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de Villiers M, Kotzé AF, du Plessis LH. Pneumatic extrusion bioprinting-based high throughput fabrication of a melanoma 3D cell culture model for anti-cancer drug screening. Biomed Mater 2024; 19:055034. [PMID: 39025118 DOI: 10.1088/1748-605x/ad651f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Accepted: 07/18/2024] [Indexed: 07/20/2024]
Abstract
The high incidence of malignant melanoma highlights the need forin vitromodels that accurately represent the tumour microenvironment, enabling developments in melanoma therapy and drug screening. Despite several advancements in 3D cell culture models, appropriate melanoma models for evaluating drug efficacy are still in high demand. The 3D pneumatic extrusion-based bioprinting technology offers numerous benefits, including the ability to achieve high-throughput capabilities. However, there is a lack of research that combines pneumatic extrusion-based bioprinting with analytical assays to enable efficient drug screening in 3D melanoma models. To address this gap, this study developed a simple and highly reproducible approach to fabricate a 3D A375 melanoma cell culture model using the pneumatic extrusion-based bioprinting technology. To optimise this method, the bioprinting parameters for producing 3D cell cultures in a 96-well plate were adjusted to improve reproducibility while maintaining the desired droplet size and a cell viability of 92.13 ± 6.02%. The cross-linking method was optimised by evaluating cell viability and proliferation of the 3D bioprinted cells in three different concentrations of calcium chloride. The lower concentration of 50 mM resulted in higher cell viability and increased cell proliferation after 9 d of incubation. The A375 cells exhibited a steadier proliferation rate in the 3D bioprinted cell cultures, and tended to aggregate into spheroids, whereas the 2D cell cultures generally formed monolayered cell sheets. In addition, we evaluated the drug responses of four different anti-cancer drugs on the A375 cells in both the 2D and 3D cell cultures. The 3D cell cultures exhibited higher levels of drug resistance in all four tested anti-cancer drugs. This method presents a simple and cost-effective method of producing and analysing 3D cell culture models that do not add additional complexity to current assays and shows considerable potential for advancing 3D cell culture models' drug efficacy evaluations.
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Affiliation(s)
- Maryke de Villiers
- Centre of Excellence for Pharmaceutical Sciences, Faculty of Health Sciences North-West University, Private Bag X6001, Potchefstroom 2520, South Africa
| | - Awie F Kotzé
- Centre of Excellence for Pharmaceutical Sciences, Faculty of Health Sciences North-West University, Private Bag X6001, Potchefstroom 2520, South Africa
| | - Lissinda H du Plessis
- Centre of Excellence for Pharmaceutical Sciences, Faculty of Health Sciences North-West University, Private Bag X6001, Potchefstroom 2520, South Africa
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Warmack RA, Wenke BB, Spatzal T, Rees DC. Anaerobic cryoEM protocols for air-sensitive nitrogenase proteins. Nat Protoc 2024; 19:2026-2051. [PMID: 38575747 DOI: 10.1038/s41596-024-00973-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 01/11/2024] [Indexed: 04/06/2024]
Abstract
Single-particle cryo-electron microscopy (cryoEM) provides an attractive avenue for advancing our atomic resolution understanding of materials, molecules and living systems. However, the vast majority of published cryoEM methodologies focus on the characterization of aerobically purified samples. Air-sensitive enzymes and microorganisms represent important yet understudied systems in structural biology. We have recently demonstrated the success of an anaerobic single-particle cryoEM workflow applied to the air-sensitive nitrogenase enzymes. In this protocol, we detail the use of Schlenk lines and anaerobic chambers to prepare samples, including a protein tag for monitoring sample exposure to oxygen in air. We describe how to use a plunge freezing apparatus inside of a soft-sided vinyl chamber of the type we routinely use for anaerobic biochemistry and crystallography of oxygen-sensitive proteins. Manual control of the airlock allows for introduction of liquid cryogens into the tent. A custom vacuum port provides slow, continuous evacuation of the tent atmosphere to avoid accumulation of flammable vapors within the enclosed chamber. These methods allowed us to obtain high-resolution structures of both nitrogenase proteins using single-particle cryoEM. The procedures involved can be generally subdivided into a 4 d anaerobic sample generation procedure, and a 1 d anaerobic cryoEM sample preparation step, followed by conventional cryoEM imaging and processing steps. As nitrogen is a substrate for nitrogenase, the Schlenk lines and anaerobic chambers described in this procedure are operated under an argon atmosphere; however, the system and these procedures are compatible with other controlled gas environments.
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Affiliation(s)
- Rebeccah A Warmack
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA.
- Howard Hughes Medical Institute, California Institute of Technology, Pasadena, CA, USA.
| | - Belinda B Wenke
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA
| | - Thomas Spatzal
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA
| | - Douglas C Rees
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA.
- Howard Hughes Medical Institute, California Institute of Technology, Pasadena, CA, USA.
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Huff LK, Amurgis CM, Kokai LE, Abbott RD. Optimization and validation of a fat-on-a-chip model for non-invasive therapeutic drug discovery. Front Bioeng Biotechnol 2024; 12:1404327. [PMID: 38988864 PMCID: PMC11235003 DOI: 10.3389/fbioe.2024.1404327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Accepted: 05/24/2024] [Indexed: 07/12/2024] Open
Abstract
Obesity is a significant public health concern that is closely associated with various comorbidities such as heart disease, stroke, type II diabetes (T2D), and certain cancers. Due to the central role of adipose tissue in many disease etiologies and the pervasive nature in the body, engineered adipose tissue models are essential for drug discovery and studying disease progression. This study validates a fat-on-a-chip (FOAC) model derived from primary mature adipocytes. Our FOAC model uses a Micronit perfusion device and introduces a novel approach for collecting continuous data by using two non-invasive readout techniques, resazurin and glucose uptake. The Micronit platform proved to be a reproducible model that can effectively maintain adipocyte viability, metabolic activity, and basic functionality, and is capable of mimicking physiologically relevant responses such as adipocyte hypertrophy and insulin-mediated glucose uptake. Importantly, we demonstrate that adipocyte size is highly dependent on extracellular matrix properties, as adipocytes derived from different patients with variable starting lipid areas equilibrate to the same size in the hyaluronic acid hydrogel. This model can be used to study T2D and monitor adipocyte responses to insulin for longitudinally tracking therapeutic efficacy of novel drugs or drug combinations.
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Affiliation(s)
- Lindsey K. Huff
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA, United States
| | - Charles M. Amurgis
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, United States
| | - Lauren E. Kokai
- Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, PA, United States
| | - Rosalyn D. Abbott
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA, United States
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Mahboubi H, Yu H, Malca M, McCusty D, Stochaj U. Pifithrin-µ Induces Stress Granule Formation, Regulates Cell Survival, and Rewires Cellular Signaling. Cells 2024; 13:885. [PMID: 38891018 PMCID: PMC11172192 DOI: 10.3390/cells13110885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 04/30/2024] [Accepted: 05/15/2024] [Indexed: 06/20/2024] Open
Abstract
(1) Background: Stress granules (SGs) are cytoplasmic protein-RNA condensates that assemble in response to various insults. SG production is driven by signaling pathways that are relevant to human disease. Compounds that modulate SG characteristics are therefore of clinical interest. Pifithrin-µ is a candidate anti-tumor agent that inhibits members of the hsp70 chaperone family. While hsp70s are required for granulostasis, the impact of pifithrin-µ on SG formation is unknown. (2) Methods: Using HeLa cells as model system, cell-based assays evaluated the effects of pifithrin-µ on cell viability. Quantitative Western blotting assessed cell signaling events and SG proteins. Confocal microscopy combined with quantitative image analyses examined multiple SG parameters. (3) Results: Pifithrin-µ induced bona fide SGs in the absence of exogenous stress. These SGs were dynamic; their properties were determined by the duration of pifithrin-µ treatment. The phosphorylation of eIF2α was mandatory to generate SGs upon pifithrin-µ exposure. Moreover, the formation of pifithrin-µ SGs was accompanied by profound changes in cell signaling. Pifithrin-µ reduced the activation of 5'-AMP-activated protein kinase, whereas the pro-survival protein kinase Akt was activated. Long-term pifithrin-µ treatment caused a marked loss of cell viability. (4) Conclusions: Our study identified stress-related changes in cellular homeostasis that are elicited by pifithrin-µ. These insights are important knowledge for the appropriate therapeutic use of pifithrin-µ and related compounds.
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Affiliation(s)
- Hicham Mahboubi
- Department of Physiology, McGill University, Montreal, QC H3G 1Y6, Canada (H.Y.); (M.M.)
| | - Henry Yu
- Department of Physiology, McGill University, Montreal, QC H3G 1Y6, Canada (H.Y.); (M.M.)
| | - Michael Malca
- Department of Physiology, McGill University, Montreal, QC H3G 1Y6, Canada (H.Y.); (M.M.)
| | - David McCusty
- Department of Physiology, McGill University, Montreal, QC H3G 1Y6, Canada (H.Y.); (M.M.)
| | - Ursula Stochaj
- Department of Physiology, McGill University, Montreal, QC H3G 1Y6, Canada (H.Y.); (M.M.)
- Quantitative Life Sciences Program, McGill University, Montreal, QC H3G 1Y6, Canada
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Schweinitzer S, Kadousaraei MJ, Aydin MS, Mustafa K, Rashad A. Measuring cell proliferation in bioprinting research. Biomed Mater 2024; 19:031001. [PMID: 38518363 DOI: 10.1088/1748-605x/ad3700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 03/22/2024] [Indexed: 03/24/2024]
Abstract
Tissue-like constructs, intended for application in tissue engineering and regenerative medicine, can be produced by three-dimensional (3D) bioprinting of cells in hydrogels. It is essential that the viability and proliferation of the encapsulated cells can be reliably determined. Methods currently used to evaluate cell proliferation, such as quantification of DNA and measurement of metabolic activity, have been developed for application in 2D cultures and might not be suitable for bioinks. In this study, human fibroblasts were either cast or printed in gelatin methacryloyl (GelMA) or sodium alginate hydrogels and cell proliferation was assessed by AlamarBlue, PicoGreen and visual cell counts. Comparison of data extrapolated from standard curves generated from 2D cultures and 3D hydrogels showed potential inaccuracies. Moreover, there were pronounced discrepancies in cell numbers obtained from these assays; the different bioinks strongly influenced the outcomes. Overall, the results indicate that more than one method should be applied for better assessment of cell proliferation in bioinks.
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Affiliation(s)
- Sophie Schweinitzer
- Department of Biochemistry, Julius-Maximilians-University Würzburg, Würzburg, Germany
- Center of Translational Oral Research, Department of Clinical Dentistry, University of Bergen, Bergen, Norway
| | - Masoumeh Jahani Kadousaraei
- Center of Translational Oral Research, Department of Clinical Dentistry, University of Bergen, Bergen, Norway
| | - Mehmet Serhat Aydin
- Center of Translational Oral Research, Department of Clinical Dentistry, University of Bergen, Bergen, Norway
| | - Kamal Mustafa
- Center of Translational Oral Research, Department of Clinical Dentistry, University of Bergen, Bergen, Norway
| | - Ahmad Rashad
- Center of Translational Oral Research, Department of Clinical Dentistry, University of Bergen, Bergen, Norway
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Qasim SSB, Trajkovski B, Zafiropoulos GG. The response of human osteoblasts on bovine xenografts with and without hyaluronate used in bone augmentation. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2024; 35:880-897. [PMID: 38346177 DOI: 10.1080/09205063.2024.2311454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2023] [Accepted: 01/24/2024] [Indexed: 04/13/2024]
Abstract
The aim of the in vitro study was to asses the effect of hyaluronate in conjunction with bovine derived xenografts on the viability, proliferation on day 4, 7 and 10, expression of early osteogenic differentiation marker Alkaline phosphatase on day 14 and 21, collagen, calcium deposition on day 14, 21 and 28 and cellular characteristics, as assessed through live cell image analysis, confocal laser scanning microscopy and scanning electron microscopy, in primary human osteoblasts compared to three bovine xenografts without hyaluronate. All experiments were performed in triplicates. Data were compared between groups and timepoints using one-way analysis of variance (ANOVA). Bonferroni post hoc test were further used for multiple comparison between groups (p < .05) An increase in cell viability (p < .05) and enhanced ALP activity was observed in all xenografts. Specimens containing hyaluronate showed a highest significant difference (23755 ± 29953, p < .0001). The highest levels of calcium (1.60 ± 0.30) and collagen (1.92 ± 0.09, p < .0001) deposition were also observed with hyaluronate loaded groups. The osteoblasts were well attached and spread on all xenograft groups. However, a higher number of cells were observed with hyaluronate functionalized xenograft (76.27 ± 15.11, (p < .0001) in live cell image analysis and they migrated towards the graft boundaries. The biofunctionalization of xenografts with hyaluronate improves their in vitro performance on human osteoblasts. This suggests that hyaluronate might be able to improve the bone regeneration when using such xenografts.
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Affiliation(s)
- Syed Saad Bin Qasim
- Department of Bioclinical Sciences, College of Dentistry, Kuwait University, Safat, Kuwait
| | - Branko Trajkovski
- Faculty of Dentistry, College of Dentistry, Kuwait University, Safat, Kuwait
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Petiti J, Revel L, Divieto C. Standard Operating Procedure to Optimize Resazurin-Based Viability Assays. BIOSENSORS 2024; 14:156. [PMID: 38667149 PMCID: PMC11048620 DOI: 10.3390/bios14040156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 03/23/2024] [Accepted: 03/25/2024] [Indexed: 04/28/2024]
Abstract
The resazurin assay, also known as the Alamar Blue assay, stands as a cornerstone technique in cell biology, microbiology, and drug development. It assesses the viability of cells through the conversion of resazurin into highly fluorescent resorufin. The resulting fluorescence intensity provides a reliable estimate of viable cell numbers. Cytotoxicity assays, such as the resazurin-based method, play a crucial role in the screening of potential drug candidates and in the assessment of pharmaceutical and chemical toxicity. In recent years, inconsistencies have arisen in pharmacogenomic studies, often due to poorly optimized laboratory protocols. These inconsistencies hinder progress in understanding how substances affect cell health, leading to unreliable findings. Thus, the need for standardized and rigorously optimized protocols is evident to ensure consistent and accurate results in cytotoxicity studies. This manuscript describes a standardized procedure for optimizing resazurin-based viability assays to improve the reliability of cytotoxicity data. This optimization approach focuses on critical experimental parameters and data quality, aiming to achieve a level of measurement imprecision of less than 20%. In conclusion, to address the critical issues of reproducibility and reliability, protocol standardization, such as the one described in this manuscript, can greatly enhance the credibility of cytotoxicity studies, ultimately advancing drug safety assessments.
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Affiliation(s)
- Jessica Petiti
- Division of Advanced Materials Metrology and Life Sciences, Istituto Nazionale di Ricerca Metrologica (INRIM), 10135 Turin, Italy; (L.R.); (C.D.)
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Sharma A, Moore E, Williams LN. An in vitro study of micromechanics, cellular proliferation and viability on both decellularized porcine dura grafts and native porcine dura grafts. BIOMEDICAL ENGINEERING ADVANCES 2023; 6:100108. [PMID: 38259430 PMCID: PMC10803071 DOI: 10.1016/j.bea.2023.100108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024] Open
Abstract
Damage to the dura mater may occur during intracranial or spinal surgeries, which can result in cerebrospinal fluid leakage and other potentially fatal physiological changes. As a result, biological and synthetic derived scaffolds are typically used to repair dura mater post intracranial or spinal surgeries. The extracellular matrix of xenogeneic dura scaffolds has been shown to exhibit increased cell infiltration and regeneration than synthetic dura materials. In this study, we investigated the biocompatibility of native and decellularized porcine dura by seeding rat fibroblast cells onto the constructs. Cell proliferation, cell viability, and the mechanical properties of these dural grafts were evaluated post-re-seeding on days 3,7 and 14. Live-dead staining and resazurin salts were used to quantify cell viability and cell proliferation, respectively. Micro indentation was conducted to quantify the mechanical integrity of the native and acellular dura graft. The findings indicate that the acellular porcine dura graft creates a beneficial setting for infiltrating rat fibroblast cells. Cell viability, proliferation, and micro indentation results on the acellular grafts are comparable with the native control porcine dura tissue. In conclusion, the porcine scaffold material showed increased cell viability at each time point evaluated. The sustained mechanical response and favorable viability of the cells on the decellularized grafts provide promising insight into the potential use of porcine dura in clinical cranial dura mater graft applications.
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Affiliation(s)
- Ashma Sharma
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL 32611, USA
| | - Erika Moore
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA
| | - Lakiesha N. Williams
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL 32611, USA
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Mukherjee A, Ahn YH. A downstream process control tool based on the redox dye resazurin for rapid and accurate measurement of microbial metabolic activity. Anal Bioanal Chem 2023; 415:5539-5550. [PMID: 37401963 DOI: 10.1007/s00216-023-04828-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 06/15/2023] [Accepted: 06/26/2023] [Indexed: 07/05/2023]
Abstract
Many sophisticated water treatment plants need a reliable, fast, and economical microbial load detection method. We refined a colorimetric assay using the redox dye resazurin to assess viable microorganisms. Here, we have used a mixed bacterial suspension of significant multi-drug-resistant coliform bacteria isolated from hospital wastewater and constructed a resazurin reduction calibration curve which could accurately predict the level of microbial contamination. The number of viable microorganisms was calculated from calibration curve in terms of log colony forming units (CFU) per milliliter. Ultrasonication disinfection of bacterial suspension for a duration of 50 min measured by resazurin assay depicted a reduction of 16.94%, 26.48%, and 37.69% at 410 W, 580 W, and 700 W, respectively. A synergistic effect of the combined methods of ultrasonication and heat disinfection treatments on raw wastewater and secondary wastewater effluent was observed and was also evaluated using both resazurin assay and standard plate count method. For raw wastewater, about 1.8 log reduction was observed for ultrasonication alone and 4 log CFU/mL reduction for thermosonication. In the secondary wastewater effluent, a reduction of 2.9 and 3.2 log CFU/mL was recorded for ultrasonication and thermosonication respectively. Resazurin microbial viability test results were highly comparable with conventional colony plate count for all treatment procedures, suggesting its appropriateness for quick and reliable wastewater sample microbial viability monitoring.
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Affiliation(s)
- Arkadeep Mukherjee
- Department of Civil Engineering, Yeungnam University, Gyeongsan, 38541, Republic of Korea
| | - Young-Ho Ahn
- Department of Civil Engineering, Yeungnam University, Gyeongsan, 38541, Republic of Korea.
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Darici S, Jørgensen HG, Huang X, Serafin V, Antolini L, Barozzi P, Luppi M, Forghieri F, Marmiroli S, Zavatti M. Improved efficacy of quizartinib in combination therapy with PI3K inhibition in primary FLT3-ITD AML cells. Adv Biol Regul 2023; 89:100974. [PMID: 37245251 DOI: 10.1016/j.jbior.2023.100974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 05/09/2023] [Accepted: 05/22/2023] [Indexed: 05/30/2023]
Abstract
Acute myeloid leukemia is a heterogeneous hematopoietic malignancy, characterized by uncontrolled clonal proliferation of abnormal myeloid progenitor cells, with poor outcomes. The internal tandem duplication (ITD) mutation of the Fms-like receptor tyrosine kinase 3 (FLT3) (FLT3-ITD) represents the most common genetic alteration in AML, detected in approximately 30% of AML patients, and is associated with high leukemic burden and poor prognosis. Therefore, this kinase has been regarded as an attractive druggable target for the treatment of FLT3-ITD AML, and selective small molecule inhibitors, such as quizartinib, have been identified and trialled. However, clinical outcomes have been disappointing so far due to poor remission rates, also because of acquired resistance. A strategy to overcome resistance is to combine FLT3 inhibitors with other targeted therapies. In this study, we investigated the preclinical efficacy of the combination of quizartinib with the pan PI3K inhibitor BAY-806946 in FLT3-ITD cell lines and primary cells from AML patients. We show here that BAY-806946 enhanced quizartinib cytotoxicity and, most importantly, that this combination increases the ability of quizartinib to kill CD34+ CD38-leukemia stem cells, whilst sparing normal hematopoietic stem cells. Because constitutively active FLT3 receptor tyrosine kinase is known to boost aberrant PI3K signaling, the increased sensitivity of primary cells to the above combination can be the mechanistic results of the disruption of signaling by vertical inhibition.
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Affiliation(s)
- Salihanur Darici
- Cellular Signaling Unit, Section of Human Morphology, Department of Biomedical, Metabolic and Neural Sciences, Largo del Pozzo 71, University of Modena and Reggio Emilia, Modena, 41125, Italy; Haemato-Oncology/Systems Medicine Group, Paul O'Gorman Leukaemia Research Centre, Institute of Cancer Sciences, University of Glasgow, Glasgow, G12 0ZD, UK
| | - Heather G Jørgensen
- Haemato-Oncology/Systems Medicine Group, Paul O'Gorman Leukaemia Research Centre, Institute of Cancer Sciences, University of Glasgow, Glasgow, G12 0ZD, UK
| | - Xu Huang
- Haemato-Oncology/Systems Medicine Group, Paul O'Gorman Leukaemia Research Centre, Institute of Cancer Sciences, University of Glasgow, Glasgow, G12 0ZD, UK
| | - Valentina Serafin
- Department of Surgery Oncology and Gastroenterology Oncology and Immunology Section University of Padova, Italy
| | - Ludovica Antolini
- Cellular Signaling Unit, Section of Human Morphology, Department of Biomedical, Metabolic and Neural Sciences, Largo del Pozzo 71, University of Modena and Reggio Emilia, Modena, 41125, Italy
| | - Patrizia Barozzi
- Department of Medical and Surgical Sciences, Section of Hematology, University of Modena and Reggio Emilia, Azienda Ospedaliero-Universitaria Di Modena, Via del Pozzo 71, 41124, Modena, Italy
| | - Mario Luppi
- Department of Medical and Surgical Sciences, Section of Hematology, University of Modena and Reggio Emilia, Azienda Ospedaliero-Universitaria Di Modena, Via del Pozzo 71, 41124, Modena, Italy.
| | - Fabio Forghieri
- Department of Medical and Surgical Sciences, Section of Hematology, University of Modena and Reggio Emilia, Azienda Ospedaliero-Universitaria Di Modena, Via del Pozzo 71, 41124, Modena, Italy.
| | - Sandra Marmiroli
- Cellular Signaling Unit, Section of Human Morphology, Department of Biomedical, Metabolic and Neural Sciences, Largo del Pozzo 71, University of Modena and Reggio Emilia, Modena, 41125, Italy.
| | - Manuela Zavatti
- Cellular Signaling Unit, Section of Human Morphology, Department of Biomedical, Metabolic and Neural Sciences, Largo del Pozzo 71, University of Modena and Reggio Emilia, Modena, 41125, Italy
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Pereira LM, Portapilla GB, Brancini GTP, Possato B, Bronzon da Costa CM, Abreu-Filho PG, Wainwright M, Yatsuda AP, Braga GÚL. The potential of phenothiazinium dyes as cytotoxicity markers in cisplatin-treated cells. Sci Rep 2023; 13:10203. [PMID: 37353536 PMCID: PMC10290130 DOI: 10.1038/s41598-023-36721-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 06/08/2023] [Indexed: 06/25/2023] Open
Abstract
Assessing the in vitro toxicity of compounds on cell cultures is an important step during the screening of candidate molecules for diverse applications. Among the strategies employed to determine cytotoxicity, MTT, neutral red, and resazurin are commonly used. Methylene blue (MB), a phenothiazinium salt, has several uses, such as dye, redox indicator, and even as treatment for human disease and health conditions, such as malaria and methemoglobinemia. However, MB has only been sparsely used as a cellular toxicity indicator. As a viability indicator, MB is mostly applied to fixed cultures at high concentrations, especially when compared to MTT or neutral red. Here we show that MB and its related compounds new methylene blue (NMB), toluidine blue O (TBO), and dimethylmethylene blue (DMMB) can be used as cytotoxicity indicators in live (non-fixed) cells treated for 72 h with DMSO and cisplatin. We compared dye uptake between phenothiazinium dyes and neutral red by analyzing supernatant and cell content via visible spectra scanning and microscopy. All dyes showed a similar ability to assess cell toxicity compared to either MTT or neutral red. Our method represents a cost-effective alternative to in vitro cytotoxicity assays using cisplatin or DMSO, indicating the potential of phenothiazinium dyes for the screening of candidate drugs and other applications.
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Affiliation(s)
- Luiz Miguel Pereira
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av do Café, sn/n, Ribeirão Preto, SP, 14040-903, Brazil
| | - Gisele Bulhões Portapilla
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av do Café, sn/n, Ribeirão Preto, SP, 14040-903, Brazil
| | - Guilherme Thomaz Pereira Brancini
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av do Café, sn/n, Ribeirão Preto, SP, 14040-903, Brazil
| | - Bruna Possato
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av do Café, sn/n, Ribeirão Preto, SP, 14040-903, Brazil
| | - Cássia Mariana Bronzon da Costa
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av do Café, sn/n, Ribeirão Preto, SP, 14040-903, Brazil
| | - Péricles Gama Abreu-Filho
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av do Café, sn/n, Ribeirão Preto, SP, 14040-903, Brazil
| | - Mark Wainwright
- Department of Biology, Edge Hill University, Ormskirk, L39 4QP, UK
| | - Ana Patrícia Yatsuda
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av do Café, sn/n, Ribeirão Preto, SP, 14040-903, Brazil.
- Departamento de Análises Clínicas, Bromatológicas e Toxicológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, 14040-903, Brazil.
| | - Gilberto Úbida Leite Braga
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av do Café, sn/n, Ribeirão Preto, SP, 14040-903, Brazil.
- Departamento de Análises Clínicas, Bromatológicas e Toxicológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, 14040-903, Brazil.
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Uzarski JS, Beck EC, Russell EE, Vanderslice EJ, Holzner ML, Wadhera V, Adamson D, Shapiro R, Davidow DS, Ross JJ, Florman SS. Sustained in vivo perfusion of a re-endothelialized tissue engineered kidney graft in a human-scale animal model. Front Bioeng Biotechnol 2023; 11:1184408. [PMID: 37388767 PMCID: PMC10307518 DOI: 10.3389/fbioe.2023.1184408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Accepted: 05/25/2023] [Indexed: 07/01/2023] Open
Abstract
Introduction: Despite progress in whole-organ decellularization and recellularization, maintaining long-term perfusion in vivo remains a hurdle to realizing clinical translation of bioengineered kidney grafts. The objectives for the present study were to define a threshold glucose consumption rate (GCR) that could be used to predict in vivo graft hemocompatibility and utilize this threshold to assess the in vivo performance of clinically relevant decellularized porcine kidney grafts recellularized with human umbilical vein endothelial cells (HUVECs). Materials and methods: Twenty-two porcine kidneys were decellularized and 19 were re-endothelialized using HUVECs. Functional revascularization of control decellularized (n = 3) and re-endothelialized porcine kidneys (n = 16) was tested using an ex vivo porcine blood flow model to define an appropriate metabolic glucose consumption rate (GCR) threshold above which would sustain patent blood flow. Re-endothelialized grafts (n = 9) were then transplanted into immunosuppressed pigs with perfusion measured using angiography post-implant and on days 3 and 7 with 3 native kidneys used as controls. Patent recellularized kidney grafts underwent histological analysis following explant. Results: The glucose consumption rate of recellularized kidney grafts reached a peak of 39.9 ± 9.7 mg/h at 21 ± 5 days, at which point the grafts were determined to have sufficient histological vascular coverage with endothelial cells. Based on these results, a minimum glucose consumption rate threshold of 20 mg/h was set. The revascularized kidneys had a mean perfusion percentage of 87.7% ± 10.3%, 80.9% ± 33.1%, and 68.5% ± 38.6% post-reperfusion on Days 0, 3 and 7, respectively. The 3 native kidneys had a mean post-perfusion percentage of 98.4% ± 1.6%. These results were not statistically significant. Conclusion: This study is the first to demonstrate that human-scale bioengineered porcine kidney grafts developed via perfusion decellularization and subsequent re-endothelialization using HUVEC can maintain patency with consistent blood flow for up to 7 days in vivo. These results lay the foundation for future research to produce human-scale recellularized kidney grafts for transplantation.
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Affiliation(s)
| | - Emily C. Beck
- Miromatrix Medical Inc., Eden Prairie, MN, United States
| | | | | | - Matthew L. Holzner
- Icahn School of Medicine at Mount Sinai, Recanati/Miller Transplantation Institute, New York, NY, United States
| | - Vikram Wadhera
- Icahn School of Medicine at Mount Sinai, Recanati/Miller Transplantation Institute, New York, NY, United States
| | - Dylan Adamson
- Icahn School of Medicine at Mount Sinai, Recanati/Miller Transplantation Institute, New York, NY, United States
| | - Ron Shapiro
- Icahn School of Medicine at Mount Sinai, Recanati/Miller Transplantation Institute, New York, NY, United States
| | | | - Jeff J. Ross
- Miromatrix Medical Inc., Eden Prairie, MN, United States
| | - Sander S. Florman
- Icahn School of Medicine at Mount Sinai, Recanati/Miller Transplantation Institute, New York, NY, United States
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13
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Ding Q, Ge C, Baker RC, Buchanan RL, Tikekar RV. Assessment of trans-cinnamaldehyde and eugenol assisted heat treatment against Salmonella Typhimurium in low moisture food components. Food Microbiol 2023; 112:104228. [PMID: 36906318 DOI: 10.1016/j.fm.2023.104228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 11/16/2022] [Accepted: 01/21/2023] [Indexed: 01/28/2023]
Abstract
Increased thermal resistance of Salmonella at low water activity (aw) is a significant food safety concern in low-moisture foods (LMFs). We evaluated whether trans-cinnamaldehyde (CA, 1000 ppm) and eugenol (EG, 1000 ppm), which can accelerate thermal inactivation of Salmonella Typhimurium in water, can show similar effect in bacteria adapted to low aw in different LMF components. Although CA and EG significantly accelerated thermal inactivation (55 °C) of S. Typhimurium in whey protein (WP), corn starch (CS) and peanut oil (PO) at 0.9 aw, such effect was not observed in bacteria adapted to lower aw (0.4). The matrix effect on bacterial thermal resistance was observed at 0.9 aw, which was ranked as WP > PO > CS. The effect of heat treatment with CA or EG on bacterial metabolic activity was also partially dependent on the food matrix. Bacteria adapted to lower aw had lower membrane fluidity and unsaturated to saturated fatty acids ratio, suggesting that bacteria at low aw can change its membrane composition to increase its rigidity, thus increasing resistance against the combined treatments. This study demonstrates the effect of aw and food components on the antimicrobials-assisted heat treatment in LMF and provides an insight into the resistance mechanism.
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Affiliation(s)
- Qiao Ding
- Department of Nutrition and Food Science, University of Maryland, 112 Skinner Building, College Park, MD, USA, 20742
| | - Chongtao Ge
- Mars Global Food Safety Center, Beijing, 101047, China
| | | | - Robert L Buchanan
- Department of Nutrition and Food Science, University of Maryland, 112 Skinner Building, College Park, MD, USA, 20742; Center for Food Safety and Security Systems, University of Maryland, College Park, MD, USA, 20742
| | - Rohan V Tikekar
- Department of Nutrition and Food Science, University of Maryland, 112 Skinner Building, College Park, MD, USA, 20742.
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14
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Almeida Roque AD, Neto FF, Cosio C, Barjhoux I, Ribeiro CADO, Rioult D. IMMUNOTOXICITY OF RELEVANT MIXTURES OF PESTICIDES AND METABOLITES ON THP-1 CELLS. Toxicology 2023:153557. [PMID: 37236337 DOI: 10.1016/j.tox.2023.153557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 05/15/2023] [Accepted: 05/24/2023] [Indexed: 05/28/2023]
Abstract
Pesticides are used to combat agricultural pests but also trigger side effects on non-target organisms. Particularly, immune system dysregulation is a major concern due to the organism's increased vulnerability to diseases, including cancer development. Macrophages play essential roles in innate and adaptive immunity and can undergo classical (M1) or alternative (M2) activation. The M1 pro-inflammatory phenotype has an antitumor role, while M2 favors tumor promotion. Although previous studies have linked pesticide exposure to immune compromise, macrophage polarization is still poorly studied. Here, we investigated the effects of 72 h-long exposure to the mixture of four pesticides widely used in Brazil (glyphosate, 2,4-D, mancozeb, and atrazine), and their main metabolites (aminomethylphosphonic acid, 2,4-diclorophenol, ethylenethiourea, and desethylatrazine) on human leukemia monocytic THP-1 cell line at concentrations based on the Acceptable Daily Intake (ADI) value established in the country. The data revealed immunotoxicity related to impaired cell metabolism in all exposed groups, decreased cell attachment (Pes: 10-1; Met: 10-1; Mix: all concentrations), and disturbance in nitric oxide (NO) levels (Met: 10-1, 101; Mix: all concentrations). The polarization of macrophages towards a more pro-tumor M2-like phenotype was also supported by decreased secretion of the pro-inflammatory cytokine TNF-α (Pes 100, 101) and increased IL-8 (Pes 101). These outcomes alert about the risk of pesticide exposure in the Brazilian population.
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Affiliation(s)
- Aliciane De Almeida Roque
- Federal University of Paraná, Department of Cell Biology, Laboratory of Cell Toxicology, PO Box: 19031, CEP: 81531-980, Curitiba, PR, Brazil.
| | - Francisco Filipak Neto
- Federal University of Paraná, Department of Cell Biology, Laboratory of Cell Toxicology, PO Box: 19031, CEP: 81531-980, Curitiba, PR, Brazil
| | - Claudia Cosio
- Université de Reims Champagne-Ardenne, UMR-I 02 INERIS-URCA-ULH SEBIO Stress Environnementaux et BIOsurveillance des milieux aquatiques, 51097 Reims, France
| | - Iris Barjhoux
- Université de Reims Champagne-Ardenne, UMR-I 02 INERIS-URCA-ULH SEBIO Stress Environnementaux et BIOsurveillance des milieux aquatiques, 51097 Reims, France
| | - Ciro Alberto de Oliveira Ribeiro
- Federal University of Paraná, Department of Cell Biology, Laboratory of Cell Toxicology, PO Box: 19031, CEP: 81531-980, Curitiba, PR, Brazil.
| | - Damien Rioult
- Université de Reims Champagne-Ardenne, UMR-I 02 INERIS-URCA-ULH SEBIO Stress Environnementaux et BIOsurveillance des milieux aquatiques, 51097 Reims, France; Université de Reims Champagne-Ardenne, Plateau Technique Mobile de Cytométrie Environnementale MOBICYTE - INERIS, 51097 Reims, France.
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15
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Needs SH, Pivetal J, Hayward J, Kidd SP, Lam H, Diep T, Gill K, Woodward M, Reis NM, Edwards AD. Moving microcapillary antibiotic susceptibility testing (mcAST) towards the clinic: unravelling kinetics of detection of uropathogenic E. coli, mass-manufacturing and usability for detection of urinary tract infections in human urine. SENSORS & DIAGNOSTICS 2023; 2:736-750. [PMID: 37216011 PMCID: PMC10197089 DOI: 10.1039/d2sd00138a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 04/20/2023] [Indexed: 05/24/2023]
Abstract
Innovation in infection based point-of-care (PoC) diagnostics is vital to avoid unnecessary use of antibiotics and the development of antimicrobial resistance. Several groups including our research team have in recent years successfully miniaturised phenotypic antibiotic susceptibility tests (AST) of isolated bacterial strains, providing validation that miniaturised AST can match conventional microbiological methods. Some studies have also shown the feasibility of direct testing (without isolation or purification), specifically for urinary tract infections, paving the way for direct microfluidic AST systems at PoC. As rate of bacteria growth is intrinsically linked to the temperature of incubation, transferring miniaturised AST nearer the patient requires building new capabilities in terms of temperature control at PoC, furthermore widespread clinical use will require mass-manufacturing of microfluidic test strips and direct testing of urine samples. This study shows for the first-time application of microcapillary antibiotic susceptibility testing (mcAST) directly from clinical samples, using minimal equipment and simple liquid handling, and with kinetics of growth recorded using a smartphone camera. A complete PoC-mcAST system was presented and tested using 12 clinical samples sent to a clinical laboratory for microbiological analysis. The test showed 100% accuracy for determining bacteria in urine above the clinical threshold (5 out of 12 positive) and achieved 95% categorical agreement for 5 positive urines tested with 4 antibiotics (nitrofurantoin, ciprofloxacin, trimethoprim and cephalexin) within 6 h compared to the reference standard overnight AST method. A kinetic model is presented for metabolization of resazurin, demonstrating kinetics of degradation of resazurin in microcapillaries follow those observed for a microtiter plate, with time for AST dependent on the initial CFU ml-1 of uropathogenic bacteria in the urine sample. In addition, we show for the first time that use of air-drying for mass-manufacturing and deposition of AST reagents within the inner surface of mcAST strips matches results obtained with standard AST methods. These results take mcAST a step closer to clinical application, for example as PoC support for antibiotic prescription decisions within a day.
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Affiliation(s)
- Sarah H Needs
- Reading School of Pharmacy, University of Reading Whiteknights Campus Reading RG6 6AD UK +44(0)7906014116 +44(0)118 378 4253
| | - Jeremy Pivetal
- Reading School of Pharmacy, University of Reading Whiteknights Campus Reading RG6 6AD UK +44(0)7906014116 +44(0)118 378 4253
| | - Jessica Hayward
- Reading School of Pharmacy, University of Reading Whiteknights Campus Reading RG6 6AD UK +44(0)7906014116 +44(0)118 378 4253
| | - Stephen P Kidd
- Hampshire Hospitals NHS Foundation Trust Basingstoke and North Hampshire Hospital Basingstoke RG24 9NA UK
| | - HoYin Lam
- Hampshire Hospitals NHS Foundation Trust Basingstoke and North Hampshire Hospital Basingstoke RG24 9NA UK
| | - Tai Diep
- Reading School of Pharmacy, University of Reading Whiteknights Campus Reading RG6 6AD UK +44(0)7906014116 +44(0)118 378 4253
| | - Kiran Gill
- Reading School of Pharmacy, University of Reading Whiteknights Campus Reading RG6 6AD UK +44(0)7906014116 +44(0)118 378 4253
| | - Martin Woodward
- Department of Food and Nutrition Sciences, University of Reading Whiteknights Campus Reading RG6 6DX UK
| | - Nuno M Reis
- Department of Chemical Engineering and Centre for Biosensors, Biodevices and Bioelectronics (C3Bio), University of Bath Claverton Down Bath BA2 7AY UK +44(0)1225 383 369
- Capillary Film Technology (CFT) Daux Road Billingshurst RH14 9SJ UK
| | - Alexander D Edwards
- Reading School of Pharmacy, University of Reading Whiteknights Campus Reading RG6 6AD UK +44(0)7906014116 +44(0)118 378 4253
- Capillary Film Technology (CFT) Daux Road Billingshurst RH14 9SJ UK
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16
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Zampieri D, Calabretti A, Romano M, Fortuna S, Collina S, Amata E, Dichiara M, Marrazzo A, Mamolo MG. Cytotoxicity Profiles and Neuroprotective Properties of the Novel Ifenprodil Analogues as Sigma Ligands. Molecules 2023; 28:molecules28083431. [PMID: 37110664 PMCID: PMC10146949 DOI: 10.3390/molecules28083431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Revised: 04/11/2023] [Accepted: 04/11/2023] [Indexed: 04/29/2023] Open
Abstract
Neurodegeneration is a slow and progressive loss of neuronal cells or their function in specific regions of the brain or in the peripheral system. Among several causes responsible for the most common neurodegenerative diseases (NDDs), cholinergic/dopaminergic pathways, but also some endogenous receptors, are often involved. In this context, sigma 1 receptor (S1R) modulators can be used as neuroprotective and antiamnesic agents. Herein, we describe the identification of novel S1R ligands endowed with antioxidant properties, potentially useful as neuroprotective agents. We also computationally assessed how the most promising compounds might interact with the S1R protein's binding sites. The in silico predicted ADME properties suggested that they could be able to cross the brain-blood-barrier (BBB), and to reach the targets. Finally, the observation that at least two novel ifenprodil analogues (5d and 5i) induce an increase of the mRNA levels of the antioxidant NRF2 and SOD1 genes in SH-SY5Y cells suggests that they might be effective agents for protecting neurons against oxidative damage.
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Affiliation(s)
- Daniele Zampieri
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Giorgieri 1, 34127 Trieste, Italy
| | - Antonella Calabretti
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Giorgieri 1, 34127 Trieste, Italy
| | - Maurizio Romano
- Department of Life Sciences, University of Trieste, Via Valerio 28, 34127 Trieste, Italy
| | - Sara Fortuna
- Italian Institute of Technology (IIT), Via E. Melen 83, 16152 Genova, Italy
| | - Simona Collina
- Department of Drug Sciences, Medicinal Chemistry and Pharmaceutical Technology Section, University of Pavia, Viale Taramelli 6 and 12, 27100 Pavia, Italy
| | - Emanuele Amata
- Department of Drug and Health Sciences, University of Catania, Viale Doria 6, 95125 Catania, Italy
| | - Maria Dichiara
- Department of Drug and Health Sciences, University of Catania, Viale Doria 6, 95125 Catania, Italy
| | - Agostino Marrazzo
- Department of Drug and Health Sciences, University of Catania, Viale Doria 6, 95125 Catania, Italy
| | - Maria Grazia Mamolo
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Giorgieri 1, 34127 Trieste, Italy
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17
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Khandaker M, Lane R, Yeakley S, Alizereej H, Nikfarjam S, Ait Moussa A, Vaughan MB, Haleem AM. Evaluation of a Bioabsorbable Scaffold and Interlocked Nail System for Segmental Bone Defect. J Funct Biomater 2023; 14:jfb14040183. [PMID: 37103273 PMCID: PMC10141685 DOI: 10.3390/jfb14040183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 03/22/2023] [Accepted: 03/24/2023] [Indexed: 03/29/2023] Open
Abstract
In the current study, we designed and manufactured a scaffold and fixation system for the reconstruction of long-bone segmental defects in a rabbit tibia model. We used biocompatible and biodegradable materials, polycaprolactone (PCL) and PCL soaked with sodium alginate (PCL-Alg) to manufacture the scaffold, interlocking nail and screws using a phase separation casing method. Degradation and mechanical tests on the PCL and PCL-Alg scaffolds indicated that both were suitable for faster degradation and early weight-bearing capacity. PCL scaffold surface porosity facilitated the infiltration of alginate hydrogel through the scaffold. Cell viability results showed that the number of cells increased on Day 7 and decreased marginally by Day 14. For accurate placement of the scaffold and fixation system, a surgical jig was designed and 3D-printed using biocompatible resin in a stereolithography (SLA) 3D printer, then cured with UV light for increased strength. Our cadaver tests using New Zealand White rabbit confirmed our novel jigs’ potential for accurate placement of the bone scaffold, intramedullary nail and the alignment of the fixation screws in future reconstructive surgeries on rabbit long-bone segmental defects. Additionally, the cadaver tests confirmed that our designed nails and screws were strong enough to carry the surgical insertion force. Therefore, our designed prototype has the potential for further clinical translational study using the rabbit tibia model.
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Affiliation(s)
- Morshed Khandaker
- School of Engineering, University of Central Oklahoma, Edmond, OK 73034, USA
- Correspondence: ; Tel.: +1-405-974-5935; Fax: +1-405-974-3812
| | - Reuben Lane
- School of Engineering, University of Central Oklahoma, Edmond, OK 73034, USA
| | - Shannon Yeakley
- School of Engineering, University of Central Oklahoma, Edmond, OK 73034, USA
| | - Hussein Alizereej
- School of Engineering, University of Central Oklahoma, Edmond, OK 73034, USA
| | - Sadegh Nikfarjam
- Department of Biology, University of Central Oklahoma, Edmond, OK 73034, USA
| | - Abdellah Ait Moussa
- School of Engineering, University of Central Oklahoma, Edmond, OK 73034, USA
| | - Melville B. Vaughan
- Department of Biology, University of Central Oklahoma, Edmond, OK 73034, USA
| | - Amgad M. Haleem
- Department of Orthopedics, University of Oklahoma Health Science Center, Oklahoma City, OK 73104, USA
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18
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Li Y, Wang K, Zhu X, Cheng Z, Zhu L, Murray M, Zhou F. Ginkgo biloba extracts protect human retinal Müller glial cells from t-BHP induced oxidative damage by activating the AMPK-Nrf2-NQO-1 axis. J Pharm Pharmacol 2023; 75:385-396. [PMID: 36583518 DOI: 10.1093/jpp/rgac095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 11/25/2022] [Indexed: 12/31/2022]
Abstract
OBJECTIVES Retinal Müller glial cell loss is almost involved in all retinal diseases, especially diabetic retinopathy (DR). Oxidative stress significantly contributes to the development of Müller glial cell loss. Ginkgo biloba extracts (GBE) have been reported to possess antioxidant property, beneficial in treating human retinal diseases. However, little is known about its role in Müller glial cells. This study investigated the protective effect of GBE (prepared from ginkgo biloba dropping pills) in human Müller glial cells against tert-butyl hydroperoxide (t-BHP)-induced oxidative stress and its underlying molecular mechanism. METHODS MIO-M1 cells were pretreated with or without GBE prior to the exposure to t-BHP-induced oxidative stress. Cell viability, cell death profile and lipid peroxidation were subsequently assessed. Protein expression of the key anti-oxidative signalling factors were investigated. KEY FINDINGS We showed that GBE can effectively protect human MIO-M1 cells from t-BHP-induced oxidative injury by improving cell viability, reducing intracellular ROS accumulation and suppressing lipid peroxidation, which effect is likely mediated through activating AMPK-Nrf2-NQO-1 antioxidant respondent axis. CONCLUSIONS Our study is the first to reveal the great potentials of GBE in protecting human retinal Müller glial cell loss against oxidative stress. GBE might be used to prevent human retinal diseases particularly DR.
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Affiliation(s)
- Yue Li
- The University of Sydney, Sydney Pharmacy School, Faculty of Medicine and Health NSW, 2006, Australia
| | - Ke Wang
- Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu Province, 214063, China
| | - Xue Zhu
- Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu Province, 214063, China
| | - Zhengqi Cheng
- The University of Sydney, Sydney Pharmacy School, Faculty of Medicine and Health NSW, 2006, Australia.,Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, Guangdong, China.,Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangzhou, Guangdong, China
| | - Ling Zhu
- The University of Sydney, Save Sight Institute, Sydney, NSW, 2000, Australia
| | - Michael Murray
- The University of Sydney, Sydney Pharmacy School, Faculty of Medicine and Health NSW, 2006, Australia
| | - Fanfan Zhou
- The University of Sydney, Sydney Pharmacy School, Faculty of Medicine and Health NSW, 2006, Australia
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19
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Vieira-da-Silva B, Castanho MARB. Resazurin Reduction-Based Assays Revisited: Guidelines for Accurate Reporting of Relative Differences on Metabolic Status. Molecules 2023; 28:molecules28052283. [PMID: 36903528 PMCID: PMC10005198 DOI: 10.3390/molecules28052283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 02/21/2023] [Accepted: 02/24/2023] [Indexed: 03/05/2023] Open
Abstract
Cell viability and metabolic activity are ubiquitous parameters used in biochemistry, molecular biology, and biotechnological studies. Virtually all toxicology and pharmacological projects include at some point the evaluation of cell viability and/or metabolic activity. Among the methods used to address cell metabolic activity, resazurin reduction is probably the most common. At variance with resazurin, resorufin is intrinsically fluorescent, which simplifies its detection. Resazurin conversion to resorufin in the presence of cells is used as a reporter of metabolic activity of cells and can be detected by a simple fluorometric assay. UV-Vis absorbance is an alternative technique but is not as sensitive. In contrast to its wide empirical "black box" use, the chemical and cell biology fundamentals of the resazurin assay are underexplored. Resorufin is further converted to other species, which jeopardizes the linearity of the assays, and the interference of extracellular processes has to be accounted for when quantitative bioassays are aimed at. In this work, we revisit the fundamentals of metabolic activity assays based on the reduction of resazurin. Deviation to linearity both in calibration and kinetics, as well as the existence of competing reactions for resazurin and resorufin and their impact on the outcome of the assay, are addressed. In brief, fluorometric ratio assays using low resazurin concentrations obtained from data collected at short time intervals are proposed to ensure reliable conclusions.
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20
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Chang C, Yang H, Bi W, Huang C, Xu Z. Cryopreservable Through-Hole Arrays for the High-Throughput Three-Dimensional Smartphone-Based Cell Colorimetric Assay. ACS Sens 2023; 8:543-554. [PMID: 36705290 DOI: 10.1021/acssensors.2c01564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
In vitro assays are an important platform for cancer research as they allow high-throughput experimentation that is not possible using in vivo animals. Although various in vitro assays are developed to study cell viability or migration, many of these assays are often limited to two dimensions, involving complex procedures or relying specialized equipment, etc. Here, we designed a simple colorimetric assay that accommodates automatic liquid samples loading, high-throughput generation of chemical concentration gradient, three-dimensional (3D) cell culture establishment, and smartphone-based colorimetric readouts. This assay is based on through-hole arrays in the poly(methyl methacrylate) (PMMA) layers. Liquid samples can be automatically loaded into through-hole arrays in PMMA layers by capillary force. Different drug concentrations can be generated by aligning and stacking to mix the contents of the corresponding through-holes with different volumes. 3D culture of cancer cells can be established by the rapid absorption of cell suspensions into the macroporous gels. After exposing the 3D cultured cells to different drug concentrations, the number of viable cells and migrated cells was reflected by the color change of Alamar blue, which enable on-site readout by a smartphone. This assay can study cell viability as well as cell migration, the two main characteristics of cancer cells, using one device. Interestingly, HeLa cells remained with high viability after cryopreservation at -80 °C, which allows for storage and distribution using dry ice. The simple protocol, along with the cryopreservability at -80 °C facilitates its ease of use to study cell viability together with cell migration in common laboratories or clinical settings.
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Affiliation(s)
- Chunqi Chang
- School of Biomedical Engineering Health Science Center, Shenzhen University, Shenzhen 518060, China.,Guangdong Provincial Key Laboratory of Biomedical Measurements and Ultrasound Imaging, Shenzhen University, Shenzhen 518060, China
| | - Haoyi Yang
- School of Biomedical Engineering Health Science Center, Shenzhen University, Shenzhen 518060, China.,Guangdong Provincial Key Laboratory of Biomedical Measurements and Ultrasound Imaging, Shenzhen University, Shenzhen 518060, China
| | - Wenchuan Bi
- School of Biomedical Engineering Health Science Center, Shenzhen University, Shenzhen 518060, China.,Guangdong Provincial Key Laboratory of Biomedical Measurements and Ultrasound Imaging, Shenzhen University, Shenzhen 518060, China
| | - Cuier Huang
- School of Biomedical Engineering Health Science Center, Shenzhen University, Shenzhen 518060, China.,Guangdong Provincial Key Laboratory of Biomedical Measurements and Ultrasound Imaging, Shenzhen University, Shenzhen 518060, China
| | - Zhen Xu
- School of Biomedical Engineering Health Science Center, Shenzhen University, Shenzhen 518060, China.,Guangdong Provincial Key Laboratory of Biomedical Measurements and Ultrasound Imaging, Shenzhen University, Shenzhen 518060, China.,Guangdong Key Laboratory of Nanomedicine, Shenzhen Engineering Laboratory of Nanomedicine and Nanoformulations, CAS-HK Joint Lab for Biomaterials, Research Laboratory for Biomedical Optics and Molecular Imaging, Shenzhen Key Laboratory for Molecular Imaging, CAS Key Lab for Health Informatics, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
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21
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Li Y, Zhu X, Wang K, Zhu L, Murray M, Zhou F. Ginkgo biloba extracts (GBE) protect human RPE cells from t-BHP-induced oxidative stress and necrosis by activating the Nrf2-mediated antioxidant defence. J Pharm Pharmacol 2023; 75:105-116. [PMID: 36190376 DOI: 10.1093/jpp/rgac069] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 08/23/2022] [Indexed: 02/03/2023]
Abstract
OBJECTIVES Age-related macular degeneration (AMD) is a prevalent ocular disease. Dry AMD accounts for most cases of blindness associated with AMD but there are no treatments. Oxidative stress-induced damage to retinal pigment epithelial (RPE) cells is a major contributor to the pathogenesis of dry AMD. This study investigated the protective actions of Ginkgo biloba extracts (GBE) in human RPE cells subjected to tert-butyl hydroperoxide (t-BHP)-mediated oxidative stress. METHODS The human ARPE-19 cells were pre-treated with or without GBE before the exposure to t-BHP. Cell viability, cell death profile and lipid peroxidation were assessed. The findings were verified using human primary RPE cultures. KEY FINDINGS GBE pre-treatment prevented the increase in lipid peroxidation and necrosis/ferroptosis, and the concurrent viability decrease in RPE cells exposed to t-BHP. It enabled the pronounced activation of Nrf2 and its downstream genes. We found that ERK1/2 phosphorylation was increased to a similar extent by t-BHP and GBE. CONCLUSION This study revealed that GBE pre-treatment attenuates pro-oxidant stress and protects human RPE cells from oxidative injury by modulating ERK1/2-Nrf2 axis. These findings suggest that GBE has the potential to be developed as a agent that may be valuable in decreasing AMD progression.
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Affiliation(s)
- Yue Li
- Sydney Pharmacy School, Faculty of Medicine and Health NSW, The University of Sydney, Sydney, NSW, Australia
| | - Xue Zhu
- Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu, China
| | - Ke Wang
- Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu, China
| | - Ling Zhu
- Save Sight Institute, The University of Sydney, Sydney, NSW, Australia
| | - Michael Murray
- Sydney Pharmacy School, Faculty of Medicine and Health NSW, The University of Sydney, Sydney, NSW, Australia
| | - Fanfan Zhou
- Sydney Pharmacy School, Faculty of Medicine and Health NSW, The University of Sydney, Sydney, NSW, Australia
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Chu S, Moujaber O, Lemay S, Stochaj U. Multiple pathways promote microtubule stabilization in senescent intestinal epithelial cells. NPJ AGING 2022; 8:16. [PMID: 36526654 PMCID: PMC9758230 DOI: 10.1038/s41514-022-00097-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Accepted: 11/25/2022] [Indexed: 12/23/2022]
Abstract
Intestinal epithelial cells are critical for gastrointestinal homeostasis. However, their function declines during aging. The aging-related loss of organ performance is largely driven by the increase in senescent cells. To date, the hallmarks and molecular mechanisms related to cellular senescence are not fully understood. Microtubules control epithelial functions, and we identified microtubule stabilization as a phenotypic marker of senescent intestinal epithelial cells. The senescence inducer determined the pathway to microtubule stabilization. Specifically, enhanced microtubule stability was associated with α-tubulin hyperacetylation or increased abundance of the microtubule-binding protein tau. We show further that overexpression of MAPT, which encodes tau, augmented microtubule stability in intestinal epithelial cells. Notably, pharmacological microtubule stabilization was sufficient to induce cellular senescence. Taken together, this study provides new insights into the molecular mechanisms that control epithelial cell homeostasis. Our results support the concept that microtubule stability serves as a critical cue to trigger intestinal epithelial cell senescence.
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Affiliation(s)
- Siwei Chu
- grid.14709.3b0000 0004 1936 8649Department of Physiology, McGill University, Montreal, Quebec H3G 1Y6 Canada
| | - Ossama Moujaber
- grid.14709.3b0000 0004 1936 8649Department of Physiology, McGill University, Montreal, Quebec H3G 1Y6 Canada
| | - Serge Lemay
- grid.63984.300000 0000 9064 4811Department of Medicine, Division of Nephrology, McGill University Health Centre, Montreal, QC Canada
| | - Ursula Stochaj
- grid.14709.3b0000 0004 1936 8649Department of Physiology, McGill University, Montreal, Quebec H3G 1Y6 Canada
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Sosnoski D, Dietz P, Bou-akl T, Ren WP, Markel D. Irrigation Solutions Negatively Affect the Viability and Function of Human Fibroblasts: An in vitro Study. Biomed Hub 2022; 7:165-172. [PMID: 36643380 PMCID: PMC9834643 DOI: 10.1159/000527110] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Accepted: 07/15/2022] [Indexed: 12/12/2022] Open
Abstract
Introduction Multiple irrigation solutions are used in orthopedic surgeries although there are limited studies on their lasting effects on human tissues. The purpose of this work was to investigate the cytotoxic effects of the irrigation solutions Bacitracin, Clorpactin (sodium oxychlorosene), Irrisept (0.05% chlorhexidine gluconate), and Bactisure (ethanol 1%, acetic acid 0.6%, sodium acetate 0.2%, benzalkonium chloride 0.013%, and water) on 3D cultures of human fibroblasts. Methods Two independent experiments with 6 replicates were performed for the following conditions: Control (saline), bacitracin, Clorpactin, Irrisept, and Bactisure. Human fibroblast cell sheets were exposed to these solutions (1 or 2 min), followed by three washes with warm saline. Cell sheets were then cultured for additional 5- and 7-day posttreatment. Cell viability was measured using the alamarBlue (AB) assay. The more cytotoxic the irrigant, the lower the AB reduction. Results For 1-min exposure time, significant differences in AB reduction were noted in Clorpactin, Irrisept, and Bactisure groups compared to control at both 5 days (Clorpactin p = 0.0003, Irrisept p = 7.31 × 10-15, Bactisure p = 6.86 × 10-14) and 7 days posttreatment (all groups p < 0.0001). The results were similar in the 2-min exposure groups. Bacitracin-treated fibroblasts displayed no significant difference at all measurement times compared to control. Discussion Impacts of irrigation solution exposure on cell viability were varied. Irrisept and Bactisure showed the highest cell toxicity even after a brief exposure (1 min), while bacitracin and Clor-pactin exposure showed smaller impacts on cell viability as compared to saline controls. This in vitro study provided insight into the effects of the irrigants on human cells and provides the groundwork essential to move to in vivo studies. Our findings raised the concern that some irrigation solutions may have negative impacts on wound healing and healthy cellular response.
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Affiliation(s)
- David Sosnoski
- Michigan State University, East Lansing, Michigan, USA,*David Sosnoski,
| | - Paula Dietz
- Ascension Providence Hospital, Southfield, Michigan, USA
| | - Therese Bou-akl
- Ascension Providence Hospital, Southfield, Michigan, USA,Wayne State University, Detroit, Michigan, USA
| | - Wei-Ping Ren
- Ascension Providence Hospital, Southfield, Michigan, USA,Wayne State University, Detroit, Michigan, USA
| | - David Markel
- Michigan State University, East Lansing, Michigan, USA,Ascension Providence Hospital, Southfield, Michigan, USA,Wayne State University, Detroit, Michigan, USA
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Zampieri D, Fortuna S, Romano M, De Logu A, Cabiddu G, Sanna A, Mamolo MG. Synthesis, Biological Evaluation and Computational Studies of New Hydrazide Derivatives Containing 1,3,4-Oxadiazole as Antitubercular Agents. Int J Mol Sci 2022; 23:ijms232315295. [PMID: 36499618 PMCID: PMC9735621 DOI: 10.3390/ijms232315295] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 11/30/2022] [Accepted: 12/01/2022] [Indexed: 12/08/2022] Open
Abstract
To extend our screening for novel antimycobacterial molecules, we have designed, synthesized, and biologically evaluated a library of 14 new hydrazide derivatives containing 1,3,4-oxadiazole core. A variety of mycobacterial strains, including some drug-resistant strains, were tested for antimycobacterial activity. Among the compounds tested, five showed high antimycobacterial activity (MIC values of 8 μg/mL) against M. tuberculosis H37Ra attenuated strain, and two derivatives were effective (MIC of 4 µg/mL) against pyrazinamide-resistant strains. Furthermore, the novel compounds were tested against the fungal C. albicans strain, showing no antimycotic activity, and thus demonstrating a good selectivity profile. Notably, they also exhibited low cytotoxicity against human SH-SY5Y cells. The molecular modeling carried out suggested a plausible mechanism of action towards the active site of the InhA enzyme, which confirmed our hypothesis. In conclusion, the active compounds were predicted in silico for ADME properties, and all proved to be potentially orally absorbed in humans.
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Affiliation(s)
- Daniele Zampieri
- Department of Chemistry and Pharmaceutical Sciences, University of Trieste, Via Giorgieri 1, 34127 Trieste, Italy
- Correspondence: ; Tel.: +39-040-5583677
| | - Sara Fortuna
- Italian Institute of Technology (IIT), Via E. Melen 83, 16152 Genova, Italy
| | - Maurizio Romano
- Department of Life Sciences, University of Trieste, Via Valerio 28/1, 34127 Trieste, Italy
| | - Alessandro De Logu
- Department of Life and Environmental Sciences, Section of Microbiology, University of Cagliari, 09042 Monserrato, Italy
| | - Gianluigi Cabiddu
- Department of Life and Environmental Sciences, Section of Microbiology, University of Cagliari, 09042 Monserrato, Italy
| | - Adriana Sanna
- Department of Public Health, Clinical and Molecular Medicine, University of Cagliari, 09042 Monserrato, Italy
| | - Maria Grazia Mamolo
- Department of Chemistry and Pharmaceutical Sciences, University of Trieste, Via Giorgieri 1, 34127 Trieste, Italy
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Suárez DF, Pinzón-García AD, Sinisterra RD, Dussan A, Mesa F, Ramírez-Clavijo S. Uniaxial and Coaxial Nanofibers PCL/Alginate or PCL/Gelatine Transport and Release Tamoxifen and Curcumin Affecting the Viability of MCF7 Cell Line. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:nano12193348. [PMID: 36234476 PMCID: PMC9565524 DOI: 10.3390/nano12193348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 08/31/2022] [Accepted: 09/09/2022] [Indexed: 05/11/2023]
Abstract
Breast cancer is the second cause of cancer death in women worldwide. The search for therapeutic and preventive alternatives has increased in recent years. One synthetic drug for patients with hormone receptor-positive tumours is tamoxifen citrate (TMX). Curcumin (Cur) is a natural compound that is being tested. Both were coupled with nanoscale-controlled and sustained release systems to increase the effectiveness of the treatment and reduce adverse effects. We produced a controlled release system based on uniaxial and coaxial polymeric nanofibers of polycaprolactone (PCL), alginate (Alg) and gelatine (Gel) for the transport and release of TMX and Cur, as a new alternative to breast cancer treatment. Nanofibers combining PCL-Alg and PCL-Gel were fabricated by the electrospinning technique and physicochemically characterised by thermal analysis, absorption spectroscopy in the infrared region and X-ray diffraction. Morphology and size were studied by scanning electron microscopy. Additionally, the release profile of TMX and Cur was obtained by UV-Vis spectroscopy. Additionally, the cytotoxic effect on breast cancer cell line MCF7 and peripheral-blood mononuclear cells (PBMCs) from a healthy donor were evaluated by a Resazurin reduction assay. These assays showed that PCL-TMX nanofiber was highly toxic to both cell types, while PCL-Cur was less toxic.
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Affiliation(s)
- Diego Fernando Suárez
- Chemistry Department, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Av. Presidente Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil
| | - Ana Delia Pinzón-García
- Chemistry Department, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Av. Presidente Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil
| | - Rubén Darío Sinisterra
- Chemistry Department, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Av. Presidente Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil
| | - Anderson Dussan
- Departamento de Física, Grupo de Materiales Nanoestructurados y sus Aplicaciones, Universidad Nacional de Colombia, Bogotá 110011, Colombia
| | - Fredy Mesa
- Departamento de Física, Grupo de Materiales Nanoestructurados y sus Aplicaciones, Universidad Nacional de Colombia, Bogotá 110011, Colombia
| | - Sandra Ramírez-Clavijo
- Department of Biology, Grupo Ciencias Básicas Médicas, Faculty of Natural Science, Universidad del Rosario, Bogotá 110311, Colombia
- Correspondence:
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Espitia-Quiroz LC, Fernández-Orjuela AL, Anaya-Sampayo LM, Acosta-Gómez AP, Sequeda-Castañeda LG, Gutiérrez-Prieto SJ, Roa-Molina NS, García-Robayo DA. Viability and Adhesion of Periodontal Ligament Fibroblasts on a Hydroxyapatite Scaffold Combined with Collagen, Polylactic Acid-Polyglycolic Acid Copolymer and Platelet-Rich Fibrin: A Preclinical Pilot Study. Dent J (Basel) 2022; 10:dj10090167. [PMID: 36135161 PMCID: PMC9497794 DOI: 10.3390/dj10090167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Revised: 08/24/2022] [Accepted: 08/31/2022] [Indexed: 11/17/2022] Open
Abstract
Background: Conventional periodontal therapy relies on bone regeneration strategies utilizing scaffolds made of diverse materials, among which collagen, to promote cell adhesion and growth. Objective: To evaluate periodontal ligament fibroblast (HPdLF) cell adhesion and viability for periodontal regeneration purposes on hydroxyapatite scaffolds containing collagen (HAp-egg shell) combined with polylactic acid−polyglycolic acid copolymer (PLGA) and Platelet-Rich Fibrin (PRF). Methods: Four variations of the HAp-egg shell were used to seed HPdLF for 24 h and evaluate cell viability through a live/dead assay: (1) (HAp-egg shell/PLGA), (2) (HAp-egg shell/PLGA + collagen), (3) (HAp-egg shell/PLGA + PRF) and (4) (HAp-egg shell/PLGA + PRF + collagen). Cell adhesion and viability were determined using confocal microscopy and quantified using central tendency and dispersion measurements; significant differences were determined using ANOVA (p < 0.05). Results: Group 1 presented low cell viability and adhesion (3.70−10.17%); groups 2 and 3 presented high cell viability and low cell adhesion (group 2, 59.2−11.1%, group 3, 58−4.6%); group 4 presented the highest cell viability (82.8%) and moderate cell adhesion (45%) (p = 0.474). Conclusions: The effect of collagen on the HAp-egg shell/PLGA scaffold combined with PRF favored HPdLF cell adhesion and viability and could clinically have a positive effect on bone defect resolution and the regeneration of periodontal ligament tissue.
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Affiliation(s)
- Leonor C. Espitia-Quiroz
- Resident in Periodontics, Dentistry Faculty, Pontificia Universidad Javeriana, Bogota 110231, Colombia
- Dentistry Faculty, Universidad Popular Autónoma del Estado de Puebla, Puebla 72410, Mexico
| | | | - Lina M. Anaya-Sampayo
- Dentistry Research Center, Dentistry Faculty, Pontificia Universidad Javeriana, Bogota 110231, Colombia
| | - Adriana P. Acosta-Gómez
- Periodontal System Department, Dentistry Faculty, Pontificia Universidad Javeriana, Bogota 110231, Colombia
| | - Luis Gonzalo Sequeda-Castañeda
- Dentistry Research Center, Dentistry Faculty, Pontificia Universidad Javeriana, Bogota 110231, Colombia
- Chemistry Department, Sciences Faculty, Pontificia Universidad Javeriana, Bogota 110231, Colombia
- Correspondence: (L.G.S.-C.); (S.J.G.-P.); (D.A.G.-R.)
| | - Sandra Janeth Gutiérrez-Prieto
- Dentistry Research Center, Dentistry Faculty, Pontificia Universidad Javeriana, Bogota 110231, Colombia
- Dental System Department, Dentistry Faculty, Pontificia Universidad Javeriana, Bogota 110231, Colombia
- Correspondence: (L.G.S.-C.); (S.J.G.-P.); (D.A.G.-R.)
| | - Nelly S. Roa-Molina
- Dentistry Research Center, Dentistry Faculty, Pontificia Universidad Javeriana, Bogota 110231, Colombia
- Oral System Department, Dentistry Faculty, Pontificia Universidad Javeriana, Bogota 110231, Colombia
| | - Dabeiba A. García-Robayo
- Dentistry Research Center, Dentistry Faculty, Pontificia Universidad Javeriana, Bogota 110231, Colombia
- Oral System Department, Dentistry Faculty, Pontificia Universidad Javeriana, Bogota 110231, Colombia
- Correspondence: (L.G.S.-C.); (S.J.G.-P.); (D.A.G.-R.)
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Heidari-Khoei H, Esfandiari F, Moini A, Yari S, Saber M, Novin MG, Piryaei A, Baharvand H. Derivation of hormone-responsive human endometrial organoids and stromal cells from cryopreserved biopsies. Exp Cell Res 2022; 417:113205. [PMID: 35568073 DOI: 10.1016/j.yexcr.2022.113205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 04/28/2022] [Accepted: 05/08/2022] [Indexed: 11/04/2022]
Abstract
The human endometrium is a dynamic tissue that undergoes cyclic changes in response to sex steroid hormones to provide a receptive status for embryo implantation. Disruptions in this behavior may lead to implantation failure and infertility; therefore, it is essential to develop an appropriate in vitro model to study endometrial changes in response to sex hormones. In this regard, the first choice would be human endometrial cells isolated from biopsies that could be used as monolayer cell sheets or to generate endometrial organoids. However, the need for fresh samples and short-time viability of harvested endometrial biopsy limits these approaches. In order to overcome these limitations, we sought to develop an efficient, simple, robust and reproducible method to cryopreserve human endometrial biopsies that could be stored and/or shipped frozen and later thawed to generate endometrial organoids and endometrial stromal cells (EnSCs). These cryopreserved biopsies could be thawed and used to generate simple endometrial organoids or organoids for co-culture with matched stromal cells that are functionally responsive to sex hormones as similar as the organoids generated from fresh biopsy. An optimal endometrial tissue cryopreservation method would allow the possibility for endometrial tissue biobanking to enable future organoid generation from both healthy tissues and pathological conditions, and open new venues for generate endometrial assembloids, consisting of epithelial organoids and primary stromal cells.
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Affiliation(s)
- Heidar Heidari-Khoei
- Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Fereshteh Esfandiari
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Ashraf Moini
- Department of Endocrinology and Female Infertility, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran; Department of Obstetrics and Gynecology, Arash Women's Hospital, Tehran University of Medical Sciences, Tehran, Iran; Breast Disease Research Center (BDRS), Tehran University of Medical Sciences, Tehran, Iran
| | - Simin Yari
- Department of Endocrinology and Female Infertility, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Maryam Saber
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Marefat Ghaffari Novin
- Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Abbas Piryaei
- Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran; Urogenital Stem Cell Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Hossein Baharvand
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran; Department of Developmental Biology, School of Basic Sciences and Advanced Technologies in Biology, University of Science and Culture, Tehran, Iran.
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Quero J, Ballesteros LF, Ferreira-Santos P, Velderrain-Rodriguez GR, Rocha CMR, Pereira RN, Teixeira JA, Martin-Belloso O, Osada J, Rodríguez-Yoldi MJ. Unveiling the Antioxidant Therapeutic Functionality of Sustainable Olive Pomace Active Ingredients. Antioxidants (Basel) 2022; 11:antiox11050828. [PMID: 35624692 PMCID: PMC9137791 DOI: 10.3390/antiox11050828] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 04/18/2022] [Accepted: 04/19/2022] [Indexed: 12/11/2022] Open
Abstract
Olive pomace (OP) is the main residue that results from olive oil production. OP is rich in bioactive compounds, including polyphenols, so its use in the treatments of diseases related to oxidative stress, such as cancer, could be considered. The present work aimed to study the biological properties of different OP extracts, obtained by ohmic heating-assisted extraction and conventional heating, using water and 50% ethanol, in the treatment and prevention of colorectal cancer through Caco-2 cell models. Additionally, an in-silico analysis was performed to identify the phenolic intestinal absorption and Caco-2 permeability. The extracts were chemically characterized, and it was found that the Ohmic-hydroethanolic (OH-EtOH) extract had the highest antiproliferative effect, probably due to its higher content of phenolic compounds. The OH-EtOH induced potential modifications in the mitochondrial membrane and led to apoptosis by cell cycle arrest in the G1/S phases with activation of p53 and caspase 3 proteins. In addition, this extract protected the intestine against oxidative stress (ROS) caused by H2O2. Therefore, the bioactive compounds present in OP and recovered by applying a green technology such as ohmic-heating, show promising potential to be used in food, nutraceutical, and biomedical applications, reducing this waste and facilitating the circular economy.
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Affiliation(s)
- Javier Quero
- Department of Pharmacology and Physiology, Forensic and Legal Medicine Veterinary Faculty, University of Zaragoza, 50013 Zaragoza, Spain;
| | - Lina F. Ballesteros
- CEB-Centre of Biological Engineering, Campus de Gualtar, University of Minho, 4710-057 Braga, Portugal; (L.F.B.); (P.F.-S.); (C.M.R.R.); (R.N.P.); (J.A.T.)
- LABBELS–Associate Laboratory, 4710-057 Braga, Portugal
| | - Pedro Ferreira-Santos
- CEB-Centre of Biological Engineering, Campus de Gualtar, University of Minho, 4710-057 Braga, Portugal; (L.F.B.); (P.F.-S.); (C.M.R.R.); (R.N.P.); (J.A.T.)
- LABBELS–Associate Laboratory, 4710-057 Braga, Portugal
| | - Gustavo R. Velderrain-Rodriguez
- Alianza Latinoamericana de Nutricion Responsable Inc., 400 E Randolph St Suite 2305, Chicago, IL 60611, USA;
- Department of Food Technology, University of Lleida-Agrotecnio Center, Av. Alcalde Rovira Roure 191, 25198 Lleida, Spain;
| | - Cristina M. R. Rocha
- CEB-Centre of Biological Engineering, Campus de Gualtar, University of Minho, 4710-057 Braga, Portugal; (L.F.B.); (P.F.-S.); (C.M.R.R.); (R.N.P.); (J.A.T.)
- LABBELS–Associate Laboratory, 4710-057 Braga, Portugal
| | - Ricardo N. Pereira
- CEB-Centre of Biological Engineering, Campus de Gualtar, University of Minho, 4710-057 Braga, Portugal; (L.F.B.); (P.F.-S.); (C.M.R.R.); (R.N.P.); (J.A.T.)
- LABBELS–Associate Laboratory, 4710-057 Braga, Portugal
| | - José A. Teixeira
- CEB-Centre of Biological Engineering, Campus de Gualtar, University of Minho, 4710-057 Braga, Portugal; (L.F.B.); (P.F.-S.); (C.M.R.R.); (R.N.P.); (J.A.T.)
- LABBELS–Associate Laboratory, 4710-057 Braga, Portugal
| | - Olga Martin-Belloso
- Department of Food Technology, University of Lleida-Agrotecnio Center, Av. Alcalde Rovira Roure 191, 25198 Lleida, Spain;
| | - Jesús Osada
- Department of Biochemistry and Molecular and Cell Biology, Veterinary Faculty, University of Zaragoza, 50013 Zaragoza, Spain;
- CIBERobn, ISCIII, 28029 Madrtid, Spain
- IIS Aragón, IA2, 50013 Zaragoza, Spain
| | - María Jesús Rodríguez-Yoldi
- Department of Pharmacology and Physiology, Forensic and Legal Medicine Veterinary Faculty, University of Zaragoza, 50013 Zaragoza, Spain;
- CIBERobn, ISCIII, 28029 Madrtid, Spain
- IIS Aragón, IA2, 50013 Zaragoza, Spain
- Correspondence: ; Tel.: +34-976-761649
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Ambati S, Pham T, Lewis ZA, Lin X, Meagher RB. DC-SIGN targets amphotericin B-loaded liposomes to diverse pathogenic fungi. Fungal Biol Biotechnol 2021; 8:22. [PMID: 34952645 PMCID: PMC8709943 DOI: 10.1186/s40694-021-00126-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 11/17/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Life-threatening invasive fungal infections are treated with antifungal drugs such as Amphotericin B (AmB) loaded liposomes. Our goal herein was to show that targeting liposomal AmB to fungal cells with the C-type lectin pathogen recognition receptor DC-SIGN improves antifungal activity. DC-SIGN binds variously crosslinked mannose-rich and fucosylated glycans and lipomannans that are expressed by helminth, protist, fungal, bacterial and viral pathogens including three of the most life-threatening fungi, Aspergillus fumigatus, Candida albicans and Cryptococcus neoformans. Ligand recognition by human DC-SIGN is provided by a carbohydrate recognition domain (CRD) linked to the membrane transit and signaling sequences. Different combinations of the eight neck repeats (NR1 to NR8) expressed in different protein isoforms may alter the orientation of the CRD to enhance its binding to different glycans. RESULTS We prepared two recombinant isoforms combining the CRD with NR1 and NR2 in isoform DCS12 and with NR7 and NR8 in isoform DCS78 and coupled them to a lipid carrier. These constructs were inserted into the membrane of pegylated AmB loaded liposomes AmB-LLs to produce DCS12-AmB-LLs and DCS78-AmB-LLs. Relative to AmB-LLs and Bovine Serum Albumin coated BSA-AmB-LLs, DCS12-AmB-LLs and DCS78-AmB-LLs bound more efficiently to the exopolysaccharide matrices produced by A. fumigatus, C. albicans and C. neoformans in vitro, with DCS12-AmB-LLs performing better than DCS78-AmB-LLs. DCS12-AmB-LLs inhibited and/or killed all three species in vitro significantly better than AmB-LLs or BSA-AmB-LLs. In mouse models of invasive candidiasis and pulmonary aspergillosis, one low dose of DCS12-AmB-LLs significantly reduced the fungal burden in the kidneys and lungs, respectively, several-fold relative to AmB-LLs. CONCLUSIONS DC-SIGN's CRD specifically targeted antifungal liposomes to three highly evolutionarily diverse pathogenic fungi and enhanced the antifungal efficacy of liposomal AmB both in vitro and in vivo. Targeting significantly reduced the effective dose of antifungal drug, which may reduce drug toxicity, be effective in overcoming dose dependent drug resistance, and more effectively kill persister cells. In addition to fungi, DC-SIGN targeting of liposomal packaged anti-infectives have the potential to alter treatment paradigms for a wide variety of pathogens from different kingdoms including protozoans, helminths, bacteria, and viruses which express its cognate ligands.
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Affiliation(s)
- Suresh Ambati
- Department of Genetics, University of Georgia, Athens, GA, 30602, USA.
| | - Tuyetnhu Pham
- Department of Microbiology, University of Georgia, Athens, GA, 30602, USA
| | - Zachary A Lewis
- Department of Microbiology, University of Georgia, Athens, GA, 30602, USA
| | - Xiaorong Lin
- Department of Microbiology, University of Georgia, Athens, GA, 30602, USA
| | - Richard B Meagher
- Department of Genetics, University of Georgia, Athens, GA, 30602, USA
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Pinzón-García AD, Sinisterra R, Cortes M, Mesa F, Ramírez-Clavijo S. Polycaprolactone nanofibers as an adjuvant strategy for Tamoxifen release and their cytotoxicity on breast cancer cells. PeerJ 2021; 9:e12124. [PMID: 34760343 PMCID: PMC8556714 DOI: 10.7717/peerj.12124] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Accepted: 08/17/2021] [Indexed: 12/15/2022] Open
Abstract
Breast cancer is the second leading cause of death in women, and tamoxifen citrate (TMX) is accepted widely for the treatment of hormone receptor-positive breast cancers. Several local drug-delivery systems, including nanofibers, have been developed for antitumor treatment. Nanofibers are biomaterials that mimic the natural extracellular matrix, and they have been used as controlled release devices because they enable highly efficient drug loading. The purpose of the present study was to develop polycaprolactone (PCL) nanofibers incorporating TMX for use in the treatment of breast tumors. Pristine PCL and PCL-TMX nanofibers were produced by electrospinning and characterized physiochemically using different techniques. In addition, an in vitro study of TMX release from the nanofibers was performed. The PCL-TMX nanofibers showed sustained TMX release up to 14 h, releasing 100% of the TMX. The Resazurin reduction assay was used to evaluate the TMX cytotoxicity on MCF-7 breast cancer cell line and PBMCs human. The PCL-TMX nanofiber was cytotoxic toPBMCs and MCF-7. Based on these results, the PCL-TMX nanofibers developed have potential as an alternative for local chronic TMX use for breast cancer treatment, however tissue tests must be done.
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Affiliation(s)
- Ana D Pinzón-García
- Chemistry Department, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Ruben Sinisterra
- Chemistry Department, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Maria Cortes
- Restorative Dentistry Department, Faculty of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Fredy Mesa
- Faculty of Natural Sciences, Department of Biology, Universidad del Rosario, Bogotá, Colombia
| | - Sandra Ramírez-Clavijo
- Faculty of Natural Sciences, Department of Biology, Universidad del Rosario, Bogotá, Colombia
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Darici S, Zavatti M, Braglia L, Accordi B, Serafin V, Horne GA, Manzoli L, Palumbo C, Huang X, Jørgensen HG, Marmiroli S. Synergistic cytotoxicity of dual PI3K/mTOR and FLT3 inhibition in FLT3-ITD AML cells. Adv Biol Regul 2021; 82:100830. [PMID: 34555701 DOI: 10.1016/j.jbior.2021.100830] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 09/09/2021] [Accepted: 09/13/2021] [Indexed: 01/17/2023]
Abstract
Acute myeloid leukemia (AML) is an aggressive hematopoietic malignancy, characterized by a heterogeneous genetic landscape and complex clonal evolution, with poor outcomes. Mutation at the internal tandem duplication of FLT3 (FLT3-ITD) is one of the most common somatic alterations in AML, associated with high relapse rates and poor survival due to the constitutive activation of the FLT3 receptor tyrosine kinase and its downstream effectors, such as PI3K signaling. Thus, aberrantly activated FLT3-kinase is regarded as an attractive target for therapy for this AML subtype, and a number of small molecule inhibitors of this kinase have been identified, some of which are approved for clinical practice. Nevertheless, acquired resistance to these molecules is often observed, leading to severe clinical outcomes. Therapeutic strategies to tackle resistance include combining FLT3 inhibitors with other antileukemic agents. Here, we report on the preclinical activity of the combination of the FLT3 inhibitor quizartinib with the dual PI3K/mTOR inhibitor PF-04691502 in FLT3-ITD cells. Briefly, we show that the association of these two molecules displays synergistic cytotoxicity in vitro in FLT3-ITD AML cells, triggering 90% cell death at nanomolar concentrations after 48 h.
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Affiliation(s)
- Salihanur Darici
- Cellular Signaling Unit, Section of Human Morphology, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, 41125, Italy; Haemato-Oncology/Systems Medicine Group, Paul O'Gorman Leukaemia Research Centre, Institute of Cancer Sciences, University of Glasgow, Glasgow, G12 0ZD, UK
| | - Manuela Zavatti
- Cellular Signaling Unit, Section of Human Morphology, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, 41125, Italy
| | - Luca Braglia
- Cellular Signaling Unit, Section of Human Morphology, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, 41125, Italy; Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Benedetta Accordi
- Department of Woman and Child Health, Haemato-Oncology Laboratory, University of Padua, Via Giustiniani 3 and IRP Città Della Speranza, Corso Stati Uniti 4, 35128, Padua, Italy
| | - Valentina Serafin
- Department of Woman and Child Health, Haemato-Oncology Laboratory, University of Padua, Via Giustiniani 3 and IRP Città Della Speranza, Corso Stati Uniti 4, 35128, Padua, Italy
| | - Gillian A Horne
- Haemato-Oncology/Systems Medicine Group, Paul O'Gorman Leukaemia Research Centre, Institute of Cancer Sciences, University of Glasgow, Glasgow, G12 0ZD, UK
| | - Lucia Manzoli
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Carla Palumbo
- Cellular Signaling Unit, Section of Human Morphology, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, 41125, Italy
| | - Xu Huang
- Haemato-Oncology/Systems Medicine Group, Paul O'Gorman Leukaemia Research Centre, Institute of Cancer Sciences, University of Glasgow, Glasgow, G12 0ZD, UK.
| | - Heather G Jørgensen
- Haemato-Oncology/Systems Medicine Group, Paul O'Gorman Leukaemia Research Centre, Institute of Cancer Sciences, University of Glasgow, Glasgow, G12 0ZD, UK
| | - Sandra Marmiroli
- Cellular Signaling Unit, Section of Human Morphology, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, 41125, Italy.
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Young BM, Antczak LAM, Shankar K, Heise RL. A Two-Step Bioreactor for Decellularized Lung Epithelialization. Cells Tissues Organs 2021; 210:301-310. [PMID: 34500450 DOI: 10.1159/000517622] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 05/30/2021] [Indexed: 11/19/2022] Open
Abstract
Bioreactors for the reseeding of decellularized lung scaffolds have evolved with various advancements, including biomimetic mechanical stimulation, constant nutrient flow, multi-output monitoring, and large mammal scaling. Although dynamic bioreactors are not new to the field of lung bioengineering, ideal conditions during cell seeding have not been extensively studied or controlled. To address the lack of cell dispersal in traditional seeding methods, we have designed a two-step bioreactor. The first step is a novel system that rotates a seeded lung every 20 min at different angles in a sequence designed to anchor 20% of cells to a particular location based on the known rate of attachment. The second step involves perfusion-ventilation culture to ensure nutrient dispersion and cellular growth. Compared to statically seeded lungs, rotationally seeded lungs had significantly increased dsDNA content and more uniform cellular distribution after perfusion and ventilation had been administered. The addition of this novel seeding system before traditional culture methods will aid in recellularizing the lung and other geometrically complex organs for tissue engineering.
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Affiliation(s)
- Bethany M Young
- Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Leigh-Ann M Antczak
- Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Keerthana Shankar
- Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Rebecca L Heise
- Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, Virginia, USA.,Department of Physiology and Biophysics, Virginia Commonwealth University School of Medicine, Richmond, Virginia, USA
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Sangkaew A, Kojornna T, Tanahashi R, Takagi H, Yompakdee C. A novel yeast-based screening system for potential compounds that can alleviate human α-synuclein toxicity. J Appl Microbiol 2021; 132:1409-1421. [PMID: 34448525 PMCID: PMC9291589 DOI: 10.1111/jam.15256] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Revised: 07/10/2021] [Accepted: 07/27/2021] [Indexed: 11/29/2022]
Abstract
Aims This study aimed to establish a yeast‐based screening system for potential compounds that can alleviate the toxicity of α‐synuclein (α‐syn), a neuropathological hallmark of Parkinson’s disease, either inhibition of α‐syn aggregation or promotion of ubiquitin‐mediated degradation of α‐syn. Methods and Results A powerful yeast‐based screening assay using the rsp5A401E‐mutant strain, which is hypersensitive to α‐syn aggregation, was established by two‐step gene replacement and further overexpressed the GFP‐fused α‐syn in the drug‐sensitive yeast strain with a galactose‐inducible multicopy plasmid. The rsp5A401E‐mutant strain treated with baicalein, a known α‐syn aggregation inhibitor, showed better α‐syn toxicity alleviation than the same background wild type strain as accessed by comparison on the reduction kinetics of viable dye resazurin fluorometrically (λex540/λem590 nm). The rsp5A401E‐mutant yeast‐based assay system showed high sensitivity as it could detect as low as 3.13 µmol l−1 baicalein, the concentration that lower than previously report detected by the in vitro assay. Conclusions Our yeast‐based system has been effective for screening potential compounds that can alleviate α‐syn toxicity with high sensitivity and specificity. Significance and Impact of the Study Yeast‐based assay system can be used to discover novel neuroprotective drug candidates which may be either efficiently suppress‐α‐syn aggregation or enhance ubiquitin‐dependent degradation.
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Affiliation(s)
- Anyaporn Sangkaew
- Department of Microbiology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Thanaporn Kojornna
- Department of Microbiology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Ryoya Tanahashi
- Division of Biological Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Nara, Japan
| | - Hiroshi Takagi
- Division of Biological Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Nara, Japan
| | - Chulee Yompakdee
- Department of Microbiology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
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Velderrain-Rodríguez GR, Quero J, Osada J, Martín-Belloso O, Rodríguez-Yoldi MJ. Phenolic-Rich Extracts from Avocado Fruit Residues as Functional Food Ingredients with Antioxidant and Antiproliferative Properties. Biomolecules 2021; 11:biom11070977. [PMID: 34356601 PMCID: PMC8301936 DOI: 10.3390/biom11070977] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 06/29/2021] [Accepted: 06/30/2021] [Indexed: 12/13/2022] Open
Abstract
In this study, the total phenolic compounds content and profile, the nutritional value, the antioxidant and antiproliferative activities of avocado peel, seed coat, and seed extracts were characterized. Additionally, an in-silico analysis was performed to identify the phenolic compounds with the highest intestinal absorption and Caco-2 permeability. The avocado peel extract possessed the highest content of phenolic compounds (309.95 ± 25.33 mMol GA/100 g of extract) and the lowest effective concentration (EC50) against DPPH and ABTS radicals (72.64 ± 10.70 and 181.68 ± 18.47, respectively). On the other hand, the peel and seed coat extracts had the lowest energy densities (226.06 ± 0.06 kcal/100 g and 219.62 ± 0.49 kcal/100 g, respectively). Regarding the antiproliferative activity, the avocado peel extract (180 ± 40 µg/mL) showed the lowest inhibitory concentration (IC50), followed by the seed (200 ± 21 µg/mL) and seed coat (340 ± 32 µg/mL) extracts. The IC50 of the extracts induced apoptosis in Caco-2 cells at the early and late stages. According to the in-silico analysis, these results could be related to the higher Caco-2 permeability to hydroxysalidroside, salidroside, sakuranetin, and luteolin. Therefore, this study provides new insights regarding the potential use of these extracts as functional ingredients with antioxidant and antiproliferative properties and as medicinal agents in diseases related to oxidative stress such as cancer.
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Affiliation(s)
- Gustavo R. Velderrain-Rodríguez
- Agrotecnio Center, Department of Food Technology, University of Lleida, Av. Alcalde Rovira Roure 191, 25198 Lleida, Spain; (G.R.V.-R.); (O.M.-B.)
| | - Javier Quero
- Department of Pharmacology and Physiology, Forensic and Legal Medicine, Veterinary Faculty, University of Zaragoza, 50013 Zaragoza, Spain; (J.Q.); (J.O.)
| | - Jesús Osada
- Department of Pharmacology and Physiology, Forensic and Legal Medicine, Veterinary Faculty, University of Zaragoza, 50013 Zaragoza, Spain; (J.Q.); (J.O.)
- Department of Biochemistry and Molecular Cell Biology, Veterinary Faculty, University of Zaragoza, 50009 Zaragoza, Spain
- CIBERobn, ISCIII, IIS Aragón, IA2, 28029 Madrid, Spain
| | - Olga Martín-Belloso
- Agrotecnio Center, Department of Food Technology, University of Lleida, Av. Alcalde Rovira Roure 191, 25198 Lleida, Spain; (G.R.V.-R.); (O.M.-B.)
| | - María Jesús Rodríguez-Yoldi
- Department of Pharmacology and Physiology, Forensic and Legal Medicine, Veterinary Faculty, University of Zaragoza, 50013 Zaragoza, Spain; (J.Q.); (J.O.)
- CIBERobn, ISCIII, IIS Aragón, IA2, 28029 Madrid, Spain
- Correspondence: ; Tel.: +34-976-761649
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A simple and low-cost resazurin assay for vitality assessment across species. J Biotechnol 2021; 333:63-66. [PMID: 33933484 DOI: 10.1016/j.jbiotec.2021.04.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 04/22/2021] [Accepted: 04/26/2021] [Indexed: 12/31/2022]
Abstract
Working with biological organisms requires knowledge about the state of their viability and vitality to ascertain efficient processes. The phenoxazine dye resazurin is routinely used for viability assessment of many different species. Here, a novel use for resazurin as an indicator for vitality assessment across several species is proposed. Different amounts of biomass as well as mixtures of live/dead biomass were investigated for their capabilities of metabolizing resazurin and monitored over time. Increasing (live) biomass was found to increase reaction rate in a linear fashion, giving information about the cells' vitality. In an application example, stored suspension cultures of Sporosarcina pasteurii were found to decrease in viability over time, while urease activity decreased as well. For the first time, the assessment of vitality by one technique was demonstrated for several species in parallel.
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Cuprizone-Induced Neurotoxicity in Human Neural Cell Lines Is Mediated by a Reversible Mitochondrial Dysfunction: Relevance for Demyelination Models. Brain Sci 2021; 11:brainsci11020272. [PMID: 33671675 PMCID: PMC7926891 DOI: 10.3390/brainsci11020272] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 02/12/2021] [Accepted: 02/17/2021] [Indexed: 01/06/2023] Open
Abstract
Suitable in vivo and in vitro models are instrumental for the development of new drugs aimed at improving symptoms or progression of multiple sclerosis (MS). The cuprizone (CPZ)-induced murine model has gained momentum in recent decades, aiming to address the demyelination component of the disease. This work aims at assessing the differential cytotoxicity of CPZ in cells of different types and from different species: human oligodendroglial (HOG), human neuroblastoma (SH-SY5Y), human glioblastoma (T-98), and mouse microglial (N-9) cell lines. Moreover, the effect of CPZ was investigated in primary rat brain cells. Cell viability was assayed by oxygen rate consumption and by the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide-based (MTT) method. Our results demonstrated that CPZ did not cause death in any of the assayed cell models but affected mitochondrial function and aerobic cell respiration, thus compromising cell metabolism in neural cells and neuron-glia co-cultures. In this sense, we found differential vulnerability between glial cells and neurons as is the case of the CPZ-induced mouse model of MS. In addition, our findings demonstrated that reduced viability was spontaneous reverted in a time-dependent manner by treatment discontinuation. This reversible cell-based model may help to further investigate the role of mitochondria in the disease, and study the molecular intricacies underlying the pathophysiology of the MS and other demyelinating diseases.
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Sedlář A, Trávníčková M, Matějka R, Pražák Š, Mészáros Z, Bojarová P, Bačáková L, Křen V, Slámová K. Growth Factors VEGF-A 165 and FGF-2 as Multifunctional Biomolecules Governing Cell Adhesion and Proliferation. Int J Mol Sci 2021; 22:1843. [PMID: 33673317 PMCID: PMC7917819 DOI: 10.3390/ijms22041843] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 02/09/2021] [Accepted: 02/10/2021] [Indexed: 12/11/2022] Open
Abstract
Vascular endothelial growth factor-A165 (VEGF-A165) and fibroblast growth factor-2 (FGF-2) are currently used for the functionalization of biomaterials designed for tissue engineering. We have developed a new simple method for heterologous expression and purification of VEGF-A165 and FGF-2 in the yeast expression system of Pichia pastoris. The biological activity of the growth factors was assessed in cultures of human and porcine adipose tissue-derived stem cells (ADSCs) and human umbilical vein endothelial cells (HUVECs). When added into the culture medium, VEGF-A165 stimulated proliferation only in HUVECs, while FGF-2 stimulated the proliferation of both cell types. A similar effect was achieved when the growth factors were pre-adsorbed to polystyrene wells. The effect of our recombinant growth factors was slightly lower than that of commercially available factors, which was attributed to the presence of some impurities. The stimulatory effect of the VEGF-A165 on cell adhesion was rather weak, especially in ADSCs. FGF-2 was a potent stimulator of the adhesion of ADSCs but had no to negative effect on the adhesion of HUVECs. In sum, FGF-2 and VEGF-A165 have diverse effects on the behavior of different cell types, which maybe utilized in tissue engineering.
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Affiliation(s)
- Antonín Sedlář
- Laboratory of Biomaterials and Tissue Engineering, Institute of Physiology of the Czech Academy of Sciences, Vídeňská 1083, CZ 14220 Praha 4, Czech Republic; (A.S.); (M.T.); or or (Š.P.)
- Department of Physiology, Faculty of Science, Charles University, Viničná 7, CZ 12844 Praha 2, Czech Republic
| | - Martina Trávníčková
- Laboratory of Biomaterials and Tissue Engineering, Institute of Physiology of the Czech Academy of Sciences, Vídeňská 1083, CZ 14220 Praha 4, Czech Republic; (A.S.); (M.T.); or or (Š.P.)
| | - Roman Matějka
- Laboratory of Biomaterials and Tissue Engineering, Institute of Physiology of the Czech Academy of Sciences, Vídeňská 1083, CZ 14220 Praha 4, Czech Republic; (A.S.); (M.T.); or or (Š.P.)
- Faculty of Biomedical Engineering, Czech Technical University in Prague, CZ 27201 Kladno, Czech Republic;
| | - Šimon Pražák
- Laboratory of Biomaterials and Tissue Engineering, Institute of Physiology of the Czech Academy of Sciences, Vídeňská 1083, CZ 14220 Praha 4, Czech Republic; (A.S.); (M.T.); or or (Š.P.)
- Faculty of Biomedical Engineering, Czech Technical University in Prague, CZ 27201 Kladno, Czech Republic;
| | - Zuzana Mészáros
- Laboratory of Biotransformation, Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, CZ 14220 Praha 4, Czech Republic; (Z.M.); (V.K.)
- Department of Biochemistry, University of Chemistry and Technology Prague, Technická 6, CZ 16628 Praha 6, Czech Republic
| | - Pavla Bojarová
- Faculty of Biomedical Engineering, Czech Technical University in Prague, CZ 27201 Kladno, Czech Republic;
- Laboratory of Biotransformation, Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, CZ 14220 Praha 4, Czech Republic; (Z.M.); (V.K.)
| | - Lucie Bačáková
- Laboratory of Biomaterials and Tissue Engineering, Institute of Physiology of the Czech Academy of Sciences, Vídeňská 1083, CZ 14220 Praha 4, Czech Republic; (A.S.); (M.T.); or or (Š.P.)
| | - Vladimír Křen
- Laboratory of Biotransformation, Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, CZ 14220 Praha 4, Czech Republic; (Z.M.); (V.K.)
| | - Kristýna Slámová
- Laboratory of Biotransformation, Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, CZ 14220 Praha 4, Czech Republic; (Z.M.); (V.K.)
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Martins YA, Fonseca MJV, Pavan TZ, Lopez RFV. Bifunctional Therapeutic Application of Low-Frequency Ultrasound Associated with Zinc Phthalocyanine-Loaded Micelles. Int J Nanomedicine 2020; 15:8075-8095. [PMID: 33116519 PMCID: PMC7586016 DOI: 10.2147/ijn.s264528] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 09/24/2020] [Indexed: 12/22/2022] Open
Abstract
Purpose Sonodynamic therapy (SDT) is a new therapeutic modality for the noninvasive cancer treatment based on the association of ultrasound and sonosensitizer drugs. Topical SDT requires the development of delivery systems to properly transport the sonosensitizer, such as zinc phthalocyanine (ZnPc), to the skin. In addition, the delivery system itself can participate in sonodynamic events and influence the therapeutic response. This study aimed to develop ZnPc-loaded micelle to evaluate its potential as a topical delivery system and as a cavitational agent for low-frequency ultrasound (LFU) application with the dual purpose of promoting ZnPc skin penetration and generating reactive oxygen species (ROS) for SDT. Methods ZnPc-loaded micelles were developed by the thin-film hydration method and optimized using the Quality by Design approach. Micelles’ influence on LFU-induced cavitation activity was measured by potassium iodide dosimeter and aluminum foil pits experiments. In vitro skin penetration of ZnPc was assessed after pretreatment of the skin with LFU and simultaneous LFU treatment using ZnPc-loaded micelles as coupling media followed by 6 h of passive permeation of ZnPc-loaded micelles. The singlet oxygen generation by LFU irradiation of the micelles was evaluated using two different hydrophilic probes. The lipid peroxidation of the skin was estimated using the malondialdehyde assay after skin treatment with simultaneous LFU using ZnPc-loaded micelles. The viability of the B16F10 melanoma cell line was evaluated using resazurin after treatment with different concentrations of ZnPc-loaded micelles irradiated or not with LFU. Results The micelles increased the solubility of ZnPc and augmented the LFU-induced cavitation activity in two times compared to water. After 6 h ZnPc-loaded micelles skin permeation, simultaneous LFU treatment increased the amount of ZnPc in the dermis by more than 40 times, when compared to non-LFU-mediated treatment, and by almost 5 times, when compared to LFU pretreatment protocol. The LFU irradiation of micelles induced the generation of singlet oxygen, and the lipoperoxidation of the skin treated with the simultaneous LFU was enhanced in three times in comparison to the non-LFU-treated skin. A significant reduction in cell viability following treatment with ZnPc-loaded micelles and LFU was observed compared to blank micelles and non-LFU-treated control groups. Conclusion LFU-irradiated mice can be a potential approach to skin cancer treatment by combining the functions of increasing drug penetration and ROS generation required for SDT.
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Affiliation(s)
- Yugo A Martins
- School of Pharmaceutical Sciences of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, São Paulo, 14040-903, Brazil
| | - Maria J V Fonseca
- School of Pharmaceutical Sciences of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, São Paulo, 14040-903, Brazil
| | - Theo Z Pavan
- School of Philosophy, Sciences and Letters of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, Sao Paulo, 14090-900, Brazil
| | - Renata F V Lopez
- School of Pharmaceutical Sciences of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, São Paulo, 14040-903, Brazil
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Jaisin Y, Ratanachamnong P, Wongsawatkul O, Watthammawut A, Malaniyom K, Natewong S. Antioxidant and anti-inflammatory effects of piperine on UV-B-irradiated human HaCaT keratinocyte cells. Life Sci 2020; 263:118607. [PMID: 33091445 DOI: 10.1016/j.lfs.2020.118607] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 10/02/2020] [Accepted: 10/12/2020] [Indexed: 12/13/2022]
Abstract
The increase in intracellular reactive oxygen and nitrogen species plays a key role in ultraviolet B (UV-B)-induced inflammatory responses in the human skin. Piperine exhibits many pharmacological benefits. In the present study, the photoprotective effects and the possible underlying mechanisms of the anti-inflammatory effects of piperine on UV-B-irradiated keratinocytes were investigated. Piperine exerted strong, direct scavenging effects on DPPH radicals and exhibited free radical scavenging capabilities as demonstrated by the DCFH-DA and Griess assays. Consistent with these results, 10, 20, and 40 μM piperine pretreatments attenuated UV-B irradiation-induced keratinocyte cytotoxicity as reported by the resazurin assay. The highest concentration of piperine inhibited UV-B irradiation-induced cell apoptosis, as revealed by Hoechst 33342 staining. Moreover, we demonstrated the anti-inflammatory effects of piperine using western blot analysis, real-time PCR, and ELISA. Pretreatment with piperine suppressed the activation of phosphorylated p38, JNK, and AP-1 as well as the levels of COX-2/PGE2 and iNOS synthesis, while UV-B-irradiated cells triggered the induction of these signaling molecules. These results indicated that the inhibition of these inflammatory signaling pathways might play a key role in the regulation of the anti-inflammatory effects of piperine. In addition, piperine showed stronger anti-inflammatory effects than celecoxib which served as a positive control at the same concentration. All these results suggested that the anti-inflammatory properties of piperine protected keratinocytes from UV-B-induced damage, which might be due to its antioxidant properties. Therefore, piperine may be an effective therapeutic candidate compound for the treatment of UV irradiation-induced skin inflammation.
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Affiliation(s)
- Yamaratee Jaisin
- Department of Pharmacology, Faculty of Medicine, Srinakharinwirot University, Bangkok, Thailand.
| | | | - Orapin Wongsawatkul
- Department of Pharmacology, Faculty of Medicine, Srinakharinwirot University, Bangkok, Thailand
| | - Atthaboon Watthammawut
- Department of Anatomy, Faculty of Medicine, Srinakharinwirot University, Bangkok, Thailand
| | - Kittiya Malaniyom
- Department of Pharmacology, Faculty of Medicine, Srinakharinwirot University, Bangkok, Thailand
| | - Sutthibhon Natewong
- Department of Pharmacology, Faculty of Medicine, Srinakharinwirot University, Bangkok, Thailand
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Kim DH, Ahn J, Kang HK, Kim MS, Kim NG, Kook MG, Choi SW, Jeon NL, Woo HM, Kang KS. Development of highly functional bioengineered human liver with perfusable vasculature. Biomaterials 2020; 265:120417. [PMID: 32987272 DOI: 10.1016/j.biomaterials.2020.120417] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 08/28/2020] [Accepted: 09/19/2020] [Indexed: 12/11/2022]
Abstract
Liver tissue engineering offers a promising strategy for liver failure patients. Since transplantation rejection resulting in vessel thrombosis is regarded as a major hurdle, vascular reconstruction is one of indispensable requirements of whole organ engineering. Here we demonstrated a novel strategy for reconstruction of a vascularized bioengineered human liver (VBHL) using decellularized liver scaffolds in an efficient manner. First we achieved fully functional endothelial coverage of scaffolds by adopting the anti-CD31 aptamer as a potent coating agent for re-endothelialization. Through an ex vivo human blood perfusion that recapitulates the blood coagulation response in humans, we demonstrated significantly reduced platelet aggregation in anti-CD31 aptamer coated scaffolds. We then produced VBHL constructs using liver parenchymal cells and nonparenchymal cells, properly organized into liver-like structures with an aligned vasculature. Interestingly, VBHL constructs displayed prominently enhanced long-term liver-specific functions that are affected by vascular functionality. The VBHL constructs formed perfusable vessel networks in vivo as evidenced by the direct vascular connection between the VBHL constructs and the renal circulation. Furthermore, heterotopic transplantation of VBHL constructs supported liver functions in a rat model of liver fibrosis. Overall, we proposed a new strategy to generate transplantable bioengineered livers characterized by highly functional vascular reconstruction.
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Affiliation(s)
- Da-Hyun Kim
- Adult Stem Cell Research Center and Research Institute for Veterinary Medicine, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | - Jungho Ahn
- School of Mechanical Aerospace Engineering, Seoul National University, Seoul, Republic of Korea
| | - Hyun Kyoung Kang
- Adult Stem Cell Research Center and Research Institute for Veterinary Medicine, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | - Min-Soo Kim
- Adult Stem Cell Research Center and Research Institute for Veterinary Medicine, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | - Nam-Gyo Kim
- Adult Stem Cell Research Center and Research Institute for Veterinary Medicine, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | - Myung Geun Kook
- Adult Stem Cell Research Center and Research Institute for Veterinary Medicine, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | - Soon Won Choi
- Adult Stem Cell Research Center and Research Institute for Veterinary Medicine, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | - Noo Li Jeon
- School of Mechanical Aerospace Engineering, Seoul National University, Seoul, Republic of Korea
| | - Heung-Myong Woo
- College of Veterinary Medicine & Institute of Veterinary Science, Kangwon National University, Chuncheon, Gangwon, Republic of Korea
| | - Kyung-Sun Kang
- Adult Stem Cell Research Center and Research Institute for Veterinary Medicine, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea.
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41
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Parsley NC, Smythers AL, Hicks LM. Implementation of Microfluidics for Antimicrobial Susceptibility Assays: Issues and Optimization Requirements. Front Cell Infect Microbiol 2020; 10:547177. [PMID: 33042872 PMCID: PMC7527609 DOI: 10.3389/fcimb.2020.547177] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Accepted: 08/13/2020] [Indexed: 12/26/2022] Open
Abstract
Despite the continuous emergence of multi-drug resistant pathogens, the number of new antimicrobials reaching the market is critically low. Natural product peptides are a rich source of bioactive compounds, and advances in mass spectrometry have achieved unprecedented capabilities for the discovery and characterization of novel molecular species. However, traditional bioactivity assay formats hinder the discovery and biochemical characterization of natural product antimicrobial peptides (AMPs), necessitating large sample quantities and significant optimization of experimental parameters to achieve accurate/consistent activity measurements. Microfluidic devices offer a promising alternative to bulk assay systems. Herein, a microfluidics-based bioassay was compared to the traditional 96-well plate format in respective commercially-available hardware. Bioactivity in each assay type was compared using a Viola inconspicua peptide library screened against E. coli ATCC 25922. Brightfield microcopy was used to determine bioactivity in microfluidic channels while both common optical and fluorescence-based measurements of cell viability were critically assessed in plate-based assays. Exhibiting some variation in optical density and fluorescence-based measurements, all plate-based assays conferred bioactivity in late eluting V. inconspicua library fractions. However, significant differences in the bioactivity profiles of plate-based and microfluidic assays were found, and may be derived from the materials comprising each assay device or the growth/assay conditions utilized in each format. While new technologies are necessary to overcome the limitations of traditional bioactivity assays, we demonstrate that off-the-shelf implementation of microfluidic devices is non-trivial and significant method development/optimization is required before conventional use can be realized for sensitive and rapid detection of AMPs in natural product matrices.
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Affiliation(s)
- Nicole C Parsley
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Amanda L Smythers
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Leslie M Hicks
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
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Feng Z, Sedeeq M, Daniel A, Corban M, Woolley KL, Condie R, Azimi I, Smith JA, Gueven N. Comparative In Vitro Toxicology of Novel Cytoprotective Short-Chain Naphthoquinones. Pharmaceuticals (Basel) 2020; 13:ph13080184. [PMID: 32784558 PMCID: PMC7463972 DOI: 10.3390/ph13080184] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 08/05/2020] [Indexed: 12/15/2022] Open
Abstract
Short-chain quinones (SCQs) have been identified as potential drug candidates against mitochondrial dysfunction, which largely depends on the reversible redox characteristics of the active quinone core. We recently identified 11 naphthoquinone derivatives, 1–11, from a library of SCQs that demonstrated enhanced cytoprotection and improved metabolic stability compared to the clinically used benzoquinone idebenone. Since the toxicity properties of our promising SCQs were unknown, this study developed multiplex methods and generated detailed toxicity profiles from 11 endpoint measurements using the human hepatocarcinoma cell line HepG2. Overall, the toxicity profiles were largely comparable across different assays, with simple standard assays showing increased sensitivity compared to commercial toxicity assays. Within the 11 naphthoquinones tested, the L-phenylalanine derivative 4 consistently demonstrated the lowest toxicity across all assays. The results of this study not only provide useful information about the toxicity features of SCQs but will also enable the progression of the most promising drug candidates towards their clinical use.
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Affiliation(s)
- Zikai Feng
- School of Pharmacy and Pharmacology, University of Tasmania, Hobart, TAS 7005, Australia; (M.S.); (A.D.); (M.C.); (I.A.)
- School of Natural Sciences, University of Tasmania, Hobart, TAS 7005, Australia; (K.L.W.); (R.C.); (J.A.S.)
- Correspondence: (Z.F.); (N.G.)
| | - Mohammed Sedeeq
- School of Pharmacy and Pharmacology, University of Tasmania, Hobart, TAS 7005, Australia; (M.S.); (A.D.); (M.C.); (I.A.)
| | - Abraham Daniel
- School of Pharmacy and Pharmacology, University of Tasmania, Hobart, TAS 7005, Australia; (M.S.); (A.D.); (M.C.); (I.A.)
| | - Monika Corban
- School of Pharmacy and Pharmacology, University of Tasmania, Hobart, TAS 7005, Australia; (M.S.); (A.D.); (M.C.); (I.A.)
| | - Krystel L. Woolley
- School of Natural Sciences, University of Tasmania, Hobart, TAS 7005, Australia; (K.L.W.); (R.C.); (J.A.S.)
| | - Ryan Condie
- School of Natural Sciences, University of Tasmania, Hobart, TAS 7005, Australia; (K.L.W.); (R.C.); (J.A.S.)
| | - Iman Azimi
- School of Pharmacy and Pharmacology, University of Tasmania, Hobart, TAS 7005, Australia; (M.S.); (A.D.); (M.C.); (I.A.)
| | - Jason A. Smith
- School of Natural Sciences, University of Tasmania, Hobart, TAS 7005, Australia; (K.L.W.); (R.C.); (J.A.S.)
| | - Nuri Gueven
- School of Pharmacy and Pharmacology, University of Tasmania, Hobart, TAS 7005, Australia; (M.S.); (A.D.); (M.C.); (I.A.)
- Correspondence: (Z.F.); (N.G.)
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Samhadaneh DM, Mandl GA, Han Z, Mahjoob M, Weber SC, Tuznik M, Rudko DA, Capobianco JA, Stochaj U. Evaluation of Lanthanide-Doped Upconverting Nanoparticles for in Vitro and in Vivo Applications. ACS APPLIED BIO MATERIALS 2020; 3:4358-4369. [DOI: 10.1021/acsabm.0c00381] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Dana M. Samhadaneh
- Department of Physiology, McGill University, Montreal, Quebec H3G 1Y6, Canada
| | - Gabrielle A. Mandl
- Department of Chemistry & Biochemistry and Centre for NanoScience Research, Concordia University, Montreal, Quebec H4B 1R6, Canada
| | - Zhao Han
- Department of Physiology, McGill University, Montreal, Quebec H3G 1Y6, Canada
| | - Maryam Mahjoob
- Department of Physiology, McGill University, Montreal, Quebec H3G 1Y6, Canada
| | - Stephanie C. Weber
- Department of Biology, McGill University, Montreal, Quebec H3A 1B1, Canada
| | - Marius Tuznik
- McConnell Brain Imaging Centre, Montreal Neurological Institute and Hospital, McGill University, Montreal, Quebec H3A 2B4, Canada
- Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec H3A 0G4, Canada
| | - David A. Rudko
- McConnell Brain Imaging Centre, Montreal Neurological Institute and Hospital, McGill University, Montreal, Quebec H3A 2B4, Canada
- Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec H3A 0G4, Canada
- Department of Biomedical Engineering, McGill University, Montreal, Quebec H3A 0G4, Canada
| | - John A. Capobianco
- Department of Chemistry & Biochemistry and Centre for NanoScience Research, Concordia University, Montreal, Quebec H4B 1R6, Canada
| | - Ursula Stochaj
- Department of Physiology, McGill University, Montreal, Quebec H3G 1Y6, Canada
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44
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Resazurin-Based Assay for Quantifying Living Cells during Alkaline Phosphatase (ALP) Release. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10113840] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Alkaline phosphatase (ALP) is an important reporter gene in the gene expression system, therefore monitoring cellular behavior including cell viability during ALP release is of significance. This assay produced a quantitative resazurin-based assay for cell viability in embryonic and cancer cells during alkaline phosphatase (ALP) release. A post-confluence culture method was applied to induce ALP in the cells of Balb/c 3T3, A549, MCF-7, and Ht-29. The density of each cell type was optimized using the standard cell culture assay. The main parameters affecting the results of resazurin involve the concentration of resazurin, incubation time, and cell number. The redox reaction, in which resazurin is reduced by the cells, was measured by fluorescence at 544 nm and 590 nm. The obtained data were compared with the hemocytometer assay. ALP release was determined using the optical active substrate p-nitrophenyl phosphate and colorimetric assay.
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45
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Xu JL, Lesniak A, Gowen AA. Predictive Modeling of the In Vitro Responses of Preosteoblastic MC3T3-E1 Cells on Polymeric Surfaces Using Fourier Transform Infrared Spectroscopy. ACS APPLIED MATERIALS & INTERFACES 2020; 12:24466-24478. [PMID: 32374584 DOI: 10.1021/acsami.0c04261] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Biomaterials' surface properties elicit diverse cellular responses in biomedical and biotechnological applications. Predicting the cell behavior on a polymeric surface is an ongoing challenge due to its complexity. This work proposes a novel modeling methodology based on attenuated total reflection-Fourier transform infrared (ATR-FTIR) spectroscopy. Spectra were collected on wetted polymeric surfaces to incorporate both surface chemistry and information on water-polymer interactions. Results showed that predictive models built with spectra from wetted surfaces ("wet spectra") performed much better than models built using spectra acquired from dry surfaces ("dry spectra"), suggesting that the water-polymer interaction is critically important to the prediction of subsequent cell behavior. The best model was seen to predict total area of focal adhesions with coefficient of determination for prediction (R2P) of 0.94 and root-mean-square errors of prediction (RMSEP) of 4.03 μm2 when tested on an independent experimental set. This work offers new insights into our understanding of cell-biomaterial interactions. The presence of carboxyl groups in polymers promoted larger adhesion areas, yet the formation of carbonyl-to-water interaction decreased adhesion areas. Surface wettability, which was related to the water-polymer interaction, was proven to highly influence cell adhesion. The good predictive ability opens new possibilities for high throughput monitoring of cell attachment on polymeric substrates.
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Affiliation(s)
- Jun-Li Xu
- School of Biosystems and Food Engineering, University College Dublin, Belfield, Dublin 4, Ireland
| | - Anna Lesniak
- School of Biosystems and Food Engineering, University College Dublin, Belfield, Dublin 4, Ireland
| | - Aoife A Gowen
- School of Biosystems and Food Engineering, University College Dublin, Belfield, Dublin 4, Ireland
- UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland
- UCD Institute of Food and Health, University College Dublin, Belfield, Dublin 4, Ireland
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46
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Gong X, Liang Z, Yang Y, Liu H, Ji J, Fan Y. A resazurin-based, nondestructive assay for monitoring cell proliferation during a scaffold-based 3D culture process. Regen Biomater 2020; 7:271-281. [PMID: 32523729 PMCID: PMC7266666 DOI: 10.1093/rb/rbaa002] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 12/30/2019] [Accepted: 02/02/2020] [Indexed: 12/25/2022] Open
Abstract
Development of viable cell estimation method without sacrificing proliferation and functions of cells cultured on regenerative biomaterials is essential for regenerative engineering. Cytotoxicity and depletion of resazurin are critical but often overlooked limitations that hindered applications of resazurin in viable cell estimation. The present work found that cytotoxicity and depletion of resazurin depended on cell concentration, resazurin concentration and resazurin incubation time. A simple strategy which only allowed cells to incubate with resazurin during each measurement was developed to eliminate negative effects of resazurin. This strategy was verified by monitoring proliferation of MC3T3-E1 preosteoblasts on poly(d,l-lactic acid) scaffold during a continuous 3D culture process for up to 21 days, comparing the accuracy with MTT assay which is a destructive assay with high sensitivity and accuracy and commonly used in regenerative engineering and comparing viability, proliferation and differentiation functions of MC3T3-E1, which were treated with/without this strategy for nondestructive evaluation. This method showed comparable linearity of standard curve and characteristics of growth curve to MTT assay. No major negative effects of this method on MC3T3-E1 viability and functions were found. Our work highlighted the importance of the concentration and incubation time of resazurin in designing application-specific nondestructive viability assay and would be helpful in improving the implanted medical devices as well as in regenerative engineering.
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Affiliation(s)
- Xianghui Gong
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, People's Republic of China.,Beijing Advanced Innovation Centre for Biomedical Engineering, Beihang University, Beijing 102402, People's Republic of China
| | - Zhuqing Liang
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, People's Republic of China.,Beijing Advanced Innovation Centre for Biomedical Engineering, Beihang University, Beijing 102402, People's Republic of China
| | - Yongxing Yang
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, People's Republic of China
| | - Haifeng Liu
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, People's Republic of China
| | - Jing Ji
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, People's Republic of China
| | - Yubo Fan
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, People's Republic of China.,Beijing Advanced Innovation Centre for Biomedical Engineering, Beihang University, Beijing 102402, People's Republic of China.,National Research Center for Rehabilitation Technical Aids, Beijing 100176, People's Republic of China
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47
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Ruoß M, Kieber V, Rebholz S, Linnemann C, Rinderknecht H, Häussling V, Häcker M, Olde Damink LHH, Ehnert S, Nussler AK. Cell-Type-Specific Quantification of a Scaffold-Based 3D Liver Co-Culture. Methods Protoc 2019; 3:E1. [PMID: 31878071 PMCID: PMC7189675 DOI: 10.3390/mps3010001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 12/18/2019] [Accepted: 12/18/2019] [Indexed: 12/25/2022] Open
Abstract
In order to increase the metabolic activity of human hepatocytes and liver cancer cell lines, many approaches have been reported in recent years. The metabolic activity could be increased mainly by cultivating the cells in 3D systems or co-cultures (with other cell lines). However, if the system becomes more complex, it gets more difficult to quantify the number of cells (e.g., on a 3D matrix). Until now, it has been impossible to quantify different cell types individually in 3D co-culture systems. Therefore, we developed a PCR-based method that allows the quantification of HepG2 cells and 3T3-J2 cells separately in a 3D scaffold culture. Moreover, our results show that this method allows better comparability between 2D and 3D cultures in comparison to the often-used approaches based on metabolic activity measurements, such as the conversion of resazurin.
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Affiliation(s)
- Marc Ruoß
- Department of Traumatology, Siegfried Weller Institute, BG-Klinik Tübingen, Eberhard Karls University, 72076 Tübingen, Germany; (V.K.); (S.R.); (C.L.); (H.R.); (V.H.); (M.H.); (S.E.); (A.K.N.)
| | - Vanessa Kieber
- Department of Traumatology, Siegfried Weller Institute, BG-Klinik Tübingen, Eberhard Karls University, 72076 Tübingen, Germany; (V.K.); (S.R.); (C.L.); (H.R.); (V.H.); (M.H.); (S.E.); (A.K.N.)
| | - Silas Rebholz
- Department of Traumatology, Siegfried Weller Institute, BG-Klinik Tübingen, Eberhard Karls University, 72076 Tübingen, Germany; (V.K.); (S.R.); (C.L.); (H.R.); (V.H.); (M.H.); (S.E.); (A.K.N.)
| | - Caren Linnemann
- Department of Traumatology, Siegfried Weller Institute, BG-Klinik Tübingen, Eberhard Karls University, 72076 Tübingen, Germany; (V.K.); (S.R.); (C.L.); (H.R.); (V.H.); (M.H.); (S.E.); (A.K.N.)
| | - Helen Rinderknecht
- Department of Traumatology, Siegfried Weller Institute, BG-Klinik Tübingen, Eberhard Karls University, 72076 Tübingen, Germany; (V.K.); (S.R.); (C.L.); (H.R.); (V.H.); (M.H.); (S.E.); (A.K.N.)
| | - Victor Häussling
- Department of Traumatology, Siegfried Weller Institute, BG-Klinik Tübingen, Eberhard Karls University, 72076 Tübingen, Germany; (V.K.); (S.R.); (C.L.); (H.R.); (V.H.); (M.H.); (S.E.); (A.K.N.)
| | - Marina Häcker
- Department of Traumatology, Siegfried Weller Institute, BG-Klinik Tübingen, Eberhard Karls University, 72076 Tübingen, Germany; (V.K.); (S.R.); (C.L.); (H.R.); (V.H.); (M.H.); (S.E.); (A.K.N.)
| | | | - Sabrina Ehnert
- Department of Traumatology, Siegfried Weller Institute, BG-Klinik Tübingen, Eberhard Karls University, 72076 Tübingen, Germany; (V.K.); (S.R.); (C.L.); (H.R.); (V.H.); (M.H.); (S.E.); (A.K.N.)
| | - Andreas K. Nussler
- Department of Traumatology, Siegfried Weller Institute, BG-Klinik Tübingen, Eberhard Karls University, 72076 Tübingen, Germany; (V.K.); (S.R.); (C.L.); (H.R.); (V.H.); (M.H.); (S.E.); (A.K.N.)
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48
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Wagner AO, Markt R, Mutschlechner M, Lackner N, Prem EM, Praeg N, Illmer P. Medium Preparation for the Cultivation of Microorganisms under Strictly Anaerobic/Anoxic Conditions. J Vis Exp 2019:10.3791/60155. [PMID: 31475968 PMCID: PMC6796894 DOI: 10.3791/60155] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In contrast to aerobic organisms, strictly anaerobic microorganisms require the absence of oxygen and usually a low redox potential to initiate growth. As oxygen is ubiquitous in air, retaining O2-free conditions during all steps of cultivation is challenging but a prerequisite for anaerobic culturing. The protocol presented here demonstrates the successful cultivation of an anaerobic mixed culture derived from a biogas plant using a simple and inexpensive method. A precise description of the entire anoxic culturing process is given including media preparation, filling of cultivation flasks, supplementation with redox indicator and reducing agents to provide low redox potentials as well as exchanging the headspace to keep media free from oxygen. Furthermore, a detailed overview of aseptically inoculating gas tight serum flasks (by using sterile syringes and needles) and suitable incubation conditions is provided. The present protocol further deals with gas and liquid sampling for subsequent analyses regarding gas composition and volatile fatty acid concentrations using gas chromatography (GC) and high performance liquid chromatography (HPLC), respectively, and the calculation of biogas and methane yield considering the ideal gas law.
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Affiliation(s)
| | - Rudolf Markt
- Department of Microbiology, Universität Innsbruck
| | | | - Nina Lackner
- Department of Microbiology, Universität Innsbruck
| | - Eva M Prem
- Department of Microbiology, Universität Innsbruck
| | - Nadine Praeg
- Department of Microbiology, Universität Innsbruck
| | - Paul Illmer
- Department of Microbiology, Universität Innsbruck
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49
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Li W, Fu Y, Jiang B, Lo AY, Ameer GA, Barnett C, Wang B. Polymer-integrated amnion scaffold significantly improves cleft palate repair. Acta Biomater 2019; 92:104-114. [PMID: 31102764 DOI: 10.1016/j.actbio.2019.05.035] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 04/08/2019] [Accepted: 05/13/2019] [Indexed: 11/17/2022]
Abstract
Cleft palate is a common oral and craniomaxillofacial birth defect. As the ideal surgery time is shortly after birth, clinical treatments should result in minimal disruption of theskeleton to allow tissue growth in children. A tissue-engineered graft was created in this study for cleft palate repair by integrating poly(1,8-octamethylene-citrate) (POC) with a decellularized amnion membrane (DAM-POC) to incorporate the advantages of both the synthetic polymer and the native tissue. The success of POC incorporation was confirmed by laser-induced breakdown spectroscopy and fluorescence detection. The DAM-POC scaffold showed a certain level of structure collapse and lower stiffness but better resistance to enzyme digestion than the native amnion and DAM scaffold. The DAM-POC scaffold is cell compatible when seeded with mesenchymal stem cells, as evidenced by adequate cell viability and improved alkaline phosphatase (ALP) activity and calcium deposit. A large palate defect was first surgically created in a young rat model and then repaired with the DAM-POC scaffold. Eight weeks postsurgery, histological study and CT scans showed nearly complete healing of both soft and hard tissues. In conclusion, we developed a cell-free, resorbable graft by incorporating and integrating a synthetic polymer with a human DAM. When the DAM-POC scaffold was applied to repair a large palate defect in young rats, it showed adequate biocompatibility as evidenced by its effectiveness in guiding hard and soft tissue regeneration and minimum interference with natural growth and palate development of rats. STATEMENT OF SIGNIFICANCE: Proper restoration of severe cleft palate remains a major challenge because of insufficient autologous soft tissues to close the open wounds, thereby causing high tension at the surgical junction, secondary palatal fistulas, wound contraction, scar tissue formation, and facial growth disturbances. In this study, we have developed a tissue-engineered graft through incorporating and integrating a synthetic polymer with the human amnion membrane for cleft palate repair. The significance of this study lies in our ability to develop a cell-free, resorbable graft that can provide a less surgically invasive option to cover the open defect and support palate regeneration and tissue growth. This technique could potentially advance soft and hard tissue regeneration in children with birth craniomaxillofacial defects.
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Affiliation(s)
- Wuwei Li
- Department of Oral and Maxillofacial Surgery, School of Stomatology, Dalian Medical University, Liaoning 116001, China
| | - Yuqian Fu
- Department of Oral and Maxillofacial Surgery, School of Stomatology, Dalian Medical University, Liaoning 116001, China
| | - Bin Jiang
- Biomedical Engineering Department, Northwestern University, Evanston, IL 60201, United States; Center for Advanced Regenerative Engineering, Northwestern University, Evanston, IL 60201, United States
| | - Aaron Y Lo
- Biomedical Engineering Department, Northwestern University, Evanston, IL 60201, United States; Center for Advanced Regenerative Engineering, Northwestern University, Evanston, IL 60201, United States
| | - Guillermo A Ameer
- Biomedical Engineering Department, Northwestern University, Evanston, IL 60201, United States; Center for Advanced Regenerative Engineering, Northwestern University, Evanston, IL 60201, United States
| | - Cleon Barnett
- Department of Physical Sciences, Alabama State University, Montgomery, AL 36104, United States
| | - Bo Wang
- Joint Department of Biomedical Engineering, Marquette University and the Medical College of Wisconsin, Milwaukee, WI 53226, United States.
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50
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Brown JH, Das P, DiVito MD, Ivancic D, Tan LP, Wertheim JA. Nanofibrous PLGA electrospun scaffolds modified with type I collagen influence hepatocyte function and support viability in vitro. Acta Biomater 2018; 73:217-227. [PMID: 29454157 PMCID: PMC5985221 DOI: 10.1016/j.actbio.2018.02.009] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 01/23/2018] [Accepted: 02/08/2018] [Indexed: 02/06/2023]
Abstract
A major challenge of maintaining primary hepatocytes in vitro is progressive loss of hepatocyte-specific functions, such as protein synthesis and cytochrome P450 (CYP450) catalytic activity. We developed a three-dimensional (3D) nanofibrous scaffold made from poly(l-lactide-co-glycolide) (PLGA) polymer using a newly optimized wet electrospinning technique that resulted in a highly porous structure that accommodated inclusion of primary human hepatocytes. Extracellular matrix (ECM) proteins (type I collagen or fibronectin) at varying concentrations were chemically linked to electrospun PLGA using amine coupling to develop an in vitro culture system containing the minimal essential ECM components of the liver micro-environment that preserve hepatocyte function in vitro. Cell-laden nanofiber scaffolds were tested in vitro to maintain hepatocyte function over a two-week period. Incorporation of type I collagen onto PLGA scaffolds (PLGA-Chigh: 100 µg/mL) led to 10-fold greater albumin secretion, 4-fold higher urea synthesis, and elevated transcription of hepatocyte-specific CYP450 genes (CYP3A4, 3.5-fold increase and CYP2C9, 3-fold increase) in primary human hepatocytes compared to the same cells grown within unmodified PLGA scaffolds over two weeks. These indices, measured using collagen-bonded scaffolds, were also higher than scaffolds coupled to fibronectin or an ECM control sandwich culture composed of type I collagen and Matrigel. Induction of CYP2C9 activity was also higher in these same type I collagen PLGA scaffolds compared to other ECM-modified or unmodified PLGA constructs and was equivalent to the ECM control at 7 days. Together, we demonstrate a minimalist ECM-based 3D synthetic scaffold that accommodates primary human hepatocyte inclusion into the matrix, maintains long-term in vitro survival and stimulates function, which can be attributed to coupling of type I collagen. STATEMENT OF SIGNIFICANCE Culturing primary hepatocytes within a three-dimensional (3D) structure that mimics the natural liver environment is a promising strategy for extending the function and viability of hepatocytes in vitro. In the present study we generate porous PLGA nanofibers, that are chemically modified with extracellular matrix proteins, to serve as 3D scaffolds for the in vitro culture of primary human hepatocytes. Our findings demonstrate that the use of ECM proteins, especially type I collagen, in a porous 3D environment helps to improve the synthetic function of primary hepatocytes over time. We believe the work presented within will provide insights to readers for drug toxicity and tissue engineering applications.
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Affiliation(s)
- Jessica H Brown
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, United States; Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, United States
| | - Prativa Das
- Interdisciplinary Graduate School, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Michael D DiVito
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, United States; Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, United States
| | - David Ivancic
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, United States; Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, United States
| | - Lay Poh Tan
- Interdisciplinary Graduate School, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore; School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798 Singapore..
| | - Jason A Wertheim
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, United States; Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, United States; Chemistry of Life Processes Institute, Northwestern University, Evanston, IL 60208, United States; Department of Surgery, Jesse Brown VA Medical Center, Chicago, IL 60612, United States; Simpson Querrey Institute for BioNanotechnology in Medicine, Northwestern University, Chicago, IL 60611, United States; Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, United States.
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