Current Evidence on Potential Uses of MicroRNA Biomarkers for Migraine: From Diagnosis to Treatment.

Migraine is a disabling and recurrent neurological disorder characterized by headache attacks that are often accompanied by sensory and motor disturbances. The value and importance of reliable biomarkers in migraine have been long recognized and a diverse range of biomarkers from biological samples to electrophysiological patterns and brain imaging has been proposed. There is still no consensus on specific biomarker(s) for migraine. Ideally, not a single but a battery of biomarkers would provide a multidisciplinary way to understand and treat migraine better. Translational research has witnessed an escalating number of studies on microRNAs (miRNAs) during the last decade. Identification of the first miRNA occurred in 1993, and currently more than 2000 human miRNAs have been recognized. miRNAs are a group of endogenous small non-coding molecules that play a key role in post-transcriptional gene processes and hence are involved in health and disease. miRNAs have already been found to be involved in the onset and progression of several human disorders including chronic pain conditions; however, there have been far fewer studies in migraine and other headaches. Current evidence does suggest that miRNAs play a role in migraine and its relief and hence these molecules are proposed as potential migraine biomarkers. This review updates the current evidence for the role of miRNAs in migraine; including their potential as biomarkers, with a role in understanding of its pathogenesis, the population at risk, diagnosis, patient stratification, chronification risk factors, response to treatments, and miRNA-based therapeutic options. Limitations exist and further research is required to completely unwrap the potential of miRNAs in migraine research and practice.