Key mechanisms involved in ionizing radiation-induced systemic effects. A current review

Area of Science:

• Radiation Biology
• Immunology
• Cellular Stress Response

Background:

• Organisms initiate potent inflammatory responses to physical, chemical, and biological threats to maintain tissue integrity and homeostasis.
• Systemic effects involve phenomena originating locally but spreading throughout the body, impacting multiple organs and tissues.
• Ionizing radiation (IR) exposure triggers cellular responses including DNA damage response, apoptosis, and inflammation.

Purpose of the Study:

• To review the current knowledge on IR-induced systemic effects.
• To identify key molecules and mechanisms involved in the systemic spread of radiation response signals.
• To discuss the clinical implications of danger-signal mediated systemic immune effects of radiotherapy.

Main Methods:

• Literature review of existing research on ionizing radiation response.
• Analysis of molecular and cellular mechanisms underlying systemic effects.
• Discussion of immune system involvement and clinical relevance in radiotherapy.

Main Results:

• IR-induced systemic effects involve complex interactions between cellular stress responses and immune signaling.
• A 'holistic' approach is necessary to understand the multifaceted nature of these responses.
• Danger signals mediate systemic immune effects relevant to radiotherapy.

Conclusions:

• Understanding IR-induced systemic effects necessitates integrating knowledge across multiple biological levels.
• Key molecules and mechanisms drive the propagation of stress signals throughout the organism.
• Radiotherapy's systemic immune effects, mediated by danger signals, have significant clinical implications.