RESUMEN
OBJECTIVE: To assess migraine outcome after 12-month treatment with erenumab and compare patients who underwent 3-month erenumab discontinuation following the first treatment cycle with those who continued monthly administrations. METHODS: This is a multicentric observational study in patients with migraine in treatment with erenumab. After a full 12-month treatment cycle (T12), patients could either continue or discontinue erenumab for at least 3 months. Patients who underwent treatment discontinuation were assessed after 3 months (T15) to decide whether to start retreatment. Patients were then assessed following at T16 and T18. RESULTS: Thirty consecutive patients were enrolled. Nineteen patients underwent treatment suspension at T12 up to T15, whereas 11 continued prophylaxis. At T15, patients who discontinued treatment documented significantly more migraine days (17.06 ± 6.5 vs 4.8 ± 2.5; p < 0.0001) and analgesics consumption (14.8 ± 9.2 vs 4.6 ± 2.5; p = 0.002), compared with those who continued treatment. After retreatment, at T16, patients who had previously undergone discontinuation documented a significant improvement in terms of migraine days (9.01 ± 4.4 vs 17.06 ± 6.5; p < 0.0001) and analgesics consumption (9.6 ± 7.3 vs 14.8 ± 9.2; p = 0.004). Such improvement was even greater at T18, comparable with T12. CONCLUSION: After treatment discontinuation, a rapid migraine worsening was found, despite the high clinical response during treatment and at retreatment, which might be secondary to an untimely interruption of a potentially disease-modifying pharmacologic intervention. Although clinical improvement was documented after retreatment, given the high frequency and degree of worsening during discontinuation, it seems plausible-even ethical-to re-evaluate current timing of discontinuation. CLASSIFICATION OF EVIDENCE: This study provides Class III evidence that people with migraine discontinuing erenumab migraine prophylaxis after 12 months were more likely to have an increase in nonresponder status and migraine days than those who continued treatment.
RESUMEN
The immune system protects the organism from foreign invaders and foreign substances and is involved in physiological functions that range from tissue repair to neurocognition. However, an excessive or dysregulated immune response can cause immunopathology and disease. A 39-year-old man was affected by severe hepatosplenic schistosomiasis mansoni and by amyotrophic lateral sclerosis. One question that arose was, whether there was a relation between the parasitic and the neurodegenerative disease. IL-17, a proinflammatory cytokine, is produced mainly by T helper-17 CD4 cells, a recently discovered new lineage of effector CD4 T cells. Experimental mouse models of schistosomiasis have shown that IL-17 is a key player in the immunopathology of schistosomiasis. There are also reports that suggest that IL-17 might have an important role in the pathogenesis of amyotrophic lateral sclerosis. It is hypothesized that the factors that might have led to increased IL-17 in the hepatosplenic schistosomiasis mansoni might also have contributed to the development of amyotrophic lateral sclerosis in the described patient. A multitude of environmental factors, including infections, xenobiotic substances, intestinal microbiota, and vitamin D deficiency, that are able to induce a proinflammatory immune response polarization, might favor the development of amyotrophic lateral sclerosis in predisposed individuals.