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Lauterboeck L, Kang SW, White D, Bao R, Mobasheran P, Yang Q. IF1 Promotes Cellular Proliferation and Inhibits Oxidative Phosphorylation in Mouse Embryonic Fibroblasts under Normoxia and Hypoxia. Cells 2024; 13:551. [PMID: 38534395 DOI: 10.3390/cells13060551] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 03/12/2024] [Accepted: 03/16/2024] [Indexed: 03/28/2024] Open
Abstract
ATP synthase inhibitory factor subunit 1 (IF1) is an inhibitory subunit of mitochondrial ATP synthase, playing a crucial role in regulating mitochondrial respiration and energetics. It is well-established that IF1 interacts with the F1 sector of ATP synthase to inhibit the reversal rotation and, thus, ATP hydrolysis. Recent evidence supports that IF1 also inhibits forward rotation or the ATP synthesis activity. Adding to the complexity, IF1 may also facilitate mitophagy and cristae formation. The implications of these complex actions of IF1 for cellular function remain obscure. In the present study, we found that IF1 expression was markedly upregulated in hypoxic MEFs relative to normoxic MEFs. We investigate how IF1 affects cellular growth and function in cultured mouse embryonic fibroblasts derived from mouse lines with systemic IF1 overexpression and knockout under normoxia and hypoxia. Cell survival and proliferation analyses revealed that IF1 overexpression exerted limited effects on cellular viability but substantially increased proliferation under normoxia, whereas it facilitated both cellular viability and proliferation under hypoxia. The absence of IF1 may have a pro-survival effect but not a proliferative one in both normoxia and hypoxia. Cellular bioenergetic analyses revealed that IF1 suppressed cellular respiration when subjected to normoxia and was even more pronounced when subjected to hypoxia with increased mitochondrial ATP production. In contrast, IF1 knockout MEFs showed markedly increased cellular respiration under both normoxia and hypoxia with little change in mitochondrial ATP. Glycolytic stress assay revealed that IF1 overexpression modestly increased glycolysis in normoxia and hypoxia. Interestingly, the absence of IF1 in MEFs led to substantial increases in glycolysis. Therefore, we conclude that IF1 mainly inhibits cellular respiration and enhances cellular glycolysis to preserve mitochondrial ATP. On the other hand, IF1 deletion can significantly facilitate cellular respiration and glycolysis without leading to mitochondrial ATP deficit.
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Affiliation(s)
- Lothar Lauterboeck
- Cardiovascular Center of Excellence, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA
- Cell Biology, Life Science Solutions, Thermo Fisher Scientific, Frederick, MD 21704, USA
| | - Sung Wook Kang
- Cardiovascular Center of Excellence, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA
| | - Donnell White
- Cardiovascular Center of Excellence, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA
- Department of Pharmacology and Experimental Therapeutics, School of Graduate Studies, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA
- School of Medicine, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA
| | - Rong Bao
- Cardiovascular Center of Excellence, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA
- Department of Pharmacology and Experimental Therapeutics, School of Graduate Studies, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA
| | - Parnia Mobasheran
- Cardiovascular Center of Excellence, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA
- Department of Pharmacology and Experimental Therapeutics, School of Graduate Studies, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA
| | - Qinglin Yang
- Cardiovascular Center of Excellence, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA
- Department of Pharmacology and Experimental Therapeutics, School of Graduate Studies, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA
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Sivaraman D, Nagel Y, Siqueira G, Chansoria P, Avaro J, Neels A, Nyström G, Sun Z, Wang J, Pan Z, Iglesias-Mejuto A, Ardao I, García-González CA, Li M, Wu T, Lattuada M, Malfait WJ, Zhao S. Additive Manufacturing of Nanocellulose Aerogels with Structure-Oriented Thermal, Mechanical, and Biological Properties. Adv Sci (Weinh) 2024:e2307921. [PMID: 38477181 DOI: 10.1002/advs.202307921] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 02/09/2024] [Indexed: 03/14/2024]
Abstract
Additive manufacturing (AM) is widely recognized as a versatile tool for achieving complex geometries and customized functionalities in designed materials. However, the challenge lies in selecting an appropriate AM method that simultaneously realizes desired microstructures and macroscopic geometrical designs in a single sample. This study presents a direct ink writing method for 3D printing intricate, high-fidelity macroscopic cellulose aerogel forms. The resulting aerogels exhibit tunable anisotropic mechanical and thermal characteristics by incorporating fibers of different length scales into the hydrogel inks. The alignment of nanofibers significantly enhances mechanical strength and thermal resistance, leading to higher thermal conductivities in the longitudinal direction (65 mW m-1 K-1 ) compared to the transverse direction (24 mW m-1 K-1 ). Moreover, the rehydration of printed cellulose aerogels for biomedical applications preserves their high surface area (≈300 m2 g-1 ) while significantly improving mechanical properties in the transverse direction. These printed cellulose aerogels demonstrate excellent cellular viability (>90% for NIH/3T3 fibroblasts) and exhibit robust antibacterial activity through in situ-grown silver nanoparticles.
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Affiliation(s)
- Deeptanshu Sivaraman
- Laboratory for Building Energy Materials and Components, Swiss Federal Laboratories for Materials Science and Technology, Empa, Dübendorf, 8600, Switzerland
- Department of Chemistry, University of Fribourg, Fribourg, 1700, Switzerland
| | - Yannick Nagel
- Cellulose and Wood Materials Laboratory, Swiss Federal Laboratories for Materials Science and Technology, Empa, Dübendorf, 8600, Switzerland
| | - Gilberto Siqueira
- Cellulose and Wood Materials Laboratory, Swiss Federal Laboratories for Materials Science and Technology, Empa, Dübendorf, 8600, Switzerland
| | - Parth Chansoria
- Department of Health Science and Technology, ETH Zürich, Zürich, 8092, Switzerland
| | - Jonathan Avaro
- Center for X-ray Analytics, Swiss Federal Laboratories for Materials Science and Technology, Empa, Dübendorf, 8600, Switzerland
| | - Antonia Neels
- Department of Chemistry, University of Fribourg, Fribourg, 1700, Switzerland
- Center for X-ray Analytics, Swiss Federal Laboratories for Materials Science and Technology, Empa, Dübendorf, 8600, Switzerland
| | - Gustav Nyström
- Cellulose and Wood Materials Laboratory, Swiss Federal Laboratories for Materials Science and Technology, Empa, Dübendorf, 8600, Switzerland
- Department of Health Science and Technology, ETH Zürich, Zürich, 8092, Switzerland
| | - Zhaoxia Sun
- Institute of Environmental Engineering, ETH Zürich, Zürich, 8092, Switzerland
- School of Light Industry and Engineering, South China University of Technology, Guangzhou, 510641, China
- Laboratory for Advanced Analytical Technologies, Swiss Federal Laboratories for Materials Science and Technology, Empa, Dübendorf, 8600, Switzerland
| | - Jing Wang
- Institute of Environmental Engineering, ETH Zürich, Zürich, 8092, Switzerland
- School of Light Industry and Engineering, South China University of Technology, Guangzhou, 510641, China
- Laboratory for Advanced Analytical Technologies, Swiss Federal Laboratories for Materials Science and Technology, Empa, Dübendorf, 8600, Switzerland
| | - Zhengyuan Pan
- School of Light Industry and Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Ana Iglesias-Mejuto
- AerogelsLab, I+D Farma Group (GI-1645), Department of Pharmacology, Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, iMATUS and Health Research Institute of Santiago de Compostela (IDIS), University of Santiago de Compostela, Santiago de Compostela, E-15782, Spain
| | - Inés Ardao
- BioFarma Research group, Department of Pharmacology, Pharmacy and Pharmaceutical Technology, Innopharma Drug Screening and Pharmacogenomics Platform, Centro Singular de Investigación en Medicina Molecular y Enfermedades Crónicas (CiMUS), University of Santiago de Compostela, Santiago de Compostela, E-15782, Spain
| | - Carlos A García-González
- AerogelsLab, I+D Farma Group (GI-1645), Department of Pharmacology, Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, iMATUS and Health Research Institute of Santiago de Compostela (IDIS), University of Santiago de Compostela, Santiago de Compostela, E-15782, Spain
| | - Mengmeng Li
- Laboratory for Building Energy Materials and Components, Swiss Federal Laboratories for Materials Science and Technology, Empa, Dübendorf, 8600, Switzerland
| | - Tingting Wu
- Laboratory for Building Energy Materials and Components, Swiss Federal Laboratories for Materials Science and Technology, Empa, Dübendorf, 8600, Switzerland
| | - Marco Lattuada
- Department of Chemistry, University of Fribourg, Fribourg, 1700, Switzerland
| | - Wim J Malfait
- Laboratory for Building Energy Materials and Components, Swiss Federal Laboratories for Materials Science and Technology, Empa, Dübendorf, 8600, Switzerland
| | - Shanyu Zhao
- Laboratory for Building Energy Materials and Components, Swiss Federal Laboratories for Materials Science and Technology, Empa, Dübendorf, 8600, Switzerland
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Guillén-Mancina E, García-Lozano MDR, Burgos-Morón E, Mazzotta S, Martínez-Aguado P, Calderón-Montaño JM, Vega-Pérez JM, López-Lázaro M, Iglesias-Guerra F, Vega-Holm M. Repurposing Study of 4-Acyl-1-phenylaminocarbonyl-2-substituted-piperazine Derivatives as Potential Anticancer Agents-In Vitro Evaluation against Breast Cancer Cells. Int J Mol Sci 2023; 24:17041. [PMID: 38069364 PMCID: PMC10706865 DOI: 10.3390/ijms242317041] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 11/21/2023] [Accepted: 11/28/2023] [Indexed: 12/18/2023] Open
Abstract
Breast cancer is the most common type of cancer in women. Although current treatments can increase patient survival, they are rarely curative when the disease is advanced (metastasis). Therefore, there is an urgent need to develop new cytotoxic drugs with a high selectivity toward cancer cells. Since repurposing approved drugs for cancer therapy has been a successful strategy in recent years, in this study, we screened a library of antiviral piperazine-derived compounds as anticancer agents. The compounds included a piperazine ring and aryl urea functions, which are privileged structures present in several anti-breast cancer drugs. The selective cytotoxic activity of a set of thirty-four 4-acyl-2-substituted piperazine urea derivatives against MCF7 breast cancer cells and MCF 10A normal breast cells was determined. Compounds 31, 32, 35, and 37 showed high selective anticancer activity against breast cancer cells and were also tested against another common type of cancer, non-small cell lung cancer (A549 lung cancer cells versus MRC-5 lung normal cells). Compounds 35 and 37 also showed selectivity against lung cancer cells. These results suggest that compounds 35 and 37 may be promising hit compounds for the development of new anticancer agents.
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Affiliation(s)
- Emilio Guillén-Mancina
- Department of Pharmacology, Faculty of Pharmacy, University of Seville, 41012 Seville, Spain; (E.G.-M.); (E.B.-M.); (J.M.C.-M.); (M.L.-L.)
| | - María del Rosario García-Lozano
- Department of Organic and Medicinal Chemistry, Faculty of Pharmacy, University of Seville, 41012 Seville, Spain; (M.d.R.G.-L.); (S.M.); (P.M.-A.); (J.M.V.-P.)
- Institute of Biomedicine of Seville (IBiS), Virgen del Rocío University Hospital, CSIC, University of Seville, 41013 Seville, Spain
| | - Estefanía Burgos-Morón
- Department of Pharmacology, Faculty of Pharmacy, University of Seville, 41012 Seville, Spain; (E.G.-M.); (E.B.-M.); (J.M.C.-M.); (M.L.-L.)
| | - Sarah Mazzotta
- Department of Organic and Medicinal Chemistry, Faculty of Pharmacy, University of Seville, 41012 Seville, Spain; (M.d.R.G.-L.); (S.M.); (P.M.-A.); (J.M.V.-P.)
- Department of Chemistry, University of Milan, 20133 Milan, Italy
| | - Pablo Martínez-Aguado
- Department of Organic and Medicinal Chemistry, Faculty of Pharmacy, University of Seville, 41012 Seville, Spain; (M.d.R.G.-L.); (S.M.); (P.M.-A.); (J.M.V.-P.)
- Institute of Biomedicine of Seville (IBiS), Virgen del Rocío University Hospital, CSIC, University of Seville, 41013 Seville, Spain
- Infectious Diseases and Microbiology Clinical Unit, University Hospital Virgen Macarena, 41009 Seville, Spain
- Departament of Medicine, School of Medicine, University of Seville, 41012 Seville, Spain
| | - José Manuel Calderón-Montaño
- Department of Pharmacology, Faculty of Pharmacy, University of Seville, 41012 Seville, Spain; (E.G.-M.); (E.B.-M.); (J.M.C.-M.); (M.L.-L.)
| | - José Manuel Vega-Pérez
- Department of Organic and Medicinal Chemistry, Faculty of Pharmacy, University of Seville, 41012 Seville, Spain; (M.d.R.G.-L.); (S.M.); (P.M.-A.); (J.M.V.-P.)
| | - Miguel López-Lázaro
- Department of Pharmacology, Faculty of Pharmacy, University of Seville, 41012 Seville, Spain; (E.G.-M.); (E.B.-M.); (J.M.C.-M.); (M.L.-L.)
| | - Fernando Iglesias-Guerra
- Department of Organic and Medicinal Chemistry, Faculty of Pharmacy, University of Seville, 41012 Seville, Spain; (M.d.R.G.-L.); (S.M.); (P.M.-A.); (J.M.V.-P.)
| | - Margarita Vega-Holm
- Department of Organic and Medicinal Chemistry, Faculty of Pharmacy, University of Seville, 41012 Seville, Spain; (M.d.R.G.-L.); (S.M.); (P.M.-A.); (J.M.V.-P.)
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Santonocito D, Campisi A, Pellitteri R, Sposito G, Basilicata MG, Aquino G, Pepe G, Sarpietro MG, Pittalà MGG, Schoubben A, Pignatello R, Puglia C. Lipid Nanoparticles Loading Steroidal Alkaloids of Tomatoes Affect Neuroblastoma Cell Viability in an In Vitro Model. Pharmaceutics 2023; 15:2573. [PMID: 38004552 PMCID: PMC10675799 DOI: 10.3390/pharmaceutics15112573] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 09/08/2023] [Revised: 10/27/2023] [Accepted: 10/27/2023] [Indexed: 11/26/2023] Open
Abstract
Tomato by-products represent a good source of phytochemical compounds with health properties, such as the steroidal glycoalkaloid α-tomatine (α-TM) and its aglycone tomatidine (TD). Both molecules have numerous beneficial properties, such as potential anticancer activity. Unfortunately, their therapeutic application is limited due to stability and bioavailability issues. Therefore, a valid strategy seems to be their encapsulation into Solid Lipid Nanoparticles (SLN). The nanoformulations containing α-TM (α-TM-SLN) and TD (TD-SLN) were prepared by solvent-diffusion technique and subsequently characterized in terms of technological parameters (particle size, polydispersity index, zeta potential, microscopy, and calorimetric studies). To assess the effect of α-TM and TD on the percentage of cellular viability in Olfactory Ensheathing Cells (OECs), a peculiar glial cell type of the olfactory system used as normal cells, and in SH-SY5Y, a neuroblastoma cancer cell line, an MTT test was performed. In addition, the effects of empty, α-TM-SLN, and TD-SLN were tested. Our results show that the treatment of OECs with blank-SLN, free α-TM (0.25 µg/mL), and TD (0.50 µg/mL) did not induce any significant change in the percentage of cell viability when compared with the control. In contrast, in SH-SY5Y-treated cells, a significant decrease in the percentage of cell viability when compared with the control was found. In particular, the effect appeared more evident when SH-SY5Y cells were exposed to α-TM-SLN and TD-SLN. No significant effect in blank-SLN-treated SH-SY5T cells was observed. Therefore, SLN is a promising approach for the delivery of α-TM and TD.
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Affiliation(s)
- Debora Santonocito
- Department of Drug and Health Sciences, University of Catania, Viale Andrea Doria 6, 95125 Catania, Italy; (A.C.); (G.S.); (M.G.S.); (R.P.)
- NANOMED-Research Center on Nanomedicine and Pharmaceutical Nanotechnology, University of Catania, 95125 Catania, Italy
| | - Agatina Campisi
- Department of Drug and Health Sciences, University of Catania, Viale Andrea Doria 6, 95125 Catania, Italy; (A.C.); (G.S.); (M.G.S.); (R.P.)
| | - Rosalia Pellitteri
- Institute for Biomedical Research and Innovation (IRIB), National Research Council, Via P. Gaifami 18, 95126 Catania, Italy;
| | - Giovanni Sposito
- Department of Drug and Health Sciences, University of Catania, Viale Andrea Doria 6, 95125 Catania, Italy; (A.C.); (G.S.); (M.G.S.); (R.P.)
| | - Manuela Giovanna Basilicata
- Department of Pharmacy, University of Salerno, Via G. Paolo II 132, 84084 Fisciano, SA, Italy; (M.G.B.); (G.A.); (G.P.)
| | - Giovanna Aquino
- Department of Pharmacy, University of Salerno, Via G. Paolo II 132, 84084 Fisciano, SA, Italy; (M.G.B.); (G.A.); (G.P.)
- PhD Program in Drug Discovery and Development, University of Salerno, 84084 Fisciano, SA, Italy
| | - Giacomo Pepe
- Department of Pharmacy, University of Salerno, Via G. Paolo II 132, 84084 Fisciano, SA, Italy; (M.G.B.); (G.A.); (G.P.)
| | - Maria Grazia Sarpietro
- Department of Drug and Health Sciences, University of Catania, Viale Andrea Doria 6, 95125 Catania, Italy; (A.C.); (G.S.); (M.G.S.); (R.P.)
| | | | - Aurelie Schoubben
- Department of Pharmaceutical Sciences, University of Perugia, 06123 Perugia, Italy;
| | - Rosario Pignatello
- Department of Drug and Health Sciences, University of Catania, Viale Andrea Doria 6, 95125 Catania, Italy; (A.C.); (G.S.); (M.G.S.); (R.P.)
- NANOMED-Research Center on Nanomedicine and Pharmaceutical Nanotechnology, University of Catania, 95125 Catania, Italy
| | - Carmelo Puglia
- Department of Drug and Health Sciences, University of Catania, Viale Andrea Doria 6, 95125 Catania, Italy; (A.C.); (G.S.); (M.G.S.); (R.P.)
- NANOMED-Research Center on Nanomedicine and Pharmaceutical Nanotechnology, University of Catania, 95125 Catania, Italy
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5
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Kim H, Kim EJ, Ngo HV, Nguyen HD, Park C, Choi KH, Park JB, Lee BJ. Cellular Efficacy of Fattigated Nanoparticles and Real-Time ROS Occurrence Using Microfluidic Hepatocarcinoma Chip System: Effect of Anticancer Drug Solubility and Shear Stress. Pharmaceuticals (Basel) 2023; 16:1330. [PMID: 37765137 PMCID: PMC10536289 DOI: 10.3390/ph16091330] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 09/09/2023] [Accepted: 09/13/2023] [Indexed: 09/29/2023] Open
Abstract
The objective of this study was to evaluate the effectiveness of organ-on-chip system investigating simultaneous cellular efficacy and real-time reactive oxygen species (ROS) occurrence of anticancer drug-loaded nanoparticles (NPs) using hepatocarcinoma cells (HepG2) chip system under static and hepatomimicking shear stress conditions (5 dyne/cm2). Then, the role of hepatomimetic shear stress exposed to HepG2 and drug solubility were compared. The highly soluble doxorubicin (DOX) and poorly soluble paclitaxel (PTX) were chosen. Fattigated NPs (AONs) were formed via self-assembly of amphiphilic albumin (HSA)-oleic acid conjugate (AOC). Then, drug-loaded AONs (DOX-AON or PTX-AON) were exposed to a serum-free HepG2 medium at 37 °C and 5% carbon dioxide for 24 h using a real-time ROS sensor chip-based microfluidic system. The cellular efficacy and simultaneous ROS occurrence of free drugs and drug-loaded AONs were compared. The cellular efficacy of drug-loaded AONs varied in a dose-dependent manner and were consistently correlated with real-time of ROS occurrence. Drug-loaded AONs increased the intracellular fluorescence intensity and decreased the cellular efficacy compared to free drugs under dynamic conditions. The half-maximal inhibitory concentration (IC50) values of free DOX (13.4 μg/mL) and PTX (54.44 μg/mL) under static conditions decreased to 11.79 and 38.43 μg/mL, respectively, under dynamic conditions. Furthermore, DOX- and PTX-AONs showed highly decreased IC50 values of 5.613 and 21.86 μg/mL, respectively, as compared to free drugs under dynamic conditions. It was evident that cellular efficacy and real-time ROS occurrence were well-correlated and highly dependent on the drug-loaded nanostructure, drug solubility and physiological shear stress.
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Affiliation(s)
- Hoyoung Kim
- College of Pharmacy, Ajou University, Suwon 16499, Republic of Korea; (H.K.); (E.-J.K.); (H.V.N.); (H.D.N.)
| | - Eun-Ji Kim
- College of Pharmacy, Ajou University, Suwon 16499, Republic of Korea; (H.K.); (E.-J.K.); (H.V.N.); (H.D.N.)
| | - Hai V. Ngo
- College of Pharmacy, Ajou University, Suwon 16499, Republic of Korea; (H.K.); (E.-J.K.); (H.V.N.); (H.D.N.)
| | - Hy D. Nguyen
- College of Pharmacy, Ajou University, Suwon 16499, Republic of Korea; (H.K.); (E.-J.K.); (H.V.N.); (H.D.N.)
| | - Chulhun Park
- College of Pharmacy, Jeju National University, Jeju 63243, Republic of Korea;
| | - Kyung Hyun Choi
- Advanced Micro-Mechatronics Lab, Mechatronics Engineering, Jeju National University, Jeju 63243, Republic of Korea;
- BioSpero, Jeju 63309, Republic of Korea
| | - Jun-Bom Park
- College of Pharmacy, Sahmyook University, Seoul 01795, Republic of Korea;
| | - Beom-Jin Lee
- College of Pharmacy, Ajou University, Suwon 16499, Republic of Korea; (H.K.); (E.-J.K.); (H.V.N.); (H.D.N.)
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6
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Carvalho JPF, Vieira T, Silva JC, Soares PIP, Ferreira NM, Amorim CO, Teixeira SS, Graça MPF. Potassium Ferrite for Biomedical Applications. Materials (Basel) 2023; 16:ma16103880. [PMID: 37241507 DOI: 10.3390/ma16103880] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 05/14/2023] [Accepted: 05/16/2023] [Indexed: 05/28/2023]
Abstract
Ferrites have been widely studied for their use in the biomedical area, mostly due to their magnetic properties, which gives them the potential to be used in diagnostics, drug delivery, and in treatment with magnetic hyperthermia, for example. In this work, KFeO2 particles were synthesized with a proteic sol-gel method using powdered coconut water as a precursor; this method is based on the principles of green chemistry. To improve its properties, the base powder obtained was subjected to multiple heat treatments at temperatures between 350 and 1300 °C. The samples obtained underwent structural, morphological, biocompatibility, and magnetic characterization. The results show that upon raising the heat treatment temperature, not only is the wanted phase detected, but also the secondary phases. To overcome these secondary phases, several different heat treatments were carried out. Using scanning electron microscopy, grains in the micrometric range were observed. Saturation magnetizations between 15.5 and 24.1 emu/g were observed for the samples containing KFeO2 with an applied field of 50 kOe at 300 K. From cellular compatibility (cytotoxicity) assays, for concentrations up to 5 mg/mL, only the samples treated at 350 °C were cytotoxic. However, the samples containing KFeO2, while being biocompatible, had low specific absorption rates (1.55-5.76 W/g).
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Affiliation(s)
- João P F Carvalho
- i3N and Department of Physics, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Tânia Vieira
- i3N/CENIMAT, Physics Department, NOVA School of Science and Technology, Campus de Caparica, NOVA University Lisbon, 2829-516 Caparica, Portugal
| | - Jorge Carvalho Silva
- i3N/CENIMAT, Physics Department, NOVA School of Science and Technology, Campus de Caparica, NOVA University Lisbon, 2829-516 Caparica, Portugal
| | - Paula I P Soares
- i3N/CENIMAT, Materials Science Department, NOVA School of Science and Technology, Campus de Caparica, NOVA University Lisbon, 2829-516 Caparica, Portugal
| | - Nuno M Ferreira
- i3N and Department of Physics, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Carlos O Amorim
- CICECO-Aveiro Institute of Materials and Department of Physics, University of Aveiro, 3810-193 Aveiro, Portugal
| | | | - Manuel P F Graça
- i3N and Department of Physics, University of Aveiro, 3810-193 Aveiro, Portugal
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7
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Culcasi M, Delehedde C, Esgulian M, Cassien M, Chocry M, Rockenbauer A, Pietri S, Thétiot-Laurent S. New Biocompatible β-Phosphorylated Linear Nitrones Targeting Mitochondria: Protective Effect in Apoptotic Cells. Chembiochem 2023; 24:e202200749. [PMID: 36779388 DOI: 10.1002/cbic.202200749] [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: 12/16/2022] [Revised: 02/10/2023] [Accepted: 02/13/2023] [Indexed: 02/14/2023]
Abstract
Mitochondria, an essential organelle involved in cellular respiration, energy production, and cell death, is the main cellular source of reactive oxygen species (ROS), including superoxide. Mitochondrial diseases resulting from uncontrolled/excess ROS generation are an emerging public health concern and there is current interest for specific mitochondriotropic probes to get information on in situ ROS production. As such, nitrones vectorized by the triphenylphosphonium (TPP) cation have recently drawn attention despite reported cytotoxicity. Herein, we describe the synthesis of 13 low-toxic derivatives of N-benzylidene-1-diethoxyphosphoryl-1-methylethylamine N-oxide (PPN) alkyl chain-grafted to a pyridinium, triethylammonium or berberinium lipophilic cation. These nitrones showed in vitro superoxide quenching activity and EPR/spin-trapping efficiency towards biologically relevant free radicals, including superoxide and hydroxyl radicals. Their mitochondrial penetration was confirmed by 31P NMR and anti-apoptotic properties assessed in hydrogen peroxide treated Schwann cells. Two pyridinium substituted PPNs were identified as potentially better alternatives to TPP nitrones conjugates for studies of mitochondrial oxidative damage.
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Affiliation(s)
- Marcel Culcasi
- Aix-Marseille Universite, Institut de Chimie Radicalaire, Campus St Jérôme - ICR, Avenue escadrille Normandie-Niemen, SMBSO - case 522, 13013, Marseille, FRANCE
| | - Caroline Delehedde
- Aix-Marseille Universite, Institut de Chimie Radicalaire, Campus St Jérôme - ICR, Avenue escadrille Normandie-Niemen, SMBSO - case 522, 13013, Marseille, FRANCE
| | - Mathieu Esgulian
- Aix-Marseille Universite, Institut de Chimie Radicalaire, Campus St Jérôme - ICR, Avenue escadrille Normandie-Niemen, SMBSO - case 522, 13013, Marseille, FRANCE
| | - Mathieu Cassien
- Aix-Marseille Universite, Institut de Chimie Radicalaire, Campus St Jérôme - ICR, Avenue escadrille Normandie-Niemen, SMBSO - case 522, 13013, Marseille, FRANCE
| | - Mathieu Chocry
- Aix-Marseille Universite, Institut de Chimie Radicalaire, Campus St Jérôme - ICR, Avenue escadrille Normandie-Niemen, SMBSO - case 522, 13013, Marseille, FRANCE
| | - Antal Rockenbauer
- Hungarian Academy of Sciences Research Centre for Natural Sciences: Termeszettudomanyi Kutatokozpont, Institute of Materials and Environmental Chemistry, Budapest University of Technology and Economics, 1117, Budapest, HUNGARY
| | - Sylvia Pietri
- Aix-Marseille Universite, Institut de Chimie Radicalaire, Campus St Jérôme - ICR, Avenue escadrille Normandie-Niemen, SMBSO - case 522, 13013, Marseille, FRANCE
| | - Sophie Thétiot-Laurent
- Aix-Marseille Université, Institut de Chimie Radicalaire, Campus St Jérôme - ICR, Avenue escadrille Normandie-Niemen, SMBSO - case 522, 13013, Marseille, FRANCE
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8
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Deshmukh K, Gupta S, Mitra K, Bit A. Numerical and Experimental Analysis of Shear Stress Influence on Cellular Viability in Serpentine Vascular Channels. Micromachines (Basel) 2022; 13:mi13101766. [PMID: 36296119 PMCID: PMC9611698 DOI: 10.3390/mi13101766] [Citation(s) in RCA: 1] [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] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 09/19/2022] [Accepted: 10/14/2022] [Indexed: 05/29/2023]
Abstract
3D bioprinting has emerged as a tool for developing in vitro tissue models for studying disease progression and drug development. The objective of the current study was to evaluate the influence of flow driven shear stress on the viability of cultured cells inside the luminal wall of a serpentine network. Fluid-structure interaction was modeled using COMSOL Multiphysics for representing the elasticity of the serpentine wall. Experimental analysis of the serpentine model was performed on the basis of a desirable inlet flow boundary condition for which the most homogeneously distributed wall shear stress had been obtained from numerical study. A blend of Gelatin-methacryloyl (GelMA) and PEGDA200 PhotoInk was used as a bioink for printing the serpentine network, while facilitating cell growth within the pores of the gelatin substrate. Human umbilical vein endothelial cells were seeded into the channels of the network to simulate the blood vessels. A Live-Dead assay was performed over a period of 14 days to observe the cellular viability in the printed vascular channels. It was observed that cell viability increases when the seeded cells were exposed to the evenly distributed shear stresses at an input flow rate of 4.62 mm/min of the culture media, similar to that predicted in the numerical model with the same inlet boundary condition. It leads to recruitment of a large number of focal adhesion point nodes on cellular membrane, emphasizing the influence of such phenomena on promoting cellular morphologies.
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Affiliation(s)
- Khemraj Deshmukh
- Department of Biomedical Engineering, National Institute of Technology, Raipur 492010, India
| | - Saurabh Gupta
- Department of Biomedical Engineering, National Institute of Technology, Raipur 492010, India
| | - Kunal Mitra
- Biomedical Engineering, Florida Tech, Melbourne, FL 32901, USA
| | - Arindam Bit
- Department of Biomedical Engineering, National Institute of Technology, Raipur 492010, India
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9
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García-Recio E, Costela-Ruiz VJ, Melguizo-Rodriguez L, Ramos-Torrecillas J, García-Martínez O, Ruiz C, de Luna-Bertos E. Repercussions of Bisphenol A on the Physiology of Human Osteoblasts. Int J Mol Sci 2022; 23:ijms23105349. [PMID: 35628159 PMCID: PMC9140407 DOI: 10.3390/ijms23105349] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 05/04/2022] [Accepted: 05/09/2022] [Indexed: 11/16/2022] Open
Abstract
(1) Background: Bisphenol A (BPA) is an endocrine disruptor that is widely present in the environment and exerts adverse effects on various body tissues. The objective of this study was to determine its repercussions on bone tissue by examining its impact on selected functional parameters of human osteoblasts. (2) Methods: Three human osteoblast lines were treated with BPA at doses of 10-5, 10-6, or 10-7 M. At 24 h post-treatment, a dose-dependent inhibition of cell growth, alkaline phosphatase activity, and mineralization was observed. (4) Results: The expression of CD54 and CD80 antigens was increased at doses of 10-5 and 10-6 M, while the phagocytic capacity and the expression of osteogenic genes (ALP, COL-1, OSC, RUNX2, OSX, BMP-2, and BMP-7) were significantly and dose-dependently reduced in the presence of BPA. (5) Conclusions: According to these findings, BPA exerts adverse effects on osteoblasts by altering their differentiation/maturation and their proliferative and functional capacity, potentially affecting bone health. Given the widespread exposure to this contaminant, further human studies are warranted to determine the long-term risk to bone health posed by BPA.
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Affiliation(s)
- Enrique García-Recio
- Biomedical Group (BIO277), Department of Nursing, Faculty of Health Sciences, University of Granada, Avda. Ilustración 60, 18016 Granada, Spain; (E.G.-R.); (V.J.C.-R.); (L.M.-R.); (J.R.-T.); (O.G.-M.); (E.d.L.-B.)
- Institute of Biosanitary Research, ibs.Granada, Avda. de Madrid, 15 Pabellón de Consultas Externas, 2ª Planta, 18012 Granada, Spain
| | - Víctor J. Costela-Ruiz
- Biomedical Group (BIO277), Department of Nursing, Faculty of Health Sciences, University of Granada, Avda. Ilustración 60, 18016 Granada, Spain; (E.G.-R.); (V.J.C.-R.); (L.M.-R.); (J.R.-T.); (O.G.-M.); (E.d.L.-B.)
- Institute of Biosanitary Research, ibs.Granada, Avda. de Madrid, 15 Pabellón de Consultas Externas, 2ª Planta, 18012 Granada, Spain
| | - Lucía Melguizo-Rodriguez
- Biomedical Group (BIO277), Department of Nursing, Faculty of Health Sciences, University of Granada, Avda. Ilustración 60, 18016 Granada, Spain; (E.G.-R.); (V.J.C.-R.); (L.M.-R.); (J.R.-T.); (O.G.-M.); (E.d.L.-B.)
- Institute of Biosanitary Research, ibs.Granada, Avda. de Madrid, 15 Pabellón de Consultas Externas, 2ª Planta, 18012 Granada, Spain
| | - Javier Ramos-Torrecillas
- Biomedical Group (BIO277), Department of Nursing, Faculty of Health Sciences, University of Granada, Avda. Ilustración 60, 18016 Granada, Spain; (E.G.-R.); (V.J.C.-R.); (L.M.-R.); (J.R.-T.); (O.G.-M.); (E.d.L.-B.)
- Institute of Biosanitary Research, ibs.Granada, Avda. de Madrid, 15 Pabellón de Consultas Externas, 2ª Planta, 18012 Granada, Spain
| | - Olga García-Martínez
- Biomedical Group (BIO277), Department of Nursing, Faculty of Health Sciences, University of Granada, Avda. Ilustración 60, 18016 Granada, Spain; (E.G.-R.); (V.J.C.-R.); (L.M.-R.); (J.R.-T.); (O.G.-M.); (E.d.L.-B.)
- Institute of Biosanitary Research, ibs.Granada, Avda. de Madrid, 15 Pabellón de Consultas Externas, 2ª Planta, 18012 Granada, Spain
| | - Concepción Ruiz
- Biomedical Group (BIO277), Department of Nursing, Faculty of Health Sciences, University of Granada, Avda. Ilustración 60, 18016 Granada, Spain; (E.G.-R.); (V.J.C.-R.); (L.M.-R.); (J.R.-T.); (O.G.-M.); (E.d.L.-B.)
- Institute of Biosanitary Research, ibs.Granada, Avda. de Madrid, 15 Pabellón de Consultas Externas, 2ª Planta, 18012 Granada, Spain
- Institute of Neuroscience, University of Granada, 18016 Granada, Spain
- Correspondence: ; Tel.: +34-958243497
| | - Elvira de Luna-Bertos
- Biomedical Group (BIO277), Department of Nursing, Faculty of Health Sciences, University of Granada, Avda. Ilustración 60, 18016 Granada, Spain; (E.G.-R.); (V.J.C.-R.); (L.M.-R.); (J.R.-T.); (O.G.-M.); (E.d.L.-B.)
- Institute of Biosanitary Research, ibs.Granada, Avda. de Madrid, 15 Pabellón de Consultas Externas, 2ª Planta, 18012 Granada, Spain
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10
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Hansda S, Ghosh R. Bystander effect of ultraviolet A radiation protects A375 melanoma cells by induction of antioxidant defense. J Environ Sci Health C Toxicol Carcinog 2021; 40:46-67. [PMID: 35895930 DOI: 10.1080/26896583.2021.1994820] [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] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Ultraviolet (UV) irradiated cells release factors that result in varied responses by non-irradiated cells via bystander effects (BE). The UV-BE is dependent on the cell types involved and on the wavelength of the radiation. Using conditioned medium from UVA-irradiated A375 human melanoma cells (UVA-CM), UVA-bystander response was evaluated on the viability of naïve A375 cells. UVA-CM treatment itself did not alter cell viability; however, UVA-CM treated bystander cells were more resistant to the lethal action of UVA, UVB, UVC or H2O2. Effects of UVA-CM on cell proliferation, mechanism of cell death, DNA damage, malondialdehyde formation, generation of reactive oxygen species (ROS) and antioxidant status were studied in A375 cells. We observed that UVA-CM triggered antioxidant defenses to elicit protective responses through elevation of antioxidant enzyme activities in cells, which persisted until 5 h after exposure to UVA-CM. This was possibly responsible for decreased generation of ROS and diminished DNA and membrane damage in cells. These bystander cells were resistant to killing when exposed to different genotoxic agents. Damaged nuclei, induction of apoptosis and autophagic death were also lowered in these cells. The influence of UVA-CM on cancer stem cells side population was assessed.Highlights:UVA radiation induced bystander effects in A375 cellsDamage by genotoxicants is suppressed due to lower ROS generation on UVA-CM treatmentUVA-CM exposure enhanced higher activities of CAT and GPxResistance to genotoxic agents in such cells was due to elevated antioxidant defenceUVA-bystander phenomenon was a protective response.
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Affiliation(s)
- Surajit Hansda
- Department of Biochemistry & Biophysics, University of Kalyani, Kalyani, India
| | - Rita Ghosh
- Department of Biochemistry & Biophysics, University of Kalyani, Kalyani, India
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11
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Moglia I, Santiago M, Guerrero S, Soler M, Olivera-Nappa A, Kogan MJ. Enhanced Cellular Uptake of H-Chain Human Ferritin Containing Gold Nanoparticles. Pharmaceutics 2021; 13:1966. [PMID: 34834381 DOI: 10.3390/pharmaceutics13111966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Revised: 11/12/2021] [Accepted: 11/15/2021] [Indexed: 11/17/2022] Open
Abstract
Gold nanoparticles (AuNP) capped with biocompatible layers have functional optical, chemical, and biological properties as theranostic agents in biomedicine. The ferritin protein containing in situ synthesized AuNPs has been successfully used as an effective and completely biocompatible nanocarrier for AuNPs in human cell lines and animal experiments in vivo. Ferritin can be uptaken by different cell types through receptor-mediated endocytosis. Despite these advantages, few efforts have been made to evaluate the toxicity and cellular internalization of AuNP-containing ferritin nanocages. In this work, we study the potential of human heavy-chain (H) and light-chain (L) ferritin homopolymers as nanoreactors to synthesize AuNPs and their cytotoxicity and cellular uptake in different cell lines. The results show very low toxicity of ferritin-encapsulated AuNPs on different human cell lines and demonstrate that efficient cellular ferritin uptake depends on the specific H or L protein chains forming the ferritin protein cage and the presence or absence of metallic cargo. Cargo-devoid apoferritin is poorly internalized in all cell lines, and the highest ferritin uptake was achieved with AuNP-loaded H-ferritin homopolymers in transferrin-receptor-rich cell lines, showing more than seven times more uptake than apoferritin.
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12
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Cojocaru E, Ghitman J, Biru EI, Pircalabioru GG, Vasile E, Iovu H. Synthesis and Characterization of Electrospun Composite Scaffolds Based on Chitosan-Carboxylated Graphene Oxide with Potential Biomedical Applications. Materials (Basel) 2021; 14:2535. [PMID: 34068207 PMCID: PMC8153126 DOI: 10.3390/ma14102535] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 04/10/2021] [Revised: 05/08/2021] [Accepted: 05/12/2021] [Indexed: 01/09/2023]
Abstract
This research study reports the development of chitosan/carboxylated graphene oxide (CS/GO-COOH) composite scaffolds with nanofibrous architecture using the electrospinning method. The concept of designed composite fibrous material is based on bringing together the biological properties of CS, mechanical, electrical, and biological characteristics of GO-COOH with the versatility and efficiency of ultra-modern electrospinning techniques. Three different concentrations of GO-COOH were added into a chitosan (CS)-poly(ethylene oxide) (PEO) solution (the ratio between CS/PEO was 3/7 (w/w)) and were used in the synthesis process of composite scaffolds. The effect of GO-COOH concentration on the spinnability, morphological and mechanical features, wettability, and biological properties of engineered fibrous scaffolds was thoroughly investigated. FTIR results revealed the non-covalent and covalent interactions that could take place between the system's components. The SEM micrographs highlighted the nanofibrous architecture of scaffolds, and the presence of GO-COOH sheets along the composite CS/GO-COOH nanofibers. The size distribution graphs showed a decreasing trend in the mean diameter of composite nanofibers with the increase in GO-COOH content, from 141.40 nm for CS/PG 0.1% to 119.88 nm for CS/PG 0.5%. The dispersion of GO-COOH led to composite scaffolds with increased elasticity; the Young's modulus of CS/PG 0.5% (84 ± 4.71 MPa) was 7.5-fold lower as compared to CS/PEO (662 ± 15.18 MPa, p < 0.0001). Contact angle measurements showed that both GO-COOH content and crosslinking step influenced the surface wettability of scaffolds, leading to materials with ~1.25-fold higher hydrophobicity. The in vitro cytocompatibility assessment showed that the designed nanofibrous scaffolds showed a reasonable cellular proliferation level after 72 h of contact with the fibroblast cells.
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Affiliation(s)
- Elena Cojocaru
- Advanced Polymer Materials Group, University Politehnica of Bucharest, 1-7 Polizu, 011061 Bucharest, Romania; (E.C.); (J.G.); (E.I.B.)
| | - Jana Ghitman
- Advanced Polymer Materials Group, University Politehnica of Bucharest, 1-7 Polizu, 011061 Bucharest, Romania; (E.C.); (J.G.); (E.I.B.)
| | - Elena Iuliana Biru
- Advanced Polymer Materials Group, University Politehnica of Bucharest, 1-7 Polizu, 011061 Bucharest, Romania; (E.C.); (J.G.); (E.I.B.)
| | - Gratiela Gradisteanu Pircalabioru
- Research Institute of the University of Bucharest (ICUB), University of Bucharest, 91-95 Splaiul Independentei, 050095 Bucharest, Romania;
| | - Eugeniu Vasile
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Material Science, University Politehnica of Bucharest, 1-7 Polizu, 011061 Bucharest, Romania;
| | - Horia Iovu
- Advanced Polymer Materials Group, University Politehnica of Bucharest, 1-7 Polizu, 011061 Bucharest, Romania; (E.C.); (J.G.); (E.I.B.)
- Academy of Romanian Scientists, 54 Splaiul Independentei, 050094 Bucharest, Romania
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13
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Banasiak K, Szulc NA, Pokrzywa W. The Dose-Dependent Pleiotropic Effects of the UBB +1 Ubiquitin Mutant. Front Mol Biosci 2021; 8:650730. [PMID: 33842548 PMCID: PMC8032880 DOI: 10.3389/fmolb.2021.650730] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 02/02/2021] [Indexed: 11/23/2022] Open
Abstract
The proteolytic machinery activity diminishes with age, leading to abnormal accumulation of aberrant proteins; furthermore, a decline in protein degradation capacity is associated with multiple age-related proteinopathies. Cellular proteostasis can be maintained via the removal of ubiquitin (Ub)-tagged damaged and redundant proteins by the ubiquitin-proteasome system (UPS). However, during aging, central nervous system (CNS) cells begin to express a frameshift-mutated Ub, UBB+1. Its accumulation is a neuropathological hallmark of tauopathy, including Alzheimer’s disease and polyglutamine diseases. Mechanistically, in cell-free and cell-based systems, an increase in the UBB+1 concentration disrupts proteasome processivity, leading to increased aggregation of toxic proteins. On the other hand, a low level of UBB+1 improves stress resistance and extends lifespan. Here we summarize recent findings regarding the impact of UBB+1 on Ub signaling and neurodegeneration. We also review the molecular basis of how UBB+1 affects UPS components as well as its dose-dependent switch between cytoprotective and cytotoxic roles.
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Affiliation(s)
- Katarzyna Banasiak
- Laboratory of Protein Metabolism, International Institute of Molecular and Cell Biology in Warsaw, Warsaw, Poland
| | - Natalia A Szulc
- Laboratory of Protein Metabolism, International Institute of Molecular and Cell Biology in Warsaw, Warsaw, Poland
| | - Wojciech Pokrzywa
- Laboratory of Protein Metabolism, International Institute of Molecular and Cell Biology in Warsaw, Warsaw, Poland
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14
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Teixeira SS, Graça MPF, Lucas J, Valente MA, Soares PIP, Lança MC, Vieira T, Silva JC, Borges JP, Jinga LI, Socol G, Mello Salgueiro C, Nunes J, Costa LC. Nanostructured LiFe 5O 8 by a Biogenic Method for Applications from Electronics to Medicine. Nanomaterials (Basel) 2021; 11:193. [PMID: 33466651 PMCID: PMC7828716 DOI: 10.3390/nano11010193] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 12/08/2020] [Revised: 01/04/2021] [Accepted: 01/07/2021] [Indexed: 01/23/2023]
Abstract
The physical properties of the cubic and ferrimagnetic spinel ferrite LiFe5O8 has made it an attractive material for electronic and medical applications. In this work, LiFe5O8 nanosized crystallites were synthesized by a novel and eco-friendly sol-gel process, by using powder coconut water as a mediated reaction medium. The dried powders were heat-treated (HT) at temperatures between 400 and 1000 °C, and their structure, morphology, electrical and magnetic characteristics, cytotoxicity, and magnetic hyperthermia assays were performed. The heat treatment of the LiFe5O8 powder tunes the crystallite sizes between 50 nm and 200 nm. When increasing the temperature of the HT, secondary phases start to form. The dielectric analysis revealed, at 300 K and 10 kHz, an increase of ε' (≈10 up to ≈14) with a tanδ almost constant (≈0.3) with the increase of the HT temperature. The cytotoxicity results reveal, for concentrations below 2.5 mg/mL, that all samples have a non-cytotoxicity property. The sample heat-treated at 1000 °C, which revealed hysteresis and magnetic saturation of 73 emu g-1 at 300 K, showed a heating profile adequate for magnetic hyperthermia applications, showing the potential for biomedical applications.
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Affiliation(s)
- Silvia Soreto Teixeira
- I3N and Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal; (S.S.T.); (M.P.F.G.); (J.L.); (M.A.V.)
| | - Manuel P. F. Graça
- I3N and Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal; (S.S.T.); (M.P.F.G.); (J.L.); (M.A.V.)
| | - José Lucas
- I3N and Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal; (S.S.T.); (M.P.F.G.); (J.L.); (M.A.V.)
| | - Manuel Almeida Valente
- I3N and Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal; (S.S.T.); (M.P.F.G.); (J.L.); (M.A.V.)
| | - Paula I. P. Soares
- CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal; (P.I.P.S.); (M.C.L.); (T.V.); (J.C.S.); (J.P.B.)
| | - Maria Carmo Lança
- CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal; (P.I.P.S.); (M.C.L.); (T.V.); (J.C.S.); (J.P.B.)
| | - Tânia Vieira
- CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal; (P.I.P.S.); (M.C.L.); (T.V.); (J.C.S.); (J.P.B.)
| | - Jorge Carvalho Silva
- CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal; (P.I.P.S.); (M.C.L.); (T.V.); (J.C.S.); (J.P.B.)
| | - João Paulo Borges
- CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal; (P.I.P.S.); (M.C.L.); (T.V.); (J.C.S.); (J.P.B.)
| | - Luiza-Izabela Jinga
- National Institute for Laser, Plasma and Radiation Physics, RO-077125 Magurele, Romania; (L.-I.J.); (G.S.)
| | - Gabriel Socol
- National Institute for Laser, Plasma and Radiation Physics, RO-077125 Magurele, Romania; (L.-I.J.); (G.S.)
| | - Cristiane Mello Salgueiro
- Veterinary Sciences Institute, Ceará State University, Fortaleza 60714-903, Brazil; (C.M.S.); (J.N.)
| | - José Nunes
- Veterinary Sciences Institute, Ceará State University, Fortaleza 60714-903, Brazil; (C.M.S.); (J.N.)
| | - Luís C. Costa
- I3N and Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal; (S.S.T.); (M.P.F.G.); (J.L.); (M.A.V.)
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15
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Zhao Y, Zhang M, Lu GL, Huang BX, Wang DW, Shao Y, Lu MJ. Hypoxic Preconditioning Enhances Cellular Viability and Pro-angiogenic Paracrine Activity: The Roles of VEGF-A and SDF-1a in Rat Adipose Stem Cells. Front Cell Dev Biol 2020; 8:580131. [PMID: 33330455 PMCID: PMC7719676 DOI: 10.3389/fcell.2020.580131] [Citation(s) in RCA: 6] [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: 07/04/2020] [Accepted: 11/04/2020] [Indexed: 12/19/2022] Open
Abstract
To achieve the full therapeutic potential of implanted adipose stem cells (ASCs) in vivo, it is crucial to improve the viability and pro-angiogenic properties of the stem cells. Here, we first simulated the conditions of ischemia and hypoxia using the in vitro oxygen-glucose deprivation (OGD) model and confirmed that hypoxic preconditioning of ASCs could provide improved protection against OGD and enhance ASC viability. Second, we assessed the effect of hypoxic preconditioning on pro-angiogenic potential of ASCs, with a particular focus on the role of vascular endothelial growth factor-A (VEGF-A) and stromal derived factor-1a (SDF-1a) paracrine activity in mediating angiogenesis. We found that the conditioned medium of ASCs (ASCCM) with hypoxic preconditioning enhanced angiogenesis by a series of angiogenesis assay models in vivo and in vitro through the upregulation of and a synergistic effect between VEGF-A and SDF-1a. Finally, to investigate the possible downstream mechanisms of VEGF/VEGFR2 and SDF-1a/CXCR4 axes-driven angiogenesis, we evaluated relevant protein kinases involved the signal transduction pathway of angiogenesis and showed that VEGF/VEGFR2 and SDF-1a/CXCR4 axes may synergistically promote angiogenesis by activating Akt. Collectively, our findings demonstrate that hypoxic preconditioning may constitute a promising strategy to enhance cellular viability and angiogenesis of transplanted ASCs, therein improving the success rate of stem cell-based therapies in tissue engineering.
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Affiliation(s)
- Yang Zhao
- Department of Urology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Department of Urology, Ruijin Hospital North, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Ming Zhang
- Department of Urology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Guo-Liang Lu
- Department of Urology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Department of Urology, Ruijin Hospital North, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Bao-Xing Huang
- Department of Urology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Department of Urology, Ruijin Hospital North, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Da-Wei Wang
- Department of Urology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Department of Urology, Ruijin Hospital North, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yuan Shao
- Department of Urology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Department of Urology, Ruijin Hospital North, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Mu-Jun Lu
- Department of Urology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
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16
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Dayeh MA, Livadiotis G, Aminian F, Cheng KH, Roberts JL, Viswasam N, Elaydi S. Effects of Cholesterol in Stress-Related Neuronal Death-A Statistical Analysis Perspective. Int J Mol Sci 2020; 21:ijms21082905. [PMID: 32326309 PMCID: PMC7215582 DOI: 10.3390/ijms21082905] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 04/16/2020] [Accepted: 04/17/2020] [Indexed: 11/16/2022] Open
Abstract
The association between plasma cholesterol levels and the development of dementia continues to be an important topic of discussion in the scientific community, while the results in the literature vary significantly. We study the effect of reducing oxidized neuronal cholesterol on the lipid raft structure of plasma membrane. The levels of plasma membrane cholesterol were reduced by treating the intact cells with methyl-ß-cyclodextrin (MßCD). The relationship between the cell viability with varying levels of MßCD was then examined. The viability curves are well described by a modified form of the empirical Gompertz law of mortality. A detailed statistical analysis is performed on the fitting results, showing that increasing MßCD concentration has a minor, rather than significant, effect on the cellular viability. In particular, the dependence of viability on MßCD concentration was found to be characterized by a ~25% increase per 1 μM of MßCD concentration.
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Affiliation(s)
- Maher A. Dayeh
- Space Science and Engineering Division, Southwest Research Institute, San Antonio, TX 78238, USA;
- Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, TX 78249, USA
- Correspondence:
| | - George Livadiotis
- Space Science and Engineering Division, Southwest Research Institute, San Antonio, TX 78238, USA;
| | - Farzan Aminian
- Neuroscience Program, Departments of Biology, Mathematics, Engineering and Physics & Astronomy, Trinity University, San Antonio, TX 78212, USA; (F.A.); (K.H.C.); (J.L.R.); (N.V.); (S.E.)
| | - Kwan H. Cheng
- Neuroscience Program, Departments of Biology, Mathematics, Engineering and Physics & Astronomy, Trinity University, San Antonio, TX 78212, USA; (F.A.); (K.H.C.); (J.L.R.); (N.V.); (S.E.)
| | - James L. Roberts
- Neuroscience Program, Departments of Biology, Mathematics, Engineering and Physics & Astronomy, Trinity University, San Antonio, TX 78212, USA; (F.A.); (K.H.C.); (J.L.R.); (N.V.); (S.E.)
| | - Nikita Viswasam
- Neuroscience Program, Departments of Biology, Mathematics, Engineering and Physics & Astronomy, Trinity University, San Antonio, TX 78212, USA; (F.A.); (K.H.C.); (J.L.R.); (N.V.); (S.E.)
| | - Saber Elaydi
- Neuroscience Program, Departments of Biology, Mathematics, Engineering and Physics & Astronomy, Trinity University, San Antonio, TX 78212, USA; (F.A.); (K.H.C.); (J.L.R.); (N.V.); (S.E.)
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Liao C, Li Y, Tjong SC. Antibacterial Activities of Aliphatic Polyester Nanocomposites with Silver Nanoparticles and/or Graphene Oxide Sheets. Nanomaterials (Basel) 2019; 9:E1102. [PMID: 31374855 PMCID: PMC6724040 DOI: 10.3390/nano9081102] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [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: 07/05/2019] [Revised: 07/21/2019] [Accepted: 07/25/2019] [Indexed: 12/18/2022]
Abstract
Aliphatic polyesters such as poly(lactic acid) (PLA), polycaprolactone (PCL) and poly(lactic-co-glycolic) acid (PLGA) copolymers have been widely used as biomaterials for tissue engineering applications including: bone fixation devices, bone scaffolds, and wound dressings in orthopedics. However, biodegradable aliphatic polyesters are prone to bacterial infections due to the lack of antibacterial moieties in their macromolecular chains. In this respect, silver nanoparticles (AgNPs), graphene oxide (GO) sheets and AgNPs-GO hybrids can be used as reinforcing nanofillers for aliphatic polyesters in forming antimicrobial nanocomposites. However, polymeric matrix materials immobilize nanofillers to a large extent so that they cannot penetrate bacterial membrane into cytoplasm as in the case of colloidal nanoparticles or nanosheets. Accordingly, loaded GO sheets of aliphatic polyester nanocomposites have lost their antibacterial functions such as nanoknife cutting, blanket wrapping and membrane phospholipid extraction. In contrast, AgNPs fillers of polyester nanocomposites can release silver ions for destroying bacterial cells. Thus, AgNPs fillers are more effective than loaded GO sheets of polyester nanocomposiites in inhibiting bacterial infections. Aliphatic polyester nanocomposites with AgNPs and AgNPs-GO fillers are effective to kill multi-drug resistant bacteria that cause medical device-related infections.
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Affiliation(s)
- Chengzhu Liao
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Yuchao Li
- Department of Materials Science and Engineering, Liaocheng University, Liaocheng 252000, China
| | - Sie Chin Tjong
- Department of Physics, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong 999077, China.
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18
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Yamauchi S, Shoji Y, Nishimoto A, Uzura M, Nishiwaki H, Nishi K, Sugahara T. Design of 92 New 9-Norlignan Derivatives and Their Effect on Cell Viabilities of Cancer and Insect Cells. J Agric Food Chem 2019; 67:7880-7885. [PMID: 31250636 DOI: 10.1021/acs.jafc.9b03171] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Ninety-two new 9-norlignan derivatives containing more effective compounds against both cancer and insect cells than lead compounds were synthesized. Against HeLa cells, 7-(3,4-dimethoxyphenyl)-7'-(3'-hydroxy-4'-methoxyphenyl) derivative 63 (IC50 = 0.9 ± 0.2 μM) was to be around 6-fold more potent than lead compound 5. Moreover, against HL-60 cells, 7-(4-trifluoromethylphenyl)-7'-(3'/4'-hydroxyphenyl) derivatives 78 and 79 (IC50 = 2.2 ± 0.4 μM and 2.4 ± 0.6 μM) were 3-fold more potent than lead compound 5. Furthermore, against Sf9 cells from the common cutworm, the 7-(4-trifluoromethylphenyl) derivatives bearing electron-withdrawing groups 76-96 showed a wider range of activity (around 20-fold difference), giving valuable information on the structure-activity relationship. The 7-(4-trifluoromethylphenyl)-7'-(2'/3'-hydroxyphenyl) derivatives 77 and 78 (IC50 = 4.7 ± 0.6 μM and 4.9 ± 0.9 μM) had around 2-fold higher activity against Sf9 cells than lead compound 5. The 7-(4-trifluoromethylphenyl)-7'-(3'-hydroxyphenyl) derivative 78 was also effective against mosquito NIAS-AcAl-2 cells with an IC50 value of 5.4 ± 0.3.
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Affiliation(s)
- Satoshi Yamauchi
- Graduate School of Agriculture , Ehime University , 3-5-7 Tarumi , Matsuyama , Ehime 790-8566 , Japan
| | - Yuriko Shoji
- Graduate School of Agriculture , Ehime University , 3-5-7 Tarumi , Matsuyama , Ehime 790-8566 , Japan
| | - Asuka Nishimoto
- Graduate School of Agriculture , Ehime University , 3-5-7 Tarumi , Matsuyama , Ehime 790-8566 , Japan
| | - Mone Uzura
- Graduate School of Agriculture , Ehime University , 3-5-7 Tarumi , Matsuyama , Ehime 790-8566 , Japan
| | - Hisashi Nishiwaki
- Graduate School of Agriculture , Ehime University , 3-5-7 Tarumi , Matsuyama , Ehime 790-8566 , Japan
| | - Kosuke Nishi
- Graduate School of Agriculture , Ehime University , 3-5-7 Tarumi , Matsuyama , Ehime 790-8566 , Japan
| | - Takuya Sugahara
- Graduate School of Agriculture , Ehime University , 3-5-7 Tarumi , Matsuyama , Ehime 790-8566 , Japan
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19
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Marișca OT, Leopold N. Anisotropic Gold Nanoparticle-Cell Interactions Mediated by Collagen. Materials (Basel) 2019; 12:E1131. [PMID: 30959932 DOI: 10.3390/ma12071131] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 04/01/2019] [Accepted: 04/04/2019] [Indexed: 11/17/2022]
Abstract
Gold nanoparticles (AuNPs) are the groundwork of a large variety of applications in the biomedical field. Further development and a better understanding of this versatile platform will lead to an expansion of potential applications. In this study, we propose a facile synthesis of AuNPs using hydrogen peroxide as a reducing agent and collagen as a stabilizing agent. Our synthetic approach results in "raspberry"-like AuNPs with a mean diameter of 60 nm, as revealed by electron microscopy. The optical properties of the AuNPs were assessed by UV-Vis and surface-enhanced Raman scattering (SERS), and their stability and in vitro cytotoxicity were evaluated as well. HeLa cell viability values were only modestly affected compared to control, with the highest concentration tested displaying a 20% decrease in cellular viability. The dose-dependent cellular internalization in the 20⁻60 nM range indicate the highest internalization rate at 60 nM and uptake values as high as 35%. This result correlated well with the viability results. These type of anisotropic AuNPs are proposed for biomedical applications such as hyperthermia, contrast agents or imaging. Therefore, our findings offer a platform for potential biological applications such as sensing and imaging, due to their unique physico-chemical features.
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Torres-Hernández YG, Ortega-Díaz GM, Téllez-Jurado L, Castrejón-Jiménez NS, Altamirano-Torres A, García-Pérez BE, Balmori-Ramírez H. Biological Compatibility of a Polylactic Acid Composite Reinforced with Natural Chitosan Obtained from Shrimp Waste. Materials (Basel) 2018; 11:ma11081465. [PMID: 30126167 PMCID: PMC6119920 DOI: 10.3390/ma11081465] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [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: 05/14/2018] [Revised: 06/01/2018] [Accepted: 06/01/2018] [Indexed: 01/04/2023]
Abstract
The aim of this work is to evaluate the effect of chitosan content (1, 3 and 5 wt %) dispersed in polylactic acid (PLA) on the structure and properties of composites. Also, the hydrolytic degradation, and the cell viability and adhesion of human MG-63 osteoblasts are analyzed to determine the composites’ suitability for use in tissue engineering. For the manufacture of the materials, natural chitosan was extracted chemically from shrimp exoskeleton. The composites were fabricated by extrusion, because it is a low-cost process, it is reproducible, and it does not compromise the biocompatibility of the materials. FT-IR and XRD show that the chitosan does not change the polymer structure, and interactions between the composite components are discarded. In vitro degradation tests show that the composites do not induce significant pH changes in phosphate buffer solution due to their low susceptibility to hydrolytic degradation. The adhesion and morphological characteristics of the osteoblasts are evaluated using confocal microscopy and scanning electron microscopy. The cell viability is determined by the MTT assay. Osteoblasts adhesion is observed on the surface of PLA and composites. A higher amount of chitosan, higher number of cells with osteoblastic morphology, and mineralized nodules are observed on the composite surface. The highest metabolic activity is evidenced at 21 days. The results suggest that the Polylactic acid/chitosan composites are potentially suitable for use as a biomaterial.
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Affiliation(s)
- Yaret Gabriela Torres-Hernández
- Department of Metallurgical and Materials Engineering, Escuela Superior de Ingeniería Química e Industrias Extractivas (ESIQIE), Instituto Politécnico Nacional, Unidad Profesional Adolfo López Mateos (UPALM), Av. Instituto Politécnico Nacional S/N, C.P., Ciudad de México 07738, Mexico.
| | - Gloria Michel Ortega-Díaz
- Escuela Nacional de Ciencias Biológicas (ENCB), Department of Microbiology, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala S/N, Casco de Santo Tomás. C.P., Ciudad de México 11340, Mexico.
| | - Lucía Téllez-Jurado
- Department of Metallurgical and Materials Engineering, Escuela Superior de Ingeniería Química e Industrias Extractivas (ESIQIE), Instituto Politécnico Nacional, Unidad Profesional Adolfo López Mateos (UPALM), Av. Instituto Politécnico Nacional S/N, C.P., Ciudad de México 07738, Mexico.
| | - Nayeli Shantal Castrejón-Jiménez
- Escuela Nacional de Ciencias Biológicas (ENCB), Department of Microbiology, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala S/N, Casco de Santo Tomás. C.P., Ciudad de México 11340, Mexico.
| | - Alejandro Altamirano-Torres
- Department of Materials, Universidad Autónoma Metropolitana-Azcapotzalco, San Pablo No.180, Col. Reynosa-Tamaulipas, C.P., Ciudad de México 02200, Mexico.
| | - Blanca Estela García-Pérez
- Escuela Nacional de Ciencias Biológicas (ENCB), Department of Microbiology, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala S/N, Casco de Santo Tomás. C.P., Ciudad de México 11340, Mexico.
| | - Heberto Balmori-Ramírez
- Department of Metallurgical and Materials Engineering, Escuela Superior de Ingeniería Química e Industrias Extractivas (ESIQIE), Instituto Politécnico Nacional, Unidad Profesional Adolfo López Mateos (UPALM), Av. Instituto Politécnico Nacional S/N, C.P., Ciudad de México 07738, Mexico.
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Stenhouse M, Zilm P, Ratnayake J, Cathro P. Investigation of the effect of rapid and slow external pH increases on Enterococcus faecalis biofilm grown on dentine. Aust Dent J 2018; 63:224-230. [PMID: 29327470 DOI: 10.1111/adj.12582] [Citation(s) in RCA: 2] [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] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/29/2017] [Indexed: 11/28/2022]
Abstract
BACKGROUND Calcium hydroxide is a common endodontic medicament and has an antimicrobial effect by increasing the localized pH within the root canal. However, Enterococcus faecalis has shown some resistance to calcium hydroxide. METHODS A flow cell apparatus was used to grow an E. faecalis biofilm on dentine discs. Following 4 weeks growth in Todd Hewitt Broth, flow cells were exposed to either a rapid or slow increase to pH 11.5 or 12.5. Cellular viability was determined using serial plating and the number of colony-forming units was normalized against the cellular protein content. Scanning electron microscopy was carried out to qualitatively observe the effects of the different rates of pH increase. RESULTS A significant difference in viability between the pH rapid and slow groups was not shown in this study. Compared with pH 11.5 solutions, pH 12.5 solutions were more effective at killing bacteria although some E. faecalis still survived. CONCLUSIONS Enterococcus faecalis did not adapt and develop a greater resistance to high pH following a slow rise in pH compared with a rapid rise in pH. As expected, pH 12.5 was more effective in reducing bacterial numbers compared with pH 11.5 although E. faecalis was not completely eliminated.
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Affiliation(s)
- M Stenhouse
- Adelaide Dental School, Faculty of Health and Medical Science, The University of Adelaide, Adelaide, South Australia, Australia
| | - P Zilm
- Adelaide Dental School, Faculty of Health and Medical Science, The University of Adelaide, Adelaide, South Australia, Australia
| | - J Ratnayake
- Faculty of Dentistry, Dunedin, Otago, Australia
| | - P Cathro
- Adelaide Dental School, Faculty of Health and Medical Science, The University of Adelaide, Adelaide, South Australia, Australia.,Faculty of Dentistry, Dunedin, Otago, Australia
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González-Chávez MM, Ramos-Velázquez CS, Serrano-Vega R, Pérez-González C, Sánchez-Mendoza E, Pérez-Gutiérrez S. Anti-inflammatory activity of standardized dichloromethane extract of Salvia connivens on macrophages stimulated by LPS. Pharm Biol 2017; 55:1467-1472. [PMID: 28347190 PMCID: PMC6130608 DOI: 10.1080/13880209.2017.1305423] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [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: 06/22/2016] [Revised: 01/09/2017] [Accepted: 03/05/2017] [Indexed: 05/27/2023]
Abstract
CONTEXT A previous study demonstrated that the chloroform extract of Salvia connivens Epling (Lamiaceae) has anti-inflammatory activity. OBJECTIVE Identification of the active components in the dicholorometane extract (DESC), and, standardization of the extract based in ursolic acid. MATERIAL AND METHODS DESC was prepared by percolation with dichlromethane and after washed with hot hexane, its composition was determined by CG-MS and NMR, and standardized by HPLC. The anti-inflammatory activity was tested on acute TPA-induced mouse ear oedema at doses of 2.0 mg/ear. The cell viability of macrophages was evaluated by MTT method, and pro- and anti-inflammatory interleukin levels were measured using an ELISA kit. RESULTS Ursolic acid, oleanolic acid, dihydroursolic acid and eupatorin were identified in DESC, which was standardized based on the ursolic acid concentration (126 mg/g). The anti-inflammatory activities of DESC, the acid mixture, and eupatorin (2 mg/ear) were 60.55, 57.20 and 56.40% inhibition, respectively, on TPA-induced ear oedema. The IC50 of DESC on macrophages was 149.4 μg/mL. DESC (25 μg/mL) significantly reduced TNF-α (2.0-fold), IL-1β (2.2-fold) and IL-6 (2.0-fold) in macrophages stimulated with LPS and increased the production of IL-10 (1.9-fold). DISCUSSION Inflammation is a basic response to injuries, and macrophages are involved in triggering inflammation. Macrophage cells exhibit a response to LPS, inducing inflammatory mediators, and DESC inhibits the biosynthesis of the pro-inflammatory and promote anti-inflammatory cytokines. CONCLUSION DESC has an anti-inflammatory effect; reduced the levels of IL-1β, Il-6 and TNF-α; and increases IL-10 in macrophages stimulated with LPS. Ursolic acid is a good phytochemical marker.
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Affiliation(s)
- Marco Martín González-Chávez
- Facultad de Ciencias Químicas, Centro de Investigación y Estudios de Posgrado, Universidad Autónoma de San Luis Potosí, San Luis Potosí, SLP, México
| | - Cinthia Saraí Ramos-Velázquez
- Facultad de Ciencias Químicas, Centro de Investigación y Estudios de Posgrado, Universidad Autónoma de San Luis Potosí, San Luis Potosí, SLP, México
| | - Roberto Serrano-Vega
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana – Xochimilco, Ciudad de México, México
| | - Cuauhtemoc Pérez-González
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana – Xochimilco, Ciudad de México, México
| | - Ernesto Sánchez-Mendoza
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana – Xochimilco, Ciudad de México, México
| | - Salud Pérez-Gutiérrez
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana – Xochimilco, Ciudad de México, México
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Machado AC, Souza LP, Saldanha LL, Pieroni LG, Matos AA, Oliveira FAD, Vilegas W, Damante CA, Dokkedal AL, Oliveira RCD. "Aroeira" (Myracrodruon urundeuva) methanol extract: the relationship between chemical compounds and cellular effects. Pharm Biol 2016; 54:2737-2741. [PMID: 27226237 DOI: 10.1080/13880209.2016.1182555] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
CONTEXT "Aroeira" [Myracrodruon urundeuva Allemão (Anacardiaceae)] is a tree whose leaves have been studied for therapeutic purposes in medicine and dentistry. OBJECTIVE The study chemically identifies the leaf extract of aroeira and determines its effect on human gingival fibroblasts. MATERIALS AND METHODS An 80% methanol leave extract was obtained by maceration and chemically identified through flow-injection analysis-electrospray ionization-ion trap-tandem mass spectrometry (FIA-ESI-IT-MSn). Cytotoxicity of the aroeira's methanol extract was evaluated in lineage of fibroblasts. Adherent cells were treated with different concentrations of aroeira's methanol extract in the medium: 0.1, 1, 10, 100 and 1000 μg/mL. Control cells were cultivated in the medium only. Analyses were done at 24, 48, 72 and 96 h of culture by neutral red assay; and at 24, 48 and 96 h by crystal violet assay. RESULTS FIA-ESI-IT-MS analysis determined the presence of compounds, for the first time in the species: quercetin-O-glucuronide and quercetin-O-deoxyhexose-O-glucose in the extract. On one hand, neutral red and crystal violet assay showed a reduction (to 50% up until 100%) of cellular viability of groups of 100 and 1000 μg/mL compared with control at 96 h (p < 0.05). On the other hand, lower concentrations (0.1; 1 and 10 μg/mL) of the extract were similar to that of the control at 96 h (p < 0.05), in general. CONCLUSIONS In view of the results, we can conclude that the extract of aroeira presents tannins and flavonoids. Furthermore, the extract is capable of modulating the viability of human gingival fibroblasts according to its concentration.
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Affiliation(s)
- Alessandra Cury Machado
- a Department of Biological Sciences , Bauru School of Dentistry, University of São Paulo , Bauru , Brazil
| | | | - Luiz Leonardo Saldanha
- b Department of Biologic Science , School of Science, UNESP , Bauru , Brazil
- c Department of Botany , Bioscience Institute, UNESP , Botucatu , Brazil
| | - Laís Goyos Pieroni
- b Department of Biologic Science , School of Science, UNESP , Bauru , Brazil
- c Department of Botany , Bioscience Institute, UNESP , Botucatu , Brazil
| | - Adriana Arruda Matos
- a Department of Biological Sciences , Bauru School of Dentistry, University of São Paulo , Bauru , Brazil
| | - Flávia Amadeu de Oliveira
- a Department of Biological Sciences , Bauru School of Dentistry, University of São Paulo , Bauru , Brazil
| | - Wagner Vilegas
- d Laboratory of Conservation and Biodiversity, Biosciences Institute , Campus Paulista Coast - Unity São Vicente, UNESP , São Vicente , Brazil
| | - Carla Andreotti Damante
- e Department of Prosthodontics , Bauru School of Dentistry, University of São Paulo , Bauru , SP , Brazil
| | - Anne Lígia Dokkedal
- b Department of Biologic Science , School of Science, UNESP , Bauru , Brazil
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Mullins BJ, Kicic A, Ling KM, Mead-Hunter R, Larcombe AN. Biodiesel exhaust-induced cytotoxicity and proinflammatory mediator production in human airway epithelial cells. Environ Toxicol 2016; 31:44-57. [PMID: 25045158 DOI: 10.1002/tox.22020] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [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: 03/10/2014] [Revised: 06/15/2014] [Accepted: 06/17/2014] [Indexed: 06/03/2023]
Abstract
Increasing use of biodiesel has prompted research into the potential health effects of biodiesel exhaust exposure. Few studies directly compare the health consequences of mineral diesel, biodiesel, or blend exhaust exposures. Here, we exposed human epithelial cell cultures to diluted exhaust generated by the combustion of Australian ultralow-sulfur-diesel (ULSD), unprocessed canola oil, 100% canola biodiesel (B100), and a blend of 20% canola biodiesel mixed with 80% ULSD. The physicochemical characteristics of the exhaust were assessed and we compared cellular viability, apoptosis, and levels of interleukin (IL)-6, IL-8, and Regulated on Activation, Normal T cell Expressed and Secreted (RANTES) in exposed cultured cells. Different fuel types produced significantly different amounts of exhaust gases and different particle characteristics. All exposures resulted in significant apoptosis and loss of viability when compared with control, with an increasing proportion of biodiesel being correlated with a decrease in viability. In most cases, exposure to exhaust resulted in an increase in mediator production, with the greatest increases most often in response to B100. Exposure to pure canola oil (PCO) exhaust did not increase mediator production, but resulted in a significant decrease in IL-8 and RANTES in some cases. Our results show that canola biodiesel exhaust exposure elicits inflammation and reduces viability of human epithelial cell cultures in vitro when compared with ULSD exhaust exposure. This may be related to an increase in particle surface area and number in B100 exhaust when compared with ULSD exhaust. Exposure to PCO exhaust elicited the greatest loss of cellular viability, but virtually no inflammatory response, likely due to an overall increase in average particle size.
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Affiliation(s)
- Benjamin J Mullins
- Fluid Dynamics Research Group, Curtin University, GPO Box U1987, Perth, Western Australia, 6845, Australia
- School of Public Health, Faculty of Health Sciences, Curtin University, GPO Box U1987, Perth, WA, Australia
| | - Anthony Kicic
- Telethon Kids Institute, University of Western Australia, Subiaco, Western Australia, 6008, Australia
- Department of Respiratory Medicine, Princess Margaret Hospital for Children, Perth, Western Australia, 6001, Australia
- School of Paediatrics and Child Health, University of Western Australia, Nedlands, Western Australia, 6009, Australia
- Centre for Cell Therapy and Regenerative Medicine, School of Medicine and Pharmacology, The University of Western Australia, Nedlands, 6009, Western Australia, Australia
| | - Kak-Ming Ling
- Telethon Kids Institute, University of Western Australia, Subiaco, Western Australia, 6008, Australia
| | - Ryan Mead-Hunter
- Fluid Dynamics Research Group, Curtin University, GPO Box U1987, Perth, Western Australia, 6845, Australia
- School of Public Health, Faculty of Health Sciences, Curtin University, GPO Box U1987, Perth, WA, Australia
| | - Alexander N Larcombe
- Telethon Kids Institute, University of Western Australia, Subiaco, Western Australia, 6008, Australia
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De Bona KS, Bonfanti G, Bitencourt PER, da Silva TP, Borges RM, Boligon A, Pigatto A, Athayde ML, Moretto MB. Protective effect of gallic acid and Syzygium cumini extract against oxidative stress-induced cellular injury in human lymphocytes. Drug Chem Toxicol 2015; 39:256-63. [PMID: 26364973 DOI: 10.3109/01480545.2015.1084631] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [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: 11/13/2022]
Abstract
CONTEXT Syzygium cumini (Myrtaceae) presents antioxidant, anti-inflammatory, hypoglycemic and antibacterial effects; however, the cellular and molecular mechanisms of action in the immune system are not yet completely elucidated. OBJECTIVE This study evaluates the in vitro effect of gallic acid and aqueous S. cumini leaf extract (ASc) on adenosine deaminase (ADA) and dipeptidyl peptidase IV (DPP-IV) activities, cell viability and oxidative stress parameters in lymphocytes exposed to 2, 2'-azobis-2-amidinopropane dihydrochloride (AAPH). MATERIALS AND METHODS Lymphocytes were incubated with ASc (100 and 500 µg/ml) and gallic acid (50 and 200 µM) at 37 °C for 30 min followed by incubation with AAPH (1 mM) at 37 °C for 2 h. After the incubation time, the lymphocytes were used for determinations of ADA, DPP-IV and lactate dehydrogenase (LDH) activities, lipid peroxidation, protein thiol (P-SH) group levels and cellular viability by colorimetric methods. RESULTS (i) HPLC fingerprinting of ASc revealed the presence of catechin, epicatechin, rutin, quercitrin, isoquercitrin, quercetin, kaempferol and chlorogenic, caffeic, gallic and ellagic acids; (ii) for the first time, ASc reduced the AAPH-induced increase in ADA activity, but no effect was observed on DPP-IV activity; (iii) ASc increased P-SH groups and cellular viability and decreased LDH activity, but was not able to reduce the AAPH-induced lipid peroxidation; (iv) gallic acid showed less protective effects than ASc. DISCUSSION AND CONCLUSION ASc affects the purinergic system and may modulate adenosine levels, indicating that the extract of this plant exhibits immunomodulatory properties. ASc also may potentially prevent the cellular injury induced by oxidative stress, highlighting its cytoprotective effects.
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Affiliation(s)
- Karine Santos De Bona
- a Postgraduate Program in Pharmacology, Department of Clinical and Toxicology Analysis, Center of Health Sciences, Federal University of Santa Maria (UFSM) , Santa Maria , RS , Brazil
| | - Gabriela Bonfanti
- a Postgraduate Program in Pharmacology, Department of Clinical and Toxicology Analysis, Center of Health Sciences, Federal University of Santa Maria (UFSM) , Santa Maria , RS , Brazil
| | | | - Thainan Paz da Silva
- b Postgraduate Program in Pharmaceutical Sciences, UFSM , Santa Maria , Brazil , and
| | | | - Aline Boligon
- b Postgraduate Program in Pharmaceutical Sciences, UFSM , Santa Maria , Brazil , and
| | - Aline Pigatto
- c Franciscan University Center, UNIFRA , Santa Maria , RS , Brazil
| | | | - Maria Beatriz Moretto
- a Postgraduate Program in Pharmacology, Department of Clinical and Toxicology Analysis, Center of Health Sciences, Federal University of Santa Maria (UFSM) , Santa Maria , RS , Brazil .,b Postgraduate Program in Pharmaceutical Sciences, UFSM , Santa Maria , Brazil , and
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Dória GAA, Santos AR, Bittencourt LS, Bortolin RC, Menezes PP, Vasconcelos BS, Souza RO, Fonseca MJV, Santos ADC, Saravanan S, Silva FA, Gelain DP, Moreira JCF, Prata APN, Quintans-Júnior LJ, Araújo AAS. Redox-Active Profile Characterization of Remirea maritima Extracts and Its Cytotoxic Effect in Mouse Fibroblasts (L929) and Melanoma (B16F10) Cells. Molecules 2015; 20:11699-718. [PMID: 26121396 PMCID: PMC6331889 DOI: 10.3390/molecules200711699] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [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: 12/08/2014] [Revised: 05/06/2015] [Accepted: 05/12/2015] [Indexed: 12/26/2022] Open
Abstract
Remirea maritima is a tropical plant with a reticulated root system belonging to the family Cyperaceae, also known to have biologically active secondary metabolites. However, very few data on R. maritima’s biological actions are available and there are no reports regarding the redox-active profile of this plant. In this study, we examined the total phenolic content of Remirea maritima hydroalcoholic (RMHA) extracts, redox properties against different reactive species generated in vitro and their cytotoxic effect against fibroblasts (L929) and melanoma (B16F10) cells. Total reactive antioxidant potential index (TRAP) and total antioxidant reactivity (TAR) results revealed that RMHA at all concentrations tested showed significant antioxidant capacity. RMHA was also effective against hydroxyl radical formation, reduction of Fe3+ to Fe2+ and in scavenging nitric oxide (NO) radicals. In vitro, the level of lipid peroxidation was reduced by RMHA extract and the data showed significant oxidative damage protection. The RMHA cytotoxicity was evaluated by a neutral red assay in fibroblast (L929) and melanome (B16F10) cells. The obtained results showed that the RMHA (40 and 80 µg/mL, respectively) reduced 70% of the viable cells. In conclusion, this study represents the first report regarding the antioxidant and anti-proliferative potential of R. maritima against B16F10 melanoma cells.
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Affiliation(s)
- Grace Anne A. Dória
- Departament of Pharmacy, Federal University of Sergipe, Av. Marechal Rondon, Jardim Rosa Elze, 49100-000 São Cristóvão, Sergipe, Brazil; E-Mails: (G.A.A.D.); (A.R.S.); (P.P.M.); (B.S.V.); (S.S.); (F.A.S.)
| | - Anderson R. Santos
- Departament of Pharmacy, Federal University of Sergipe, Av. Marechal Rondon, Jardim Rosa Elze, 49100-000 São Cristóvão, Sergipe, Brazil; E-Mails: (G.A.A.D.); (A.R.S.); (P.P.M.); (B.S.V.); (S.S.); (F.A.S.)
| | - Leonardo S. Bittencourt
- Departament of Biochemistry, Federal University of Rio Grande do Sul, 90040-060 Porto Alegre, Rio Grande do Sul, Brazil; E-Mails: (L.S.B.); (R.C.B.); (D.P.G.); (J.C.F.M.)
| | - Rafael C. Bortolin
- Departament of Biochemistry, Federal University of Rio Grande do Sul, 90040-060 Porto Alegre, Rio Grande do Sul, Brazil; E-Mails: (L.S.B.); (R.C.B.); (D.P.G.); (J.C.F.M.)
| | - Paula P. Menezes
- Departament of Pharmacy, Federal University of Sergipe, Av. Marechal Rondon, Jardim Rosa Elze, 49100-000 São Cristóvão, Sergipe, Brazil; E-Mails: (G.A.A.D.); (A.R.S.); (P.P.M.); (B.S.V.); (S.S.); (F.A.S.)
| | - Bruno S. Vasconcelos
- Departament of Pharmacy, Federal University of Sergipe, Av. Marechal Rondon, Jardim Rosa Elze, 49100-000 São Cristóvão, Sergipe, Brazil; E-Mails: (G.A.A.D.); (A.R.S.); (P.P.M.); (B.S.V.); (S.S.); (F.A.S.)
| | - Rebeca O. Souza
- Departament of Pharmacy, University of São Paulo, 14040-900 Ribeirão Preto, São Paulo, Brazil; E-Mails: (R.O.S.); (M.J.V.F.)
| | - Maria José V. Fonseca
- Departament of Pharmacy, University of São Paulo, 14040-900 Ribeirão Preto, São Paulo, Brazil; E-Mails: (R.O.S.); (M.J.V.F.)
| | - Alan Diego C. Santos
- Departament of Physiology and Chemistry, Federal University of Sergipe, 49100-000 São Cristóvão, Sergipe, Brazil; E-Mails: (A.D.C.S.); (L.J.Q.-J.)
| | - Shanmugam Saravanan
- Departament of Pharmacy, Federal University of Sergipe, Av. Marechal Rondon, Jardim Rosa Elze, 49100-000 São Cristóvão, Sergipe, Brazil; E-Mails: (G.A.A.D.); (A.R.S.); (P.P.M.); (B.S.V.); (S.S.); (F.A.S.)
| | - Francilene A. Silva
- Departament of Pharmacy, Federal University of Sergipe, Av. Marechal Rondon, Jardim Rosa Elze, 49100-000 São Cristóvão, Sergipe, Brazil; E-Mails: (G.A.A.D.); (A.R.S.); (P.P.M.); (B.S.V.); (S.S.); (F.A.S.)
| | - Daniel P. Gelain
- Departament of Biochemistry, Federal University of Rio Grande do Sul, 90040-060 Porto Alegre, Rio Grande do Sul, Brazil; E-Mails: (L.S.B.); (R.C.B.); (D.P.G.); (J.C.F.M.)
| | - José Cláudio F. Moreira
- Departament of Biochemistry, Federal University of Rio Grande do Sul, 90040-060 Porto Alegre, Rio Grande do Sul, Brazil; E-Mails: (L.S.B.); (R.C.B.); (D.P.G.); (J.C.F.M.)
| | - Ana Paula N. Prata
- Departament of Biology, Federal University of Sergipe, 49100-000 São Cristóvão, Sergipe, Brazil; E-Mail:
| | - Lucindo J. Quintans-Júnior
- Departament of Physiology and Chemistry, Federal University of Sergipe, 49100-000 São Cristóvão, Sergipe, Brazil; E-Mails: (A.D.C.S.); (L.J.Q.-J.)
| | - Adriano A. S. Araújo
- Departament of Pharmacy, Federal University of Sergipe, Av. Marechal Rondon, Jardim Rosa Elze, 49100-000 São Cristóvão, Sergipe, Brazil; E-Mails: (G.A.A.D.); (A.R.S.); (P.P.M.); (B.S.V.); (S.S.); (F.A.S.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +55-79-21056841; Fax: +55-79-21056827
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Liao CZ, Wong HM, Yeung KWK, Tjong SC. The development, fabrication, and material characterization of polypropylene composites reinforced with carbon nanofiber and hydroxyapatite nanorod hybrid fillers. Int J Nanomedicine 2014; 9:1299-310. [PMID: 24648729 PMCID: PMC3956629 DOI: 10.2147/ijn.s58332] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
This study focuses on the design, fabrication, microstructural and property characterization, and biocompatibility evaluation of polypropylene (PP) reinforced with carbon nanofiber (CNF) and hydroxyapatite nanorod (HANR) fillers. The purpose is to develop advanced PP/CNF–HANR hybrids with good mechanical behavior, thermal stability, and excellent biocompatibility for use as craniofacial implants in orthopedics. Several material-examination techniques, including X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy, thermogravimetric analysis, differential scanning calorimetry, tensile tests, and impact measurement are used to characterize the microstructural, mechanical, and thermal properties of the hybrids. Furthermore, osteoblastic cell cultivation and colorimetric assay are also employed for assessing their viability on the composites. The CNF and HANR filler hybridization yields an improvement in Young’s modulus, impact strength, thermal stability, and biocompatibility of PP. The PP/2% CNF–20% HANR hybrid composite is found to exhibit the highest elastic modulus, tensile strength, thermal stability, and biocompatibility.
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Affiliation(s)
- Cheng Zhu Liao
- Department of Materials Science and Engineering, South University of Science and Technology of China, Shenzhen, People's Republic of China ; Department of Physics and Materials Science, City University of Hong Kong, Hong Kong
| | - Hoi Man Wong
- Department of Orthopedics and Traumatology, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong
| | - Kelvin Wai Kwok Yeung
- Department of Orthopedics and Traumatology, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong
| | - Sie Chin Tjong
- Department of Physics and Materials Science, City University of Hong Kong, Hong Kong
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Abstract
Single cell patterning holds important implications for biology, biochemistry, biotechnology, medicine, and bioinformatics. The challenge for single cell patterning is to produce small islands hosting only single cells and retaining their viability for a prolonged period of time. This study demonstrated a surface engineering approach that uses a covalently bound short peptide as a mediator to pattern cells with improved single cell adhesion and prolonged cellular viability on gold patterned SiO2 substrates. The underlying hypothesis is that cell adhesion is regulated by the type, availability, and stability of effective cell adhesion peptides, and thus covalently bound short peptides would promote cell spreading and, thus, single cell adhesion and viability. The effectiveness of this approach and the underlying mechanism for the increased probability of single cell adhesion and prolonged cell viability by short peptides were studied by comparing cellular behavior of human umbilical cord vein endothelial cells on three model surfaces whose gold electrodes were immobilized with fibronectin, physically adsorbed Arg-Glu-Asp-Val-Tyr, and covalently bound Lys-Arg-Glu-Asp-Val-Tyr, respectively. The surface chemistry and binding properties were characterized by reflectance Fourier transform infrared spectroscopy. Both short peptides were superior to fibronectin in producing adhesion of only single cells, whereas the covalently bound peptide also reduced apoptosis and necrosis of adhered cells. Controlling cell spreading by peptide binding domains to regulate apoptosis and viability represents a fundamental mechanism in cell-materials interaction and provides an effective strategy in engineering arrays of single cells.
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Affiliation(s)
- Mandana Veiseh
- Department of Materials Science & Engineering, University of Washington, Seattle, WA 98195
| | - Omid Veiseh
- Department of Materials Science & Engineering, University of Washington, Seattle, WA 98195
| | - Michael C. Martin
- Advanced Light Source Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720
| | - Fareid Asphahani
- Department of Materials Science & Engineering, University of Washington, Seattle, WA 98195
| | - Miqin Zhang
- Department of Materials Science & Engineering, University of Washington, Seattle, WA 98195
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