Influence of MMP on Brain AVM Hemorrhage

Study Overview
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Brief Summary
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Brain vascular malformations, including arteriovenous malformations (AVM), cavernous malformations (CVM) and aneurysms, are a source of life-threatening risk of intracranial hemorrhage. The etiology and pathogenesis are unknown. There is no medical therapy presently available. Prevention of spontaneous intracerebral hemorrhage (ICH) is the primary reason to treat brain vascular malformations. The goal of this study is to: begin pilot studies to lay the groundwork for future clinical trials to develop medical therapy to decrease ICH risk. Matrix metalloproteinases (MMPs) regulate the extracellular matrix in association with various hemorrhagic brain disorders. MMP-9 has been most consistently associated with vascular wall instability and hemorrhagic brain disorders. Doxycycline, a non-specific MMP inhibitor, may enhance vascular stability, thus reducing the risk of spontaneous hemorrhage in brain vascular malformations by decreasing MMP-9 activity.

Detailed Description
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Doses will be randomized by the Pharmacy Department at UCSF for Doxycycline 100 mg/BID and Placebo BID. These will be prepared in blister-packs. Depending on enrollment/surgery date, patients will take medication either one to two weeks before surgery. Patients will be assigned to a treatment group according to a random table. Each patient will be initially provided with a 1 or 2-week supply of drug in blister packs. The patient will take the final dose of study drug on the morning of surgery. Baseline labs will be obtained and then again at time of surgery along with a piece of surgical tissue.

Official Title
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Influence of Matrix Metalloproteinase on Brain Arteriovenous Malformation Hemorrhage

Conditions
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Arteriovenous Malformations, Cavernous Angiomas, Brain Aneurysms

Intervention / Treatment
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* Drug: Doxycycline or Placebo


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: 13 years or older Female patients of child bearing age using barrier-type birth control Creatinine no greater than 2.0 mg/di Alanine aminotransferase (ALT) no greater than 2 times upper limit of normal WBC count at least 3,800/mm3 BMI within 50% of normal Exclusion Criteria: Allergy to tetracycline Unstable medical illness (unstable angina, advanced cancer, etc) over the last 30 days Female patients of child-bearing age not using effective birth control (barrier) History of vestibular disease (except benign positional vertigo) History of noncompliance with treatment or other experimental protocols Patients taking other antibiotics History of systemic lupus erythematosis Patients who are immunocompromised Patients with clinically significant hepatic dysfunction

Ages Eligible for Study
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Minimum Age: 13 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Single Group Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Doxycycline<br>Patients undergoing elective vascular malformation surgery will receive doxycycline100 mg twice a day, a dose shown to effectively decrease MMP or placebo, treatment for two weeks prior to surgery | Drug: Doxycycline or Placebo<br>* Randomized to Doxycycline 100mg 2x/day or Placebo 2x/day for 1 or2-weeks pre-operatively.<br>* Other names: Placebo;|
| Placebo Comparator: Placebo<br>Patients undergoing elective vascular malformation surgery will receive doxycycline100 mg twice a day, a dose shown to effectively decrease MMP or placebo, treatment for two weeks prior to surgery | Drug: Doxycycline or Placebo<br>* Randomized to Doxycycline 100mg 2x/day or Placebo 2x/day for 1 or2-weeks pre-operatively.<br>* Other names: Placebo;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Our primary aim is to perform a pilot study to document the effect of doxycycline therapy to decrease MMP expression in the vascular malformation tissue. |  | 1 to 2-week pre-operative | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Our secondary aims are: (1) To explore whether plasma MMP-9 levels can be used as a marker for MMP-9 inhibition in the vascular malformation lesional tissue |  | 1 to 2-week pre operative |