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Lo LM, Raghunath M, Lee KKH. Growing Human Dermal Fibroblasts as Spheroids Renders Them Susceptible for Early Expression of Pluripotency Genes. ACTA ACUST UNITED AC 2019; 3:e1900094. [DOI: 10.1002/adbi.201900094] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 07/26/2019] [Indexed: 12/12/2022]
Affiliation(s)
- Lok Man Lo
- MOE Key Laboratory for Regenerative MedicineSchool of Biomedical SciencesChinese University of Hong Kong
- Joint Chinese University of Hong Kong – University of Southampton Laboratory for Stem Cell and Regenerative MedicineSchool of Biomedical SciencesChinese University of Hong Kong
| | - Michael Raghunath
- Center for Cell Biology and Tissue EngineeringInstitute for Chemistry and BiotechnologyZurich University for Applied Sciences (ZHAW) Switzerland
| | - Kenneth K. H. Lee
- MOE Key Laboratory for Regenerative MedicineSchool of Biomedical SciencesChinese University of Hong Kong
- Joint Chinese University of Hong Kong – University of Southampton Laboratory for Stem Cell and Regenerative MedicineSchool of Biomedical SciencesChinese University of Hong Kong
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A scaffold-free in vitro model for osteogenesis of human mesenchymal stem cells. Tissue Cell 2011; 43:91-100. [PMID: 21329953 DOI: 10.1016/j.tice.2010.12.004] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2010] [Revised: 12/21/2010] [Accepted: 12/27/2010] [Indexed: 11/21/2022]
Abstract
For studying cellular processes three-dimensional (3D) in vitro models are of a high importance. For tissue engineering approaches osseous differentiation is performed on 3D scaffolds, but material depending influences promote cellular processes like adhesion, proliferation and differentiation. To investigate developmental processes of mesenchymal stem cells without cell-substrate interactions, self-contained in vitro models mimicking physiological condition are required. However, with respect to scientific investigations and pharmaceutical tests, it is essential that these tissue models are well characterised and are of a high reproducibility. In order to establish an appropriate in vitro model for bone formation, different protocols are compared and optimised regarding their aggregate formation efficiency, homogeneity of the aggregates, the viability and their ability to induce differentiation into the osteogenic lineage. The protocols for the generation of 3D cell models are based on rotation culture, hanging drop technique, and the cultivation in non adhesive culture vessels (single vessels as well as 96 well plates). To conclude, the cultivation of hMSCs in 96 well non adhesive plates facilitates an easy way to cultivate homogenous cellular aggregates with high performance efficiency in parallel. The size can be controlled by the initial cell density per well and within this spheroids, bone formation has been induced.
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Emfietzoglou D, Kostarelos K, Hadjidoukas P, Bousis C, Fotopoulos A, Pathak A, Nikjoo H. Subcellular S-factors for low-energy electrons: A comparison of Monte Carlo simulations and continuous-slowing-down calculations. Int J Radiat Biol 2009; 84:1034-44. [DOI: 10.1080/09553000802460180] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Emrich JG, Vender JR. Radioimmunotherapy in the treatment of malignant astrocytomas. Drug Deliv 2008. [DOI: 10.3109/10717549609031178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Dadachova E, Patel MC, Toussi S, Apostolidis C, Morgenstern A, Brechbiel MW, Gorny MK, Zolla-Pazner S, Casadevall A, Goldstein H. Targeted killing of virally infected cells by radiolabeled antibodies to viral proteins. PLoS Med 2006; 3:e427. [PMID: 17090209 PMCID: PMC1630718 DOI: 10.1371/journal.pmed.0030427] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2006] [Accepted: 08/22/2006] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND The HIV epidemic is a major threat to health in the developing and western worlds. A modality that targets and kills HIV-1-infected cells could have a major impact on the treatment of acute exposure and the elimination of persistent reservoirs of infected cells. The aim of this proof-of-principle study was to demonstrate the efficacy of a therapeutic strategy of targeting and eliminating HIV-1-infected cells with radiolabeled antibodies specific to viral proteins in vitro and in vivo. METHODS AND FINDINGS Antibodies to HIV-1 envelope glycoproteins gp120 and gp41 labeled with radioisotopes bismuth 213 ((213)Bi) and rhenium 188 ((188)Re) selectively killed chronically HIV-1-infected human T cells and acutely HIV-1-infected human peripheral blood mononuclear cells (hPBMCs) in vitro. Treatment of severe combined immunodeficiency (SCID) mice harboring HIV-1-infected hPBMCs in their spleens with a (213)Bi- or (188)Re-labeled monoclonal antibody (mAb) to gp41 resulted in a 57% injected dose per gram uptake of radiolabeled mAb in the infected spleens and in a greater than 99% elimination of HIV-1-infected cells in a dose-dependent manner. The number of HIV-1-infected thymocytes decreased 2.5-fold in the human thymic implant grafts of SCID mice treated with the (188)Re-labeled antibody to gp41 compared with those treated with the (188)Re-control mAb. The treatment did not cause acute hematologic toxicity in the treated mice. CONCLUSIONS The current study demonstrates the effectiveness of HIV-targeted radioimmunotherapy and may provide a novel treatment option in combination with highly active antiretroviral therapy for the eradication of HIV.
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Affiliation(s)
- Ekaterina Dadachova
- Albert Einstein College of Medicine, Bronx, New York, United States of America.
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Dadachova E, Casadevall A. Antibodies as delivery vehicles for radioimmunotherapy of infectious diseases. Expert Opin Drug Deliv 2006; 2:1075-84. [PMID: 16296810 DOI: 10.1517/17425247.2.6.1075] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The field of infectious diseases is in crisis and there is a need for strategies that can facilitate the rapid development of new antimicrobial agents. Radioimmunotherapy (RIT), a therapeutic modality originally developed for cancer treatment, has recently been suggested as a novel therapy for the treatment of a variety of infectious diseases. Because specific antibodies are used in RIT as delivery vehicles of cytocidal radiation, their molecular weight influences the nonspecific accumulation in infectious foci and blood clearance, and their affinity-specific accumulation of antibodies in infectious foci. Like the problems encountered in oncology, relevant variables in the development of RIT of infectious diseases include target antigen-shedding; delivering radionuclides to infectious foci in organs, abscesses, granulomas, heart and brain, and potential safety concerns. Dadachova and Casadevall anticipate that RIT can be developed for many types of infectious diseases, including microbes resistant to conventional antimicrobial therapy and agents of biological warfare.
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Affiliation(s)
- Ekaterina Dadachova
- Department of Nuclear Medicine, Albert Einstein College of Medicine of Yeshiva University, Bronx, NY 10461, USA.
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Abstract
Three-dimensional (3D) tissue culture models have an invaluable role in tumour biology today providing some very important insights into cancer biology. As well as increasing our understanding of homeostasis, cellular differentiation and tissue organization they provide a well defined environment for cancer research in contrast to the complex host environment of an in vivo model. Due to their enormous potential 3D tumour cultures are currently being exploited by many branches of biomedical science with therapeutically orientated studies becoming the major focus of research. Recent advances in 3D culture and tissue engineering techniques have enabled the development of more complex heterologous 3D tumour models.
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Affiliation(s)
- Jong Bin Kim
- Ludwig Institute for Cancer Research, First Floor - Breast Cancer Laboratory, Department of Surgery, Royal Free and University College London Medical School, Charles Bell House, 67-73 Riding House Street, London W1W 7EJ, UK.
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8
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McCready VR, O'Sullivan JM. Future directions for unsealed source radionuclide therapy for bone metastases. Eur J Nucl Med Mol Imaging 2002; 29:1271-5. [PMID: 12271406 DOI: 10.1007/s00259-002-0914-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
Biotechnology demands powerful methods for the functional characterisation and monitoring of molecular alterations in tissues in response to various stimuli. Currently, cellular biosensors provide information about cell and tissue internal transduction pathways. In this article, recent biosensor systems are briefly described and the use of 3D tissue aggregates as recognition elements is discussed. An example of an innovative approach for drug testing using 3D heart muscle aggregates, as well as tumor models, positioned in capillary systems for electrical potential recording and impedance measurement is described. The effectiveness of drugs and therapies can be tested and monitored in a short time using such biohybrid sensors.
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Affiliation(s)
- Alexandra Reininger-Mack
- Fraunhofer Institute for Biomedical Engineering (FhG-IBMT), Department of Biohybrid Systems, Ensheimer Str. 48, 66386 St Ingbert/Saar, Germany
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Abstract
A variety of radionuclides continue to be investigated and/or clinically used for different therapeutic applications in nuclear medicine. The choice of a particular radionuclide with regard to appropriate emissions, linear energy transfer, and physical half-life is dictated to a large extent by the character of the disease (eg, solid tumor or metastatic disease) and by the carrier used to selectively transport the radionuclide to the desired site. An impressive body of information has appeared in the recent literature that addresses many of these considerations. This article summarizes and discusses the many recent advances and the progress in the clinical applications of therapeutic radionuclides in relatively new and developing areas, such as radioimmunotherapy, peptide therapy, intravascular therapy to prevent restenosis, radiation synovectomy, and bone malignancy therapy. Projections are made as to the future directions and progress in these areas. The crucial issue of a reliable, year-round supply of new and emerging therapeutic radionuclides in quantities sufficient initially for research, and then for routine clinical use, is a very worthy goal which, in the United States, remains to be achieved.
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Affiliation(s)
- S Srivastava
- Brookhaven National Laboratory, Medical Department, Upton, NY 11973-5000, USA
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11
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Abstract
Recent research using multicellular tumor spheroids has resulted in new insights in the regulation of invasion and metastasis, angiogenesis and cell cycle kinetics. The onset and expansion of central necrosis in tumor spheroids has been characterized to be a complex interaction of several mechanisms; in a number of cases, necrosis is not a consequence of hypoxia or anoxia, but emerges as secondary necrosis following an accumulation of apoptosis in spheroids. Recent therapeutically oriented studies have been directed towards novel hypoxic markers, targeted therapy, multicellular-mediated drug resistance, and heavy ion irradiation of spheroids. Research efforts should be enhanced mainly in the fields of tumor tissue modeling by heterotypic three-dimensional (3D) cultures and of apoptotic versus necrotic cell death. Based on the fundamental differences between monolayer and 3D cultures, spheroids should become mandatory test systems in therapeutic screening programs.
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Affiliation(s)
- W Mueller-Klieser
- Institute of Physiology and Pathophysiology, Johannes Gutenberg-University Mainz, Duesbergweg 6, 55099, Mainz, Germany.
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12
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Abstract
Recent advances in biotechnology have allowed the production of new types of macromolecular therapeutic agents (antibodies, immunotoxins, cytokines, extracellular matrix molecule (ECM) proteins, vectors) that may eventually find broad clinical applications in the treatment of human tumors and other diseases. The model of the Multicellular Tumor Spheroids (MTS) represents a valuable tool to test the therapeutic potential of these new pharmacologic agents in a 3-D context. Specific questions pertaining to the behaviour in a 3-D setting of some of the macromolecules under evaluation for in vivo applications can also be addressed in the MTS model (e.g. 'binding site barrier', role of cell-cell and cell-ECM interactions). This paper reviews the most significant contributions regarding the delivery of macromolecules to MTS, the penetration and therapeutic effects of antibodies, radiolabelled antibodies, immunotoxins and other macromolecular compounds.
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Affiliation(s)
- G Fracasso
- Department of Pathology, Section of Immunology, University of Verona, c/o Policlinico Borgo Roma, I-37134, Verona, Italy
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Sawyer EJ, Cassoni AM, Waddington W, Bomanji JB, Briggs TW. Rhenium-186 HEDP as a boost to external beam irradiation in osteosarcoma. Br J Radiol 1999; 72:1225-9. [PMID: 10703485 DOI: 10.1259/bjr.72.864.10703485] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
In this case report we demonstrate the usefulness of targeted radiotherapy in the form of rhenium-186 HEDP as a method for dose escalation in the treatment of osteosarcoma.
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Affiliation(s)
- E J Sawyer
- Meyerstein Institute of Oncology, Middlesex Hospital, London, UK
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Heeg MJ, Jurisson SS. The Role of Inorganic Chemistry in the Development of Radiometal Agents for Cancer Therapy. Acc Chem Res 1999. [DOI: 10.1021/ar980002c] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mary Jane Heeg
- Departments of Chemistry, Wayne State University, Detroit, Michigan 48202, and University of Missouri, Columbia, Missouri 65211
| | - Silvia S. Jurisson
- Departments of Chemistry, Wayne State University, Detroit, Michigan 48202, and University of Missouri, Columbia, Missouri 65211
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Kunz-Schughart LA, Kreutz M, Knuechel R. Multicellular spheroids: a three-dimensional in vitro culture system to study tumour biology. Int J Exp Pathol 1998; 79:1-23. [PMID: 9614346 PMCID: PMC3219428 DOI: 10.1046/j.1365-2613.1998.00051.x] [Citation(s) in RCA: 229] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
The growth of tumour cells as three-dimensional multicellular spheroids in vitro has led to important insights in tumour biology, since properties of the in vivo-tumour such as proliferation or nutrient gradients, can be studied under controlled conditions. While this review starts with an update of recent data on spheroid monocultures, especially concerning tumour microenvironment and therapeutic modalities, the main emphasis is put on the spectrum of heterologous cultures which have evolved in previous years. This type of culture includes tumour cell interaction with endothelial, fibroblast or immunocompetent cells. The relation of the spheroid culture model to other types of three-dimensional culture and our critical evaluation and presentation of the technical aspects of growing and analysing spheroids are included in the text. These topics are chosen to help the experimental pathologist design experiments with tumour spheroids and to stimulate discussion.
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Mueller-Klieser W. Three-dimensional cell cultures: from molecular mechanisms to clinical applications. THE AMERICAN JOURNAL OF PHYSIOLOGY 1997; 273:C1109-23. [PMID: 9357753 DOI: 10.1152/ajpcell.1997.273.4.c1109] [Citation(s) in RCA: 422] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
This article reviews actual advances in the development and application of three-dimensional (3-D) cell culture systems. Recent therapeutically oriented studies include characterization of multicellular-mediated drug resistance, novel ways of quantifying hypoxia, and new approaches to more efficient immunotherapy. Recent progress toward understanding the development of necrosis in tumor spheroids has been made using novel spheroid models. 3-D cultures have been used for studies on molecular mechanisms involved in invasion and metastasis, with a major focus on the role of E-cadherin. Similarly, tumor angiogenesis and the significance of vascular endothelial growth factor have been investigated in a variety of 3-D culture systems. There are many ongoing developments in tissue modeling or remodeling that promise significant progress toward the development of bioartificial liver support and artificial blood. Perhaps one of the most interesting areas of basic research with 3-D cultures is the characterization of embryoid bodies obtained from stable embryonic stem cells. These models have greatly increased the understanding of embryonic development, in particular through the notable exceptional advances in cardiogenesis.
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Affiliation(s)
- W Mueller-Klieser
- Institute of Physiology and Pathophysiology, Johannes Gutenberg-University Mainz, Germany
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Abstract
Bone pain is a common symptom in disseminated malignancy and may be difficult to manage effectively. Radiation is of proven benefit for pain palliation and there is growing interest in the therapeutic potential of bone-seeking radiopharmaceuticals. Clinical data relating to the use of phosphorus-32, strontium-89, samarium-153 EDTMP, rhenium-186 HEDP and tin-117m DTPA are reviewed in the context of the pathophysiology of metastatic bone pain. Possible mechanisms of action of palliative radiotherapy and, in particular, the theoretical role of early response genes are discussed. The application of Monte Carlo simulation to targeted radiotherapy for bone metastases may provide the basis for a clearer understanding of the microdosimetry and radiobiology of bone pain palliation and for reliable prediction of clinical response and toxicity.
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Abstract
Radionuclide decay by electron capture and/or internal conversion is accompanied by complex atomic vacancy cascades and emission of low-energy electrons, resulting in a highly charged daughter atom and a high density of electron irradiation in the immediate vicinity of the decay site. The molecular and cellular consequences of such decay events include DNA strand breaks, mutations, chromosome aberrations, malignant transformation, division delay, and cell death. Damage to cells depends largely on the intracellular location of the radionuclide. Decays outside the cell nucleus produce low-LET-type radiation effects (RBE approximately 1). In contrast, decays in DNA cause pronounced high-LET-type effects (RBE approximately 7-9). However, recent studies suggest that even for DNA-associated Auger emitters cell damage can be modified to resemble the pattern observed with low-LET radiations. These findings indicate that the molecular and cellular mechanism(s) responsible for the cytotoxic effects of Auger emitters remain obscure.
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Affiliation(s)
- K G Hofer
- Institute of Molecular Biophysics, Florida State University, Tallahassee 32306, USA
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