Establishment of a Signature of Circulating microRNA as a Tool to Aid Diagnosis of Primary Brain Tumors in Adults

Study Overview
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Brief Summary
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MIRNA is a prospective multi-center observational study designed to explore 762 plasma microRNAs in patients with malignant CNS tumours: 60 primary glioblastoma (GBM), 20 primary CNS lymphomas and 40 brain metastases in an attempt to establish plasma microRNA signatures specific to GBM capable of distinguishing them from malignant non-glial brain tumours. 20 patients with cerebral stroke and 20 healthy volunteers will also participate in the study, and for each patient, a panel of 762 microRNAs will be screened in plasma.

Detailed Description
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Neuro-oncology faces two challenges: establishing an accurate, rapid diagnosis and having early therapeutic response. This applies particularly to glioblastoma (GBM) since the positive diagnosis is evoked on MRI imaging and the diagnosis of certainty provided by anatomopathology. There are no perfect techniques and there are problems of differential diagnosis in imaging. Sometimes the context does not allow biopsy or excision. This study is a prospective multi-center observational study designed to be conducted in patients with malignant CNS tumours: primary glioblastoma (60 GBM), primary CNS lymphomas (20 PCNSL), brain metastases (40 BM), in an attempt to establish plasma microRNA signatures characteristic of a tumour process. Patients with cerebral stroke (20 CS) and healthy volunteers (20 HV) will also participate in the study. For each patient, a panel of 762 microRNAs will be screened in plasma. First, the investigators will focus on the potentially diagnostic nature of the signature, which may prove useful when there are problems of differential diagnosis in imaging or when the context does not permit biopsy or excision. The main objective of the study is to establish a plasma microRNA signature specific to GBM, capable of distinguishing them from malignant non-glial brain tumours (PCNSL and BM). Within the main objective, discrimination will be established between GBM and malignant non-glial brain tumours. Secondly, the quantitative approach of plasma miRNoma with 752 microRNAs studied in the different patient groups will allow for other objectives:1/ Establish plasma microRNA signatures characteristic of other types of brain tumours; 2/ Identify a plasma microRNA signature characteristic of the cerebral injury component independently of the tumor component with the CS and HV groups; 3/ Identify plasma microRNA signatures characteristic of GBM subtypes in relation to their genomic alterations; 4/ Establish correlations between plasma microRNA expression levels and data collected through multi-modality MRI imaging and anatomopathology.

Official Title
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Establishment of a Signature of Circulating microRNA as a Tool to Aid Diagnosis of Primary Brain Tumors in Adults

Conditions
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Brain Tumors

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Inclusion criteria applicable to all study subject: adults aged between 50 and 75, affiliated to social protection and having signed a consent form. Inclusion criteria for patients with a brain tumor (GBM, PCNSL): patients with clinical symptomatology and imaging suggestive of brain tumor, for whom a biopsy will be performed to make the diagnosis of certainty Inclusion criteria for patients with BM: a priori asymptomatic patients who received treatment by stereotactic radiosurgery (gamma-knife) for small circumscribed BM (diameter < 3cm, less than 3) Inclusion criteria for patients with CS: patients with clinical symptoms and imaging suggestive of acute stroke (< 24 hours, NIHSS score >5)

Ages Eligible for Study
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Minimum Age: 50 Years
Maximum Age: 75 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| GBM<br>Primary glioblastoma (GBM) | |
| PCNSL<br>Primary CNS lymphomas (PCNSL) | |
| Brain metastases<br>Brain metastases (BM) | |
| Cerebral Stroke<br>Cerebral Stroke (CS) | |
| Healthy Volunteers<br>Healthy Volunteers (HV) | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| QR (relative amount) | QR (relative amount) of each plasma microRNA for GBM and non-glial tumors (PCNSL, BM). | Up to 3 months after the end of all samplings. | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| QR value of each microRNA for all groups | QR value of each microRNA for all groups | Up to 3 months after the end of all samplings | 
| Genetic abnormalities | Genetic abnormalities of GBM subtypes | Up to 3 months after the end of the study | 
| Main imaging and anatomopathology characteristics | Description of main imaging and anatomopathological characteristics | Up to 3 months after the end of the study | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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MicroRNAs, Glioblastoma, nonglial tumors, stroke, diagnosis