Intensified treatment with temozolomide for adults with glioblastoma

Phase III Randomised Trial Evaluating Treatment Intensification With Temozolomide in Adults With a Glioblastoma

Phase 3 Interventional Centre Oscar Lambret · NCT03663725

This study is testing whether a more intense treatment with temozolomide can help adults with glioblastoma do better than the usual treatment.

Quick facts

PhasePhase 3
Study typeInterventional
Enrollment486 (estimated)
Ages18 Years and up
SexAll
SponsorCentre Oscar Lambret Academic / other
Drugs / interventionsradiation, chemotherapy
Locations19 sites (Amiens and 18 other locations)
Trial IDNCT03663725 on ClinicalTrials.gov

What this trial studies

This clinical trial compares an intensified treatment approach using temozolomide (TMZ) for adults diagnosed with glioblastoma to the standard EORTC regimen. Participants will be randomized to receive either early TMZ and extended adjuvant TMZ until toxicity, progression, or patient refusal, or the classical regimen of radiotherapy followed by a limited number of adjuvant TMZ cycles. The goal is to determine the optimal timing and duration of TMZ therapy to improve patient outcomes. The trial aims to address conflicting data regarding the best approach to chemotherapy in glioblastoma treatment.

Who should consider this trial

Good fit: Ideal candidates are adults aged 18 and older with a confirmed diagnosis of de novo glioblastoma and adequate performance status.

Not a fit: Patients with a diagnosis of glioblastoma that is not confirmed or those with significant comorbidities may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could lead to improved survival rates and quality of life for patients with glioblastoma.

How similar studies have performed: Other studies have shown varying results with similar approaches, but this trial aims to clarify the optimal treatment strategy for glioblastoma.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Patient ≥18 years old
* Histological diagnosis of de novo GBM (extemporaneous diagnosis or standard pathological examination). In case of extemporaneous diagnosis, the patient can be included. If the diagnosis is not confirmed, the patient will be withdrawn from study.
* Time between initial surgery/biopsy and planned start of treatment (if allocated to the experimental arm) ≤ 15 days (ideally in the first 7 days)
* Karnofsky performance status (KPS) ≥ 60%, or KPS \<60% only related to glioma-related motor paresis.
* Adequate biological functions
* Common toxicity criteria (CTC) non hematological adverse events ≤ Grade 1 (except for alopecia, nausea, vomiting and neurological symptoms)
* Females of child bearing potential must have a negative serum or urine pregnancy test within 7 days prior to initiation of treatment. Sexually active patients must agree to use adequate and appropriate contraception while on study drug and for 6 months after stopping the study drug.
* Standard radiation therapy deemed feasible (60 Gy, 30 fractions)
* Time interval of less than 43 days between initial surgery/biopsy and planned start of radiation therapy
* Written informed consent

Exclusion Criteria:

* Secondary or recurrent glioblastoma (GBM)
* Planned use of tumor-treating electric fields
* Planned use of Carmustine implants
* Prior malignancy in the last 5 years before inclusion or concomitant
* Severe myelosuppression
* Known hypersensitivity to any of the study drugs, study drug classes, excipients in the formulation or to dacarbazine (DTIC)
* Current or recent treatment with another experimental drug or patients included in a clinical therapeutic trial (in the 30 days prior to inclusion).
* Known current viral hepatitis, HIV infection or current active infectious disease
* Inability to swallow oral medications or any mal-absorption condition
* Pregnant or breastfeeding patients.
* Inability to comply with medical follow-up of the trial (geographical, social or psychic reasons)
* Person under guardianship or curatorship

Where this trial is running

Amiens and 18 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions GlioblastomatemozolomideStupp protocol
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.