Related Experiment Videos
Gene expression alterations in activated human T-cells induced by modeled microgravity.
Nancy E Ward1, Neal R Pellis, Semyon A Risin
1Wyle Life Sciences, Houston, Texas, USA.
Journal of Cellular Biochemistry
|June 24, 2006
Summary
Simulated microgravity alters gene expression in activated T lymphocytes. Researchers identified 89 reproducible gene expression changes, with 79 genes downregulated, offering insights into cellular responses to microgravity environments.
Area of Science:
- Immunology
- Space Biology
- Molecular Biology
Background:
- Studies show microgravity affects lymphocyte functions.
- Ground-based microgravity analog systems (MAS) are used to simulate space conditions.
- Gene expression changes may underlie observed functional alterations.
Purpose of the Study:
- To investigate if functional changes in lymphocytes exposed to microgravity are linked to gene expression alterations.
- To identify specific genes and pathways affected by simulated microgravity.
Main Methods:
- Activated T lymphocytes were cultured in a Rotating Wall Vessel (RWV) bioreactor, a microgravity analog system.
- Cells were exposed to static or simulated microgravity for 24 hours.
- Gene expression profiling was performed using Affymetrix GeneChip Human U133A arrays.
Main Results:
- Approximately 4-8% of screened genes showed a >1.5-fold change in expression due to microgravity.
- Reproducible changes were observed in 89 genes, with 10 upregulated and 79 downregulated.
- Affected genes were categorized by associated pathways, with graphical analysis of fold changes.
Conclusions:
- Simulated microgravity induces reproducible changes in T lymphocyte gene expression.
- The identified gene expression alterations provide a molecular basis for functional changes observed in microgravity.
- Further research can explore the functional consequences of these gene expression changes in spaceflight.