New considerations on hormetic response against oxidative stress

Area of Science:

• Cellular Biology
• Environmental Health
• Gerontology

Background:

• Organisms possess survival mechanisms against environmental challenges.
• Hormesis describes beneficial adaptive responses to low-dose damaging agents.
• Therapeutic applications of hormesis require further investigation.

Purpose of the Study:

• To explore considerations for using hormesis as a therapeutic tool.
• To discuss the potential of hormesis in improving health and lifespan.
• To stimulate debate on hormesis and its biological underpinnings.

Main Methods:

• Review of existing literature on hormesis.
• Analysis of stressor-induced parallel or dual response pathways.
• Examination of Nrf2 activation mechanisms and their hormetic effects.
• Discussion of mild oxidative stress, chronic inflammation, and the obesity paradox.

Main Results:

• Identified that identical stressors can trigger diverse outcomes via parallel or dual pathways.
• Highlighted varied Nrf2 activation mechanisms leading to different hormetic effects.
• Proposed mild oxidative stress and low-grade chronic inflammation as promising research avenues.
• Linked hormesis to the longevity of centenarians and homeostasis maintenance.

Conclusions:

• Hormesis presents a significant therapeutic opportunity for enhancing health and lifespan.
• Further research into hormetic pathways, including Nrf2 and oxidative stress, is warranted.
• Understanding hormesis may elucidate mechanisms behind extreme human longevity and effective homeostasis.