Studies blood and tumor samples from people with newly diagnosed brain tumors
Compares MMP2 and MMP9 levels in blood and tumor samples from adults with glioblastoma.
Plain-language title generated from the registry record
Registry title: Prospective Cohort of Patients With Newly Diagnosed Glioblastoma: Analysis of MMP2 and MMP9 Expression and Correlation to Neuro-imaging Features.
Key facts
- Where
- Marseille, FranceSee the site
Where in France
- Assistance Publique Hôpitaux de MarseilleMarseille, FranceTaking people
Questions to ask the study team
- How often do I need to come in, and for how long each time?
- Are travel costs paid?
- Can I keep my own doctor?
- What happens if I want to stop?
Trial details
- Who runs it
- Assistance Publique Hopitaux De Marseille
- Trial code
- NCT03526822
- Record updated
- 28 January 2026
- Original description
Glioblastoma is the most frequent and aggressive primary brain tumor in adults. A team recently showed that baseline plasma levels of matrix metalloproteinase-2 (MMP2) and matrix metalloproteinase-9 (MMP9) were correlated to bevacizumab activity in patients with recurrent glioblastoma. To date, the biological rationale of this results remains unknown but MMP2 could be involved in classical angiogenesis while MMP9 could promote vasculogenesis.Read full original descriptionShow less
Prospective Cohort of Patients With Newly Diagnosed Glioblastoma: Analysis of MMP2 and MMP9 Expression and Correlation to Neuro-imaging Features.
Glioblastoma is the most frequent and aggressive primary brain tumor in adults. A team recently showed that baseline plasma levels of matrix metalloproteinase-2 (MMP2) and matrix metalloproteinase-9 (MMP9) were correlated to bevacizumab activity in patients with recurrent glioblastoma. To date, the biological rationale of this results remains unknown but MMP2 could be involved in classical angiogenesis while MMP9 could promote vasculogenesis.
The objectives are to correlate the plasma levels of MMP2 and MMP9 to their Ribonucleic acid (RNA) and protein tissue expression, activity and to patient neuro-imaging features. To analyze the changes of MMP2 and MMP9 plasma levels during peri-operative period and after radio-chemotherapy.
Methods: Plasmatic levels of MMP2, MMP9, vascular endothelial growth factor-A (VEGFA), vascular endothelial growth factor-R2 (VEGFR2), stromal cell-derived factor 1 (SDF1) and chemokine receptor-4 (CXCR4) will be analyzed by enzyme-linked immunosorbent assay (ELISA) in pre-, post-operative period, before radiotherapy, before adjuvant temozolomide and at relapse in newly diagnosed glioblastoma. RNA expression of these factors will be analyzed by reverse transcription-Polymerase chain reaction (RT-qPCR) on frozen tumor samples, whereas protein expression will be analyzed by ELISA and immunohistochemistry. Enzymatic activity of MMP2 and MMP9 will be analyzed by zymography. Tumor volume, infiltration and perfusion degrees will be analyzed on Magnetic Resonance Imaging (MRI) performed before and after surgery and before adjuvant temozolomide. Neuro-imaging characteristics will be correlated to plasma and tissue expressions of these factors.
The expected results are to better define the expression profile of MMP2, MMP9 and the change in their plasma level during treatment, a prerequisite for their clinical use.
Inclusion: Patient, male or female, aged 18 years or over; Imaging suggestive of glioblastoma; Patient eligible for excision surgery (partial, subtotal or macroscopically complete); Candidate for concomitant and adjuvant radiotherapy chemotherapy (Stupp protocol); Patient having signed an informed consent; Patient having undergone a preoperative MRI.
Exclusion: History of radiotherapy and / or chemotherapy for this lesion; Person in emergency situation, a legal person of legal age (guardianship, guardianship or legal guardianship), or unable to express his or her consent; Existence of a contraindication to the MRI; Nonoperable lesion; Scalability of a low grade lesion; No affiliation to a social security scheme (beneficiary or beneficiary); Pregnant or lactating woman.