Early Life Stress induces brain-wide electrical network predisposition to migraine

Area of Science:

• Neuroscience
• Migraine Pathophysiology
• Stress and Brain Health

Background:

• Migraine is a complex neurological disorder characterized by severe headaches and sensory disturbances.
• Childhood stress is a known risk factor for developing migraine in adulthood.
• Calcitonin gene-related peptide (CGRP) plays a critical role in migraine pathophysiology and can induce migraine-like symptoms.

Purpose of the Study:

• To investigate how early life stress affects CGRP-mediated migraine-like activity.
• To examine the impact of early life stress on migraine-related neural circuitry.
• To understand the mechanisms underlying stress-induced migraine vulnerability.

Main Methods:

• An early life stress paradigm was implemented in CD1 mice.
• Peripheral CGRP's effect on migraine-like behavior was assessed.
• Multi-site in vivo neurophysiology and changepoint analysis were used to study neural network responses.

Main Results:

• Early life stress exacerbated migraine-related behaviors and network physiology.
• CGRP induced disruptions in neural oscillatory activity across multiple brain regions (ACC, AMY, thalamus, PBN).
• Early life stress worsened CGRP-induced disruptions, particularly in amygdala-thalamic coherence, while sumatriptan showed partial rescue.

Conclusions:

• Early life stress confers vulnerability to migraine.
• Stress impacts both behavioral and neural network responses to CGRP.
• This study identifies hypersusceptible individuals within a migraine-prone network.