Efficacy of Nutūl-i-Ḥār (Hot Irrigation), a Polyherbal Unani Formulation, in the Treatment of Shaqīqa-i-Muzmin (Chronic Migraine): An Open Single-Arm Exploratory Clinical Trial

Shaqīqa-i-Muzmin (chronic migraine) is a type of migraine that is usually caused by cold humours (bārid akhlāṭ), specifically by phlegm (balgham) and to lesser extent by black bile (sauda). The aim of this study was to evaluate the effect of Nutul-i-Ḥār (hot irrigation) in the treatment of chronic migraine. Nutul (irrigation) therapy is widely and successfully used in diseases of head as described in Unānī system of medicine. This open, single-arm, exploratory clinical study was conducted in 30 patients of chronic migraine selected by convenient sampling method. One litre decoction prepared with 12 g each of Astragalus hamosus L. (Iklilul malik), Matricaria chamomilla L. (Babuna), Artemisia absinthium L. (Afsanteen), Origanum vulgare L. (Marznjosh) and Trigonella foenum graecum L. (Hulba) was poured over painful side of head for 45 minutes on every alternate day for a period of 30 days (15 sittings). The patients, thereafter, were followed untill 90th day of the study for various outcome measures comprising headache intensity, headache frequency, Migraine Disability Assessment Scale (MIDAS), and rescue medication. The reduction in headache frequency, MIDAS score and use of rescue medication was significant (p < 0.001) after the treatment. Reduction in headache intensity at 30th day, 60th day and 90th day was significant as compared with baseline values (p < 0.001) but not statistically significant at 90th day with respect to 60th day (p > 0.05). Statistical analysis was done using parametric (paired t-test) and non-parametric tests (Wilcoxan sign ranked test, Freidman with Dunn’s multiple comparison tests). Hot irrigation with medicated decoction was found effective in the treatment of chronic migraine.

Assessment of peripheral biomarkers potentially involved in episodic and chronic migraine: a case-control study with a focus on NGF, BDNF, VEGF, and PGE2

Background Several inflammatory and vascular molecules, and neurotrophins have been suggested to have a possible role in the development of migraine. However, pathophysiological events leading to migraine onset and transformation of episodic migraine (EM) to chronic migraine (CM) are not fully understood. Thus, we aimed to assess peripheral levels of nerve growth factor (NGF), brain-derived neurotrophic factor (BDNF), vascular endothelial growth factor (VEGF), and prostaglandin E2 (PGE2) in EM and CM patients, and controls. Methods From September 2017 to June 2020, 89 subjects were enrolled in a case-control study; 23 and 36 EM and CM patients, respectively, and 30 age and sex-matched controls. Demographic data and medical history were obtained from all patients. Headache characteristics were recorded at baseline visit and ensuing 30 days for persons with migraine disease. Serum levels of NGF, BDNF, VEGF, and PGE2 were measured once for controls and EM and CM patients, and adjusted for age, sex, and body mass index. Results Serum levels of NGF were significantly lower in EM patients compared to controls and CM patients (P-value=0.003 and 0.042, respectively). Serum levels of BDNF were significantly lower in EM and CM patients as opposed to controls (P-value<0.001), but comparable between EM and CM patients (P-value=0.715). Peripheral blood levels of VEGF were significantly higher in EM and CM patients as opposed to controls (P-value<0.001), but not different between EM and CM patients (P-value=0.859). Serum levels of PGE2 were significantly lower in EM patients compared to controls (P-value=0.011), however similar between EM and CM patients (P-value=0.086). In migraine patients, serum levels of NGF and PGE2 positively correlated with headache frequency (NGF: ρ = 0.476 and P-value<0.001; PGE2: ρ = 0.286 and P-value=0.028), while corresponding levels of BDNF and VEGF did not correlate with headache frequency (BDNF: ρ = 0.037 and P-value=0.778; VEGF: ρ= -0.025 and P-value=0.850). Conclusions Our findings suggest that NGF, BDNF, PGE2, and VEGF may play a significant role in migraine pathogenesis and/or chronification, and therefore might bear potential value for novel targeted abortive and prophylactic migraine therapy. Further prospective cohort studies with larger sample sizes can more robustly evaluate the implications of these findings.

Real-World Evidence for the Safety and Efficacy of CGRP Monoclonal Antibody Therapy Added to OnabotulinumtoxinA Treatment for Migraine Prevention in Adult Patients With Chronic Migraine

Background: OnabotulinumtoxinA and calcitonin gene-related peptide (CGRP) monoclonal antibodies (mAbs) target different migraine pathways, therefore, combination treatment may provide additional effectiveness for the preventive treatment of chronic migraine (CM) than either treatment alone. The objective of this study was to collect real-world data to improve the understanding of the safety, tolerability, and effectiveness of adding a CGRP mAb to onabotulinumtoxinA treatment for the preventive treatment of CM.Methods: This was a retrospective, longitudinal study conducted using data extracted from a single clinical site's electronic medical records (EMR) of adult patients (≥18 years) with CM treated with ≥2 consecutive cycles of onabotulinumtoxinA before ≥1 month of continuous onabotulinumtoxinA and CGRP mAb (erenumab, fremanezumab, or galcanezumab) combination treatment. Safety was evaluated by the rate of adverse events (AE) and serious adverse events (SAE). The proportion of patients who discontinued either onabotulinumtoxinA, a CGRP mAb, or combination treatment, and the reason for discontinuation, if available, was collected. The effectiveness of combination preventive treatment was assessed by the reduction in monthly headache days (MHD). Outcome data were extracted from EMR at the first CGRP mAb prescription (index) and up to four assessments at ~3, 6, 9, and 12 months post-index. The final analyses were based on measures consistently reported in the EMR.Results: EMR were collected for 192 patients, of which 148 met eligibility criteria and were included for analysis. Erenumab was prescribed to 56.7% of patients, fremanezumab to 42.6%, and galcanezumab to 0.7%. Mean (standard deviation [SD]) MHD were 20.4 (6.6) prior to onabotulinumtoxinA treatment and 14.0 (6.9) prior to the addition of a CGRP mAb (baseline). After real-world addition of a CGRP mAb, there were significant reductions in MHD at the first assessment (~3 months) (mean −2.6 days/month, 95% CI −3.7, −1.4) and at all subsequent visits. After ~12 months of continuous combination treatment, MHD were reduced by 4.6 days/month (95% CI −6.7, −2.5) and 34.9% of patients achieved ≥50% MHD reduction from index. AEs were reported by 18 patients (12.2%), with the most common being constipation (n = 8, 5.4% [onabotulinumtoxinA plus erenumab only]) and injection site reactions (n = 5, 3.4%). No SAEs were reported. Overall, 90 patients (60.8%) discontinued one or both treatments. The most common reason for discontinuing either treatment was lack of insurance coverage (40%); few (~14%) patients discontinued a CGRP mAb and none discontinued onabotulinumtoxinA due to safety/tolerability.Conclusion: In this real-world study, onabotulinumtoxinA was effective at reducing MHD and the addition of a CGRP mAb was safe, well-tolerated and associated with incremental and clinically meaningful reductions in MHD for those who stayed on the combination treatment. No new safety signals were identified. Of those who discontinued, the majority reported lack of insurance coverage as a reason. Prospective real-world and controlled trials are needed to further evaluate the safety and potential benefits of this combination treatment paradigm for people with CM.

Six-month therapy of CGRP monoclonal antibodies in real-world clinical practice: an interim analysis of efficacy and safety data

Introduction. Migraine is one of the most common disabling neurological disorders. Recently developed monoclonal antibodies to calcitonin gene-related peptide (CGRP) or its receptor are the first targeted medication for preventive therapy of both episodic and chronic migraine. They have been thoroughly investigated in clinical trials; however, there is little data from real-world clinical practice available to date. The aim of this study is to assess the efficacy and safety of 6 months of treatment with erenumab in real-world clinical practice and investigate the effect of the drug on the patients’ sensitivity to medicines for migraine headaches relief and patient satisfaction after treatment.Materials and methods. Our observational cohort prospective study included patients in our Headache Clinic prescribed monoclonal antibodies blocking the CGRP-receptor – erenumab. During the investigation, we evaluated the previous preventive therapy and its efficacy, the number of days with migraine per month, adverse events occurring during the erenumab treatment, depression and anxiety (HADS), migraine disability (MIDAS), the presence of allodynia (ACS-12) and improved response to acute therapy after treatment. A total of 42 patients participated in the study: 6 men, 36 women, the average age was 43.9 ± 12.2. Of them, 38 patients (90%) had chronic migraine. Thirty-two patients (76%) had previously been prescribed preventive therapy, which proved ineffective, and 10 patients (24%) had not once received any type of migraine prevention.Results. Among our patients, we identified 11 patients with resistant migraine and one patient with refractory migraine. During the study, two patients dropped out due to adverse events (constipation). Thirty patients continued the administration of erenumab 70 mg for at least six months. The average number of migraine days per month before treatment was 22.8, and after six months of treatment, it dropped to 7.3. Twenty-nine patients (72.5%) also noted that the response to acute headache treatment improved after the therapy.Conclusion. The results of our study are consistent with the international experience of using erenumab and confirm its effectiveness for migraine preventive therapy, including difficult-to-treat migraine cases. However, further studies with more participants and evaluation of predictors of successful monoclonal antibody therapy are still needed.

IL-17 crosses the blood–brain barrier to trigger neuroinflammation: a novel mechanism in nitroglycerin-induced chronic migraine

Background Chronic migraine places a disabling burden on patients, which is extensively modeled by the nitroglycerin (NTG)-treated animal model. Although the NF-κB pathway is involved in an increase in CGRP levels and activation of the trigeminal system in the NTG model, the relationship between NTG and neuroinflammation remains unclear. This study aimed to optimize a chronic NTG rat model with hyperalgesia and the ethological capacity for estimating migraine therapies and to further explore the underlying mechanism of NTG-induced migraine. Methods Rats were administered different doses of NTG s.c. daily or every 2 d; 30 min and 2 h later, the mechanical threshold was tested. After 9 d, the rats were injected with EB or Cy5.5 for the permeability assay. The other animals were sacrificed, and then, brainstem and caudal trigeminal ganglion were removed to test CGRP, c-Fos and NOS activity; Cytokines levels in the tissue and serum were measured by ELISA; and NF-κB pathway and blood–brain barrier (BBB)-related indicators were analyzed using western blotting. Immunohistochemistry was performed to observe microglial polarization and IL-17A+ T cell migration in the medulla oblongata. Results NTG (10 mg/kg, s.c., every 2 d for a total of 5 injections) was the optimal condition, resulting in progressive hyperalgesia and migraine behavior. TNC neuroinflammation with increases in cytokines, CGRP and c-Fos and activation of the NF-κB pathway was observed, and these changes were alleviated by ibuprofen. Furthermore, NTG administration increased BBB permeability by altering the levels functional proteins (RAGE, LRP1, AQP4 and MFSD2A) and structural proteins (ZO-1, Occludin and VE-cadherin-2) to increase peripheral IL-17A permeation into the medulla oblongata, activating microglia and neuroinflammation, and eventually causing hyperalgesia and migraine attack. Conclusions This study confirmed that NTG (10 mg/kg, s.c., every 2 d for a total of 5 injections) was the optimal condition to provoke migraine, resulting in mechanical hyperalgesia and observable migraine-like behavior. Furthermore, IL-17A crossed the blood–brain barrier into the medulla oblongata, triggering TNC activation through microglia-mediated neuroinflammation. This process was a novel mechanism in NTG-induced chronic migraine, suggesting that IL-17A might be a novel target in the treatment of migraine.

Migraine

Migraine is the most common disabling brain disorder. Chronic migraine, a condition characterized by the experience of migrainous headache on at least 15 days per month, is highly disabling. Patients with chronic migraine present to primary care, are often referred for management to secondary care, and make up a large proportion of patients in specialist headache clinics. Many patients with chronic migraine also have medication overuse, defined as using a compound analgesic, opioid, triptan or ergot derivative on at least 10 days per month. All doctors will encounter patients with chronic headaches. A basic working knowledge of the common primary headaches, and a rational manner of approaching the patient with these conditions, allows a specific diagnosis of chronic migraine to be made quickly and safely, and by making this diagnosis one opens up a substantial number of acute and preventive treatment options. This article discusses the current state of management of chronic migraine.