES mode respectively; and one for the experienced radiologist both in RS and ES mode. CONCLUSIONS Compared with routine scanning mode, more crack lines could be detected in enhanced scanning mode using Meglumine Diatrizoate as a contrast medium. MD could be a potential contrast medium to improve the accuracy of detection of crack lines on CBCT images.
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Affiliation(s)
- M Yuan
- Department of Dentomaxillofacial Radiology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
| | - A T Gao
- Department of Dentomaxillofacial Radiology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
| | - T M Wang
- Department of Dentomaxillofacial Radiology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
| | - J H Liang
- Department of Dentomaxillofacial Radiology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
| | - G B Aihemati
- Department of Dentomaxillofacial Radiology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
| | - Y Cao
- Department of Dentomaxillofacial Radiology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
| | - X Xie
- Department of Stomatology, Third People's Hospital of Danyang City, Danyang, China
| | - L Y Miao
- Department of Endodontics, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
| | - Z T Lin
- Department of Dentomaxillofacial Radiology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
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