Advanced in vitro exposure systems.

27. Oct. 2022

VITROCELL® sQCM 12: Data Interpretation

The Quartz Crystal Microbalance is a powerful tool for dosimetry in VITROCELL Exposure Systems. However, interpreting live-data from a sQCM can be misleading, as there is a lot going on in parallel during measurements.

VITROCELL Application Note

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22. Mar. 2022

Air-liquid interface culture promotes maturation and allows environmental exposure of pluripotent stem cell–derived alveolar epithelium

https://doi.org/10.1172/jci.insight.155589

Kristine M. Abo,1,2 Julio Sainz de Aja,3,4,5 Jonathan Lindstrom-Vautrin,1 Konstantinos-Dionysios Alysandratos,1,2 Alexsia Richards,6 Carolina Garcia-de-Alba,3,4,5 Jessie Huang,1,2 Olivia T. Hix,1,2 Rhiannon B. Werder,1,2 Esther Bullitt,7 Anne Hinds,2 Isaac Falconer,8 Carlos Villacorta-Martin,1 Rudolf Jaenisch,6,9 Carla F. Kim,3,4,5 Darrell N. Kotton,1,2 and Andrew A. Wilson1,2
1Center for Regenerative Medicine of Boston University and Boston Medical Center, Boston, Massachusetts, USA. 
2The Pulmonary Center and Department of Medicine, Boston University School of Medicine, Boston, Massachusetts, USA.
3Stem Cell Program and Divisions of Hematology/Oncology and Pulmonary & Respiratory Diseases, Boston Children’s Hospital, Boston, Massachusetts, USA. 
4Harvard Stem Cell Institute, Cambridge, Massachusetts, USA. 
5Department of Genetics, Harvard Medical School, Boston, Massachusetts, USA. 
6Whitehead Institute for Biomedical Research, Cambridge, Massachusetts, USA. 
7Department of Physiology & Biophysics, Boston University, Boston, Massachusetts, USA. 
8Boston University School of Medicine, Boston, Massachusetts, USA. 
9Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.

This study comprehensively characterize the effects of ALI culture on iAT2s and benchmark their transcriptional profile relative to both freshly sorted and cultured primary human fetal and adult AT2s. They find that iAT2s cultured at ALI maintain an AT2 phenotype while upregulating expression of transcripts associated with AT2 maturation. Then they leverage this platform to assay the effects of exposure to clinically significant, inhaled toxicants including cigarette smoke and electronic cigarette vapor.

 

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12. Nov. 2021

Product News 11/2021

VITROCELL® S-QCM

Improved Sensor for High Precision Real-Time Dose Monitoring

The VITROCELL® sQCM 12 is the next step in the evolution of dosimetry methods in cell culture exposure systems. It simplifies the usage of conventional Quartz Crystal Microbalances suitable for VITROCELL® 12 modules while maintaining the working principle, precision and accuracy of the balances you’re used to.

VITROCELL® S-QCM  (PDF)

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12. Aug. 2021

Product News 08/2021

VITROCELL® Remote Assist Support

Let us lend you a helping hand via HoloLens

VITROCELL in vitro exposure systems are specifically manufactured according to customer specifications. Our customers in the field of research & development typically have very complex requirements for the system. This is why a VITROCELL technician is required to carry out product training as well as service & support.
We strive to provide rapid responses and problem-solving for VITROCELL users all over the world.

VITROCELL® Remote Assist Support  (PDF)

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19. Apr. 2021

Product News 04/2021

The new VITROCELL® Millicell Holder

How to use Millicell 24-well Standing Inserts in the VITROCELL® 12 Module Series

The revolutionary new holder system enables for the use of standing inserts in all modules of the VITROCELL® 12 Series for 12-well sized inserts. As an additional advantage, the media com­partment is sealed towards the aerosol exposure head to avoid contact of the test substance with the cell culture media.

VITROCELL® Millicell Holder – How to use Millicell 24-well Standing inserts in the VITROCELL® 12 Module Series

 

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3. Mar. 2021

Vitrocell® Leak Tester

Must-have device for aerosol research – easy and efficient leak detection

Regular leak tests are mandatory in aerosol research. A leak caused by a forgotten connection or defective o-ring may have a significant influence on the aerosol exposure process. We recommend to carry out a leak test prior to the experiment and as part of cleaning or service routine.

VITROCELL Application Note

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30. Nov. 2020

Product News 12/2020

VITROCELL® 12/12 now available with Climatic Chamber

For reliable aerosol exposure of cell cultures using 12- or 24-well sized inserts

The VITROCELL® 12/12 module system has been designed to facilitate the exposure of mammalian cell cultures to airborne substances such as gases, complex mixtures, nanoparticles and fibers. It features a throughput of 3 dilution steps @ 3 replicates and 1 clean air control at 3 replicates. In order to optimize the exposure for liquid aerosols and to maximize the performance of humidified air supply it is now also available in a user-friendly climatic chamber.

VITROCELL® 12/12 now available with Climatic Chamber

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28. Nov. 2020

Parametric Optimization of an Air–Liquid Interface System for Flow-Through Inhalation Exposure to Nanoparticles: Assessing Dosimetry and Intracellular Uptake of CeO2 Nanoparticles

doi:10.3390/nano10122369

Lars B. Leibrock 1, Harald Jungnickel 1, Jutta Tentschert 1, Aaron Katz 1, Blaza Toman 2 , Elijah J. Petersen 3 , Frank S. Bierkandt 1, Ajay Vikram Singh 1 , Peter Laux 1 and Andreas Luch 1
1 German Federal Institute for Risk Assessment (BfR), Department of Chemical and Product Safety, Max-Dohrn-Strasse 8-10, 10589 Berlin, Germany; 
2 Information Technology Laboratory, National Institute of Standards and Technology, 100 Bureau Drive, Gaitherburg, MD 20899-8311, USA; 
3 Materials Measurement Laboratory, National Institute of Standards and Technology, 100 Bureau Drive, Gaitherburg, MD 20899-8311, USA; 

 

ALI systems are considered to be a promising exposure system to study toxicological e ects of airborne nanomaterials instead of in vivo inhalation studies and have been widely used to assess the toxicology of nanomaterials in recent years. However, the robustness of these methods is not yet wellunderstood. Here we reported a C&E analysis of a commonly used flow through ALI exposure system.

 

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29. Sep. 2020

Invited review: human air-liquid-interface organotypic airway tissue models derived from primary tracheobronchial epithelial cells—overview and perspectives

https://doi.org/10.1007/s11626-020-00517-7


Xuefei Cao1, Jayme P. Coyle2, Rui Xiong1, Yiying Wang1, Robert H. Heflich1, Baiping Ren1, William M. Gwinn3, Patrick Hayden4, Liying Rojanasakul2

1 Division of Genetic and Molecular Toxicology, National Center for Toxicological Research, US Food and Drug Administration, 3900 NCTR Rd., AR Jefferson, USA
2 Allergy and Clinical Immunology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers forDisease Control and Prevention,Morgantown,WV, USA
3 Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Durham, NC, USA
4 BioSurfaces Inc., Ashland, MA, USA


One important element for validating any new assay for making regulatory decisions is determining its performance relative to an accepted standard. Conducting in vivo inhalation toxicity studies using whole-body or nose-only exposure systems is expensive and time-consuming and typically requires a large number of animals. The goal of using alternative methods, like human in vitro ALI airway cultures, ultimately is to replace inhalation toxicity testing in animals with in vitro approaches. Transition from animal- to human-based models is ultimately expected to lead to faster and better predictive toxicity assessments and therapeutic development at lower cost.  This study shows the development and validation of alternative in vitro methods for acute toxicity testing, including acute inhalation toxicity testing.
 

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15. Aug. 2020

Development of an in vitro approach to point-of-contact inhalation toxicity testing of volatile compounds, using organotypic culture and air-liquid interface exposure

https://doi.org/10.1016/j.tiv.2020.104968

Artik Mistry, Larry E. Bowen, Michael W. Dzierlenga, Jessica K. Hartman, Scott D. Slattery
ScitoVation, LLC, Durham, NC 27713, United States
 

In this project, an incremental approach to assay development, taking small steps that built understanding of the biology and confidence in the methods were taken to attempted. Focused on general cell health assays (viability,cytotoxicity, TEER), as well as a mechanism-of-action-specific assay (GSH depletion), we found all assays to be sufficiently sensitive over the full range of possible values for both cell culture models (BEAS-2B cell and EpiAirway cultures)
 

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