The genetics of migraine

Area of Science:

• Neurology
• Genetics
• Epidemiology

Background:

• Clinical, pathophysiological, and genetic studies suggest migraine without aura (MO) and migraine with aura (MA) are distinct entities.
• First-degree relatives of individuals with MO have a two-fold increased risk of MO, while relatives of those with MA have a four-fold increased risk of MA.

Purpose of the Study:

• To explore the distinct genetic underpinnings and inheritance patterns of migraine without aura and migraine with aura.
• To investigate the genetic heterogeneity of familial hemiplegic migraine (FHM).

Main Methods:

• Review of clinical, pathophysiological, and genetic studies on migraine.
• Analysis of familial risk and inheritance patterns for MO and MA.
• Genetic linkage studies for familial hemiplegic migraine (FHM).

Main Results:

• MO and MA are considered distinct migraine types.
• Multifactorial inheritance is the likely mode for both MO and MA, without significant generational differences.
• Familial hemiplegic migraine (FHM) is a rare autosomal dominant subtype of MA, with identified genetic heterogeneity.

Conclusions:

• Migraine subtypes exhibit distinct genetic and epidemiological profiles.
• Further research is expected to identify specific genetic loci for common migraine types (MO and MA).
• Genetic heterogeneity is a key factor in understanding familial hemiplegic migraine (FHM).