Preventing Cognitive Decline and Dementia From Cerebral Small Vessel Disease
Overview
- Phase
- Phase 2
- Intervention
- isosorbide mononitrate
- Conditions
- Cerebral Small Vessel Diseases
- Sponsor
- University of Edinburgh
- Enrollment
- 57
- Locations
- 2
- Primary Endpoint
- Tolerability proportion of patients able to tolerate the target dose
- Status
- Completed
- Last Updated
- 8 years ago
Overview
Brief Summary
Phase II pilot randomised, factorial, short term dose escalation, open label, blinded intermediary endpoint trial, in two hospital centres in the UK, of tolerability and safety of cilostazol, isosorbide mononitrate, both or neither in patients with small vessel disease manifest as symptomatic small subcortical stroke.
Detailed Description
A quarter of all ischaemic strokes are lacunar (small vessel) in type, about 35000 per annum in the United Kingdom, and due to an intrinsic, non-atheromatous, non-cardioembolic perforating cerebral arteriolar disease. 'Small vessel disease' also affects the brain diffusely, causing up to 40% of dementias, alone or mixed with Alzheimer's disease, 350,000+ patients estimated currently in the United Kingdom. There is no proven treatment: conventional antiplatelet drugs may be ineffective or even hazardous, antihypertensive treatment and statins have been disappointing. The disease mechanism is poorly understood but endothelial dysfunction, blood-brain barrier failure and vessel stiffness appear to contribute to the pathogenesis. Promising data available for licensed drugs with relevant modes of action, cilostazol (\>6000 stroke patients in the Asia Pacific region) and isosorbide mononitrate (ISMN, widely used in cardiac disease) support their testing in small vessel disease. This trial will be a phase 2, randomised, dose-escalation, factorial trial to test short-term administration of cilostazol, Isosorbide Mononitrate, both, or neither, to provide data on patient tolerability of dose (including headache, dizziness), safety (including blood pressure, platelet function), provide mechanistic evidence of efficacy (cerebrovascular reactivity, arterial compliance), and to inform the design of a larger phase 2-3 trial. The trial will recruit 60 patients with small vessel disease, in two expert stroke centres (Edinburgh and Nottingham) where there are suitable patients, expert stroke centres, established trials infrastructures and neuroimaging and platelet testing expertise. The trial will also advance methods to stratify patients by small vessel disease burden in routine practise and data on intermediary mechanistic outcomes to assist in planning future trials testing novel agents for either stroke or dementia.
Investigators
Eligibility Criteria
Inclusion Criteria
- •Mild symptomatic ischaemic stroke in the past four years compatible with a clinical lacunar stroke syndrome, with brain magnetic resonance imaging or computed tomography scanning that is compatible with a symptomatic small subcortical (lacunar) infarct, or if no recent relevant infarct is visible, that excluded other cause for symptoms
- •Age \> 35 years
- •Independent in activities of daily living (modified Rankin ≤2)
- •Able to give consent themselves
Exclusion Criteria
- •Other significant active neurological illness present since suffering stroke (eg seizures, multiple sclerosis, brain tumour)
- •Age \< 35
- •Montreal Cognitive Assessment score \<26
- •Requiring assistance with activities of daily living (Modified Rankin ≥3)
- •Active cardiac disease (atrial fibrillation, myocardial infarction in past 6 months, active angina, symptomatic cardiac failure)
- •Carotid stenosis \> 50% in the symptomatic artery territory requiring carotid endarterectomy (prior and apparently successful carotid endarterectomy is not an exclusion criterion)
- •Definite indication for, or definite contraindication to either trial drug
- •Unable to swallow
- •Bleeding tendency (platelets\<100, taking anticoagulant medication)
- •Unlikely to comply with trial medication
Arms & Interventions
Group 1
Isosorbide mononitrate 25mg bd
Intervention: isosorbide mononitrate
Group 2
Cilostazol 100mg bd
Intervention: cilostazol
Group 3
Isosorbide mononitrate 25mg bd and cilostazol 100mg bd start immediately
Intervention: isosorbide mononitrate
Group 3
Isosorbide mononitrate 25mg bd and cilostazol 100mg bd start immediately
Intervention: cilostazol
Group 4
Isosorbide mononitrate 25mg bd and cilostazol 100mg bd delayed start
Intervention: isosorbide mononitrate
Group 4
Isosorbide mononitrate 25mg bd and cilostazol 100mg bd delayed start
Intervention: cilostazol
Outcomes
Primary Outcomes
Tolerability proportion of patients able to tolerate the target dose
Time Frame: 8 weeks
proportion of patients able to tolerate the target dose
Secondary Outcomes
- Safety - recurrent stroke(12 weeks)
- Tolerability Proportion of patients with nausea that interferes with daily activities(8 weeks)
- Safety - bleeding(8 weeks)
- Efficacy - cerebrovascular function(8 weeks)
- Efficacy - systemic arterial stiffness(8 weeks)
- Tolerability Proportion of patients with dizziness that interferes with daily activities(8 weeks)
- Tolerability Proportion of patients with loose stools(8 weeks)
- Tolerability Proportion of patients with palpitations(8 weeks)
- Safety - death(12 weeks)
- Safety - blood pressure(8 weeks)
- Tolerability Proportion of patients with headache that interferes with daily activities(8 weeks)
- Tolerability Tablet count(8 weeks)