Significant Suppression of CT Radiation-Induced DNA Damage in Normal Human Cells by the PrC-210 Radioprotector

Area of Science:

• Radiation biology
• Medical imaging
• Radioprotective agents

Background:

• Computed tomography (CT) scans, while clinically valuable, are associated with DNA double-strand breaks (γ-H2AX foci) in white blood cells.
• Previous research indicates a need for effective radioprotectors to mitigate radiation-induced DNA damage.

Purpose of the Study:

• To evaluate the efficacy of the radioprotector PrC-210 in suppressing CT radiation-induced DNA damage.
• To compare PrC-210's protective effects against 12 other antioxidants.

Main Methods:

• Human blood samples were irradiated using a CT scanner (50-150 mGy) with or without PrC-210.
• γ-H2AX foci were quantified to assess DNA double-strand breaks.
• X-ray-induced naked DNA damage and hydroxyl radical (•OH) insult were studied to compare antioxidant efficacy.

Main Results:

• PrC-210 significantly reduced CT radiation-induced γ-H2AX foci in white blood cells to near background levels (P < 0.0001).
• PrC-210 demonstrated superior efficacy among 13 tested antioxidants in protecting against X-ray-induced naked DNA damage.
• PrC-210 administration did not compromise micro-CT image quality.

Conclusions:

• PrC-210 effectively suppresses DNA damage induced by CT radiation and hydroxyl radicals.
• PrC-210 shows significant potential as a radioprotective agent for human use across diverse radiation exposure scenarios.