Not Yet RecruitingNot Applicable

Methotrexate Early Toxicity Monitoring

France50 participantsStarted 2026-04

Plain-language summary

High-dose methotrexate (MTX) is the main componement of first line treatment in primary central nervous system lymphoma. Renal toxicity is the main dose limiting toxicity because of major MTX elimination by the kidneys. MTX crystallizes in renal tubules, leading to a renal failure (RF) and further delaying its elimination. When RF occurs, MTX accumulates, prolonging the duration of treatment exposure. MTX prolonging exposure can cause life-threatening complications and delay further treatments in the patient. Preventive measures have been developped, such as alkaline fluid hyperhydration and folic acid administration, to try to reduce the risk of these adverse events. In suspected severe RF in link to MTX is suspected, glucarpidase can be administared. However, this is an expensive treatment and not all patients recover normal renal function despite its use. MTX is an essential treatment for the management of PCNSL which is currently a curable disease especially in patients who are able to receive a consolidation treatment as thiotepa-based intensive consolidation followed by autologous stem cell transplantation (IC-ASCT). IC-ASCT requires a normal renal function, which could be impaired by severe RF secondary to MTX. The purpose of the study is to investigate how early dosing MTX could be used to simulate late concentrations. Early monitoring of MTX elimination could be implemented to identify patients at risk of delayed elimination and thus introduce rapid mesures as early administration of glucarpidase.

Who can participate

Age range

18 Years

Sex

ALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion Criteria: * Adult patient aged 18 years or older, * Patient with a primary lymphoma of the central nervous system, histologically or cytologically proven, * Patient eligible for high-dose methotrexate treatment (\> at 500 mg/m 2), in the first line of treatment, * Patient who has received information regarding the study and signed an informed consent, * Patient beneficiary or entitled to a social security scheme. Exclusion Criteria: * Patient treated with a therapy complementary to the standard 1st-line treatment based on high-dose MTX as part of a clinical research protocol, * Patient in a period of exclusion from another research protocol at the time of signing consent, * Subjects covered by articles L1121-5 to 1121-8 of the Public Health Code (minor patient, adult patient under guardianship or curatorship, patient deprived of liberty, pregnant or breastfeeding woman).

Questions worth asking your doctor

Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.

1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?

Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.

Questions for the trial coordinator

The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.

1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?

A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.

What they're measuring

Accuracy measurement of Bayesian model

Timeframe: 48 hours post MTX

Trial details

NCT IDNCT07406230

SponsorAssistance Publique Hopitaux De Marseille

Sponsor typeOTHER

Study typeINTERVENTIONAL

Primary completion2027-04

Contact for this trial

Laurence SCHENONE

04 91 38 55 00 Laurence.SCHENONE@ap-hm.fr

View on ClinicalTrials.gov More Primary Central Nervous System Lymphoma trials