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Khosravi Z, Kharaziha M, Goli R, Karimzadeh F. Antibacterial adhesive based on oxidized tannic acid-chitosan for rapid hemostasis. Carbohydr Polym 2024; 333:121973. [PMID: 38494226 DOI: 10.1016/j.carbpol.2024.121973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 02/18/2024] [Accepted: 02/19/2024] [Indexed: 03/19/2024]
Abstract
Currently, bacterial infections and bleeding interfere with wound healing, and multifunctional hydrogels with appropriate blood homeostasis, skin adhesion, and antibacterial activity are desirable. In this study, chitosan-based hydrogels were synthesized using oxidized tannic acid (OTA) and Fe3+ as cross-linkers (CS-OTA-Fe) by forming covalent, non-covalent, and metal coordination bonds between Fe3+ and OTA. Our results demonstrated that CS-OTA-Fe hydrogels showed antibacterial properties against Gram-positive bacteria (Staphylococcus aureus)and Gram-negative bacteria (Escherichia coli), low hemolysis rate (< 2 %), rapid blood clotting ability, in vitro (< 2 min), and in vivo (90 s) in mouse liver bleeding. Additionally, increasing the chitosan concentration from 3 wt% to 4.5 wt% enhanced cross-linking in the network, leading to a significant improvement in the strength (from 106 ± 8 kPa to 168 ± 12 kPa) and compressive modulus (from 50 ± 9 kPa to 102 ± 14 kPa) of hydrogels. Moreover, CS-OTA-Fe hydrogels revealed significant adhesive strength (87 ± 8 kPa) to the cow's skin tissue and cytocompatibility against L929 fibroblasts. Overall, multifunctional CS-OTA-Fe hydrogels with tunable mechanical properties, excellent tissue adhesive, self-healing ability, good cytocompatibility, and fast hemostasis and antibacterial properties could be promising candidates for biomedical applications.
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Affiliation(s)
- Z Khosravi
- Department of Materials Engineering, Isfahan University of Technology, 84156-83111, Isfahan, Iran
| | - M Kharaziha
- Department of Materials Engineering, Isfahan University of Technology, 84156-83111, Isfahan, Iran.
| | - R Goli
- Department of Materials Engineering, Isfahan University of Technology, 84156-83111, Isfahan, Iran
| | - F Karimzadeh
- Department of Materials Engineering, Isfahan University of Technology, 84156-83111, Isfahan, Iran
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2
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Trueman RP, Finn PG, Westwood MM, Dey A, Palgrave R, Tabor A, Phillips JB, Schroeder BC. Improving the biological interfacing capability of diketopyrrolopyrrole polymers via p-type doping. JOURNAL OF MATERIALS CHEMISTRY. C 2023; 11:6943-6950. [PMID: 37274026 PMCID: PMC10233798 DOI: 10.1039/d3tc01148h] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 05/10/2023] [Indexed: 06/06/2023]
Abstract
Polydiketopyrrolopyrrole terthiophene (DPP3T) is an organic semiconducting polymer that has been widely investigated as the active layer within organic electronic devices, such as photovoltaics and bioelectronic sensors. To facilitate interfacing between biological systems and organic semiconductors it is crucial to tune the material properties to support not only cell adhesion, but also proliferation and growth. Herein, we highlight the potential of molecular doping to judiciously modulate the surface properties of DPP3T and investigate the effects on Schwann cell behaviour on the surface. By using p-type dopants FeCl3 and Magic Blue, we successfully alter the topography of DPP3T thin films, which in turn alters cell behaviour of a Schwann cell line on the surfaces of the films over the course of 48 hours. Cell numbers are significantly increased within both DPP3T doped films, as well as cells possessing larger, more spread out morphology indicated by cell size and shape analysis. Furthermore, the viability of the Schwann cells seeded on the surfaces of the films was not significantly lowered. The use of dopants for influencing cell behaviour on semiconducting polymers holds great promise for improving the cell-device interface, potentially allowing better integration of cells and devices at the initial time of introduction to a biological environment.
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Affiliation(s)
- Ryan P Trueman
- Center for Nerve Engineering, UCL London UK
- Department of Pharmacology, UCL School of Pharmacy, University College London London UK
- Department of Chemistry, University College London London UK
| | | | | | - Avishek Dey
- Department of Chemistry, University College London London UK
| | - Robert Palgrave
- Department of Chemistry, University College London London UK
| | - Alethea Tabor
- Department of Chemistry, University College London London UK
| | - James B Phillips
- Center for Nerve Engineering, UCL London UK
- Department of Pharmacology, UCL School of Pharmacy, University College London London UK
| | - Bob C Schroeder
- Department of Chemistry, University College London London UK
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3
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Guo H, Hu R, Huang G, Pu W, Chu X, Xing C, Zhang C. Molybdenum and cadmium co-exposure induces endoplasmic reticulum stress-mediated apoptosis by Th1 polarization in Shaoxing duck (Anas platyrhyncha) spleens. CHEMOSPHERE 2022; 298:134275. [PMID: 35278442 DOI: 10.1016/j.chemosphere.2022.134275] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 02/24/2022] [Accepted: 03/07/2022] [Indexed: 06/14/2023]
Abstract
Excessive molybdenum (Mo) and cadmium (Cd) are deleterious to animals, but immunotoxicity co-induced by Mo and Cd remains unclear. To ascertain the confederate impacts of Mo and Cd on endoplasmic reticulum (ER) stress-mediated apoptosis by Helper T (Th) cells 1 polarization in the spleen of ducks, we randomly allocated forty 8-day-old Shaoxing ducks (Anas platyrhyncha) into 4 groups and reared them with having different doses of Mo and/or Cd basic diet. At the 16th week of the experiment, serum and spleen tissues were extracted. Data confirmed that Mo and/or Cd strikingly promoted their levels in spleen, caused histological abnormality and trace elements imbalance, and disrupted Th1/Th2 balance to divert toward Th1, then triggered ER stress by increasing three branches PERK/eIF2α/CHOP, IRE1/Caspase-12 and TRAF2/JNK signaling pathways-related genes mRNA and proteins levels, which stimulated apoptosis by elevating Bak-1, Bax, Caspase-9, Caspase-3 mRNA expression, and cleaved-Caspase-9/Caspase-9, cleaved-Caspase-3/Caspase-3 proteins expression as well as apoptosis rate, and decreasing Bcl-xL, Bcl-2 mRNA expression and Bcl-2/Bax ratio. Besides, the variation in combined group was most evident. Briefly, the study indicates that Mo and/or Cd exposure trigger ER stress-induced apoptosis via Th1 polarization in duck spleens, and its mechanism is somehow closely linked with the deposition of Cd and Mo, which may aggravate toxic damage to spleen.
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Affiliation(s)
- Huiling Guo
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang, Jiangxi, China
| | - Ruiming Hu
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang, Jiangxi, China
| | - Gang Huang
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang, Jiangxi, China
| | - Wenjing Pu
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang, Jiangxi, China
| | - Xuesheng Chu
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang, Jiangxi, China
| | - Chenghong Xing
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang, Jiangxi, China
| | - Caiying Zhang
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang, Jiangxi, China.
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4
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Decker S, Kunisch E, Moghaddam A, Renkawitz T, Westhauser F. Molybdenum trioxide enhances viability, osteogenic differentiation and extracellular matrix formation of human bone marrow-derived mesenchymal stromal cells. J Trace Elem Med Biol 2021; 68:126827. [PMID: 34371328 DOI: 10.1016/j.jtemb.2021.126827] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 07/01/2021] [Accepted: 07/30/2021] [Indexed: 12/14/2022]
Abstract
BACKGROUND Metals and their ions allow specific modifications of the biological properties of bioactive materials that are intended for application in bone tissue engineering. While there is some evidence about the impact of particles derived from orthopedic Cobalt-Chromium-Molybdenum (Co-Cr-Mo) alloys on cells, there is only limited data regarding the influence of the essential trace element Mo and its ions on the viability, osteogenic differentiation as well as on the formation and maturation of the primitive extracellular matrix (ECM) of primary human bone marrow-derived stromal cells (BMSCs) available so far. METHODS In this study, the influence of a wide range of molybdenum (VI) trioxide (MoO3), concentrations on BMSC viability was evaluated via measurement of fluorescein diacetate metabolization. Thereafter, the impact of three non-cytotoxic concentrations of MoO3 on the cellular osteogenic differentiation as well as on ECM formation and maturation of BMSCs was assessed. RESULTS MoO3 had no negative influence on BMSC viability in most tested concentrations, as viability was in fact even enhanced. Only the highest concentration (10 mM) of MoO3 showed cytotoxic effects. Cellular osteogenic differentiation, measured via the marker enzyme alkaline phosphatase was enhanced by the presence of MoO3 in a concentration-dependent manner. Furthermore, MoO3 showed a positive influence on the expression of relevant marker genes for osteogenic differentiation (osteopontin, osteocalcin and type I collagen alpha 1) and on the formation and maturation of the primitive ECM, as measured by collagen deposition and ECM calcification. CONCLUSION MoO3 is considered as an attractive candidate for supplementation in biomaterials and qualifies for further research.
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Affiliation(s)
- S Decker
- Center of Orthopedics, Traumatology, and Spinal Cord Injury, Heidelberg University Hospital, Schlierbacher Landstraße 200a, 69118, Heidelberg, Germany
| | - E Kunisch
- Center of Orthopedics, Traumatology, and Spinal Cord Injury, Heidelberg University Hospital, Schlierbacher Landstraße 200a, 69118, Heidelberg, Germany
| | - A Moghaddam
- Orthopedic and Trauma Surgery, Frohsinnstraße 12, 63739, Aschaffenburg, Germany
| | - T Renkawitz
- Center of Orthopedics, Traumatology, and Spinal Cord Injury, Heidelberg University Hospital, Schlierbacher Landstraße 200a, 69118, Heidelberg, Germany
| | - F Westhauser
- Center of Orthopedics, Traumatology, and Spinal Cord Injury, Heidelberg University Hospital, Schlierbacher Landstraße 200a, 69118, Heidelberg, Germany.
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Al Doghaither H, Elmorsy E, Al-Ghafari A, Ghulam J. Roles of oxidative stress, apoptosis, and inflammation in metal-induced dysfunction of beta pancreatic cells isolated from CD1 mice. Saudi J Biol Sci 2021; 28:651-663. [PMID: 33424352 PMCID: PMC7785459 DOI: 10.1016/j.sjbs.2020.10.056] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 10/20/2020] [Accepted: 10/26/2020] [Indexed: 02/07/2023] Open
Abstract
The diabetogenic effects of metals including lead (Pb), mercury (Hg), cadmium (Cd), and molybdenum (Mo) have been reported with poorly identified underlying mechanisms. The current study assessed the effect of metals on the roles of oxidative stress, apoptosis, and inflammation in beta pancreatic cells isolated from CD-1 mice, via different biochemical assays. Data showed that the tested metals were cytotoxic to the isolated cells with impaired glucose stimulated insulin secretion (GSIS). This was associated with increased reactive oxygen species (ROS) production, lipid peroxidation, antioxidant enzymes activities, active proapoptotic caspase-3 (cas-3), inflammatory cytokines interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-α) levels in the intoxicated cells. Furthermore, antioxidant-reduced glutathione (GSH-R), cas-3 inhibitor z-VAD-FMK, IL-6 inhibitor bazedoxifene (BZ), and TNF-α inhibitor etanercept (ET) were found to significantly decrease metal-induced cytotoxicity with improved GSIS in metals' intoxicated cells. In conclusion, oxidative stress, apoptosis, and inflammation can play roles in metals-induced diabetogenic effect.
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Affiliation(s)
- Huda Al Doghaither
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Ekramy Elmorsy
- Department of Forensic Medicine and Clinical Toxicology, Faculty of Medicine, Mansoura University, Mansoura, Egypt
- Pathology Department, Faculty of Medicine, Northern Border University, Arar, Saudi Arabia
| | - Ayat Al-Ghafari
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
- Cancer Metabolism and Epigenetics Unit, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
- Cancer and Mutagenesis Unit, King Fahd Medical Research Centre, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Jihan Ghulam
- General Education Department, Dar Al-Hekma University, Jeddah Saudi Arabia
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Pigarev SE, Trashkov AP, Panchenko AV, Yurova MN, Bykov VN, Fedoros EI, Anisimov VN. Evaluation of the genotoxic and antigenotoxic potential of lignin-derivative BP-C2 in the comet assay in vivo. ENVIRONMENTAL RESEARCH 2021; 192:110321. [PMID: 33075358 DOI: 10.1016/j.envres.2020.110321] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 09/29/2020] [Accepted: 10/06/2020] [Indexed: 06/11/2023]
Abstract
The genotoxic and antigenotoxic potential of BP-C2, a novel lignin-derived polyphenolic composition with ammonium molybdate, was investigated as a radioprotector/radiomitigator for civil applications and as a medical countermeasure for radiation emergencies. Using the alkaline comet assay and methyl methanesulfonate (MMS, 40 mg/kg) as the DNA-damaging agent, these effects of BP-C2 on liver, bone marrow cells and blood leukocytes in rats were studied. The DNA damage was estimated by the DNA content in the comet tail (TDNA, %) 1, 6 and 18 h post exposure to MMS. BP-C2 at doses of 20, 200 and 2000 mg/kg did not exert genotoxic activity in the tested tissues in rats. BP-C2 administered at doses of 20, 100 and 200 mg/kg 1 h before MMS significantly (p < 0.01) mitigated MMS-induced DNA damage, showing a strong genoprotective effect in the liver. In blood leukocytes and bone marrow samples of animals treated with BP-C2, the TDNA % was slightly higher than in the negative control (vehicle) but significantly lower than in the positive control (MMS). Thus, BP-C2 exerted a genoprotective effect against MMS-induced DNA damage to a greater extent towards liver cells, requiring further evaluation of this substance as a genoprotective agent.
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Affiliation(s)
- S E Pigarev
- N.N. Petrov National Medical Research Center of Oncology, Saint Petersburg, Russia; Nobel LTD, Saint-Petersburg, Russia.
| | - A P Trashkov
- Petersburg Nuclear Physics Institute Named By B.P. Konstantinov of NRC "Kurchatov Institute", Gatchina, Russia
| | - A V Panchenko
- N.N. Petrov National Medical Research Center of Oncology, Saint Petersburg, Russia; FSBSI "Research Institute of Medical Primatology", Sochi, Russian
| | - M N Yurova
- N.N. Petrov National Medical Research Center of Oncology, Saint Petersburg, Russia
| | - V N Bykov
- N.N. Petrov National Medical Research Center of Oncology, Saint Petersburg, Russia
| | - E I Fedoros
- N.N. Petrov National Medical Research Center of Oncology, Saint Petersburg, Russia; Nobel LTD, Saint-Petersburg, Russia
| | - V N Anisimov
- N.N. Petrov National Medical Research Center of Oncology, Saint Petersburg, Russia
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Silva KMMN, Costa BL, Dourado LF, Silva RO, Silva‐Cunha A, Santos AK, Resende RR, Faria PE, Campos Rubio JC, Goulart GAC, Silva‐Caldeira PP. Four modified sodium alginate/carboxymethylcellulose blends for prednisone delivery. J Appl Polym Sci 2020. [DOI: 10.1002/app.50383] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
| | - Bruna Lopes Costa
- Faculty of Pharmacy Universidade Federal de Minas Gerais Belo Horizonte Minas Gerais Brazil
| | - Lays Fernanda Dourado
- Faculty of Pharmacy Universidade Federal de Minas Gerais Belo Horizonte Minas Gerais Brazil
| | | | - Armando Silva‐Cunha
- Faculty of Pharmacy Universidade Federal de Minas Gerais Belo Horizonte Minas Gerais Brazil
| | - Anderson Kenedy Santos
- Institute of Biological Science Universidade Federal de Minas Gerais Belo Horizonte Minas Gerais Brazil
| | - Rodrigo Ribeiro Resende
- Institute of Biological Science Universidade Federal de Minas Gerais Belo Horizonte Minas Gerais Brazil
| | - Paulo Eustáquio Faria
- Department of Production Engineering Universidade Federal de Minas Gerais Belo Horizonte Minas Gerais Brazil
| | - Juan Carlos Campos Rubio
- Department of Production Engineering Universidade Federal de Minas Gerais Belo Horizonte Minas Gerais Brazil
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8
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Vizureanu P, Simona Bălțatu M, Victor Sandu A. Development of New Advanced Ti-Mo Alloys for Medical Applications. Biomaterials 2020. [DOI: 10.5772/intechopen.91906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The use of titanium and titanium-based alloys with applications in implantology and dentistry has made remarkable progress in the promotion of new technologies and new materials that have been developed in recent years. This is justified thanks to their excellent mechanical, physical, and biological performance. Today’s generation promotes new titanium alloys, with nontoxic elements and long-term performance and without rejection of the human body. This book chapter describes new original compositions of Ti-based alloys for medical applications, with improved properties compared to existing classical alloys (C.p. Ti, Ti6Al4V, CoCrMo, etc.). The addition of nontoxic elements such as Mo, Si, Zr, and Ta brings benefits as reduced modulus of elasticity, increased corrosion resistance, and improved biocompatibility.
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9
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Huang T, Kumari S, Herold H, Bargel H, Aigner TB, Heath DE, O’Brien-Simpson NM, O’Connor AJ, Scheibel T. Enhanced Antibacterial Activity of Se Nanoparticles Upon Coating with Recombinant Spider Silk Protein eADF4(κ16). Int J Nanomedicine 2020; 15:4275-4288. [PMID: 32606677 PMCID: PMC7306472 DOI: 10.2147/ijn.s255833] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Accepted: 05/14/2020] [Indexed: 12/16/2022] Open
Abstract
PURPOSE Selenium nanoparticles (Se NPs) are promising antibacterial agents to tackle the growing problem of antimicrobial resistance. The aim of this study was to fabricate Se NPs with a net positive charge to enhance their antibacterial efficacy. METHODS Se NPs were coated with a positively charged protein - recombinant spider silk protein eADF4(κ16) - to give them a net positive surface charge. Their cytotoxicity and antibacterial activity were investigated, with negatively charged polyvinyl alcohol coated Se NPs as a control. Besides, these eADF4(κ16)-coated Se NPs were immobilized on the spider silk films, and the antibacterial activity of these films was investigated. RESULTS Compared to the negatively charged polyvinyl alcohol coated Se NPs, the positively charged eADF4(κ16)-coated Se NPs demonstrated a much higher bactericidal efficacy against the Gram-negative bacteria E. coli, with a minimum bactericidal concentration (MBC) approximately 50 times lower than that of negatively charged Se NPs. Cytotoxicity testing showed that the eADF4(κ16)-coated Se NPs are safe to both Balb/3T3 mouse embryo fibroblasts and HaCaT human skin keratinocytes up to 31 µg/mL, which is much higher than the MBC of these particles against E. coli (8 ± 1 µg/mL). In addition, antibacterial coatings were created by immobilising the eADF4(κ16)-coated Se NPs on positively charged spider silk films and these were shown to retain good bactericidal efficacy and overcome the issue of low particle stability in culture broth. It was found that these Se NPs needed to be released from the film surface in order to exert their antibacterial effects and this release can be regulated by the surface charge of the film, such as the change of the spider silk protein used. CONCLUSION Overall, eADF4(κ16)-coated Se NPs are promising new antibacterial agents against life-threatening bacteria.
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Affiliation(s)
- Tao Huang
- Department of Biomedical Engineering, Melbourne School of Engineering, University of Melbourne, Parkville, VIC3010, Australia
- Department for Biomaterials, Faculty of Engineering Science, University of Bayreuth, Prof. Rüdiger Bormann Str. 1, Bayreuth95447, Germany
| | - Sushma Kumari
- Department for Biomaterials, Faculty of Engineering Science, University of Bayreuth, Prof. Rüdiger Bormann Str. 1, Bayreuth95447, Germany
| | - Heike Herold
- Department for Biomaterials, Faculty of Engineering Science, University of Bayreuth, Prof. Rüdiger Bormann Str. 1, Bayreuth95447, Germany
| | - Hendrik Bargel
- Department for Biomaterials, Faculty of Engineering Science, University of Bayreuth, Prof. Rüdiger Bormann Str. 1, Bayreuth95447, Germany
| | - Tamara B Aigner
- Department for Biomaterials, Faculty of Engineering Science, University of Bayreuth, Prof. Rüdiger Bormann Str. 1, Bayreuth95447, Germany
| | - Daniel E Heath
- Department of Biomedical Engineering, Melbourne School of Engineering, University of Melbourne, Parkville, VIC3010, Australia
| | - Neil M O’Brien-Simpson
- Melbourne Dental School and the Bio21 Institute of Molecular Science and Biotechnology, The University of Melbourne, Parkville, VIC3010, Australia
| | - Andrea J O’Connor
- Department of Biomedical Engineering, Melbourne School of Engineering, University of Melbourne, Parkville, VIC3010, Australia
| | - Thomas Scheibel
- Department for Biomaterials, Faculty of Engineering Science, University of Bayreuth, Prof. Rüdiger Bormann Str. 1, Bayreuth95447, Germany
- Bavarian Polymer Institute (BPI), Bayreuth Center for Material Science and Engineering (BayMAT), Bayreuth Center for Colloids and Interfaces (BZKG), Bayreuth Center for Molecular Biosciences (BZMB), University of Bayreuth, Bayreuth95447, Germany
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10
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Skjöldebrand C, Hulsart-Billström G, Engqvist H, Persson C. Si-Fe-C-N Coatings for Biomedical Applications: A Combinatorial Approach. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E2074. [PMID: 32366008 PMCID: PMC7254256 DOI: 10.3390/ma13092074] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 04/15/2020] [Accepted: 04/23/2020] [Indexed: 11/17/2022]
Abstract
Ceramic coatings may prolong the lifetime of joint implants. Certain ions and wear debris may however lead to negative biological effects. SiN-based materials may substantially reduce these effects, but still need optimization for the application. In this study, a combinatorial deposition method enabled an efficient evaluation of a range of Si-Fe-C-N coating compositions on the same sample. The results revealed compositional gradients of Si (26.0-33.9 at.%), Fe (9.6-20.9 at.%), C (8.2-13.9 at.%) and N (39.7-47.2 at.%), and low oxygen contaminations (0.3-0.6 at.%). The mechanical properties varied with a hardness (H) ranging between 13.7-17.3 GPa and an indentation modulus (M) between 190-212 GPa. Both H and M correlated with the Si (H and M increased as Si increased) and Fe (H and M decreased as Fe increased) content. A slightly columnar morphology was observed in cross-sections, as well as a surface roughness in the nm range. A cell study revealed adhering pre-osteogenic MC3T3 cells, with a morphology similar to that of cells seeded on a tissue culture plastic control. The investigated coatings could be considered for further investigation due to the ability to tune their mechanical properties while maintaining a smooth surface, together with their promising in vitro cell response.
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Affiliation(s)
- Charlotte Skjöldebrand
- Department of Materials Science and Engineering, Faculty of Science and Technology, Uppsala University, 752 37 Uppsala, Sweden; (C.S.); (H.E.)
| | - Gry Hulsart-Billström
- Department of Surgical Sciences, Faculty of Medicine and Pharmacy, Uppsala University, 751 83 Uppsala, Sweden;
| | - Håkan Engqvist
- Department of Materials Science and Engineering, Faculty of Science and Technology, Uppsala University, 752 37 Uppsala, Sweden; (C.S.); (H.E.)
| | - Cecilia Persson
- Department of Materials Science and Engineering, Faculty of Science and Technology, Uppsala University, 752 37 Uppsala, Sweden; (C.S.); (H.E.)
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11
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Lee SY, Hur SJ. Effect of Treatment with Peptide Extract from Beef Myofibrillar Protein on Oxidative Stress in the Brains of Spontaneously Hypertensive Rats. Foods 2019; 8:E455. [PMID: 31590451 PMCID: PMC6836098 DOI: 10.3390/foods8100455] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 09/26/2019] [Accepted: 09/27/2019] [Indexed: 02/07/2023] Open
Abstract
This study was conducted to determine the effect of beef peptide extract on oxidative stress in the brains of spontaneously hypertensive rats (SHRs). A 3-kDa peptide extract was obtained from beef myofibrillar protein using alkaline-AK (AK3K). Oxidative stress in SHR brains was measured by assessing malondialdehyde (MDA) and reactive oxygen species (ROS) concentrations and superoxide dismutase (SOD), catalase, and glutathione peroxidase (GPx) activity. The SHR brains treated with the AK3K peptide extract (400 mg/kg body weight, AK3K400) showed a significant decrease in MDA and ROS contents by 0.33 and 23.92 μM, respectively (p < 0.05) compared to the control. The SOD activity for AK3K400 was 61.26%, around 20% higher than the control. Furthermore, the SHRs treated with the AK3K peptide extract showed results similar to those obtained using captopril, a hypertension drug, except for the MDA level. The study demonstrates that the beef peptide extract inhibits the generation of oxidative stress in the SHR brain and could possibly be used for neuronal hypertension therapy.
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Affiliation(s)
- Seung Yun Lee
- Department of Animal Science and Technology, Chung-Ang University, 4726 Seodong-daero, Daedeok-myeon, Anseong-si, 17546 Gyeonggi, Korea
| | - Sun Jin Hur
- Department of Animal Science and Technology, Chung-Ang University, 4726 Seodong-daero, Daedeok-myeon, Anseong-si, 17546 Gyeonggi, Korea.
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12
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Guttmann S, Dewald ET, Wohlfarth C, Müller JC, Karst U, Schmidt HH, Zibert A. Compound-specific adaptation of hepatoma cell lines to toxic iron. Metallomics 2019; 11:1836-1846. [PMID: 31552988 DOI: 10.1039/c9mt00202b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Cellular adaptation to excess iron (Fe) is a major determinant to protect tissues from toxicity. The adaptation of hepatoma cell lines following exposure to toxic levels of Fe compounds was studied. A dose- and time-dependent induction of toxicity was observed that was strictly compound-specific. Similar ranging orders of toxicity, i.e. iron chloride >iron sulfate >iron citrate, were observed in four human hepatoma cell lines. Long-term cultivation of HepG2 cells in 10 mM iron citrate resulted in a resistant cell line that displayed high proliferation rates for several months. Resistant cells showed increased viability at iron citrate concentrations ranging from 5-15 mM, while exposition to iron chloride or iron sulfate induced high rates of toxicity similar to parental cells. Resistance was not due to decreased Fe uptake/storage since high intracellular Fe levels were observed. A broad range of modulated gene expression was associated with short- and long-term iron citrate exposition; however, after weaning of resistant cells, re-exposition to Fe induced a similar level of toxicity as observed in parental cells suggesting that a transient adaptation of gene expression was mounted. The results indicate that, depending on the nature of the Fe compound, a specific level of toxicity is induced in hepatic cells which however can be overcome by establishment of resistance.
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Affiliation(s)
- Sarah Guttmann
- Medizinische Klinik B für Gastroenterologie und Hepatologie, Universitätsklinikum Münster, Albert-Schweitzer-Campus 1, Gebäude A14, 48149 Münster, Germany.
| | - Elisabeth Therese Dewald
- Medizinische Klinik B für Gastroenterologie und Hepatologie, Universitätsklinikum Münster, Albert-Schweitzer-Campus 1, Gebäude A14, 48149 Münster, Germany.
| | - Cathrin Wohlfarth
- Medizinische Klinik B für Gastroenterologie und Hepatologie, Universitätsklinikum Münster, Albert-Schweitzer-Campus 1, Gebäude A14, 48149 Münster, Germany.
| | | | - Uwe Karst
- Institute of Inorganic and Analytical Chemistry, University of Münster, Münster, Germany
| | - Hartmut H Schmidt
- Medizinische Klinik B für Gastroenterologie und Hepatologie, Universitätsklinikum Münster, Albert-Schweitzer-Campus 1, Gebäude A14, 48149 Münster, Germany.
| | - Andree Zibert
- Medizinische Klinik B für Gastroenterologie und Hepatologie, Universitätsklinikum Münster, Albert-Schweitzer-Campus 1, Gebäude A14, 48149 Münster, Germany.
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