The innate immune system as mediator of systemic DNA damage responses

Area of Science:

• Genetics
• Cell Biology
• Aging Research

Background:

• DNA damage is a key driver of cancer and age-related tissue degeneration.
• Cellular DNA damage responses (DDR) include cell cycle arrest, senescence, and apoptosis.
• Organism-level responses to tissue-specific DNA damage and genome instability are less understood.

Purpose of the Study:

• To investigate non-cell autonomous responses to genome instability.
• To explore the interaction between distinct tissues in response to DNA damage.
• To elucidate the mechanisms of the germline DNA damage-induced systemic stress response (GDISR).

Main Methods:

• Utilizing *C. elegans* as a model organism with distinct germline and somatic tissue responses.
• Investigating the role of ERK MAP kinase MPK-1 in mediating GDISR.
• Analyzing the involvement of putative secreted peptides and innate immunity.

Main Results:

• Germline DNA damage triggers a systemic stress response (GDISR) in *C. elegans*.
• GDISR involves MPK-1-induced secreted peptides linked to innate immunity.
• Innate immunity activates the ubiquitin-proteasome system (UPS) in somatic tissues, conferring systemic stress resistance.

Conclusions:

• Germline DNA damage can induce systemic responses impacting distant somatic tissues.
• Innate immunity plays a crucial role in mediating systemic DNA damage responses.
• Ubiquitin-proteasome system activity enhances somatic tissue endurance against stress.