Status and phase
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About
SJELIOT is a phase 1 trial that aims to explore the combination of prexasertib with established DNA-damaging agents used in medulloblastoma to evaluate tolerance and pharmacokinetics in recurrent or refractory disease. Additionally, a small expansion cohort will be incorporated into the trial at the combination MTD/RP2D (maximum tolerated dose/recommended phase two dose) to detect a preliminary efficacy signal.
Stratum A: Prexasertib and Cyclophosphamide
Primary Objectives
Secondary Objectives
Stratum B: Prexasertib and Gemcitabine
Primary Objectives
Secondary Objectives
Full description
Participants will be stratified by the biological characteristics of their tumor to one of two treatment strata:
STRATUM A
STRATUM B
Participants with a diagnosis of G3/G4 medulloblastoma who qualify for both treatment strata will be assigned per slot availability as well as institutional PI preference. If slots are available in both stratum A and stratum B, patients will be assigned to the dose level nearest completion.
The Rolling 6 design will be used separately in each stratum to estimate the maximum tolerated dose (MTD) or recommended phase two dose (RP2D). Therapy will be administered in cycles of 28 days and may be continued for up to 24 months (26 cycles) in the absence of disease progression or unacceptable toxicity.
Participants will receive doublet therapy in cycles of 28 days. The dose-limiting toxicity (DLT)-evaluation period will consist of the first cycle until day 1 criteria of cycle 2 has been met. Participants will be evaluated at least once a week during the DLT-evaluation period and at regular intervals thereafter. Standard tests (i.e. physical exams, blood tests, and disease evaluations) will be undertaken at regular intervals. Research-associated evaluations (i.e. pharmacokinetic studies, etc.) will also be carried out during therapy. Treatment may be continued for up to 2 years in the absence of disease progression or unacceptable toxicity.
Enrollment
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Volunteers
Inclusion and exclusion criteria
Inclusion Criteria: Screening Phase
Exclusion Criteria: Screening Phase
Inclusion Criteria: Strata A and B
Participant must be ≥1 year and <25 years of age at time of screening.
Participant must have recurrent, progressive or refractory Group 3/Group 4 or SHH medulloblastoma (per central pathology confirmation of primary tissue and/or relapsed tissue). Central pathology review previously completed at St. Jude Children's Research Hospital using equivalent methods can be used for enrollment. Note: Group 3/Group 4 may be referred to as Non-WNT Non-SHH (NWNS) in pathology reports. Medulloblastoma patients with indeterminate molecular subgroup after central pathology review are eligible for enrollment on stratum A.
Participant must have measurable or evaluable disease as defined in the protocol.
Participant must have received their last dose of myelosuppressive anticancer chemotherapy at least 3 weeks prior to study enrollment.
Participants must have had their last fraction of radiation (including CSI) at least 4 weeks prior to study enrollment. Participants who received radiation therapy for palliation must have had their last fraction of radiation at least 2 weeks prior to study enrollment.
-- Note: Participants must have relapsed with recurrent, progressive or refractory disease after any prior radiation therapy that is not considered palliative. Palliative radiation therapy is defined as local small port RT to alleviate and/or palliate symptoms. (CSI, whole brain RT, large field/port RT, or large field/port multilevel spinal RT will not be considered palliative at any dose.)
Participant who are receiving corticosteroids must be on a stable or decreasing dose for at least 1 week prior to enrollment with no plans for escalation.
Participant must have a Lansky (≤ 16 years) or Karnofsky (> 16 years) performance score of ≥50 and, in the opinion of the investigator, a minimum life expectancy of at least 6 weeks.
-- Note: Participants who are unable to walk because of paralysis, but who are up in a wheelchair, will be considered ambulatory for the purpose of assessing the performance score.
Participant must have adequate bone marrow and organ function as defined as:
Female participants of childbearing age must have a negative pregnancy test at the time of enrollment.
Participants of childbearing or child fathering potential must be willing to use medically acceptable form of birth control during treatment and for 16 weeks after stopping treatment.
Participants and/or guardian have the ability to understand and the willingness to sign a written informed consent document according to institutional guidelines.
Exclusion Criteria: Strata A and B
Primary purpose
Allocation
Interventional model
Masking
21 participants in 2 patient groups
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Data sourced from clinicaltrials.gov
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