Prospective Cohort of Patients With Newly Diagnosed Glioblastoma: Analysis of MMP2 and MMP9 Expression and Correlation to Neuro-imaging Features.

Обзор

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.

Вмешательства

• Биопрепарат Blood sample
  Five blood sample in pre-, post-operative period, before radiotherapy, before adjuvant temozolomide and at relapse in newly diagnosed glioblastoma
• Биопрепарат Tumor sample
  One tumor sample in operative period

Первичные конечные точки

• correlate the plasma levels of MMP2 and MMP9 to their RNA and protein tissue expression by ELISA [Срок оценки: 18 months]

Критерии участия

Критерии включения

• 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

Критерии исключения

• Existence of a contraindication to the MRI
• Nonoperable lesion
• History of radiotherapy and / or chemotherapy for this lesion
• Scalability of a low grade lesion
• Person in emergency situation, a legal person of legal age (guardianship, guardianship or legal guardianship), or unable to express his or her consent
• No affiliation to a social security scheme (beneficiary or beneficiary)
• Pregnant or lactating woman

Критерии приведены из реестра в оригинале (на английском). Окончательную оценку соответствия проводит исследовательский центр.

Здоровые добровольцы: Нет

Дизайн исследования

Распределение

Не применимо

Модель

Одна группа

Маскирование

Открытое

Основная цель

Диагностика

Центры проведения

Франция · 1 центр

• Assistance Publique Hôpitaux de Marseille — Marseille

Идентификаторы

NCT: NCT03526822 · 2017-56 · 2018-A00740-55

Первоисточники (государственные реестры)

• ClinicalTrials.gov (NIH, США)

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