Neurogenic inflammation

Neurogenic inflammation

Neurogenic inflammation is inflammation arising from the local release from afferent neurons of inflammatory mediators such as Substance P and Calcitonin Gene-Related Peptide (CGRP).

This process appears to play an important role in the pathogenesis of numerous diseases including psoriasis,[1][2] asthma,[3] fibromyalgia, eczema, rosacea, dystonia, multiple chemical sensitivity,[4][5] and migraine.[6][7][8]

In migraine, stimulation of the trigeminal nerve causes neurogenic inflammation via release of neuropeptides including Substance P, nitric oxide, vasoactive intestinal polypeptide, 5-HT, Neurokinin A and CGRP.[9][10] leading to a "sterile neurogenic inflammation."[11]



The treatment of migraine with CGRP blockers show promise.[12] In early trials, the first oral nonpeptide CGRP antagonist, MK-0974 (Telcagepant), was shown effective in the treatment of migraine attacks,[13] but elevated liver enzymes in two participants were found. Other therapies and other links in the neurogenic inflammatory pathway for interruption of disease are under study, including migraine therapies.[14]

Noting that botulinum toxin has been shown to have an effect on inhibiting neurogenic inflammation, and evidence suggesting the role of neurogenic inflammation in the pathogenesis of psoriasis,[15] the University of Minnesota has begun a clinical trial to follow up on the observation that patients treated with botulinum toxin for dystonia had dramatic improvement in psoriasis.[16]

Astelin (Azelastine) "is indicated for symptomatic treatment of vasomotor rhinitis including rhinorrhea, nasal congestion, and post nasal drip in adults and children 12 years of age and older."[17]

Statins may be useful for treating diseases presenting with predominant neurogenic inflammation [18]


Magnesium deficiency causes neurogenic inflammation in a rat model. Researchers have theorized that since substance P which appears at day five of induced magnesium deficiency, is known to stimulate in turn the production of other inflammatory cytokines including IL-1, IL-6, and TNF-alpha, which begin a sharp rise at day 12, substance P is a key in the path from magnesium deficiency to the subsequent cascade of neuro-inflammation.[19] In a later study, researchers observed bone loss in rats that received reduced levels of dietary magnesium, but within the range of dietary intake found in the human population. Even that marginal magnesium deficiency was found to result in an increase in substance P, TNFalpha, and IL1beta. These and other data support the notion that deficient dietary magnesium intake, even at levels not uncommon in humans, not only triggers neurogenic inflammation but may also be a risk factor for osteoporosis.[20]


  1. ^ Schön and Boehncke, Psoriasis: Neurogenic inflammation and other mechanisms NEJM 352:1899-1912, Number 18, 2005
  2. ^ Saraceno, R; Kleyn, CE; Terenghi, G; Griffiths, CE (2006). "The role of neuropeptides in psoriasis". The British journal of dermatology 155 (5): 876–82. doi:10.1111/j.1365-2133.2006.07518.x. PMID 17034513. 
  3. ^ PMID 11829413
  4. ^ Orriols R, Costa R, Cuberas G, Jacas C, Castell J, Sunyer J. Brain dysfunction in multiple chemical sensitivity. J Neurol Sci. 2009 Dec 15;287(1-2):72-8. Epub 2009 Oct 3 PMID 19801154
  5. ^ Bascom, R; Meggs, WJ; Frampton, M; Hudnell, K; Killburn, K; Kobal, G; Medinsky, M; Rea, W (1997). "Neurogenic inflammation: with additional discussion of central and perceptual integration of nonneurogenic inflammation.". Environmental health perspectives 105 Suppl 2: 531–7. PMC 1469802. PMID 9167992. 
  6. ^ Frediani, F; Villani, V; Casucci, G (2008). "Peripheral mechanism of action of antimigraine prophylactic drugs". Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology 29 Suppl 1: S127–30. doi:10.1007/s10072-008-0903-8. PMID 18545913. 
  7. ^ Peroutka, SJ (2005). "Neurogenic inflammation and migraine: implications for the therapeutics". Molecular interventions 5 (5): 304–11. doi:10.1124/mi.5.5.10. PMID 16249526. 
  8. ^ Geppetti, P; Capone, JG; Trevisani, M; Nicoletti, P; Zagli, G; Tola, MR (2005). "CGRP and migraine: neurogenic inflammation revisited.". The journal of headache and pain 6 (2): 61–70. doi:10.1007/s10194-005-0153-6. PMID 16362644. 
  9. ^ Arun A Kalra, AA; Debra Elliott, D (June 2007). "Acute migraine: Current treatment and emerging therapies". Ther Clin Risk Manag (Dove Medical Press Limited) 3 (3): 449–459. PMC 2386351. PMID 18488069. Retrieved 5 December 2010. 
  10. ^ Andrea Stephanie Link, AS; Anikó Kuris et. al, A; Edvinsson, L (23 January 2008). "Treatment of migraine attacks based on the interaction with the trigemino-cerebrovascular system". J Headache Pain (Biomedical Center Lund) 9 (1): 5–12. doi:10.1007/s10194-008-0011-4. PMC 2245994. PMID 18217201. Retrieved 5 December 2010. 
  11. ^ Werner Grossmann, MD, and Hanns Schmidramsl, MD An Extract of Petasites hybridus is Effective in the Prophylaxis of Migraine Alternative Medicine Review, Volume 6, Number3 2001, Page303
  12. ^ Durham, PL; Vause, CV (2010). "Calcitonin gene-related peptide (CGRP) receptor antagonists in the treatment of migraine". CNS drugs 24 (7): 539–48. doi:10.2165/11534920-000000000-00000. PMID 20433208. 
  13. ^ Farinelli, I; Missori, S; Martelletti, P (2008). "Proinflammatory mediators and migraine pathogenesis: moving towards CGRP as a target for a novel therapeutic class". Expert review of neurotherapeutics 8 (9): 1347–54. doi:10.1586/14737175.8.9.1347. PMID 18759547. 
  14. ^ Farinelli, I; De Filippis, S; Coloprisco, G; Missori, S; Martelletti, P (2009). "Future drugs for migraine.". Internal and emergency medicine 4 (5): 367–73. doi:10.1007/s11739-009-0273-0. PMID 19551474. 
  15. ^ Saraceno, R; Kleyn, CE; Terenghi, G; Griffiths, CE (2006). "The role of neuropeptides in psoriasis". The British Journal of Dermatology 155 (5): 876–82. doi:10.1111/j.1365-2133.2006.07518.x. PMID 17034513. 
  16. ^ NCT00816517 Use of Botulinum Toxin to Treat Psoriasis
  17. ^ Product Information: Astelin®, azelastine. Wallace Laboratories, Cranbury, NJ. (PI Revised 08/2000) PI Reviewed 01/2001
  18. ^ Bucelli, RC; Gonsiorek, EA; Kim, WY; Bruun, D; Rabin, RA; Higgins, D; Lein, PJ (2008). "Statins decrease expression of the proinflammatory neuropeptides calcitonin gene-related peptide and substance P in sensory neurons". The Journal of pharmacology and experimental therapeutics 324 (3): 1172–80. doi:10.1124/jpet.107.132795. PMID 18079356. 
  19. ^ Weglicki WB, Phillips TM. Pathobiology of magnesium deficiency: a cytokine/neurogenic inflammation hypothesis PMID 1384353 Am J Physiol. 1992 Sep;263(3 Pt 2):R734-7
  20. ^ Rude, Singer, et al. Skeletal and hormonal effects of magnesium deficiency. J Am Coll Nutr. 2009 Apr;28(2):131-41. PMID 19828898 Free full text

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