Dietary microbes modulate transgenerational cancer risk

Area of Science:

• Environmental health
• Genetics
• Microbiology

Background:

• Rising rates of obesity and cancer in industrialized nations are linked to environmental factors, though mechanisms remain unclear.
• Westernized diets are suspected contributors to these health issues, but their long-term, transgenerational impacts are not well understood.

Purpose of the Study:

• To investigate the transgenerational effects of Westernized diets on offspring health using animal models.
• To determine if diet-associated gut microbiota mediate these long-term health consequences.

Main Methods:

• Utilized mouse models to assess the impact of maternal dietary exposure on subsequent generations.
• Investigated the role of gut microbiota by transplanting diet-associated bacterial communities.
• Evaluated the efficacy of beneficial microbial interventions in mitigating transgenerational health risks.

Main Results:

• Grandmother's in utero exposure to Western diets resulted in increased obesity and cancer rates (lung, liver) in two subsequent generations of mice.
• Transgenerational effects on obesity and cancer were transferable solely through diet-associated gut bacteria.
• Administration of beneficial microbes successfully reduced transgenerational cancer and obesity risks, irrespective of prior diet.

Conclusions:

• Dietary exposures can have profound, lasting transgenerational health consequences mediated by the gut microbiome.
• Targeting gut microbes presents a promising, population-level strategy for mitigating risks of obesity and cancer.
• Microbial interventions offer a potential avenue for preventing diet-related diseases across generations.