Introduction: Nicotine is a potent anti-inflammatory alkaloid that has demonstrated modest preclinical and clinical benefit in a number of inflammatory-mediated pathologies. In the setting of intracerebral hemorrhage (ICH), inflammation is a central component of secondary injury, and nicotine administration in experimental ICH has led to significant improvements in functional outcome. Here, we sought to evaluate the safety of transdermal nicotine in a cohort of ICH patients in a phase Ib clinical trial.
Methods: This was a “3+3” dose-escalation trial. Eligibility criteria include age =18 years, radiologically confirmed diagnosis of ICH and ability to initiate transdermal nicotine patch within 72 hours of symptom onset. The first cohort of three patients received a low-dose (7-mg) transdermal nicotine patch once daily beginning on the day of enrollment and for 14 consecutive days or until hospital discharge, whichever came first. The subsequent cohort of three patients received the intermediate dose (14-mg) patch according to the same regimen, and the final cohort received the high-dose (21-mg) patch. Safety monitoring consisted of twice-daily examinations for the duration of drug administration, and a drug-safety monitoring board (DSMB) convened every three months throughout the trial.
Results: Nine patients were enrolled. The mean and median number of patches administered was 8.375 and 7, respectively. One patient experienced a non-ST elevation myocardial infarction during treatment, but this was determined by the DSMB to be unrelated to the administration of transdermal nicotine.
Conclusions: Nine patients were enrolled. The mean and median number of patches administered was 8.375 and 7, respectively. One patient experienced a non-ST elevation myocardial infarction during treatment, but this was determined by the DSMB to be unrelated to the administration of transdermal nicotine. No drug-related adverse events were experienced by any of the enrolled patients.
Patient Care: This research could lead to a phase II and/or phase III trial to evaluate nicotine as an anti-inflammatory or neuroprotectant medication in the intracerebral hemorrhage population.
Learning Objectives: By the conclusion of this session, partipants shoudl be able to: 1) discuss outcome following ICH, 2) discuss the importance of edema in ICH, and 3) identify the current treatment options in ICH
References: 1. Morgenstern LB, Hemphill JC, Anderson C, Becker K, Broderick JP, Connolly ES, et al. Guidelines for the management of spontaneous intracerebral hemorrhage: a guideline for healthcare professionals from the American Heart Association/American Stroke Association. Stroke. 2010. p. 2108–29.
2. Ducruet AF, Zacharia BE, Hickman ZL, Grobelny BT, Yeh ML, Sosunov SA, et al. The complement cascade as a therapeutic target in intracerebral hemorrhage. Exp. Neurol. 2009 Oct;219(2):398–403.
3. Rynkowski MA, Kim GH, Garrett MC, Zacharia BE, Otten ML, Sosunov SA, et al. C3a receptor antagonist attenuates brain injury after intracerebral hemorrhage. J. Cereb. Blood Flow Metab. 2009 Jan;29(1):98–107.
4. Rynkowski MA, Kim GH, Komotar RJ, Otten ML, Ducruet AF, Zacharia BE, et al. A mouse model of intracerebral hemorrhage using autologous blood infusion. Nat Protoc. 2008;3(1):122–8.
5. Ducruet AF, Zacharia BE, Sosunov SA, Gigante PR, Yeh ML, Gorski JW, et al. Complement inhibition promotes endogenous neurogenesis and sustained anti-inflammatory neuroprotection following reperfused stroke. PLoS ONE. 2012;7(6):e38664. PMCID: PMC3383680
6. Mocco J, Sughrue ME, Ducruet AF, Komotar RJ, Sosunov SA, Connolly ES. The complement system: a potential target for stroke therapy. Adv. Exp. Med. Biol. 2006;586:189–201.
7. Haque R, Hwang BY, Appelboom G, Piazza MA, Guo K, Connolly ES. Alterations in systemic complement component 3a and 5a levels in patients with cerebral arteriovenous malformations. J Clin Neurosci. 2011 Sep;18(9):1235–9.
8. Appelboom G, Bruce SS, Hickman ZL, Zacharia BE, Carpenter AM, Vaughan KA, et al. Volume-dependent effect of perihaematomal oedema on outcome for spontaneous intracerebral haemorrhages. J. Neurol. Neurosurg. Psychiatr. 2013 Jan 23.
9. Brunswick AS, Hwang BY, Appelboom G, Hwang RY, Piazza MA, Connolly ES. Serum biomarkers of spontaneous intracerebral hemorrhage induced secondary brain injury. J. Neurol. Sci. 2012 Oct 15;321(1-2):1–10.
10. Garrett MC, Otten ML, Starke RM, Komotar RJ, Magotti P, Lambris JD, et al. Synergistic neuroprotective effects of C3a and C5a receptor blockade following intracerebral hemorrhage. Brain Res. 2009 Nov 17;1298:171–7. PMCID: PMC2760685