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Published on: June 2, 2014
Ictal adiponectin levels in episodic migraineurs: a randomized pilot trial
B Lee Peterlin1, Gretchen E Tietjen, Barbara A Gower
1Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA. lpeterlin@jhmi.edu
Objective:
To assess ictal adiponectin (ADP) levels before and after acute abortive treatment in women episodic migraineurs.
Methods:
Peripheral blood specimens were collected from women episodic migraineurs before and after acute abortive treatment with sumatriptan/naproxen sodium vs placebo. Univariate and multivariate models were utilized to examine the relationship between serum total ADP (T-ADP), ADP oligomers (high molecular weight [HMW], middle molecular weight, and low molecular weight [LMW]-ADP), and ADP ratio levels and pain severity. Paired t-tests and random intercept longitudinal models were utilized to assess the mean changes in T-ADP, ADP oligomers, and ratios over time in treatment responders and nonresponders.
Results:
Twenty participants (11 responders, 9 nonresponders) have been studied to date. In all participants, increases in the HMW : LMW ADP ratio were associated with an increase in pain severity. For every 1 point increase in the HMW : LMW ratio, pain severity increased by 0.22 (Confidence Interval [CI]: 0.07, 0.37; P = .004). In contrast, for every 0.25 μg/mL increase in LMW-ADP, pain severity decreased by 0.20 (CI: -0.41, -0.002; P = .047). In treatment responders, T-ADP levels were reduced at 30 minutes (12.52 ± 3.4; P = .03), 60 minutes (12.32 ± 3.2; P = .017), and 120 minutes (12.65 ± 3.2; P = .016) after treatment as compared with onset (13.48 ± 3.8). Additionally, in responders, the HMW : LMW ratio level was greater at pain onset (3.70 ± 1.9 μg/mL) as compared with nonresponders (2.29 ± 0.71 μg/mL), P = .050. Responders also showed a decrease in the HMW : LMW ratio at 60 minutes (2.37 ± 1.1; P = .002) and 120 minutes (2.76 ± 1.4; P = .02) after treatment as compared with onset (3.70 ± 1.9). These changes in responders remained significant after adjusting for covariates, including measured body mass index (m-BMI). Although nonresponders showed no significant changes in unadjusted T-ADP or ADP oligomer or ratio levels, the HMW : LMW ratio was increased in nonresponders after adjustments (P = .025).
Conclusion:
In this pilot study of women episodic migraineurs, the HMW : LMW ADP ratio level was associated with migraine severity and predictive of acute treatment response. ADP and the HMW : LMW ratio of ADP represent potential novel biomarkers and drug targets for episodic migraine.
