Mining a Nanoparticle Dataset, Compiled Within the MODENA-COST Action

2021 ◽  
pp. 1706-1724
Author(s):  
Sabine Van Miert ◽  
Jan Creylman ◽  
Geert R. Verheyen
Keyword(s):  
Chemical Properties ◽  
In Vitro Testing ◽  
Cost Action ◽  
Robust Model ◽  
Physico Chemical ◽  
Classification And Regression ◽  
Toxic Potential ◽  
Sheer Number

Engineered nanomaterials (ENM) have new or enhanced physico-chemical properties compared to their micron-sized counterparts, but may also have an increased toxic potential. Animal and in vitro testing are typically employed to investigate the toxic effects of (nano)materials. The sheer number of ENMs and their physico-chemical parameters make it impossible to only use in vivo and in vitro testing, and modelling technologies are also deployed to find relationships between ENM parameters and toxicity. A heterogenous dataset containing information on 192 nanoparticle endpoints was compiled within the MODENA COST-Action consortium. Here, the available data was mined to identify relationships between nanoparticle properties and cell-death as measured with four cytotoxicity assays. ANOVA, collinearity analyses and classification and regression trees gave indications on potential relations between the NP-properties and toxicity, but could not deliver a robust model. More information and datapoints are necessary to build well-validated models.

Mining a Nanoparticle Dataset, Compiled Within the MODENA-COST Action

2019 ◽  
Vol 4 (1) ◽  
pp. 1-17
Author(s):  
Sabine Van Miert ◽  
Jan Creylman ◽  
Geert R. Verheyen
Keyword(s):  
Chemical Properties ◽  
In Vitro Testing ◽  
Nano Materials ◽  
Cost Action ◽  
Robust Model ◽  
Physico Chemical ◽  
Toxic Potential ◽  
Sheer Number

Engineered nanomaterials (ENM) have new or enhanced physico-chemical properties compared to their micron-sized counterparts, but may also have an increased toxic potential. Animal and in vitro testing are typically employed to investigate the toxic effects of (nano)materials. The sheer number of ENMs and their physico-chemical parameters make it impossible to only use in vivo and in vitro testing, and modelling technologies are also deployed to find relationships between ENM parameters and toxicity. A heterogenous dataset containing information on 192 nanoparticle endpoints was compiled within the MODENA COST-Action consortium. Here, the available data was mined to identify relationships between nanoparticle properties and cell-death as measured with four cytotoxicity assays. ANOVA, collinearity analyses and classification and regression trees gave indications on potential relations between the NP-properties and toxicity, but could not deliver a robust model. More information and datapoints are necessary to build well-validated models.

scholarly journals In Vitro Physico-Chemical Characterization and Standardized In Vivo Evaluation of Biocompatibility of a New Synthetic Membrane for Guided Bone Regeneration

Materials ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1186
Author(s):  
Lívia da Costa Pereira ◽  
Carlos Fernando de Almeida Barros Mourão ◽  
Adriana Terezinha Neves Novellino Alves ◽  
Rodrigo Figueiredo de Brito Resende ◽  
Marcelo José Pinheiro Guedes de Uzeda ◽  
...  
Keyword(s):  
Bone Regeneration ◽  
Chemical Properties ◽  
Chemical Characterization ◽  
Guided Bone Regeneration ◽  
Tissue Reaction ◽  
In Vivo Evaluation ◽  
Physico Chemical ◽  
Tissue Reactions

This study’s aim was to evaluate the biocompatibility and bioabsorption of a new membrane for guided bone regeneration (polylactic-co-glycolic acid associated with hydroxyapatite and β-tricalcium phosphate) with three thicknesses (200, 500, and 700 µm) implanted in mice subcutaneously. Scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and the quantification of carbon, hydrogen and nitrogen were used to characterize the physico-chemical properties. One hundred Balb-C mice were divided into 5 experimental groups: Group 1—Sham (without implantation); Group 2—200 μm; Group 3—500 μm; Group 4—700 μm; and Group 5—Pratix®. Each group was subdivided into four experimental periods (7, 30, 60 and 90 days). Samples were collected and processed for histological and histomorphometrical evaluation. The membranes showed no moderate or severe tissue reactions during the experimental periods studied. The 500-μm membrane showed no tissue reaction during any experimental period. The 200-μm membrane began to exhibit fragmentation after 30 days, while the 500-μm and 700-µm membranes began fragmentation at 90 days. All membranes studied were biocompatible and the 500 µm membrane showed the best results for absorption and tissue reaction, indicating its potential for clinical guided bone regeneration.

scholarly journals Optimization of Innovative Three-Dimensionally-Structured Hybrid Vesicles to Improve the Cutaneous Delivery of Clotrimazole for the Treatment of Topical Candidiasis

Pharmaceutics ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 263 ◽  
Author(s):  
Maria Letizia Manca ◽  
Iris Usach ◽  
José Esteban Peris ◽  
Antonella Ibba ◽  
Germano Orrù ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Chemical Properties ◽  
Chemical Characterization ◽  
Yeast Cells ◽  
Unilamellar Vesicles ◽  
Transmission Electron ◽  
Physico Chemical

New three-dimensionally-structured hybrid phospholipid vesicles, able to load clotrimazole in a high amount (10 mg/mL), were obtained for the first time in this work by significantly reducing the amount of water (≤10%), which was replaced with a mixture of glycerol and ethanol (≈90%). A pre-formulation study was carried out to evaluate the effect of both the composition of the hydrating medium and the concentration of the phospholipid on the physico-chemical properties of hybrid vesicles. Four different three-dimensionally-structured hybrid vesicles were selected as ideal systems for the topical application of clotrimazole. An extensive physico-chemical characterization performed using transmission electron microscopy (TEM), cryogenic transmission electron microscopy (cryo-TEM), 31P-NMR, and small-angle X-ray scattering (SAXS) displayed the formation of small, multi-, and unilamellar vesicles very close to each other, and was capable of forming a three-dimensional network, which stabilized the dispersion. Additionally, the dilution of the dispersion with water reduced the interactions between vesicles, leading to the formation of single unilamellar vesicles. The evaluation of the in vitro percutaneous delivery of clotrimazole showed an improved drug deposition in the skin strata provided by the three-dimensionally-structured vesicles with respect to the commercial cream (Canesten®) used as a reference. Hybrid vesicles were highly biocompatible and showed a significant antifungal activity in vitro, greater than the commercial cream Canesten®. The antimycotic efficacy of formulations was confirmed by the reduced proliferation of the yeast cells at the site of infection in vivo. In light of these results, clotrimazole-loaded, three-dimensionally-structured hybrid vesicles appear to be one of the most innovative and promising formulations for the treatment of candidiasis infections.

Potential Applications of Biphosphonates in Dental Surgical Implants

2007 ◽  
Vol 20 (3) ◽  
pp. 455-465 ◽  
Author(s):  
D. Berardi ◽  
T. Carlesi ◽  
F. Rossi ◽  
M. Calderini ◽  
R. Volpi ◽  
...  
Keyword(s):  
Alveolar Bone ◽  
Chemical Properties ◽  
Osteonecrosis Of The Jaw ◽  
In Vivo Experiments ◽  
Surgical Implants ◽  
Physico Chemical ◽  
Potential Applications ◽  
Collateral Effect

Biphosphonates are largely used for their unquestionable properties of inhibiting bone resorption by osteoclast in the treatment of various osteometabolic illnesses such as osteoporosis, multiple myeloma, tumors which metastasize to the bone and malignant hypercalcemia. In this literature review the physico-chemical properties, biologic activities and the mechanisms of action of biphosphonates are described. The use of these drugs is discussed, analyzing the quantity of results which have emerged through in vitro and in vivo experiments on animal models. In this study the efficiency of these drugs is demonstrated in contrasting the osteolitic processes of the alveolar bone, in promoting the neoformation and in bettering the quality of bone implants. However, it is important to draw attention to a worrying correlation which has emerged during the last 3–4 years, between osteonecrosis of the jaw (ONJ) and the systemic administration of aminobiphosphonates. This collateral effect did not emerge following the use of non-aminobiphosphonates. The aim of this revie w is to identify the guidelines for the use of biphosphonates in oral implant surgery.

scholarly journals The Puzzling Potential of Carbon Nanomaterials: General Properties, Application, and Toxicity

Nanomaterials ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1508
Author(s):  
Danica Jović ◽  
Vesna Jaćević ◽  
Kamil Kuča ◽  
Ivana Borišev ◽  
Jasminka Mrdjanovic ◽  
...  
Keyword(s):  
Carbon Nanomaterials ◽  
Wide Spectrum ◽  
Chemical Properties ◽  
Carbon Nanomaterial ◽  
In Vivo Models ◽  
Physico Chemical ◽  
The Impact ◽  
Cell Signaling Pathways

Being a member of the nanofamily, carbon nanomaterials exhibit specific properties that mostly arise from their small size. They have proved to be very promising for application in the technical and biomedical field. A wide spectrum of use implies the inevitable presence of carbon nanomaterials in the environment, thus potentially endangering their whole nature. Although scientists worldwide have conducted research investigating the impact of these materials, it is evident that there are still significant gaps concerning the knowledge of their mechanisms, as well as the prolonged and chronic exposure and effects. This manuscript summarizes the most prominent representatives of carbon nanomaterial groups, giving a brief review of their general physico-chemical properties, the most common use, and toxicity profiles. Toxicity was presented through genotoxicity and the activation of the cell signaling pathways, both including in vitro and in vivo models, mechanisms, and the consequential outcomes. Moreover, the acute toxicity of fullerenol, as one of the most commonly investigated members, was briefly presented in the final part of this review. Thinking small can greatly help us improve our lives, but also obliges us to deeply and comprehensively investigate all the possible consequences that could arise from our pure-hearted scientific ambitions and work.

Physico-chemical properties of oral streptococcal cell surfaces and their relation with adhesion to solid substrata in vitro and in vivo

1989 ◽  
Vol 42 (3-4) ◽  
pp. 345-353 ◽  
Author(s):  
H.J. Busscher ◽  
A.H. Weerkamp ◽  
H.C. van der Mei ◽  
D. van Steenberghe ◽  
M. Quirynen ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Cell Surfaces ◽  
Physico Chemical

scholarly journals Health Concerns of Various Nanoparticles: A Review of Their in Vitro and in Vivo Toxicity

Nanomaterials ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 634 ◽  
Author(s):  
Marziyeh Ajdary ◽  
Mohammad Moosavi ◽  
Marveh Rahmati ◽  
Mojtaba Falahati ◽  
Mohammad Mahboubi ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Protein Corona ◽  
In Vitro Models ◽  
The Body ◽  
Limiting Factor ◽  
Key Factors ◽  
Cytotoxic Effects ◽  
Physico Chemical

Nanoparticles (NPs) are currently used in diagnosis and treatment of many human diseases, including autoimmune diseases and cancer. However, cytotoxic effects of NPs on normal cells and living organs is a severe limiting factor that hinders their use in clinic. In addition, diversity of NPs and their physico-chemical properties, including particle size, shape, surface area, dispersity and protein corona effects are considered as key factors that have a crucial impact on their safe or toxicological behaviors. Current studies on toxic effects of NPs are aimed to identify the targets and mechanisms of their side effects, with a focus on elucidating the patterns of NP transport, accumulation, degradation, and elimination, in both in vitro and in vitro models. NPs can enter the body through inhalation, skin and digestive routes. Consequently, there is a need for reliable information about effects of NPs on various organs in order to reveal their efficacy and impact on health. This review covers the existing knowledge base on the subject that hopefully prepares us better to address these challenges.

scholarly journals An in-depth multi-omics analysis in RLE-6TN rat alveolar epithelial cells allows for nanomaterial categorization

2019 ◽  
Vol 16 (1) ◽  
Author(s):  
Isabel Karkossa ◽  
Anne Bannuscher ◽  
Bryan Hellack ◽  
Aileen Bahl ◽  
Sophia Buhs ◽  
...  
Keyword(s):  
Epithelial Cells ◽  
Stress Responses ◽  
Chemical Properties ◽  
Cellular Responses ◽  
Alveolar Epithelial Cells ◽  
Alveolar Epithelial ◽  
Physico Chemical ◽  
Key Drivers

Abstract Background Nanomaterials (NMs) can be fine-tuned in their properties resulting in a high number of variants, each requiring a thorough safety assessment. Grouping and categorization approaches that would reduce the amount of testing are in principle existing for NMs but are still mostly conceptual. One drawback is the limited mechanistic understanding of NM toxicity. Thus, we conducted a multi-omics in vitro study in RLE-6TN rat alveolar epithelial cells involving 12 NMs covering different materials and including a systematic variation of particle size, surface charge and hydrophobicity for SiO2 NMs. Cellular responses were analyzed by global proteomics, targeted metabolomics and SH2 profiling. Results were integrated using Weighted Gene Correlation Network Analysis (WGCNA). Results Cluster analyses involving all data sets separated Graphene Oxide, TiO2_NM105, SiO2_40 and Phthalocyanine Blue from the other NMs as their cellular responses showed a high degree of similarities, although apical in vivo results may differ. SiO2_7 behaved differently but still induced significant changes. In contrast, the remaining NMs were more similar to untreated controls. WGCNA revealed correlations of specific physico-chemical properties such as agglomerate size and redox potential to cellular responses. A key driver analysis could identify biomolecules being highly correlated to the observed effects, which might be representative biomarker candidates. Key drivers in our study were mainly related to oxidative stress responses and apoptosis. Conclusions Our multi-omics approach involving proteomics, metabolomics and SH2 profiling proved useful to obtain insights into NMs Mode of Actions. Integrating results allowed for a more robust NM categorization. Moreover, key physico-chemical properties strongly correlating with NM toxicity were identified. Finally, we suggest several key drivers of toxicity that bear the potential to improve future testing and assessment approaches.

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