Changes in Transcriptional Output of Human Peripheral Blood Mononuclear Cells Following Resistance Exercise
ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA THERMAL AND MOUNTAIN MEDICINE DIVISION
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Various types of exercise alter the population of circulating peripheral blood mononuclear cells PBMCs and change their transcriptional output. This work examines changes in PBMC populations and transcription in response to resistance exercise training RET, and identify key transcriptional changes in PBMCs that may play a role in altering peripheral tissues in response to RET. Ten resistance-trained men 20-24 years, performed an acute bout of RET for 30 min following a 12 h fast. Venous blood was sampled at rest, immediately following exercise, and at 2 h post-exercise and analyzed for total and differential leukocytes and global gene expression using Affymetrix Genechips. Results showed elevated leukocytes, monocytes, lymphocytes, and lactate values immediately post-exercise P0.05 over baseline. At 2 h post-exercise, leukocytes, and granulocytes remained elevated P0.05, whereas lymphocytes were lower than P0.05 baseline values. Initial microarray results showed the greatest transcriptional changes in pathways related to immune response, inflammation, and cellular communication. The change in PBMC population 2 h time point correlated with a dramatic decrease in the expression of CD160, and XCL1, markers of lymphocyte populations. At the 2 h recovery time point upregulation of matrix metalloproteinase 9, orosomucoid 1, dishevelled-associated activator of morphogenesis 2, and arginase 1 suggest an induction in muscle damage and repair during this time frame. These results demonstrate that an acute bout of RET disrupts cellular homeostasis, induces a transient redistribution of certain leukocytes, and results in transcriptional changes in PBMCs translating into systemic changes in response to RET.
- Genetic Engineering and Molecular Biology
- Anatomy and Physiology