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Vazaios K, Stavrakaki Ε, Vogelezang LB, Ju J, Waranecki P, Metselaar DS, Meel MH, Kemp V, van den Hoogen BG, Hoeben RC, Chiocca EA, Goins WF, Stubbs A, Li Y, Alonso MM, Calkoen FG, Hulleman E, van der Lugt J, Lamfers ML. The heterogeneous sensitivity of pediatric brain tumors to different oncolytic viruses is predicted by unique gene expression profiles. Mol Ther Oncol 2024; 32:200804. [PMID: 38694569 PMCID: PMC11060958 DOI: 10.1016/j.omton.2024.200804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 04/11/2024] [Indexed: 05/04/2024]
Abstract
Despite decades of research, the prognosis of high-grade pediatric brain tumors (PBTs) remains dismal; however, recent cases of favorable clinical responses were documented in clinical trials using oncolytic viruses (OVs). In the current study, we employed four different species of OVs: adenovirus Delta24-RGD, herpes simplex virus rQNestin34.5v1, reovirus R124, and the non-virulent Newcastle disease virus rNDV-F0-GFP against three entities of PBTs (high-grade gliomas, atypical teratoid/rhabdoid tumors, and ependymomas) to determine their in vitro efficacy. These four OVs were screened on 14 patient-derived PBT cell cultures and the degree of oncolysis was assessed using an ATP-based assay. Subsequently, the observed viral efficacies were correlated to whole transcriptome data and Gene Ontology analysis was performed. Although no significant tumor type-specific OV efficacy was observed, the analysis revealed the intrinsic biological processes that associated with OV efficacy. The predictive power of the identified expression profiles was further validated in vitro by screening additional PBTs. In summary, our results demonstrate OV susceptibility of multiple patient-derived PBT entities and the ability to predict in vitro responses to OVs using unique expression profiles. Such profiles may hold promise for future OV preselection with effective oncolytic potency in a specific tumor, therewith potentially improving OV responses.
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Affiliation(s)
- Konstantinos Vazaios
- Princess Máxima Center for Pediatric Oncology, Heidelberglaan 25, 3584 CS Utrecht, the Netherlands
- Department of Neurosurgery, Brain Tumor Center, Erasmus Medical Center, Dr. Molewaterplein 40, 3015 GD Rotterdam, the Netherlands
- Center for Translational Immunology, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, the Netherlands
| | - Εftychia Stavrakaki
- Department of Neurosurgery, Brain Tumor Center, Erasmus Medical Center, Dr. Molewaterplein 40, 3015 GD Rotterdam, the Netherlands
| | - Lisette B. Vogelezang
- Department of Neurosurgery, Brain Tumor Center, Erasmus Medical Center, Dr. Molewaterplein 40, 3015 GD Rotterdam, the Netherlands
| | - Jie Ju
- Department of Pathology and Clinical Bioinformatics, Erasmus Medical Center, Dr. Molewaterplein 40, 3015 GD Rotterdam, the Netherlands
| | - Piotr Waranecki
- Princess Máxima Center for Pediatric Oncology, Heidelberglaan 25, 3584 CS Utrecht, the Netherlands
| | - Dennis S. Metselaar
- Princess Máxima Center for Pediatric Oncology, Heidelberglaan 25, 3584 CS Utrecht, the Netherlands
| | - Michaël H. Meel
- Princess Máxima Center for Pediatric Oncology, Heidelberglaan 25, 3584 CS Utrecht, the Netherlands
- Department of Pediatrics, Wilhelmina Children’s Hospital, University Medical Center Utrecht, Lundlaan 6, 3584 EA Utrecht, the Netherlands
| | - Vera Kemp
- Department of Cell and Chemical Biology, Leiden University Medical Center, Einthovenweg 20, 2333 ZC Leiden, the Netherlands
| | | | - Rob C. Hoeben
- Department of Cell and Chemical Biology, Leiden University Medical Center, Einthovenweg 20, 2333 ZC Leiden, the Netherlands
| | - E. Antonio Chiocca
- Department of Neurosurgery, Brigham and Women’s Hospital, Harvard Medical School, 75 Francis Street, Boston, MA 02115, USA
| | - William F. Goins
- Department of Microbiology & Molecular Genetics, University of Pittsburgh School of Medicine, 450 Technology Dr, Pittsburgh, PA 15219, USA
| | - Andrew Stubbs
- Department of Pathology and Clinical Bioinformatics, Erasmus Medical Center, Dr. Molewaterplein 40, 3015 GD Rotterdam, the Netherlands
| | - Yunlei Li
- Department of Pathology and Clinical Bioinformatics, Erasmus Medical Center, Dr. Molewaterplein 40, 3015 GD Rotterdam, the Netherlands
| | - Marta M. Alonso
- Program in Solid Tumors, Center for Applied Medical Research (CIMA), Avda. de Pío XII, 55, 31008 Pamplona, Spain
- Department of Pediatrics, Clínica Universidad de Navarra, Av. de Pío XII, 36, 31008 Pamplona, Spain
- Health Research Institute of Navarra (IDISNA), Av. de Pío XII, 36, 31008 Pamplona, Spain
| | - Friso G. Calkoen
- Princess Máxima Center for Pediatric Oncology, Heidelberglaan 25, 3584 CS Utrecht, the Netherlands
| | - Esther Hulleman
- Princess Máxima Center for Pediatric Oncology, Heidelberglaan 25, 3584 CS Utrecht, the Netherlands
| | - Jasper van der Lugt
- Princess Máxima Center for Pediatric Oncology, Heidelberglaan 25, 3584 CS Utrecht, the Netherlands
| | - Martine L.M. Lamfers
- Department of Neurosurgery, Brain Tumor Center, Erasmus Medical Center, Dr. Molewaterplein 40, 3015 GD Rotterdam, the Netherlands
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El Hammadi N, Almajano MP, Pastor MV, Codina-Torrella I. Evaluating the Incorporation of Myrtus communis L. Leaves Infusion in Alginate-Based Films and Spheres to Enhance the Oxidative Stability of Oil-in-Water Emulsions. Polymers (Basel) 2024; 16:649. [PMID: 38475332 DOI: 10.3390/polym16050649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 02/23/2024] [Accepted: 02/25/2024] [Indexed: 03/14/2024] Open
Abstract
Myrtus communis L. is a species of the Myrtaceae family that is found in the Mediterranean region, and it is traditionally recognized for its importance and different uses. The objective of this study was to determine the effect of M. communis L. leaf extract (MCLE), which was incorporated directly into alginate spheres and films, on preserving oil-in-water emulsions from oxidation. For this purpose, the solvent extraction (with ethanol at 40, 60, and 80%) of the antioxidant compounds was optimized (total phenolic compounds (TPCs) and total flavonoid content (TFC)) along with the scavenging activity. The best condition for the extraction corresponded with 60% ethanol (MCLE60), with a TPC of ~66.06 g GAE/L and a TFC of ~18.91 g QE/L, which was selected for use in the following assays. MCLE60 showed a considerable radical scavenging activity (24.85 mmol TE/L in FRAP, 28.75 mmol TE/L in DPPH, 30.61 mmol TE/L in ABTS, and 14.94 mmol TE/L in ORAC), which was probably due to its content in the phenolic compounds arbutin (122.08 mg/L), epicatechin (73.89 mg/L), sinapic acid (51.85 mg/L), and gallic acid (36.72 mg/L). The oil-in-water emulsions with the MCLE60 spheres showed the best oxidative stability (TBARS ~2.64 mg MDA/kg of emulsion, PV ~35.7 meq hydroperoxides/kg of emulsion) in comparison to the control. The film was also able to protect the emulsion from oxidation for more than a week at 30 °C (TBARS ~1.9 mg MDA/kg of emulsion). The alginate films with MCLE60 presented an important release of phenolic compounds in water and acetic food simulants, while in both ethanol simulants, the release of TPC remained more stable over time. Thus, this study highlights the potential uses of MCLE as a natural ingredient for emulsion oxidative preservation and the production of alginate delivery systems (spheres and films).
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Affiliation(s)
- Nisserine El Hammadi
- Chemical Engineering Department, Universitat Politècnica de Catalunya, Av. Diagonal 647, 08028 Barcelona, Spain
| | - María Pilar Almajano
- Chemical Engineering Department, Universitat Politècnica de Catalunya, Av. Diagonal 647, 08028 Barcelona, Spain
| | - Maria Vicenta Pastor
- Chemical Engineering Department, Universitat Politècnica de Catalunya, Av. Diagonal 647, 08028 Barcelona, Spain
| | - Idoia Codina-Torrella
- Agri-Food Engineering and Biotechnology Department, Universitat Politècnica de Catalunya, Esteve Terrades 8, 08860 Castelldefels, Spain
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Rybkowska P, Radoszkiewicz K, Kawalec M, Dymkowska D, Zabłocka B, Zabłocki K, Sarnowska A. The Metabolic Changes between Monolayer (2D) and Three-Dimensional (3D) Culture Conditions in Human Mesenchymal Stem/Stromal Cells Derived from Adipose Tissue. Cells 2023; 12:cells12010178. [PMID: 36611971 PMCID: PMC9818744 DOI: 10.3390/cells12010178] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 12/22/2022] [Accepted: 12/30/2022] [Indexed: 01/03/2023] Open
Abstract
INTRODUCTION One of the key factors that may influence the therapeutic potential of mesenchymal stem/stromal cells (MSCs) is their metabolism. The switch between mitochondrial respiration and glycolysis can be affected by many factors, including the oxygen concentration and the spatial form of culture. This study compared the metabolic features of adipose-derived mesenchymal stem/stromal cells (ASCs) and dedifferentiated fat cells (DFATs) cultivated as monolayer or spheroid culture under 5% O2 concentration (physiological normoxia) and their impact on MSCs therapeutic abilities. RESULTS We observed that the cells cultured as spheroids had a slightly lower viability and a reduced proliferation rate but a higher expression of the stemness-related transcriptional factors compared to the cells cultured in monolayer. The three-dimensional culture form increased mtDNA content, oxygen consumption rate (OCR) and extracellular acidification rate (ECAR), especially in DFATs-3D population. The DFATs spheroids also demonstrated increased levels of Complex V proteins and higher rates of ATP production. Moreover, increased reactive oxygen species and lower intracellular lactic acid levels were also found in 3D culture. CONCLUSION Our results may suggest that metabolic reconfiguration accompanies the transition from 2D to 3D culture and the processes of both mitochondrial respiration and glycolysis become more active. Intensified metabolism might be associated with the increased demand for energy, which is needed to maintain the expression of pluripotency genes and stemness state.
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Affiliation(s)
- Paulina Rybkowska
- Translational Platform for Regenerative Medicine, Mossakowski Medical Research Institute, Polish Academy of Sciences, 02-106 Warsaw, Poland
| | - Klaudia Radoszkiewicz
- Translational Platform for Regenerative Medicine, Mossakowski Medical Research Institute, Polish Academy of Sciences, 02-106 Warsaw, Poland
| | - Maria Kawalec
- Molecular Biology Unit, Mossakowski Medical Research Institute, Polish Academy of Sciences, 02-106 Warsaw, Poland
| | - Dorota Dymkowska
- Laboratory of Cellular Metabolism, Nencki Institute of Experimental Biology, Polish Academy of Science, 02-093 Warsaw, Poland
| | - Barbara Zabłocka
- Molecular Biology Unit, Mossakowski Medical Research Institute, Polish Academy of Sciences, 02-106 Warsaw, Poland
| | - Krzysztof Zabłocki
- Laboratory of Cellular Metabolism, Nencki Institute of Experimental Biology, Polish Academy of Science, 02-093 Warsaw, Poland
| | - Anna Sarnowska
- Translational Platform for Regenerative Medicine, Mossakowski Medical Research Institute, Polish Academy of Sciences, 02-106 Warsaw, Poland
- Correspondence: ; Tel.: +48-22-608-6598
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Silva-Holguín PN, Ruíz-Baltazar ÁDJ, Medellín-Castillo NA, Labrada-Delgado GJ, Reyes-López SY. Synthesis and Characterization of α-Al 2O 3/Ba-β-Al 2O 3 Spheres for Cadmium Ions Removal from Aqueous Solutions. Materials (Basel) 2022; 15:6809. [PMID: 36234150 PMCID: PMC9571672 DOI: 10.3390/ma15196809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 09/12/2022] [Accepted: 09/13/2022] [Indexed: 06/16/2023]
Abstract
The search for adsorbent materials with a certain chemical inertness, mechanical resistance, and high adsorption capacity, as is the case with alumina, is carried out with structural or surface modifications with the addition of additives or metallic salts. This research shows the synthesis, characterization, phase evolution and Cd(II) adsorbent capacity of α-Al2O3/Ba-β-Al2O3 spheres obtained from α-Al2O3 nanopowders by the ion encapsulation method. The formation of the Ba-β-Al2O3 phase is manifested at 1500 °C according to the infrared spectrum by the appearance of bands corresponding to AlO4 bonds and the appearance of peaks corresponding to Ba-O bonds in Raman spectroscopy. XRD determined the presence of BaO·Al2O3 at 1000 °C and the formation of Ba-β-Al2O3 at 1600 °C. Scanning electron microscopy revealed the presence of spherical grains corresponding to α-Al2O3 and hexagonal plates corresponding to β-Al2O3 in the spheres treated at 1600 °C. The spheres obtained have dimensions of 4.65 ± 0.30 mm in diameter, weight of 43 ± 2 mg and a surface area of 0.66 m2/g. According to the curve of pH vs. zeta potential, the spheres have an acid character and a negative surface charge of -30 mV at pH 5. Through adsorption studies, an adsorbent capacity of Cd(II) of 59.97 mg/g (87 ppm Cd(II)) was determined at pH 5, and the data were fitted to the pseudo first order, pseudo second order and Freundlich models, with correlation factors of 0.993, 0.987 and 0.998, respectively.
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Affiliation(s)
- Pamela Nair Silva-Holguín
- Departamento de Ciencias Químico-Biológicas, Instituto de Ciencias Biomédicas, Universidad Autónoma de Ciudad Juárez, Envolvente del PRONAF y Estocolmo s/n, Ciudad Juárez 32300, Mexico
| | - Álvaro de Jesús Ruíz-Baltazar
- CONACYT-Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, Boulevard Juriquilla 3001, Santiago de Querétaro 76230, Mexico
| | - Nahum Andrés Medellín-Castillo
- Centro de Investigación y Estudios de Posgrado, Facultad de Ingeniería, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava No. 8, San Luis Potosí 78210, Mexico
| | | | - Simón Yobanny Reyes-López
- Departamento de Ciencias Químico-Biológicas, Instituto de Ciencias Biomédicas, Universidad Autónoma de Ciudad Juárez, Envolvente del PRONAF y Estocolmo s/n, Ciudad Juárez 32300, Mexico
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Borden M, Westerlund LE, Lovric V, Walsh W. Controlling the bone regeneration properties of bioactive glass: Effect of particle shape and size. J Biomed Mater Res B Appl Biomater 2021; 110:910-922. [PMID: 34936202 PMCID: PMC9305884 DOI: 10.1002/jbm.b.34971] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 11/02/2021] [Accepted: 11/13/2021] [Indexed: 11/24/2022]
Abstract
The ability of particulate bioactive glass to function as an effective bone graft material is directly related to its in vivo dissolution, ion release, and interparticle spacing (area associated with bone in‐growth). A spherical shape represents an optimal geometry to control bioactive glass bone formation properties. Spherical particles were fabricated from 45S5 bioactive glass with unimodal (90–180, 180–355, and 355–500 μm) and bimodal size ranges (180–355/355–500 and 90–180/355–500 μm). Particles were formed into bone graft putties and compared to a commercially available product composed of irregular 45S5 bioactive glass particles (32–710 μm). Scanning electron microscopy characterization of spherical particles showed a relatively uniform sphere shape and smooth surfaces. Irregular particles were characterized by random shapes with flat surfaces and sharp edges. X‐ray fluorescence and X‐ray diffraction indicated that the spheroidization process maintained the properties of 45S5 bioactive glass. Cross‐sectional micro‐computed tomography imaging of the putty samples demonstrated that smaller spheres and irregular particles resulted denser packing patterns compared to the larger spheres. Isolated particles were immersed in simulated body fluid for 14 days to measure silicon ion release and bioactivity. Inductively coupled plasma spectroscopy showed faster ion release from smaller particles due to increased surface area. Bioactivity characterization of 14‐day simulated body fluid exposed particle surfaces showed the presence of a hydroxycarbanoapatite mineral layer (characteristic of 45S5 bioactive glass) on all bioactive glass particles. Results demonstrated that spherical particles maintained the properties of the starting 45S5 bioactive glass, and that particle shape and size directly affected short‐term glass dissolution, ion release, and interparticle spacing.
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Affiliation(s)
- Mark Borden
- Synergy Biomedical, Wayne, Pennsylvania, USA
| | | | - Vedran Lovric
- Surgical and Orthopedic Research Laboratories, Prince of Wales Clinical School, UNSW Sydney, Sydney, New South Wales, Australia
| | - William Walsh
- Surgical and Orthopedic Research Laboratories, Prince of Wales Clinical School, UNSW Sydney, Sydney, New South Wales, Australia
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Holland MR. Assessing the performance of ultrasound imaging systems using images from relatively high-density random spherical void phantoms: A simulation study. Med Phys 2021; 49:878-890. [PMID: 34894402 DOI: 10.1002/mp.15405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND The development of clinically meaningful, objective, and quantitative methods for assessing the performance of ultrasound imaging systems represents a continuing area of interest. One approach has been to image phantoms with randomly distributed spherical voids. PURPOSE The objectives of this study were: (1) to explore the potential of using relatively high-volume fraction random spherical void (RSV) phantoms as an approach for quantitatively assessing the performance of ultrasound imaging systems; (2) to identify potential metrics that can be used to provide quantitative assessments of images obtained from relatively high-volume fraction RSV phantoms; and (3) to demonstrate changes in the quantitative metrics that can occur as image features are degraded. METHODS A series (10 each) of computer-simulated RSV phantoms with a range of RSV volume fractions (0.05, 0.15, and 0.25) were generated. To determine the number of image planes necessary to provide robust measurements, a series of consecutive planes (ranging from 1 to 150) within each type of simulated phantom were analyzed. The observed circular cross-section radii histogram distributions (representing the intersection of each plane with the local distribution of spherical voids) were compared with the theoretical histogram distribution. Simulated phantom images were produced by adding speckle and degradation of imaging system performance was modeled by averaging 1 to 9 neighboring planes to represent increasing elevation plane thicknesses. Quantification of the performance of the imaging system was determined by measuring the: (1) mean number of circular cross-sections detected per image frame; (2) mean fractional area of circular cross-sections detected per image frame; (3) agreement of observed circular cross-section radii histogram distribution with the theoretical distribution (Chi-square statistic); and (4) contrast and contrast-to-noise ratio as a function of observed circular cross-section radius. RESULTS Results suggest that analyses of a sufficient number of image planes (providing over approximately 3000 total circular cross-sectional areas) provides excellent agreement between the observed and theoretical histogram distributions (mean Chi-square < 0.004). For the 0.15 volume fraction series of simulated RSV phantoms, using 150 image plane analyses, phantom images show decreasing mean number of circle cross-sections detected per frame (31.5 ± 0.3, 28.4 ± 0.3, 28.2 ± 0.3, 26.3 ± 0.3, and 25.3 ± 0.3); decreasing mean fractional area of circle cross-sections per frame (0.157 ± 0.002, 0.133 ± 0.001, 0.133 ± 0.001, 0.111 ± 0.001, and 0.108 ± 0.001); and a decreasing agreement with the theoretical histogram distribution of radii (Chi-square values: 0.070 ± 0.004, 0.140 ± 0.005, 0.149 ± 0.007, 0.379 ± 0.011, and 0.518 ± 0.010) for 1, 3, 5, 7, and 9 plane averages, respectively. Contrast and contrast-to-noise measurements as a function of observed circular cross-section radius also demonstrate marked changes with simulated image degradation. CONCLUSIONS Results of this simulation study suggest that analyses of images obtained from relatively high-density RSV phantoms may offer a promising approach for assessing ultrasound imaging systems. The proposed measurements appear to provide reproducible, robust, quantitative metrics that can be compared with corresponding theoretical values to provide quantifiable, objective metrics of imaging system performance.
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Affiliation(s)
- Mark R Holland
- Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, Indiana, USA
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de Sá MD, de Lima Souza JW, da Silva HN, Torres RHN, Leite MDR, Barbosa RC, Leite IF, Pimentel CA, Fook MVL. Biocompatible Sulphonated PEEK Spheres: Influence of Processing Conditions on Morphology and Swelling Behavior. Polymers (Basel) 2021; 13:polym13172920. [PMID: 34502960 PMCID: PMC8434384 DOI: 10.3390/polym13172920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 05/24/2021] [Accepted: 05/24/2021] [Indexed: 11/16/2022] Open
Abstract
This work aimed to develop and evaluate the influence of processing variables on the morphology and swelling of sulfonated poly(ether ether ketone) (SPEEK) spheres for possible applications as a biomaterial. We used the drip method to obtain spheres with the polymer starting solutions SPEEK-6 (w/v: 6%) and SPEEK-10 (w/v: 10%), drip rates (20 and 30 mL/h), and drip heights (5 and 10 cm) in experimental planning. The samples were characterized by Fourier-transform infrared spectroscopy (FTIR), optical microscopy (OM), the absorption capacity of phosphate-buffered saline (PBS) by swelling (%), and statistical analysis of data through Design of Experiments (DOE). The obtained results evidenced that the processing variables influenced the morphology and swelling. Spheres with a bigger concentration of the polymer solution presented a greater degree of sulfonation (DS). We verified that the diameter of the spheres was directly related to the variable height and the sphericity was associated with the speed and viscosity of the solution. Bigger and more pores in a greater amount were observed in the spheres with a greater DS, influencing the behavior of the swelling in PBS. The better variable combinations with a high DS, regular sphericity, a smaller diameter, and greater swelling were the samples S2-10-20-5 e S10-10-20-5. The cytotoxicity indicated that the best samples obtained in the experimental planning (S2-10-20-5 and S10-10-20-5) were not toxic. In that regard, the evaluated spheres presented cell viability and swelling capacity, suggesting their possible applications as biomaterials.
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Affiliation(s)
- Mayelli Dantas de Sá
- Postgraduate Program in Materials Science and Engineering, Department of Materials Engineering, Federal University of Campina Grande, Campina Grande, PB 58429-900, Brazil; (M.D.d.S.); (J.W.d.L.S.); (H.N.d.S.); (R.H.N.T.); (M.D.R.L.)
| | - José William de Lima Souza
- Postgraduate Program in Materials Science and Engineering, Department of Materials Engineering, Federal University of Campina Grande, Campina Grande, PB 58429-900, Brazil; (M.D.d.S.); (J.W.d.L.S.); (H.N.d.S.); (R.H.N.T.); (M.D.R.L.)
| | - Henrique Nunes da Silva
- Postgraduate Program in Materials Science and Engineering, Department of Materials Engineering, Federal University of Campina Grande, Campina Grande, PB 58429-900, Brazil; (M.D.d.S.); (J.W.d.L.S.); (H.N.d.S.); (R.H.N.T.); (M.D.R.L.)
| | - Rodolfo Henrique Nogueira Torres
- Postgraduate Program in Materials Science and Engineering, Department of Materials Engineering, Federal University of Campina Grande, Campina Grande, PB 58429-900, Brazil; (M.D.d.S.); (J.W.d.L.S.); (H.N.d.S.); (R.H.N.T.); (M.D.R.L.)
| | - Michele Dayane Rodrigues Leite
- Postgraduate Program in Materials Science and Engineering, Department of Materials Engineering, Federal University of Campina Grande, Campina Grande, PB 58429-900, Brazil; (M.D.d.S.); (J.W.d.L.S.); (H.N.d.S.); (R.H.N.T.); (M.D.R.L.)
| | - Rossemberg Cardoso Barbosa
- Department of Materials Engineering, Federal University of Campina Grande, Campina Grande, PB 58429-900, Brazil;
| | - Itamara Farias Leite
- Department of Materials Engineering, Federal University of Paraíba, João Pessoa, PB 58051-900, Brazil;
| | - Cristiane Agra Pimentel
- Department of Production Engineering, Federal University of Recôncavo da Bahia, Feira de Santana, BA 44380-000, Brazil;
| | - Marcus Vinicius Lia Fook
- Department of Materials Engineering, Federal University of Campina Grande, Campina Grande, PB 58429-900, Brazil;
- Correspondence: ; Tel.: +55-(83)-2101-1841
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Valente S, Ciavarella C, Hernández-Aguilera A, Salvador FA, Buzzi M, Joven J, Pasquinelli G. Phenotypic, morphological, and metabolic characterization of vascular- spheres from human vascular mesenchymal stem cells. Microsc Res Tech 2021; 85:447-459. [PMID: 34448515 PMCID: PMC9290655 DOI: 10.1002/jemt.23918] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 07/15/2021] [Accepted: 07/31/2021] [Indexed: 01/01/2023]
Abstract
The ability to form spheroids under non‐adherent conditions is a well‐known property of human mesenchymal stem cells (hMSCs), in addition to stemness and multilineage differentiation features. In the present study, we tested the ability of hMSCs isolated from the vascular wall (hVW‐MSCs) to grow as spheres, and provide a characterization of this 3D model. hVW‐MSCs were isolated from femoral arteries through enzymatic digestion. Spheres were obtained using ultra‐low attachment and hanging drop methods. Immunophenotype and pluripotent genes (SOX‐2, OCT‐4, NANOG) were analyzed by immunocytochemistry and real‐time PCR, respectively. Spheres histological and ultrastructural architecture were examined. Cell viability and proliferative capacity were measured using LIVE/DEATH assay and ki‐67 proliferation marker. Metabolomic profile was obtained with liquid chromatography–mass spectrometry. In 2D, hVW‐MSCs were spindle‐shaped, expressed mesenchymal antigens, and displayed mesengenic potential. 3D cultures of hVW‐MSCs were CD44+, CD105low, CD90low, exhibited a low propensity to enter the cell cycle as indicated by low percentage of ki‐67 expression and accumulated intermediate metabolites pointing to slowed metabolism. The 3D model of hVW‐MSCs exhibits stemness, dormancy and slow metabolism, typically observed in stem cell niches. This culture strategy can represent an accurate model to investigate hMSCs features for future clinical applications in the vascular field.
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Affiliation(s)
- Sabrina Valente
- DIMES - Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy
| | - Carmen Ciavarella
- DIMES - Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy
| | - Anna Hernández-Aguilera
- Unitat de Recerca Biomèdica, Hospital Universitari de Sant Joan, IISPV, Universitat Rovira i Virgili, Reus, Spain.,Campus of International Excellence Southern Catalonia, Tarragona, Spain
| | - Fernández-Arroyo Salvador
- Unitat de Recerca Biomèdica, Hospital Universitari de Sant Joan, IISPV, Universitat Rovira i Virgili, Reus, Spain.,Campus of International Excellence Southern Catalonia, Tarragona, Spain
| | - Marina Buzzi
- Emilia Romagna Cord Blood Bank - Transfusion Service, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - Jorge Joven
- Unitat de Recerca Biomèdica, Hospital Universitari de Sant Joan, IISPV, Universitat Rovira i Virgili, Reus, Spain.,Campus of International Excellence Southern Catalonia, Tarragona, Spain
| | - Gianandrea Pasquinelli
- DIMES - Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy.,Subcellular Nephro-Vascular Diagnostic Program, Pathology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
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Zamora Lagos SI, Murillo Salas J, Valencia Zapata ME, Mina Hernández JH, Grande Tovar CD. Optimization by Central Composite Experimental Design of the Synthesis of Physically Crosslinked Chitosan Spheres. Biomimetics (Basel) 2020; 5:E63. [PMID: 33233785 PMCID: PMC7709620 DOI: 10.3390/biomimetics5040063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 10/29/2020] [Accepted: 11/16/2020] [Indexed: 11/17/2022] Open
Abstract
Chitosan (CS) has special properties such as biocompatibility, biodegradability, antibacterial, and biological activity which make this material is currently studied in various applications, including tissue engineering. There are different methods to modify the morphology of CS. Most use chemical crosslinking agents, however, those methods have disadvantages such as low polymer degradability and unwanted side effects. The objective of this research was to obtain CS spheres through the physical crosslinking of commercial CS without using crosslinking agents through a simple coacervation method. A central composite experimental design was used to optimize the synthesis of the CS spheres and by the response surface methodology it was possible to obtain CS spheres with the smallest diameter and the most regular morphology. With the optimal formulation (CS solution 1.8% (w/v), acetic acid (AAC) solution 1% (w/v), sodium hydroxide (NaOH) solution 13% (w/v), relative humidity of (10%) and needle diameter of 0.6 mm), a final sphere diameter of 1 mm was obtained. Spheres were characterized by physical, chemical, thermal, and biological properties in simulated body fluid (SBF). The results obtained allowed us to understand the effect of the studied variables on the spheres' diameter. An optimized condition facilitated the change in the morphology of the CS while maintaining its desirable properties for use in tissue engineering.
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Affiliation(s)
- Sara Isabel Zamora Lagos
- Escuela de Ingeniería de Materiales, Facultad de Ingeniería, Universidad del Valle, Calle 13 No. 100-00, Santiago de Cali 760032, Colombia; (S.I.Z.L.); (J.M.S.); (M.E.V.Z.); (J.H.M.H.)
| | - Jefferson Murillo Salas
- Escuela de Ingeniería de Materiales, Facultad de Ingeniería, Universidad del Valle, Calle 13 No. 100-00, Santiago de Cali 760032, Colombia; (S.I.Z.L.); (J.M.S.); (M.E.V.Z.); (J.H.M.H.)
| | - Mayra Eliana Valencia Zapata
- Escuela de Ingeniería de Materiales, Facultad de Ingeniería, Universidad del Valle, Calle 13 No. 100-00, Santiago de Cali 760032, Colombia; (S.I.Z.L.); (J.M.S.); (M.E.V.Z.); (J.H.M.H.)
| | - José Herminsul Mina Hernández
- Escuela de Ingeniería de Materiales, Facultad de Ingeniería, Universidad del Valle, Calle 13 No. 100-00, Santiago de Cali 760032, Colombia; (S.I.Z.L.); (J.M.S.); (M.E.V.Z.); (J.H.M.H.)
| | - Carlos David Grande Tovar
- Programa de Química, Facultad de Ciencias, Universidad del Atlántico, Carrera 30 número 8-49, Puerto Colombia 081008, Colombia
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Hidalgo M, Diaz-Jimenez M, Consuegra C, Pereira B, Dorado J. Vitrification of Donkey Sperm: Is It Better Using Permeable Cryoprotectants? Animals (Basel) 2020; 10:ani10091462. [PMID: 32825370 PMCID: PMC7552618 DOI: 10.3390/ani10091462] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 08/13/2020] [Accepted: 08/17/2020] [Indexed: 12/30/2022] Open
Abstract
Simple Summary Conventional donkey sperm-freezing using permeable cryoprotectants has been successfully performed, and good sperm parameters have been obtained after thawing. Unfortunately, artificial insemination of jennies with cryopreserved semen has given unsatisfactory results. Vitrification by directly dropping the sperm into the liquid nitrogen following the spheres methodology has been developed in human beings as an alternative to conventional freezing. This technique has shown to be a species-specific methodology and the concentration of cryoprotectants should be optimized in donkeys. Additionally, in this study, a permeable cryoprotectant (glycerol) has been tested for the first time for donkey sperm vitrification. According to our findings, vitrification of donkey sperm was effectively carried out using an extender supplemented with sucrose or bovine serum albumin (BSA) as non-permeable agent. When glycerol, a permeable agent, was compared to sucrose 0.1 M and BSA 5%, sperm quality significantly decreased. Therefore, donkey sperm vitrification in the absence of permeable agents obtained better results and gives a new approach to create a pattern for future studies of fertility trials. Abstract Vitrification by direct exposure of sperm to liquid nitrogen is increasing in popularity as an alternative to conventional freezing. In this study, the effect of permeable cryoprotectant agents for donkey sperm vitrification was compared to an extender containing non-permeable cryoprotectants. First, three different concentrations of sucrose (0.1, 0.2, and 0.3 molar, M) and bovine serum albumin, BSA (1, 5, and 10%) were compared. Secondly, the concentration of non-permeable agents producing the most desirable results was compared to an extender containing glycerol as permeable agent. Vitrification was performed by dropping 30 μL of sperm suspension directly into LN2 and warming at 42 °C. Sperm motility (total, TM; and progressive, PM) and plasma membrane integrity, PMI (mean ± SEM) were statistically compared between treatments. Sucrose 0.1 M showed a significantly higher percentage of total sperm motility (21.67 ± 9.22%) than sucrose 0.2 M (14.16 ± 4.50%) and 0.3 M (8.58 ± 6.22%); and no differences were found in comparison to the control (19.71 ± 10.16%). Vitrification with sucrose 0.1 M or BSA 5% obtained similar results for TM (21.67 ± 9.22% vs. 19.93 ± 9.93%), PM (13.42 ± 6.85% vs. 12.54 ± 6.37%) and PMI (40.90 ± 13.51% vs. 37.09 ± 14.28); but both showed higher percentages than glycerol (TM = 9.71 ± 4.19%; PM = 5.47 ± 3.17%; PMI = 28.48 ± 15.55%). In conclusion, donkey sperm vitrification in spheres using non-permeable cryoprotectants exhibited better sperm motility and viability parameters after warming than sperm vitrification using extenders containing permeable cryoprotectants.
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Liu W, Zhang X, Wang Z, Wang R, Chen C, Dong C. Nanoparticles Assembled CdIn 2O 4 Spheres with High Sensing Properties towards n-Butanol. Nanomaterials (Basel) 2019; 9:E1714. [PMID: 31805720 PMCID: PMC6955898 DOI: 10.3390/nano9121714] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 11/25/2019] [Accepted: 11/28/2019] [Indexed: 11/21/2022]
Abstract
Cd/In-glycerate spheres are synthesized through a simple solvothermal method. After thermal treatment, these Cd/In-glycerates can be converted into CdIn2O4 spheres. Many characterization methods were performed to reveal the microstructure and morphology of the CdIn2O4. It was found that pure CdIn2O4 phase was obtained for the Cd/In starting materials at ratios of 1:1.6. The CdIn2O4 spheres are composed by a large number of nanoparticles subunits. The CdIn2O4 sphere-based sensor exhibited a low detection limit (1 ppm), high response (81.20 to 500 ppm n-butanol), fast response (4 s) and recovery (10 s) time, good selectivity, excellent repeatability, and stability at 280 °C. Our findings highlight the possibility to develop a novel gas sensor based on CdIn2O4 for application in n-butanol detection with high performance.
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Affiliation(s)
- Weiping Liu
- College of Instrumentation & Electrical Engineering, Key Laboratory of Geophysical Exploration Equipment, Ministry of Education of China, Jilin University, Changchun 130026, Jilin, China; (W.L.); (X.Z.); (Z.W.); (R.W.)
| | - Ximing Zhang
- College of Instrumentation & Electrical Engineering, Key Laboratory of Geophysical Exploration Equipment, Ministry of Education of China, Jilin University, Changchun 130026, Jilin, China; (W.L.); (X.Z.); (Z.W.); (R.W.)
| | - Zhaofeng Wang
- College of Instrumentation & Electrical Engineering, Key Laboratory of Geophysical Exploration Equipment, Ministry of Education of China, Jilin University, Changchun 130026, Jilin, China; (W.L.); (X.Z.); (Z.W.); (R.W.)
| | - Ruijian Wang
- College of Instrumentation & Electrical Engineering, Key Laboratory of Geophysical Exploration Equipment, Ministry of Education of China, Jilin University, Changchun 130026, Jilin, China; (W.L.); (X.Z.); (Z.W.); (R.W.)
| | - Chen Chen
- College of Instrumentation & Electrical Engineering, Key Laboratory of Geophysical Exploration Equipment, Ministry of Education of China, Jilin University, Changchun 130026, Jilin, China; (W.L.); (X.Z.); (Z.W.); (R.W.)
| | - Chengjun Dong
- School of Materials Science and Engineering, Yunnan University, Kunming 650091, Yunnan, China
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Makover V, Ronen Z, Lubin Y, Khalaila I. Eggshell spheres protect brown widow spider ( Latrodectus geometricus) eggs from bacterial infection. J R Soc Interface 2019; 16:20180581. [PMID: 30958158 DOI: 10.1098/rsif.2018.0581] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Eggs provide a rich source of nutrients for the developing embryo, making them a favoured food source for other organisms as well. Several defence mechanisms have evolved to protect the developing embryos against microbial threats. In this article, we elucidate the defence strategy of brown widow spider ( Latrodectus geometricus) eggs against bacteria. Antibacterial activity was shown by inhibition of bacterial growth on agar plate, liquid culture and retarded biofilm formation. The defence strategy against bacterial invasion was demonstrated in the whole egg, whole egg extract, egg surface extract, eggshell and eggshell extract. The source and characteristics of this antibacterial activity are distinctive and stem in part from a dense layer of spheres covering the egg surface, likely originated from the oviposition fluid. The spheres are rich in low-molecular-weight proteins, yet their exact composition remains unknown. In this study, we demonstrate that the egg surface is hydrophobic, while the spheres are superhydrophilic. Egg surface roughness and hydrophobicity combined with its antibacterial chemical properties reduce the ability of bacteria to grow on the egg surface. Understanding the properties of these unique structures may contribute significantly to our knowledge of how nature deals with bacterial infections.
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Affiliation(s)
- Vardit Makover
- 1 Department of Environmental Hydrology and Microbiology, Zuckerberg Institute for Water Research, Blaustein Institutes for Desert Research, Ben-Gurion University , Midreshet Ben-Gurion , Israel
| | - Zeev Ronen
- 1 Department of Environmental Hydrology and Microbiology, Zuckerberg Institute for Water Research, Blaustein Institutes for Desert Research, Ben-Gurion University , Midreshet Ben-Gurion , Israel
| | - Yael Lubin
- 2 Marco and Louise Mitrani Department of Desert Ecology, Blaustein Institutes for Desert Research, Ben-Gurion University , Midreshet Ben-Gurion , Israel
| | - Isam Khalaila
- 3 Avram and Stella Goldstein-Goren Department of Biotechnology Engineering, Ben-Gurion University , Beer Sheva , Israel
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Kucharczyk K, Weiss M, Jastrzebska K, Luczak M, Ptak A, Kozak M, Mackiewicz A, Dams-Kozlowska H. Bioengineering the spider silk sequence to modify its affinity for drugs. Int J Nanomedicine 2018; 13:4247-4261. [PMID: 30050299 PMCID: PMC6055833 DOI: 10.2147/ijn.s168081] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Silk is a biocompatible and biodegradable material, able to self-assemble into different morphological structures. Silk structures may be used for many biomedical applications, including carriers for drug delivery. The authors designed a new bioengineered spider silk protein, EMS2, and examined its property as a carrier of chemotherapeutics. MATERIALS AND METHODS To obtain EMS protein, the MS2 silk monomer (that was based on the MaSp2 spidroin of Nephila clavipes) was modified by the addition of a glutamic acid residue. Both bioengineered silks were produced in an Escherichia coli expression system and purified by thermal method. The silk spheres were produced by mixing with potassium phosphate buffer. The physical properties of the particles were characterized using scanning electron microscopy, atomic force microscopy, Fourier-transform infrared spectroscopy, and zeta potential measurements. The MTT assay was used to examine the cytotoxicity of spheres. The loading and release profiles of drugs were studied spectrophotometrically. RESULTS The bioengineered silk variant, EMS2, was constructed, produced, and purified. The EMS2 silk retained the self-assembly property and formed spheres. The spheres made of EMS2 and MS2 silks were not cytotoxic and had a similar secondary structure content but differed in morphology and zeta potential values; EMS2 particles were more negatively charged than MS2 particles. Independently of the loading method (pre- or post-loading), the loading of drugs into EMS2 spheres was more efficient than the loading into MS2 spheres. The advantageous loading efficiency and release rate made EMS2 spheres a good choice to deliver neutral etoposide (ETP). Despite the high loading efficiency of positively charged mitoxantrone (MTX) into EMS2 particles, the fast release rate made EMS2 unsuitable for the delivery of this drug. A faster release rate from EMS2 particles compared to MS2 particles was observed for positively charged doxorubicin (DOX). CONCLUSION By modifying its sequence, silk affinity for drugs can be controlled.
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Affiliation(s)
- Kamil Kucharczyk
- Department of Medical Biotechnology, Poznan University of Medical Sciences, Poznan, Poland,
- Department of Diagnostics and Cancer Immunology, Greater Poland Cancer Centre, Poznan, Poland,
| | - Marek Weiss
- Division of Computational Physics and Nanomechanics, Institute of Physics, Faculty of Technical Physics, Poznan University of Technology, Poznan, Poland
| | - Katarzyna Jastrzebska
- Department of Medical Biotechnology, Poznan University of Medical Sciences, Poznan, Poland,
- Department of Diagnostics and Cancer Immunology, Greater Poland Cancer Centre, Poznan, Poland,
| | - Magdalena Luczak
- Department of Biomedical Proteomics, Institute of Bioorganic Chemistry, Polish Academy of Sciences, Poznan, Poland
- Department of Organic Chemistry, Institute of Chemical Technology and Engineering, Poznan University of Technology, Poznan, Poland
| | - Arkadiusz Ptak
- Division of Computational Physics and Nanomechanics, Institute of Physics, Faculty of Technical Physics, Poznan University of Technology, Poznan, Poland
| | - Maciej Kozak
- Department of Macromolecular Physics, Adam Mickiewicz University, Poznan, Poland
- Joint Laboratory for SAXS Studies, Adam Mickiewicz University, Poznan, Poland
| | - Andrzej Mackiewicz
- Department of Medical Biotechnology, Poznan University of Medical Sciences, Poznan, Poland,
- Department of Diagnostics and Cancer Immunology, Greater Poland Cancer Centre, Poznan, Poland,
| | - Hanna Dams-Kozlowska
- Department of Medical Biotechnology, Poznan University of Medical Sciences, Poznan, Poland,
- Department of Diagnostics and Cancer Immunology, Greater Poland Cancer Centre, Poznan, Poland,
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Le Nail LR, Brennan M, Rosset P, Deschaseaux F, Piloquet P, Pichon O, Le Caignec C, Crenn V, Layrolle P, Hérault O, De Pinieux G, Trichet V. Comparison of Tumor- and Bone Marrow-Derived Mesenchymal Stromal/Stem Cells from Patients with High-Grade Osteosarcoma. Int J Mol Sci 2018; 19:E707. [PMID: 29494553 PMCID: PMC5877568 DOI: 10.3390/ijms19030707] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 02/10/2018] [Accepted: 02/12/2018] [Indexed: 01/09/2023] Open
Abstract
Osteosarcoma (OS) is suspected to originate from dysfunctional mesenchymal stromal/stem cells (MSC). We sought to identify OS-derived cells (OSDC) with potential cancer stem cell (CSC) properties by comparing OSDC to MSC derived from bone marrow of patients. This study included in vitro characterization with sphere forming assays, differentiation assays, cytogenetic analysis, and in vivo investigations of their tumorigenicity and tumor supportive capacities. Primary cell lines were isolated from nine high-grade OS samples. All primary cell lines demonstrated stromal cell characteristics. Compared to MSC, OSDC presented a higher ability to form sphere clones, indicating a potential CSC phenotype, and were more efficient at differentiation towards osteoblasts. None of the OSDC displayed the complex chromosome rearrangements typical of high grade OS and none of them induced tumors in immunodeficient mice. However, two OSDC demonstrated focused genomic abnormalities. Three out of seven, and six out of seven OSDC showed a supportive role on local tumor development, and on metastatic progression to the lungs, respectively, when co-injected with OS cells in nude mice. The observation of OS-associated stromal cells with rare genetic abnormalities and with the capacity to sustain tumor progression may have implications for future tumor treatments.
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Affiliation(s)
- Louis-Romée Le Nail
- Laboratoire d'étude des sarcomes osseux et remodelage des tissus calcifiés, INSERM UMR 1238, Université de Nantes, PhyOS, 44034 Nantes CEDEX 1, France.
- Centre Hospitalier Régional Universitaire de Tours, Service de Chirurgie Orthopédique 2, Faculté de Médecine de Tours, Université de Tours, 37044 CEDEX 9 Tours, France.
| | - Meadhbh Brennan
- Laboratoire d'étude des sarcomes osseux et remodelage des tissus calcifiés, INSERM UMR 1238, Université de Nantes, PhyOS, 44034 Nantes CEDEX 1, France.
- Harvard School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
| | - Philippe Rosset
- Laboratoire d'étude des sarcomes osseux et remodelage des tissus calcifiés, INSERM UMR 1238, Université de Nantes, PhyOS, 44034 Nantes CEDEX 1, France.
- Centre Hospitalier Régional Universitaire de Tours, Service de Chirurgie Orthopédique 2, Faculté de Médecine de Tours, Université de Tours, 37044 CEDEX 9 Tours, France.
| | - Frédéric Deschaseaux
- STROMA Lab, INSERM U1031, Etablissement Français du Sang Occitanie, Université de Toulouse, 31432 Toulouse, France.
| | - Philippe Piloquet
- Centre Hospitalier Universitaire de Nantes, Service de Génétique Médicale, Faculté de Médecine de Nantes, 44034 CEDEX 1 Nantes, France.
| | - Olivier Pichon
- Centre Hospitalier Universitaire de Nantes, Service de Génétique Médicale, Faculté de Médecine de Nantes, 44034 CEDEX 1 Nantes, France.
| | - Cédric Le Caignec
- Laboratoire d'étude des sarcomes osseux et remodelage des tissus calcifiés, INSERM UMR 1238, Université de Nantes, PhyOS, 44034 Nantes CEDEX 1, France.
- Centre Hospitalier Universitaire de Nantes, Service de Génétique Médicale, Faculté de Médecine de Nantes, 44034 CEDEX 1 Nantes, France.
| | - Vincent Crenn
- Laboratoire d'étude des sarcomes osseux et remodelage des tissus calcifiés, INSERM UMR 1238, Université de Nantes, PhyOS, 44034 Nantes CEDEX 1, France.
- Centre Hospitalier Universitaire de Nantes, Service de Chirurgie Orthopédique, Faculté de Médecine de Nantes, Université de Nantes, 44034 CEDEX 1 Nantes, France.
| | - Pierre Layrolle
- Laboratoire d'étude des sarcomes osseux et remodelage des tissus calcifiés, INSERM UMR 1238, Université de Nantes, PhyOS, 44034 Nantes CEDEX 1, France.
| | - Olivier Hérault
- Centre Hospitalier Régional Universitaire de Tours, Service d'Hématologie Biologique, 37044 CEDEX 9 Tours, France.
- National Center for Scientific Research (CNRS) GDR 3697, 75020 Paris, France.
- National Center for Scientific Research (CNRS) ERL 7001 LNOx, 37032 CEDEX 1 Tours, Université de Tours, 37044 Tours, France.
| | - Gonzague De Pinieux
- Laboratoire d'étude des sarcomes osseux et remodelage des tissus calcifiés, INSERM UMR 1238, Université de Nantes, PhyOS, 44034 Nantes CEDEX 1, France.
- Centre Hospitalier Régional Universitaire de Tours, Hôpital Trousseau, Service d'Anatomie Pathologique, Faculté de Médecine de Tours, Université de Tours, 37044 CEDEX 9 Tours, France.
| | - Valérie Trichet
- Laboratoire d'étude des sarcomes osseux et remodelage des tissus calcifiés, INSERM UMR 1238, Université de Nantes, PhyOS, 44034 Nantes CEDEX 1, France.
- National Center for Scientific Research (CNRS) GDR 3697, 75020 Paris, France.
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Jastrzebska K, Florczak A, Kucharczyk K, Lin Y, Wang Q, Mackiewicz A, Kaplan DL, Dams-Kozlowska H. Delivery of chemotherapeutics using spheres made of bioengineered spider silks derived from MaSp1 and MaSp2 proteins. Nanomedicine (Lond) 2018; 13:439-454. [PMID: 29338625 PMCID: PMC5810845 DOI: 10.2217/nnm-2017-0276] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 12/11/2017] [Indexed: 01/16/2023] Open
Abstract
AIM Analysis of the properties and chemotherapeutics delivery potential of spheres made of bioengineered spider silks MS1 and MS2. MATERIALS & METHODS MS1 and MS2 derived from Nephila clavipes dragline silks - MaSp1 and MaSp2, respectively - formed spheres that were compared in terms of physicochemical properties, cytotoxicity and loading/release of chemotherapeutics. RESULTS MS2 spheres were more dispersed, smaller, of solid core, of higher beta-sheet structure content, and of opposite (negative) charge than MS1 spheres. Preloaded MS2 showed greater applicability for mitoxantrone, while postloaded for etoposide delivery compared with MS1 spheres. However, MS1 spheres were a better choice for doxorubicin delivery than MS2. CONCLUSION Bioengineered silks can be tailored to develop a system with optimal drug loading and release properties.
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Affiliation(s)
- Katarzyna Jastrzebska
- Chair of Medical Biotechnology, Poznan University of Medical Sciences, 61–688 Poznan, Poland
- NanoBioMedical Centre, Adam Mickiewicz University, 61–614 Poznan, Poland
| | - Anna Florczak
- Chair of Medical Biotechnology, Poznan University of Medical Sciences, 61–688 Poznan, Poland
- NanoBioMedical Centre, Adam Mickiewicz University, 61–614 Poznan, Poland
| | - Kamil Kucharczyk
- Chair of Medical Biotechnology, Poznan University of Medical Sciences, 61–688 Poznan, Poland
| | - Yinnan Lin
- Biomedical Engineering Department, Tufts University, Medford, MA 02155, USA
| | - Qin Wang
- Biomedical Engineering Department, Tufts University, Medford, MA 02155, USA
| | - Andrzej Mackiewicz
- Chair of Medical Biotechnology, Poznan University of Medical Sciences, 61–688 Poznan, Poland
- BioContract Sp. z o.o., 61-051 Poznan, Poland
- Department of Diagnostics & Cancer Immunology, Greater Poland Cancer Centre, 61–688 Poznan, Poland
| | - David L Kaplan
- Biomedical Engineering Department, Tufts University, Medford, MA 02155, USA
| | - Hanna Dams-Kozlowska
- Chair of Medical Biotechnology, Poznan University of Medical Sciences, 61–688 Poznan, Poland
- Department of Diagnostics & Cancer Immunology, Greater Poland Cancer Centre, 61–688 Poznan, Poland
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16
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Du H, Zhou B, Zhang H, Jin Y, Zhang D, Lin D. Salinomycin inhibits canine mammary carcinoma in vitro by targeting cancer stem cells. Oncol Lett 2017; 14:427-32. [PMID: 28693187 DOI: 10.3892/ol.2017.6164] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Accepted: 02/17/2017] [Indexed: 12/13/2022] Open
Abstract
Salinomycin (SAL), a polyether ionophore antibiotic, has been demonstrated to selectively kill cancer stem cells (CSCs) in various types of human tumor. The aim of the present study was to investigate the effects of SAL on canine mammary CSCs. CSCs in canine mammary carcinoma cell lines (CMT7364 and CIPp) were identified using a sphere formation assay and flow cytometry. The chemoresistance, invasive potential and expression of stem cell-associated proteins of these spheres was then analyzed. This demonstrated that the spheres exhibited characteristics of CSCs, including a cluster of differentiation (CD)44+/CD24-/low phenotype, upregulation of Wnt/β-catenin signaling pathway-associated proteins and chemoresistance. The viability of the spheres was decreased in a concentration- and time-dependent manner following treatment with SAL, and the spheres did not exhibit increased resistance to SAL compared with their parental cells. In addition, exposure to SAL inhibited sphere-formation and invasive potential in canine mammary CSCs in a dose-dependent manner. Furthermore, SAL decreased the CD44+/CD24-/low population and downregulated the expression of Wnt/β-catenin signaling-associated proteins (β-catenin, Cyclin D1 and octamer-binding transcription factor 4) in the spheres. In conclusion, the present study demonstrated that SAL is an effective inhibitor of canine mammary CSCs in vitro, indicating that SAL is a promising chemotherapeutic agent for the treatment of canine mammary carcinoma.
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Abstract
The in vitro three-dimensional sphere model has already been established as an important tool in fundamental sciences. This model facilitates the study of a variety of biological processes including stem cell/niche functions and tissue responses to injury and drugs. Here we describe the complete protocol for the in vitro formation of spheres originated from the epithelium of rodent incisors. In addition, we show that in these spheres cell proliferation is maintained, as well as the expression of several key molecules characterizing stem cells such as Sox2 and p63. These epithelial dentospheres could be used as an in vitro model system for stem cell research purposes.
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Affiliation(s)
- Despoina Natsiou
- Orofacial Development and Regeneration, Centre for Dental Medicine, Institute of Oral Biology, University of Zurich Zurich, Switzerland
| | | | - Thimios A Mitsiadis
- Orofacial Development and Regeneration, Centre for Dental Medicine, Institute of Oral Biology, University of Zurich Zurich, Switzerland
| | - Lucia Jimenez-Rojo
- Orofacial Development and Regeneration, Centre for Dental Medicine, Institute of Oral Biology, University of Zurich Zurich, Switzerland
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Qin T, Mellgren T, Jefferies S, Xia W, Engqvist H. A Study for Tooth Bleaching via Carbamide Peroxide-Loaded Hollow Calcium Phosphate Spheres. Dent J (Basel) 2016; 5:E3. [PMID: 29563409 PMCID: PMC5806986 DOI: 10.3390/dj5010003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 12/08/2016] [Accepted: 12/21/2016] [Indexed: 11/29/2022] Open
Abstract
The objective of this study was to investigate if a prolonged bleaching effect of carbamide peroxide-loaded hollow calcium phosphate spheres (HCPS) can be achieved. HCPS was synthesized via a hydrothermal reaction method. Carbamide peroxide (CP) was-loaded into HCPS by mixing with distilled water as solvent. We developed two bleaching gels containing CP-loaded HCPS: one gel with low HP concentration as at-home bleaching gel, and one with high HP concentration as in-office gel. Their bleaching effects on stained human permanent posterior teeth were investigated by measuring the color difference before and after bleaching. The effect of gels on rhodamine B degradation was also studied. To investigate the potential effect of remineralization of using HCPS, bleached teeth were soaked in phosphate buffer solution (PBS) containing calcium and magnesium ions. Both bleaching gels had a prolonged whitening effect, and showed a strong ability to degrade rhodamine B. After soaking in PBS for 3 days, remineralization was observed at the sites where HCPS attached to the teeth surface. CP-loaded HCPS could prolong the HP release behavior and improve the bleaching effect. HCPS was effective in increasing the whitening effect of carbamide peroxide and improving remineralization after bleaching process.
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Affiliation(s)
- Tao Qin
- Division for Applied Material, Department of Engineering Science, Uppsala University, Uppsala 75121, Sweden.
| | - Torbjörn Mellgren
- Division for Applied Material, Department of Engineering Science, Uppsala University, Uppsala 75121, Sweden.
| | - Steven Jefferies
- Kornberg School of Dentistry, Department of Restorative Dentistry, Temple University, Philadelphia, PA 19140, USA.
| | - Wei Xia
- Division for Applied Material, Department of Engineering Science, Uppsala University, Uppsala 75121, Sweden.
| | - Håkan Engqvist
- Division for Applied Material, Department of Engineering Science, Uppsala University, Uppsala 75121, Sweden.
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Hoffman JF. Biconcave shape of human red-blood-cell ghosts relies on density differences between the rim and dimple of the ghost's plasma membrane. Proc Natl Acad Sci U S A 2016; 113:14847-51. [PMID: 27930321 DOI: 10.1073/pnas.1615452113] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
The shape of the human red blood cell is known to be a biconcave disk. It is evident from a variety of theoretical work that known physical properties of the membrane, such as its bending energy and elasticity, can explain the red-blood-cell biconcave shape as well as other shapes that red blood cells assume. But these analyses do not provide information on the underlying molecular causes. This paper describes experiments that attempt to identify some of the underlying determinates of cell shape. To this end, red-blood-cell ghosts were made by hypotonic hemolysis and then reconstituted such that they were smooth spheres in hypo-osmotic solutions and smooth biconcave discs in iso-osmotic solutions. The spherical ghosts were centrifuged onto a coated coverslip upon which they adhered. When the attached spheres were changed to biconcave discs by flushing with an iso-osmotic solution, the ghosts were observed to be mainly oriented in a flat alignment on the coverslip. This was interpreted to mean that, during centrifugation, the spherical ghosts were oriented by a dense band in its equatorial plane, parallel to the centrifugal field. This appears to be evidence that the difference in the densities between the rim and the dimple regions of red blood cells and their ghosts may be responsible for their biconcave shape.
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Abstract
A rediscovery of three-dimensional culture has led to the development of organ biogenesis, homeostasis and disease models applicable to human tissues. The so-called organoids that have recently flourished serve as valuable models bridging between cell lines or primary cells grown on the bottom of culture plates and experiments performed in vivo. Though not recapitulating all aspects of organ physiology, the miniature organs generated in a dish are useful models emerging for the pancreas, starting from embryonic progenitors, adult cells, tumour cells and stem cells. This review focusses on the currently available systems and their relevance to the study of the pancreas, of β-cells and of several pancreatic diseases including diabetes. We discuss the expected future developments for studying human pancreas development and function, for developing diabetes models and for producing therapeutic cells.
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Castelli A, de Graaf J, Prato M, Manna L, Arciniegas MP. Tic-Tac-Toe Binary Lattices from the Interfacial Self-Assembly of Branched and Spherical Nanocrystals. ACS Nano 2016; 10:4345-53. [PMID: 27027973 DOI: 10.1021/acsnano.5b08018] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The self-organization of nanocrystals has proven to be a versatile route to achieve increasingly sophisticated structures of materials, where the shape and properties of individual particles impact the final functionalities. Recent works have addressed this topic by combining various shapes to achieve more complex arrangements of particles than are possible in single-component samples. However, the ability to create intricate architectures over large regions by exploiting the shape of multiply branched nanocrystals to host a second component remains unexplored. Here, we show how the concave shape of a branched nanocrystal, the so-called octapod, is able to anchor a sphere. The two components self-assemble into a locally ordered monolayer consisting of an intercalated square lattice of octapods and spheres, which is reminiscent of the "tic-tac-toe" game. These tic-tac-toe domains form through an interfacial self-assembly that occurs by the dewetting of a hexane layer containing both particle types. By varying the experimental conditions and performing molecular dynamics simulations, we show that the ligands coating the octapods are crucial to the formation of this structure. We find that the tendency of an octapod to form an interlocking-type structure with a second octapod strongly depends on the ligand shell of the pods. Breaking this tendency by ligand exchange allows the octapods to assemble into a more relaxed configuration, which is able to form a lock-and-key-type structure with a sphere, when they have a suitable size ratio. Our findings provide an example of a more versatile use of branched nanocrystals in self-assembled functional materials.
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Affiliation(s)
- Andrea Castelli
- Istituto Italiano di Tecnologia (IIT) , via Morego 30, IT-16163 Genova, Italy
| | - Joost de Graaf
- Institute for Computational Physics (ICP), University of Stuttgart , Allmandring 3, 70569 Stuttgart, Germany
| | - Mirko Prato
- Istituto Italiano di Tecnologia (IIT) , via Morego 30, IT-16163 Genova, Italy
| | - Liberato Manna
- Istituto Italiano di Tecnologia (IIT) , via Morego 30, IT-16163 Genova, Italy
| | - Milena P Arciniegas
- Istituto Italiano di Tecnologia (IIT) , via Morego 30, IT-16163 Genova, Italy
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22
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Almeida LO, Guimarães DM, Squarize CH, Castilho RM. Profiling the Behavior of Distinct Populations of Head and Neck Cancer Stem Cells. Cancers (Basel) 2016; 8:E7. [PMID: 26742076 DOI: 10.3390/cancers8010007] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Revised: 12/13/2015] [Accepted: 12/30/2015] [Indexed: 01/16/2023] Open
Abstract
Cancer stem cells (CSCs) are a subpopulation of tumor cells endowed with self-renewal properties and the capacity to dynamically adapt to physiological changes that occur in the tumor microenvironment. CSCs play a central role in resistance to therapy and long-term disease recurrence. Better characterization and understanding of the available in vitro tools to study the biology of CSCs will improve our knowledge of the processes underlying tumor response to therapy, and will help in the screening and development of novel strategies targeting CSCs. We investigated the behavior of different populations of head and neck CSCs grown under ultra-low adhesion conditions. We found that invasion and adhesion differ among tumorsphere subtypes (holospheres, merospheres and paraspheres), and their tumor cell progeny also harbor distinct self-renewal and clonogenic potentials. Furthermore, holospheres contained higher numbers of head and neck CSCs, as detected by the CD44 cancer stem cell marker and aldehyde dehydrogenase (ALDH) enzymatic activity. In addition, holospheres showed reduced proliferation (Ki67), hypoacetylation of histones, and increased expression of the BMI-1 epithelial stem cell marker, suggesting activation of stem cell programs. Collectively, our results suggest that holospheres enrich a specific population of CSCs with enhanced “stemness” and invasive potential.
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23
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Zhao C, Tan G, Huang J, Yang W, Ren H, Xia A. Preparation of Self-Assembled Spherical g-C3N4/tz-Bi(0.92)Gd(0.08)VO4 Heterojunctions and Their Mineralization Properties. ACS Appl Mater Interfaces 2015; 7:23949-57. [PMID: 26445025 DOI: 10.1021/acsami.5b06501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
A novel kind of spherical g-C3N4/tz-Bi0.92Gd0.08VO4 heterojuctions are prepared via a simple microwave hydrothermal method. The sphere self-assembled mechanism and the heterojunction photocatalytic mechanism are mainly studied in this article. The results show that the added g-C3N4 sheets first anchor on ms-BiVO4 surfaces and then polymerize to form the coating layers, generating steric effect which is competing with Gd(3+) induction effect to affect the crystal transformation (from ms-BiVO4 to tz-BiVO4) and its growth during those processes. Afterward, independent coated structures are further polymerized and assembled into g-C3N4/tz-Bi0.92Gd0.08VO4 spheres. Because ECB (-0.95 V) of g-C3N4 is more negative than ECB (-0.05 V) of tz-BiVO4, the photoelectrons of g-C3N4 can be transferred into tz-BiVO4 surfaces through the heterojunction structure, so as to promote the separation rate of electron-hole pairs. In general, the adding of g-C3N4 can introduce hydroxyl groups to catch the photoholes and can inject electrons to react with dissolved oxygen to boost the production of active groups. Depending on such an orderly cooperation, g-C3N4/tz-Bi0.92Gd0.08VO4 heterojunction catalysts exhibit high and stable mineralization properties.
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Affiliation(s)
- Chengcheng Zhao
- School of Materials Science and Engineering, Shaanxi University of Science & Technology , Xi'an 710021, China
| | - Guoqiang Tan
- School of Materials Science and Engineering, Shaanxi University of Science & Technology , Xi'an 710021, China
| | - Jing Huang
- School of Materials Science and Engineering, Shaanxi University of Science & Technology , Xi'an 710021, China
| | - Wei Yang
- School of Materials Science and Engineering, Shaanxi University of Science & Technology , Xi'an 710021, China
| | - Huijun Ren
- School of Materials Science and Engineering, Shaanxi University of Science & Technology , Xi'an 710021, China
| | - Ao Xia
- School of Materials Science and Engineering, Shaanxi University of Science & Technology , Xi'an 710021, China
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Clément F, Zhu HH, Gao WQ, Delay E, Maguer-Satta V. Quantifying Epithelial Early Common Progenitors from Long-Term Primary or Cell Line Sphere Culture. ACTA ACUST UNITED AC 2015; 35:1E.7.1-1E.7.8. [PMID: 26544537 DOI: 10.1002/9780470151808.sc01e07s35] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Here, a protocol to quantify epithelial early common progenitor/stem cells grown as spheres in non-adherent culture conditions is described. This protocol is based on the combination of two functional tests: the sphere assay to maintain and enrich early progenitor/stem cells, and the epithelial colony-forming cells (E-CFC) assay to identify and quantify further differentiated epithelial progenitors. Primary spheres mainly contain progenitors and rare stem/early common progenitor cells while secondary and tertiary spheres contain progenitor cells derived from the early common progenitor/stem cell population maintained through passages and partially differentiated. Spheres are enzymatically and mechanically dissociated; the derived cells are subsequently plated on irradiated NIH-3T3 fibroblasts for further processing, as in the E-CFC assay. The principle of this assay is to quantify the number of epithelial colonies generated by cells present in the different sequential spheres. This assay has therefore been named the early common progenitor-derived colonies assay (ECP-DC).
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Affiliation(s)
- Flora Clément
- INSERM U1052, Centre de Recherche en Cancérologie de Lyon, Lyon, France.,CNRS UMR5286, Centre de Recherche en Cancérologie de Lyon, Lyon, France.,Université de Lyon, Université Lyon 1, Lyon, France
| | - Helen He Zhu
- State Key Laboratory of Oncogenes and Related Genes, Renji-Med X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,School of Biomedical Engineering & Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, China
| | - Wei-Qiang Gao
- State Key Laboratory of Oncogenes and Related Genes, Renji-Med X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,School of Biomedical Engineering & Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, China
| | - Emmanuel Delay
- INSERM U1052, Centre de Recherche en Cancérologie de Lyon, Lyon, France.,CNRS UMR5286, Centre de Recherche en Cancérologie de Lyon, Lyon, France.,Université de Lyon, Université Lyon 1, Lyon, France.,Department of Tumor Escape Signaling, Centre de Recherche en Cancérologie de Lyon, Lyon, France.,Centre Léon Bérard, Lyon, France
| | - Véronique Maguer-Satta
- INSERM U1052, Centre de Recherche en Cancérologie de Lyon, Lyon, France.,CNRS UMR5286, Centre de Recherche en Cancérologie de Lyon, Lyon, France.,Université de Lyon, Université Lyon 1, Lyon, France.,Department of Tumor Escape Signaling, Centre de Recherche en Cancérologie de Lyon, Lyon, France
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25
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Antepli E, Sarı N. Spectroscopic analysis and the excellent reusability of sphere-capped ferrocene in the oxidation of glucose oxidase. Artif Cells Nanomed Biotechnol 2015; 44:1311-7. [PMID: 26148176 DOI: 10.3109/21691401.2015.1029626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Sphere-capped ferrocene nanospheres with Schiff base spacers have been prepared using a template, and used as carriers to immobilize glucose oxidase (GOx). GOx immobilized on spheres with one C-spacer (APS-Fc) exhibited high binding affinity to the substrate, which was attributed to appropriate position for the GOx conformation. When glucose oxidase was immobilized with spacers of different lengths, it was found that storage stability decreased with increasing the length of the spacer. It has been found that nanospheres, including capped ferrocene, exhibit good performance as the immobilized supporters of GOx. (APS-EtFc-GOx) retain more than 10% of the initial activity after forty-two successive cycles, which is a remarkable result.
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Affiliation(s)
- Esin Antepli
- a Department of Chemistry , Faculty of Science, Gazi University , Ankara , Turkiye
| | - Nurşen Sarı
- a Department of Chemistry , Faculty of Science, Gazi University , Ankara , Turkiye
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26
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Liu W, Selçuk F, Rütgen BC, Moulay M, Willenbrock S, Hammer SE, Sterenczak KA, Junghanss C, Hewicker-Trautwein M, Nolte I, Murua Escobar H. Evaluation of Stem Cell Marker Expression in Canine B-Cell Lymphoma Cell Lines, B-Cell Lymphoma-generated Spheres and Primary Samples. Anticancer Res 2015; 35:2805-2816. [PMID: 25964560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
BACKGROUND Canine lymphoma has lately drawn focus as a model of human non-Hodgkin's lymphoma due to its spontaneous occurrence and similar biological behavior. Cells with stem cell-like characteristics are believed to play a key role in therapeutic failure. Thus, an initial characterization and the possibility of specific detection of such cells could bear significant value. MATERIALS AND METHODS Expression of 12 stem cell markers were analyzed in two canine B-cell lymphoma cell lines, their generated spheres, and in primary lymphoma samples by quantitative real-time polymerase chain reaction and partially by flow cytometry and immunocytochemistry. RESULTS Expression of maternal embryonic leucine zipper kinase (Melk) was significantly higher in CLBL-1, CLBL-1M and in primary B-cell lymphoma samples compared to non-neoplastic lymph nodes. Spheres displayed a higher expression of v-myc myelocytomatosis viral oncogene homolog (Myc) and lower expression of Cd44 compared to original cell lines and primary B-cell lymphoma samples. CONCLUSION The results suggest a potential interesting role of Melk in canine B-cell lymphoma. Furthermore, the up-regulation of Myc in serum-free-generated spheres offers interesting possibilities for functional assays characterizing the specific generated sub-population.
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Affiliation(s)
- Wen Liu
- Small Animal Clinic, University of Veterinary Medicine Hannover, Hannover, Germany Division of Medicine, Clinic III, Hematology, Oncology and Palliative Medicine, University of Rostock, Rostock, Germany
| | - Feyza Selçuk
- Small Animal Clinic, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Barbara C Rütgen
- Clinical Pathology, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Mohammed Moulay
- Small Animal Clinic, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Saskia Willenbrock
- Small Animal Clinic, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Sabine E Hammer
- Institute of Immunology, Department of Pathobiology, University of Veterinary Medicine Vienna, Vienna, Austria
| | | | - Christian Junghanss
- Division of Medicine, Clinic III, Hematology, Oncology and Palliative Medicine, University of Rostock, Rostock, Germany
| | | | - Ingo Nolte
- Small Animal Clinic, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Hugo Murua Escobar
- Small Animal Clinic, University of Veterinary Medicine Hannover, Hannover, Germany Division of Medicine, Clinic III, Hematology, Oncology and Palliative Medicine, University of Rostock, Rostock, Germany
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Liu F, Yu J, Ji X, Qian M. Nanosheet-structured boron nitride spheres with a versatile adsorption capacity for water cleaning. ACS Appl Mater Interfaces 2015; 7:1824-1832. [PMID: 25552343 DOI: 10.1021/am507491z] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Here, we report the synthesis of nanosheet-structured boron nitride spheres (NSBNSs) by a catalyzing thermal evaporation method from solid B powders. The NSBNSs consist of radially oriented ultrathin nanosheets with the sheet edges oriented on the surface. Formation of this unique structure occurs only at a certain reaction temperature. The diameter from 4 μm to 700 nm and the nanosheet thickness from 9.1 to 3.1 nm of the NSBNSs can be well-controlled by appropriately changing the mass ratio of boron powders and catalyst. The NSBNSs possess versatile adsorption capacity, exhibiting excellent adsorption performance for oil, dyes, and heavy metal ions from water. The oil uptake reaches 7.8 times its own weight. The adsorption capacities for malachite green and methylene blue are 324 and 233 mg/g, while those for Cu(2+), Pb(2+), and Cd(2+) are 678.7, 536.7, and 107.0 mg/g, respectively. The adsorption capacities of the NSBNSs for Cu(2+) and Pb(2+) are higher or much higher than those of the adsorbents reported previously. These results demonstrate the great potential of NSBNSs for water treatment and cleaning.
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Affiliation(s)
- Fei Liu
- Shenzhen Engineering Lab of Flexible Transparent Conductive Films, Shenzhen Key Laboratory for Advanced Materials, and Department of Material Science and Engineering, Shenzhen Graduate School, Harbin Institute of Technology , University Town, Shenzhen 518055, China
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28
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Carrick C, Pendergraph SA, Wågberg L. Nanometer smooth, macroscopic spherical cellulose probes for contact adhesion measurements. ACS Appl Mater Interfaces 2014; 6:20928-35. [PMID: 25382855 DOI: 10.1021/am505673u] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Cellulose spheres were prepared by dissolving cellulose fibers and subsequently solidifying the solution in a nonsolvent. Three different solution concentrations were tested and several nonsolvents were evaluated for their effect on the formation of spheres. Conditions were highlighted to create cellulose spheres with a diameter of ∼1 mm and a root-mean-square surface roughness of ∼1 nm. These solid spheres were shown to be easily chemically modified without changing the mechanical properties significantly. Contact adhesion measurements were then implemented with these spheres against a poly(dimethylsiloxane) (PDMS) elastomer in order to quantify the adhesion. Using Johnson-Kendall-Roberts (JKR) theory, we quantified the adhesion for unmodified cellulose and hydrophobic cellulose spheres. We highlight the ability of these spheres to report more accurate adhesion information, compared to spin-coated thin films. The application of these new cellulose probes also opens up new possibilities for direct, accurate measurement of adhesion between cellulose and other materials instead of using uncertain surface energy determinations to calculate the theoretical work of adhesion between cellulose and different solid materials.
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Affiliation(s)
- Christopher Carrick
- KTH Royal Institute of Technology , School of Chemical Science and Engineering, Department of Fibre and Polymer Technology, SE-100 44 Stockholm, Sweden
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Felix R, van Wielink P. Calodromius bifasciatus and other Carabidae on 26 oak-trunks in a nature reserve in the Netherlands. Zookeys 2011:533-44. [PMID: 21738432 PMCID: PMC3131036 DOI: 10.3897/zookeys.100.1544] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2009] [Accepted: 07/08/2010] [Indexed: 11/12/2022] Open
Abstract
The discovery of Calodromius bifasciatus in the nature reserve 'De Kaaistoep', the Netherlands, initiated research on this and related carabid beetles between 2000 and 2006. During this period we investigated the trunks of 26 Pedunculate oaks, mainly during nightly observations, to learn more about arboricolous carabid species. We observed more than 3000 specimens of 24 carabid species. The majority of these species were Dromiuss.l., however Calodromius bifasciatus dominated the dataset. Our data on phenology clearly show that Calodromius bifasciatus is mainly active in winter; it even copulates just above freezing point. Other interesting observations were made as well; for instance the presence of a small sphere at the end of the abdomen and their hiding behaviour at low temperatures. Subsequently, we obtained similar information about other tree dwelling carabid species. In this article we present an overview of all species observed on the trunks, after which we shall focus on the observations made on Calodromius bifasciatus.
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Affiliation(s)
- Ron Felix
- Hazelaarlaan 51, 5056 XP Berkel Enschot, The Netherlands
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Abstract
The theories of signal sampling, filter banks, wavelets, and "overcomplete wavelets" are well established for the Euclidean spaces and are widely used in the processing and analysis of images. While recent advances have extended some filtering methods to spherical images, many key challenges remain. In this paper, we develop theoretical conditions for the invertibility of filter banks under continuous spherical convolution. Furthermore, we present an analogue of the Papoulis generalized sampling theorem on the 2-Sphere. We use the theoretical results to establish a general framework for the design of invertible filter banks on the sphere and demonstrate the approach with examples of self-invertible spherical wavelets and steerable pyramids. We conclude by examining the use of a self-invertible spherical steerable pyramid in a denoising experiment and discussing the computational complexity of the filtering framework.
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Affiliation(s)
- Boon Thye Thomas Yeo
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139 USA
| | - Wanmei Ou
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139 USA
| | - Polina Golland
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139 USA
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31
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Lehnert L, Lerch MM, Hirai Y, Kruse ML, Schmiegel W, Kalthoff H. Autocrine stimulation of human pancreatic duct-like development by soluble isoforms of epimorphin in vitro. J Cell Biol 2001; 152:911-22. [PMID: 11238448 PMCID: PMC2198814 DOI: 10.1083/jcb.152.5.911] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Epimorphin was recently described as a mesenchymal factor modulating morphogenesis of murine mammary ducts, skin, liver, and lung in vitro. In this study epimorphin was analyzed in a human, pancreatic adenocarcinoma cell line (A818-6) which develops single layer epithelial hollow spheres resembling normal pancreatic ductal structures in vitro. Soluble 34- and 31-kD isoforms of epimorphin were found in the culture supernatant of A818-6 cells. In lysates of A818-6 cells we detected the 34-and 31-kD isoforms and the dimers, and in lysates of fibroblasts the 150-kD tetramers of epimorphin additionally. A neutralizing monoclonal antibody against epimorphin (MC-1) efficiently blocked the development of hollow sphere structures from A818-6 cells. Coculture of A818-6 cells with fibroblasts stimulated the development of hollow sphere structures in general and increased differentiation in 5-6-d-old hollow spheres. A818-6 hollow sphere development in the presence of fibroblasts was also blocked by MC-1. In this novel system for human duct-like differentiation of pancreatic epithelial cells, we provide evidence for an autocrine and paracrine function of epimorphin as a major mediator for morphogenesis.
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Affiliation(s)
- Lasse Lehnert
- Molecular Oncology, Department of General and Thoracic Surgery
| | - Markus M. Lerch
- Department of Medicine B, Westfälische Wilhelms University, Münster 48149, Germany
| | - Yohei Hirai
- Sumitomo Industries, Yokohama 244-8588, Japan
| | - Marie-Luise Kruse
- First Department of Medicine, Laboratory for Molecular Gastroenterology and Hepatology, Christian-Albrechts University, Kiel 24105, Germany
| | - Wolff Schmiegel
- Medical Clinic, Knappschaftskrankenhaus, Ruhr, University of Bochum, Bochum 44780, Germany
| | - Holger Kalthoff
- Molecular Oncology, Department of General and Thoracic Surgery
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