4. Conclusions
Although migraine dramatically influences the quality of life of the
patients, the precise pathomechanism of this type of primary headache
disorder is still lacking. The neuropeptides discussed here may have a
fundamental role in the processes of meningeal neurogenic inflammation
and pain transmission in the TNC, and peripheral and central sensitization
of the TS. Animal experimenters in the field of migraine
research still face the problem that on appropriate animal migraine
model does not yet exist. Moreover, from a clinical aspect in spite of
the alterations in these neuropeptides in the different types ofmigraine
(e.g. migraine with or without aura, or episodic or chronic migraine),
they have not achieved a function as biomarkers. Notably, however,
the actual level of any neuropeptide is determined by the rate of biosynthesis
and the rate of degradation. Therefore, themeasured levels reflect
a steady state, from which far-reaching consequences cannot be drawn
without the investigation of the turnover. Further preclinical and clinical
research is needed for a better understanding of the roles of the