551
|
Formation of multicellular tumor spheroids induced by cyclic RGD-peptides and use for anticancer drug testing in vitro. Int J Pharm 2016; 506:148-57. [DOI: 10.1016/j.ijpharm.2016.04.005] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Revised: 03/11/2016] [Accepted: 04/01/2016] [Indexed: 11/22/2022]
|
552
|
Leong W, Kremer A, Wang DA. Development of size-customized hepatocarcinoma spheroids as a potential drug testing platform using a sacrificial gelatin microsphere system. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 63:644-9. [DOI: 10.1016/j.msec.2016.03.046] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2015] [Revised: 01/29/2016] [Accepted: 03/14/2016] [Indexed: 01/09/2023]
|
553
|
Nguyen HTL, Nguyen ST, Van Pham P. Concise Review: 3D cell culture systems for anticancer drug screening. BIOMEDICAL RESEARCH AND THERAPY 2016. [DOI: 10.7603/s40730-016-0022-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
554
|
Ham SL, Joshi R, Thakuri PS, Tavana H. Liquid-based three-dimensional tumor models for cancer research and drug discovery. Exp Biol Med (Maywood) 2016; 241:939-54. [PMID: 27072562 PMCID: PMC4950350 DOI: 10.1177/1535370216643772] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Tumors are three-dimensional tissues where close contacts between cancer cells, intercellular interactions between cancer and stromal cells, adhesion of cancer cells to the extracellular matrix, and signaling of soluble factors modulate functions of cancer cells and their response to therapeutics. Three-dimensional cultures of cancer cells overcome limitations of traditionally used monolayer cultures and recreate essential characteristics of tumors such as spatial gradients of oxygen, growth factors, and metabolites and presence of necrotic, hypoxic, quiescent, and proliferative cells. As such, three-dimensional tumor models provide a valuable tool for cancer research and oncology drug discovery. Here, we describe different tumor models and primarily focus on a model known as tumor spheroid. We summarize different technologies of spheroid formation, and discuss the use of spheroids to address the influence of stromal fibroblasts and immune cells on cancer cells in tumor microenvironment, study cancer stem cells, and facilitate compound screening in the drug discovery process. We review major techniques for quantification of cellular responses to drugs and discuss challenges ahead to enable broad utility of tumor spheroids in research laboratories, integrate spheroid models into drug development and discovery pipeline, and use primary tumor cells for drug screening studies to realize personalized cancer treatment.
Collapse
Affiliation(s)
- Stephanie L Ham
- Department of Biomedical Engineering, The University of Akron, Akron, OH 44325, USA
| | - Ramila Joshi
- Department of Biomedical Engineering, The University of Akron, Akron, OH 44325, USA
| | - Pradip S Thakuri
- Department of Biomedical Engineering, The University of Akron, Akron, OH 44325, USA
| | - Hossein Tavana
- Department of Biomedical Engineering, The University of Akron, Akron, OH 44325, USA
| |
Collapse
|
555
|
Anti-gastric cancer activity in three-dimensional tumor spheroids of bufadienolides. Sci Rep 2016; 6:24772. [PMID: 27098119 PMCID: PMC4838868 DOI: 10.1038/srep24772] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 03/29/2016] [Indexed: 12/12/2022] Open
Abstract
Multicellular spheroids of cancer cells have been increasingly used to screen anti-tumor compounds, owing to their in vivo like microenvironment and structure as well as compatibility to high-throughput/high-content screening. Here we report the potency and efficacy of a family of bufadienolides to inhibit the growth of gastric cancer cell line HGC-27 in three-dimensional (3D) spheroidal models. Examining the morphological and growth patterns of several cell lines in round-bottomed ultra-low attachment microplate suggested that HGC-27 cells formed reproducibly multicellular spheroidal structures. Profiling of 15 natural bufadienolides isolated from toad skin indicated that 8 14-hydroxy bufadienolides displayed inhibitory activity of the growth of HGC-27 spheroids in a dose-dependent manner. Notably, compared to clinical drugs taxol and epirubicin, active bufadienolides were found to penetrate more effectively into the HGC-27 spheroids, but with a narrower effective concentration range and a shorter lasting inhibitory effect. Furthermore, compared to two-dimensional (2D) cell monolayer assays, active bufadienolides exhibited weaker efficacy and different potency in 3D spheroid model, demonstrating the great potential of 3D multicellular cell spheroid models in anti-cancer drug discovery and development.
Collapse
|
556
|
Simultaneous blocking of IL-6 and IL-8 is sufficient to fully inhibit CAF-induced human melanoma cell invasiveness. Histochem Cell Biol 2016; 146:205-17. [PMID: 27102177 DOI: 10.1007/s00418-016-1433-8] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/07/2016] [Indexed: 12/25/2022]
Abstract
Tumour microenvironment plays a critical role in cell invasion and metastasis. To investigate the role of cancer-associated fibroblasts (CAFs) in melanoma cell invasiveness, we used 3D spheroid invasion assay. The effect of conditioned media from normal fibroblasts and CAFs cultivated alone or co-cultivated with melanoma cells on BLM or A2058 melanoma spheroid invasion was analysed. We found that conditioned media from CAFs and CAFs co-cultured with melanoma cells, especially, promote invasion and migration, without significant effect on melanoma cell proliferation. We further analysed the expression of pro-invasive cytokines IL-8 and IL-6 in media and found that melanoma cells are dominant producers of IL-8 and fibroblasts are dominant producers of IL-6 in 2D monocultures, while co-cultivation of CAFs with melanoma cells induces production/secretion of IL-6 and IL-8 into the media. The analyses of IL-6 levels in 3D cultures and human melanoma samples, however, revealed that at least in some cases IL-6 is also produced directly by melanoma cells. Analysis of the role of IL-6 and IL-8 in CAF-induced melanoma invasion, using neutralising antibodies, revealed that simultaneous blocking of IL-6 and IL-8 is sufficient to fully inhibit CAF-induced human melanoma cell invasiveness. In summary, these experiments indicate the important role of CAFs and IL-8 and IL-6 cytokines in melanoma cell invasiveness.
Collapse
|
557
|
Grimes DR, Kannan P, McIntyre A, Kavanagh A, Siddiky A, Wigfield S, Harris A, Partridge M. The Role of Oxygen in Avascular Tumor Growth. PLoS One 2016; 11:e0153692. [PMID: 27088720 PMCID: PMC4835055 DOI: 10.1371/journal.pone.0153692] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Accepted: 04/03/2016] [Indexed: 12/11/2022] Open
Abstract
The oxygen status of a tumor has significant clinical implications for treatment prognosis, with well-oxygenated subvolumes responding markedly better to radiotherapy than poorly supplied regions. Oxygen is essential for tumor growth, yet estimation of local oxygen distribution can be difficult to ascertain in situ, due to chaotic patterns of vasculature. It is possible to avoid this confounding influence by using avascular tumor models, such as tumor spheroids, a much better approximation of realistic tumor dynamics than monolayers, where oxygen supply can be described by diffusion alone. Similar to in situ tumours, spheroids exhibit an approximately sigmoidal growth curve, often approximated and fitted by logistic and Gompertzian sigmoid functions. These describe the basic rate of growth well, but do not offer an explicitly mechanistic explanation. This work examines the oxygen dynamics of spheroids and demonstrates that this growth can be derived mechanistically with cellular doubling time and oxygen consumption rate (OCR) being key parameters. The model is fitted to growth curves for a range of cell lines and derived values of OCR are validated using clinical measurement. Finally, we illustrate how changes in OCR due to gemcitabine treatment can be directly inferred using this model.
Collapse
Affiliation(s)
- David Robert Grimes
- Cancer Research UK/MRC Oxford Institute for Radiation Oncology, Gray Laboratories, University of Oxford, Old Road Campus, Oxford, OX3 7DQ, United Kingdom
| | - Pavitra Kannan
- Cancer Research UK/MRC Oxford Institute for Radiation Oncology, Gray Laboratories, University of Oxford, Old Road Campus, Oxford, OX3 7DQ, United Kingdom
| | - Alan McIntyre
- The Weatherall Institute for Molecular Medicine, University of Oxford, John Radcliffe Hospital/Headley Way, Oxford, OX3 9DS, United Kingdom
| | - Anthony Kavanagh
- Advanced Technology Development Group, Department of Oncology, University of Oxford, Old Road Campus Research Building, Oxford, OX3 7DQ, United Kingdom
| | - Abul Siddiky
- Cancer Research UK/MRC Oxford Institute for Radiation Oncology, Gray Laboratories, University of Oxford, Old Road Campus, Oxford, OX3 7DQ, United Kingdom
| | - Simon Wigfield
- The Weatherall Institute for Molecular Medicine, University of Oxford, John Radcliffe Hospital/Headley Way, Oxford, OX3 9DS, United Kingdom
| | - Adrian Harris
- The Weatherall Institute for Molecular Medicine, University of Oxford, John Radcliffe Hospital/Headley Way, Oxford, OX3 9DS, United Kingdom
| | - Mike Partridge
- Cancer Research UK/MRC Oxford Institute for Radiation Oncology, Gray Laboratories, University of Oxford, Old Road Campus, Oxford, OX3 7DQ, United Kingdom
| |
Collapse
|
558
|
Nath S, Devi GR. Three-dimensional culture systems in cancer research: Focus on tumor spheroid model. Pharmacol Ther 2016; 163:94-108. [PMID: 27063403 DOI: 10.1016/j.pharmthera.2016.03.013] [Citation(s) in RCA: 554] [Impact Index Per Article: 69.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Cancer cells propagated in three-dimensional (3D) culture systems exhibit physiologically relevant cell-cell and cell-matrix interactions, gene expression and signaling pathway profiles, heterogeneity and structural complexity that reflect in vivo tumors. In recent years, development of various 3D models has improved the study of host-tumor interaction and use of high-throughput screening platforms for anti-cancer drug discovery and development. This review attempts to summarize the various 3D culture systems, with an emphasis on the most well characterized and widely applied model - multicellular tumor spheroids. This review also highlights the various techniques to generate tumor spheroids, methods to characterize them, and its applicability in cancer research.
Collapse
Affiliation(s)
- Sritama Nath
- Division of Surgical Sciences, Department of Surgery, Duke University School of Medicine, Durham, NC 27710, United States
| | - Gayathri R Devi
- Division of Surgical Sciences, Department of Surgery, Duke University School of Medicine, Durham, NC 27710, United States; Duke Cancer Institute, Women's Cancer Program, Duke University School of Medicine, Durham, NC 27710, United States.
| |
Collapse
|
559
|
Bellotti C, Duchi S, Bevilacqua A, Lucarelli E, Piccinini F. Long term morphological characterization of mesenchymal stromal cells 3D spheroids built with a rapid method based on entry-level equipment. Cytotechnology 2016; 68:2479-2490. [PMID: 27023795 DOI: 10.1007/s10616-016-9969-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Accepted: 03/22/2016] [Indexed: 11/25/2022] Open
Abstract
Three-dimensional (3D) spheroids of mesenchymal stromal cells (MSC) have been demonstrated to improve a wide range of MSC features, such as multilineage potential, secretion of therapeutic factors, and resistance against hypoxic condition. Accordingly, they represent a promising tool in regenerative medicine for several biological and clinical applications. Many approaches have been proposed to generate MSC spheroids. They usually require specific generation systems, such as rotatory bioreactors or low-attachment plates, and each approach has its own disadvantages. Furthermore, an over-time analysis of morphological homogeneity and architectural stability of the spheroids generated is rarely provided. In this work we adapted the "pellet culture" method to obtain homogenous spheroids of MSC and maintain them in vitro for long term studies. We analysed their outer and inner structure over a 2-month period to provide morphological and architectural information regarding the spheroids generated. Quantitative and qualitative data were obtained using brightfield and confocal microscope imaging coupled to a computational analysis to estimate volume, sphericity, and jagging degree. In addition, histological evaluation was performed to more thoroughly assess the cellular composition and the internal architecture of the 3D spheroids. The results provided show that MSC spheroids generated with the proposed approach are homogeneous and stable, from both morphological and architectural points of view, for a period of at least 15 days, approximately between day 15 and day 30 after their generation. Accordingly, the approach proposed serves as a rapid, cost-effective, and efficient method to generate and maintain MSC spheroids using common entry-level laboratory equipment only.
Collapse
Affiliation(s)
- Chiara Bellotti
- Osteoarticular Regeneration Laboratory, Rizzoli Orthopedic Institute, Bologna, Italy.,Department of Biomedical and Neuromotor Sciences (DIBINEM), University of Bologna, Bologna, Italy
| | - Serena Duchi
- Osteoarticular Regeneration Laboratory, Rizzoli Orthopedic Institute, Bologna, Italy.,Department of Biomedical and Neuromotor Sciences (DIBINEM), University of Bologna, Bologna, Italy
| | - Alessandro Bevilacqua
- Advanced Research Center on Electronic Systems for Information and Communication Technologies "E. De Castro" (ARCES), University of Bologna, Via Toffano 2/2, 40125, Bologna, Italy.,Department of Computer Science and Engineering (DISI), University of Bologna, Bologna, Italy
| | - Enrico Lucarelli
- Osteoarticular Regeneration Laboratory, Rizzoli Orthopedic Institute, Bologna, Italy
| | - Filippo Piccinini
- Advanced Research Center on Electronic Systems for Information and Communication Technologies "E. De Castro" (ARCES), University of Bologna, Via Toffano 2/2, 40125, Bologna, Italy.
| |
Collapse
|
560
|
Sucre JMS, Wilkinson D, Vijayaraj P, Paul M, Dunn B, Alva-Ornelas JA, Gomperts BN. A three-dimensional human model of the fibroblast activation that accompanies bronchopulmonary dysplasia identifies Notch-mediated pathophysiology. Am J Physiol Lung Cell Mol Physiol 2016; 310:L889-98. [PMID: 26968771 DOI: 10.1152/ajplung.00446.2015] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 03/07/2016] [Indexed: 12/13/2022] Open
Abstract
Bronchopulmonary dysplasia (BPD) is a leading complication of premature birth and occurs primarily in infants delivered during the saccular stage of lung development. Histopathology shows decreased alveolarization and a pattern of fibroblast proliferation and differentiation to the myofibroblast phenotype. Little is known about the molecular pathways and cellular mechanisms that define BPD pathophysiology and progression. We have developed a novel three-dimensional human model of the fibroblast activation associated with BPD, and using this model we have identified the Notch pathway as a key driver of fibroblast activation and proliferation in response to changes in oxygen. Fetal lung fibroblasts were cultured on sodium alginate beads to generate lung organoids. After exposure to alternating hypoxia and hyperoxia, the organoids developed a phenotypic response characterized by increased α-smooth muscle actin (α-SMA) expression and other genes known to be upregulated in BPD and also demonstrated increased expression of downstream effectors of the Notch pathway. Inhibition of Notch with a γ-secretase inhibitor prevented the development of the pattern of cellular proliferation and α-SMA expression in our model. Analysis of human autopsy tissue from the lungs of infants who expired with BPD demonstrated evidence of Notch activation within fibrotic areas of the alveolar septae, suggesting that Notch may be a key driver of BPD pathophysiology.
Collapse
Affiliation(s)
- Jennifer M S Sucre
- UCLA Children's Discovery and Innovation Institute, Mattel Children's Hospital UCLA, Department of Pediatrics, David Geffen School of Medicine, UCLA, Los Angeles, California
| | - Dan Wilkinson
- UCLA Department of Materials Science and Engineering, UCLA, Los Angeles, California
| | - Preethi Vijayaraj
- UCLA Children's Discovery and Innovation Institute, Mattel Children's Hospital UCLA, Department of Pediatrics, David Geffen School of Medicine, UCLA, Los Angeles, California; Jonsson Comprehensive Cancer Center, UCLA, Los Angeles, California; and
| | - Manash Paul
- UCLA Children's Discovery and Innovation Institute, Mattel Children's Hospital UCLA, Department of Pediatrics, David Geffen School of Medicine, UCLA, Los Angeles, California
| | - Bruce Dunn
- UCLA Department of Materials Science and Engineering, UCLA, Los Angeles, California
| | - Jackelyn A Alva-Ornelas
- UCLA Children's Discovery and Innovation Institute, Mattel Children's Hospital UCLA, Department of Pediatrics, David Geffen School of Medicine, UCLA, Los Angeles, California
| | - Brigitte N Gomperts
- UCLA Children's Discovery and Innovation Institute, Mattel Children's Hospital UCLA, Department of Pediatrics, David Geffen School of Medicine, UCLA, Los Angeles, California; Pulmonary Medicine, David Geffen School of Medicine, UCLA, Los Angeles, California; Jonsson Comprehensive Cancer Center, UCLA, Los Angeles, California; and Eli and Edythe Broad Stem Cell Research Center, UCLA, Los Angeles, California
| |
Collapse
|
561
|
Ware MJ, Colbert K, Keshishian V, Ho J, Corr SJ, Curley SA, Godin B. Generation of Homogenous Three-Dimensional Pancreatic Cancer Cell Spheroids Using an Improved Hanging Drop Technique. Tissue Eng Part C Methods 2016; 22:312-21. [PMID: 26830354 DOI: 10.1089/ten.tec.2015.0280] [Citation(s) in RCA: 110] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
In vitro characterization of tumor cell biology or of potential anticancer drugs is usually performed using tumor cell lines cultured as a monolayer. However, it has been previously shown that three-dimensional (3D) organization of the tumor cells is important to provide insights on tumor biology and transport of therapeutics. Several methods to create 3D tumors in vitro have been proposed, with hanging drop technique being the most simple and, thus, most frequently used. However, in many cell lines this method has failed to form the desired 3D tumor structures. The aim of this study was to design and test an easy-to-use and highly reproducible modification of the hanging drop method for tumor sphere formation by adding methylcellulose polymer. Most pancreatic cancer cells do not form cohesive and manageable spheres when the original hanging drop method is used, thus we investigated these cell lines for our modified hanging drop method. The spheroids produced by this improved technique were analyzed by histology, light microscopy, immunohistochemistry, and scanning electron microscopy. Results show that using the proposed simple method; we were able to produce uniform spheroids for all five of the tested human pancreatic cancer cell lines; Panc-1, BxPC-3, Capan-1, MiaPaCa-2, and AsPC-1. We believe that this method can be used as a reliable and reproducible technique to make 3D cancer spheroids for use in tumor biology research and evaluation of therapeutic responses, and for the development of bio-artificial tissues.
Collapse
Affiliation(s)
- Matthew J Ware
- 1 Department of Nanomedicine, Houston Methodist Research Institute , Houston, Texas.,2 Department of Surgery, Baylor College of Medicine , Houston, Texas
| | - Kevin Colbert
- 1 Department of Nanomedicine, Houston Methodist Research Institute , Houston, Texas
| | - Vazrik Keshishian
- 2 Department of Surgery, Baylor College of Medicine , Houston, Texas
| | - Jason Ho
- 2 Department of Surgery, Baylor College of Medicine , Houston, Texas
| | - Stuart J Corr
- 2 Department of Surgery, Baylor College of Medicine , Houston, Texas
| | - Steven A Curley
- 2 Department of Surgery, Baylor College of Medicine , Houston, Texas
| | - Biana Godin
- 1 Department of Nanomedicine, Houston Methodist Research Institute , Houston, Texas
| |
Collapse
|
562
|
Aftab Q, Sin WC, Naus CC. Reduction in gap junction intercellular communication promotes glioma migration. Oncotarget 2016; 6:11447-64. [PMID: 25926558 PMCID: PMC4484468 DOI: 10.18632/oncotarget.3407] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Accepted: 02/19/2015] [Indexed: 12/28/2022] Open
Abstract
Glioblastoma Multiforme (GBM), an aggressive form of adult brain tumor, is difficult to treat due to its invasive nature. One of the molecular changes observed in GBM is a decrease in the expression of the gap junction protein Connexin43 (Cx43); however, how a reduction in Cx43 expression contributes to glioma malignancy is still unclear. In this study we examine whether a decrease in Cx43 protein expression has a role in enhanced cell migration, a key feature associated with increased tumorigenicity. We used a 3D spheroid migration model that mimics the in vivo architecture of tumor cells to quantify migration changes. We found that down-regulation of Cx43 expression in the U118 human glioma cell line increased migration by reducing cell-ECM adhesion, and changed the migration pattern from collective to single cell. In addition gap junction intercellular communication (GJIC) played a more prominent role in mediating migration than the cytoplasmic interactions of the C-terminal tail. Live imaging revealed that reducing Cx43 expression enhanced relative migration by increasing the cell speed and affecting the direction of migration. Taken together our findings reveal an unexplored role of GJIC in facilitating collective migration.
Collapse
Affiliation(s)
- Qurratulain Aftab
- Department of Cellular & Physiological Sciences, Life Sciences Institute, The University of British Columbia, Vancouver, BC
| | - Wun-Chey Sin
- Department of Cellular & Physiological Sciences, Life Sciences Institute, The University of British Columbia, Vancouver, BC
| | - Christian C Naus
- Department of Cellular & Physiological Sciences, Life Sciences Institute, The University of British Columbia, Vancouver, BC
| |
Collapse
|
563
|
Boo L, Ho WY, Ali NM, Yeap SK, Ky H, Chan KG, Yin WF, Satharasinghe DA, Liew WC, Tan SW, Ong HK, Cheong SK. MiRNA Transcriptome Profiling of Spheroid-Enriched Cells with Cancer Stem Cell Properties in Human Breast MCF-7 Cell Line. Int J Biol Sci 2016; 12:427-45. [PMID: 27019627 PMCID: PMC4807162 DOI: 10.7150/ijbs.12777] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2015] [Accepted: 12/13/2015] [Indexed: 01/06/2023] Open
Abstract
Breast cancer is the second leading cause of cancer-related mortality worldwide as most patients often suffer cancer relapse. The reason is often attributed to the presence of cancer stem cells (CSCs). Recent studies revealed that dysregulation of microRNA (miRNA) are closely linked to breast cancer recurrence and metastasis. However, no specific study has comprehensively characterised the CSC characteristic and miRNA transcriptome in spheroid-enriched breast cells. This study described the generation of spheroid MCF-7 cell in serum-free condition and the comprehensive characterisation for their CSC properties. Subsequently, miRNA expression differences between the spheroid-enriched CSC cells and their parental cells were evaluated using next generation sequencing (NGS). Our results showed that the MCF-7 spheroid cells were enriched with CSCs properties, indicated by the ability to self-renew, increased expression of CSCs markers, and increased resistance to chemotherapeutic drugs. Additionally, spheroid-enriched CSCs possessed greater cell proliferation, migration, invasion, and wound healing ability. A total of 134 significantly (p<0.05) differentially expressed miRNAs were identified between spheroids and parental cells using miRNA-NGS. MiRNA-NGS analysis revealed 25 up-regulated and 109 down-regulated miRNAs which includes some miRNAs previously reported in the regulation of breast CSCs. A number of miRNAs (miR-4492, miR-4532, miR-381, miR-4508, miR-4448, miR-1296, and miR-365a) which have not been previously reported in breast cancer were found to show potential association with breast cancer chemoresistance and self-renewal capability. The gene ontology (GO) analysis showed that the predicted genes were enriched in the regulation of metabolic processes, gene expression, DNA binding, and hormone receptor binding. The corresponding pathway analyses inferred from the GO results were closely related to the function of signalling pathway, self-renewability, chemoresistance, tumorigenesis, cytoskeletal proteins, and metastasis in breast cancer. Based on these results, we proposed that certain miRNAs identified in this study could be used as new potential biomarkers for breast cancer stem cell diagnosis and targeted therapy.
Collapse
Affiliation(s)
- Lily Boo
- 1. Faculty of Medicine and Health Sciences, Universiti Tunku Abdul Rahman, 43000 Cheras, Malaysia
| | - Wan Yong Ho
- 2. Faculty of Medicine and Health Sciences, University of Nottingham (Malaysia Campus), 43500 Semenyih, Malaysia
| | - Norlaily Mohd Ali
- 1. Faculty of Medicine and Health Sciences, Universiti Tunku Abdul Rahman, 43000 Cheras, Malaysia
| | - Swee Keong Yeap
- 3. Institute of Bioscience, Universiti Putra Malaysia, 43400 Serdang, Malaysia
| | - Huynh Ky
- 4. Department of Agriculture Genetics and Breeding, College of Agriculture and Applied Biology, Cantho University, 84071, Vietnam
| | - Kok Gan Chan
- 5. Division of Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Wai Fong Yin
- 5. Division of Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Dilan Amila Satharasinghe
- 3. Institute of Bioscience, Universiti Putra Malaysia, 43400 Serdang, Malaysia.; 6. Faculty of Veterinary Medicine and Animal Science, University of Peradeniya, 20400, Sri Lanka
| | - Woan Charn Liew
- 3. Institute of Bioscience, Universiti Putra Malaysia, 43400 Serdang, Malaysia
| | - Sheau Wei Tan
- 3. Institute of Bioscience, Universiti Putra Malaysia, 43400 Serdang, Malaysia
| | - Han Kiat Ong
- 1. Faculty of Medicine and Health Sciences, Universiti Tunku Abdul Rahman, 43000 Cheras, Malaysia
| | - Soon Keng Cheong
- 1. Faculty of Medicine and Health Sciences, Universiti Tunku Abdul Rahman, 43000 Cheras, Malaysia;; 7. Cryocord Sdn Bhd, Persiaran Cyberpoint Selatan, 63000 Cyberjaya, Malaysia
| |
Collapse
|
564
|
Marcucci F, Stassi G, De Maria R. Epithelial-mesenchymal transition: a new target in anticancer drug discovery. Nat Rev Drug Discov 2016; 15:311-25. [PMID: 26822829 DOI: 10.1038/nrd.2015.13] [Citation(s) in RCA: 255] [Impact Index Per Article: 31.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The conversion of cells with an epithelial phenotype into cells with a mesenchymal phenotype, referred to as epithelial-mesenchymal transition, is a critical process for embryonic development that also occurs in adult life, particularly during tumour progression. Tumour cells undergoing epithelial-mesenchymal transition acquire the capacity to disarm the body's antitumour defences, resist apoptosis and anticancer drugs, disseminate throughout the organism, and act as a reservoir that replenishes and expands the tumour cell population. Epithelial-mesenchymal transition is therefore becoming a target of prime interest for anticancer therapy. Here, we discuss the screening and classification of compounds that affect epithelial-mesenchymal transition, highlight some compounds of particular interest, and address issues related to their clinical application.
Collapse
Affiliation(s)
- Fabrizio Marcucci
- Scientific Directorate, Regina Elena National Cancer Institute, via Elio Chianesi 53, 00144 Rome, Italy. Present address: Department of Pharmacological and Biomolecular Sciences, University of Milan, via Trentacoste 2, 20133 Milan, Italy
| | - Giorgio Stassi
- Department of Surgical and Oncological Sciences, University of Palermo, Via del Vespro 131, 90127 Palermo, Italy
| | - Ruggero De Maria
- Scientific Directorate, Regina Elena National Cancer Institute, via Elio Chianesi 53, 00144 Rome, Italy
| |
Collapse
|
565
|
Doxorubicin-loaded nanoparticles consisted of cationic- and mannose-modified-albumins for dual-targeting in brain tumors. J Control Release 2016; 225:301-13. [PMID: 26826308 DOI: 10.1016/j.jconrel.2016.01.046] [Citation(s) in RCA: 121] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Revised: 12/28/2015] [Accepted: 01/26/2016] [Indexed: 01/26/2023]
Abstract
Albumin nanoparticles have been increasingly viewed as an effective way of delivering chemotherapeutics to solid tumors. Here, we report the one-pot development of a unique prototype of doxorubicin-loaded nanoparticles (NPs) made of naïve albumin (HSA) plus cationic- (c-HSA) or mannose-modified-albumin (m-HSA), with the goal of traversing the blood-brain barrier and targeting brain tumors. c-HSA was synthesized by conjugating ethylenediamine to naïve HSA. Then, m-HSA was derivatized using mannopyranoside via a thiol-maleimide reaction. The c/m-HSA NPs were prepared using a mixture solution of c- and m-HSAs in deionized water and doxorubicin in ethanol/chloroform in the same pot using a high-pressure homogenizer. The c/m-HSA NPs were spherical and well-dispersed, with a particle size of 90.5±3.1nm and zeta-potential of -12.0±0.3mV at c- and m-HSA feed ratios of 5% and 10%, respectively. The c/m-HSA NPs displayed good stability over 3days based on particle size and a linear gradual doxorubicin release over 2days. Specifically, the inhibitory concentration (IC50; 0.5±0.02μg/ml) of c/m-HSA NPs was >2.2-15.6 fold lower than those of doxorubicin or the other HSA NPs. Moreover, among HSA NPs, c/m-HSA NPs exhibited the most prominent performances in transport across the bEnd.3 cell monolayer and uptake in bEnd.3 cells as well as U87MG glioblastoma cells and spheroids. Furthermore, c/m-HSA NPs were localized to a greater extent in brain glioma compared to naïve HSA NPs. Orthotopic glioma-bearing mice treated with c/m-HSA NPs displayed significantly smaller tumors than the mice treated with saline, doxorubicin or HSA NPs. This improved anti-glioma efficacy seemed to be due to the dual-enhanced system of dual cationic absorptive transcytosis and glucose-transport by the combined use of c- and m-HSAs. The c/m-HSA NPs have potential as a novel anti-brain cancer agent with good targetability.
Collapse
|
566
|
Berrondo C, Flax J, Kucherov V, Siebert A, Osinski T, Rosenberg A, Fucile C, Richheimer S, Beckham CJ. Expression of the Long Non-Coding RNA HOTAIR Correlates with Disease Progression in Bladder Cancer and Is Contained in Bladder Cancer Patient Urinary Exosomes. PLoS One 2016; 11:e0147236. [PMID: 26800519 PMCID: PMC4723257 DOI: 10.1371/journal.pone.0147236] [Citation(s) in RCA: 206] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Accepted: 12/30/2015] [Indexed: 12/14/2022] Open
Abstract
Exosomes are 30-150nM membrane-bound secreted vesicles that are readily isolated from biological fluids such as urine (UEs). Exosomes contain proteins, micro RNA (miRNA), messenger RNA (mRNA), and long non-coding RNA (lncRNA) from their cells of origin. Although miRNA, protein and lncRNA have been isolated from serum as potential biomarkers for benign and malignant disease, it is unknown if lncRNAs in UEs from urothelial bladder cancer (UBC) patients can serve as biomarkers. lncRNAs are > 200 nucleotide long transcripts that do not encode protein and play critical roles in tumor biology. As the number of recognized tumor-associated lncRNAs continues to increase, there is a parallel need to include lncRNAs into biomarker discovery and therapeutic target algorithms. The lncRNA HOX transcript antisense RNA (HOTAIR) has been shown to facilitate tumor initiation and progression and is associated with poor prognosis in several cancers. The importance of HOTAIR in cancer biology has sparked interest in using HOTAIR as a biomarker and potential therapeutic target. Here we show HOTAIR and several tumor-associated lncRNAs are enriched in UEs from UBC patients with high-grade muscle-invasive disease (HGMI pT2-pT4). Knockdown of HOTAIR in UBC cell lines reduces in vitro migration and invasion. Importantly, loss of HOTAIR expression in UBC cell lines alters expression of epithelial-to-mesenchyme transition (EMT) genes including SNAI1, TWIST1, ZEB1, ZO1, MMP1 LAMB3, and LAMC2. Finally, we used RNA-sequencing to identify four additional lncRNAs enriched in UBC patient UEs. These data, suggest that UE-derived lncRNA may potentially serve as biomarkers and therapeutic targets.
Collapse
Affiliation(s)
- Claudia Berrondo
- University of Rochester Department of Urology, Strong Memorial Hospital Rochester, New York, United States of America
| | - Jonathan Flax
- University of Rochester Department of Urology, Strong Memorial Hospital Rochester, New York, United States of America
| | - Victor Kucherov
- University of Rochester School of Medicine and Dentistry, Rochester, New York, United States of America
| | - Aisha Siebert
- University of Rochester School of Medicine and Dentistry, Rochester, New York, United States of America
| | - Thomas Osinski
- University of Rochester School of Medicine and Dentistry, Rochester, New York, United States of America
| | - Alex Rosenberg
- Division of Immunology and Rheumatology, University of Rochester, Strong Memorial Hospital Rochester, New York, United States of America
| | - Christopher Fucile
- Division of Immunology and Rheumatology, University of Rochester, Strong Memorial Hospital Rochester, New York, United States of America
| | - Samuel Richheimer
- University of Rochester Department of Urology, Strong Memorial Hospital Rochester, New York, United States of America
| | - Carla J. Beckham
- University of Rochester Department of Urology, Strong Memorial Hospital Rochester, New York, United States of America
- * E-mail:
| |
Collapse
|
567
|
Berrondo C, Flax J, Kucherov V, Siebert A, Osinski T, Rosenberg A, Fucile C, Richheimer S, Beckham CJ. Expression of the Long Non-Coding RNA HOTAIR Correlates with Disease Progression in Bladder Cancer and Is Contained in Bladder Cancer Patient Urinary Exosomes. PLoS One 2016. [PMID: 26800519 DOI: 10.1371/journal.pone.0147236.ecollection2016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Exosomes are 30-150nM membrane-bound secreted vesicles that are readily isolated from biological fluids such as urine (UEs). Exosomes contain proteins, micro RNA (miRNA), messenger RNA (mRNA), and long non-coding RNA (lncRNA) from their cells of origin. Although miRNA, protein and lncRNA have been isolated from serum as potential biomarkers for benign and malignant disease, it is unknown if lncRNAs in UEs from urothelial bladder cancer (UBC) patients can serve as biomarkers. lncRNAs are > 200 nucleotide long transcripts that do not encode protein and play critical roles in tumor biology. As the number of recognized tumor-associated lncRNAs continues to increase, there is a parallel need to include lncRNAs into biomarker discovery and therapeutic target algorithms. The lncRNA HOX transcript antisense RNA (HOTAIR) has been shown to facilitate tumor initiation and progression and is associated with poor prognosis in several cancers. The importance of HOTAIR in cancer biology has sparked interest in using HOTAIR as a biomarker and potential therapeutic target. Here we show HOTAIR and several tumor-associated lncRNAs are enriched in UEs from UBC patients with high-grade muscle-invasive disease (HGMI pT2-pT4). Knockdown of HOTAIR in UBC cell lines reduces in vitro migration and invasion. Importantly, loss of HOTAIR expression in UBC cell lines alters expression of epithelial-to-mesenchyme transition (EMT) genes including SNAI1, TWIST1, ZEB1, ZO1, MMP1 LAMB3, and LAMC2. Finally, we used RNA-sequencing to identify four additional lncRNAs enriched in UBC patient UEs. These data, suggest that UE-derived lncRNA may potentially serve as biomarkers and therapeutic targets.
Collapse
Affiliation(s)
- Claudia Berrondo
- University of Rochester Department of Urology, Strong Memorial Hospital Rochester, New York, United States of America
| | - Jonathan Flax
- University of Rochester Department of Urology, Strong Memorial Hospital Rochester, New York, United States of America
| | - Victor Kucherov
- University of Rochester School of Medicine and Dentistry, Rochester, New York, United States of America
| | - Aisha Siebert
- University of Rochester School of Medicine and Dentistry, Rochester, New York, United States of America
| | - Thomas Osinski
- University of Rochester School of Medicine and Dentistry, Rochester, New York, United States of America
| | - Alex Rosenberg
- Division of Immunology and Rheumatology, University of Rochester, Strong Memorial Hospital Rochester, New York, United States of America
| | - Christopher Fucile
- Division of Immunology and Rheumatology, University of Rochester, Strong Memorial Hospital Rochester, New York, United States of America
| | - Samuel Richheimer
- University of Rochester Department of Urology, Strong Memorial Hospital Rochester, New York, United States of America
| | - Carla J Beckham
- University of Rochester Department of Urology, Strong Memorial Hospital Rochester, New York, United States of America
| |
Collapse
|
568
|
Schmidt M, Scholz CJ, Polednik C, Roller J. Spheroid-based 3-dimensional culture models: Gene expression and functionality in head and neck cancer. Oncol Rep 2016; 35:2431-40. [PMID: 26797047 DOI: 10.3892/or.2016.4581] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Accepted: 12/05/2015] [Indexed: 11/06/2022] Open
Abstract
In the present study a panel of 12 head and neck cancer (HNSCC) cell lines were tested for spheroid formation. Since the size and morphology of spheroids is dependent on both cell adhesion and proliferation in the 3-dimensional (3D) context, morphology of HNSCC spheroids was related to expression of E-cadherin and the proliferation marker Ki67. In HNSCC cell lines the formation of tight regular spheroids was dependent on distinct E-cadherin expression levels in monolayer cultures, usually resulting in upregulation following aggregation into 3D structures. Cell lines expressing only low levels of E-cadherin in monolayers produced only loose cell clusters, frequently decreasing E-cadherin expression further upon aggregation. In these cell lines no epidermal growth factor receptor (EGFR) upregulation occurred and proliferation generally decreased in spheroids/aggregates independent of E-cadherin expression. In a second approach a global gene expression analysis of the larynx carcinoma cell line HLaC78 monolayer and the corresponding spheroids was performed. A global upregulation of gene expression in HLaC78 spheroids was related to genes involved in cell adhesion, cell junctions and cytochrome P450-mediated metabolism of xenobiotics. Downregulation was associated with genes controlling cell cycle, DNA-replication and DNA mismatch repair. Analyzing the expression of selected genes of each functional group in monolayer and spheroid cultures of all 12 cell lines revealed evidence for common gene expression shifts in genes controlling cell junctions, cell adhesion, cell cycle and DNA replication as well as genes involved in the cytochrome P450-mediated metabolism of xenobiotics.
Collapse
Affiliation(s)
- Marianne Schmidt
- Department of Otorhinolaryngology, University of Würzburg, D-97080 Würzburg, Germany
| | - Claus-Juergen Scholz
- Interdisciplinary Center for Clinical Research, Microarray Core Unit, University of Würzburg, D-97078 Würzburg, Germany
| | - Christine Polednik
- Department of Otorhinolaryngology, University of Würzburg, D-97080 Würzburg, Germany
| | - Jeanette Roller
- Department of Otorhinolaryngology, University of Würzburg, D-97080 Würzburg, Germany
| |
Collapse
|
569
|
Bacci M, Giannoni E, Fearns A, Ribas R, Gao Q, Taddei ML, Pintus G, Dowsett M, Isacke CM, Martin LA, Chiarugi P, Morandi A. miR-155 Drives Metabolic Reprogramming of ER+ Breast Cancer Cells Following Long-Term Estrogen Deprivation and Predicts Clinical Response to Aromatase Inhibitors. Cancer Res 2016; 76:1615-26. [DOI: 10.1158/0008-5472.can-15-2038] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Accepted: 12/28/2015] [Indexed: 11/16/2022]
|
570
|
Falkenberg N, Höfig I, Rosemann M, Szumielewski J, Richter S, Schorpp K, Hadian K, Aubele M, Atkinson MJ, Anastasov N. Three-dimensional microtissues essentially contribute to preclinical validations of therapeutic targets in breast cancer. Cancer Med 2016; 5:703-10. [PMID: 26763588 PMCID: PMC4831289 DOI: 10.1002/cam4.630] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Revised: 11/23/2015] [Accepted: 12/07/2015] [Indexed: 12/20/2022] Open
Abstract
A 3D microtissues using T47D and JIMT‐1 cells were generated to analyze tissue‐like response of breast cancer cells after combined human epidermal growth factor receptor 2 (HER2)‐targeted treatment and radiation. Following lentiviral knockdown of HER2, we compared growth rate alterations using 2D monolayers, 3D microtissues, and mouse xenografts. Additionally, to model combined therapeutic strategies, we treated HER2‐depleted T47D cells and 3D microtissues using trastuzumab (anti‐HER2 antibody) in combination with irradiation. Comparison of HER2 knockdown with corresponding controls revealed growth impairment due to HER2 knockdown in T47D 2D monolayers, 3D microtissues, and xenografts (after 2, 12, and ≥40 days, respectively). In contrast, HER2 knockdown was less effective in inhibiting growth of trastuzumab‐resistant JIMT‐1 cells in vitro and in vivo. Combined administration of trastuzumab and radiation treatment was also analyzed using T47D 3D microtissues. Administration of both, radiation (5 Gy) and trastuzumab, significantly enhanced the growth inhibiting effect in 3D microtissues. To improve the predictive power of potential drugs—as single agents or in combination—here, we show that regarding tumor growth analyses, 3D microtissues are highly comparable to outcomes derived from xenografts. Considering increased limitations for animal experiments on the one hand and strong need of novel drugs on the other hand, it is indispensable to include highly reproducible 3D microtissue platform in preclinical analyses to validate more accurately the capacity of future drug‐combined radiotherapy.
Collapse
Affiliation(s)
- Natalie Falkenberg
- Institute of Pathology, Helmholtz Center Munich, German Research Center for Environmental Health, Ingolstaedter Landstrasse 1, 85764, Neuherberg, Germany
| | - Ines Höfig
- Institute of Radiation Biology, Helmholtz Center Munich, German Research Center for Environmental Health, Ingolstaedter Landstrasse 1, 85764, Neuherberg, Germany
| | - Michael Rosemann
- Institute of Radiation Biology, Helmholtz Center Munich, German Research Center for Environmental Health, Ingolstaedter Landstrasse 1, 85764, Neuherberg, Germany
| | - Justine Szumielewski
- Institute of Pathology, Helmholtz Center Munich, German Research Center for Environmental Health, Ingolstaedter Landstrasse 1, 85764, Neuherberg, Germany
| | - Sabine Richter
- Institute of Radiation Biology, Helmholtz Center Munich, German Research Center for Environmental Health, Ingolstaedter Landstrasse 1, 85764, Neuherberg, Germany
| | - Kenji Schorpp
- Assay Development and Screening Platform, Institute of Molecular Toxicology and Pharmacology, Helmholtz Center Munich, German Research Center for Environmental Health, Ingolstaedter Landstrasse 1, 85764, Neuherberg, Germany
| | - Kamyar Hadian
- Assay Development and Screening Platform, Institute of Molecular Toxicology and Pharmacology, Helmholtz Center Munich, German Research Center for Environmental Health, Ingolstaedter Landstrasse 1, 85764, Neuherberg, Germany
| | - Michaela Aubele
- Institute of Pathology, Helmholtz Center Munich, German Research Center for Environmental Health, Ingolstaedter Landstrasse 1, 85764, Neuherberg, Germany
| | - Michael J Atkinson
- Institute of Radiation Biology, Helmholtz Center Munich, German Research Center for Environmental Health, Ingolstaedter Landstrasse 1, 85764, Neuherberg, Germany.,Radiation Biology, Technical University of Munich, Ismaninger Strasse 22, 81675, Munich, Germany
| | - Nataša Anastasov
- Institute of Radiation Biology, Helmholtz Center Munich, German Research Center for Environmental Health, Ingolstaedter Landstrasse 1, 85764, Neuherberg, Germany
| |
Collapse
|
571
|
3D tumor spheroid models for in vitro therapeutic screening: a systematic approach to enhance the biological relevance of data obtained. Sci Rep 2016; 6:19103. [PMID: 26752500 PMCID: PMC4707510 DOI: 10.1038/srep19103] [Citation(s) in RCA: 682] [Impact Index Per Article: 85.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Accepted: 11/20/2015] [Indexed: 12/20/2022] Open
Abstract
The potential of a spheroid tumor model composed of cells in different proliferative and metabolic states for the development of new anticancer strategies has been amply demonstrated. However, there is little or no information in the literature on the problems of reproducibility of data originating from experiments using 3D models. Our analyses, carried out using a novel open source software capable of performing an automatic image analysis of 3D tumor colonies, showed that a number of morphology parameters affect the response of large spheroids to treatment. In particular, we found that both spheroid volume and shape may be a source of variability. We also compared some commercially available viability assays specifically designed for 3D models. In conclusion, our data indicate the need for a pre-selection of tumor spheroids of homogeneous volume and shape to reduce data variability to a minimum before use in a cytotoxicity test. In addition, we identified and validated a cytotoxicity test capable of providing meaningful data on the damage induced in large tumor spheroids of up to diameter in 650 μm by different kinds of treatments.
Collapse
|
572
|
Predicting the growth of glioblastoma multiforme spheroids using a multiphase porous media model. Biomech Model Mechanobiol 2016; 15:1215-28. [PMID: 26746883 DOI: 10.1007/s10237-015-0755-0] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 12/21/2015] [Indexed: 12/11/2022]
Abstract
Tumor spheroids constitute an effective in vitro tool to investigate the avascular stage of tumor growth. These three-dimensional cell aggregates reproduce the nutrient and proliferation gradients found in the early stages of cancer and can be grown with a strict control of their environmental conditions. In the last years, new experimental techniques have been developed to determine the effect of mechanical stress on the growth of tumor spheroids. These studies report a reduction in cell proliferation as a function of increasingly applied stress on the surface of the spheroids. This work presents a specialization for tumor spheroid growth of a previous more general multiphase model. The equations of the model are derived in the framework of porous media theory, and constitutive relations for the mass transfer terms and the stress are formulated on the basis of experimental observations. A set of experiments is performed, investigating the growth of U-87MG spheroids both freely growing in the culture medium and subjected to an external mechanical pressure induced by a Dextran solution. The growth curves of the model are compared to the experimental data, with good agreement for both the experimental settings. A new mathematical law regulating the inhibitory effect of mechanical compression on cancer cell proliferation is presented at the end of the paper. This new law is validated against experimental data and provides better results compared to other expressions in the literature.
Collapse
|
573
|
Qureshi-Baig K, Ullmann P, Rodriguez F, Frasquilho S, Nazarov PV, Haan S, Letellier E. What Do We Learn from Spheroid Culture Systems? Insights from Tumorspheres Derived from Primary Colon Cancer Tissue. PLoS One 2016; 11:e0146052. [PMID: 26745821 PMCID: PMC4706382 DOI: 10.1371/journal.pone.0146052] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Accepted: 12/11/2015] [Indexed: 01/20/2023] Open
Abstract
Due to their self-renewal and tumorigenic properties, tumor-initiating cells (TICs) have been hypothesized to be important targets for colorectal cancer (CRC). However the study of TICs is hampered by the fact that the identification and culturing of TICs is still a subject of extensive debate. Floating three-dimensional spheroid cultures (SC) that grow in serum-free medium supplemented with growth factors are supposed to be enriched in TICs. We generated SC from fresh clinical tumor specimens and compared them to SC isolated from CRC cell-lines as well as to adherent differentiated counterparts. Patient-derived SC display self-renewal capacity and can induce serial transplantable tumors in immuno-deficient mice, which phenotypically resemble the tumor of origin. In addition, the original tumor tissue and established SC retain several similar CRC-relevant mutations. Primary SC express key stemness proteins such as SOX2, OCT4, NANOG and LGR5 and importantly show increased chemoresistance ability compared to their adherent differentiated counterparts and to cell line-derived SC. Strikingly, cells derived from spheroid or adherent differentiating culture conditions displayed similar self-renewal capacity and equally formed tumors in immune-deficient mice, suggesting that self-renewal and tumor-initiation capacity of TICs is not restricted to phenotypically immature spheroid cells, which we describe to be highly plastic and able to reacquire stem-cell traits even after long differentiation processes. Finally, we identified two genes among a sphere gene expression signature that predict disease relapse in CRC patients. Here we propose that SC derived from fresh patient tumor tissue present interesting phenotypic features that may have clinical relevance for chemoresistance and disease relapse and therefore represent a valuable tool to test for new CRC-therapies that overcome drug resistance.
Collapse
Affiliation(s)
- Komal Qureshi-Baig
- Molecular Disease Mechanisms Group, Life Sciences Research Unit, University of Luxembourg, 6 Avenue du Swing, L-4367, Campus Belval, Luxembourg
| | - Pit Ullmann
- Molecular Disease Mechanisms Group, Life Sciences Research Unit, University of Luxembourg, 6 Avenue du Swing, L-4367, Campus Belval, Luxembourg
| | - Fabien Rodriguez
- Molecular Disease Mechanisms Group, Life Sciences Research Unit, University of Luxembourg, 6 Avenue du Swing, L-4367, Campus Belval, Luxembourg
| | - Sónia Frasquilho
- Integrated Biobank of Luxembourg, 6 rue Nicolas Ernest Barblé, L-1210, Luxembourg, Luxembourg
| | - Petr V. Nazarov
- Luxembourg Institute of Health, Genomics Research Unit, 84 Val Fleuri, L-1526, Luxembourg, Luxembourg
| | - Serge Haan
- Molecular Disease Mechanisms Group, Life Sciences Research Unit, University of Luxembourg, 6 Avenue du Swing, L-4367, Campus Belval, Luxembourg
| | - Elisabeth Letellier
- Molecular Disease Mechanisms Group, Life Sciences Research Unit, University of Luxembourg, 6 Avenue du Swing, L-4367, Campus Belval, Luxembourg
| |
Collapse
|
574
|
Eccles SA, Court W, Patterson L. In Vitro Assays for Endothelial Cell Functions Required for Angiogenesis: Proliferation, Motility, Tubular Differentiation, and Matrix Proteolysis. Methods Mol Biol 2016; 1430:121-147. [PMID: 27172950 DOI: 10.1007/978-1-4939-3628-1_8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
This chapter deconstructs the process of angiogenesis into its component parts in order to provide simple assays to measure discrete endothelial cell functions. The techniques described will be suitable for studying stimulators and/or inhibitors of angiogenesis and determining which aspect of the process is modulated. The assays are designed to be robust and straightforward, using human umbilical vein endothelial cells, but with an option to use other sources such as microvascular endothelial cells from various tissues or lymphatic endothelial cells. It must be appreciated that such reductionist approaches cannot cover the complexity of the angiogenic process as a whole, incorporating as it does a myriad of positive and negative signals, three-dimensional interactions with host tissues and many accessory cells including fibroblasts, macrophages, pericytes and platelets. The extent to which in vitro assays predict physiological or pathological processes in vivo (e.g., wound healing, tumor angiogenesis) or surrogate techniques such as the use of Matrigel™ plugs, sponge implants, corneal assays etc remains to be determined.
Collapse
Affiliation(s)
- Suzanne A Eccles
- Cancer Research UK Cancer Therapeutics Unit, Centre for Cancer Imaging, The Institute of Cancer Research, Cotswold Rd., Sutton, Surrey, SM2 5NG, UK.
| | - William Court
- Cancer Research UK Cancer Therapeutics Unit, Centre for Cancer Imaging, The Institute of Cancer Research, Cotswold Rd., Sutton, Surrey, SM2 5NG, UK
| | - Lisa Patterson
- Cancer Research UK Cancer Therapeutics Unit, Centre for Cancer Imaging, The Institute of Cancer Research, Cotswold Rd., Sutton, Surrey, SM2 5NG, UK
| |
Collapse
|
575
|
Leonard F, Godin B. 3D In Vitro Model for Breast Cancer Research Using Magnetic Levitation and Bioprinting Method. Methods Mol Biol 2016; 1406:239-51. [PMID: 26820961 DOI: 10.1007/978-1-4939-3444-7_21] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Tumor microenvironment composition and architecture are known as a major factor in orchestrating the tumor growth and its response to various therapies. In this context, in vivo studies are necessary to evaluate the responses. However, while tumor cells can be of human origin, tumor microenvironment in the in vivo models is host-based. On the other hand, in vitro studies in a flat monoculture of tumor cells (the most frequently used in vitro tumor model) are unable to recapitulate the complexity of tumor microenvironment. Three-dimensional (3D) in vitro cell cultures of tumor cells have been proven to be an important experimental tool in understanding mechanisms of tumor growth, response to therapeutics, and transport of nutrients/drugs. We have recently described a novel tool to create 3D co-cultures of tumor cells and cells in the tumor microenvironment. Our method utilizes magnetic manipulation/levitation of the specific ratios of tumor cells and cells in the tumor microenvironment (from human or animal origin) aiding in the formation of tumor spheres with defined cellular composition and density, as quickly as within 24 h. This chapter describes the experimental protocols developed to model the 3D structure of the cancer environment using the above method.
Collapse
Affiliation(s)
- Fransisca Leonard
- Department of Nanomedicine, Houston Methodist Research Institute, R8-213, 6670 Bertner st, Houston, TX, 77030, USA
| | - Biana Godin
- Department of Nanomedicine, Houston Methodist Research Institute, R8-213, 6670 Bertner st, Houston, TX, 77030, USA.
| |
Collapse
|
576
|
Till U, Gibot L, Vicendo P, Rols MP, Gaucher M, Violleau F, Mingotaud AF. Crosslinked polymeric self-assemblies as an efficient strategy for photodynamic therapy on a 3D cell culture. RSC Adv 2016. [DOI: 10.1039/c6ra09013c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Polymeric crosslinked self-assemblies based on poly(ethyleneoxide-b-ε-caprolactone) have been synthesized. They are shown to be more efficient vectors for photodynamic therapy compared to uncrosslinked systems.
Collapse
Affiliation(s)
- Ugo Till
- Université de Toulouse
- Institut National Polytechnique de Toulouse – Ecole d'Ingénieurs de Purpan
- Département Sciences Agronomiques et Agroalimentaires
- F-31076 Toulouse Cedex 03
- France
| | - Laure Gibot
- Institut de Pharmacologie et de Biologie Structurale
- Université de Toulouse
- CNRS
- UPS
- France
| | - Patricia Vicendo
- Laboratoire des IMRCP
- Université de Toulouse
- CNRS UMR 5623
- Université Paul Sabatier
- Toulouse Cedex 9
| | - Marie-Pierre Rols
- Institut de Pharmacologie et de Biologie Structurale
- Université de Toulouse
- CNRS
- UPS
- France
| | - Mireille Gaucher
- Université de Toulouse
- Institut National Polytechnique de Toulouse – Ecole d'Ingénieurs de Purpan
- Département Sciences Agronomiques et Agroalimentaires
- F-31076 Toulouse Cedex 03
- France
| | - Frédéric Violleau
- Université de Toulouse
- Institut National Polytechnique de Toulouse – Ecole d'Ingénieurs de Purpan
- Laboratoire de Chimie Agro-Industrielle
- Toulouse
- France
| | - Anne-Françoise Mingotaud
- Laboratoire des IMRCP
- Université de Toulouse
- CNRS UMR 5623
- Université Paul Sabatier
- Toulouse Cedex 9
| |
Collapse
|
577
|
Eckerdt F, Alvarez A, Bell J, Arvanitis C, Iqbal A, Arslan AD, Hu B, Cheng SY, Goldman S, Platanias LC. A simple, low-cost staining method for rapid-throughput analysis of tumor spheroids. Biotechniques 2016; 60:43-6. [PMID: 26757811 PMCID: PMC4772731 DOI: 10.2144/000114372] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Accepted: 09/23/2015] [Indexed: 01/17/2023] Open
Abstract
Tumor spheroids are becoming an important tool for the investigation of cancer stem cell (CSC) function in tumors; thus, low-cost and high-throughput methods for drug screening of tumor spheroids are needed. Using neurospheres as non-adherent three-dimensional (3-D) cultures, we developed a simple, low-cost acridine orange (AO)-based method that allows for rapid analysis of live neurospheres by fluorescence microscopy in a 96-well format. This assay measures the cross-section area of a spheroid, which corresponds to cell viability. Our novel method allows rapid screening of a panel of anti-proliferative drugs to assess inhibitory effects on the growth of cancer stem cells in 3-D cultures.
Collapse
Affiliation(s)
- Frank Eckerdt
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology- Oncology, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Angel Alvarez
- Department of Neurology, Robert H. Lurie Comprehensive Cancer Center, Northwestern Brain Tumor Institute, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Jonathan Bell
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology- Oncology, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Constadina Arvanitis
- Center for Advanced Microscopy and Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Asneha Iqbal
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology- Oncology, Northwestern University Feinberg School of Medicine, Chicago, IL
- Division of Hematology and Oncology, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL
| | - Ahmet D. Arslan
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology- Oncology, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Bo Hu
- Department of Neurology, Robert H. Lurie Comprehensive Cancer Center, Northwestern Brain Tumor Institute, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Shi-Yuan Cheng
- Department of Neurology, Robert H. Lurie Comprehensive Cancer Center, Northwestern Brain Tumor Institute, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Stewart Goldman
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology- Oncology, Northwestern University Feinberg School of Medicine, Chicago, IL
- Division of Hematology and Oncology, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL
| | - Leonidas C. Platanias
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology- Oncology, Northwestern University Feinberg School of Medicine, Chicago, IL
- Department of Medicine, Jesse Brown VA Medical Center, Chicago, IL
| |
Collapse
|
578
|
Lochhead PA, Clark J, Wang LZ, Gilmour L, Squires M, Gilley R, Foxton C, Newell DR, Wedge SR, Cook SJ. Tumor cells with KRAS or BRAF mutations or ERK5/MAPK7 amplification are not addicted to ERK5 activity for cell proliferation. Cell Cycle 2016; 15:506-18. [PMID: 26959608 PMCID: PMC5056618 DOI: 10.1080/15384101.2015.1120915] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Revised: 10/08/2015] [Accepted: 11/12/2015] [Indexed: 10/24/2022] Open
Abstract
ERK5, encoded by MAPK7, has been proposed to play a role in cell proliferation, thus attracting interest as a cancer therapeutic target. While oncogenic RAS or BRAF cause sustained activation of the MEK1/2-ERK1/2 pathway, ERK5 is directly activated by MEK5. It has been proposed that RAS and RAF proteins can also promote ERK5 activation. Here we investigated the interplay between RAS-RAF-MEK-ERK and ERK5 signaling and studied the role of ERK5 in tumor cell proliferation in 2 disease-relevant cell models. We demonstrate that although an inducible form of CRAF (CRAF:ER*) can activate ERK5 in fibroblasts, the response is delayed and reflects feed-forward signaling. Additionally, oncogenic KRAS and BRAF do not activate ERK5 in epithelial cells. Although KRAS and BRAF do not couple directly to MEK5-ERK5, ERK5 signaling might still be permissive for proliferation. However, neither the selective MEK5 inhibitor BIX02189 or ERK5 siRNA inhibited proliferation of colorectal cancer cells harbouring KRAS(G12C/G13D) or BRAF(V600E). Furthermore, there was no additive or synergistic effect observed when BIX02189 was combined with the MEK1/2 inhibitor Selumetinib (AZD6244), suggesting that ERK5 was neither required for proliferation nor a driver of innate resistance to MEK1/2 inhibitors. Finally, even cancer cells with MAPK7 amplification were resistant to BIX02189 and ERK5 siRNA, showing that ERK5 amplification does not confer addiction to ERK5 for cell proliferation. Thus ERK5 signaling is unlikely to play a role in tumor cell proliferation downstream of KRAS or BRAF or in tumor cells with ERK5 amplification. These results have important implications for the role of ERK5 as an anti-cancer drug target.
Collapse
Affiliation(s)
| | - Jonathan Clark
- Biological Chemistry Facility; The Babraham Institute; Cambridge, UK
| | - Lan-Zhen Wang
- The Northern Institute for Cancer Research; University of Newcastle upon Tyne, Newcastle, UK
| | - Lesley Gilmour
- Cancer Research Technology; The Beatson Institute for Cancer Research; Garscube Estate; Glasgow, UK
- Current address: Translational Radiation Biology; The Beatson Institute for Cancer Research; Garscube Estate; Glasgow, UK
| | - Matthew Squires
- Signalling Laboratory; The Babraham Institute; Cambridge, UK
- Current address: Novartis; Basel, Switzerland
| | - Rebecca Gilley
- Signalling Laboratory; The Babraham Institute; Cambridge, UK
| | - Caroline Foxton
- Cancer Research Technology; CRT Discovery Laboratories; London Bioscience Innovation Centre; London, UK
- Current address: Centre for Drug Development; Cancer Research UK; London, UK
| | - David R. Newell
- The Northern Institute for Cancer Research; University of Newcastle upon Tyne, Newcastle, UK
| | - Stephen R. Wedge
- The Northern Institute for Cancer Research; University of Newcastle upon Tyne, Newcastle, UK
| | - Simon J. Cook
- Signalling Laboratory; The Babraham Institute; Cambridge, UK
| |
Collapse
|
579
|
Abstract
The microenvironment is increasingly recognized to have key roles in cancer, and biomaterials provide a means to engineer microenvironments both in vitro and in vivo to study and manipulate cancer. In vitro cancer models using 3D matrices recapitulate key elements of the tumour microenvironment and have revealed new aspects of cancer biology. Cancer vaccines based on some of the same biomaterials have, in parallel, allowed for the engineering of durable prophylactic and therapeutic anticancer activity in preclinical studies, and some of these vaccines have moved to clinical trials. The impact of biomaterials engineering on cancer treatment is expected to further increase in importance in the years to come.
Collapse
Affiliation(s)
- Luo Gu
- Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02138, USA
| | - David J Mooney
- Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02138, USA
| |
Collapse
|
580
|
Ma J, Zhang X, Liu Y, Yu H, Liu L, Shi Y, Li Y, Qin J. Patterning hypoxic multicellular spheroids in a 3D matrix - a promising method for anti-tumor drug screening. Biotechnol J 2015; 11:127-34. [PMID: 26647062 DOI: 10.1002/biot.201500183] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2015] [Revised: 11/03/2015] [Accepted: 12/07/2015] [Indexed: 11/10/2022]
Abstract
3D multicellular spheroid models are of great value in the investigation of tumor biology and tumor responses to chemotherapy and radiation. To establish a mimicking tumor microenvironment in vitro, we developed a straightforward method by patterning hypoxic multicellular spheroids in a 3D matrix. The efficacy of this approach was evaluated by characterizing spheroid formation, invasive capability and phenotypic transition in aggressive human glioma cells. We observed enhanced cell proliferation, spheroid formation and invasive capability in U87 glioma cells transfected with hypoxia-inducible factors (HIFs) compared with non-treated cells. We also demonstrated that the overexpression of HIFs in hypoxic glioma cells may promote cell migration by epithelial-mesenchymal transition within the 3D matrix. Compared with conventional 3D culturing techniques, the simple operation, rapid prototyping, low cost and high throughput format of the micro-patterning method facilitates the characterization of cell proliferation, migration, phenotypic function and drug evaluation in physiologically relevant 3D microenvironments. This in vitro 3D system can recapitulate the physiologically relevant tumor microenvironment and is a promising method for 3D anti-tumor drug screening and the identification of novel targets for tumor invasion and angiogenesis.
Collapse
Affiliation(s)
- Jingyun Ma
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.,The First Affiliated Hospital of Dalian Medical University, Dalian, China.,State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang, China
| | - Xu Zhang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Yang Liu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Haibo Yu
- State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang, China
| | - Lianqing Liu
- State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang, China
| | - Yang Shi
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Yanfeng Li
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Jianhua Qin
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.
| |
Collapse
|
581
|
Kusakawa S, Yasuda S, Kuroda T, Kawamata S, Sato Y. Ultra-sensitive detection of tumorigenic cellular impurities in human cell-processed therapeutic products by digital analysis of soft agar colony formation. Sci Rep 2015; 5:17892. [PMID: 26644244 PMCID: PMC4672267 DOI: 10.1038/srep17892] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Accepted: 11/09/2015] [Indexed: 12/19/2022] Open
Abstract
Contamination with tumorigenic cellular impurities is one of the most pressing concerns for human cell-processed therapeutic products (hCTPs). The soft agar colony formation (SACF) assay, which is a well-known in vitro assay for the detection of malignant transformed cells, is applicable for the quality assessment of hCTPs. Here we established an image-based screening system for the SACF assay using a high-content cell analyzer termed the digital SACF assay. Dual fluorescence staining of formed colonies and the dissolution of soft agar led to accurate detection of transformed cells with the imaging cytometer. Partitioning a cell sample into multiple wells of culture plates enabled digital readout of the presence of colonies and elevated the sensitivity for their detection. In practice, the digital SACF assay detected impurity levels as low as 0.00001% of the hCTPs, i.e. only one HeLa cell contained in 10,000,000 human mesenchymal stem cells, within 30 days. The digital SACF assay saves time, is more sensitive than in vivo tumorigenicity tests, and would be useful for the quality control of hCTPs in the manufacturing process.
Collapse
Affiliation(s)
- Shinji Kusakawa
- Japan Agency for Medical Research and Development (AMED), Tokyo, Japan
- Division of Cell-Based Therapeutic Products, National Institute of Health Sciences, Tokyo, Japan
- Research and Development Center for Cell Therapy, Foundation for Biomedical Research and Innovation, Kobe, Japan
| | - Satoshi Yasuda
- Division of Cell-Based Therapeutic Products, National Institute of Health Sciences, Tokyo, Japan
- Research and Development Center for Cell Therapy, Foundation for Biomedical Research and Innovation, Kobe, Japan
| | - Takuya Kuroda
- Division of Cell-Based Therapeutic Products, National Institute of Health Sciences, Tokyo, Japan
- Research and Development Center for Cell Therapy, Foundation for Biomedical Research and Innovation, Kobe, Japan
| | - Shin Kawamata
- Research and Development Center for Cell Therapy, Foundation for Biomedical Research and Innovation, Kobe, Japan
| | - Yoji Sato
- Division of Cell-Based Therapeutic Products, National Institute of Health Sciences, Tokyo, Japan
- Research and Development Center for Cell Therapy, Foundation for Biomedical Research and Innovation, Kobe, Japan
- Department of Quality Assurance Science for Pharmaceuticals, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan
- Department of Cellular and Gene Therapy Products, Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
- Department of Translational Pharmaceutical Sciences, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
| |
Collapse
|
582
|
Vishnoi M, Peddibhotla S, Yin W, T Scamardo A, George GC, Hong DS, Marchetti D. The isolation and characterization of CTC subsets related to breast cancer dormancy. Sci Rep 2015; 5:17533. [PMID: 26631983 PMCID: PMC4668355 DOI: 10.1038/srep17533] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Accepted: 10/30/2015] [Indexed: 02/08/2023] Open
Abstract
Uncovering CTCs phenotypes offer the promise to dissect their heterogeneity related to metastatic competence. CTC survival rates are highly variable and this can lead to many questions as yet unexplored properties of CTCs responsible for invasion and metastasis vs dormancy. We isolated CTC subsets from peripheral blood of patients diagnosed with or without breast cancer brain metastasis. CTC subsets were selected for EpCAM negativity but positivity for CD44(+)/CD24(-) stem cell signature; along with combinatorial expression of uPAR and int β1, two markers directly implicated in breast cancer dormancy mechanisms. CTC subsets were cultured in vitro generating 3D CTC tumorspheres which were interrogated for biomarker profiling and biological characteristics. We identified proliferative and invasive properties of 3D CTC tumorspheres distinctive upon uPAR/int β1 combinatorial expression. The molecular characterization of uPAR/int β1 CTC subsets may enhance abilities to prospectively identify patients who may be at high risk of developing BCBM.
Collapse
Affiliation(s)
- Monika Vishnoi
- Biomarker Research Program Center, Houston Methodist Research Institute, Houston, TX
| | - Sirisha Peddibhotla
- Department of Pathology &Immunology, Baylor College of Medicine, Houston, TX
| | - Wei Yin
- Biomarker Research Program Center, Houston Methodist Research Institute, Houston, TX
| | - Antonio T Scamardo
- Department of Investigational Cancer Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Goldy C George
- Department of Investigational Cancer Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - David S Hong
- Department of Investigational Cancer Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Dario Marchetti
- Biomarker Research Program Center, Houston Methodist Research Institute, Houston, TX.,Department of Molecular &Cellular Biology and The Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX
| |
Collapse
|
583
|
Knight E, Przyborski S. Advances in 3D cell culture technologies enabling tissue-like structures to be created in vitro. J Anat 2015; 227:746-56. [PMID: 25411113 PMCID: PMC4694114 DOI: 10.1111/joa.12257] [Citation(s) in RCA: 350] [Impact Index Per Article: 38.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/12/2014] [Indexed: 12/15/2022] Open
Abstract
Research in mammalian cell biology often relies on developing in vitro models to enable the growth of cells in the laboratory to investigate a specific biological mechanism or process under different test conditions. The quality of such models and how they represent the behavior of cells in real tissues plays a critical role in the value of the data produced and how it is used. It is particularly important to recognize how the structure of a cell influences its function and how co-culture models can be used to more closely represent the structure of real tissue. In recent years, technologies have been developed to enhance the way in which researchers can grow cells and more readily create tissue-like structures. Here we identify the limitations of culturing mammalian cells by conventional methods on two-dimensional (2D) substrates and review the popular approaches currently available that enable the development of three-dimensional (3D) tissue models in vitro. There are now many ways in which the growth environment for cultured cells can be altered to encourage 3D cell growth. Approaches to 3D culture can be broadly categorized into scaffold-free or scaffold-based culture systems, with scaffolds made from either natural or synthetic materials. There is no one particular solution that currently satisfies all requirements and researchers must select the appropriate method in line with their needs. Using such technology in conjunction with other modern resources in cell biology (e.g. human stem cells) will provide new opportunities to create robust human tissue mimetics for use in basic research and drug discovery. Application of such models will contribute to advancing basic research, increasing the predictive accuracy of compounds, and reducing animal usage in biomedical science.
Collapse
Affiliation(s)
- Eleanor Knight
- School of Biological and Biomedical ScienceDurham UniversityDurhamUK
| | - Stefan Przyborski
- School of Biological and Biomedical ScienceDurham UniversityDurhamUK
| |
Collapse
|
584
|
Rossi ÚA, Finocchiaro LME, Glikin GC. Interferon-β gene transfer inhibits melanoma cells adhesion and migration. Cytokine 2015; 89:201-208. [PMID: 26597133 DOI: 10.1016/j.cyto.2015.11.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 11/08/2015] [Accepted: 11/09/2015] [Indexed: 02/06/2023]
Abstract
We evaluated the effects of expression of interferon-β (IFNβ) after lipofection on melanoma cells adhesion and migration. Three canine mucosal (Ak, Br and Ol) and one human dermal (SB2) melanomas were assayed. By means of the wound healing assay, we found a significant inhibitory effect of canine IFNβ gene expression on cells migration in Br and Ol monolayers. This effect could be reproduced on unlipofected Ol cells with conditioned culture media obtained from canine IFNβ gene-lipofected Ol cells, and with recombinant human IFNβ on unlipofected SB2 cells. Furthermore, IFNβ gene expression of the four tested tumor cells significantly inhibited their adhesion to extracellular matrix (ECM) proteins and their spreading from multicellular spheroids onto gelatin coating. The addition of catalase reverted the increase of reactive oxygen species (ROS) in Ol cells and the inhibition of cell migration in monolayers (Ol) and spheroids (Ol an SB2) produced by canine and human IFNβ expression, suggesting the involvement of ROS as mediators of IFNβ action on the cells interactions with ECM. Together with its known immune, antiangiogenic and cytotoxic effects, the present data strongly support more studies exploring the clinical potential of IFNβ for cancer therapy.
Collapse
Affiliation(s)
- Úrsula A Rossi
- Unidad de Transferencia Genética, Instituto de Oncología "Ángel H. Roffo", Universidad de Buenos Aires, Argentina
| | - Liliana M E Finocchiaro
- Unidad de Transferencia Genética, Instituto de Oncología "Ángel H. Roffo", Universidad de Buenos Aires, Argentina
| | - Gerardo C Glikin
- Unidad de Transferencia Genética, Instituto de Oncología "Ángel H. Roffo", Universidad de Buenos Aires, Argentina.
| |
Collapse
|
585
|
Stadler M, Walter S, Walzl A, Kramer N, Unger C, Scherzer M, Unterleuthner D, Hengstschläger M, Krupitza G, Dolznig H. Increased complexity in carcinomas: Analyzing and modeling the interaction of human cancer cells with their microenvironment. Semin Cancer Biol 2015; 35:107-24. [DOI: 10.1016/j.semcancer.2015.08.007] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 08/19/2015] [Accepted: 08/21/2015] [Indexed: 02/08/2023]
|
586
|
Clemente-Vicario F, Alvarez CE, Rowell JL, Roy S, London CA, Kisseberth WC, Lorch G. Human Genetic Relevance and Potent Antitumor Activity of Heat Shock Protein 90 Inhibition in Canine Lung Adenocarcinoma Cell Lines. PLoS One 2015; 10:e0142007. [PMID: 26560147 PMCID: PMC4641597 DOI: 10.1371/journal.pone.0142007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 10/15/2015] [Indexed: 12/22/2022] Open
Abstract
Background It has been an open question how similar human and canine lung cancers are. This has major implications in availability of human treatments for dogs and in establishing translational models to test new therapies in pet dogs. The prognosis for canine advanced lung cancer is poor and new treatments are needed. Heat shock protein 90 (HSP90) is an ATPase-dependent molecular chaperone ubiquitously expressed in eukaryotic cells. HSP90 is essential for posttranslational conformational maturation and stability of client proteins including protein kinases and transcription factors, many of which are important for the proliferation and survival of cancer cells. We investigated the activity of STA-1474, a HSP90 inhibitor, in two canine lung cancer cell lines, BACA and CLAC. Results Comparative genomic hybridization analysis of both cell lines revealed genetic relevance to human non-small cell lung cancer. STA-1474 inhibited growth and induced apoptosis of both cell lines in a dose- and time-dependent manner. The ICs50 after 72 h treatment with STA-1474 were 0.08 and 0.11 μM for BACA and CLAC, respectively. When grown as spheroids, the IC50 of STA-1474 for BACA cells was approximately two-fold higher than when grown as a monolayer (0.348 μM vs. 0.168 μM), whereas CLAC spheroids were relatively drug resistant. Treatment of tumor-stromal fibroblasts with STA-1474 resulted in a dose-dependent decrease in their relative cell viability with a low IC50 of 0.28 μM. Conclusions Here we first established that lung adenocarcinoma in people and dogs are genetically and biochemically similar. STA1474 demonstrated biological activity in both canine lung cancer cell lines and tumor-stromal fibroblasts. As significant decreases in relative cell viability can be achieved with nanomolar concentrations of STA-1474, investigation into the clinical efficacy of this drug in canine lung cancer patients is warranted.
Collapse
Affiliation(s)
- Francisco Clemente-Vicario
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, United States of America
| | - Carlos E. Alvarez
- Center for Molecular and Human Genetics, The Research Institute at Nationwide Children’s Hospital, Columbus, Ohio, United States of America
| | - Jennie L. Rowell
- College of Nursing, The Ohio State University, Columbus, Ohio, United States of America
| | - Satavisha Roy
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, United States of America
| | - Cheryl A. London
- Department of Veterinary Biosciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, United States of America
| | - William C. Kisseberth
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, United States of America
| | - Gwendolen Lorch
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, United States of America
- * E-mail:
| |
Collapse
|
587
|
England CG, Gobin AM, Frieboes HB. Evaluation of uptake and distribution of gold nanoparticles in solid tumors. EUROPEAN PHYSICAL JOURNAL PLUS 2015; 130:231. [PMID: 27014559 PMCID: PMC4800753 DOI: 10.1140/epjp/i2015-15231-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Although nanotherapeutics offer a targeted and potentially less toxic alternative to systemic chemotherapy in cancer treatment, nanotherapeutic transport is typically hindered by abnormal characteristics of tumor tissue. Once nanoparticles targeted to tumor cells arrive in the circulation of tumor vasculature, they must extravasate from irregular vessels and diffuse through the tissue to ideally reach all malignant cells in cytotoxic concentrations. The enhanced permeability and retention effect can be leveraged to promote extravasation of appropriately sized particles from tumor vasculature; however, therapeutic success remains elusive partly due to inadequate intra-tumoral transport promoting heterogeneous nanoparticle uptake and distribution. Irregular tumor vasculature not only hinders particle transport but also sustains hypoxic tissue kregions with quiescent cells, which may be unaffected by cycle-dependent chemotherapeutics released from nanoparticles and thus regrow tumor tissue following nanotherapy. Furthermore, a large proportion of systemically injected nanoparticles may become sequestered by the reticuloendothelial system, resulting in overall diminished efficacy. We review recent work evaluating the uptake and distribution of gold nanoparticles in pre-clinical tumor models, with the goal to help improve nanotherapy outcomes. We also examine the potential role of novel layered gold nanoparticles designed to address some of these critical issues, assessing their uptake and transport in cancerous tissue.
Collapse
Affiliation(s)
- Christopher G England
- Department of Pharmacology & Toxicology, University of Louisville, Louisville, KY 40292, USA; James Graham Brown Cancer Center, University of Louisville, Louisville, KY 40292, USA
| | - André M Gobin
- Department of Bioengineering, University of Louisville, Louisville, KY 40292, USA
| | - Hermann B Frieboes
- Department of Pharmacology & Toxicology, University of Louisville, Louisville, KY 40292, USA; James Graham Brown Cancer Center, University of Louisville, Louisville, KY 40292, USA; Department of Bioengineering, University of Louisville, Louisville, KY 40292, USA
| |
Collapse
|
588
|
Chen Y, Gao D, Liu H, Lin S, Jiang Y. Drug cytotoxicity and signaling pathway analysis with three-dimensional tumor spheroids in a microwell-based microfluidic chip for drug screening. Anal Chim Acta 2015; 898:85-92. [PMID: 26526913 DOI: 10.1016/j.aca.2015.10.006] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 10/04/2015] [Accepted: 10/06/2015] [Indexed: 12/28/2022]
Abstract
Currently, there has been a growing need for developing in vitro models to better reflect organism response to chemotherapy at tissue level. For this reason, a microfluidic platform was developed for mimicking physiological microenvironment of solid tumor with multicellular tumor spheroids (MTS) for anticancer drug screening. Importantly, the power of this system over traditional systems is that it is simple to operate and high integration in a more physiologically relevant context. As a proof of concept, long-term MTS cultures with uniform structure were realized on the microfluidic based platform. The response of doxorubicin and paclitaxel on different types of spheroids were simultaneously performed by in situ Live/Dead fluorescence stain to provide spatial distribution of dead cells as well as cytotoxicity information. In addition, the established platform combined with microplate reader was capable to determine the cytotoxicity of different sized MTS, showing a more powerful tool than cell staining examination at the end-point of assay. The HCT116 spheroids were then lysed on chip followed by signaling transduction pathway analysis. To our knowledge, the on chip drug screening study is the first to address the drug susceptibility testing and the offline detailed drug signaling pathway analysis combination on one system. Thus, this novel microfluidic platform provides a useful tool for drug screening with tumor spheroids, which is crucial for drug discovery and development.
Collapse
Affiliation(s)
- Yongli Chen
- School of Medicine, Tsinghua University, Beijing 100084, China; Key Lab of Chemical Genomics, School of Chemical Biology & Biotechnology, Graduate School at Shenzhen, Peking University, Shenzhen 518055, China
| | - Dan Gao
- State Key Laboratory Breeding Base-Shenzhen Key Laboratory of Chemical Biology, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China; Key Laboratory of Metabolomics at Shenzhen, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
| | - Hongxia Liu
- State Key Laboratory Breeding Base-Shenzhen Key Laboratory of Chemical Biology, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China; Key Laboratory of Metabolomics at Shenzhen, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
| | - Shuo Lin
- Key Lab of Chemical Genomics, School of Chemical Biology & Biotechnology, Graduate School at Shenzhen, Peking University, Shenzhen 518055, China
| | - Yuyang Jiang
- School of Medicine, Tsinghua University, Beijing 100084, China; State Key Laboratory Breeding Base-Shenzhen Key Laboratory of Chemical Biology, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
| |
Collapse
|
589
|
A novel 3D high-content assay identifies compounds that prevent fibroblast invasion into tissue surrogates. Exp Cell Res 2015; 339:35-43. [PMID: 26475730 DOI: 10.1016/j.yexcr.2015.10.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Revised: 09/29/2015] [Accepted: 10/02/2015] [Indexed: 11/23/2022]
Abstract
Invasion processes underlie or accompany several pathological processes but only a limited number of high-throughput capable phenotypic models exist to test anti-invasive compounds in vitro. We here evaluated 3D co-cultures as a high-content phenotypic screening system for fibrotic invasive processes. 3D multicellular spheroids were used as living tissue surrogates in co-culture with fluorescently labeled lung fibroblasts to monitor invasion processes by automated microscopy. This setup was used to screen a compound library containing 480 known bioactive substances. Identified hits prevented fibroblast invasion and could be subdivided into two hit classes. First, Prostaglandins were shown to prevent fibroblast invasion, most likely mediated by the prostaglandin EP2 receptor and generation of cAMP. Additionally, Rho-associated protein kinase (ROCK) inhibitors prevented fibroblast invasion, possibly by inactivation of myosin II. Importantly, both Prostaglandins and ROCK inhibitors are potential treatment options shown to be effective in in vitro and in vivo models of fibrotic diseases. This validates the presented novel phenotypic screening approach for the evaluation of potential inhibitors and the identification of novel compounds with activity in diseases that are associated with fibroblast invasion.
Collapse
|
590
|
Enhanced G2/M Arrest, Caspase Related Apoptosis and Reduced E-Cadherin Dependent Intercellular Adhesion by Trabectedin in Prostate Cancer Stem Cells. PLoS One 2015; 10:e0141090. [PMID: 26485709 PMCID: PMC4618065 DOI: 10.1371/journal.pone.0141090] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 10/03/2015] [Indexed: 11/19/2022] Open
Abstract
Trabectedin (Yondelis, ET-743) is a marine-derived tetrahydroisoquinoline alkaloid. It is originally derived from the Caribbean marine tunicate Ecteinascidia turbinata and currently produced synthetically. Trabectedin is active against a variety of tumor cell lines growing in culture. The present study focused on the effect of trabectedin in cell proliferation, cell cycle progression, apoptosis and spheroid formation in prostate cancer stem cells (CSCs). Cluster of differentiation (CD) 133+high/CD44+high prostate CSCs were isolated from the DU145 and PC-3 human prostate cancer cell line through flow cytometry. We studied the growth-inhibitory effects of trabectedin and its molecular mechanisms on human prostate CSCs and non-CSCs. DU-145 and PC-3 CSCs were treated with 0.1, 1, 10 and 100 nM trabectedin for 24, 48 and 72 h and the growth inhibition rates were examined using the sphere-forming assay. Annexin-V assay and immunofluorescence analyses were performed for the detection of the cell death. Concentration-dependent effects of trabectedin on the cell cycle were also evaluated. The cells were exposed to the different doses of trabectedin for 24, 48 and 72 h to evaluate the effect of trabectedin on the number and diameter of spheroids. According to the results, trabectedin induced cytotoxicity and apoptosis at the IC50 dose, resulting in a significant increase expression of caspase-3, caspase-8, caspase-9, p53 and decrease expression of bcl-2 in dose-dependent manner. Cell cycle analyses revealed that trabectedin induces dose-dependent G2/M-phase cell cycle arrest, particularly at high-dose treatments. Three-dimensional culture studies showed that trabectedin reduced the number and diameter of spheroids of DU145 and PC3 CSCs. Furthermore, we have found that trabectedin disrupted cell-cell interactions via E-cadherin in prostasphere of DU-145 and PC-3 CSCs. Our results showed that trabectedin inhibits cellular proliferation and accelerates apoptotic events in prostate CSCs; and may be a potential effective therapeutic agent against prostate cancer.
Collapse
|
591
|
Weiswald LB, Bellet D, Dangles-Marie V. Spherical cancer models in tumor biology. Neoplasia 2015; 17:1-15. [PMID: 25622895 PMCID: PMC4309685 DOI: 10.1016/j.neo.2014.12.004] [Citation(s) in RCA: 765] [Impact Index Per Article: 85.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Revised: 11/29/2014] [Accepted: 12/04/2014] [Indexed: 12/13/2022] Open
Abstract
Three-dimensional (3D) in vitro models have been used in cancer research as an intermediate model between in vitro cancer cell line cultures and in vivo tumor. Spherical cancer models represent major 3D in vitro models that have been described over the past 4 decades. These models have gained popularity in cancer stem cell research using tumorospheres. Thus, it is crucial to define and clarify the different spherical cancer models thus far described. Here, we focus on in vitro multicellular spheres used in cancer research. All these spherelike structures are characterized by their well-rounded shape, the presence of cancer cells, and their capacity to be maintained as free-floating cultures. We propose a rational classification of the four most commonly used spherical cancer models in cancer research based on culture methods for obtaining them and on subsequent differences in sphere biology: the multicellular tumor spheroid model, first described in the early 70s and obtained by culture of cancer cell lines under nonadherent conditions; tumorospheres, a model of cancer stem cell expansion established in a serum-free medium supplemented with growth factors; tissue-derived tumor spheres and organotypic multicellular spheroids, obtained by tumor tissue mechanical dissociation and cutting. In addition, we describe their applications to and interest in cancer research; in particular, we describe their contribution to chemoresistance, radioresistance, tumorigenicity, and invasion and migration studies. Although these models share a common 3D conformation, each displays its own intrinsic properties. Therefore, the most relevant spherical cancer model must be carefully selected, as a function of the study aim and cancer type.
Collapse
Affiliation(s)
- Louis-Bastien Weiswald
- Division of Gastroenterology, Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada; Michael Smith Genome Sciences Center, British Columbia Cancer Agency, Vancouver, British Columbia, Canada; Laboratoire d'Oncobiologie, Hôpital René Huguenin, Institut Curie, St Cloud, France; Université Paris Descartes, Faculté de Pharmacie de Paris, Sorbonne Paris Cité, Paris, France.
| | - Dominique Bellet
- Laboratoire d'Oncobiologie, Hôpital René Huguenin, Institut Curie, St Cloud, France; Université Paris Descartes, Faculté des Sciences Pharmaceutiques et Biologiques, UMR 8151 CNRS-U1022 Inserm, Sorbonne Paris Cité, Paris, France
| | - Virginie Dangles-Marie
- Université Paris Descartes, Faculté de Pharmacie de Paris, Sorbonne Paris Cité, Paris, France; Département de Recherche Translationnelle, Research Center, Institut Curie, Paris, France.
| |
Collapse
|
592
|
Martinez NJ, Titus SA, Wagner AK, Simeonov A. High-throughput fluorescence imaging approaches for drug discovery using in vitro and in vivo three-dimensional models. Expert Opin Drug Discov 2015; 10:1347-61. [PMID: 26394277 DOI: 10.1517/17460441.2015.1091814] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
INTRODUCTION High-resolution microscopy using fluorescent probes is a powerful tool to investigate individual cell structure and function, cell subpopulations and mechanisms underlying cellular responses to drugs. Additionally, responses to drugs more closely resemble those seen in vivo when cells are physically connected in three-dimensional (3D) systems (either 3D cell cultures or whole organisms), as opposed to traditional monolayer cultures. Combined, the use of imaging-based 3D models in the early stages of drug development has the potential to generate biologically relevant data that will increase the likelihood of success for drug candidates in human studies. AREAS COVERED The authors discuss current methods for the culturing of cells in 3D as well as approaches for the imaging of whole-animal models and 3D cultures that are amenable to high-throughput settings and could be implemented to support drug discovery campaigns. Furthermore, they provide critical considerations when discussing imaging these 3D systems for high-throughput chemical screenings. EXPERT OPINION Despite widespread understanding of the limitations imposed by the two-dimensional versus the 3D cellular paradigm, imaging-based drug screening of 3D cellular models is still limited, with only a few screens found in the literature. Image acquisition in high throughput, accurate interpretation of fluorescent signal, and uptake of staining reagents can be challenging, as the samples are in essence large aggregates of cells. The authors recognize these shortcomings that need to be overcome before the field can accelerate the utilization of these technologies in large-scale chemical screens.
Collapse
Affiliation(s)
- Natalia J Martinez
- a National Institutes of Health, National Center for Advancing Translational Sciences , Rockville, MD 20850, USA
| | - Steven A Titus
- a National Institutes of Health, National Center for Advancing Translational Sciences , Rockville, MD 20850, USA
| | - Amanda K Wagner
- a National Institutes of Health, National Center for Advancing Translational Sciences , Rockville, MD 20850, USA
| | - Anton Simeonov
- a National Institutes of Health, National Center for Advancing Translational Sciences , Rockville, MD 20850, USA
| |
Collapse
|
593
|
Monjaret F, Fernandes M, Duchemin-Pelletier E, Argento A, Degot S, Young J. Fully Automated One-Step Production of Functional 3D Tumor Spheroids for High-Content Screening. ACTA ACUST UNITED AC 2015; 21:268-80. [PMID: 26385905 DOI: 10.1177/2211068215607058] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Indexed: 11/15/2022]
Abstract
Adoption of spheroids within high-content screening (HCS) has lagged behind high-throughput screening (HTS) due to issues with running complex assays on large three-dimensional (3D) structures.To enable multiplexed imaging and analysis of spheroids, different cancer cell lines were grown in 3D on micropatterned 96-well plates with automated production of nine uniform spheroids per well. Spheroids achieve diameters of up to 600 µm, and reproducibility was experimentally validated (interwell and interplate CV(diameter) <5%). Biphoton imaging confirmed that micropatterned spheroids exhibit characteristic cell heterogeneity with distinct microregions. Furthermore, central necrosis appears at a consistent spheroid size, suggesting standardized growth.Using three reference compounds (fluorouracil, irinotecan, and staurosporine), we validated HT-29 micropatterned spheroids on an HCS platform, benchmarking against hanging-drop spheroids. Spheroid formation and imaging in a single plate accelerate assay workflow, and fixed positioning prevents structures from overlapping or sticking to the well wall, augmenting image processing reliability. Furthermore, multiple spheroids per well increase the statistical confidence sufficiently to discriminate compound mechanisms of action and generate EC50 values for endpoints of cell death, architectural change, and size within a single-pass read. Higher quality data and a more efficient HCS work chain should encourage integration of micropatterned spheroid models within fundamental research and drug discovery applications.
Collapse
Affiliation(s)
| | | | | | | | | | - Joanne Young
- CYTOO SA, Minatec-BHT-Bât 52, Grenoble, 38040, France
| |
Collapse
|
594
|
A spheroid toxicity assay using magnetic 3D bioprinting and real-time mobile device-based imaging. Sci Rep 2015; 5:13987. [PMID: 26365200 PMCID: PMC4568483 DOI: 10.1038/srep13987] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Accepted: 08/12/2015] [Indexed: 01/09/2023] Open
Abstract
An ongoing challenge in biomedical research is the search for simple, yet robust assays using 3D cell cultures for toxicity screening. This study addresses that challenge with a novel spheroid assay, wherein spheroids, formed by magnetic 3D bioprinting, contract immediately as cells rearrange and compact the spheroid in relation to viability and cytoskeletal organization. Thus, spheroid size can be used as a simple metric for toxicity. The goal of this study was to validate spheroid contraction as a cytotoxic endpoint using 3T3 fibroblasts in response to 5 toxic compounds (all-trans retinoic acid, dexamethasone, doxorubicin, 5′-fluorouracil, forskolin), sodium dodecyl sulfate (+control), and penicillin-G (−control). Real-time imaging was performed with a mobile device to increase throughput and efficiency. All compounds but penicillin-G significantly slowed contraction in a dose-dependent manner (Z’ = 0.88). Cells in 3D were more resistant to toxicity than cells in 2D, whose toxicity was measured by the MTT assay. Fluorescent staining and gene expression profiling of spheroids confirmed these findings. The results of this study validate spheroid contraction within this assay as an easy, biologically relevant endpoint for high-throughput compound screening in representative 3D environments.
Collapse
|
595
|
Nanomedicine applied to translational oncology: A future perspective on cancer treatment. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2015; 12:81-103. [PMID: 26370707 DOI: 10.1016/j.nano.2015.08.006] [Citation(s) in RCA: 151] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 07/17/2015] [Accepted: 08/27/2015] [Indexed: 01/08/2023]
Abstract
The high global incidence of cancer is associated with high rates of mortality and morbidity worldwide. By taking advantage of the properties of matter at the nanoscale, nanomedicine promises to develop innovative drugs with greater efficacy and less side effects than standard therapies. Here, we discuss both clinically available anti-cancer nanomedicines and those en route to future clinical application. The properties, therapeutic value, advantages and limitations of these nanomedicine products are highlighted, with a focus on their increased performance versus conventional molecular anticancer therapies. The main regulatory challenges toward the translation of innovative, clinically effective nanotherapeutics are discussed, with a view to improving current approaches to the clinical management of cancer. Ultimately, it becomes clear that the critical steps for clinical translation of nanotherapeutics require further interdisciplinary and international effort, where the whole stakeholder community is involved from bench to bedside. From the Clinical Editor: Cancer is a leading cause of mortality worldwide and finding a cure remains the holy-grail for many researchers and clinicians. The advance in nanotechnology has enabled novel strategies to develop in terms of cancer diagnosis and therapy. In this concise review article, the authors described current capabilities in this field and outlined comparisons with existing drugs. The difficulties in bringing new drugs to the clinics were also discussed.
Collapse
|
596
|
Jagodinsky JC, Sulima A, Cao Y, Poprawski JE, Blackman BN, Lloyd JR, Swenson RE, Gottesman MM, Hall MD. Evaluation of fluorophore-tethered platinum complexes to monitor the fate of cisplatin analogs. J Biol Inorg Chem 2015; 20:1081-95. [PMID: 26323351 DOI: 10.1007/s00775-015-1290-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Accepted: 08/01/2015] [Indexed: 12/28/2022]
Abstract
The platinum drugs cisplatin, carboplatin, and oxaliplatin are highly utilized in the clinic and as a consequence have been extensively studied in the laboratory setting, sometimes by generating fluorophore-tagged analogs. Here, we synthesized two Pt(II) complexes containing ethane-1,2-diamine ligands linked to a BODIPY fluorophore, and compared their biological activity with previously reported Pt(II) complexes conjugated to carboxyfluorescein and carboxyfluorescein diacetate. The cytotoxicity and DNA damage capacity of Pt-fluorophore complexes was compared to cisplatin, and the Pt-BODIPY complexes were found to be more cytotoxic with reduced cytotoxicity in cisplatin-resistant cells. Microscopy revealed a predominately cytosolic localization, with nuclear distribution at higher concentrations. Spheroids grown from parent and resistant cells revealed penetration of Pt-BODIPY into spheroids, and retention of the cisplatin-resistant spheroid phenotype. While most activity profiles were retained for the Pt-BODIPY complexes, accumulation in resistant cells was only slightly affected, suggesting that some aspects of Pt-fluorophore cellular pharmacology deviate from cisplatin.
Collapse
Affiliation(s)
- Justin C Jagodinsky
- Laboratory of Cell Biology, National Cancer Institute, Center for Cancer Research, National Institutes of Health, 37 Convent Drive, Rm. 2108, Bethesda, MD, 20892, USA
| | - Agnieszka Sulima
- Imaging Probe Development Center, National Institutes of Health, Rockville, MD, USA
| | - Yiqi Cao
- Laboratory of Cell Biology, National Cancer Institute, Center for Cancer Research, National Institutes of Health, 37 Convent Drive, Rm. 2108, Bethesda, MD, 20892, USA
| | - Joanna E Poprawski
- Laboratory of Cell Biology, National Cancer Institute, Center for Cancer Research, National Institutes of Health, 37 Convent Drive, Rm. 2108, Bethesda, MD, 20892, USA
| | - Burchelle N Blackman
- Imaging Probe Development Center, National Institutes of Health, Rockville, MD, USA
| | - John R Lloyd
- Advanced Mass Spectrometry Facility, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Rolf E Swenson
- Imaging Probe Development Center, National Institutes of Health, Rockville, MD, USA
| | - Michael M Gottesman
- Laboratory of Cell Biology, National Cancer Institute, Center for Cancer Research, National Institutes of Health, 37 Convent Drive, Rm. 2108, Bethesda, MD, 20892, USA.
| | - Matthew D Hall
- Laboratory of Cell Biology, National Cancer Institute, Center for Cancer Research, National Institutes of Health, 37 Convent Drive, Rm. 2108, Bethesda, MD, 20892, USA
| |
Collapse
|
597
|
Tan LH, Sykes PH, Alkaisi MM, Evans JJ. The characteristics of Ishikawa endometrial cancer cells are modified by substrate topography with cell-like features and the polymer surface. Int J Nanomedicine 2015; 10:4883-95. [PMID: 26346435 PMCID: PMC4531047 DOI: 10.2147/ijn.s86336] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Conventional in vitro culture studies on flat surfaces do not reproduce tissue environments, which have inherent topographical mechanical signals. To understand the impact of these mechanical signals better, we use a cell imprinting technique to replicate cell features onto hard polymer culture surfaces as an alternative platform for investigating biomechanical effects on cells; the high-resolution replication of cells offers the micro- and nanotopography experienced in typical cell–cell interactions. We call this platform a Bioimprint. Cells of an endometrial adenocarcinoma cell line, Ishikawa, were cultured on a bioimprinted substrate, in which Ishikawa cells were replicated on polymethacrylate (pMA) and polystyrene (pST), and compared to cells cultured on flat surfaces. Characteristics of cells, incorporating morphology and cell responses, including expression of adhesion-associated molecules and cell proliferation, were studied. In this project, we fabricated two different topographies for the cells to grow on: a negative imprint that creates cell-shaped hollows and a positive imprint that recreates the raised surface topography of a cell layer. We used two different substrate materials, pMA and pST. We observed that cells on imprinted substrates of both polymers, compared to cells on flat surfaces, exhibited higher expression of β1-integrin, focal adhesion kinase, and cytokeratin-18. Compared to cells on flat surfaces, cells were larger on imprinted pMA and more in number, whereas on pST-imprinted surfaces, cells were smaller and fewer than those on a flat pST surface. This method, which provided substrates in vitro with cell-like features, enabled the study of effects of topographies that are similar to those experienced by cells in vivo. The observations establish that such a physical environment has an effect on cancer cell behavior independent of the characteristics of the substrate. The results support the concept that the physical topography of a cell’s environment may modulate crucial oncological signaling pathways; this suggests the possibility of cancer therapies that target pathways associated with the response to mechanical stimuli.
Collapse
Affiliation(s)
- Li Hui Tan
- Department of Obstetrics and Gynaecology, University of Otago, Christchurch, New Zealand ; MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington, New Zealand
| | - Peter H Sykes
- Department of Obstetrics and Gynaecology, University of Otago, Christchurch, New Zealand
| | - Maan M Alkaisi
- MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington, New Zealand ; Department of Electrical and Computer Engineering, University of Canterbury, Christchurch, New Zealand
| | - John J Evans
- Department of Obstetrics and Gynaecology, University of Otago, Christchurch, New Zealand ; MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington, New Zealand ; Centre for Neuroendocrinology, University of Otago, Christchurch, New Zealand
| |
Collapse
|
598
|
Kretschmer I, Freudenberger T, Twarock S, Fischer JW. Synergistic effect of targeting the epidermal growth factor receptor and hyaluronan synthesis in oesophageal squamous cell carcinoma cells. Br J Pharmacol 2015; 172:4560-4574. [PMID: 26140525 DOI: 10.1111/bph.13240] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Revised: 06/05/2015] [Accepted: 06/26/2015] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND AND PURPOSE Worldwide, oesophageal cancer is the eighth most common cancer and has a very poor survival rate. In order to identify new tolerable treatment options for oesophageal squamous cell carcinoma (ESCC), erlotinib was tested with moderate efficacy in phase I and II studies. As 4-methylumbelliferone (4-MU), an hyaluronan (HA) synthesis inhibitor showed anti-cancer effects in vitro, and in ESCC xenograft tumours, we investigated whether the anti-cancer effects of erlotinib could be augmented by combining it with 4-MU. EXPERIMENTAL APPROACH ESCC cell lines were treated with erlotinib or gefitinib (1 μmol·L-1 ) and 4-MU (300 μmol·L-1 ), and the cell count, cell cycle progression and migration were determined as compared to the single agents and the solvent-control. KEY RESULTS The combination of erlotinib and 4-MU synergistically inhibited the proliferation of ESCC cell lines. Furthermore, the migration speed of ESCC cell line KYSE-410 in gap closure assays was significantly reduced by the combination of erlotinib and 4-MU. Decreased ERK phosphorylation could explain the anti-proliferative and anti-migratory effects in the combined treatment group. Finally, the combination was additionally able to decrease the growth of multicellular tumour spheroids, a three-dimensional cell culture model that was associated with sustained inhibition of ERK1/2 phosphorylation. CONCLUSIONS AND IMPLICATIONS The combination of 4-MU and erlotinib showed promising anti-cancer efficacies in the ESCC cell lines.
Collapse
Affiliation(s)
- I Kretschmer
- Institut für Pharmakologie und Klinische Pharmakologie, Universitätsklinikum der Heinrich-Heine-Universität, Düsseldorf, Germany
| | - T Freudenberger
- Institut für Pharmakologie und Klinische Pharmakologie, Universitätsklinikum der Heinrich-Heine-Universität, Düsseldorf, Germany
| | - S Twarock
- Institut für Pharmakologie und Klinische Pharmakologie, Universitätsklinikum der Heinrich-Heine-Universität, Düsseldorf, Germany
| | - J W Fischer
- Institut für Pharmakologie und Klinische Pharmakologie, Universitätsklinikum der Heinrich-Heine-Universität, Düsseldorf, Germany
| |
Collapse
|
599
|
Lee SH, Hong JH, Park HK, Park JS, Kim BK, Lee JY, Jeong JY, Yoon GS, Inoue M, Choi GS, Lee IK. Colorectal cancer-derived tumor spheroids retain the characteristics of original tumors. Cancer Lett 2015; 367:34-42. [PMID: 26185002 DOI: 10.1016/j.canlet.2015.06.024] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Revised: 06/25/2015] [Accepted: 06/25/2015] [Indexed: 02/07/2023]
Abstract
Primary cultures of cancer cells are useful for developing personalized medicine. In this study, we characterized three lines of three-dimensional (3D) tumor spheroids established directly from tumor tissues of patients with colorectal cancers (CRCs). Each line mainly included EpCAM-positive cells and cells expressing putative cancer stem cell markers such as CD133, CD44, CD24, ALDH1, and LGR5. These characteristic stem cell markers remained identically for months in vitro. Short tandem repeat genotyping suggested that genetic fingerprints of these tumor spheroids were similar to those of the original tumor tissues from which they were derived. Mutational analysis showed that each line had the same mutation profile for APC, KRAS, MLH1, serine-threonine kinase 11, and TP53 as its parental tumor tissue. One line harboring an activating KRAS mutation was resistant to cetuximab while the remaining two lines harboring wild-type KRAS showed different responses to cetuximab. Immunohistochemical analysis showed that xenograft tumors derived from these lines retained the histopathological and mutational patterns of their parental tumors. Collectively, these results clearly showed that 3D tumor spheroids directly generated from tumor tissues of patients with CRCs preserved the characteristics of their parental tumor tissues and could be used for developing personalized medicines for CRCs.
Collapse
Affiliation(s)
- Sun-Hwa Lee
- New Drug Development Center, Daegu-Gyungbuk Medical Innovation Foundation, Daegu, Republic of Korea
| | - Jun Hwa Hong
- Leading-Edge Research Center for Drug Discovery and Development for Diabetes and Metabolic Disease, Kyungpook National University Medical Center, Daegu, Republic of Korea; Department of Internal Medicine, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Hwan Ki Park
- Leading-Edge Research Center for Drug Discovery and Development for Diabetes and Metabolic Disease, Kyungpook National University Medical Center, Daegu, Republic of Korea
| | - Jun Seok Park
- Colorectal Cancer Center, Kyungpook National University Medical Center, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Bo-Kyung Kim
- Leading-Edge Research Center for Drug Discovery and Development for Diabetes and Metabolic Disease, Kyungpook National University Medical Center, Daegu, Republic of Korea
| | - Jung-Yi Lee
- Leading-Edge Research Center for Drug Discovery and Development for Diabetes and Metabolic Disease, Kyungpook National University Medical Center, Daegu, Republic of Korea
| | - Ji Yun Jeong
- Department of Pathology, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Ghil Suk Yoon
- Department of Pathology, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Masahiro Inoue
- Department of Biochemistry, Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan
| | - Gyu-Seog Choi
- Colorectal Cancer Center, Kyungpook National University Medical Center, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.
| | - In-Kyu Lee
- Leading-Edge Research Center for Drug Discovery and Development for Diabetes and Metabolic Disease, Kyungpook National University Medical Center, Daegu, Republic of Korea; Department of Internal Medicine, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.
| |
Collapse
|
600
|
Mahidhara G, Kanwar RK, Roy K, Kanwar JR. Oral administration of iron-saturated bovine lactoferrin-loaded ceramic nanocapsules for breast cancer therapy and influence on iron and calcium metabolism. Int J Nanomedicine 2015; 10:4081-98. [PMID: 26124661 PMCID: PMC4482373 DOI: 10.2147/ijn.s75877] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
We determined the anticancer efficacy and internalization mechanism of our polymeric-ceramic nanoparticle system (calcium phosphate nanocores, enclosed in biodegradable polymers chitosan and alginate nanocapsules/nanocarriers [ACSC NCs]) loaded with iron-saturated bovine lactoferrin (Fe-bLf) in a breast cancer xenograft model. ACSC-Fe-bLf NCs with an overall size of 322±27.2 nm were synthesized. In vitro internalization and anticancer efficacy were evaluated in the MDA-MB-231 cells using multicellular tumor spheroids, CyQUANT and MTT assays. These NCs were orally delivered in a breast cancer xenograft mice model, and their internalization, cytotoxicity, biodistribution, and anticancer efficacy were evaluated. Chitosan-coated calcium phosphate Fe-bLf NCs effectively (59%, P≤0.005) internalized in a 1-hour period using clathrin-mediated endocytosis (P≤0.05) and energy-mediated pathways (P≤0.05) for internalization; 3.3 mg/mL of ACSC-Fe-bLf NCs completely disintegrated (~130-fold reduction, P≤0.0005) the tumor spheroids in 72 hours and 96 hours. The IC50 values determined for ACSC-Fe-bLf NCs were 1.69 mg/mL at 10 hours and 1.62 mg/mL after 20 hours. We found that Fe-bLf-NCs effectively (P≤0.05) decreased the tumor size (4.8-fold) compared to the void NCs diet and prevented tumor recurrence when compared to intraperitoneal injection of Taxol and Doxorubicin. Receptor gene expression and micro-RNA analysis confirmed upregulation of low-density lipoprotein receptor and transferrin receptor (liver, intestine, and brain). Several micro-RNAs responsible for iron metabolism upregulated with NCs were identified. Taken together, orally delivered Fe-bLf NCs offer enhanced antitumor activity in breast cancer by internalizing via low-density lipoprotein receptor and transferrin receptor and regulating the micro-RNA expression. These NCs also restored the body iron and calcium levels and increased the hematologic counts.
Collapse
Affiliation(s)
- Ganesh Mahidhara
- Nanomedicine-Laboratory of Immunology and Molecular Biomedical Research, School of Medicine, Molecular and Medical Research Strategic Research Centre, Faculty of Health, Deakin University, Waurn Ponds, VIC, Australia
| | - Rupinder K Kanwar
- Nanomedicine-Laboratory of Immunology and Molecular Biomedical Research, School of Medicine, Molecular and Medical Research Strategic Research Centre, Faculty of Health, Deakin University, Waurn Ponds, VIC, Australia
| | - Kislay Roy
- Nanomedicine-Laboratory of Immunology and Molecular Biomedical Research, School of Medicine, Molecular and Medical Research Strategic Research Centre, Faculty of Health, Deakin University, Waurn Ponds, VIC, Australia
| | - Jagat R Kanwar
- Nanomedicine-Laboratory of Immunology and Molecular Biomedical Research, School of Medicine, Molecular and Medical Research Strategic Research Centre, Faculty of Health, Deakin University, Waurn Ponds, VIC, Australia
| |
Collapse
|