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- W3080217715 abstract "Calcitonin gene-related peptide plays a key role in cluster headache pathophysiology. It is released from the trigeminal nerve, which also innervates the eye. In this study, we tested if tear fluid calcitonin gene-related peptide measurement detects elevated calcitonin gene-related peptide levels in cluster headache patients compared to controls.Calcitonin gene-related peptide concentration in tear fluid and plasma of 16 active episodic and 11 chronic cluster headache patients (all outside acute attacks) and 60 controls were assessed using ELISA.Cluster headache patients without use of attack abortive medication in the last 48 h showed significantly elevated tear fluid calcitonin gene-related peptide levels (1.78 ± 1.57 ng/ml, n = 17) compared to healthy controls (0.79 ± 0.74 ng/ml, p = 0.003) and compared to cluster headache patients who had used attack abortive medication in the last 48 h (0.84 ± 1.40 ng/ml, n = 10, p = 0.022). High calcitonin gene-related peptide levels in cluster headache patients were independent of the occurrence of a cluster headache attack in the last 48 hours (no attack: 1.95 ± 1.65 ng/ml, n = 8; attack: 1.63 ± 1.59 ng/ml, n = 9, p = 0.82) as long as no acute medication was used. No significant difference in tear fluid calcitonin gene-related peptide levels between episodic (1.48 ± 1.34 ng/ml) and chronic cluster headache patients (2.21 ± 1.88 ng/ml, p = 0.364) was detected. In contrast to these results in tear fluid, there were no significant group differences in plasma calcitonin gene-related peptide levels.This study shows that active cluster headache patients have increased calcitonin gene-related peptide levels in tear fluid compared to healthy subjects, which are reduced to control levels after intake of attack abortive medication. Calcitonin gene-related peptide measurement in tear fluid is non-invasive, and has the advantage of allowing direct access to calcitonin gene-related peptide released from the trigeminal nerve." @default.
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- W3080217715 date "2020-08-26" @default.
- W3080217715 modified "2023-09-23" @default.
- W3080217715 title "Baseline tear fluid CGRP is elevated in active cluster headache patients as long as they have not taken attack abortive medication" @default.
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- W3080217715 doi "https://doi.org/10.1177/0333102420949858" @default.
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