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Chen XC, Wang A, Wang JJ, Zhang ZD, Yu JY, Yan YJ, Zhang JY, Niu J, Cui XY, Liu XH. Influences of coexisting aged polystyrene microplastics on the ecological and health risks of cadmium in soils: A leachability and oral bioaccessibility based study. J Hazard Mater 2024; 469:133884. [PMID: 38412647 DOI: 10.1016/j.jhazmat.2024.133884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 01/22/2024] [Accepted: 02/22/2024] [Indexed: 02/29/2024]
Abstract
Whether coexisting microplastics (MPs) affect the ecological and health risks of cadmium (Cd) in soils is a cutting-edge scientific issue. In this study, four typical Chinese soils were prepared as artificially Cd-contaminated soils with/without aged polystyrene (PS). TCLP and in vitro PBET model were used to determine the leachability (ecological risk) and oral bioaccessibility (human health risk) of soil Cd. The mechanisms by which MPs influence soil Cd were discussed from direct and indirect perspectives. Results showed that there was no significant difference in the leachability of soil Cd with/without aged PS. Additionally, aged PS led to a significant decrease in the bioaccessibility of soil Cd in gastric phase, but not in small intestinal phase. The increase in surface roughness and the new characteristic peaks (e.g., Si-O-Si) of aged PS directly accounted for the change in Cd bioaccessibility. The change in organic matter content indirectly accounted for the exceptional increase in Cd bioaccessibility of black soil with aged PS in small intestinal phase. Furthermore, the changes in cation exchange capacity and Cd mobility factor caused by aged PS explained the change in Cd leachability. These results contribute to a deeper understanding about environmental and public health in complicated emerging scenarios.
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Affiliation(s)
- Xiao-Chen Chen
- Innovation Center for Soil Remediation and Restoration Technologies, College of Environment and Safety Engineering, Fuzhou University, 2 Wulongjiangbei Road, Fuzhou 350108, PR China
| | - Ao Wang
- Innovation Center for Soil Remediation and Restoration Technologies, College of Environment and Safety Engineering, Fuzhou University, 2 Wulongjiangbei Road, Fuzhou 350108, PR China
| | - Jun-Jie Wang
- Innovation Center for Soil Remediation and Restoration Technologies, College of Environment and Safety Engineering, Fuzhou University, 2 Wulongjiangbei Road, Fuzhou 350108, PR China; Fuzhou City Construction Design and Research Institute Co., Ltd., 340 Liuyibei Road, Fuzhou 350001, PR China
| | - Zeng-Di Zhang
- Innovation Center for Soil Remediation and Restoration Technologies, College of Environment and Safety Engineering, Fuzhou University, 2 Wulongjiangbei Road, Fuzhou 350108, PR China
| | - Jian-Ying Yu
- Innovation Center for Soil Remediation and Restoration Technologies, College of Environment and Safety Engineering, Fuzhou University, 2 Wulongjiangbei Road, Fuzhou 350108, PR China; The Second Geological Exploration Institute, China Metallurgical Geology Bureau, 1 Kejidong Road, Fuzhou 350108, PR China
| | - Ying-Jie Yan
- Innovation Center for Soil Remediation and Restoration Technologies, College of Environment and Safety Engineering, Fuzhou University, 2 Wulongjiangbei Road, Fuzhou 350108, PR China; Fuzhou University Zhicheng College, 50 Yangqiaoxi Road, Fuzhou 350002, PR China
| | - Jian-Yu Zhang
- Jiangsu Longchang Chemical Co., Ltd., 1 Qianjiang Road, Rugao 226532, PR China
| | - Jia Niu
- Center of Safe and Energy-Saving Engineering Technology for Urban Water Supply and Drainage System, School of Ecological Environment and Urban Construction, Fujian University of Technology, 33 Xuefunan Road, Fuzhou 350118, PR China
| | - Xiao-Yu Cui
- School of Environmental Science and Engineering, Tianjin University, 135 Yaguan Road, Tianjin 300354, PR China
| | - Xian-Hua Liu
- School of Environmental Science and Engineering, Tianjin University, 135 Yaguan Road, Tianjin 300354, PR China.
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Güner E, Özkan Ö, Yalcin-Ozkat G, Ölgen S. Determination of Novel SARS-CoV-2 Inhibitors by Combination of Machine Learning and Molecular Modeling Methods. Med Chem 2024; 20:153-231. [PMID: 37957860 DOI: 10.2174/0115734064265609231026063624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 08/30/2023] [Accepted: 09/25/2023] [Indexed: 11/15/2023]
Abstract
INTRODUCTION Within the scope of the project, this study aimed to find novel inhibitors by combining computational methods. In order to design inhibitors, it was aimed to produce molecules similar to the RdRp inhibitor drug Favipiravir by using the deep learning method. METHODS For this purpose, a Trained Neural Network (TNN) was used to produce 75 molecules similar to Favipiravir by using Simplified Molecular Input Line Entry System (SMILES) representations. The binding properties of molecules to Viral RNA-dependent RNA polymerase (RdRp) were studied by using molecular docking studies. To confirm the accuracy of this method, compounds were also tested against 3CL protease (3CLpro), which is another important enzyme for the progression of SARS-CoV-2. Compounds having better binding energies and RMSD values than favipiravir were searched with similarity analysis on the ChEMBL drug database in order to find similar structures with RdRp and 3CLpro inhibitory activities. RESULTS A similarity search found new 200 potential RdRp and 3CLpro inhibitors structurally similar to produced molecules, and these compounds were again evaluated for their receptor interactions with molecular docking studies. Compounds showed better interaction with RdRp protease than 3CLpro. This result presented that artificial intelligence correctly produced structures similar to favipiravir that act more specifically as RdRp inhibitors. In addition, Lipinski's rules were applied to the molecules that showed the best interaction with RdRp, and 7 compounds were determined to be potential drug candidates. Among these compounds, a Molecular Dynamic simulation study was applied for ChEMBL ID:1193133 to better understand the existence and duration of the compound in the receptor site. CONCLUSION The results confirmed that the ChEMBL ID:1193133 compound showed good Root Mean Square Deviation (RMSD), Root Mean Square Fluctuation (RMSF), hydrogen bonding, and remaining time in the active site; therefore, it was considered that it could be active against the virus. This compound was also tested for antiviral activity, and it was determined that it did not delay viral infection, although it was cytotoxic between 5mg/mL-1.25mg/mL concentrations. However, if other compounds could be tested, it might provide a chance to obtain activity, and compounds should also be tested against the enzymes as well as the other types of viruses.
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Affiliation(s)
- Ersin Güner
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Biruni University, 34010 Topkapı, İstanbul, Turkey
| | - Özgür Özkan
- Teknokent Arı, Pinticks Software Company, Istanbul Technical University, Reşitpaşa Mah. Katar Street, No:4/B204 Sarıyer, İstanbul, Turkey
| | - Gözde Yalcin-Ozkat
- Bioengineering Department, Faculty of Engineering and Architecture, Recep Tayyip Erdogan University, 53100 Rize, Turkey
- Max Planck Institute for Dynamics of Complex Technical Systems, Molecular Simulations and Design Group, Sandtorstrasse 1, 39106 Magdeburg, Germany
| | - Süreyya Ölgen
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Biruni University, 34010 Topkapı, İstanbul, Turkey
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Baytur S, Diken Turksayar AA. Effects of post-polymerization conditions on color properties, surface roughness, and flexural strength of 3D-printed permanent resin material after thermal aging. J Prosthodont 2023. [PMID: 38102064 DOI: 10.1111/jopr.13818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 12/06/2023] [Accepted: 12/09/2023] [Indexed: 12/17/2023] Open
Abstract
PURPOSE To evaluate the color, surface properties, and flexural strength of 3D-printed permanent crown resin subjected to different post-polymerization conditions after artificial aging. MATERIALS AND METHODS Ninety (10 × 2 mm) disc-shaped specimens were printed by using permanent crown resin with SLA technology. Specimens were divided into nine different groups, subject to post-polymerization conditions at three different times (15, 20, and 30 min) and three different temperatures (40, 60, and 80°C) (n = 10). Color and surface roughness measurements were repeated pre-post thermal aging (5.000 cycles, 5-55°C) and a flexural strength test was carried out. Data were analyzed with Shapiro-Wilk, Kruskal-Wallis, ANOVA, Tukey HSD, and Dunn tests (α < 0.05). RESULTS ΔE00 values showed results below the acceptable color threshold, except for the 30 min 40°C group (ΔE00 <1.8). No difference was found between the relative translucency parameter and surface roughness values of the 20 min 60°C group recommended by the manufacturer and the other groups. A significant difference was found between the flexural strength values of the groups (p < 0.001). CONCLUSIONS The color properties, surface topography, and mechanical properties of the printed permanent crown material were affected by different post-polymerization conditions: polymerized at different times and temperatures. Although the flexural strength and color change values showed promising results, more studies are required to evaluate its suitability for clinical use.
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Affiliation(s)
- Simge Baytur
- Department of Prosthodontics, Faculty of Dentistry, Beykent University, Istanbul, Turkey
| | - Almira Ada Diken Turksayar
- Department of Prosthodontics, Faculty of Dentistry, Biruni University, Istanbul, Turkey
- ADMiRE Research Center-Additive Manufacturing, Intelligent Robotics, Sensors and Engineering, School of Engineering and IT, Carinthia University of Applied Sciences, Villach, Austria
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Fischbach A, Lamberti M, Simons JA, Wrede E, Theißen A, Winnersbach P, Rossaint R, Stollenwerk A, Bleilevens C. Early Blood Clot Detection Using Forward Scattering Light Measurements Is Not Superior to Delta Pressure Measurements. Biosensors (Basel) 2023; 13:1012. [PMID: 38131772 PMCID: PMC10741584 DOI: 10.3390/bios13121012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 11/30/2023] [Accepted: 12/02/2023] [Indexed: 12/23/2023]
Abstract
The occurrence of thrombus formation within an extracorporeal membrane oxygenator is a common complication during extracorporeal membrane oxygenation therapy and can rapidly result in a life-threatening situation due to arterial thromboembolism, causing stroke, pulmonary embolism, and limb ischemia in the patient. The standard clinical practice is to monitor the pressure at the inlet and outlet of oxygenators, indicating fulminant, obstructive clot formation indicated by an increasing pressure difference (ΔP). However, smaller blood clots at early stages are not detectable. Therefore, there is an unmet need for sensors that can detect blood clots at an early stage to minimize the associated thromboembolic risks for patients. This study aimed to evaluate if forward scattered light (FSL) measurements can be used for early blood clot detection and if it is superior to the current clinical gold standard (pressure measurements). A miniaturized in vitro test circuit, including a custom-made test chamber, was used. Heparinized human whole blood was circulated through the test circuit until clot formation occurred. Four LEDs and four photodiodes were placed along the sidewall of the test chamber in different positions for FSL measurements. The pressure monitor was connected to the inlet and the outlet to detect changes in ΔP across the test chamber. Despite several modifications in the LED positions on the test chamber, the FSL measurements could not reliably detect a blood clot within the in vitro test circuit, although the pressure measurements used as the current clinical gold standard detected fulminant clot formation in 11 independent experiments.
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Affiliation(s)
- Anna Fischbach
- Department of Anesthesiology, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (J.A.S.); (A.T.); (P.W.); (R.R.)
| | - Michael Lamberti
- Informatics 11—Embedded Software, RWTH Aachen University, 52074 Aachen, Germany; (M.L.); (E.W.); (A.S.)
| | - Julia Alexandra Simons
- Department of Anesthesiology, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (J.A.S.); (A.T.); (P.W.); (R.R.)
| | - Erik Wrede
- Informatics 11—Embedded Software, RWTH Aachen University, 52074 Aachen, Germany; (M.L.); (E.W.); (A.S.)
| | - Alexander Theißen
- Department of Anesthesiology, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (J.A.S.); (A.T.); (P.W.); (R.R.)
| | - Patrick Winnersbach
- Department of Anesthesiology, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (J.A.S.); (A.T.); (P.W.); (R.R.)
| | - Rolf Rossaint
- Department of Anesthesiology, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (J.A.S.); (A.T.); (P.W.); (R.R.)
| | - André Stollenwerk
- Informatics 11—Embedded Software, RWTH Aachen University, 52074 Aachen, Germany; (M.L.); (E.W.); (A.S.)
| | - Christian Bleilevens
- Department of Anesthesiology, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (J.A.S.); (A.T.); (P.W.); (R.R.)
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Vogel M, Aßenmacher M, Gubler A, Attin T, Schmidlin PR. Cleaning potential of interdental brushes around orthodontic brackets - an in vitro investigation. Swiss Dent J 2023; 133:576-583. [PMID: 37096739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/26/2023]
Abstract
This study evaluated the brushing efficacy of different interdental brushes around a multibracket appliance in vitro. In four models displaying misaligned and aligned teeth with and without attachment loss, the brushing capacities of three interdental brushes (IDB) were tested: A waist-shaped IDB with a diameter of 9 mm at both ends and 5 mm in the middle (B1), a cylindrical brush with a diameter of 9 mm (B2) and one with 5 mm (B3). Before cleaning, the black teeth in the respective models were stained white with titanium (IV) oxide and the percentage of cleaned surface was planimetrically assessed. In addition, the forces applied to the IDB were also recorded. The effect of brush and model on expected cleaning performance was examined using an analysis of variance (ANOVA). The cleaning performance of the brushes in decreasing order was B2>B3>B1; no significant differences between the different tooth areas and models were found. With regard to force measurements, significant differences were found with the highest and lowest forces IDB (2) and (1), respectively. There was a significant correlation between force and cleaning performance: The higher the force needed the higher was the cleaning performance. In summary, this study showed that cylindrical interdental brushes achieved a better cleaning performance than the waist-shaped IDB. Given some shortcomings of this first laboratory study, more research is still needed, but IDB may represent a valuable yet still clinically underused tools.
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Affiliation(s)
- Marc Vogel
- Privatpraxis, Unterägeri, Switzerland
- Klinik für Zahnerhaltung und Präventivzahnmedizin, Zentrum für Zahnmedizin, Universität Zürich, Zurich, Switzerland
| | | | - Andrea Gubler
- Klinik für Zahnerhaltung und Präventivzahnmedizin, Zentrum für Zahnmedizin, Universität Zürich, Zurich, Switzerland
| | - Thomas Attin
- Klinik für Zahnerhaltung und Präventivzahnmedizin, Zentrum für Zahnmedizin, Universität Zürich, Zurich, Switzerland
| | - Patrick R Schmidlin
- Klinik für Zahnerhaltung und Präventivzahnmedizin, Zentrum für Zahnmedizin, Universität Zürich, Zurich, Switzerland
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Jiang Y, Xu Z, Qiu Y, Chen G, Wang S. Evaluation of the antiwear-ability/scratch-resistance efficacy of makeup products by in vitro test method application. Skin Res Technol 2023; 29:e13420. [PMID: 37632176 PMCID: PMC10387595 DOI: 10.1111/srt.13420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 07/17/2023] [Indexed: 08/27/2023]
Abstract
OBJECTIVE The objective of this study is to propose a method for assessing the antiwear-ability (AW) or surface scratch-resistance (SR) efficacy of makeup products through in vitro experiments. MATERIALS AND METHOD The method primarily involves measuring the change in weight as a means of evaluating the overall effectiveness. AW/SR effects are evaluated by applying a fixed amount of makeup product on artificial fake skin and comparing the weight difference after simulated friction/scratch. RESULTS The in vitro results indicate that this method is easy to operate and yields repeatable data. It consistently reflects differences between samples when compared to clinical studies. CONCLUSIONS This method effectively compares the AW/SR effects of makeup products and demonstrates utility in evaluating product efficacy and difference. It holds great scientific and practical value.
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Affiliation(s)
- Yanwen Jiang
- Shanghai China-Norm Quality Technical Service Co., Ltd., Shanghai, China
| | - Zhongmou Xu
- Shanghai China-Norm Quality Technical Service Co., Ltd., Shanghai, China
| | - Yuchen Qiu
- Shanghai China-Norm Quality Technical Service Co., Ltd., Shanghai, China
| | - Gang Chen
- Shanghai Yongxi Information Technology Co, Ltd., Shanghai, China
| | - Sijing Wang
- Shanghai Yongxi Information Technology Co, Ltd., Shanghai, China
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Li D, Gao C, Dai H, Liu H, Li J, Guo W. Must absolutely accurate balloon position be achieved during POT? More in vitro tests, but less clinical evidence. Front Cardiovasc Med 2023; 10:1166020. [PMID: 37265569 PMCID: PMC10229867 DOI: 10.3389/fcvm.2023.1166020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 04/28/2023] [Indexed: 06/03/2023] Open
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Benfante V, Stefano A, Ali M, Laudicella R, Arancio W, Cucchiara A, Caruso F, Cammarata FP, Coronnello C, Russo G, Miele M, Vieni A, Tuttolomondo A, Yezzi A, Comelli A. An Overview of In Vitro Assays of 64Cu-, 68Ga-, 125I-, and 99mTc-Labelled Radiopharmaceuticals Using Radiometric Counters in the Era of Radiotheranostics. Diagnostics (Basel) 2023; 13:diagnostics13071210. [PMID: 37046428 PMCID: PMC10093267 DOI: 10.3390/diagnostics13071210] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Revised: 03/11/2023] [Accepted: 03/17/2023] [Indexed: 04/14/2023] Open
Abstract
Radionuclides are unstable isotopes that mainly emit alpha (α), beta (β) or gamma (γ) radiation through radiation decay. Therefore, they are used in the biomedical field to label biomolecules or drugs for diagnostic imaging applications, such as positron emission tomography (PET) and/or single-photon emission computed tomography (SPECT). A growing field of research is the development of new radiopharmaceuticals for use in cancer treatments. Preclinical studies are the gold standard for translational research. Specifically, in vitro radiopharmaceutical studies are based on the use of radiopharmaceuticals directly on cells. To date, radiometric β- and γ-counters are the only tools able to assess a preclinical in vitro assay with the aim of estimating uptake, retention, and release parameters, including time- and dose-dependent cytotoxicity and kinetic parameters. This review has been designed for researchers, such as biologists and biotechnologists, who would like to approach the radiobiology field and conduct in vitro assays for cellular radioactivity evaluations using radiometric counters. To demonstrate the importance of in vitro radiopharmaceutical assays using radiometric counters with a view to radiogenomics, many studies based on 64Cu-, 68Ga-, 125I-, and 99mTc-labeled radiopharmaceuticals have been revised and summarized in this manuscript.
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Affiliation(s)
- Viviana Benfante
- Ri.MED Foundation, Via Bandiera 11, 90133 Palermo, Italy
- Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties, Molecular and Clinical Medicine, University of Palermo, 90127 Palermo, Italy
- Institute of Molecular Bioimaging and Physiology, National Research Council (IBFM-CNR), 90015 Cefalù, Italy
| | - Alessandro Stefano
- Institute of Molecular Bioimaging and Physiology, National Research Council (IBFM-CNR), 90015 Cefalù, Italy
| | - Muhammad Ali
- Ri.MED Foundation, Via Bandiera 11, 90133 Palermo, Italy
- Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties, Molecular and Clinical Medicine, University of Palermo, 90127 Palermo, Italy
| | | | - Walter Arancio
- Ri.MED Foundation, Via Bandiera 11, 90133 Palermo, Italy
| | - Antonino Cucchiara
- Department of Diagnostic and Therapeutic Services, IRCCS-ISMETT (Mediterranean Institute for Transplantation and Advanced Specialized Therapies), Via Tricomi 5, 90127 Palermo, Italy
| | - Fabio Caruso
- Department of Diagnostic and Therapeutic Services, IRCCS-ISMETT (Mediterranean Institute for Transplantation and Advanced Specialized Therapies), Via Tricomi 5, 90127 Palermo, Italy
| | - Francesco Paolo Cammarata
- Institute of Molecular Bioimaging and Physiology, National Research Council (IBFM-CNR), 90015 Cefalù, Italy
| | - Claudia Coronnello
- Ri.MED Foundation, Via Bandiera 11, 90133 Palermo, Italy
- National Biodiversity Future Center (NBFC), 90133 Palermo, Italy
| | - Giorgio Russo
- Institute of Molecular Bioimaging and Physiology, National Research Council (IBFM-CNR), 90015 Cefalù, Italy
- National Biodiversity Future Center (NBFC), 90133 Palermo, Italy
| | - Monica Miele
- Ri.MED Foundation, Via Bandiera 11, 90133 Palermo, Italy
| | - Alessandra Vieni
- Department of Diagnostic and Therapeutic Services, IRCCS-ISMETT (Mediterranean Institute for Transplantation and Advanced Specialized Therapies), Via Tricomi 5, 90127 Palermo, Italy
| | - Antonino Tuttolomondo
- Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties, Molecular and Clinical Medicine, University of Palermo, 90127 Palermo, Italy
| | - Anthony Yezzi
- Department of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Albert Comelli
- Ri.MED Foundation, Via Bandiera 11, 90133 Palermo, Italy
- National Biodiversity Future Center (NBFC), 90133 Palermo, Italy
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Ueoka AR, Sufi BS, Magalhães WV, Fernandes L, Andreo-Filho N, Leite-Silva VR, Lopes PS. Flow cytometry as an alternative method to evaluate genotoxicity of natural cosmetic actives. J Cosmet Dermatol 2023; 22:958-968. [PMID: 36250215 DOI: 10.1111/jocd.15473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 09/22/2022] [Accepted: 10/03/2022] [Indexed: 11/28/2022]
Abstract
Alternative in vitro methods are important, as there is a call to ban the use of animals in cosmetics research. AIM To suggest the expansion of the use of in vitro safety techniques recommended by the OECD guidelines and to propose the use of the automation of the in vitro mammalian micronucleus test method by flow cytometry to assess the genotoxic potential of Centella asiatica, Horse Chestnut, Witch Hazel, Blend, Ecoblend, and Caffeine extracts due to their widespread use in commercial products. METHODS Flow cytometer analysis was performed using the Accuri™ C6 equipment and analyzed using the FlowJo software. Cytotoxicity tests followed OECD 129 guidelines and Phototoxicity followed OECD/GD 432 guidelines. RESULTS The results showed that the cytotoxicity assay presented a decrease in cell viability when cells were exposed to Centella asiatica from a concentration of 5.0%, horse chestnut 2.5%, Witch hazel 2.5%, Blend 3.13%, and Caffeine 3%, while Ecoblend at the tested concentrations did not show cytotoxicity. In the phototoxicity test, the samples at the tested concentrations showed a PIF <2 being considered potentially non-phototoxic. Finally, in the genotoxicity automated assay, samples were considered potentially non-genotoxic. CONCLUSION In vitro methods are of paramount importance for the development of pre-clinical tests and the use of test automation helps to reduce the time for analysis and dissemination of results, being a determining factor for the prospect of new compounds.
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Affiliation(s)
- Andreza R Ueoka
- Instituto de Ciências Ambientais Químicas e Farmacêuticas, Universidade Federal de São Paulo, Diadema, SP, Brazil
| | | | | | - Liliam Fernandes
- Instituto de Ciências Ambientais Químicas e Farmacêuticas, Universidade Federal de São Paulo, Diadema, SP, Brazil
| | - Newton Andreo-Filho
- Instituto de Ciências Ambientais Químicas e Farmacêuticas, Universidade Federal de São Paulo, Diadema, SP, Brazil
| | - Vania R Leite-Silva
- Instituto de Ciências Ambientais Químicas e Farmacêuticas, Universidade Federal de São Paulo, Diadema, SP, Brazil
| | - Patricia S Lopes
- Instituto de Ciências Ambientais Químicas e Farmacêuticas, Universidade Federal de São Paulo, Diadema, SP, Brazil
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Sanaullah AFM, Devi P, Hossain T, Sultan SB, Badhon MMU, Hossain ME, Uddin J, Patwary MAM, Kazi M, Matin MM. Rhamnopyranoside-Based Fatty Acid Esters as Antimicrobials: Synthesis, Spectral Characterization, PASS, Antimicrobial, and Molecular Docking Studies. Molecules 2023; 28:molecules28030986. [PMID: 36770652 PMCID: PMC9919056 DOI: 10.3390/molecules28030986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 01/07/2023] [Accepted: 01/10/2023] [Indexed: 01/21/2023] Open
Abstract
The most widely used and accessible monosaccharides have a number of stereogenic centers that have been hydroxylated and are challenging to chemically separate. As a result, the task of regioselective derivatization of such structures is particularly difficult. Considering this fact and to get novel rhamnopyranoside-based esters, DMAP-catalyzed di-O-stearoylation of methyl α-l-rhamnopyranoside (3) produced a mixture of 2,3-di-O- (4) and 3,4-di-O-stearates (5) (ratio 2:3) indicating the reactivity of the hydroxylated stereogenic centers of rhamnopyranoside as 3-OH > 4-OH > 2-OH. To get novel biologically active rhamnose esters, di-O-stearates 4 and 5 were converted into six 4-O- and 2-O-esters 6-11, which were fully characterized by FT-IR, 1H, and 13C NMR spectral techniques. In vitro antimicrobial assays revealed that fully esterified rhamnopyranosides 6-11 with maximum lipophilic character showed better antifungal susceptibility than antibacterial activity. These experimental findings are similar to the results found from PASS analysis data. Furthermore, the pentanoyl derivative of 2,3-di-O-stearate (compound 6) showed better antifungal functionality against F. equiseti and A. flavus, which were found to be better than standard antibiotics. To validate the better antifungal results, molecular docking of the rhamnose esters 4-11 was performed with lanosterol 14α-demethylase (PDB ID: 3LD6), including the standard antifungal antibiotics ketoconazole and fluconazole. In this instance, the binding affinities of 10 (-7.6 kcal/mol), 9 (-7.5 kcal/mol), and 7 (-6.9 kcal/mol) were better and comparable to fluconazole (-7.3 kcal/mol), indicating the likelihood of their use as non-azole type antifungal drugs in the future.
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Affiliation(s)
- Abul Fazal Muhammad Sanaullah
- Bioorganic and Medicinal Chemistry Laboratory, Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong 4331, Bangladesh
| | - Puja Devi
- Bioorganic and Medicinal Chemistry Laboratory, Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong 4331, Bangladesh
| | - Takbir Hossain
- Bioorganic and Medicinal Chemistry Laboratory, Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong 4331, Bangladesh
| | - Sulaiman Bin Sultan
- Bioorganic and Medicinal Chemistry Laboratory, Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong 4331, Bangladesh
| | - Mohammad Mohib Ullah Badhon
- Bioorganic and Medicinal Chemistry Laboratory, Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong 4331, Bangladesh
| | - Md. Emdad Hossain
- Wazed Miah Science Research Centre (WMSRC), Jahangirnagar University, Savar, Dhaka 1342, Bangladesh
| | - Jamal Uddin
- Center for Nanotechnology, Department of Natural Sciences, Coppin State University, Baltimore, MD 21216, USA
| | | | - Mohsin Kazi
- Department of Pharmaceutics, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
- Correspondence: (M.K.); (M.M.M.); Tel.: +880-1716-839689 (M.M.M.)
| | - Mohammed Mahbubul Matin
- Bioorganic and Medicinal Chemistry Laboratory, Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong 4331, Bangladesh
- Correspondence: (M.K.); (M.M.M.); Tel.: +880-1716-839689 (M.M.M.)
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11
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Rocha DDO, Roque RMDS, de Souza Vieira T, de Jesus ILR, Guimarães BG, Rocha MBDS, Scott FB, Avelar BR. Evaluation of the susceptibility to fipronil of Rhipicephalus microplus larvae from egg masses incubated at different times of oviposition. Braz J Vet Med 2023; 45:e005922. [PMID: 37040296 PMCID: PMC10079253 DOI: 10.29374/2527-2179.bjvm005922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Accepted: 03/06/2023] [Indexed: 04/12/2023] Open
Abstract
The objective of this work was to evaluate the susceptibility of R. microplus larvae from different oviposition times to fipronil. The LPT was performed in sextuplicate, at concentrations of 18.75, 37.5, 75, 150 and 300 µg.mL-1. The LC50 found for the egg masses incubated with +7, +14 and +21 days were respectively 105.87, 110.71 and 121.22 µg.mL-1. The larvae originating from egg masses from the same group of engorged females, incubated on different days, presented similar mortality rates compared to the evaluated fipronil concentrations, facilitating the maintenance of laboratory colonies of this tick species.
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Affiliation(s)
- Daniela de Oliveira Rocha
- 1- Undergraduate in Veterinary Medicine, Instituto de Veterinária (IV), Universidade Federal Rural do Rio de Janeiro. Seropédica, RJ, Brazil
| | - Roxanne Marina da Silva Roque
- 2- Veterinarian, Resident. Programa de Residência em Medicina Veterinária - Diagnóstico em Parasitologia Animal, IV, UFRRJ. Seropédica, RJ, Brazil
| | - Thiago de Souza Vieira
- 3- Undergraduate in Zootechnics, Instituto de Zootecnia (IZ), UFRRJ. Seropédica, RJ, Brazil
| | - Ingrid Lins Raquel de Jesus
- 4- Pharmacist, Programa de Pós-Graduação em Ciências Veterinárias (PPGCV), Departamento de Parasitologia Animal (DPA), IV, UFRRJ. Seropédica, RJ. Brazil
| | | | | | - Fabio Barbour Scott
- Veterinarian, DSc. Departamento de Parasitologia Animal (DPA), Instituto de Veterinária (IV), Universidade Federal Rural do Rio de Janeiro (UFRRJ). Seropédica, RJ, Brazil
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12
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Mattoo SUS, Aganja RP, Kim SC, Jeong CG, Nazki S, Khatun A, Kim WI, Lee SM. A standardized method to study immune responses using porcine whole blood. J Vet Sci 2023; 24:e11. [PMID: 36726276 PMCID: PMC9899947 DOI: 10.4142/jvs.22210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Revised: 11/01/2022] [Accepted: 11/08/2022] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Peripheral blood mononuclear cells (PBMCs) are commonly used to assess in vitro immune responses. However, PBMC isolation is a time-consuming procedure, introduces technical variability, and requires a relatively large volume of blood. By contrast, whole blood assay (WBA) is faster, cheaper, maintains more physiological conditions, and requires less sample volume, laboratory training, and equipment. OBJECTIVES Herein, this study aimed to develop a porcine WBA for in vitro evaluation of immune responses. METHODS Heparinized whole blood (WB) was diluted (non-diluted, 1/2, 1/8, and 1/16) in RPMI-1640 media, followed by phorbol myristate acetate and ionomycin. After 24 h, cells were stained for interferon (IFN)-γ secreting T-cells followed by flow cytometry, and the supernatant was analyzed for tumor necrosis factor (TNF)-α. In addition, diluted WB was stimulated by lipopolysaccharide (LPS) and polyinosinic:polycytidylic acid (poly I:C), reference strain KCTC3557 (RS), field isolate (FI), of heat-killed (HK) Streptococcus suis, and porcine reproductive and respiratory syndrome virus (PRRSV). RESULTS The frequency of IFN-γ+CD3+ T-cells and concentration of TNF-α in the supernatant of WB increased with increasing dilution factor and were optimal at 1/8. WB TNF-α and interleukin (IL)-10 cytokine levels increased significantly following stimulation with LPS or poly I:C. Further, FI and RS induced IL-10 production in WB. Additionally, PRRSV strains increased the frequency of IFN-γ+CD4-CD8+ cells, and IFN-γ was non-significantly induced in the supernatant of re-stimulated samples. CONCLUSIONS We propose that the WBA is a rapid, reliable, and simple method to evaluate immune responses and WB should be diluted to trigger immune cells.
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Affiliation(s)
| | - Ram Prasad Aganja
- College of Veterinary Medicine, Jeonbuk National University, Iksan 54596, Korea
| | - Seung-Chai Kim
- College of Veterinary Medicine, Jeonbuk National University, Iksan 54596, Korea
| | - Chang-Gi Jeong
- College of Veterinary Medicine, Jeonbuk National University, Iksan 54596, Korea
| | - Salik Nazki
- The Pirbright Institute, Pirbright, GU24 0NF, United Kingdom
| | - Amina Khatun
- Department of Veterinary Pathology, Faculty of Animal Science and Veterinary Medicine, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh
| | - Won-Il Kim
- College of Veterinary Medicine, Jeonbuk National University, Iksan 54596, Korea.
| | - Sang-Myeong Lee
- College of Veterinary Medicine, Chungbuk National University, Cheongju 28644, Korea.
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13
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Štrbac F, Krnjajić S, Maurelli MP, Stojanović D, Simin N, Orčić D, Ratajac R, Petrović K, Knežević G, Cringoli G, Rinaldi L, Bosco A. A Potential Anthelmintic Phytopharmacological Source of Origanum vulgare (L.) Essential Oil against Gastrointestinal Nematodes of Sheep. Animals (Basel) 2022; 13. [PMID: 36611652 DOI: 10.3390/ani13010045] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 12/18/2022] [Accepted: 12/19/2022] [Indexed: 12/25/2022] Open
Abstract
The development of anthelmintic resistance in sheep gastrointestinal nematodes (GINs) requires novel strategies for the sustainable control of these parasites. This study aimed to evaluate the anthelmintic efficacy of the Origanum vulgare (L.) essential oil (EO) against sheep GINs and to evaluate the possibility of its use in control practice. The in vitro egg hatch test was conducted at eight different concentrations (50, 12.5, 3.125, 0.781, 0.195, 0.049, 0.025, and 0.0125 mg/mL) of the tested EO. For the in vivo fecal egg count reduction test, the EO of O. vulgare was administrated orally at a mean single dose of 150 mg/kg to sheep from two farms in Southern Italy, whereby potential toxic effects to the hosts were also evaluated. In the egg hatch test, the inhibition of egg hatchability varied from 71.3% to 93.7%, depending on the concentration used. The high anthelmintic potential was confirmed in the fecal egg count reduction test with an average reduction of nematode eggs in feces of 43.2% and 60.1% on days 7 and 14 after treatment, respectively. In addition, no toxic effects were noticed during the clinical examination of sheep or by observing blood count and liver or kidney function test results. The obtained results suggest the strong activity of the O. vulgare EO against sheep GINs, probably due to a high percentage of carvacrol (76.21%), whereby it can be considered safe for sheep at the dose tested in vivo. Therefore, it is suitable for use in veterinary practice as a part of an integrated strategy for the control of sheep GINs.
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14
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Palomares F, Paris JL, Labella M, Doña I, Mayorga C, Torres MJ. Drug hypersensitivity, in vitro tools, biomarkers, and burden with COVID-19 vaccines. Allergy 2022; 77:3527-3537. [PMID: 35912413 PMCID: PMC9537799 DOI: 10.1111/all.15461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Revised: 07/11/2022] [Accepted: 07/28/2022] [Indexed: 01/28/2023]
Abstract
Hypersensitivity reactions to drugs are increasing worldwide. They display a large degree of variability in the immunological mechanisms involved, which impacts both disease severity and the optimal diagnostic procedure. Therefore, drug hypersensitivity diagnosis relies on both in vitro and in vivo assessments, although most of the methods are not well standardized. Moreover, several biomarkers can be used as valuable parameters for precision medicine that provide information on the endotypes, diagnosis, prognosis, and prediction of drug hypersensitivity development, as well on the identification of therapeutic targets and treatment efficacy monitoring. Furthermore, in the last 2 years, the SARS-CoV-2 (severe acute respiratory syndrome-coronavirus) pandemic has had an important impact on health system, leading us to update approaches on how to manage hypersensitivity reactions to drugs used for its treatment and on COVID-19 (Coronavirus disease) vaccines used for its prevention. This article reviews recent advances in these 3 areas regarding drug hypersensitivity: in vitro tools for drug hypersensitivity diagnosis, recently identified biomarkers that could guide clinical decision making and management of hypersensitivity reactions to drugs and vaccines used for COVID-19.
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Affiliation(s)
- Francisca Palomares
- Allergy Research GroupInstituto de Investigación Biomédica de Málaga‐IBIMA‐ARADyALMálagaSpain
| | - Juan L. Paris
- Allergy Research GroupInstituto de Investigación Biomédica de Málaga‐IBIMA‐ARADyALMálagaSpain,Andalusian Center for Nanomedicine and Biotechnology‐BIONANDMálagaSpain
| | - Marina Labella
- Allergy Research GroupInstituto de Investigación Biomédica de Málaga‐IBIMA‐ARADyALMálagaSpain,Allergy UnitHospital Regional Universitario de Málaga‐ARADyALMálagaSpain
| | - Inmaculada Doña
- Allergy Research GroupInstituto de Investigación Biomédica de Málaga‐IBIMA‐ARADyALMálagaSpain,Allergy UnitHospital Regional Universitario de Málaga‐ARADyALMálagaSpain
| | - Cristobalina Mayorga
- Allergy Research GroupInstituto de Investigación Biomédica de Málaga‐IBIMA‐ARADyALMálagaSpain,Andalusian Center for Nanomedicine and Biotechnology‐BIONANDMálagaSpain,Allergy UnitHospital Regional Universitario de Málaga‐ARADyALMálagaSpain
| | - María José Torres
- Allergy Research GroupInstituto de Investigación Biomédica de Málaga‐IBIMA‐ARADyALMálagaSpain,Andalusian Center for Nanomedicine and Biotechnology‐BIONANDMálagaSpain,Allergy UnitHospital Regional Universitario de Málaga‐ARADyALMálagaSpain,Departamento de MedicinaUniversidad de MálagaMálagaSpain
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15
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Chen J, Zhang H, Guo Q, He S, Xu L, Zhang Z, Ma J, Chu H. In Vitro Activity of Rifabutin against Mycobacterium abscessus, Including Clarithromycin-Insusceptible Multidrug-Resistant Clinical Isolates. Clin Exp Pharmacol Physiol 2022; 49:767-775. [PMID: 35531776 DOI: 10.1111/1440-1681.13651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 04/27/2022] [Accepted: 04/28/2022] [Indexed: 11/30/2022]
Abstract
The antibiotic options available for Mycobacterium abscessus (M. abscessus) infection are limited and no definitive therapeutic strategies have been formulated. The recent discovery that rifabutin is active against M. abscessus has raised interest in using rifabutin to treat this intractable disease. In this study, we evaluated the in vitro activity of rifabutin against 194 M. abscessus clinical isolates collected during 2012 January to 2017 December. As respected, rifabutin demonstrated considerably lower MICs against M. abscessus, with an MIC50 of 2μg/ml and MIC90 of 4μg/ml, respectively. Notably, the anti-M.abscessus activity was even stronger among clarithromycin-insusceptible strains. In addition, M. abscessus isolates with a rough morphotype were more sensitive to rifabutin compared with those forming smooth colonies when considered as a whole or in separate subspecies. Results from synergistic experiments revealed that the in vitro activity of rifabutin was significantly enhanced by the addition of amikacin, suggesting a promising strategy for M. abscessus infection combination treatment. Finally, five and three mutation patterns in rpoB and arr, respectively, were identified among the 194 strains through whole genome sequencing. However, none of them conferred rifabutin resistance. Our study is among the first to report the susceptibility of M. abscessus to rifabutin in vitro with a large amount of clinical isolates, suggesting that rifabutin is active, both alone and in combination, against M. abscessus and is worth considering as part of a combination treatment regimen for M. abscessus infections.
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Affiliation(s)
- Jianhui Chen
- Department of Respiratory and Critical Care Medicine, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China.,School of Medicine, Tongji University, Shanghai, China
| | - Haonan Zhang
- Department of Respiratory and Critical Care Medicine, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China.,School of Medicine, Tongji University, Shanghai, China
| | - Qi Guo
- Department of Respiratory and Critical Care Medicine, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China.,School of Medicine, Tongji University, Shanghai, China
| | - Siyuan He
- Department of Respiratory and Critical Care Medicine, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China.,School of Medicine, Tongji University, Shanghai, China
| | - Liyun Xu
- Department of Respiratory and Critical Care Medicine, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Zhemin Zhang
- Department of Respiratory and Critical Care Medicine, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Jian Ma
- Department of Respiratory and Critical Care Medicine, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Haiqing Chu
- Department of Respiratory and Critical Care Medicine, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China.,Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
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16
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Huang HL, Tsai HL, Wu YL, Hsu JT, Wu AY. Biomechanical Evaluation of Bone Atrophy and Implant Length in Four Implants Supporting Mandibular Full-Arch-Fixed Dentures. Materials (Basel) 2022; 15. [PMID: 35591628 DOI: 10.3390/ma15093295] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 05/01/2022] [Accepted: 05/01/2022] [Indexed: 12/04/2022]
Abstract
Residual alveolar ridge resorption often occurs after tooth extraction, which causes issues requiring further prothesis rehabilitation. A treatment concept referred to as all-on-four, involving fixed dentures supported with four implants, was recently developed. The current study aimed to determine the effect of changing bone atrophy and implant length in all-on-four treatments on stress and strain in the surrounding bone of the implant. A three-dimensional finite element method was used in this research. The stress analysis was conducted with von Mises stress values. Two types of synthetic jawbone models with mild and moderate atrophy were used. Furthermore, two different implant lengths with a similar implant design and diameter were selected, and they were classified into eight models. Then, the bone model was assessed via a computed tomography (CT) scan and was transformed into a virtual model in Geomagic and SolidWorks with implant rebuilding. After modifying bone atrophy, the von Mises stresses in the surrounding bone of the implant were as follows: mild type 2 < mild type 3 < moderate type 3 < moderate type 4. The bone quantity change rate increased more than when bone conditions were limited. Compared with changes in implant lengths, the stresses in the peri-implant surrounding bone were generally higher in the 9 mm implant length group than in the 11.5 mm group. However, the results did not significantly differ. In conclusion, the von Mises stress and strain increased in the models with moderate atrophy and low-density trabecular bone. Hence, bone atrophy and its presurgical diagnosis in long-term implant prognosis are crucial.
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17
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Štrbac F, Bosco A, Maurelli MP, Ratajac R, Stojanović D, Simin N, Orčić D, Pušić I, Krnjajić S, Sotiraki S, Saralli G, Cringoli G, Rinaldi L. Anthelmintic Properties of Essential Oils to Control Gastrointestinal Nematodes in Sheep-In Vitro and In Vivo Studies. Vet Sci 2022; 9:vetsci9020093. [PMID: 35202346 PMCID: PMC8880401 DOI: 10.3390/vetsci9020093] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 02/08/2022] [Accepted: 02/16/2022] [Indexed: 02/01/2023] Open
Abstract
Herbal products such as essential oils may play a promising role in the treatment of infections caused by gastrointestinal nematodes (GINs). The aim of this study was to evaluate the in vitro potential of 11 essential oils (EOs) and one binary combination of isolated EO compounds, as well as the in vivo anthelmintic efficacy of two EO formulations. Four GIN genera were identified in the coproculture examination: Haemonchus, Trichostrongylus, Teladorsagia and Chabertia. The in vitro egg hatch test (EHT) was performed at six different concentrations (50, 12.5, 3.125, 0.781, 0.195 and 0.049 mg/mL) for each EO, whereas in the in vivo faecal egg count reduction test (FECRT), each EO sample was diluted in sunflower oil and orally administrated at a dose of 100 mg/kg to the different group of animals. In the EHT, the EOs of Origanum vulgare, Foeniculum vulgare, Satureja montana, Satureja hortensis and two types of Thymus vulgaris were the most effective. The dominant compounds of these EOs were carvacrol, thymol, anethol, p-cymene and γ-terpinene, indicating their importance for the anthelmintic activity. In the FECRT, both T. vulgaris EO type 1 and linalool:estragole combination show an anthelmintic potential with a mean effect on FECR of approximately 25%. The results suggest the possible role of tested EOs as anthelmintic agents in sheep farms, although further in vivo tests are needed.
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Affiliation(s)
- Filip Štrbac
- Department of Veterinary Medicine, Faculty of Agriculture, University of Novi Sad, Trg Dositeja Obradovića 8, 21102 Novi Sad, Serbia;
- Correspondence: ; Tel.: +381-613181091
| | - Antonio Bosco
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, CREMOPAR, Via Federico Delpino 1, 80137 Naples, Italy; (A.B.); (M.P.M.); (G.C.); (L.R.)
| | - Maria Paola Maurelli
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, CREMOPAR, Via Federico Delpino 1, 80137 Naples, Italy; (A.B.); (M.P.M.); (G.C.); (L.R.)
| | - Radomir Ratajac
- Scientific Veterinary Institute Novi Sad, Rumenački put 20, 21113 Novi Sad, Serbia; (R.R.); (I.P.)
| | - Dragica Stojanović
- Department of Veterinary Medicine, Faculty of Agriculture, University of Novi Sad, Trg Dositeja Obradovića 8, 21102 Novi Sad, Serbia;
| | - Nataša Simin
- Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, 21102 Novi Sad, Serbia; (N.S.); (D.O.)
| | - Dejan Orčić
- Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, 21102 Novi Sad, Serbia; (N.S.); (D.O.)
| | - Ivan Pušić
- Scientific Veterinary Institute Novi Sad, Rumenački put 20, 21113 Novi Sad, Serbia; (R.R.); (I.P.)
| | - Slobodan Krnjajić
- Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030 Belgrade, Serbia;
| | - Smaragda Sotiraki
- Veterinary Research Institute, National Agricultural Research Foundation, NAGREF Campus, 57001 Thessaloniki, Greece;
| | - Giorgio Saralli
- Experimental Zooprophylactic Institute of Lazio and Tuscany M. Aleandri, Via Appia Nuova, 00178 Rome, Italy;
| | - Giuseppe Cringoli
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, CREMOPAR, Via Federico Delpino 1, 80137 Naples, Italy; (A.B.); (M.P.M.); (G.C.); (L.R.)
| | - Laura Rinaldi
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, CREMOPAR, Via Federico Delpino 1, 80137 Naples, Italy; (A.B.); (M.P.M.); (G.C.); (L.R.)
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18
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Lin SJ, Lin JA, Yu W, Lee C, Hung CY, Poplawsky JD, Liaw PK, Chou YC. Biocompatibility of NbTaTiVZr with Surface Modifications for Osteoblasts. ACS Appl Bio Mater 2022; 5:642-649. [PMID: 35080840 DOI: 10.1021/acsabm.1c01103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report a potential biomedical material, NbTaTiVZr, and the impact of surface roughness on the osteoblast culture and later behavior based on in vitro tests of preosteoblasts. Cell activities such as adhesion, viability, and typical protein activity on NbTaTiVZr showed comparable results with that of commercially pure Ti (CP-Ti). In addition, NbTaTiVZr with a smooth surface exhibits better cell adhesion, viability, and typical protein activity which shows that surface modification can improve the biocompatibility of NbTaTiVZr. This supports the biological evidence and shows that NbTaTiVZr can potentially be evaluated as a biomedical material for clinical use.
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Affiliation(s)
- Shih-Jie Lin
- Department of Orthopaedic Surgery, New Taipei Municipal TuCheng Hospital, Chang Gung Memorial Hospital, New Taipei City 23653, Taiwan.,Bone and Joint Research Center, Chang Gung Memorial Hospital, Linkou 33305, Taiwan.,Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30010, Taiwan
| | - Jia-An Lin
- Department of Electrophysics, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
| | - Wei Yu
- Department of Electrophysics, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
| | - Chanho Lee
- Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996-2100, United States.,Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Chun-Yu Hung
- Department of Orthopaedic Surgery, Chang Gung Memorial Hospital, Yunlin 63863, Taiwan
| | - Jonathan D Poplawsky
- Center for Nanophases Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Peter K Liaw
- Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996-2100, United States
| | - Yi-Chia Chou
- Department of Electrophysics, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan.,Department of Materials Science and Engineering, National Taiwan University, Taipei 10617, Taiwan
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19
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Berti F, Antonini L, Poletti G, Fiuza C, Vaughan TJ, Migliavacca F, Petrini L, Pennati G. How to Validate in silico Deployment of Coronary Stents: Strategies and Limitations in the Choice of Comparator. Front Med Technol 2022; 3:702656. [PMID: 35047942 PMCID: PMC8757815 DOI: 10.3389/fmedt.2021.702656] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 07/01/2021] [Indexed: 11/13/2022] Open
Abstract
This study aims at proposing and discussing useful indications to all those who need to validate a numerical model of coronary stent deployment. The proof of the reliability of a numerical model is becoming of paramount importance in the era of in silico trials. Recently, the ASME V&V Standard Committee for medical devices prepared the V&V 40 standard document that provides a framework that guides users in establishing and assessing the relevance and adequacy of verification and validation activities performed for proving the credibility of models. To the knowledge of the authors, only a few examples of the application of the V&V 40 framework to medical devices are available in the literature, but none about stents. Specifically, in this study, the authors wish to emphasize the choice of a relevant set of experimental activities to provide data for the validation of computational models aiming to predict coronary stent deployment. Attention is focused on the use of ad hoc 3D-printed mock vessels in the validation plan, which could allow evaluating aspects of clinical relevance in a representative but controlled environment.
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Affiliation(s)
- Francesca Berti
- Laboratory of Biological Structure Mechanics, Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Milan, Italy
| | - Luca Antonini
- Laboratory of Biological Structure Mechanics, Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Milan, Italy
| | - Gianluca Poletti
- Laboratory of Biological Structure Mechanics, Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Milan, Italy
| | - Constantino Fiuza
- Biomechanics Research Center (BioMEC), Biomedical Engineering, School of Engineering, College of Science and Engineering, National University of Ireland Galway, Galway, Ireland
| | - Ted J Vaughan
- Biomechanics Research Center (BioMEC), Biomedical Engineering, School of Engineering, College of Science and Engineering, National University of Ireland Galway, Galway, Ireland
| | - Francesco Migliavacca
- Laboratory of Biological Structure Mechanics, Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Milan, Italy
| | - Lorenza Petrini
- Department of Civil and Environmental Engineering, Politecnico di Milano, Milan, Italy
| | - Giancarlo Pennati
- Laboratory of Biological Structure Mechanics, Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Milan, Italy
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20
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Aparicio-Soto M, Curato C, Riedel F, Thierse HJ, Luch A, Siewert K. In Vitro Monitoring of Human T Cell Responses to Skin Sensitizing Chemicals-A Systematic Review. Cells 2021; 11:cells11010083. [PMID: 35011644 PMCID: PMC8750770 DOI: 10.3390/cells11010083] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 12/21/2021] [Accepted: 12/23/2021] [Indexed: 12/12/2022] Open
Abstract
Background: Chemical allergies are T cell-mediated diseases that often manifest in the skin as allergic contact dermatitis (ACD). To prevent ACD on a public health scale and avoid elicitation reactions at the individual patient level, predictive and diagnostic tests, respectively, are indispensable. Currently, there is no validated in vitro T cell assay available. The main bottlenecks concern the inefficient generation of T cell epitopes and the detection of rare antigen-specific T cells. Methods: Here, we systematically review original experimental research papers describing T cell activation to chemical skin sensitizers. We focus our search on studies published in the PubMed and Scopus databases on non-metallic allergens in the last 20 years. Results: We identified 37 papers, among them 32 (86%) describing antigen-specific human T cell activation to 31 different chemical allergens. The remaining studies measured the general effects of chemical allergens on T cell function (five studies, 14%). Most antigen-specific studies used peripheral blood mononuclear cells (PBMC) as antigen-presenting cells (APC, 75%) and interrogated the blood T cell pool (91%). Depending on the individual chemical properties, T cell epitopes were generated either by direct administration into the culture medium (72%), separate modification of autologous APC (29%) or by use of hapten-modified model proteins (13%). Read-outs were mainly based on proliferation (91%), often combined with cytokine secretion (53%). The analysis of T cell clones offers additional opportunities to elucidate the mechanisms of epitope formation and cross-reactivity (13%). The best researched allergen was p-phenylenediamine (PPD, 12 studies, 38%). For this and some other allergens, stronger immune responses were observed in some allergic patients (15/31 chemicals, 48%), illustrating the in vivo relevance of the identified T cells while detection limits remain challenging in many cases. Interpretation: Our results illustrate current hardships and possible solutions to monitoring T cell responses to individual chemical skin sensitizers. The provided data can guide the further development of T cell assays to unfold their full predictive and diagnostic potential, including cross-reactivity assessments.
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Affiliation(s)
- Marina Aparicio-Soto
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment, 10589 Berlin, Germany; (M.A.-S.); (C.C.); (F.R.); (H.-J.T.); (A.L.)
| | - Caterina Curato
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment, 10589 Berlin, Germany; (M.A.-S.); (C.C.); (F.R.); (H.-J.T.); (A.L.)
| | - Franziska Riedel
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment, 10589 Berlin, Germany; (M.A.-S.); (C.C.); (F.R.); (H.-J.T.); (A.L.)
- Institute of Pharmacy, Freie Universität Berlin, 14195 Berlin, Germany
| | - Hermann-Josef Thierse
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment, 10589 Berlin, Germany; (M.A.-S.); (C.C.); (F.R.); (H.-J.T.); (A.L.)
| | - Andreas Luch
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment, 10589 Berlin, Germany; (M.A.-S.); (C.C.); (F.R.); (H.-J.T.); (A.L.)
- Institute of Pharmacy, Freie Universität Berlin, 14195 Berlin, Germany
| | - Katherina Siewert
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment, 10589 Berlin, Germany; (M.A.-S.); (C.C.); (F.R.); (H.-J.T.); (A.L.)
- Correspondence: ; Tel.: +49-(0)30-18412-57001
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Zheng Y, He T, Xie T, Wang J, Yang Z, Sun X, Wang W, Li S. Hydroxy-selenomethionine supplementation promotes the in vitro rumen fermentation of dairy cows by altering the relative abundance of rumen microorganisms. J Appl Microbiol 2021; 132:2583-2593. [PMID: 34847280 PMCID: PMC9299881 DOI: 10.1111/jam.15392] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Revised: 11/25/2021] [Accepted: 11/28/2021] [Indexed: 10/25/2022]
Abstract
AIMS This study aims to investigate the effect of hydroxy-selenomethionine supplementation on the in vitro rumen fermentation characteristics and microorganisms of Holstein cows. METHODS AND RESULTS Five fermentation substrates, including control (without selenium supplementation, CON), sodium selenite supplementation (0.3 mg kg-1 DM, SS03), and hydroxy-selenomethionine supplementation (0.3, 0.6 and 0.9 mg kg-1 DM, SM03, SM06 and SM09, respectively) were incubated with rumen fluid in vitro. The results showed that in vitro dry matter disappearance and gas production at 48 h was significantly higher in SM06 than SM03, SS03 and CON; propionate and total volatile fatty acid (VFA) production was higher in SM06 than CON. Moreover, higher species richness of rumen fluid was found in SM06 than others. Higher relative abundance of Prevotella and Prevotellaceae-UCG-003 and lower relative abundance of Ruminococcus-1 were detected in SM06 than CON. Besides, higher relative abundance of Ruminococcaceae_UCG-005 was found in CON than other treatments. CONCLUSIONS It is observed that 0.6 mg kg-1 DM hydroxy-selenomethionine supplementation could increase cumulative gas production, propionate, and total VFAs production by altering the relative abundance of Prevotella, Prevotellaceae-UCG-003, Ruminococcaceae_UCG-005 and Ruminococcus-1, so that it can be used as a rumen fermentation regulator in Holstein cows. SIGNIFICANCE AND IMPACT OF THE STUDY This study provides an optimal addition ratio of hydroxy-selenomethionine on rumen fermentation and bacterial composition via an in vitro test.
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Affiliation(s)
- Yuhui Zheng
- State Key Laboratory of Animal Nutrition, Beijing Engineering Technology Research Center of Raw Milk Quality and Safety Control, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Tengfei He
- State Key Laboratory of Animal Nutrition, Beijing Engineering Technology Research Center of Raw Milk Quality and Safety Control, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Tian Xie
- State Key Laboratory of Animal Nutrition, Beijing Engineering Technology Research Center of Raw Milk Quality and Safety Control, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Jidong Wang
- State Key Laboratory of Animal Nutrition, Beijing Engineering Technology Research Center of Raw Milk Quality and Safety Control, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Zhantao Yang
- State Key Laboratory of Animal Nutrition, Beijing Engineering Technology Research Center of Raw Milk Quality and Safety Control, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Xiaoge Sun
- State Key Laboratory of Animal Nutrition, Beijing Engineering Technology Research Center of Raw Milk Quality and Safety Control, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Wei Wang
- State Key Laboratory of Animal Nutrition, Beijing Engineering Technology Research Center of Raw Milk Quality and Safety Control, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Shengli Li
- State Key Laboratory of Animal Nutrition, Beijing Engineering Technology Research Center of Raw Milk Quality and Safety Control, College of Animal Science and Technology, China Agricultural University, Beijing, China
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Hesselmann F, Arnemann D, Bongartz P, Wessling M, Cornelissen C, Schmitz-Rode T, Steinseifer U, Jansen SV, Arens J. Three-dimensional membranes for artificial lungs: Comparison of flow-induced hemolysis. Artif Organs 2021; 46:412-426. [PMID: 34606117 DOI: 10.1111/aor.14081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 08/11/2021] [Accepted: 09/22/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND Membranes based on triply periodic minimal surfaces (TPMS) have proven a superior gas transfer compared to the contemporary hollow fiber membrane (HFM) design in artificial lungs. The improved oxygen transfer is attributed to disrupting the laminar boundary layer adjacent to the membrane surface known as main limiting factor to mass transport. However, it requires experimental proof that this improvement is not at the expense of greater damage to the blood. Hence, the aim of this work is a valid statement regarding the structure-dependent hemolytic behavior of TPMS structures compared to the current HFM design. METHODS Hemolysis tests were performed on structure samples of three different kind of TPMS-based designs (Schwarz-P, Schwarz-D and Schoen's Gyroid) in direct comparison to a hollow fiber structure as reference. RESULTS The results of this study suggest that the difference in hemolysis between TPMS membranes compared to HFMs is small although slightly increased for the TPMS membranes. There is no significant difference between the TPMS structures and the hollow fiber design. Nevertheless, the ratio between the achieved additional oxygen transfer and the additional hemolysis favors the TPMS-based membrane shapes. CONCLUSION TPMS-shaped membranes offer a safe way to improve gas transfer in artificial lungs.
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Affiliation(s)
- Felix Hesselmann
- Department of Cardiovascular Engineering, Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Aachen, Germany
| | - Daniel Arnemann
- Department of Cardiovascular Engineering, Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Aachen, Germany
| | - Patrick Bongartz
- Chair of Chemical Process Engineering, RWTH Aachen University, Aachen, Germany
| | - Matthias Wessling
- Chair of Chemical Process Engineering, RWTH Aachen University, Aachen, Germany.,DWI-Leibniz Institute for Interactive Materials, RWTH Aachen University, Aachen, Germany
| | - Christian Cornelissen
- Department of Pneumology and Internal Intensive Care Medicine, Medical Clinic V, RWTH Aachen University Hospital, Aachen, Germany
| | - Thomas Schmitz-Rode
- Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Aachen, Germany
| | - Ulrich Steinseifer
- Department of Cardiovascular Engineering, Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Aachen, Germany
| | - Sebastian Victor Jansen
- Department of Cardiovascular Engineering, Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Aachen, Germany
| | - Jutta Arens
- Department of Cardiovascular Engineering, Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Aachen, Germany.,Chair of Engineering Organ Support Technologies, Department of Biomechanical Engineering, Faculty of Engineering, Technology University of Twente, Twente, The Netherlands
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Costanzo M, Esposito E, Sguizzato M, Lacavalla MA, Drechsler M, Valacchi G, Zancanaro C, Malatesta M. Formulative Study and Intracellular Fate Evaluation of Ethosomes and Transethosomes for Vitamin D3 Delivery. Int J Mol Sci 2021; 22:5341. [PMID: 34069489 DOI: 10.3390/ijms22105341] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 05/16/2021] [Accepted: 05/17/2021] [Indexed: 02/06/2023] Open
Abstract
In this pilot study, ethosomes and transethosomes were investigated as potential delivery systems for cholecalciferol (vitamin D3), whose deficiency has been correlated to many disorders such as dermatological diseases, systemic infections, cancer and sarcopenia. A formulative study on the influence of pharmaceutically acceptable ionic and non-ionic surfactants allowed the preparation of different transethosomes. In vitro cytotoxicity was evaluated in different cell types representative of epithelial, connective and muscle tissue. Then, the selected nanocarriers were further investigated at light and transmission electron microscopy to evaluate their uptake and intracellular fate. Both ethosomes and transethosomes proven to have physicochemical properties optimal for transdermal penetration and efficient vitamin D3 loading; moreover, nanocarriers were easily internalized by all cell types, although they followed distinct intracellular fates: ethosomes persisted for long times inside the cytoplasm, without inducing subcellular alteration, while transethosomes underwent rapid degradation giving rise to an intracellular accumulation of lipids. These basic results provide a solid scientific background to in vivo investigations aimed at exploring the efficacy of vitamin D3 transdermal administration in different experimental and pathological conditions.
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Torsello G, Müller M, Litterscheid S, Berekoven B, Austermann M, Torsello GF. Fatigue Resistance of the Advanta V12/iCast and Viabahn Balloon-Expandable Stent-Graft as Bridging Stents in Experimental Fenestrated Endografting. J Endovasc Ther 2021; 28:463-468. [PMID: 33629597 DOI: 10.1177/1526602821996724] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
PURPOSE Bridging stents undergo millions of cycles during respiratory movements of the kidneys throughout the patient's life. Thus, understanding the response of fabric and endoskeleton of the stent to cyclic loading over the time is crucial. In this study, we compare the fatigue resistance of the Viabahn Balloon-Expandable stent-graft (VBX) with the widely used Advanta V12/iCast under prolonged stress induction. MATERIALS AND METHODS A polyester test sheet with 10 fenestrations was used simulating a fenestrated endograft. Five 6×59 mm VBX stent-grafts and five 6×58 mm Advanta stent-grafts were implanted into 6×6 mm fenestrations. The stents were flared with a 10×20 mm PTA (percutaneous transluminal angioplasty) catheter and connected with a fatigue stress machine. All stent-grafts were evaluated by microscopy and radiography at baseline and after regular intervals until 50,000,000 cycles were applied, simulating a life span of approximately 75 months. Freedom from fracture (FF), freedom from initial polytertafluoroethylene (PTFE) changes (FIC), and from PTFE breakpoint (FBP, all-layer defect) were calculated. RESULTS Digital radiographic images did not show any stent fracture in both groups after 50,000,000 cycles. The VBX stent-graft was free from any all-layer defects at the conclusion of 50,000,00 cycles resulting in a significant higher FBP compared with Advanta V12 (50,000,000 vs 33,400,000; p<0.01). All-layer defects were observed only in the Advanta group. Two of 5 Advanta stents showed early penetration of the nitinol ring causing a defect of PTFE. Regarding FIC, there was no significant difference between the stents (3,400,000 in VBX vs 3,200,000 in Advanta). CONCLUSIONS In fatigue tests simulating respiration movements, VBX and Advanta V12 performed equally well in terms of fracture resistance and freedom from initial PTFE changes. VBX maintained freedom from PTFE breakpoint throughout the full 50,000,000 cycles. All-layers defects were detected only in Advanta and were mainly caused by penetration of the nitinol ring through the PTFE.
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Affiliation(s)
- Giovanni Torsello
- Institute for Vascular Research, St Franziskus Hospital, Münster, Germany
| | - Marcus Müller
- Biomechanics Laboratory, Department for Hand, Trauma and Reconstructive Surgery, University Hospital, Münster, Germany
| | - Sarah Litterscheid
- Institute for Vascular Research, St Franziskus Hospital, Münster, Germany
| | - Bärbel Berekoven
- Department of Vascular Surgery, St Franziskus Hospital, Münster, Germany
| | - Martin Austermann
- Department of Vascular Surgery, St Franziskus Hospital, Münster, Germany
| | - Giovanni-Federico Torsello
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, Charité Campus Virchow-Klinikum, Charité University Medicine, Berlin, Germany
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Behr-Gross ME, Siklodi B, Le Tallec D, Halder M, Manou I, Sinitskaya N, Bruckner L, Dalmadi B, Kiss L, Redhead K. Collaborative study for the validation of cell line assays for in-process toxicity and antigenicity testing of Clostridium septicum vaccine antigens - Part 2: Optimisation of cell line assays. Pharmeur Bio Sci Notes 2021; 2021:101-156. [PMID: 34078535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
During the production of clostridial vaccines large numbers of mice are used for various in-process control tests. Replacement in vitro assays had been developed for the testing of the toxins and toxoids of several clostridial species, but none of these assays had been assessed in an international collaborative study. Under the common aegis of the European Partnership for Alternative Approaches to Animal Testing (EPAA) and of the European Directorate for the Quality of Medicines & HealthCare (EDQM), a project on clostridial vaccines for veterinary use was started as part of the EDQM-co-ordinated Biological Standardisation Programme (BSP). Within the framework of this project (coded BSP130) a collaborative study was organised to evaluate Vero cell-based alternative methods to the current mouse tests used to measure: i) the toxicity of Clostridium septicum toxin, ii) the absence of toxicity of C. septicum toxoid and iii) the antigenicity of C. septicum toxoid. The principal aims of the study were to determine the repeatability and reproducibility of the in vitro assays and to demonstrate concordance of the in vitro and current in vivo tests. The study results demonstrated good concordance, but the information gathered through the study (later on called Part 1) and the participants' workshop prompted the extension of the project in order to further optimise the in vitro protocols and improve their repeatability and reproducibility, which were comparable to but not better than those of the in vivo assays in Part 1. The 3 in vitro assays to be optimised in the extension of the BSP130 project were : i) the in vitro toxin neutralisation equivalence plus (TNE+), as a replacement for the in vivo minimum lethal dose (MLD) test for quantification of the toxicity of toxin; ii) the in vitro MLD, as a replacement for the in vivo MLD test for detection of residual toxicity associated with toxoid; iii) the in vitro total combining power (TCP), as a replacement for the in vivo TCP test for quantification of the antigenicity of toxoid. At this point, the Analytical Method Transfer Laboratory of Ceva-Phylaxia (Hungary), supported by the project management team, developed suitable SOPs for the 3 in vitro assays. These optimised methods were further assessed in BSP130 through a second international collaborative study (Part 2) aimed at defining repeatability and reproducibility in different laboratories and determining the levels of improvement compared with the original in vivo tests and the initial in vitro assays used in Part 1 of the project. Fourteen laboratories, comprising 4 public sector and 10 manufacturers' medicines control laboratories, from 11 countries participated in the collaborative Part 2 study, each testing 6 different C. septicum toxins and 6 C. septicum toxoids. Improved repeatability and reproducibility were observed for the optimised assays. The results of this study confirm the suitability of these assays for in-process control of C. septicum vaccines, with better repeatability and reproducibility than their in vivo equivalents. It is expected that, with appropriate minor changes and the use of relevant reagents, these optimised in vitro assays could be used not only for the assessment of C. septicum toxins and toxoids but for all cytotoxin-based clostridial antigens. The development and implementation of such in vitro assays would offer a great opportunity to significantly reduce animal usage, shorten the duration of QC test procedures and increase the precision of toxicity and antigenicity assays in clostridial veterinary vaccine in-process control. This would also provide more accurate and reproducible dosing of antigens in the final vaccine products, help to promote compendial acceptance and to proffer a basis for improved international harmonisation across this area of product testing.
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Affiliation(s)
- M-E Behr-Gross
- European Directorate for the Quality of Medicines & HealthCare, Department of Biological Standardisation, OMCL Network & Healthcare (DBO), Council of Europe, Strasbourg, France
| | - B Siklodi
- Ceva-Phylaxia, Veterinary Biologicals Co. Ltd, Hungary
| | - D Le Tallec
- European Directorate for the Quality of Medicines & HealthCare, Department of Biological Standardisation, OMCL Network & HealthCare (DBO), Council of Europe, Strasbourg, France
| | - M Halder
- European Commission, Joint Research Centre, Via E. Fermi, 2749, 21027 Ispra (VA), Italy
| | - I Manou
- European Partnership for Alternative Approaches to Animal Testing (EPAA), Brussels, Belgium
| | - N Sinitskaya
- European Directorate for the Quality of Medicines & HealthCare, Department of Biological Standardisation, OMCL Network & HealthCare (DBO), Council of Europe, Strasbourg, France
| | | | - B Dalmadi
- Ceva-Phylaxia, Veterinary Biologicals Co. Ltd, Hungary
| | - L Kiss
- Ceva-Phylaxia, Veterinary Biologicals Co. Ltd, Hungary
| | - K Redhead
- Vaccine & Assay Consultancy, Watford, WD25 0EX, United Kingdom
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Donno D, Turrini F. Plant Foods and Underutilized Fruits as Source of Functional Food Ingredients: Chemical Composition, Quality Traits, and Biological Properties. Foods 2020; 9:foods9101474. [PMID: 33076549 PMCID: PMC7602697 DOI: 10.3390/foods9101474] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Accepted: 10/13/2020] [Indexed: 11/25/2022] Open
Abstract
Changes in lifestyle and demographics, rising consumer incomes, and shifting preferences due to advanced knowledge about the relationships between food and health contribute to generate new needs in the food supply. Today, the role of food is not only intended as hunger satisfaction and nutrient supply but also as an opportunity to prevent nutrition-related diseases and improve physical and mental well-being. For this reason, there is a growing interest in the novel or less well-known plant foods that offer an opportunity for health maintenance. Recently, interest in plant foods and underutilized fruits is continuously growing, and agrobiodiversity exploitation offers effective and extraordinary potentialities. Plant foods could be an important source of health-promoting compounds and functional food ingredients with beneficial properties: the description of the quality and physicochemical traits, the identification and quantification of bioactive compounds, and the evaluation of their biological activities are important to assess plant food efficacy as functional foods or source of food supplement ingredients.
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Affiliation(s)
- Dario Donno
- Dipartimento di Scienze Agrarie, Forestali e Alimentari, Università degli Studi di Torino, 10095 Grugliasco (TO), Italy
- Correspondence: ; Tel.: +39-011-670-8751
| | - Federica Turrini
- Dipartimento di Farmacia, Università degli Studi di Genova, 16132 Genova, Italy;
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Istrate B, Munteanu C, Lupescu S, Chelariu R, Vlad MD, Vizureanu P. Electrochemical Analysis and In Vitro Assay of Mg-0.5Ca-xY Biodegradable Alloys. Materials (Basel) 2020; 13:ma13143082. [PMID: 32664267 PMCID: PMC7411681 DOI: 10.3390/ma13143082] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Revised: 06/22/2020] [Accepted: 07/04/2020] [Indexed: 11/16/2022]
Abstract
In recent years, biodegradable Mg-based materials have been increasingly studied to be used in the medical industry and beyond. A way to improve biodegradability rate in sync with the healing process of the natural human bone is to alloy Mg with other biocompatible elements. The aim of this research was to improve biodegradability rate and biocompatibility of Mg-0.5Ca alloy through addition of Y in 0.5/1.0/1.5/2.0/3.0wt.%. To characterize the chemical composition and microstructure of experimental Mg alloys, scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), light microscopy (LM), and X-ray diffraction (XRD) were used. The linear polarization resistance (LPR) method was used to calculate corrosion rate as a measure of biodegradability rate. The cytocompatibility was evaluated by MTT assay (3-(4,5-dimethylthiazole-2-yl)-2,5-diphenyltetrazolium bromide) and fluorescence microscopy. Depending on chemical composition, the dendritic α-Mg solid solution, as well as lamellar Mg2Ca and Mg24Y5 intermetallic compounds were found. The lower biodegradability rates were found for Mg-0.5Ca-2.0Y and Mg-0.5Ca-3.0Y which have correlated with values of cell viability. The addition of 2-3 wt.%Y in the Mg-0.5Ca alloy improved both the biodegradability rate and cytocompatibility behavior.
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Affiliation(s)
- Bogdan Istrate
- Mechanical Engineering Department, Gheorghe Asachi University of Iasi, 6 D. Mangeron Blvd, 700050 Iasi, Romania;
| | - Corneliu Munteanu
- Mechanical Engineering Department, Gheorghe Asachi University of Iasi, 6 D. Mangeron Blvd, 700050 Iasi, Romania;
- Correspondence: (C.M.); (S.L.); Tel.: +40-744-647-991 (C.M.); +40-753-867-926 (S.L.)
| | - Stefan Lupescu
- Mechanical Engineering Department, Gheorghe Asachi University of Iasi, 6 D. Mangeron Blvd, 700050 Iasi, Romania;
- Correspondence: (C.M.); (S.L.); Tel.: +40-744-647-991 (C.M.); +40-753-867-926 (S.L.)
| | - Romeu Chelariu
- Faculty of Material Science and Engineering Department, Gheorghe Asachi University of Iasi, 41 DimitrieMangeron str., 700050 Iasi, Romania; (R.C.); (P.V.)
| | - Maria Daniela Vlad
- Faculty of Medical Bioengineering, “Grigore T. Popa” University of Medicine and Pharmacy from Iasi, 9-13 Kogălniceanu Str, 700454 Iasi, Romania;
| | - Petrică Vizureanu
- Faculty of Material Science and Engineering Department, Gheorghe Asachi University of Iasi, 41 DimitrieMangeron str., 700050 Iasi, Romania; (R.C.); (P.V.)
- Romanian Inventors Forum, Sf. P. Movila 3, 700089 Iasi, Romania
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Subin Lee, Ketan R. Bulsara. Assessing the Efficacy of Commercially Available Filters in Removing Air Micro-Emboli in Intravenous Infusion Systems. J Extra Corpor Technol 2020; 52. [PMID: 32669738 DOI: 10.1182/ject-1900037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Accepted: 02/11/2020] [Indexed: 12/13/2022]
Abstract
The presence of gaseous air emboli in the vasculature has the potential to cause significant morbidity and mortality. Once viewed as a rare complication of high-risk surgeries, air embolism is now also being associated with even minor and routine procedures such as peripheral venous catheterization. With increasing recognition, various preventive measures have emerged, the most important of which is the use of air-eliminating filters. However, studies on these devices are currently lacking. Therefore, in this present study, we aimed to evaluate the effectiveness of two commercially available filters in removing air within intravenous (IV) lines. An IV infusion system was created, designed to resemble standard conditions used in real clinical practice. Testing was completed using a .9% NaCl solution at room temperature with a flow rate set at 75 mL/h and involving three different filter orientations. The test bed was configured to inject air every 2 minutes with volumes ranging between 5 and 600 μL. The two filter models tested were GVS .2-μM and Braun SUPOR membrane air-eliminating filters. Data was collected at pre-filter and post-filter sites. The Braun SUPOR membrane filter (B Braun, Bethlehem, PA) reduced air micro-emboli by 100.0% (p < .0001) both by volume and count compared with -.6 ± 3.5% by volume and -.8 ± 1.5% by count for the control. The reduction seen with the GVS .2-μM filter was 99.8 ± .2% (p < .0001) by volume and 86.2 ± 21.1% (p < .0001) by count compared with the control. There was no statistically significant difference in the removal efficacy between the two filter models. As the use of air-eliminating filters becomes a common standard of care, establishing the validity of the commercially available filter models is important to minimize the risk of vascular air embolism.
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Al Khoury C, Nemer N, Nemer G, Kurban M, Bernigaud C, Fischer K, Guillot J. In Vitro Activity of Beauvericin against All Developmental Stages of Sarcoptes scabiei. Antimicrob Agents Chemother 2020; 64:e02118-19. [PMID: 32122897 DOI: 10.1128/AAC.02118-19] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Accepted: 02/23/2020] [Indexed: 12/22/2022] Open
Abstract
Scabies is a frequent cutaneous infection caused by the mite Sarcoptes scabiei in a large number of mammals, including humans. As the resistance of S. scabiei against several chemical acaricides has been previously documented, the establishment of alternative and effective control molecules is required. In this study, the potential acaricidal activity of beauvericin was assessed against different life stages of S. scabiei var. suis and in comparison with dimpylate and ivermectin, two commercially available molecules used for the treatment of S. scabiei infection in animals and/or humans. The toxicity of beauvericin against cultured human fibroblast skin cells was evaluated using an MTT proliferation assay. In our in vitro model, developmental stages of S. scabiei were placed in petri dishes filled with Columbia agar supplemented with pig serum and different concentrations of the drugs. Cell sensitivity assays demonstrated low toxicity of beauvericin against primary human fibroblast skin cells. At 0.5 and 5 mM, beauvericin showed higher activity against adults and eggs of S. scabiei compared to dimpylate and ivermectin. These results revealed that the use of beauvericin is promising and might be considered for the treatment of S. scabiei infection.
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Tedesco P, Beraldo P, Massimo M, Fioravanti ML, Volpatti D, Dirks R, Galuppi R. Comparative Therapeutic Effects of Natural Compounds Against Saprolegnia spp. (Oomycota) and Amyloodinium ocellatum (Dinophyceae). Front Vet Sci 2020; 7:83. [PMID: 32154278 PMCID: PMC7047137 DOI: 10.3389/fvets.2020.00083] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 02/03/2020] [Indexed: 11/13/2022] Open
Abstract
The fish parasites Saprolegnia spp. (Oomycota) and Amyloodinium ocellatum (Dinophyceae) cause important losses in freshwater and marine aquaculture industry, respectively. The possible adverse effects of compounds used to control these parasites in aquaculture resulted in increased interest on the search for natural products with antiparasitic activity. In this work, eighteen plant-derived compounds (2′,4′-Dihydroxychalcone; 7-Hydroxyflavone; Artemisinin; Camphor (1R); Diallyl sulfide; Esculetin; Eucalyptol; Garlicin 80%; Harmalol hydrochloride dihydrate; Palmatine chloride; Piperine; Plumbagin; Resveratrol; Rosmarinic acid; Sclareolide; Tomatine, Umbelliferone, and Usnic Acid) have been tested in vitro. Sixteen of these were used to determine their effects on the gill cell line G1B (ATCC®CRL-2536™) and on the motility of viable dinospores of Amyloodinium ocellatum, and thirteen were screened for inhibitory activity against Saprolegnia spp. The cytotoxicity results on G1B cells determined that only two compounds (2′,4′-Dihydroxychalcone and Tomatine) exhibited dose-dependent toxic effects. The highest surveyed concentrations (0.1 and 0.01 mM) reduced cell viability by 80%. Upon lowering the compound concentration the percentage of dead cells was lower than 20%. The same two compounds revealed to be potential antiparasitics by reducing in a dose-dependent manner the motility of A. ocellatum dinospores up to 100%. With respect to Saprolegnia, a Minimum Inhibitory Concentration was found for Tomatine (0.1 mM), Piperine and Plumbagin (0.25 mM), while 2′,4′-Dihydroxychalcone considerably slowed down mycelial growth for 24 h at a concentration of 0.1 mM. Therefore, this research allowed to identify two compounds, Tomatine and 2′,4′-Dihydroxychalcone, effective against both parasites. These compounds could represent promising candidates for the treatment of amyloodiniosis and saprolegniosis in aquaculture. Nevertheless, further in vitro and in vivo tests are required in order to determine concentrations that are effective against the considered pathogens but at the same time safe for hosts, environment and consumers.
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Affiliation(s)
- Perla Tedesco
- Department of Veterinary Medical Sciences, Alma Mater Studiorum-University of Bologna, Bologna, Italy
| | - Paola Beraldo
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Udine, Italy
| | - Michela Massimo
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Udine, Italy
| | - Maria Letizia Fioravanti
- Department of Veterinary Medical Sciences, Alma Mater Studiorum-University of Bologna, Bologna, Italy
| | - Donatella Volpatti
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Udine, Italy
| | - Ron Dirks
- Future Genomics Technologies BV, Leiden, Netherlands
| | - Roberta Galuppi
- Department of Veterinary Medical Sciences, Alma Mater Studiorum-University of Bologna, Bologna, Italy
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Horkavcová D, Rohanová D, Stříbny A, Schuhladen K, Boccaccini AR, Bezdička P. Interaction of MOPS buffer with glass-ceramic scaffold: Effect of (PO 4 ) 3- ions in SBF on kinetics and morphology of formatted hydroxyapatite. J Biomed Mater Res B Appl Biomater 2019; 108:1888-1896. [PMID: 31840940 PMCID: PMC7217194 DOI: 10.1002/jbm.b.34530] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 11/12/2019] [Accepted: 11/16/2019] [Indexed: 11/09/2022]
Abstract
The international standard ISO 23317:2014 for the in vitro testing of inorganic biomaterials in simulated body fluid (SBF) uses TRIS buffer to maintain neutral pH. In our previous papers, we investigated the interaction of a glass–ceramic scaffold with TRIS and HEPES buffers. Both of them speeded up glass–ceramic dissolution and hydroxyapatite (HAp) precipitation, thereby demonstrating their unsuitability for the in vitro testing of highly reactive biomaterials. In this article, we tested MOPS buffer (3‐[N‐morpholino] propanesulfonic acid), another amino acid from the group of “Goods buffers”. A highly reactive glass–ceramic scaffold (derived from Bioglass®) was exposed to SBF under static–dynamic conditions for 13/15 days. The kinetics and morphology of the newly precipitated HAp were studied using two different concentrations of (PO4)3− ions in SBF. The pH value and the SiIV, Ca2+, and (PO4)3− concentrations in the SBF leachate samples were measured every day (AAS, spectrophotometry). The glass–ceramic scaffold was monitored by SEM/EDS, XRD, WD‐XRF, and BET before and after 1, 3, 7, 11, and 13/15 days of exposure. As in the case of TRIS and HEPES, the preferential dissolution of the glass–ceramic crystalline phase (Combeite) was observed, but less intensively. The lower concentration of (PO4)3− ions slowed down the kinetics of HAp precipitation, thereby causing the disintegration of the scaffold structure. This phenomenon shows that the HAp phase was predominately generated by the presence of (PO4)3− ions in the SBF, not in the glass–ceramic material. Irrespective of this, MOPS buffer is not suitable for the maintenance of pH in SBF.
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Affiliation(s)
- Diana Horkavcová
- Department of Glass and Ceramics, Faculty of Chemical Technology, University of Chemistry and Technology Prague, Prague, Czech Republic
| | - Dana Rohanová
- Department of Glass and Ceramics, Faculty of Chemical Technology, University of Chemistry and Technology Prague, Prague, Czech Republic
| | - Adam Stříbny
- Department of Glass and Ceramics, Faculty of Chemical Technology, University of Chemistry and Technology Prague, Prague, Czech Republic
| | - Katharina Schuhladen
- Department of Materials Science and Engineering, Institute of Biomaterials, University of Erlangen-Nuremberg, Erlangen, Germany
| | - Aldo Roberto Boccaccini
- Department of Materials Science and Engineering, Institute of Biomaterials, University of Erlangen-Nuremberg, Erlangen, Germany
| | - Petr Bezdička
- Institute of Inorganic Chemistry of the ASCR, v.v.i, Husinec-Řež, Czech Republic
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Barbero N, Fernández‐Santamaría R, Mayorga C, Martin‐Serrano Á, Salas M, Bogas G, Nájera F, Pérez‐Sala D, Pérez‐Inestrosa E, Fernandez TD, Montañez MI, Torres MJ. Identification of an antigenic determinant of clavulanic acid responsible for IgE-mediated reactions. Allergy 2019; 74:1490-1501. [PMID: 30829415 DOI: 10.1111/all.13761] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 01/23/2019] [Accepted: 02/18/2019] [Indexed: 12/25/2022]
Abstract
BACKGROUND Selective reactions to clavulanic acid (CLV) account for around 30% of immediate reactions after administration of amoxicillin-CLV. Currently, no immunoassay is available for detecting specific IgE to CLV, and its specific recognition in patients with immediate reactions has only been demonstrated by basophil activation testing, however with suboptimal sensitivity. The lack of knowledge regarding the structure of the drug that remains bound to proteins (antigenic determinant) is hampering the development of in vitro diagnostics. We aimed to identify the antigenic determinants of CLV as well as to evaluate their specific IgE recognition and potential role for diagnosis. METHODS Based on complex CLV degradation mechanisms, we hypothesized the formation of two antigenic determinants for CLV, AD-I (N-protein, 3-oxopropanamide) and AD-II (N-protein, 3-aminopropanamide), and designed different synthetic analogs to each one. IgE recognition of these structures was evaluated in basophils from patients with selective reactions to CLV and tolerant subjects. In parallel, the CLV fragments bound to proteins were identified by proteomic approaches. RESULTS Two synthetic analogs of AD-I were found to activate basophils from allergic patients. This determinant was also detected bound to lysines 195 and 475 of CLV-treated human serum albumin. One of these analogs was able to activate basophils in 59% of patients whereas CLV only in 41%. Combining both results led to an increase in basophil activation in 69% of patients, and only in 12% of controls. CONCLUSION We have identified AD-I as one CLV antigenic determinant, which is the drug fragment that remains protein-bound.
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Affiliation(s)
- Nekane Barbero
- Andalusian Center for Nanomedicine and Biotechnology – BIONANDMálaga Spain
- Department of Organic Chemistry IBIMAUniversity of Málaga Málaga Spain
| | | | - Cristobalina Mayorga
- Andalusian Center for Nanomedicine and Biotechnology – BIONANDMálaga Spain
- Allergy Research GroupInstituto de Investigacion Biomédica de Malaga‐IBIMA Málaga Spain
- Allergy UnitHospital Regional Universitario de Malaga Málaga Spain
| | - Ángela Martin‐Serrano
- Andalusian Center for Nanomedicine and Biotechnology – BIONANDMálaga Spain
- Allergy Research GroupInstituto de Investigacion Biomédica de Malaga‐IBIMA Málaga Spain
| | - María Salas
- Allergy Research GroupInstituto de Investigacion Biomédica de Malaga‐IBIMA Málaga Spain
- Allergy UnitHospital Regional Universitario de Malaga Málaga Spain
| | - Gador Bogas
- Allergy Research GroupInstituto de Investigacion Biomédica de Malaga‐IBIMA Málaga Spain
- Allergy UnitHospital Regional Universitario de Malaga Málaga Spain
| | - Francisco Nájera
- Andalusian Center for Nanomedicine and Biotechnology – BIONANDMálaga Spain
- Department of Organic Chemistry IBIMAUniversity of Málaga Málaga Spain
| | | | - Ezequiel Pérez‐Inestrosa
- Andalusian Center for Nanomedicine and Biotechnology – BIONANDMálaga Spain
- Department of Organic Chemistry IBIMAUniversity of Málaga Málaga Spain
| | - Tahia D. Fernandez
- Allergy Research GroupInstituto de Investigacion Biomédica de Malaga‐IBIMA Málaga Spain
| | - María I. Montañez
- Andalusian Center for Nanomedicine and Biotechnology – BIONANDMálaga Spain
- Allergy Research GroupInstituto de Investigacion Biomédica de Malaga‐IBIMA Málaga Spain
| | - María J. Torres
- Andalusian Center for Nanomedicine and Biotechnology – BIONANDMálaga Spain
- Allergy Research GroupInstituto de Investigacion Biomédica de Malaga‐IBIMA Málaga Spain
- Allergy UnitHospital Regional Universitario de Malaga Málaga Spain
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Tedesco P, Fioravanti ML, Galuppi R. In vitro activity of chemicals and commercial products against Saprolegnia parasitica and Saprolegnia delica strains. J Fish Dis 2019; 42:237-248. [PMID: 30536642 PMCID: PMC7379612 DOI: 10.1111/jfd.12923] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 10/01/2018] [Accepted: 10/04/2018] [Indexed: 06/09/2023]
Abstract
Oomycetes of the genus Saprolegnia are responsible for severe economic losses in freshwater aquaculture. Following the ban of malachite green in food fish production, the demand for new treatments pushes towards the selection of more safe and environment-friendly products. In the present work, in vitro activity of ten chemicals and three commercial products was tested on different strains of Saprolegnia, using malachite green as reference compound. The compounds were screened in agar and in water to assess the minimum inhibitory concentration (MIC) and the minimum lethal concentration (MLC), respectively. Two strains of Saprolegnia parasitica and one isolate of Saprolegnia delica were tested in triplicate per each concentration. Among tested chemicals, benzoic acid showed the lowest MIC (100 ppm) followed by acetic acid, iodoacetic acid and copper sulphate (250 ppm). Sodium percarbonate was not effective at any tested concentration. Among commercial products, Virkon™ S was effective in inhibiting the growth of the mycelium (MIC = MLC = 1,000 ppm). Actidrox® and Detarox® AP showed MIC = 5,000 and 1,000 ppm, respectively, while MLCs were 10-fold lower than MICs, possibly due to a higher activity of these products in water. Similarly, a higher effectiveness in water was observed also for iodoacetic acid.
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Affiliation(s)
- Perla Tedesco
- Department of Veterinary Medical SciencesAlma Mater Studiorum University of BolognaOzzano Emilia (BO)Italy
| | - Maria Letizia Fioravanti
- Department of Veterinary Medical SciencesAlma Mater Studiorum University of BolognaOzzano Emilia (BO)Italy
| | - Roberta Galuppi
- Department of Veterinary Medical SciencesAlma Mater Studiorum University of BolognaOzzano Emilia (BO)Italy
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Kahraman EN, Saçan MT. On the prediction of cytotoxicity of diverse chemicals for topminnow (Poeciliopsis lucida) hepatoma cell line, PLHC-1 $. SAR QSAR Environ Res 2018; 29:675-691. [PMID: 30220216 DOI: 10.1080/1062936x.2018.1509235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Indexed: 06/08/2023]
Abstract
Two data sets on the cytotoxicity of diverse chemicals to topminnow (Poeciliopsis lucida) hepatoma cell line (PLHC-1) were modelled with quantitative structure-toxicity relationship (QSTR). The data sets are based on 3-amino-7-dimethylamino-2-methylphenazine hydrochloride (NR) and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assays representing lysosomal damage and metabolic impairment, respectively. The descriptors were calculated with DRAGON 6 and SPARTAN 10 software packages. Descriptor selection was made by 'all subset' and genetic algorithm-based features implemented in QSARINS software. The proposed QSTR models were validated both internally and externally. For both endpoints, statistically satisfactory QSTR models were generated with nTr = 39; r2Tr = 0.782; RMSETr = 0.466; nTest = 18; r2Test = 0.799; RMSETest = 0.360 for NR-based model and nTr = 32; r2Tr = 0.775; RMSETr = 0.460; nTest = 10; r2Test = 0.864; RMSETest = 0.290 for MTT-based model. Additionally, the QSTR models generated for NR and MTT endpoints were used to predict the cytotoxicity of an external set of 657 and 652 diverse chemicals with structural coverage of 98.6% and 98.3%, respectively. A moderate correlation was observed between the experimental in vivo and predicted in vitro values for external set chemicals. The QSTR models may provide an initial, rapid screening and prioritization of these diverse chemicals for the acute fish toxicity assessment and reduce the need for extensive in vivo toxicity testing.
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Affiliation(s)
- E Nagihan Kahraman
- a Ecotoxicology and Chemometrics Laboratory , Institute of Environmental Sciences, Bogazici University , Besiktas / Istanbul , Turkey
| | - M Türker Saçan
- a Ecotoxicology and Chemometrics Laboratory , Institute of Environmental Sciences, Bogazici University , Besiktas / Istanbul , Turkey
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Abstract
Airbags are safety devices in vehicles effectively suppressing passengers' injuries during accidents. Although there are still many cases of eye injuries reported due to eye-airbag impacts in recent years. Biomechanical approaches are now feasible and can considerably help experts to investigate the issue without ethical concerns. The eye-airbag impact-induced stresses/strains in various components of the eye were found to investigate the risk of injury in different conditions (impact velocity and airbag pressure). Three-dimensional geometry of the eyeball, fat and bony socket as well as the airbag were developed and meshed to develop a finite element model. Nonlinear material properties of the vitreous body and sclera were found through the in vitro tests on ovine samples and for the other components were taken from the literature. The eye collided the airbag due to the velocity field in the dynamic explicit step in Abaqus. Results of compression tests showed a nonlinear curve for vitreous body with average ultimate stress of 22 (18-25) kPa. Tensile behavior of sclera was viscoelastic nonlinear with ultimate stresses changing from 2.51 (2.3-2.7) to 4.3 (4-4.6) MPa when loading strain rate increased from 10 to 600 mm/min. Sclera, ciliary body, cornea and lens were the eye components with highest stresses (maximum stress reached up to 9.3 MPa). Cornea, retina and choroid experienced the highest strains with the maximum up to 14.1%. According to the previously reported injury criteria for cornea, it was at high risk of injury considering both stress and strains. Reduced pressure of the airbag was beneficial decreased stress of all components. Comprehensive investigations in this area can disclose biomechanical behavior of the eye during eye-airbag impact. Effective guidelines can be drawn for airbag design for instance the airbag pressure which reduces risk of eye injury.
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Affiliation(s)
- Hooman Shirzadi
- 1 Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran
| | - Hassan Zohoor
- 2 Center of Excellence in Design, Robotics and Automation, Sharif University of Technology, Academician, Academy of Sciences of IR Iran
| | - Sadegh Naserkhaki
- 3 Department of Biomedical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
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Knigge SR, Glasmacher B. Comparison between three in vitro methods to measure magnesium degradation and their suitability for predicting in vivo degradation. Int J Artif Organs 2018; 41:772-778. [PMID: 29756538 DOI: 10.1177/0391398818772777] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A lot of research has been done in the field of magnesium-based implant material. This study is focused on finding an explanation for the large disparity in results from similar experiments in literature. The hypothesis is that many different measurement protocols are used to quantify magnesium degradation and this leads to inconsistent results. Cylindrical, pure magnesium samples were used for this study. The degradation took place in revised simulated body fluid at 37°C. Hydrogen evolution was measured to quantify the degradation. Two commonly used experimental protocols were examined: static conditions and a fluid changing method. For static testing, the samples stayed in fluid. For the fluid changing method, the fluid was changed after 2 and 5 days of immersion. In addition, a new method with continuous fluid flow was established. After an initial phase, the results confirm that for all three methods, the degradation behavior differs strongly. The static condition results in a very slow degradation rate. The fluid change method leads to a similar behavior like the static condition except that the degradation was speeded up after the fluid changes. The continuous degradation is linear for a long period after the initial phase. In comparison with in vivo degradation behavior, the degradation process in continuous flow shows the best fitting. The accumulation of degradation products, especially the increasing pH value, has a strong inhibiting effect. This cannot be observed in vivo so that a constant experimental environment realizable by continuous flow is more suitable for magnesium-based implant material testing.
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Affiliation(s)
- Sara R Knigge
- Institut für Mehrphasenprozesse, Leibniz Universität Hannover, Hannover, Germany
| | - Birgit Glasmacher
- Institut für Mehrphasenprozesse, Leibniz Universität Hannover, Hannover, Germany
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Yang K, Zhang T, Shao Y, Tian C, Cattle SR, Zhu Y, Song J. Fractionation, Bioaccessibility, and Risk Assessment of Heavy Metals in the Soil of an Urban Recreational Area Amended with Composted Sewage Sludge. Int J Environ Res Public Health 2018; 15:ijerph15040613. [PMID: 29597244 PMCID: PMC5923655 DOI: 10.3390/ijerph15040613] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 03/20/2018] [Accepted: 03/21/2018] [Indexed: 11/16/2022]
Abstract
A composted sewage sludge (CSS) was added to the soil of an urban garden at 5%, 10%, and 25% (w/w soil) and stabilised for 180 days. Samples were then collected and analysed for total heavy metal concentrations, chemical fractions, and bioaccessibility, together with some physicochemical properties. The results showed that the total chromium (Cr), copper (Cu), lead (Pb), and zinc (Zn) concentrations were increased with CSS addition rate. The CSS addition decreased the residual fractions of these four elements. The exchangeable Cr, Cu, and Pb fractions were very small or not detected, while Zn exhibited an increasing trend in its exchangeable fraction with CSS addition rate. The bioaccessibility of these four elements was increased with the CSS addition rate. Moreover, the Cr, Cu, and Zn bioaccessibility correlated positively with the total concentration, while the bioaccessibility of these four elements exhibited a negative correlation with the residual fraction. The fractionation and bioaccessibility of heavy metals may have also been influenced by pH, cation exchange capacity, and organic matter. The risk assessment code reflected the amended soil showed no or low environmental risks for Cr, Cu, and Pb and a medium risk for Zn. The hazardous index values and cancer risk levels indicated that the heavy metals in the soil amended with 25% CSS posed negligible potential noncarcinogenic and carcinogenic risks to children and adults via incidental ingestion.
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Affiliation(s)
- Kai Yang
- Advanced Materials Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China.
| | - Tao Zhang
- Advanced Materials Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China.
- College of Environmental Science and Engineering, Taiyuan University of Technology, Jinzhong 030600, China.
| | - Yanqiu Shao
- Advanced Materials Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China.
| | - Chao Tian
- Advanced Materials Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China.
| | - Stephen R Cattle
- Sydney Institute of Agriculture, School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, Eveleigh, NSW 2015, Australia.
| | - Ying Zhu
- Advanced Materials Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China.
| | - Jinjuan Song
- Quality, Safety and Environmental Protection Department, China International Water and Electric Corporation, Beijing 100120, China.
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Doña I, Torres MJ, Montañez MI, Fernández TD. In Vitro Diagnostic Testing for Antibiotic Allergy. Allergy Asthma Immunol Res 2017; 9:288-298. [PMID: 28497915 PMCID: PMC5446943 DOI: 10.4168/aair.2017.9.4.288] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 01/18/2017] [Accepted: 02/05/2017] [Indexed: 12/21/2022]
Abstract
Allergy to antibiotics is an important worldwide problem, with an estimated prevalence of up to 10% of the population. Reaction patterns for different antibiotics have changed in accordance with consumption trends. Most of the allergic reactions to antibiotics have been reported for betalactams, followed by quinolones and macrolides and, to a lesser extent, to others, such as metronidazole clindamycin and sulfonamides. The diagnostic procedure includes a detailed clinical history, which is not always possible and can be unreliable. This is usually followed by in vivo, skin, and drug provocation tests. These are not recommended for severe, potentially lifethreaten reactions or for drugs that are known to produce a high rate of false positive results. Given the limitations of in vivo tests, in vitro test can be helpful for diagnosis, despite having suboptimal sensitivity. The most highly employed techniques for diagnosing immediate reactions to antibiotics are immunoassays and basophil activation tests, while lymphocyte transformation tests are more commonly used to diagnose non-immediate reactions. In this review, we describe different in vitro techniques employed to diagnose antibiotic allergy.
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Affiliation(s)
- Inmaculada Doña
- Allergy Unit, IBIMA-Regional University Hospital of Malaga-UMA, Málaga, Spain
| | - Maria J Torres
- Allergy Unit, IBIMA-Regional University Hospital of Malaga-UMA, Málaga, Spain.
- Andalusian Center for Nanomedicine and Biotechnology-BIONAND, Málaga, Spain
| | - Maria I Montañez
- Andalusian Center for Nanomedicine and Biotechnology-BIONAND, Málaga, Spain
- Research Laboratory, IBIMA-Regional University Hospital of Malaga-UMA, Málaga, Spain
| | - Tahia D Fernández
- Research Laboratory, IBIMA-Regional University Hospital of Malaga-UMA, Málaga, Spain
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Affiliation(s)
- Christopher Hernandez
- Department of Radiology, Case Western Reserve University, 10900 Euclid Ave, Cleveland, OH 44106, USA
| | - Agata A Exner
- Department of Radiology, Case Western Reserve University, 10900 Euclid Ave, Cleveland, OH 44106, USA
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Bruenke J, Roschke I, Agarwal S, Riemann T, Greiner A. Quantitative Comparison of the Antimicrobial Efficiency of Leaching versus Nonleaching Polymer Materials. Macromol Biosci 2016; 16:647-54. [PMID: 26806336 DOI: 10.1002/mabi.201500266] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 10/08/2015] [Indexed: 11/08/2022]
Abstract
New antimicrobial materials will be more and more in the focus for hygienic and clinical disease control. Antimicrobial materials have to be distinguished in leaching and nonleaching materials. For many applications of antimicrobial materials on implants the use of nonleaching materials is essential. Therefore, the antimicrobial efficiency of leaching and nonleaching polymers has been investigated quantitatively in vitro in direct comparison on a highly relevant implant of central venous catheters (CVCs) using a well-established called Certika test. This test is especially designed to test antimicrobial properties of leachable and nonleachable materials. This contribution demonstrates that newly developed nonleaching antimicrobial CVCs are equivalent to conventional leaching CVC systems in their antimicrobial performance against gram-positive and gram-negative bacteria, as well as Candida species. The use of new nonleaching antimicrobial polymers as shown here for CVCs represents a different mode of action with the aim to prevent infections also with antibiotic-resistant strains and reduced side effects.
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Affiliation(s)
- Joerg Bruenke
- QualityLabs BT GmbH, Neumeyerstr. 46 a, 90411, Nuremberg, Germany
| | - Ingolf Roschke
- Medical Marketing GmbH, Gleueler Straße 237, 50935, Cologne, Germany
| | - Seema Agarwal
- Chair of Macromolecular Chemistry II, University of Bayreuth, Universitätsstrasse 30, 95440, Bayreuth, Germany
| | - Thomas Riemann
- B. Braun Melsungen AG, Carl-Braun-Straße 1, 34212, Melsungen, Germany
| | - Andreas Greiner
- Chair of Macromolecular Chemistry II, University of Bayreuth, Universitätsstrasse 30, 95440, Bayreuth, Germany
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Stevenson G, Rehman S, Draper E, Hernández-Nava E, Hunt J, Haycock JW. Combining 3D human in vitro methods for a 3Rs evaluation of novel titanium surfaces in orthopaedic applications. Biotechnol Bioeng 2016; 113:1586-99. [PMID: 26702609 PMCID: PMC4982034 DOI: 10.1002/bit.25919] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 12/21/2015] [Accepted: 12/22/2015] [Indexed: 11/06/2022]
Abstract
In this study, we report on a group of complementary human osteoblast in vitro test methods for the preclinical evaluation of 3D porous titanium surfaces. The surfaces were prepared by additive manufacturing (electron beam melting [EBM]) and plasma spraying, allowing the creation of complex lattice surface geometries. Physical properties of the surfaces were characterized by SEM and profilometry and 3D in vitro cell culture using human osteoblasts. Primary human osteoblast cells were found to elicit greater differences between titanium sample surfaces than an MG63 osteoblast-like cell line, particularly in terms of cell survival. Surface morphology was associated with higher osteoblast metabolic activity and mineralization on rougher titanium plasma spray coated surfaces than smoother surfaces. Differences in osteoblast survival and metabolic activity on titanium lattice structures were also found, despite analogous surface morphology at the cellular level. 3D confocal microscopy identified osteoblast organization within complex titanium surface geometries, adhesion, spreading, and alignment to the biomaterial strut geometries. Mineralized nodule formation throughout the lattice structures was also observed, and indicative of early markers of bone in-growth on such materials. Testing methods such as those presented are not traditionally considered by medical device manufacturers, but we suggest have value as an increasingly vital tool in efficiently translating pre-clinical studies, especially in balance with current regulatory practice, commercial demands, the 3Rs, and the relative merits of in vitro and in vivo studies. Biotechnol. Bioeng. 2016;113: 1586-1599. © 2015 The Authors. Biotechnology and Bioengineering Published by Wiley Periodicals, Inc.
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Affiliation(s)
- G Stevenson
- JRI Orthopaedics Ltd., Sheffield, United Kingdom
| | - S Rehman
- JRI Orthopaedics Ltd., Sheffield, United Kingdom
| | - E Draper
- JRI Orthopaedics Ltd., Sheffield, United Kingdom
| | - E Hernández-Nava
- Mercury Centre, University of Sheffield, Sheffield, United Kingdom
| | - J Hunt
- Mercury Centre, University of Sheffield, Sheffield, United Kingdom
| | - J W Haycock
- Department of Materials Science and Engineering, University of Sheffield, Sheffield, S3 7HQ, United Kingdom.
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Mollet BB, Bogaerts ILJ, van Almen GC, Dankers PYW. A bioartificial environment for kidney epithelial cells based on a supramolecular polymer basement membrane mimic and an organotypical culture system. J Tissue Eng Regen Med 2015; 11:1820-1834. [PMID: 28586546 DOI: 10.1002/term.2080] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2014] [Revised: 05/18/2015] [Accepted: 06/23/2015] [Indexed: 01/27/2023]
Abstract
Renal applications in healthcare, such as renal replacement therapies and nephrotoxicity tests, could potentially benefit from bioartificial kidney membranes with fully differentiated and functional human tubular epithelial cells. A replacement of the natural environment of these cells is required to maintain and study cell functionality cell differentiation in vitro. Our approach was based on synthetic supramolecular biomaterials to mimic the natural basement membrane (BM) on which these cells grow and a bioreactor to provide the desired organotypical culture parameters. The BM mimics were constructed from ureidopyrimidinone (UPy)-functionalized polymer and bioactive peptides by electrospinning. The resultant membranes were shown to have a hierarchical fibrous BM-like structure consisting of self-assembled nanofibres within the electrospun microfibres. Human kidney-2 (HK-2) epithelial cells were cultured on the BM mimics under organotypical conditions in a custom-built bioreactor. The bioreactor facilitated in situ monitoring and functionality testing of the cultures. Cell viability and the integrity of the epithelial cell barrier were demonstrated inside the bioreactor by microscopy and transmembrane leakage of fluorescently labelled inulin, respectively. Furthermore, HK-2 cells maintained a polarized cell layer and showed modulation of both gene expression of membrane transporter proteins and metabolic activity of brush border enzymes when subjected to a continuous flow of culture medium inside the new bioreactor for 21 days. These results demonstrated that both the culture and study of renal epithelial cells was facilitated by the bioartificial in vitro environment that is formed by synthetic supramolecular BM mimics in our custom-built bioreactor. Copyright © 2015 John Wiley & Sons, Ltd.
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Affiliation(s)
- Björne B Mollet
- Department of Biomedical Engineering, Laboratory of Chemical Biology, Eindhoven University of Technology, The Netherlands.,Institute for Complex Molecular Systems, Eindhoven University of Technology, The Netherlands
| | - Iven L J Bogaerts
- Department of Biomedical Engineering, Laboratory of Chemical Biology, Eindhoven University of Technology, The Netherlands.,Institute for Complex Molecular Systems, Eindhoven University of Technology, The Netherlands
| | - Geert C van Almen
- Department of Biomedical Engineering, Laboratory of Chemical Biology, Eindhoven University of Technology, The Netherlands.,Institute for Complex Molecular Systems, Eindhoven University of Technology, The Netherlands
| | - Patricia Y W Dankers
- Department of Biomedical Engineering, Laboratory of Chemical Biology, Eindhoven University of Technology, The Netherlands.,Institute for Complex Molecular Systems, Eindhoven University of Technology, The Netherlands
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Brockow K, Przybilla B, Aberer W, Bircher AJ, Brehler R, Dickel H, Fuchs T, Jakob T, Lange L, Pfützner W, Mockenhaupt M, Ott H, Pfaar O, Ring J, Sachs B, Sitter H, Trautmann A, Treudler R, Wedi B, Worm M, Wurpts G, Zuberbier T, Merk HF. Guideline for the diagnosis of drug hypersensitivity reactions: S2K-Guideline of the German Society for Allergology and Clinical Immunology (DGAKI) and the German Dermatological Society (DDG) in collaboration with the Association of German Allergologists (AeDA), the German Society for Pediatric Allergology and Environmental Medicine (GPA), the German Contact Dermatitis Research Group (DKG), the Swiss Society for Allergy and Immunology (SGAI), the Austrian Society for Allergology and Immunology (ÖGAI), the German Academy of Allergology and Environmental Medicine (DAAU), the German Center for Documentation of Severe Skin Reactions and the German Federal Institute for Drugs and Medical Products (BfArM). ACTA ACUST UNITED AC 2015; 24:94-105. [PMID: 26120552 PMCID: PMC4479479 DOI: 10.1007/s40629-015-0052-6] [Citation(s) in RCA: 115] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Drug hypersensitivity reactions are unpredictable adverse drug reactions. They manifest either within 1–6 h following drug intake (immediate reactions) with mild to life-threatening symptoms of anaphylaxis, or several hours to days later (delayed reactions), primarily as exanthematous eruptions. It is not always possible to detect involvement of the immune system (allergy). Waiving diagnostic tests can result in severe reactions on renewed exposure on the one hand, and to unjustified treatment restrictions on the other. With this guideline, experts from various specialist societies and institutions have formulated recommendations and an algorithm for the diagnosis of allergies. The key principles of diagnosing allergic/hypersensitivity drug reactions are presented. Where possible, the objective is to perform allergy diagnostics within 4 weeks–6 months following the reaction. A clinical classification of symptoms based on the morphology and time course of the reaction is required in order to plan a diagnostic work-up. In the case of typical symptoms of a drug hypersensitivity reaction and unequivocal findings from validated skin and/or laboratory tests, a reaction can be attributed to a trigger with sufficient confidence. However, skin and laboratory tests are often negative or insufficiently reliable. In such cases, controlled provocation testing is required to clarify drug reactions. This method is reliable and safe when attention is paid to indications and contraindications and performed under appropriate medical supervision. The results of the overall assessment are discussed with the patient and documented in an „allergy passport“ in order to ensure targeted avoidance in the future and allow the use of alternative drugs where possible.
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Affiliation(s)
- Knut Brockow
- Department of Dermatology and Allergology Biederstein, Technical University of Munich, Biedersteiner Straße 29, 80802 Munich, Germany
| | - Bernhard Przybilla
- Department of Dermatology and Allergology, Allergy Center, Ludwig Maximilian University of Munich, Munich, Germany
| | - Werner Aberer
- Department of Dermatology, Medical University of Graz, Graz, Austria
| | - Andreas J Bircher
- Department of Allergology, University Hospital Basle, Basle, Switzerland
| | - Randolf Brehler
- Department of Dermatology, Münster University Hospital, Münster, Germany
| | - Heinrich Dickel
- Department of Dermatology, Venereology and Allergology, St. Josef Hospital, Ruhr University Bochum, Bochum, Germany
| | - Thomas Fuchs
- Department of Dermatology, Venereology and Allergology, Göttingen University Hospital, Göttingen, Germany
| | - Thilo Jakob
- Department of Dermatology and Venereology, Freiburg University Hospital, Freiburg, Germany
| | - Lars Lange
- Department of Pediatrics, Marien Hospital Bonn, Bonn, Germany
| | - Wolfgang Pfützner
- Department of Dermatology and Allergology, Gießen and Marburg University Hospital, Marburg, Germany
| | - Maja Mockenhaupt
- German Center for the Documentation of Severe Skin Reactions, Department of Dermatology and Venereology, Freiburg University Hospital, Freiburg, Germany
| | - Hagen Ott
- Children's and Adolescents' Hospital "Auf der Bult,", Hannover, Germany
| | - Oliver Pfaar
- ENT at Mannheim University Hospital, Center for Rhinology and Allergology, Wiesbaden, Germany
| | - Johannes Ring
- Department of Dermatology and Allergology Biederstein, Technical University of Munich, Biedersteiner Straße 29, 80802 Munich, Germany
| | - Bernhardt Sachs
- Federal Institute for Drugs and Medicinal Products, Bonn, Germany
| | - Helmut Sitter
- Institute of Theoretical Surgery, Philipps University, Marburg, Germany
| | - Axel Trautmann
- Department of Dermatology and Allergology, Mainfranken Allergy, Würzburg University Hospital, Würzburg, Germany
| | - Regina Treudler
- Department of Dermatology, Venereology and Allergology, Leipzig University, Leipzig, Germany
| | - Bettina Wedi
- Department of Dermatology, Venereology and Allergology, Hannover Medical University, Hannover, Germany
| | - Margitta Worm
- Department of Dermatology, Venereology and Allergology, Charité University Hospital, Berlin, Germany
| | - Gerda Wurpts
- Department of Dermatology and Allergology, RTWH Aachen, Aachen, Germany
| | - Torsten Zuberbier
- Department of Dermatology, Venereology and Allergology, Charité University Hospital, Berlin, Germany
| | - Hans F Merk
- Department of Dermatology and Allergology, RTWH Aachen, Aachen, Germany
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Abstract
CONTEXT Cardiomyocyte apoptosis plays a critical role in the progress of heart diseases. Fucoidan, a complex-sulfated polysaccharide, has been reported to possess potential cardioprotective efficacy in vivo. OBJECTIVE The present study determines whether fucoidan could provide cardioprotection on hypoxia-induced cardiomyocyte apoptosis. MATERIALS AND METHODS H9c2 cardiomyoblast cells were incubated with various concentrations (15, 30, and 60 μg/ml) of fucoidan in a humidified incubator at 37 °C with 95% O2 and 5% CO2. After 6 h, hypoxia was processed and the cardioprotective effects of fucoidan were evaluated by applying MTT, ELISA, Hoechst 33258 nucleus staining, and western blot. RESULTS Following a 6 h exposure of H9c2 to hypoxic condition, significant reduction was found in cell survival (0.57-fold) and superoxide dismutase (SOD) activity (0.56-fold), which were associated with the increase of malondialdehyde (MDA) level (2.58-fold), creatine phosphokinase (CK, 3.57-fold), and lactate dehydrogenase (LDH) activities (2.39-fold). Moreover, hypoxia-induced apoptosis was confirmed by Hoechst 33258 nuclear staining, and these changes were accompanied by the increase of Bcl-2 (1.27-fold) and Bax expression (2.6-fold). However, preincubation of the cells with fucoidan prior to hypoxia exposure elevated the cell viability (30 μg/ml, 1.18-fold; 60 μg/ml, 1.32-fold) and SOD activity (30 μg/ml, 1.12-fold; 60 μg/ml, 1.25-fold), but decreased the MDA level (30 μg/ml, 0.70-fold; 60 μg/ml, 0.80-fold), CK (30 μg/ml, 0.69-fold; 60 μg/ml, 0.76-fold), and LDH (30 μg/ml, 0.67-fold; 60 μg/ml, 0.86-fold) leakages. Hoechst 33258 nuclear staining observations demonstrated the same protective effect of fucoidan on hypoxia-induced myocardial injury. Also, cardioprotective effects of fucoidan were reflected by increasing Bcl-2 (60 μg/ml, 1.84-fold), as well as decreasing Bax (60 μg/ml, 0.6-fold). CONCLUSION Fucoidan had protective effect against hypoxia-induced cardiomyocytes apoptosis, and the mechanism might involve protections of the cell from oxidative injury.
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Affiliation(s)
- S M Zhang
- School of Pharmacy, Binzhou Medical College , Yantai , China and
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Wang T, Pelletier MH, Bertollo N, Crosky A, Walsh WR. Cement-implant interface contamination: possible reason of inferior clinical outcomes for rough surface cemented stems. Open Orthop J 2013; 7:250-7. [PMID: 23898352 PMCID: PMC3722542 DOI: 10.2174/1874325001307010250] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Revised: 04/13/2013] [Accepted: 04/20/2013] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Shape-closed cemented implants rely on a stronger bond and have displayed inferior clinical outcomes when compared to force-closed designs. Implant contamination such as saline, bone marrow and blood prior to cement application has the potential to affect the cement-implant bond. The consequences of implant contamination were investigated in this study. METHODS Fifty Titanium alloy (Ti-6Al-4V) dowels were separated into ten groups based on surface roughness and contaminant, and then cemented in polyvinyl chloride tubes. Push-out testing was performed at 1mm per minute. The roughness of the dowel surface was measured before and after the testing. The dowel surface and cement mantel were analyzed using a Scanning Electron Microscopy (SEM) to determine the distribution and characteristics of any debris and contaminants on the surface. RESULTS Contaminants largely decreased stem-cement interfacial shear strength, especially for rough surfaces. Saline produced the greatest decrease, followed by blood. The effect of bone marrow was less pronounced and similar to that of oil. Increasing surface roughness increased the interfacial bonding strength, even with contaminants. There was a non-significant increase in mean bonding strength for smooth surfaces with bone marrow and oil contamination. SEM showed that contaminants influence the interfacial bond by different mechanisms. More debris was found on rough samples following testing. CONCLUSIONS The results of this study underscore the importance of keeping an implant free from contamination, and suggest if contamination does occur, a saline rinse may further decrease the stability of an implant. The deleterious effects of contamination on rough surface cement bonding were considerable, and indicate that contamination at the time of surgery may, in part, contribute to inferior clinical outcomes for rough surfaced cemented stems.
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Affiliation(s)
- Tian Wang
- Surgical and Orthopaedic Research Laboratories, University of New South Wales, Prince of Wales Clinical School, Sydney, NSW 2031, Australia ; School of Materials Science & Engineering, University of New South Wales, Sydney, NSW 2052, Australia
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Wilke HJ, Ressel L, Heuer F, Graf N, Rath S. Can prevention of a reherniation be investigated? Establishment of a herniation model and experiments with an anular closure device. Spine (Phila Pa 1976) 2013; 38:E587-93. [PMID: 23429676 DOI: 10.1097/BRS.0b013e31828ca4bc] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN Biomechanical in vitro study. OBJECTIVE To establish a reliable in vitro herniation model with human cadaver spines that enables evaluation of anular closure devices. SUMMARY OF BACKGROUND DATA Biomechanically, it is desirable to close anulus defects after disc herniation to preserve as much nucleus as possible. Multiple anular closure options exist to prevent reherniation. A reliable test procedure is needed to evaluate the efficacy and reliability of these implants. METHODS Two groups of human lumbar segments (n = 6 per group) were tested under cyclic loading until herniation occurred or 100,000 load cycles were applied. One group contained moderate/severe degenerated discs. A second group had mild degenerated discs. Intradiscal pressure was measured in the intact state to confirm disc quality.If herniation occurred, the extruded material was reinserted into the disc and the anulus defect was treated with the Barricaid anular closure device (Intrinsic Therapeutics, Inc., Woburn, MA). Disc height and 3-dimensional flexibility of the specimens in the intact, defect, and implanted states were measured under pure moments in each principal motion plane. Afterwards, provocation of reherniation was attempted with additional 100,000 load cycles. RESULTS Likelihood of herniation was strongly linked to disc degeneration and supported by the magnitude of intradiscal pressure. In moderate/severe degenerated discs, only 1 herniation was created. In mild degenerated discs, herniations were reliably created in all specimens. Using this worst-case model, herniation caused a significant reduction of disc height, which was nearly restored with the implant. In no case was reherniation or implant migration visible after 100,000 load cycles after Barricaid implantation. CONCLUSION We established a human herniation model that reliably produced nucleus extrusion during cyclic loading by selecting specimens with low disc degeneration. The Barricaid seems to prevent nucleus from reherniating. The reliability of this method suggests the opportunity to investigate other anulus closure devices and nucleus replacement techniques critically.
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de Vries RBM, Leenaars M, Tra J, Huijbregtse R, Bongers E, Jansen JA, Gordijn B, Ritskes-Hoitinga M. The potential of tissue engineering for developing alternatives to animal experiments: a systematic review. J Tissue Eng Regen Med 2013; 9:771-8. [PMID: 23554402 DOI: 10.1002/term.1703] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Revised: 11/28/2012] [Accepted: 12/20/2012] [Indexed: 01/18/2023]
Abstract
An underexposed ethical issue raised by tissue engineering is the use of laboratory animals in tissue engineering research. Even though this research results in suffering and loss of life in animals, tissue engineering also has great potential for the development of alternatives to animal experiments. With the objective of promoting a joint effort of tissue engineers and alternative experts to fully realise this potential, this study provides the first comprehensive overview of the possibilities of using tissue-engineered constructs as a replacement of laboratory animals. Through searches in two large biomedical databases (PubMed, Embase) and several specialised 3R databases, 244 relevant primary scientific articles, published between 1991 and 2011, were identified. By far most articles reviewed related to the use of tissue-engineered skin/epidermis for toxicological applications such as testing for skin irritation. This review article demonstrates, however, that the potential for the development of alternatives also extends to other tissues such as other epithelia and the liver, as well as to other fields of application such as drug screening and basic physiology. This review discusses which impediments need to be overcome to maximise the contributions that the field of tissue engineering can make, through the development of alternative methods, to the reduction of the use and suffering of laboratory animals.
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Affiliation(s)
- Rob B M de Vries
- 3R Research Centre / SYRCLE, Central Animal Laboratory, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Marlies Leenaars
- 3R Research Centre / SYRCLE, Central Animal Laboratory, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Joppe Tra
- Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | | | - Erik Bongers
- Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - John A Jansen
- Department of Periodontology and Biomaterials, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Bert Gordijn
- Institute of Ethics, Dublin City University, Dublin, Ireland
| | - Merel Ritskes-Hoitinga
- 3R Research Centre / SYRCLE, Central Animal Laboratory, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
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Badar M, Hemmen K, Nimtz M, Stieve M, Stiesch M, Lenarz T, Hauser H, Möllmann U, Vogt S, Schnabelrauch M, Mueller PP. Evaluation of madurahydroxylactone as a slow release antibacterial implant coating. Open Biomed Eng J 2010; 4:263-70. [PMID: 21625377 PMCID: PMC3102426 DOI: 10.2174/1874120701004010263] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2010] [Revised: 08/09/2010] [Accepted: 08/12/2010] [Indexed: 11/22/2022] Open
Abstract
Madurahydroxylactone (MHL), a secondary metabolite with antibacterial activity was evaluated for its suitability to generate controlled drug release coatings on medical implant materials. A smooth and firmly attached layer could be produced from a precursor solution on various metallic implant materials. In physiological salt solutions these coatings dissolved within a time period up to one week. A combination of MHL with a broad spectrum fluoroquinolone antibiotic was used to create a coating that was active against all bacterial strains tested. The time period during which the coating remained active against Pseudomonas aeruginosa was investigated. The results indicated a delayed drug release from single layer coatings in the course of seven days. MHL was biocompatible in cell culture assays and could after a delay even serve as a cell adhesion substrate for human or murine cells. The findings indicate a potential for MHL for the generation of delayed release antimicrobial implant coatings.
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Affiliation(s)
- Muhammad Badar
- Helmholtz Centre for Infection Research, Inhoffenstrasse 7, 38124 Braunschweig, Germany
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Lugonja NM, Martinov OB, Rasovic MR, Spasic SD, Gojgic GD, Vrvic MM. A Comparative Investigation of an in vitro and Clinical Test of the Bifidogenic Effect of an Infant Formula. J Clin Biochem Nutr 2010; 47:208-16. [PMID: 21103029 PMCID: PMC2966930 DOI: 10.3164/jcbn.10-54] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2010] [Accepted: 06/28/2010] [Indexed: 12/29/2022] Open
Abstract
The bifidogenic effect of an infant formula supplemented with inulin and fructooligosaccharides (4.0 g/l) was examined clinically and in vitro, and compared that of mature breast milk. In a 28-day clinical study, fecal samples of 21 infants, divided into two groups: one receiving the infant formula and the other breast milk, were microbiologically and biochemically examined. In the in vitro investigation, microbiological and biochemical changes in the infant formula and breast milk induced by the action of bifidobacteria isolated from infant feces were examined. There were no significant differences in the fecal numbers of lactobacilli, total aerobes, anaerobes or yeasts and fungi. In contrast, the bifidobacteria numbers in the stools increased significantly during the study in the infants receiving the supplemented formula. The comparative in vitro test showed that the bifidogenic effect was similar for infant formula and breast milk in terms of the number of bifidobacteria. Consumption of infant formula with added inulin and fructooligosaccharides stimulated the bifidogenic effect, both clinically and in vitro. The in vitro test can quickly and objectively determine the bifidogenic effect of infant formula and indicate their quality. However, a clinical test is necessary to determine the acceptance and biological value of infant formula.
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Affiliation(s)
- Nikoleta M Lugonja
- Faculty of Chemistry, University of Belgrade, 11158 Belgrade, Studentski trg 16, P.O. Box 51, Serbia
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Abstract
Iron oxide nanoparticles (IONPs) have been employed for hyperthermia treatments, stem cell therapies, cell labeling, and imaging modalities. The biocompatibility and cytotoxic effects of iron oxide nanoparticles when used in biomedical applications, however, are an ongoing concern. Endothelial cells have a critical role in this research dealing with tumors, cardiovascular disease and inflammation. However, there is little information dealing with the biologic effects of IONPs on the endothelial cell. This paper deals with the influence of dextran and citric acid coated IONPs on the behavior and function of human umbilical vein endothelial cells (HUVECs). After exposing endothelial cells to IONPs, dose-dependent effects on HUVECs viability, cytoskeleton and function were determined. Both citric acid and dextran coated particles appeared to be largely internalized by HUVECs through endocytosis and contribute to eventual cell death possibly by apoptosis. Cytoskeletal structures were greatly disrupted, as evidenced by diminished vinculin spots, and disorganized actin fiber and tubulin networks. The capacity of HUVECs to form a vascular network on Matrigel™ diminished after exposure to IONPs. Cell migration/invasion were inhibited significantly even at very low iron concentrations (0.1 mM). The results of this study indicate the great importance of thoroughly understanding nanoparticle-cell interactions, and the potential to exploit this understanding in tumor therapy applications involving IONPs as thermo/chemoembolization agents.
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Affiliation(s)
- Xinying Wu
- Department of Radiology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
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