Adults 12 Months to 21, any sex, with Childhood Solid Neoplasm or Recurrent Malignant Solid Neoplasm. Patients with the condition only — healthy volunteers not accepted.
Results — posted to ClinicalTrials.gov
Per-arm endpoint measurements with 95% confidence intervals where reported. Source: trial results section.
Maximum Tolerated Dose (MTD) of PrexasertibPrimary· Up to 28 days
Maximum tolerated dose or recommended phase 2 dose of prexasertib assessed by national Cancer Institute (NCI) CTCAE version 4.0 defined as the maximum dose at which fewer that one-third of patients experience a dose limiting toxicity in cycle 1
Group
Value
95% CI
Treatment (Prexasertib)
150
Number of Patients With Dose Limiting Toxicity (DLT) to PrexasertibPrimary· Up to 28 days
Number of patients with DLT to Prexasertib by dose level and study part.
Group
Value
95% CI
Part A Dose Level 1: 80 mg/m^2
0
Part A Dose Level 2: 100 mg/m^2
0
Part A Dose Level 3: 125 mg/m^2
0
Part A Dose Level 4: 150 mg/m^2
0
Part PK Dose Level 4: 150 mg/m^2
0
Area Under the Concentration Time Curve for PrexasertibPrimary· Up to 8 hours
Median (min, max) area under the concentration by time curve for prexasertib assessed at 1, 1.5, 2, 4, and 8 hours on day 1 post infusion by dose level and study part
Group
Value
95% CI
Part A Dose Level 1: 80 mg/m^2
1718.7
1215.2 – 2168.6
Part A Dose Level 2: 100 mg/m^2
2285.5
1658.4 – 3529.0
Part A Dose Level 3: 125 mg/m^2
2534.4
2080.0 – 3535.6
Part A Dose Level 4: 150 mg/m^2
4206.6
2164.9 – 5357.9
Part PK Dose Level 4: 150 mg/m^2
3097.7
2443.2 – 4282.5
Antitumor Activity of PrexasertibSecondary· Up to 2 years
Number of response evaluable patients with response (CR/PR) using the RECIST guideline version 1.1 including CR: disappearance of all target and non-target lesions; PR: at least 30% decrease in the sum of the diameters of target lesions by dose level and study part
Group
Value
95% CI
Part A Dose Level 1: 80 mg/m^2
0
Part A Dose Level 2: 100 mg/m^2
0
Part A Dose Level 3: 125 mg/m^2
0
Part A Dose Level 4: 150 mg/m^2
0
Part PK Dose Level 4: 150 mg/m^2
0
CHK1/2 Expression StatusSecondary· Up to 2 years
Number of patients with CHK1/2 expression by percent of tumor cells with CHK1/2 expression defined by quartiles.
0% Negative
Group
Value
95% CI
Part A Dose Level 1: 80 mg/m^2
2
Part A Dose Level 2: 100 mg/m^2
0
Part A Dose Level 3: 125 mg/m^2
1
Part A Dose Level 4: 150 mg/m^2
0
Part PK Dose Level 4: 150 mg/m^2
1
1-25% cells positive
Group
Value
95% CI
Part A Dose Level 1: 80 mg/m^2
0
Part A Dose Level 2: 100 mg/m^2
0
Part A Dose Level 3: 125 mg/m^2
0
Part A Dose Level 4: 150 mg/m^2
1
Part PK Dose Level 4: 150 mg/m^2
1
26-50% cells positive
Group
Value
95% CI
Part A Dose Level 1: 80 mg/m^2
1
Part A Dose Level 2: 100 mg/m^2
0
Part A Dose Level 3: 125 mg/m^2
1
Part A Dose Level 4: 150 mg/m^2
0
Part PK Dose Level 4: 150 mg/m^2
0
51-75% cells positive
Group
Value
95% CI
Part A Dose Level 1: 80 mg/m^2
2
Part A Dose Level 2: 100 mg/m^2
0
Part A Dose Level 3: 125 mg/m^2
1
Part A Dose Level 4: 150 mg/m^2
1
Part PK Dose Level 4: 150 mg/m^2
2
76-100% cells positive
Group
Value
95% CI
Part A Dose Level 1: 80 mg/m^2
1
Part A Dose Level 2: 100 mg/m^2
1
Part A Dose Level 3: 125 mg/m^2
0
Part A Dose Level 4: 150 mg/m^2
3
Part PK Dose Level 4: 150 mg/m^2
0
TP53 Deletion and/or Mutation in Tumor Tissue as a Potential Biomarker of Chk1 InhibitionSecondary· Up to 2 years
Number of patients with TP53 deletion and/or mutation of Trp53 by percent of tumor cells with TP53 deletion and/or mutation of Trp53 defined by quartiles.
0% Negative
Group
Value
95% CI
Part A Dose Level 1: 80 mg/m^2
1
Part A Dose Level 2: 100 mg/m^2
0
Part A Dose Level 3: 125 mg/m^2
1
Part A Dose Level 4: 150 mg/m^2
0
Part PK Dose Level 4: 150 mg/m^2
0
1-25% cells positive
Group
Value
95% CI
Part A Dose Level 1: 80 mg/m^2
0
Part A Dose Level 2: 100 mg/m^2
0
Part A Dose Level 3: 125 mg/m^2
0
Part A Dose Level 4: 150 mg/m^2
2
Part PK Dose Level 4: 150 mg/m^2
1
26-50% cells positive
Group
Value
95% CI
Part A Dose Level 1: 80 mg/m^2
1
Part A Dose Level 2: 100 mg/m^2
1
Part A Dose Level 3: 125 mg/m^2
0
Part A Dose Level 4: 150 mg/m^2
0
Part PK Dose Level 4: 150 mg/m^2
0
51-75% cells positive
Group
Value
95% CI
Part A Dose Level 1: 80 mg/m^2
2
Part A Dose Level 2: 100 mg/m^2
0
Part A Dose Level 3: 125 mg/m^2
1
Part A Dose Level 4: 150 mg/m^2
1
Part PK Dose Level 4: 150 mg/m^2
0
76-100% cells positive
Group
Value
95% CI
Part A Dose Level 1: 80 mg/m^2
2
Part A Dose Level 2: 100 mg/m^2
0
Part A Dose Level 3: 125 mg/m^2
1
Part A Dose Level 4: 150 mg/m^2
2
Part PK Dose Level 4: 150 mg/m^2
3
Adverse events — posted to ClinicalTrials.gov
Time frame: Up to 2 years.
Reporting threshold: 0%.
Adverse-event reports describe events observed during the trial — not all are caused by the drug.
Part A Dose Level 1: 80 mg/m^2
Serious: 3/6 (50%)
Deaths: 1/6
Part A Dose Level 2: 100 mg/m^2
Serious: 3/6 (50%)
Deaths: 1/6
Part A Dose Level 3: 125 mg/m^2
Serious: 3/6 (50%)
Deaths: 0/6
Part A Dose Level 4: 150 mg/m^2
Serious: 2/6 (33%)
Deaths: 0/6
Part PK Dose Level 4: 150 mg/m^2
Serious: 4/6 (67%)
Deaths: 1/6
Serious adverse events (30 terms)
Reaction
System
Part A Dose Level 1: 80 mg…
Part A Dose Level 2: 100 m…
Part A Dose Level 3: 125 m…
Part A Dose Level 4: 150 m…
Part PK Dose Level 4: 150 …
Abdominal pain
Gastrointestinal disorders
—
—
—
—
—
Acute kidney injury
Renal and urinary disorders
—
—
—
—
—
Apnea
Respiratory, thoracic and mediastinal disorders
—
—
—
—
—
Back pain
Musculoskeletal and connective tissue disorders
—
—
—
—
—
Buttock pain
Musculoskeletal and connective tissue disorders
—
—
—
—
—
Catheter related infection
Infections and infestations
—
—
—
—
—
Chills
General disorders
—
—
—
—
—
Confusion
Psychiatric disorders
—
—
—
—
—
Constipation
Gastrointestinal disorders
—
—
—
—
—
Delirium
Psychiatric disorders
—
—
—
—
—
Depressed level of consciousness
Nervous system disorders
—
—
—
—
—
Febrile neutropenia
Blood and lymphatic system disorders
—
—
—
—
—
Fever
General disorders
—
—
—
—
—
Gait disturbance
General disorders
—
—
—
—
—
Hydrocephalus
Nervous system disorders
—
—
—
—
—
Hypotension
Vascular disorders
—
—
—
—
—
Hypoxia
Respiratory, thoracic and mediastinal disorders
—
—
—
—
—
Infusion related reaction
General disorders
—
—
—
—
—
Lung infection
Infections and infestations
—
—
—
—
—
Nausea
Gastrointestinal disorders
—
—
—
—
—
Neutrophil count decreased
Investigations
—
—
—
—
—
Pain in extremity
Musculoskeletal and connective tissue disorders
—
—
—
—
—
Pericardial effusion
Cardiac disorders
—
—
—
—
—
Pneumothorax
Respiratory, thoracic and mediastinal disorders
—
—
—
—
—
Respiratory failure
Respiratory, thoracic and mediastinal disorders
—
—
—
—
—
Other adverse events (227 terms — click to expand)
This phase I trial studies the side effects and best dose of prexasertib in treating pediatric patients with solid tumors that have come back after a period of time during which the tumor could not be detected or does not respond to treatment. Checkpoint kinase 1 inhibitor LY2606368 may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth.
Publications & conference data
8 peer-reviewed publications reference this trial (live from Europe PMC):
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Publications: Europe PMC API search by NCT ID, retrieved 10 June 2026
Drug + disease cross-links: matched in real time against Drug Landscape's normalised drug + company + condition tables
Sponsor: as reported to ClinicalTrials.gov by Children's Oncology Group
Last refreshed: 20 December 2023
Drug Landscape aggregates and links these public records for informational use only. Always verify against the primary source before clinical or regulatory decisions. Canonical URL: https://druglandscape.com/trial/NCT02808650.