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Updated: Feb 7, 2026
11:24
Measuring DNA Damage and Repair in Mouse Splenocytes After Chronic In Vivo Exposure to Very Low Doses of Beta- and Gamma-Radiation
Published on: July 3, 2015
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Proteomic Changes in Mouse Spleen after Radiation-Induced Injury and its Modulation by Gamma-Tocotrienol
Amrita K Cheema1, Stephanie D Byrum2, Neel Kamal Sharma3
1a Departments of Oncology, Biochemistry, Molecular and Cellular Biology, Georgetown University Medical Center, Washington, DC.
Radiation Research
|August 3, 2018
Summary
Gamma-tocotrienol (GT3) protects against radiation injury by modulating spleen protein expression and Wnt signaling pathways. This vitamin E isomer alleviates hematopoietic damage, offering a potential radioprotective strategy.
Area of Science:
- Biochemistry
- Molecular Biology
- Radioprotection
Background:
- Gamma-tocotrienol (GT3), a vitamin E isomer, shows potential as a radioprotector against radiation-induced injuries.
- Understanding the molecular mechanisms of GT3's radioprotective effects is crucial for its therapeutic application.
Purpose of the Study:
- To investigate the molecular mechanisms underlying the radioprotective efficacy of GT3 in spleen tissue.
- To analyze proteomic changes in the spleen following GT3 treatment in irradiated mice.
Main Methods:
- Male CD2F1 mice were pretreated with GT3 or vehicle 24 hours before 7 Gy total-body irradiation.
- Spleen tissues were collected at various time points postirradiation for proteomic analysis using high-resolution mass spectrometry.
- Bioinformatic analyses were performed to identify differentially expressed proteins and associated biological pathways.
Main Results:
- Radiation exposure significantly altered spleen proteomic profiles, including upregulation of Wnt signaling and actin-cytoskeleton proteins.
- GT3 pretreatment attenuated radiation-induced hematopoietic injury in the spleen.
- GT3 modulated various cell signaling proteins, indicating its role in mitigating radiation damage.
Conclusions:
- GT3 exhibits radioprotective effects by alleviating radiation-induced alterations in spleen biochemical pathways.
- The modulation of Wnt signaling and actin-cytoskeleton proteins is implicated in GT3's protective mechanism against hematopoietic injury.
- GT3 represents a promising therapeutic agent for mitigating radiation-induced damage.
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