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Díez-Quijada L, Puerto M, Gutiérrez-Praena D, Llana-Ruiz-Cabello M, Jos A, Cameán AM. Microcystin-RR: Occurrence, content in water and food and toxicological studies. A review. ENVIRONMENTAL RESEARCH 2019; 168:467-489. [PMID: 30399604 DOI: 10.1016/j.envres.2018.07.019] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 07/09/2018] [Accepted: 07/09/2018] [Indexed: 06/08/2023]
Abstract
Microcystins (MCs) are hepatotoxins, produced by various species of cyanobacteria, whose occurrence is increasing worldwide owing to climate change and anthropogenic activities. More than 100 variants have been reported, and among them MC-LR is the most extensively studied, but there are other MC congeners that deserve to be investigated. The need for data to characterize the toxicological profile of MC variants other than MC-LR has been identified in order to improve risk assessment in humans and wildlife. Accordingly, the aim of this study was to evaluate the information available in the scientific literature dealing with MC-RR, as this congener is the second most common cyanotoxin in the environment. The review focuses on aspects such as occurrence in water and food, and toxicity studies both in vitro and in vivo. It reveals that, although MC-RR is a real hazard with a high exposure potential in some countries, little is known yet about its specific toxicological properties that differ from those of MC-LR, and important aspects such as genotoxicity and chronic effects have not yet been sufficiently addressed.
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Díez-Quijada L, Prieto AI, Guzmán-Guillén R, Jos A, Cameán AM. Occurrence and toxicity of microcystin congeners other than MC-LR and MC-RR: A review. Food Chem Toxicol 2018; 125:106-132. [PMID: 30597222 DOI: 10.1016/j.fct.2018.12.042] [Citation(s) in RCA: 88] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Revised: 11/29/2018] [Accepted: 12/25/2018] [Indexed: 12/11/2022]
Abstract
The occurrence of cyanobacterial toxins is being increasingly reported. This is a reason for concern as they can induce toxic effects both in humans and in the environment. Among them, microcystins (MCs) are the best described and most diverse group of cyanobacterial toxins, and MC-LR and MC-RR are the congeners most widely investigated. However, the number of MC variants has also increased in recent years. Some of these minority variants have been shown to have a different toxicokinetic and toxicodynamic profile, but research focused on them is still limited. Moreover, in some water bodies these minority variants can be the predominant toxins. Nonetheless, MC-LR is the only one used for risk evaluation purposes at present. In order to contribute to more realistic risk assessments in the future, the aim of this review was to compile the available information in the scientific literature regarding the occurrence and concentration of minority MCs in water and food samples, and their toxic effects. The data retrieved demonstrate the congener-specific toxicity of MCs, as well as many data gaps in relation to analytical or mechanistic aspects, among others. Therefore, further research is needed to improve the toxicological characterization of these toxins and the exposure scenarios.
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Pichardo S, Cameán AM, Jos A. In Vitro Toxicological Assessment of Cylindrospermopsin: A Review. Toxins (Basel) 2017; 9:toxins9120402. [PMID: 29258177 PMCID: PMC5744122 DOI: 10.3390/toxins9120402] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 12/12/2017] [Accepted: 12/13/2017] [Indexed: 12/29/2022] Open
Abstract
Cylindrospermopsin (CYN) is a cyanobacterial toxin that is gaining importance, owing to its increasing expansion worldwide and the increased frequency of its blooms. CYN mainly targets the liver, but also involves other organs. Various mechanisms have been associated with its toxicity, such as protein synthesis inhibition, oxidative stress, etc. However, its toxic effects are not yet fully elucidated and additional data for hazard characterization purposes are required. In this regard, in vitro methods can play an important role, owing to their advantages in comparison to in vivo trials. The aim of this work was to compile and evaluate the in vitro data dealing with CYN available in the scientific literature, focusing on its toxicokinetics and its main toxicity mechanisms. This analysis would be useful to identify research needs and data gaps in order to complete knowledge about the toxicity profile of CYN. For example, it has been shown that research on various aspects, such as new emerging toxicity effects, the toxicity of analogs, or the potential interaction of CYN with other cyanotoxins, among others, is still very scarce. New in vitro studies are therefore welcome.
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Llana-Ruiz-Cabello M, Maisanaba S, Puerto M, Pichardo S, Jos A, Moyano R, Cameán A. A subchronic 90-day oral toxicity study of Origanum vulgare essential oil in rats. Food Chem Toxicol 2017; 101:36-47. [DOI: 10.1016/j.fct.2017.01.001] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Revised: 12/23/2016] [Accepted: 01/03/2017] [Indexed: 01/28/2023]
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Camean A, Guillen RG, Praena DG, Puerto M, Prieto A, Pichardo S, Jos A. Comparative antioxidant potential of N-acetylcysteine, l-carnitine and Vitamin E to prevent cylindrospermopsin effects in tilapia fish. Toxicol Lett 2016. [DOI: 10.1016/j.toxlet.2016.06.1627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Jos A, Maisanaba S, Beneyto MJ, Cameán A. Change in the gene expression of HepG2 cells by the exposure to clays with a potential use in the food industry. Toxicol Lett 2016. [DOI: 10.1016/j.toxlet.2016.06.1654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Maisanaba S, Llana-Ruiz-Cabello M, Gutiérrez-Praena D, Pichardo S, Puerto M, Prieto AI, Jos A, Cameán AM. New advances in active packaging incorporated with essential oils or their main components for food preservation. FOOD REVIEWS INTERNATIONAL 2016. [DOI: 10.1080/87559129.2016.1175010] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Martín-Cameán A, Jos A, Puerto M, Calleja A, Iglesias-Linares A, Solano E, Cameán AM. In vivo determination of aluminum, cobalt, chromium, copper, nickel, titanium and vanadium in oral mucosa cells from orthodontic patients with mini-implants by Inductively coupled plasma-mass spectrometry (ICP-MS). J Trace Elem Med Biol 2015; 32:13-20. [PMID: 26302907 DOI: 10.1016/j.jtemb.2015.05.001] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Revised: 04/22/2015] [Accepted: 05/12/2015] [Indexed: 11/17/2022]
Abstract
Miniscrews are used as orthodontic anchorage devices in the dentistry clinical practice but the in vivo metallic release from these structures has been not previously investigated. The aim of this study was to determine the content of Al, Co, Cr, Cu, Ni, Ti and V in oral mucosa cells of control subjects, patients under orthodontic treatment and with both, orthodontic treatment and miniscrew, in order to know the contribution of these mini-implants to the total metallic content. ICP-MS measurements revealed the following ascending order: Cr<Ni<Ti<Cu<Al, and Co and V were practically undetected. Significant differences in comparison to the control group were found for Cu in the orthodontic group, and for Ni in both, orthodontic and orthodontic+miniscrew groups. Potential correlations among metallic elements and with some clinical factors were also explored. These findings suggest that miniscrews do not increase significantly the metal release.
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Mellado P, Prieto A, Puerto M, Pichardo S, Guillamón E, Martín-Cameán A, Jos A, Cameán A. Mammalian Erythrocytes Micronucleus test after acute exposure of Wistar rats to PTSO. Toxicol Lett 2015. [DOI: 10.1016/j.toxlet.2015.08.273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Maisanaba S, Gutiérrez-Praena D, Pichardo S, Jordá-Beneyto M, Cameán A, Jos A. Cytotoxic profile of a silane-modified montmorillonite intended for food packaging. Toxicol Lett 2015. [DOI: 10.1016/j.toxlet.2015.08.272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Maisanaba S, Zegura B, Jordá-Beneyto M, Jos A. The impact of novel clays destined to food packaging industry on the genomic instability of human hepatoma cells. Toxicol Lett 2015. [DOI: 10.1016/j.toxlet.2015.08.270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Maisanaba S, Prieto A, Pichardo S, Jordá-Beneyto M, Aucejo S, Cameán A, Jos A. Cytotoxicity and mutagenicity assessment in HepG2 cells and Salmonella typhimurium strains exposed to a silane-modified clay as a new food contact material. Toxicol Lett 2015. [DOI: 10.1016/j.toxlet.2015.08.271] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Martín-Cameán A, Jos A, Cameán AM, Solano E, Iglesias-Linares A. Genotoxic and cytotoxic effects and gene expression changes induced by fixed orthodontic appliances in oral mucosa cells of patients: a systematic review. Toxicol Mech Methods 2015; 25:440-7. [PMID: 26156198 DOI: 10.3109/15376516.2015.1062951] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
CONTEXT The accumulation of chronic or severe acute DNA and cellular damage in oral mucosa cells is one of the main factors that help initiate a wide range of malignant lesions in the oral cavity. There has been considerable controversy in the literature about the effect of such sustained genotoxic and cytotoxic damage to oral mucosa cells. OBJECTIVE The aim of this systematic review, reported in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, is to investigate the effects of such interventions. METHODS Electronic and manual searches were performed (15 May 2015) for Randomized Clinical Trials/quasi-Randomized Clinical Trials that analyzed the genotoxic/cytotoxic effects of these types of oral appliances in humans. A primary outcome (cell/DNA damage) and a number of secondary outcomes were examined. Two reviewers carried out the study selection and performed a "risk of bias" assessment [Cochrane Collaboration's tool]. Wherever possible the meta-analysis was conducted on homogenous groups. RESULTS From the electronic search (2797), 6 studies met the eligibility criteria. Most studies (5/6) observed significant differences in most comparisons at the short-term (1-3 months) and long-term (24-48 months) evaluations, with respect to critically acute genotoxic/cytotoxic effects. Some of the studies (2/3) concluded that the post-removable effects at DNA/cellular levels were not significant (p > 0.05) with respect to the controls. CONCLUSIONS Acute DNA/cellular damage in oral mucosa cells is induced by orthodontic appliances. Nevertheless, even though these effects were no longer detected after removing the appliances, more rigorous RCTs are needed to explore the extent to which acquired damage can be observed in the oral mucosa.
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Llana-Ruiz-Cabello M, Pichardo S, Maisanaba S, Puerto M, Prieto AI, Gutiérrez-Praena D, Jos A, Cameán AM. In vitro toxicological evaluation of essential oils and their main compounds used in active food packaging: A review. Food Chem Toxicol 2015; 81:9-27. [PMID: 25865936 DOI: 10.1016/j.fct.2015.03.030] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Revised: 03/30/2015] [Accepted: 03/31/2015] [Indexed: 01/19/2023]
Abstract
Essential oils (EOs) and their main constituent compounds have been extensively investigated due to their application in the food industry for improving the shelf life of perishable products. Although they are still not available for use in food packaging in the market in Europe, considerable research in this field has been carried out recently. The safety of these EOs should be guaranteed before being commercialized. The aim of this work was to review the scientific publications, with a primary focus on the last 10 years, with respect to different in vitro toxicological aspects, mainly focussed on mutagenicity/genotoxicity. In general, fewer genotoxic studies have been reported on EOs in comparison to their main components, and most of them did not show mutagenic activity. However, more studies are needed in this field since the guidelines of the European Food Safety Authority have not always been followed accurately. The mutagenic/genotoxic activities of these substances have been related to metabolic activation. Therefore, in vivo tests are required to confirm the absence of genotoxic effects. Considering the great variability of the EOs and their main compounds, a case-by-case evaluation is needed to assure their safe use in food packaging.
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Maisanaba S, Pichardo S, Puerto M, Gutiérrez-Praena D, Cameán AM, Jos A. Toxicological evaluation of clay minerals and derived nanocomposites: a review. ENVIRONMENTAL RESEARCH 2015; 138:233-254. [PMID: 25732897 DOI: 10.1016/j.envres.2014.12.024] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Revised: 12/22/2014] [Accepted: 12/24/2014] [Indexed: 05/29/2023]
Abstract
Clays and clay minerals are widely used in many facets of our society. This review addresses the main clays of each phyllosilicate groups, namely, kaolinite, montmorillonite (Mt) and sepiolite, placing special emphasis on Mt and kaolinite, which are the clays that are more frequently used in food packaging, one of the applications that are currently exhibiting higher development. The improvements in the composite materials obtained from clays and polymeric matrices are remarkable and well known, but the potential toxicological effects of unmodified or modified clay minerals and derived nanocomposites are currently being investigated with increased interest. In this sense, this work focused on a review of the published reports related to the analysis of the toxicological profile of commercial and novel modified clays and derived nanocomposites. An exhaustive review of the main in vitro and in vivo toxicological studies, antimicrobial activity assessments, and the human and environmental impacts of clays and derived nanocomposites was performed. From the analysis of the scientific literature different conclusions can be derived. Thus, in vitro studies suggest that clays in general induce cytotoxicity (with dependence on the clay, concentration, experimental system, etc.) with different underlying mechanisms such as necrosis/apoptosis, oxidative stress or genotoxicity. However, most of in vivo experiments performed in rodents showed no clear evidences of systemic toxicity even at doses of 5000mg/kg. Regarding to humans, pulmonary exposure is the most frequent, and although clays are usually mixed with other minerals, they have been reported to induce pneumoconiosis per se. Oral exposure is also common both intentionally and unintentionally. Although they do not show a high toxicity through this pathway, toxic effects could be induced due to the increased or reduced exposure to mineral elements. Finally, there are few studies about the effects of clay minerals on wildlife, with laboratory trials showing contradictory outcomes. Clay minerals have different applications in the environment, thus with a strict control of the concentrations used, they can provide beneficial uses. Despite the extensive number of reports available, there is also a need of systematic in vitro-in vivo extrapolation studies, with still scarce information on toxicity biomarkers such as inmunomodulatory effects or alteration of the genetic expression. In conclusion, a case by case toxicological evaluation is required taking into account that different clays have their own toxicological profiles, their modification can change this profile, and the potential increase of the human/environmental exposure to clay minerals due to their novel applications.
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Maisanaba S, Cabral-Monge MC, Gutiérrez-Praena D, Jordá-Beneyto M, Aucejo S, Jos A. Flow cytometry study of the Caco-2 cell line exposed to a silane-modified clay. Toxicol Lett 2014. [DOI: 10.1016/j.toxlet.2014.06.602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Maisanaba S, Prieto AI, Pichardo S, Jordá-Beneyto M, Cameán AM, Jos A. Detection of mutagenic activity of novel modified clays intended to a nanocomposite material by the Ames test. Toxicol Lett 2014. [DOI: 10.1016/j.toxlet.2014.06.597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Maisanaba S, Pichardo S, Jordá-Beneyto M, Cameán AM, Aucejo S, Jos A. ROS production and GSH content of Caco-2 cells exposed to silane-modified clays. Toxicol Lett 2014. [DOI: 10.1016/j.toxlet.2014.06.601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Maisanaba S, Gutiérrez-Praena D, Puerto M, Ruiz-Cabello ML, Pichardo S, Jordá-Beneyto M, Jos A. Evaluation of the oxidative response in Wistar rats exposed for 90 days to an extract of a nanocomposite material. Toxicol Lett 2014. [DOI: 10.1016/j.toxlet.2014.06.600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Maisanaba S, Pichardo S, Jordá-Beneyto M, Aucejo S, Jos A. Cytotoxicity evaluation of two novel silane-modified clays for their use in nanocomposite packaging. Toxicol Lett 2014. [DOI: 10.1016/j.toxlet.2014.06.599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Martín-Cameán A, Jos A, Calleja A, Gil F, Iglesias-Linares A, Solano E, Cameán AM. Development and validation of an inductively coupled plasma mass spectrometry (ICP-MS) method for the determination of cobalt, chromium, copper and nickel in oral mucosa cells. Microchem J 2014. [DOI: 10.1016/j.microc.2013.12.009] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Puerto M, Jos A, Pichardo S, Moyano R, Blanco A, Cameán AM. Acute exposure to pure cylindrospermopsin results in oxidative stress and pathological alterations in tilapia (Oreochromis niloticus). ENVIRONMENTAL TOXICOLOGY 2014; 29:371-385. [PMID: 22331699 DOI: 10.1002/tox.21764] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2011] [Revised: 01/11/2012] [Accepted: 01/12/2012] [Indexed: 05/31/2023]
Abstract
Cylindrospermopsin (CYN) is increasingly recognized as a potential threat to drinking water safety, due to its ubiquity. This cyanotoxin has been found to cause toxic effects in mammals, and although fish could be in contact with this toxin, acute toxicity studies on fish are nonexistent. This is the first study showing that single doses of CYN pure standard (200 or 400 μg CYN/kg fish bw) by oral route (gavage) generate histopathological effects in fish (Tilapia-Oreochromis niloticus) exposed to the toxin under laboratory condition. Among the morphological changes, disorganized parenchymal architecture in the liver, dilated Bowman's space in the kidney, fibrolysis in the heart, necrotic enteritis in the intestines, and hemorrhages in the gills, were observed. Moreover, some oxidative stress biomarkers in the liver and kidney of tilapias were altered. Thus, CYN exposure induced increased protein oxidation products in both organs, NADPH oxidase activity was significantly increased with the kidney being the most affected organ, and decreased GSH contents were also detected in both organs, at the higher dose assayed.
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Martín-Cameán A, Molina-Villalba I, Jos A, Iglesias-Linares A, Solano E, Cameán AM, Gil F. Biomonitorization of chromium, copper, iron, manganese and nickel in scalp hair from orthodontic patients by atomic absorption spectrometry. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2014; 37:759-771. [PMID: 24632012 DOI: 10.1016/j.etap.2014.01.025] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Accepted: 01/31/2014] [Indexed: 06/03/2023]
Abstract
The study was aimed to assess Cu, Cr, Fe, Mn and Ni levels in human scalp hair from a broad population group treated with orthodontic appliances (n=70) to determine, whether the concentration of a given metal was significantly influenced by the orthodontic treatment in comparison to control group (n=56). Levels of metal compounds were determined by atomic absorption spectrometry. The mean, ranges, median and 5th and 95th percentiles of metals analyzed in hair that were hypothesized to be systemically absorbed from stainless steel, are provided. The influence of individual factors on metal concentrations was considered (gender, age), and inter-element interactions were studied by evaluation of correlation coefficients between elements, as well as by multiple regression analysis. Differences in the content of metals in hair were only significantly increased for Mn when compared to the control group, but their levels were of the same magnitude to other control populations, and consequently, no risks linked to the treatment have been found. The orthodontic treatment increased significantly Mn levels in young patients (<20 years old) when compared with control group. Scalp hair analysis is a good method to investigate the release of the elements from fixed orthodontic appliances.
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Jorda-Beneyto M, Ortuño N, Devis A, Aucejo S, Puerto M, Gutiérrez-Praena D, Houtman J, Pichardo S, Maisanaba S, Jos A. Use of nanoclay platelets in food packaging materials: technical and cytotoxicity approach. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2014; 31:354-63. [DOI: 10.1080/19440049.2013.874045] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Maisanaba S, Gutiérrez-Praena D, Puerto M, Llana-Ruiz-Cabello M, Pichardo S, Moyano R, Blanco A, Jordá-Beneyto M, Jos A. In vivo toxicity evaluation of the migration extract of an organomodified clay-poly(lactic) acid nanocomposite. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2014; 77:731-746. [PMID: 24839927 DOI: 10.1080/15287394.2014.890987] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The food packaging industry is in continuous development in order to obtain more secure and stable food and beverages. The incorporation of inorganic and organic materials with plastic polymers leads to polymer composites. Among the inorganic compounds, clays such as montmorillonite (MTT) and its derivatives are of great interest due to their advantageous properties. The Technological Institute of Packaging, Transport,and Logistics (ITENE) developed a novel nanocomposite based on a poly(lactic) acid (PLA) polymer using an MMT derivative, named Clay1, as filler, to be used in the beverage industry. The improvement of the technological properties of this new material was demonstrated, but safety issues are also of concern. In the present study, a histopathological examination by optical and electron microscopy of organs from Wistar rats exposed for 90 d to a migration extract of PLA-Clay1 nanocomposite was carried out. Moreover, different clinical biochemistry, inflammation,and oxidative stress biomarkers were determined. Results showed no apparent evidence of damage, indicating that this nanocomposite has a good profile to be used in the food packaging industry, although further research is still needed.
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