Non-coding variants in VAMP2 and SNAP25 affect gene expression: potential implications in migraine susceptibility

Area of Science:

• Neuroscience
• Genetics
• Molecular Biology

Background:

• Migraine is a complex neurological disorder influenced by multiple gene variants affecting synaptic function.
• The precise molecular mechanisms of migraine pathogenesis remain incompletely understood.
• Regulatory non-coding variants are emerging as potential contributors to migraine development.

Purpose of the Study:

• To investigate the functional impact of candidate non-coding variants (VAMP2_rs1150, SNAP25_rs2327264, STX1A_rs6951030) within regulatory elements on gene expression.
• To explore the role of these variants in the context of the SNARE complex, crucial for neurotransmitter release.
• To assess the potential implications of these variants for migraine susceptibility.

Main Methods:

• Reporter gene assays were employed to assess the regulatory effects of non-coding variants.
• Gene expression changes associated with specific risk alleles (VAMP2_rs1150, SNAP25_rs2327264, STX1A_rs6951030) were measured.
• Experiments were conducted in neuronal-like cells to mimic relevant biological conditions.

Main Results:

• Reporter gene assays confirmed that VAMP2_rs1150 and SNAP25_rs2327264 non-coding variants significantly affect gene expression.
• The VAMP2 risk allele was associated with decreased gene expression, while the SNAP25 risk allele showed increased gene expression.
• The STX1A risk allele exhibited a trend towards reduced luciferase activity, suggesting a potential impact on gene expression.

Conclusions:

• The non-coding variants VAMP2_rs1150 and SNAP25_rs2327264 demonstrably alter gene expression, suggesting a role in migraine susceptibility.
• These findings highlight the importance of regulatory variants in the SNARE complex in migraine pathogenesis.
• Further investigation into the mechanisms, including transcription factor and micro-RNA binding, is warranted to elucidate the link between SNAREs dysregulation and migraine.