Mitochondria-Targeting and ROS-Cleavable Hemicyanine-Tranexamic Acid Conjugates as Radioprotective Agents Mitigated...

Area of Science:

• Biomedical Engineering
• Radiochemistry
• Dermatology

Background:

• Radiation-induced skin injury (RISI) is a common, challenging side effect of radiotherapy.
• Current treatments for RISI often have limited efficacy, especially for high-dose acute injuries, due to single-pathway interventions.
• Mitochondria are key in managing reactive oxygen species (ROS) and inflammation, making them a critical target for RISI treatment.

Purpose of the Study:

• To design and synthesize novel mitochondria-targeting hemicyanine (HCY) small molecules conjugated with tranexamic acid (TA).
• To evaluate the synergistic therapeutic potential of these HCY-TA conjugates in treating acute RISI.
• To establish an innovative mitochondria-targeting delivery system for mitigating radiation-induced damage.

Main Methods:

• Synthesis of a series of mitochondria-targeting hemicyanine (HCY) molecules conjugated with tranexamic acid (TA) via ROS-cleavable enamine bonds.
• Evaluation of the radioprotective effects of HCY-TA conjugates in models of acute radiation-induced skin injury.
• Assessment of synergistic mechanisms including antioxidation, anti-inflammation, and plasminogen inhibition.

Main Results:

• Successful design and synthesis of HCY-TA conjugates with targeted delivery to mitochondria.
• Demonstrated synergistic therapeutic effects in treating acute RISI, including enhanced wound healing.
• Confirmed antioxidation, anti-inflammation, and plasminogen inhibition as key mechanisms of action.

Conclusions:

• HCY-TA conjugates show significant promise as a novel therapeutic strategy for radiation-induced skin injury.
• Mitochondria-targeted delivery of TA via HCY conjugates enhances RISI treatment efficacy and minimizes side effects.
• This approach offers a potential platform for developing treatments for other radiation-induced diseases.