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Radiation: Applications01:17

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The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
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All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they...
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Radiomitigators: Breakthroughs in Post-Radiation Recovery.

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This summary is machine-generated.

Radiomitigators, administered after exposure, are crucial for treating radiation injuries like acute radiation syndrome (ARS). This review explores their mechanisms and clinical potential for improving patient outcomes after radiation exposure.

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inflammationionizing radiationoxidative stressradiation fibrosisradiomitigator and radioprotectortissue regeneration

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Area of Science:

  • Biomedical science
  • Radiation oncology
  • Pharmacology

Background:

  • Ionizing radiation (IR) exposure presents significant health risks, necessitating effective medical countermeasures.
  • Current countermeasures include radioprotectors, radiomitigators, and therapeutics, with radiomitigators offering post-exposure treatment advantages.

Purpose of the Study:

  • To review the pathophysiological mechanisms of IR-induced injury.
  • To summarize FDA-approved countermeasures and focus on promising radiomitigators.
  • To discuss the translational potential of radiomitigators for emergency preparedness and oncology.

Main Methods:

  • Literature review of pathophysiological mechanisms of IR injury.
  • Analysis of preclinical and clinical data on radiomitigator efficacy.
  • Examination of radiomitigator routes of administration and mechanisms of action.

Main Results:

  • Radiomitigators show efficacy in preclinical models by modulating oxidative stress, enhancing DNA repair, preserving mitochondria, and regulating inflammation.
  • Key mechanisms include preserving vascular integrity and promoting tissue repair.
  • Clinical evidence supports the translational potential of these agents.

Conclusions:

  • Radiomitigators are vital for managing radiation-induced injuries, offering a critical post-exposure therapeutic window.
  • Optimizing radiomitigators requires addressing challenges in clinical translation and exploring combination therapies.
  • Further research is needed to enhance survival and quality of life for individuals exposed to IR.