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mechanistic
Analysis v3
History

Leucine, an amino acid from dietary protein, activates the Cav3.1 protein in hypothalamic neurons, which triggers signals that reduce hunger.

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Mechanism

Synthesis from 1 study

How it works

Eating protein releases leucine, which locks into a special calcium channel in brain cells that control hunger. This makes the channel open more easily, letting calcium flow in and turn on those cells. Once activated, the cells send a signal to stop eating and burn fat.

Most probable mechanism

In Simple Terms

When you eat protein, the amino acid leucine enters the brain and binds to a specific calcium channel called Cav3.1 in appetite-regulating neurons. This binding makes the channel open more easily when the neuron is electrically active, allowing calcium to rush in. The calcium surge activates these neurons, which send signals to stop eating and reduce food intake.

Causal chain
1

Leucine binds to a hydrophobic pocket in the Cav3.1 voltage-gated calcium channel

Verified by multiple studies
which leads to
2

Leucine binding lowers the voltage threshold required for Cav3.1 channel opening

Verified by multiple studies
which leads to
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Cav3.1 channel opening permits calcium influx into hypothalamic POMC neurons

Verified by multiple studies
which leads to
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Calcium influx activates POMC neurons, triggering downstream anorectic signaling pathways

Verified by multiple studies
which leads to
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Activated POMC neurons suppress appetite and promote weight loss through central satiety circuits

Verified by multiple studies

Evidence from Studies

Supporting (1)

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Community contributions welcome

6

Cav3.1 is a neuronal leucine sensor that mediates satiety and weight loss in response to dietary protein

Case-Control Study
Animal & In Vitro
2026 May 5

Contradicting (0)

0

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No contradicting evidence found

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Similar Assertions

In mice, the Cav3.1 calcium channel in hypothalamic neurons responds to the amino acid leucine and directly affects how much the animals eat and their body weight.

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When the Cav3.1 gene is removed from neurons in the hypothalamus, the normal reduction in food intake triggered by a high-protein diet no longer occurs.

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Changing a specific part of the Cav3.1 protein prevents it from sending signals that tell the body it is full after eating protein.

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81%

Cav3.1 channels control the entry of calcium ions into specific brain cells called POMC neurons, which are involved in signaling fullness after eating.

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Leucine binds to a specific calcium channel on POMC neurons in the brain, causing these neurons to activate and send signals that reduce food intake.

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