Use of Minocycline in Intracerebral Hemorrhage

Overview

To date, no neuroprotective drugs have demonstrated clinical efficacy in intracerebral hemorrhage (ICH). This study will use intravenous (IV) minocycline in ICH to evaluate for (1) safety/ tolerability and (2) evaluate for clinical efficacy

Intracerebral hemorrhage (ICH) remains a devastating neurological disorder with high mortality and poor prognosis with unchanged mortality rates (53-59%). Acute treatment options for ICH remain supportive with no available effective drug or surgical therapy. All trials so far have failed to improve clinical outcome in randomized, double-blinded trials. However, one area of interest has been maintaining the integrity of the blood-brain-barrier (BBB) and preventing the growth of vasogenic edema. Matrix metalloproteinases (MMP) are a family of ubiquitous zinc-dependent endopeptidase enzymes whose primary function is the digestion of collagen type IV, laminin, and fibronectin for the purpose of remodeling extracellular basal lamina. Elevated MMP-9 as a pathological process associated with larger hematoma volume, larger perihematomal edema, and poorer clinical outcome in intracerebral hemorrhage is well documented in animal models and patients. One particular MMP-9 inhibitor gaining usage in cerebrovascular disease is minocycline. Normally FDA-approved for bacterial infection and acne vulgaris, minocycline has also been found to be both a safe and effective treatment in ischemic stroke; its potential role as a neuroprotectant in ischemic stroke is currently being tested in a large, randomized, double-blinded trial. Minocycline's beneficial role as a neuroprotectant may also extend to ICH. By inhibiting MMP-9, minocycline may decrease BBB permeability, resulting in less perihematomal edema and decreased mass effect. Although numerous animal ICH models support minocycline's role as an inhibitor of MMP-9 and neuroprotectant, its use has never been studied in humans with ICH.

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