Astrocyte-derived lactate in stress disorders.

Area of Science:

• Neurobiology
• Psychiatry
• Cellular Metabolism

Background:

• Stress disorders are psychiatric conditions linked to trauma, often co-occurring with other mental illnesses.
• While neurons are traditionally studied, astrocytes are increasingly recognized for their role in stress-related disorders.
• Astrocytes provide structural support, regulate synaptic function, protect neurons, and supply metabolic energy via the astrocyte-neuron lactate shuttle (ANLS) model.

Purpose of the Study:

• To review the involvement of astrocytes and brain energy metabolism in stress disorders.
• To explore the role of lactate as an energy source and its potential antidepressant effects in stress-related conditions.

Main Methods:

• Literature review of studies on astrocytes, brain energy metabolism, and stress disorders.
• Analysis of the astrocyte-neuron lactate shuttle model and lactate's signaling functions.
• Examination of emerging research on lactate's antidepressant properties.

Main Results:

• Astrocytes play active roles beyond support, including synaptic regulation and neuronal protection.
• The ANLS model emphasizes astrocyte-derived lactate for neuronal energy demands.
• Lactate is emerging as a signaling molecule with potential antidepressant activity relevant to stress disorders.

Conclusions:

• Astrocytes are integral to the neurobiology of stress disorders.
• Brain energy metabolism, particularly lactate supply by astrocytes, is critical in stress.
• Lactate presents a promising therapeutic target for stress-related disorders due to its antidepressant potential.