Calcitonin gene related peptide in familial dysautonomia.
Familial dysautonomia (FD) patients have diminished sensory C-fibers. Calcitonin gene related peptide (CGRP) is a widely distributed neuropeptide and prominent neurotransmitter in C-fibers. We show that plasma CGRP levels measured by radioimmunoassay is significantly lower in 51 FD patients compared to controls (P<0.001). In 11/51 FD patients with FD crisis and in 19/51 FD patients with pneumonia, the mean CGRP levels rose significantly as compared to their baseline (P<0.003, P<0.001, respectively).The deficiency of CGRP in FD patients is consistent with their depletion of C-fibers, and may explain some of their symptoms, either directly or via modulation of sympathetic activity.[1]References
- Calcitonin gene related peptide in familial dysautonomia. Maayan, C., Becker, Y., Gesundheit, B., Girgis, S.I. Neuropeptides (2001) [Pubmed]
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