Futurity · Health

Bullfrog Brains Can Generate Own Emergency Fuel

Researchers have discovered that bullfrog brains possess a unique ability to produce their own emergency fuel source, ketone bodies, when glucose levels are low.

For decades, it was believed that most animals relied solely on glucose for brain energy, with neural activity failing when it depleted. However, a study from the University of Missouri found that bullfrogs can bypass this limitation.

Instead of relying on the liver to produce ketones from fatty acids, bullfrog brains can generate these alternative energy molecules locally. This creates a readily available backup energy reserve directly where it is needed.

This metabolic superpower may explain how bullfrogs survive their winter hibernation-like state, during which energy reserves are depleted. It allows them to quickly reactivate essential brain circuits by spring when oxygen and energy are scarce.

This finding builds on previous research showing that bullfrogs' hibernation protects neural circuits during extreme oxygen deprivation, adding another layer to their survival strategy.

The study raises questions about what triggers this switch to ketone production and how long it can be sustained, though it appears to be a robust backup system.

Scientists believe this discovery could offer insights into human brain function, as bullfrogs and humans share fundamental biological processes. Understanding how brains adapt to limited energy supplies might aid research into neurological disorders like Alzheimer's and ALS.

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