Dopamine-beta-hydroxylase 19-bp insertion/deletion polymorphism affects medication overuse in patients with chronic migraine

Piero Barbanti, Fiorella Guadagni, Maria Laura De Marchis, Cristiano Ialongo, Gabriella Egeo, Luisa Fofi, Cinzia Aurilia, Domenica Lovero, David Della-Morte, Patrizia Ferroni, Raffaele Palmirotta

Research output: Contribution to journalArticlepeer-review


Dopamine-beta-hydroxylase (DBH) enzyme activity is modulated at the genetic level by the presence of several polymorphisms. Among these, the 19-bp insertion/deletion (I/D) polymorphism (rs72393728/rs141116007) was investigated in several genetic association studies for its correlation with the susceptibility to develop episodic migraine, but conflicting results were achieved. In the present study we analyzed this genetic variant in a carefully characterized population of migraineurs encompassing both episodic and chronic migraine (with and without medication overuse) with the aim to perform a replication study and verify any possible correlation with migraine endophenotypes. Genotyping of the DBH 19-bp I/D polymorphism was performed on 400 migraine patients and 204 healthy individuals. The associations between genotypic frequencies and the clinical and sociodemographic features of migraineurs were then investigated. The DBH 19-bp I/D polymorphism did not correlate with migraine susceptibility or most clinical variables, with the exception of a statistically significant correlation within the subgroup of patients affected by chronic migraine were the individuals carrying the deleted (D) allele were significantly more prone to abuse in analgesics. As a result of this finding, the DBH 19-bp I/D polymorphism does not influence migraine susceptibility, but it might contribute to the development of medication overuse in patient with chronic migraine.

Original languageEnglish
Pages (from-to)1717-1724
Number of pages8
JournalNeurological Sciences
Issue number8
Publication statusPublished - Aug 1 2019


  • 19-bp insertion/deletion polymorphism
  • Dopamine-beta-hydroxylase
  • Genetic
  • Medication overuse
  • Migraine

ASJC Scopus subject areas

  • Dermatology
  • Clinical Neurology
  • Psychiatry and Mental health


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