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Bioscience

Cell measurements

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Displaying 26 - 50 of 140

Micromechanical Compatibility Between Cells and Scaffolds Directs Phenotypic Transition of Stem Cells

January 28, 2022
Author(s)
Yang Song, Jiaoyue Long, Jeremiah Woodcock, Joy Dunkers, Hung Chun Lin, Douglas M. Fox, Xiaoling Liao, Yonggang Lv, Li Yang, Martin Chiang
This study experimentally substantiates the micromechanical compatibility between cell and substrate is essential for cells to achieve energetically favorable mechanotransduction that directs phenotypic transitions. The argument for this compatibility is

Gut Microbe-Targeted Choline Trimethylamine Lyase Inhibition Improves Obesity Via Rewiring of Host Circadian Rhythms

January 24, 2022
Author(s)
Rebecca Schugar, Christy Gliniak, Lucas Osborn, William Massey, Naseer Sangwan, Anthony Horak, Rakhee Banerjee, Danny Orabi, Robert Helsley, Amanda Brown, Amy Burrows, Chelsea Finney, Kevin Fung, Frederick Allen, Daniel Ferguson, Anthony Gromovsky, Chase Neumann, Kendall Cook, Amy McMillan, Jennifer Buffa, James Anderson, Margarete Mehrabian, Maryam Goudarzi, Belinda Willard, Tytus Mak, Andrew Armstrong, Garth Swanson, Ali Keshavarzian, Jose Carlos Garcia-Garcia, Zeneng Wang, Aldons Lusis, Stanley Hazen, Mark Brown
Obesity has repeatedly been linked to reorganization of the gut microbiome, yet to this point obesity therapeutics have been targeted exclusively toward the human host. Here we show that gut microbe-targeted inhibition of the trimethylamine N-oxide (TMAO)

Quantitative Determination of Cell Viability Using Absorbance Microscopy

January 19, 2022
Author(s)
Greta Babakhanova, Stephen Zimmerman, Laura Pierce, Sumona Sarkar, Nicholas Schaub, Carl Simon Jr.
Cell viability is an essential measurement for cell therapy products. One of the most common tests is Trypan blue (TB) dye exclusion where blue-stained cells are counted via imaging. Typically, live and dead cells are counted based on pixel intensities of

AbsorbanceQ: An App for Generating Absorbance Images from Brightfield Images

January 4, 2022
Author(s)
Stephen Zimmerman, Carl Simon Jr., Greta Babakhanova
The AbsorbanceQ app converts brightfield microscope images into absorbance images that can be analyzed and compared across different operators, microscopes and time. Absorbance-based measurements are comparable, which is useful when the aim is to

Characteristics to Consider when Selecting a Positive Control Material for an In Vitro Assay

September 29, 2021
Author(s)
Elijah Petersen, Andrew Nguyen, Jeffrey Brown, John T. Elliott, Amy Clippinger, John Gordon, Nicole Kleinstreuer, Matthias Roesslein
The use of in vitro assays to inform decision-making requires robust and reproducible results across studies, laboratories, and time. Experiments using positive control materials are an integral component of an assay procedure to demonstrate the extent to

Resources for developing reliable and reproducible in vitro test methods

September 29, 2021
Author(s)
Elijah Petersen, Vytas Reipa, Menghang Xia, Monita Sharma
A broad range of in vitro test methods have been developed given their numerous potential advantages over in vivo tests. We describe here key resources and tools to increase the reliability and reproducibility of in vitro test methods.

Use of cause-and-effect analysis to optimize the reliability of in vitro inhalation toxicity measurements using an air-liquid interface

September 29, 2021
Author(s)
Elijah Petersen, Monita Sharma, Amy Clippinger, John Gordon, Aaron Katz, Peter Laux, Lars Leibrock, Andreas Luch, Joanna Matheson, Andreas Stucki, Jutta Tentschert, Frank Bierkandt
In vitro inhalation toxicology methods are increasingly being used for research and regulatory purposes. While the opportunity for increased human relevance of in vitro inhalation methods compared to in vivo tests has been established and discussed, how to