Running to Outcompete Metastasis

Area of Science:

• Oncology
• Metabolic Research
• Exercise Physiology

Background:

• Emerging research suggests physical activity inhibits cancer onset.
• The precise mechanisms by which exercise impacts cancer progression, particularly metastasis, require further elucidation.

Purpose of the Study:

• To investigate the impact of physical exercise on melanoma primary tumor growth and metastasis.
• To explore the underlying systemic metabolic changes induced by exercise that affect cancer progression.

Main Methods:

• Utilized human epidemiologic data and in vivo models of melanoma metastasis.
• Analyzed systemic metabolic reprogramming in organs, including carbohydrate metabolism, glycolysis, oxidative phosphorylation, and mitochondrial biogenesis.
• Investigated the role of the mTOR signaling pathway and its inhibition by rapamycin.

Main Results:

• Physical exercise significantly decreased melanoma metastatic spread.
• Exercise induced systemic metabolic changes that hindered melanoma growth by enhancing nutrient competition from healthy organs.
• The exercise-induced "metabolic shield" was reversible with mTOR inhibition (rapamycin).

Conclusions:

• Exercise establishes a systemic metabolic environment unfavorable for melanoma progression and metastasis.
• Metabolic plasticity and systemic reprogramming are critical in metastasis.
• Exercise-induced metabolic changes are linked to mTOR signaling, presenting potential therapeutic targets for cancer treatment.