Advanced in vitro exposure systems.

28. Feb. 2020

Lung Cell Exposure to Secondary Photochemical Aerosols Generated From OH Oxidation of Cyclic Siloxanes

DOI: 10.1016/j.chemosphere.2019.125126 

Autors

Benjamin M King 1 , Nathan J Janechek 1 , Nathan Bryngelson 1 , Andrea Adamcakova-Dodd 2 , Traci Lersch 3 , Kristin Bunker 3 , Gary Casuccio 3 , Peter S Thorne 2 , Charles O Stanier 4 , Jennifer Fiegel 5 

1Department of Chemical and Biochemical Engineering, The University of Iowa, 4133 Seamans Center for the Engineering Arts and Sciences, Iowa City, IA, 52242, USA.
2Department of Occupational and Environmental Health, The University of Iowa, 145 N. Riverside Dr., Iowa City, IA, 52242, USA.
3RJ Lee Group, 350 Hochberg Road, Monroeville, PA, 15146, USA.
4Department of Chemical and Biochemical Engineering, The University of Iowa, 4133 Seamans Center for the Engineering Arts and Sciences, Iowa City, IA, 52242, USA. Electronic address: charles-stanier@uiowa.edu.
5Department of Chemical and Biochemical Engineering, The University of Iowa, 4133 Seamans Center for the Engineering Arts and Sciences, Iowa City, IA, 52242, USA. Electronic address: jennifer-fiegel@uiowa.edu.

 

A549 Lung cells were exposed to the secondary organosilicon aerosols using the Vitrocell 6 air-liquid interface system.

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25. Feb. 2020

Comparison of in vitro toxicity of aerosolized engineered nanomaterials using air-liquid interface mono-culture and co-culture models

https://doi.org/10.1016/j.impact.2020.100215

Autors

Yifang Wanga, Andrea,Adamcakova-Doddb, Benjamin R.Steinesb, Xuefang Jingb, Aliasger K.Salemc, Peter S.Thorneab
a Human Toxicology Interdisciplinary Program, University of Iowa, Iowa City, IA, USA
b Occupational and Environmental Health, University of Iowa, Iowa City, IA, USA
c College of Pharmacy, University of Iowa, Iowa City, IA, USA

 

Highlights
• An in vitro co-culture model utilizing endothelial and epithelial cells and differentiated macrophages was established.
• Air-liquid interface exposures to Ag-SiO2 and CuO nanoparticles produced cell death, oxidative stress and cytokine release.
• Mono- and co-culture models showed comparable excposure outcomes except that cytokines were higher in the co-culture system.
• Compared to epithelia cells or macrophages alone, responses to CuO in the co-culture model indicated cellular interaction

 

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24. Feb. 2020

In vitro advances in whole aerosol approaches for e-cigarette testing

IIVS Workshop 3, Feb 24-26th 2020

Autor

David Thorne, British American Tobacco

 

Workshop series to identify, discuss and develop recommendations for the optimal generation and use of in vitro data for product regulation.

 

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19. Feb. 2020

Differences in cytotoxicity of lung epithelial cells exposed to titanium dioxide nanofibers and nanoparticles: Comparison of air-liquid interface and submerged cellcultures

doi: 10.1016/j.tiv.2020.104798

Autors

Medina-Reyes EI1, Delgado-Buenrostro NL2, Leseman DL3, Déciga-Alcaraz A2, He R4, Gremmer ER3, Fokkens PHB3, Flores-Flores JO5, Cassee FR4, Chirino YI2.
1 Laboratorio de Carcinogénesis y Toxicología, Unidad de Biomedicina, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Estado de México, Mexico. Electronic address: medinaingrid0@gmail.com.
2 Laboratorio de Carcinogénesis y Toxicología, Unidad de Biomedicina, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Estado de México, Mexico.
3 National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands.
4 National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands; Institute of Risk Assessment Sciences, Utrecht University, Utrecht, the Netherlands.
5 Instituto de Ciencias Aplicadas y Tecnología, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, Coyoacán, CP 04510 Ciudad de México, Mexico

 

The Air-liquid interface (ALI) model has emerged as a closer physiological system that mimics exposure in gaseous and liquid phases. This Study shows that the exposure to TiO2 nanofibers and nanoparticles displays similar toxicity both the ALI and submerged cell cultures, using lung epithelial A549 cells. Additionally, they detected for the first time that TiO2 nanofibers were located into the nucleus.

 

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15. Jan. 2020

Use of in vitro 3D tissue models in genotoxicity testing: Strategic fit, validation status and way forward.

Report of the working group from the 7th International Workshop on Genotoxicity Testing (IWGT)

https://doi.org/10.1016/j.mrgentox.2020.503135

Authors
StefanPfuhlera, Janvan Benthemb, RodgerCurrenc, Shareen H.Doakd, MariaDusinskae, MakotoHayashif, Robert H.Heflichg, DarrenKiddh, DavidKirklandi, YangLuanj, GladysOuedraogok, KerstinReisingerl, ToshioSofunim, Frédériquevan Ackern, YingYango, RaffaellaCorvip
a Procter and Gamble, Mason Business Centre, Mason, OH, USA
b National Institute for Public Health and the Environment, Centre for Health Protection, Bilthoven, the Netherlands
c Institute for In Vitro Sciences, Inc., Gaithersburg, MD, USA
d Swansea University Medical School, Singleton Park, Swansea, SA2 8PP, Wales, UK
e Health Effects Laboratory, Department of Environmental Chemistry, NILU-Norwegian Institute for Air Research, Kjeller, Norway
f makoto international consulting, Ebina, Japan
g U.S. Food and Drug Administration/National Center for Toxicological Research, Jefferson, AR, USA
h Covance Laboratories Ltd, Otley Road, Harrogate, HG3 1PY, UK
i Kirkland Consulting, PO Box 79, Tadcaster, LS24 0AS, UK
j School of Public Health, Hongqiao International Institute of Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, PR China
k L’Oréal R&I, Aulnay-sous-bois, France
l Henkel AG & Co KGaA, Duesseldorf, Germany
m Formerly National Institute of Health Sciences, Tokyo, Japan
n Triskelion B.V., Zeist, the Netherlands
o Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, PR China
p European Commission, Joint Research Centre (JRC), Ispra, Italy

 

Highlights
• Extensive progress made in development of 3D organ-based genotoxicity assays.
• 3D culture models represent major exposure routes: dermal, oral, inhalation.
• The 3D skin comet and MN assays are considered mature and sufficiently validated.
• Liver and airway model-based genotoxicity assays show promise but are at early stage.<

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31. Dec. 2019

High Throughput Air Liquid Interface Exposure Modules: Characterization of Smoke/Aerosol Dosimetry and in vitro Mutagenicity and Cytotoxicity of Two Tobacco Product Types

Robert Leverette1, Brian Keyser1, Michael Hollings2 and Adam Seymour2
1RAI Services Company, Winston−Salem, NC 27101 USA
2Covance Laboratories Ltd., Harrogate, North Yorkshire HG3 1PY, UK

 

• Freshly generated whole smoke / aerosol from three different tobacco product types (3R4F, THP and ENDS) was consistently delivered within the AMES 48 and 6/48 exposure modules.
• Biological endpoints: 3R4F whole smoke induced increased revertant counts (Ames) and cytotoxicity (NRU) in the AMES 48 and 6/48 modules, respectively.
• Revertant counts (Ames) and cytotoxicity (IC50) values were comparable to those from the standard exposure modules when run under similar exposure conditions.
• Overall, the AMES 48 and 6/48 modules are deemed “Fit for Use" for the in vitrO evaluation of different tobacco product types (combustible, THP, ENDS).
 

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30. Nov. 2019

Characterization of Whole Mainstream Smoke/Aerosol Delivery within the Vitrocell® Ames 48 High Throughput Exposure Module Using Different Tobacco Product Types.

1Leverette R, 1Keyser B, 2Seymour A and 2Hollings M
1Scientific & Regulatory Affairs, RAI Services Company, Winston-Salem, NC 27101
2Covance Laboratories Ltd, Otley Road, Harrogate, North Yorkshire HG3 1PY, UK

 

  • Freshly generated whole smoke from the 3R4F reference cigarette (HCI; TPM) and aerosol from either a commercially available THP (HCI; glycerol) or ENDS (CRM81; glycerol) were delivered consistently within the Vitrocell® AMES 48 High Throughput exposure module.
  • Coefficients of variation (CV) for whole smoke/aerosol deposition within each dose (row) were < 20% (3R4F; TPM) and < 15% (THP and ENDS; glycerol).
  • Overall, the data presented demonstrate the consistent delivery of whole smoke/aerosol under controlled conditions and a reproducible in vitro biological response (Ames) with the Vitrocell® AMES 48 High Throughput exposure module. HCI 3R4F whole smoke exposures do require additional range finding experiments for optimization.
  • Ames activity of 3R4F whole smoke, when generated under similar conditions, was comparable when using either the Vitrocell® AMES 48 High Throughput exposure module or the Vitrocell® Standard exposure modules (Figure 6).
  • The Vitrocell® AMES 48 exposure module is a useful tool to increase sample throughput for the in vitro toxicological assessment of freshly generated whole smoke and aerosols from different tobacco product types (combustible, THP and ENDS). The AMES 48 module allows 7 smoke/aerosol doses (with 6 cultures per dose) per exposure versus only 2 (HCI) - 4 (ISO) doses (with 3 cultures per dose) for the standard exposure modules (when using a VC10® smoking machine).

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30. Nov. 2019

Dosimetric Analysis of Aerosol Generated by a Vitrocell® VC10® Smoking Robot – Investigations on Dose Dependency and Consistency of Application


Adam Seymour, Michael Hollings, Joanne Larner and Julie Clements;

Covance Laboratories Ltd, Harrogate, UK


QCMs were used to assess the deposition of cigarette aerosol from a Vitrocell® VC10® in Vitrocell® Ames, 6/4, 12/4 and 24/4 exposure modules. The power to resolve difference between 8 and 1 SLPM is statistically significant in all module types assessed. Uniformity within each module was confirmed (P >0.98) in all module types, at all airflows. Repeatability was assessed and found to be consistent (no significant difference) in all module types at airflows of 10, 8 and 4 SLPM, however, at 1 SLPM a significant difference was noted in 9 out of 12 experiments – likely an artifact of high deposition.
These results show that exposures utilizing the Vitrocell® VC10® and associated modules are robust; but indicate the necessity of dosimetry measures to aid in the quantification of delivered dose.
 

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27. Nov. 2019

State-of-the-art methods and devices for the generation, exposure, and collection of aerosols from heat-notburn tobacco products

Stéphanie Boué1, Didier Goedertier1, Julia Hoeng1 , Arkadiusz Kuczaj1, Shoaib Majeed1, Carole Mathis1, Anne May2 , Blaine Phillips3, Manuel C Peitsch1, Falk Radtke1, Walter K Schlage4, Wei Teck Tan3 and Patrick Vanscheeuwijck1

1 Philip Morris International (PMI) Research & Development, Philip Morris Products S.A., Neuchâtel, Switzerland
2 Consultants in Science, Epalinges, Switzerland
3 Philip Morris International (PMI) Research & Development, Philip Morris International Research Laboratories Pte. Ltd, Science Park II, Singapore
4 Biology Consultant, Bergisch Gladbach, Germany

 

The VC 24/48 exposure system is being validated for the exposure process of three-dimensional, organotypic cell culture inserts with CS and with aerosols generated from HNB tobacco products and e-liquids.
They aerosol deposition of different CS concentrations as determined by three different approaches were assessed and compared : (1) a WST-1 colorimetric assay; (2) the determination of eight carbonyls trapped in PBS; and (3) QCM-determined particle mass deposition.

 

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17. Nov. 2019

Society of Toxicology's 59th Annual Meeting and ToxExpo

March 15–19, 2020. Anaheim, California, USA

The 2020 scientific program has been designed to maximize exposure to groundbreaking research and opportunities for networking and professional development.

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Categories: Exhibitions

Tags: congress

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