Metabolomic Profile and Proteasic Activity as Biomarkers for Early Detection of Arterial Vasospas in Arterial Vasospasm After Aneurysmal Subarachnoid Hemorrhage

Study Overview
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Brief Summary
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The subarachnoid hemorrhage (SAH) from ruptured aneurysm is a situation that is life-threatening, which is largely dependent on the occurrence of vasospasm from the 4th day after the bleeding. This vasopasm is responsible of clinical morbidity in 30 to 50% of patients. It occurs in 40% of patients with severe SAH. Despite knowing this, the clinician has no biomarker for identifying patients at risk. The project presented is original and includes a screening method without a priori to identify predictive biomarkers of vasospasm, likely to become therapeutic targets. In secondary objective we will focus on the protease activity of cerebrospinal fluid (CSF) and blood as a biomarker potential of vasoconstriction at the waning of subarachnoid hemorrhage. This study will take place over a year prospectively. The inclusion of patients will be in the SAR 1 Hospital of Timone. Patients with severe severe SAH by rupture requiring the establishment of an external ventricular derivation (EVD) will be divided into two groups and compared to one group of patients without necessitating a EVD subarachnoid hemorrhage. Group 1: Patients with vasopasm Group 2: Patient presenting no vasopasm Detection of vasopasm was defined using a consensual definition. CSF samples (through EVD) and blood will be made upon arrival of the patient in intensive care and then between the 3rd and 4th day. As the main criterion, we will identify biomarkers of vasospasm in blood and CSF without a priori assumption by metabolomics. Analysis will be by chromatography system coupled to a high resolution mass spectrometer. This method does not justify effective calculation because it is a step of generating hypotheses requiring further biological validation based on the identified targets. The secondary criteria, we will study in the blood and CSF association between matrix metalloproteinases (MMP) 2 and 9 and the occurrence of vasopasm. RESULTS: After comparative analysis of groups 1 and 2 in two phases of the study, we will define a metabolic profile that could identify predictive biomarkers vasopasm.

Official Title
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Analysis of Cerebral Spinal Fluid and Plasma After Aneurysmal Subarachnoid Hemorrhage by Evaluating a Metabolomic Profile and the Proteasic Activity as Biomarkers for Early Detection of Arterial Vasospasm

Conditions
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Subarachnoid Hemorrhage (SAH) From Ruptured Aneurysm

Intervention / Treatment
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* Other: Blood draw and cerebrospinal fluid draw


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients with severe severe SAH by rupture requiring the establishment of an external ventricular derivation (EVD) will be divided into two groups Group 1: Patients with vasopasm Group 2: Patient presenting no vasopasm Exclusion Criteria: Patients presenting an infectious or carcinologic meningitis

Ages Eligible for Study
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Minimum Age: 18 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: Diagnostic
Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Patients with severe SAH and vasospasm<br>Patients with severe SAH from ruptured aneurysm requiring the establishment of an external ventricular derivation (EVD) and presenting vasospasm | Other: Blood draw and cerebrospinal fluid draw<br> <br> |
| Experimental: Patients with severe SAH without vasospasm<br>Patients with severe SAH from ruptured aneurysm requiring the establishment of an external ventricular derivation (EVD) without vasospasm | Other: Blood draw and cerebrospinal fluid draw<br> <br> |
| Active Comparator: Patients with severe SAH without external ventricular derivati<br>Patients with severe severe SAH from ruptured aneurysm without necessitating a EVD subarachnoid hemorrhage | Other: Blood draw and cerebrospinal fluid draw<br> <br> |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| biomarkers iendtification of vasospasm | It will be identify biomarkers of vasospasm in blood and CSF without a priori assumption by metabolomics. Analysis will be by chromatography system coupled to a high resolution mass spectrometer | 3 years | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| occurrence of vasopasm | It will be study in the blood and CSF association between matrix metalloproteinases (MMP) 2 and 9 and the occurrence of vasopasm | 3 years |