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Yang J, Liu C, Sun H, Liu Y, Liu Z, Zhang D, Zhao G, Wang Q, Yang D. The progress in titanium alloys used as biomedical implants: From the view of reactive oxygen species. Front Bioeng Biotechnol 2022; 10:1092916. [PMID: 36601391 PMCID: PMC9806234 DOI: 10.3389/fbioe.2022.1092916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 12/07/2022] [Indexed: 12/23/2022] Open
Abstract
Titanium and Titanium alloys are widely used as biomedical implants in oral and maxillofacial surgery, due to superior mechanical properties and biocompatibility. In specific clinical populations such as the elderly, diabetics and patients with metabolic diseases, the failure rate of medical metal implants is increased significantly, putting them at increased risk of revision surgery. Many studies show that the content of reactive oxygen species (ROS) in the microenvironment of bone tissue surrounding implant materials is increased in patients undergoing revision surgery. In addition, the size and shape of materials, the morphology, wettability, mechanical properties, and other properties play significant roles in the production of ROS. The accumulated ROS break the original balance of oxidation and anti-oxidation, resulting in host oxidative stress. It may accelerate implant degradation mainly by activating inflammatory cells. Peri-implantitis usually leads to a loss of bone mass around the implant, which tends to affect the long-term stability and longevity of implant. Therefore, a great deal of research is urgently needed to focus on developing antibacterial technologies. The addition of active elements to biomedical titanium and titanium alloys greatly reduce the risk of postoperative infection in patients. Besides, innovative technologies are developing new biomaterials surfaces conferring anti-infective properties that rely on the production of ROS. It can be considered that ROS may act as a messenger substance for the communication between the host and the implanted material, which run through the entire wound repair process and play a role that cannot be ignored. It is necessary to understand the interaction between oxidative stress and materials, the effects of oxidative stress products on osseointegration and implant life as well as ROS-induced bactericidal activity. This helps to facilitate the development of a new generation of well-biocompatible implant materials with ROS responsiveness, and ultimately prolong the lifespan of implants.
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Affiliation(s)
- Jun Yang
- School of Stomatology, Jiamusi University, Jiamusi, China,Liaoning Provincial Key Laboratory of Oral Diseases, School and Hospital of Stomatology, China Medical University, Shenyang, China
| | - Chang Liu
- School of Stomatology, Jiamusi University, Jiamusi, China,Liaoning Provincial Key Laboratory of Oral Diseases, School and Hospital of Stomatology, China Medical University, Shenyang, China
| | - Hui Sun
- Liaoning Provincial Key Laboratory of Oral Diseases, School and Hospital of Stomatology, China Medical University, Shenyang, China
| | - Ying Liu
- The Affiliated Taian City Central Hospital of Qingdao University, Taian, China
| | - Zhaogang Liu
- The Affiliated Taian City Central Hospital of Qingdao University, Taian, China
| | - Dan Zhang
- Liaoning Provincial Key Laboratory of Oral Diseases, School and Hospital of Stomatology, China Medical University, Shenyang, China,*Correspondence: Donghong Yang, ; Dan Zhang,
| | - Gang Zhao
- School of Stomatology, Jiamusi University, Jiamusi, China
| | - Qiang Wang
- Liaoning Provincial Key Laboratory of Oral Diseases, School and Hospital of Stomatology, China Medical University, Shenyang, China
| | - Donghong Yang
- School of Stomatology, Jiamusi University, Jiamusi, China,*Correspondence: Donghong Yang, ; Dan Zhang,
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2
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Pappa A, Papadimitriou-Tsantarliotou A, Kaloyianni M, Kastrinaki G, Dailianis S, Lambropoulou DA, Christodoulou E, Kyzas GZ, Bikiaris DN. Insights into the toxicity of biomaterials microparticles with a combination of cellular and oxidative biomarkers. JOURNAL OF HAZARDOUS MATERIALS 2021; 413:125335. [PMID: 33930942 DOI: 10.1016/j.jhazmat.2021.125335] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 02/02/2021] [Accepted: 02/03/2021] [Indexed: 06/12/2023]
Abstract
Considering that the extensive biomedical, pharmaceutics, cosmetic and other industrial applications of biomaterials (BMs) is of great concern nowadays, regarding their environmental risk, the present study aimed to investigate the effects of four BMs, poly(ε-caprolactone) (PCL), poly(butylene succinate) (PBSu), chitosan (CS) and modified chitosan (succinic acid grafted chitosan) (CS-Suc) in the form of microplastics (particle sizes less than 1 mm) on biochemical parameters of snails Cornu aspersum hemocytes. Due to the absence of knowledge about the environmentally relevant concentrations of BMs, snails were initially treated through their food with a wide range of nominal concentrations of each BM to define the half maximal effective concentration (NRRT50), according to the destabilization degree of hemocytes' lysosomal membranes (by mean of neutral red retention time/NRRT assay). Thereafter, snails were treated with each BM, at concentrations lower than the estimated NRRT50 values in all cases, for periods up to 15 days. After the end of the exposure period, a battery of stress indices were measured in hemocytes of challenged snails. According to the results, all parameters tested in BMs-treated snails statistically differed from those measured in BMs-free snails, thus indicating the pro-oxidant potential of BMs, as well as their ability to affect animals' physiology. The most considerable effect in most cases seems to be caused by modified chitosan and PCL, while chitosan appears to be the least toxic. A common response mechanism of snails' blood cells against the 4 BMs used in the present study was shown. After exposure to each of the studied BMs a significant augmentation in protein carbonyls, MDA equivalents and DNA damage, while a significant reduction in NRRT values was determined in the snails hemocytes, in relation to the unexposed animals. From the biochemical parameters examined, MDA equivalents and DNA damage seem to be more susceptible than the other parameters studied, to respond to BMs effect, with MDA to react with more sensitivity to PCL and CS, while DNA damage to CS-Suc and PBSu. Our results could suggest the simultaneous use of the latter biomarkers in biomonitoring studies of terrestrial ecosystems against the specific BMs.
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Affiliation(s)
- Anna Pappa
- Laboratory of Animal Physiology, Department of Zoology, School of Biology, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece
| | - Aliki Papadimitriou-Tsantarliotou
- Laboratory of Animal Physiology, Department of Zoology, School of Biology, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece
| | - Martha Kaloyianni
- Laboratory of Animal Physiology, Department of Zoology, School of Biology, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece.
| | | | - Stefanos Dailianis
- Section of Animal Biology, Department of Biology, Faculty of Sciences, University of Patras, Patras 26 500, Greece
| | - Dimitra A Lambropoulou
- Laboratory of Environmental Pollution Control, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece
| | - Evi Christodoulou
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece
| | - George Z Kyzas
- Department of Chemistry, International Hellenic University, Kavala GR-654 04, Greece
| | - Dimitrios N Bikiaris
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece.
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Prakash A, Lata R, Martens PJ, Rohindra D. Characterization and
in‐vitro
analysis of poly(ε‐caprolactone)‐“Jackfruit” Mucilage blends for tissue engineering applications. POLYM ENG SCI 2021. [DOI: 10.1002/pen.25597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Anshu Prakash
- School of Biological and Chemical Sciences, Faculty of Science Technology and Environment The University of the South Pacific Suva Fiji
| | - Roselyn Lata
- School of Biological and Chemical Sciences, Faculty of Science Technology and Environment The University of the South Pacific Suva Fiji
| | - Penny J. Martens
- Graduate School of Biomedical Engineering UNSW Sydney (The University of New South Wales) Sydney Australia
| | - David Rohindra
- School of Biological and Chemical Sciences, Faculty of Science Technology and Environment The University of the South Pacific Suva Fiji
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4
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Sthijns MMJPE, Jetten MJ, Mohammed SG, Claessen SMH, de Vries RHW, Stell A, de Bont DFA, Engelse MA, Mumcuoglu D, van Blitterswijk CA, Dankers PYW, de Koning EJP, van Apeldoorn AA, LaPointe VLS. Oxidative stress in pancreatic alpha and beta cells as a selection criterion for biocompatible biomaterials. Biomaterials 2020; 267:120449. [PMID: 33129188 DOI: 10.1016/j.biomaterials.2020.120449] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 10/06/2020] [Accepted: 10/10/2020] [Indexed: 12/12/2022]
Abstract
The clinical success rate of islet transplantation, namely independence from insulin injections, is limited by factors that lead to graft failure, including inflammation, acute ischemia, acute phase response, and insufficient vascularization. The ischemia and insufficient vascularization both lead to high levels of oxidative stress, which are further aggravated by islet encapsulation, inflammation, and undesirable cell-biomaterial interactions. To identify biomaterials that would not further increase damaging oxidative stress levels and that are also suitable for manufacturing a beta cell encapsulation device, we studied five clinically approved polymers for their effect on oxidative stress and islet (alpha and beta cell) function. We found that 300 poly(ethylene oxide terephthalate) 55/poly(butylene terephthalate) 45 (PEOT/PBT300) was more resistant to breakage and more elastic than other biomaterials, which is important for its immunoprotective function. In addition, it did not induce oxidative stress or reduce viability in the MIN6 beta cell line, and even promoted protective endogenous antioxidant expression over 7 days. Importantly, PEOT/PBT300 is one of the biomaterials we studied that did not interfere with insulin secretion in human islets.
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Affiliation(s)
- Mireille M J P E Sthijns
- Department of Cell Biology-Inspired Tissue Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Universiteitssingel 40, 6229 ER, Maastricht, the Netherlands
| | - Marlon J Jetten
- Department of Cell Biology-Inspired Tissue Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Universiteitssingel 40, 6229 ER, Maastricht, the Netherlands
| | - Sami G Mohammed
- Department of Cell Biology-Inspired Tissue Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Universiteitssingel 40, 6229 ER, Maastricht, the Netherlands
| | - Sandra M H Claessen
- Department of Cell Biology-Inspired Tissue Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Universiteitssingel 40, 6229 ER, Maastricht, the Netherlands
| | - Rick H W de Vries
- Department of Cell Biology-Inspired Tissue Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Universiteitssingel 40, 6229 ER, Maastricht, the Netherlands
| | - Adam Stell
- Department of Cell Biology-Inspired Tissue Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Universiteitssingel 40, 6229 ER, Maastricht, the Netherlands
| | - Denise F A de Bont
- Department of Cell Biology-Inspired Tissue Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Universiteitssingel 40, 6229 ER, Maastricht, the Netherlands
| | - Marten A Engelse
- Department of Medicine, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, the Netherlands
| | - Didem Mumcuoglu
- Department of Biomedical Engineering, and Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, the Netherlands
| | - Clemens A van Blitterswijk
- Department of Cell Biology-Inspired Tissue Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Universiteitssingel 40, 6229 ER, Maastricht, the Netherlands
| | - Patricia Y W Dankers
- Department of Biomedical Engineering, and Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, the Netherlands
| | - Eelco J P de Koning
- Department of Medicine, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, the Netherlands; Hubrecht Institute, Uppsalalaan 8, 3584 CT, Utrecht, the Netherlands
| | - Aart A van Apeldoorn
- Department of Cell Biology-Inspired Tissue Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Universiteitssingel 40, 6229 ER, Maastricht, the Netherlands
| | - Vanessa L S LaPointe
- Department of Cell Biology-Inspired Tissue Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Universiteitssingel 40, 6229 ER, Maastricht, the Netherlands.
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5
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Li C, Yang L, Ren X, Lin M, Shen D, Li Y, Zhang X, Liu C, Mu Y. Grooved hydroxyapatite scaffold modulates mitochondria homeostasis and thus promotes osteogenesis in bone mesenchymal stromal cells. Mol Med Rep 2020; 22:2801-2809. [PMID: 32700750 PMCID: PMC7453552 DOI: 10.3892/mmr.2020.11352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 02/26/2020] [Indexed: 11/30/2022] Open
Abstract
Hydroxyapatite scaffolds (HASs) are widely studied as suitable materials for bone replacement scaffolds due to their chemical similarities to organic materials. In our previous study, a novel HAS with a 25–30-µm groove structure (HAS-G) exhibited enhanced osteogenesis of bone mesenchymal stromal cells (BMSCs) compared with HAS, potentially by modulating the macrophage-induced immune microenvironment. However, the exact effects of different surface patterns on the physiological processes of attached cells is not known. The present study aimed to determine the effects of HAS-G on the osteogenesis and physiological processes in BMSCs. Cell counting kit-8 assays and propidium iodide staining followed by flow cytometry were performed, and the results demonstrated that both in normal medium and differentiating medium, HAS-G promoted cell proliferation by decreasing the proportion of G1/G0 cells and decreased reactive oxygen species (ROS) accumulation in BMSCs compared with HAS. Detection markers of osteogenesis revealed that compared with HAS, HAS-G increased runt-related transcription factor 2, osteocalcin and osteopontin protein levels and promoted osteogenesis, which was further confirmed by Alizarin Red S staining. Following JC-1 staining, it was observed that HAS-G maintained the mitochondrial membrane potential, similar to that achieved by N-acetylcysteine pretreatment. In addition, compared with those of HAS, HAS-G decreased mitochondrial ROS levels, which potentially contributed to the promotion of osteogenesis. The results also demonstrated that HAS-G inhibited mitophagy induced by ROS accumulation and ATP synthesis compared with HAS. In conclusion, HAS-G decreased ROS accumulation and mitophagy and thus promoted osteogenesis of BMSCs, indicating that ROS modulation of HAS-G may serve a key role in osteogenesis.
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Affiliation(s)
- Chenglong Li
- Department of Stomatology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, Sichuan 610072, P.R. China
| | - Lu Yang
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, P.R. China
| | - Xiaohua Ren
- Department of Stomatology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, Sichuan 610072, P.R. China
| | - Mu Lin
- Department of Stomatology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, Sichuan 610072, P.R. China
| | - Daonan Shen
- West China School and Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610063, P.R. China
| | - You Li
- West China School and Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610063, P.R. China
| | - Xiangyu Zhang
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Chengdu, Sichuan 610041, P.R. China
| | - Chunhui Liu
- Department of Stomatology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, Sichuan 610072, P.R. China
| | - Yandong Mu
- Department of Stomatology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, Sichuan 610072, P.R. China
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6
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Kuhnt T, Marroquín García R, Camarero-Espinosa S, Dias A, Ten Cate AT, van Blitterswijk CA, Moroni L, Baker MB. Poly(caprolactone-co-trimethylenecarbonate) urethane acrylate resins for digital light processing of bioresorbable tissue engineering implants. Biomater Sci 2020; 7:4984-4989. [PMID: 31667486 DOI: 10.1039/c9bm01042d] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
To exploit the usability of Digital Light Processing (DLP) in regenerative medicine, biodegradable, mechanically customizable and well-defined polyester urethane acrylate resins were synthesized based on poly(caprolactone-co-trimethlenecarbonate). By controlling the monomer ratio, the resultant fabricated constructs showed tunable mechanical properties, degradation and attached hMSC morphologies.
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Affiliation(s)
- Tobias Kuhnt
- Department of Complex Tissue Regeneration, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, 6211 LK Maastricht, The Netherlands.
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7
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Bernard M, Jubeli E, Pungente MD, Yagoubi N. Biocompatibility of polymer-based biomaterials and medical devices – regulations,in vitroscreening and risk-management. Biomater Sci 2018; 6:2025-2053. [DOI: 10.1039/c8bm00518d] [Citation(s) in RCA: 123] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Biomaterials play an increasing role in modern health care systems.
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Affiliation(s)
- Mélisande Bernard
- Paris-Sud University
- Faculty of Pharmacy
- EA 401
- “Groupe Matériaux et Santé”
- Paris
| | - Emile Jubeli
- Paris-Sud University
- Faculty of Pharmacy
- EA 401
- “Groupe Matériaux et Santé”
- Paris
| | | | - Najet Yagoubi
- Paris-Sud University
- Faculty of Pharmacy
- EA 401
- “Groupe Matériaux et Santé”
- Paris
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8
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Mouthuy PA, Snelling SJ, Dakin SG, Milković L, Gašparović AČ, Carr AJ, Žarković N. Biocompatibility of implantable materials: An oxidative stress viewpoint. Biomaterials 2016; 109:55-68. [DOI: 10.1016/j.biomaterials.2016.09.010] [Citation(s) in RCA: 120] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 09/06/2016] [Accepted: 09/13/2016] [Indexed: 12/13/2022]
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9
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Gao X, Song J, Ji P, Zhang X, Li X, Xu X, Wang M, Zhang S, Deng Y, Deng F, Wei S. Polydopamine-Templated Hydroxyapatite Reinforced Polycaprolactone Composite Nanofibers with Enhanced Cytocompatibility and Osteogenesis for Bone Tissue Engineering. ACS APPLIED MATERIALS & INTERFACES 2016; 8:3499-515. [PMID: 26756224 DOI: 10.1021/acsami.5b12413] [Citation(s) in RCA: 105] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Nanohydroxyapatite (HA) synthesized by biomimetic strategy is a promising nanomaterial as bone substitute due to its physicochemical features similar to those of natural nanocrystal in bone tissue. Inspired by mussel adhesive chemistry, a novel nano-HA was synthesized in our work by employing polydopamine (pDA) as template under weak alkaline condition. Subsequently, the as-prepared pDA-templated HA (tHA) was introduced into polycaprolactone (PCL) matrix via coelectrospinning, and a bioactive tHA/PCL composite nanofiber scaffold was developed targeted at bone regeneration application. Our research showed that tHA reinforced PCL composite nanofibers exhibited favorable cytocompatibility at given concentration of tHA (0-10 w.t%). Compared to pure PCL and traditional nano-HA enriched PCL (HA/PCL) composite nanofibers, enhanced cell adhesion, spreading and proliferation of human mesenchymal stem cells (hMSCs) were observed on tHA/PCL composite nanofibers on account of the contribution of pDA present in tHA. More importantly, tHA nanoparticles exposed on the surface of composite nanofibers could further promote osteogenesis of hMSCs in vitro even in the absence of osteogenesis soluble inducing factors when compared to traditional HA/PCL scaffolds, which was supported by in vivo test as well according to the histological analysis. Overall, our study demonstrated that the developed tHA/PCL composite nanofibers with enhanced cytocompatibility and osteogenic capacity hold great potential as scaffolds for bone tissue engineering.
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Affiliation(s)
- Xiang Gao
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education , Chongqing 401147, China
| | - Jinlin Song
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education , Chongqing 401147, China
| | - Ping Ji
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education , Chongqing 401147, China
| | - Xiaohong Zhang
- Center for Biomedical Materials and Tissue Engineering, Academy for Advanced Interdisciplinary Studies, Peking University , Beijing 100871, China
| | | | | | | | - Siqi Zhang
- Center for Biomedical Materials and Tissue Engineering, Academy for Advanced Interdisciplinary Studies, Peking University , Beijing 100871, China
| | - Yi Deng
- Center for Biomedical Materials and Tissue Engineering, Academy for Advanced Interdisciplinary Studies, Peking University , Beijing 100871, China
| | - Feng Deng
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education , Chongqing 401147, China
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10
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Serrano MC, Nardecchia S, Gutiérrez MC, Ferrer ML, del Monte F. Mammalian cell cryopreservation by using liquid marbles. ACS APPLIED MATERIALS & INTERFACES 2015; 7:3854-3860. [PMID: 25610989 DOI: 10.1021/acsami.5b00072] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Liquid marbles (LMs) are nonsticky droplets covered by micro- or nanometrically scaled particles and obtained by simply rolling small amounts of a liquid in a very hydrophobic powder. Since pioneer work by Aussillous and Quéré, a wide palette of hydrophobic materials for the preparation of LMs, as well as potential applications, have been reported. Because of the bioinspired origin of this concept, the applicability of LMs in biomedicine is gaining increasing attention, with remarkable advances in their use as microbioreactors for blood typing, drug screening, and tumor growth, among others. Herein, we explore the novel use of LMs as a biotechnological tool for the cryopreservation of mammalian cells as an alternative to conventional methods, which typically require the use of cryopreservant agents that commonly associate with some degree of cell toxicity. Murine L929 fibroblasts, a reference cell line for cytotoxicity studies, and poly(tetrafluoroethylene), a hydrophobic polymer widely used in cardiovascular surgery, were selected for the preparation of the cell-containing LMs. Our results reveal that there is a safe range of droplet volumes and cell densities that can be successfully used to cryopreserve mammalian cell lines and recover them after thawing without significantly affecting major cellular parameters such as adhesion, morphology, viability, proliferation, and cell cycle. We envision that progress in the exploration of cell-containing LMs could also open their impact as microreactors for the miniaturization of cytotoxicity procedures of drugs and materials in which powerful tools for cell evaluation such as flow cytometry could be used because of the elevated amount of cells handled.
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Affiliation(s)
- M Concepción Serrano
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas (CSIC) , C/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
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11
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Suri S, Lehman SM, Selvam S, Reddie K, Maity S, Murthy N, García AJ. In vivo fluorescence imaging of biomaterial-associated inflammation and infection in a minimally invasive manner. J Biomed Mater Res A 2014; 103:76-83. [PMID: 24616254 DOI: 10.1002/jbm.a.35162] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Revised: 03/01/2014] [Accepted: 03/04/2014] [Indexed: 12/18/2022]
Abstract
Implant-associated inflammation and bacterial infection severely limit the functional performance of medical devices and are a major cause of implant failure. Therefore, it is crucial to develop methodologies to monitor/image implant-associated aseptic inflammation and bacterial infection in a minimally invasive manner. Here, we exploited near-infrared fluorescence (NIRF) molecular probes injected locally at the implant site to perform minimally invasive, simultaneous imaging of inflammation, and infection associated with implanted polymer disks. The hydro-sulfo-Cy5 (H-s-Cy5) probe detected reactive oxygen species associated with inflammatory responses to both aseptic and biofilm-containing implants, whereas diaminocyanine sulfonate selectively detected nitric oxide associated with a biofilm on the biomaterial at acute time points (<4 days). This imaging modality also allows longitudinal monitoring because of high specificity and fast clearance rate of the fluorescent probes. Taken together, these NIRF molecular probes represent a useful tool to directly image inflammatory responses and infections associated with implanted devices for the diagnosis of device-associated inflammation and infection as well as the development of effective therapies.
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Affiliation(s)
- Shalu Suri
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia; Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia
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12
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de Queiroz JDF, Leal AMDS, Terada M, Agnez-Lima LF, Costa I, Pinto NCDS, de Medeiros SRB. Surface modification by argon plasma treatment improves antioxidant defense ability of CHO-k1 cells on titanium surfaces. Toxicol In Vitro 2013; 28:381-7. [PMID: 24296152 DOI: 10.1016/j.tiv.2013.11.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Revised: 10/04/2013] [Accepted: 11/12/2013] [Indexed: 11/30/2022]
Abstract
Titanium is one of the most used materials in implants and changes in its surface can modify the cellular functional response to better implant fixation. An argon plasma treatment generates a surface with improved mechanical proprieties without modifying its chemical composition. Oxidative stress induced by biomaterials is considered one of the major causes of implant failure and studies in this field are fundamental to evaluate the biocompatibility of a new material. Therefore, in this work, induction of oxidative stress by titanium surfaces subjected to plasma treatment (PTTS) was evaluated. The viability of CHO-k1 cells was higher on PTTS discs. Cells grown on titanium surfaces are subjected to intracellular oxidative stress. Titanium discs subjected to the plasma treatment induced less oxidative stress than the untreated ones, which resulted in improved cellular survival. These were associated with improved cellular antioxidant response in Plasma Treated Titanium Surface (PTTS). Furthermore, a decrease in protein and DNA oxidative damage was observed on cells grown on the roughed surface when compared to the smooth one. In conclusion, our data suggest that the treatment of titanium with argon plasma may improve its biocompatible, thus improving its performance as implants or as a scaffold in tissue engineering.
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Affiliation(s)
| | | | - Maysa Terada
- Instituto de Pesquisas Energéticas e Nucleares, IPEN/CNEN-SP, Brazil
| | | | - Isolda Costa
- Instituto de Pesquisas Energéticas e Nucleares, IPEN/CNEN-SP, Brazil
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13
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Şaşmazel HT, Manolache S, Gümüşderelioğlu M. Water/O2-Plasma-Assisted Treatment of PCL Membranes for Biosignal Immobilization. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 20:1137-62. [DOI: 10.1163/156856209x444475] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Hilal Türkoğlu Şaşmazel
- a Atılım University, Department of Materials Engineering, Incek, Gölbaşı, 06836 Ankara, Turkey
| | - Sorin Manolache
- b University of Wisconsin-Madison, Center for Plasma-Aided Manufacturing, Madison, WI 53706, USA
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Niculescu VC, Muresan N, Salageanu A, Tucureanu C, Marinescu G, Chirigiu L, Lepadatu C. Novel 2,3-disubstituted 1,4-naphthoquinone derivatives and their metal complexes – Synthesis and in vitro cytotoxic effect against mouse fibrosarcoma L929 cells. J Organomet Chem 2012. [DOI: 10.1016/j.jorganchem.2011.10.036] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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15
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Wattamwar PP, Hardas SS, Butterfield DA, Anderson KW, Dziubla TD. Tuning of the pro-oxidant and antioxidant activity of trolox through the controlled release from biodegradable poly(trolox ester) polymers. J Biomed Mater Res A 2011; 99:184-91. [PMID: 21976443 DOI: 10.1002/jbm.a.33174] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2011] [Revised: 05/04/2011] [Accepted: 05/17/2011] [Indexed: 11/08/2022]
Abstract
In a variety of biomedical applications (e.g., tissue engineering, drug delivery, etc.), the role of a bioactive material is to serve as a platform by which one can modulate the cellular response into a desired role. Of the methods by which one may achieve this control (e.g., shape, structure, binding, growth factor release), the control of the cellular redox state has been under evaluated. Ideally, the ability to tune the redox state of a cell provides an additional level of control over a variety of cellular responses including, cell differentiation, proliferation, and apoptosis. Yet, in order to achieve such control, it is important to know both the overall oxidative status of the cell and what molecular targets are being oxidized. In this work, poly (trolox ester) nanoparticles were evaluated for their ability to either inhibit or induce cellular oxidative stress in a dose-dependent fashion. This polymer delivery form possessed a unique ability to suppress protein oxidation, a feature not seen in the free drug form, emphasizing the advantage of the delivery/dosage formulation has upon regulating cellular response.
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Affiliation(s)
- Paritosh P Wattamwar
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, USA
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16
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Whelove OE, Cozad MJ, Lee BD, Sengupta S, Bachman SL, Ramshaw BJ, Grant SA. Development and in vitro studies of a polyethylene terephthalate-gold nanoparticle scaffold for improved biocompatibility. J Biomed Mater Res B Appl Biomater 2011; 99:142-9. [DOI: 10.1002/jbm.b.31881] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2010] [Revised: 03/11/2011] [Accepted: 04/20/2011] [Indexed: 11/08/2022]
Affiliation(s)
- Ona E Whelove
- Department of Biological Engineering, University of Missouri, Columbia, Missouri, USA
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17
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Serrano MC, Pagani R, Peña J, Vallet-Regí M, Comas JV, Portolés MT. Progenitor-derived endothelial cell response, platelet reactivity and haemocompatibility parameters indicate the potential of NaOH-treated polycaprolactone for vascular tissue engineering. J Tissue Eng Regen Med 2011; 5:238-47. [DOI: 10.1002/term.314] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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18
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Demirbilek ME, Demirbilek M, Karahaliloğlu Z, Erdal E, Vural T, Yalçın E, Sağlam N, Denkbaş EB. Oxidative Stress Parameters of L929 Cells Cultured on Plasma-Modified PDLLA Scaffolds. Appl Biochem Biotechnol 2011; 164:780-92. [DOI: 10.1007/s12010-011-9173-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2010] [Accepted: 01/18/2011] [Indexed: 02/02/2023]
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19
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Feito MJ, Lozano RM, Alcaide M, Ramírez-Santillán C, Arcos D, Vallet-Regí M, Portolés MT. Immobilization and bioactivity evaluation of FGF-1 and FGF-2 on powdered silicon-doped hydroxyapatite and their scaffolds for bone tissue engineering. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2011; 22:405-416. [PMID: 21132351 DOI: 10.1007/s10856-010-4193-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2010] [Accepted: 11/19/2010] [Indexed: 05/30/2023]
Abstract
Fibroblast growth factors (FGFs) are polypeptides that control the proliferation and differentiation of various cell types including osteoblasts. FGFs are also strong inducers of angiogenesis, necessary to obtain oxygen and nutrients during tissue repair. With the aim to incorporate these desirable FGF biological properties into bioceramics for bone repair, silicon substituted hydroxyapatites (Si-HA) were used as materials to immobilize bioactive FGF-1 and FGF-2. Thus, the binding of these growth factors to powdered Si-HA and Si-HA scaffolds was carried out efficiently in the present study and both FGFs maintained its biological activity on osteoblasts after its immobilization. The improvement of cell adhesion and proliferation onto Si-HA scaffolds suggests the potential utility of these FGF/scaffolds for bone tissue engineering.
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Affiliation(s)
- María José Feito
- Department of Biochemistry and Molecular Biology I, Faculty of Chemistry, Universidad Complutense, 28040, Madrid, Spain.
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20
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Yen C, He H, Fei Z, Zhang X, Lee LJ, Ho WSW. Surface Modification of Nanoporous Poly(ϵ-caprolactone) Membrane with Poly(ethylene glycol) to Prevent Biofouling: Part II. Effects of Graft Density and Chain Length. INT J POLYM MATER PO 2010. [DOI: 10.1080/00914037.2010.504164] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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21
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Photodynamic therapy associating Photogem® and blue LED on L929 and MDPC-23 cell culture. Cell Biol Int 2010; 34:343-51. [DOI: 10.1042/cbi20090032] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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22
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Alcaide M, Portolés P, López-Noriega A, Arcos D, Vallet-Regí M, Portolés MT. Interaction of an ordered mesoporous bioactive glass with osteoblasts, fibroblasts and lymphocytes, demonstrating its biocompatibility as a potential bone graft material. Acta Biomater 2010; 6:892-9. [PMID: 19766743 DOI: 10.1016/j.actbio.2009.09.008] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2009] [Revised: 09/09/2009] [Accepted: 09/15/2009] [Indexed: 11/15/2022]
Abstract
Ordered mesoporous 85SiO(2)-10CaO-5P(2)O(5) bioactive glass (MBG85) is an excellent candidate as a graft for bone tissue regeneration, owing to its excellent textured properties, structural characteristics and crystalline apatite rate formation. To assess MBG85 biocompatibility, different parameters have been evaluated (cell morphology, size/complexity, proliferation, viability, cell cycle, reactive oxygen species content, lactate dehydrogenase release) using human Saos-2 osteoblasts after treatment with either MBG85 extracts or 1% MBG85 directly added to cells. The osteoblast response to MBG85 was compared with L929 fibroblast behaviour after the same treatment. The high cell viability observed and the absence of signs of cell damage in both cell types demonstrates MBG85 biocompatibility. Only a cytostatic effect was observed through the reduction of cell proliferation, related with the initial Ca elution, whereas Si leaching did not result into any negative effect. In vitro lymphocytic proliferation analysis was also carried out with SR.D10 clone after treatment with either MBG85 extracts or culture supernatants of L929 fibroblasts previously treated with 1% MBG85 (cell-conditioned extracts). The absence of modification of in vitro T-cell response underlines the biocompatibility of MBG85 and its potential application in the field of bone and dental grafting.
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Affiliation(s)
- M Alcaide
- Department of Biochemistry and Molecular Biology I, Faculty of Chemistry, Universidad Complutense, 28040 Madrid, Spain
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23
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Serrano MC, Pagani R, Vallet-Regí M, Peña J, Comas JV, Portolés MT. Nitric oxide production by endothelial cells derived from blood progenitors cultured on NaOH-treated polycaprolactone films: A biofunctionality study. Acta Biomater 2009; 5:2045-53. [PMID: 19332384 DOI: 10.1016/j.actbio.2009.02.034] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2008] [Revised: 12/18/2008] [Accepted: 02/27/2009] [Indexed: 12/26/2022]
Abstract
Poly(epsilon-caprolactone) (PCL) is a biodegradable polyester whose biocompatibility has been widely demonstrated both in vivo and in vitro. In the last few years, our group has confirmed that NaOH-treated PCL films can serve as a suitable biomaterial for vascular tissue engineering by supporting the culture of primary vascular cells and, more recently, endothelial-like EC(2) cells derived from endothelial progenitor cells (EPC). In the present study, NO production in basal conditions and after stimulation with different agents has been evaluated and related to the reactive oxygen species (ROS) content and the intracellular calcium levels on EC(2) cells cultured on NaOH-treated PCL films. The results obtained demonstrate that EC(2) seeded on NaOH-treated PCL films enhance the basal NO levels and show a faster, more intense response to physiological stimuli such as VEGF, bradykinin and thrombin than vein endothelial cells (ECv). This result could be indicative of a better capacity of EC(2) cells to maintain their endothelial functionality when seeded on polymers. On the other hand, the culture of both EC(2) and ECv cells on NaOH-treated PCL films induces a significant increase in both ROS content and intracellular calcium that is balanced out through the stimulation of NO production in these cells. In conclusion, these results demonstrate the ability of NaOH-treated PCL films to support endothelial cell production of nitric oxide and reinforce the idea of considering the endothelial-like EC(2) cells derived from blood progenitors as an adequate source of endothelial cells to functionalize vascular grafts. Furthermore, NaOH-treated PCL films could be considered as a promising cellular NO production-inducing biomaterial for vascular tissue engineering applications.
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24
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Serrano MC, Pagani R, Ameer GA, Vallet-Regí M, Portolés MT. Endothelial cells derived from circulating progenitors as an effective source to functional endothelialization of NaOH-treated poly(ε-caprolactone) films. J Biomed Mater Res A 2008; 87:964-71. [DOI: 10.1002/jbm.a.31728] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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25
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Serrano MC, Portolés MT, Pagani R, de Guinoa JS, Ruiz-Hernández E, Arcos D, Vallet-Regí M. In Vitro Positive Biocompatibility Evaluation of Glass–Glass Ceramic Thermoseeds for Hyperthermic Treatment of Bone Tumors. Tissue Eng Part A 2008; 14:617-27. [DOI: 10.1089/tea.2007.0205] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Affiliation(s)
- M. Concepción Serrano
- Department of Biochemistry and Molecular Biology I, Faculty of Chemistry, Universidad Complutense, Madrid, Spain
| | - M. Teresa Portolés
- Department of Biochemistry and Molecular Biology I, Faculty of Chemistry, Universidad Complutense, Madrid, Spain
| | - Raffaella Pagani
- Department of Biochemistry and Molecular Biology I, Faculty of Chemistry, Universidad Complutense, Madrid, Spain
| | - Julia Sáez de Guinoa
- Department of Biochemistry and Molecular Biology I, Faculty of Chemistry, Universidad Complutense, Madrid, Spain
| | - Eduardo Ruiz-Hernández
- Department of Inorganic and Bioinorganic Chemistry, Faculty of Pharmacy, Universidad Complutense, Madrid, Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, Madrid, Spain
| | - Daniel Arcos
- Department of Inorganic and Bioinorganic Chemistry, Faculty of Pharmacy, Universidad Complutense, Madrid, Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, Madrid, Spain
| | - María Vallet-Regí
- Department of Inorganic and Bioinorganic Chemistry, Faculty of Pharmacy, Universidad Complutense, Madrid, Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, Madrid, Spain
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Karakecili A, Satriano C, Gumusderelioglu M, Marletta G. Relationship between the fibroblastic behaviour and surface properties of RGD-immobilized PCL membranes. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2007; 18:317-9. [PMID: 17323164 DOI: 10.1007/s10856-006-0695-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2006] [Accepted: 08/28/2006] [Indexed: 05/14/2023]
Abstract
In this study, poly-epsilon-caprolactone (PCL) membranes were modified with the cell adhesive peptide RGD by chemical immobilization technique. The roughness and hydrophilicity were increased after RGD immobilization and an improved cell attachment was observed.
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Affiliation(s)
- A Karakecili
- Chemical Engineering Dept., Hacettepe University, 06532, Beytepe, Ankara, Turkey
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27
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Serrano MC, Pagani R, Manzano M, Comas JV, Portolés MT. Mitochondrial membrane potential and reactive oxygen species content of endothelial and smooth muscle cells cultured on poly(epsilon-caprolactone) films. Biomaterials 2006; 27:4706-14. [PMID: 16730794 DOI: 10.1016/j.biomaterials.2006.05.007] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2006] [Accepted: 05/10/2006] [Indexed: 11/25/2022]
Abstract
A transitory but significant stimulation of mitochondrial activity, increase of reactive oxygen species (ROS) and oxidative stress were previously observed in L929 fibroblasts cultured on poly(epsilon-caprolactone) (PCL) films. ROS, mainly formed in mitochondria, play a physiological role but an excessive production can promote endothelial dysfunction, cause oxidative injury to vascular cells, oxidize lipoproteins and accelerate atherothrombogenesis. On the other hand, mitochondria have a crucial position in programmed cell death control and are responsible for ATP synthesis through the coupling of oxidative phosphorylation to respiration. This coupling requires the existence of a mitochondrial membrane potential (Deltapsi(m)). The aim of the present study was to evaluate by flow cytometry the ROS content and Deltapsi(m) of both endothelial (EC) and smooth muscle cells (SMC) cultured on PCL films as a potential substrate for vascular graft development. Cell size, internal complexity and cell cycle were also analyzed to detect the possible appearance of the subG(1) cell fraction, characteristic of apoptotic cells. The effect of treating PCL films with NaOH before culture was also studied. PCL decreases the ROS content of EC during the culture but produces an increase of these levels in SMC after 7 days. PCL also induces variations of Deltapsi(m) which show a significant parallelism with the changes observed in ROS levels proving the importance and sensitivity of these measurements as indicators of the mitochondrial function. The treatment of PCL with NaOH decreases these effects demonstrating the benefits of increasing the surface hydrophilicity before cell culture which improves cell adhesion and proliferation and reduces oxidative stress. Since no important changes have been detected in subG(1) fraction of EC and SMC cultured on either PCL or PCL-NaOH, the changes of Deltapsi(m) observed in the present study cannot be related to apoptosis. These results confirm the potential utility of PCL as a suitable scaffold in Vascular Tissue Engineering.
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Affiliation(s)
- M Concepción Serrano
- Department of Biochemistry and Molecular Biology I, Faculty of Chemistry, Universidad Complutense, 28040 Madrid, Spain
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28
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Peña J, Corrales T, Izquierdo-Barba I, Serrano MC, Portolés MT, Pagani R, Vallet-Regí M. Alkaline-treated poly(ε-caprolactone) films: Degradation in the presence or absence of fibroblasts. J Biomed Mater Res A 2006; 76:788-97. [PMID: 16345086 DOI: 10.1002/jbm.a.30547] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
In the first stage, we observed the study of the degradation behavior of alkaline-treated poly(epsilon-caprolactone) (PCL) in two biologically-related media: phosphate buffered saline (PBS) and Dulbecco's modified Eagle's medium (DMEM) for 18 months, finding a much accelerated degradation in the last one. As expected, the degradation in the presence of cells is much pronounced even considering that the study is limited to 6 months. The characterization of the degraded substrates by chemiluminescence (CL) allows to explain the modifications of the substrate and their relations with transitory oxidative stress phenomena described in the fibroblasts seeded onto the PCL membranes.
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Affiliation(s)
- Juan Peña
- Dpto Química Inorgánica y Bioinorgánica Fac Farmacia, Universidad Complutense de Madrid, UCM, Ciudad Universitaria s/n, 28040 Madrid, Spain
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29
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Koopman WJH, Verkaart S, van Emst-de Vries SE, Grefte S, Smeitink JAM, Willems PHGM. Simultaneous quantification of oxidative stress and cell spreading using 5-(and-6)-chloromethyl-2′,7′-dichlorofluorescein. Cytometry A 2006; 69:1184-92. [PMID: 17066472 DOI: 10.1002/cyto.a.20348] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
BACKGROUND Mitochondrial dysfunction may lead to increased oxidative stress and consequent changes in cell spreading. Here, we describe and validate a novel method for simultaneous quantification of these two parameters. METHODS Human skin fibroblasts were loaded with 5-(and-6)-chloromethyl-2',7'-dichlorodihydrofluorescein (CM-H(2)DCF), and its oxidative conversion into CM-DCF was monitored as a function of time by video-rate confocal microscopy and real-time image averaging. Cell size was determined after binarization of the acquired images. RESULTS At the lowest practical laser output, CM-DCF formation occurred with zero order kinetics, indicating that [CM-H(2)DCF] was not rate-limiting and that the rate of [CM-DCF] formation (V(CM-DCF)) was a function of the cellular oxidant level. Analysis of fibroblasts of a healthy control subject and a patient with a deficiency of NADH:ubiquinone oxidoreductase, the first complex of the oxidative phosphorylation system, revealed a significant increase in cellular oxidant level in the latter cells that was, however, not accompanied by a change in cell spreading. Conversely, chronic treatment with 6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid (Trolox), a derivative of vitamin E, markedly decreased the oxidant level and cell spreading in both control and patient fibroblasts. CONCLUSIONS We present a reliable method for simultaneous quantification of oxidant levels and cell spreading in living cells.
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Affiliation(s)
- Werner J H Koopman
- Department of Membrane Biochemistry, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
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