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  • Title: Migraine chronification as an allostatic disorder: a proof-of-concept study.
    Author: Calabrò C, Di Tillo E, Pensato U, Zenesini C, Favoni V, Fontana C, Cevoli S, Tossani E, Cortelli P, Grandi S, Pierangeli G.
    Journal: Neurol Sci; 2024 Jun; 45(6):2775-2782. PubMed ID: 38261154.
    Abstract:
    OBJECTIVE: The underpinning biologics of migraine chronification are not well understood. We aim to investigate the role of the cumulative burden of stress, namely the allostatic load, in migraine chronification. METHODS: This was a cross-sectional study. The allostatic load was measured with a composite multi-system score (BALI: Bologna Allostatic Load Index), evaluating 20 biomarkers representing four physiological systems: immune, metabolic, cardiovascular, and neuroendocrinological systems. BALI score was subdivided into high score and low score based on the distribution in controls. Migraine patients were included and subclassified into low-frequency episodic migraine group (low-EM group), high-frequency episodic migraine group (high-EM group), and chronic migraine group (CM group). RESULTS: The distribution of BALI high-score increased in parallel with headache attacks monthly frequency: 16% in low-EM group (n = 10), 24% in high-EM group (n = 12), and 40% in CM group (n = 21) (p = 0.017). In a multivariable analysis, the odds ratio of having a high-score BALI in CM patients (vs. low-EM patients) was 2.78 (95% CI 1.07-7.22; p = 0.036). Individual BALI biomarkers values which were significantly different among migraine subgroups included systolic blood pressure (p = 0.018), diastolic blood pressure (p < 0.001), and heart rate (p = 0.019). CONCLUSION: Our study substantiates this emerging concept of migraine chronification as an allostatic disorder.
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