A Phase 1 interventional study of Adavosertib and Olaparib in Advanced Malignant Solid Neoplasm, Metastatic Malignant Solid Neoplasm and Refractory Malignant Solid Neoplasm, sponsored by National Cancer Institute (NCI). Active, not recruiting at 1 site in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-09-30.
Sponsored by National Cancer Institute (NCI) · Phase 1, Interventional, and Treatment
This phase I trial studies the side effects and best dose of adavosertib when given together with olaparib in treating patients with solid tumors that have spread to other places in the body (advanced) with selected mutations. Adavosertib may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. PARPs are proteins that help repair DNA mutations. PARP inhibitors, such as olaparib, can keep PARP from working, so tumor cells can't repair themselves, and they may stop growing. Giving olaparib and adavosertib one after the other may shrink or stabilize advanced solid tumors as successfully as using them together, with fewer side effects.
PRIMARY OBJECTIVES:
I. To determine the safety and tolerability of olaparib in sequential treatment with adavosertib (AZD1775).
II. To establish the maximum tolerated dose/recommended phase 2 dose (MTD/RP2D) of this sequential schedule in patients with advanced solid tumors in a post-poly adenosine diphosphate (ADP) ribose polymerase inhibitor (PARPi) population.
III. To assess the safety and toxicity profile of the sequential treatment of olaparib and AZD1775 in a post-PARPi population.
SECONDARY OBJECTIVES:
I. To assess putative predictive biomarkers of response and resistance to the sequential treatment of olaparib and AZD1775 in a post-PARPi population.
II. To evaluate a novel experimental trial design involving sequential dosing of olaparib and AZD1775 in a post-PARPi population.
III. To observe and record anti-tumor activity.
OUTLINE: This is a dose-escalation study of adavosertib.
Patients receive olaparib orally (PO) twice daily (BID) on days 1-5 and 15-19 of each cycle and adavosertib PO once daily (QD) on days 8-12 and 22-26 of each cycle. Cycles repeat every 28 days for 2 years in the absence of disease progression or unacceptable toxicity.
After completion of study treatment, patients are followed up at 30 days and then every 3-6 months for up to 2 years.
3,517 studies on the registry are indexed under Neoplasm Metastasis; 885 are open to participants now.
This study's enrollment of 13 is below the median of 54 across 2,767 interventional studies indexed under Neoplasm Metastasis.
Browse Neoplasm Metastasis studies →National Cancer Institute (NCI) is the lead sponsor of 3,506 studies on the registry; 334 are open to participants now.
Of its 402 completed or terminated interventional studies of FDA-regulated products, 365 (91%) have results posted.
Counted across the registry records on this site, refreshed daily.
Patients in dose expansion Cohort A (intrinsic resistance), must have:
Patients in dose expansion Cohort B (acquired resistance) must have:
Human immunodeficiency virus (HIV)-infected (HIV1/2 antibody-positive) patients may participate if they meet all the following eligibility requirements:
They must not be currently receiving prophylactic therapy for an opportunistic infection and must not have had an opportunistic infection within the past 6 months. Monitoring for HIV-infected patients should include:
The effects of AZD1775 and olaparib on the developing human fetus are either unclear or are known to be teratogenic, women of childbearing potential and their partners, who are sexually active, must agree to the use of TWO highly effective forms of contraception in combination. This should be started from the signing of the informed consent and continue throughout the period of taking study treatment and for at least 1 month after last dose of study drug(s), or they must totally/truly abstain from any form of sexual intercourse. Male patients must use a condom during treatment and for 3 months after the last dose of study drug when having sexual intercourse with a pregnant woman or with a woman of childbearing potential. Female partners of male patients should also use a highly effective form of contraception if they are of childbearing potential. Male patients should not donate sperm throughout the period of taking study drugs and for 3 months following the last dose of study drugs.
Acceptable non-hormonal birth control methods include:
Acceptable hormonal methods:
Exclusion Criteria:
Concomitant use of CYP3A inducers/inhibitors:
Any of the following cardiac diseases currently or within the last 6 months:
Patients receive olaparib PO BID on days 1-5 and 15-19 of each cycle and adavosertib PO QD on days 8-12 and 22-26 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity.
Drug: Adavosertib · Drug: Olaparib
Given PO
Also known as: AZD 1775, AZD-1775, AZD1775, MK 1775, MK-1775, MK1775
Given PO
Also known as: AZD 2281, AZD-2281, AZD2281, KU 0059436, KU-0059436, KU0059436, Lynparza, Olanib, Olaparix, PARP Inhibitor AZD2281
Dose Limiting Toxicity
The number of patients who had dose limiting toxicity (DLT). DLT was defined as grade ≥3 non-hematological toxicity, grade 3 fatigue of greater than 1 week duration, failure to receive at least 70% of dosing due to trial drug-related toxicities, or experiencing a drug-related toxicity that meets criteria for a DLT, grade 4 thrombocytopenia or grade 3 thrombocytopenia associated with bleeding, grade 4 neutropenia ≥5 days or febrile neutropenia, Any degree of anemia, leukopenia in the absence of grade 4 neutropenia ≥4 days.
Time frame: Within the first cycle (28 days) of treatment
Incidence and Causality of Treatment-Related Adverse Events
The data represents the number of patients with reported treatment-related adverse events that were deemed at least possibly, probably, or definitely related to study treatment, and were graded based on the Common Terminology Criteria for Adverse Events, Version 5(CTCAE 5.0). Only the highest grade assigned for each treatment-related adverse event is reported.
Time frame: Approximately 2 years and 7 months. For each enrolled patient, adverse event data was captured from the period in which a patient signed the informed consent and up to 90 days after the administration of the last dose of study drug.
Maximum Tolerated Dose (MTD)
Time frame: The MTD will be identified in the dose escalation phase. Once identified, the MTD will be used by the dose expansion cohorts through study completion, which will take place for approximately 2 years after MTD is identified.
Objective Response Rate
Objective response (OR) was defined as percent of patients that achieve complete response (CR, measured as the disappearance of all target lesions), or partial response (PR, measured as ≥30% decrease in the sum of the diameters of target lesions), and it was assessed as best response per RECIST 1.1 from start of treatment until disease progression/recurrence.
Time frame: Tumor reassessment every 8 weeks from start of treatment until radiological documentation of disease progression/recurrence through study completion, for a period of approximately 3 years.
Clinical Benefit
Clinical benefit, assessed as best response per RECIST 1.1 and defined as percent of patients that achieve complete response (disappearance of all target lesions), partial response (≥30% decrease in the sum of the diameters of target lesions) or stable disease (neither sufficient shrinkage to qualify for partial response nor sufficient increase to qualify for progressive disease, taking as reference the smallest sum diameters) lasting for more than 6 months.
Time frame: Tumor reassessment every 8 weeks from start of treatment until radiological documentation of disease progression/recurrence through study completion, for a period of approximately 3 years.
Progression-free Survival (PFS)
Progression-free survival was defined as the time between the start of treatment and (i) the time of progression (defined using RECIST v1.1. as a 20% increase in the sum of the longest diameter of target lesions and an absolute increase of at least 5mm, or a measurable increase in a non-target lesion, or the appearance of new lesions) or death, whichever occurred first; or (ii) the time to the last imaging scan
Time frame: From treatment start to progression or death, whichever occurred first or to the last imaging scan.
Overall Survival (OS)
Overall survival was defined as from the time of treatment start to the time of death or last follow-up.
Time frame: Tumor reassessment every 8 weeks from start of treatment until radiological documentation of disease progression/recurrence through study completion, for a period of approximately 3 years.
This was a single site, phase I study performed at MD Anderson Cancer Center in Houston, TX. Patients were eligible to enroll in (1) the dose escalation part of the study if they had advanced solid tumors for which curative measures did not exist or were no longer effective, or (2) the dose expansion part of the study if they had advanced solid tumors with actionable DNA Damage Response mutations. The dose escalation part of the study also recruited those with relevant mutations (not mandatory).
| Milestone | Dose Level 1 (DL1) | Dose Level 2 (DL2) |
|---|---|---|
| Started | 3 | 10 |
| Completed | 3 | 9 |
| Not completed | 0 | 1 |
| Withdrew: Not evaluable for dlt per protocol (dosing less than 70% of the study drug in first cycle) | 0 | 1 |
The number of patients who had dose limiting toxicity (DLT). DLT was defined as grade ≥3 non-hematological toxicity, grade 3 fatigue of greater than 1 week duration, failure to receive at least 70% of dosing due to trial drug-related toxicities, or experiencing a drug-related toxicity that meets criteria for a DLT, grade 4 thrombocytopenia or grade 3 thrombocytopenia associated with bleeding, grade 4 neutropenia ≥5 days or febrile neutropenia, Any degree of anemia, leukopenia in the absence of grade 4 neutropenia ≥4 days.
| Participants | Dose Level 1 (DL1) | Dose Level 2 (DL2) |
|---|---|---|
| DLT | 0 | 0 |
| No DLT | 3 | 9 |
| Not evaluable for DLT | 0 | 1 |
The data represents the number of patients with reported treatment-related adverse events that were deemed at least possibly, probably, or definitely related to study treatment, and were graded based on the Common Terminology Criteria for Adverse Events, Version 5(CTCAE 5.0). Only the highest grade assigned for each treatment-related adverse event is reported.
| adverse events | DL1 - Olaparib 300 mg + AZD1775 250 mg (Grade 1) | DL1 - Olaparib 300 mg + AZD1775 250 mg (Grade 2) | DL1 - Olaparib 300 mg + AZD1775 250 mg (Grade 4) | DL2 - Olaparib 300 mg + AZD1775 300 mg (Grade 1) | DL2 - Olaparib 300 mg + AZD1775 300 mg (Grade 2) | DL2 - Olaparib 300 mg + AZD1775 300 mg (Grade 3) | DL2 - Olaparib 300 mg + AZD1775 300 mg (Grade 4) |
|---|---|---|---|---|---|---|---|
| Anemia | 2 | 0 | 0 | 6 | 1 | 0 | 1 |
| Nausea | 2 | 1 | 0 | 4 | 3 | 0 | 0 |
| Vomiting | 1 | 0 | 0 | 4 | 2 | 0 | 0 |
| Fatigue | 0 | 1 | 0 | 3 | 2 | 0 | 0 |
| Diarrhea | 2 | 0 | 0 | 2 | 0 | 1 | 0 |
| Anorexia | 0 | 0 | 0 | 2 | 1 | 0 | 0 |
| Neutrophil count decreased | 0 | 0 | 0 | 1 | 1 | 0 | 1 |
| Platelet count decreased | 0 | 0 | 1 | 2 | 0 | 0 | 0 |
| White blood cell decreased | 0 | 0 | 0 | 1 | 1 | 0 | 1 |
| Abdominal pain | 0 | 1 | 0 | 0 | 0 | 1 | 0 |
| Lipase increased | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
| Creatinine increased | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
| Dyspepsia | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
| Headache | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
| Hypotension | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
| Pain in extremity | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
| Serum amylase increased | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
Results for this outcome have not been posted.
Objective response (OR) was defined as percent of patients that achieve complete response (CR, measured as the disappearance of all target lesions), or partial response (PR, measured as ≥30% decrease in the sum of the diameters of target lesions), and it was assessed as best response per RECIST 1.1 from start of treatment until disease progression/recurrence.
| Participants | Dose Level 1 (DL1) | Dose Level 2 (DL2) |
|---|---|---|
| Objective response (Complete response + Partial response) | 0 | 2 |
| No objective response (Stable disease + Progressive disease) | 3 | 7 |
| Not evaluable | 0 | 1 |
Clinical benefit, assessed as best response per RECIST 1.1 and defined as percent of patients that achieve complete response (disappearance of all target lesions), partial response (≥30% decrease in the sum of the diameters of target lesions) or stable disease (neither sufficient shrinkage to qualify for partial response nor sufficient increase to qualify for progressive disease, taking as reference the smallest sum diameters) lasting for more than 6 months.
| Participants | Dose Level 1 (DL1) | Dose Level 2 (DL2) |
|---|---|---|
| Clinical benefit | 0 | 2 |
| No clnical benefit | 3 | 7 |
| Not evaluable | 0 | 1 |
Progression-free survival was defined as the time between the start of treatment and (i) the time of progression (defined using RECIST v1.1. as a 20% increase in the sum of the longest diameter of target lesions and an absolute increase of at least 5mm, or a measurable increase in a non-target lesion, or the appearance of new lesions) or death, whichever occurred first; or (ii) the time to the last imaging scan
Results for this outcome have not been posted.
Overall survival was defined as from the time of treatment start to the time of death or last follow-up.
Results for this outcome have not been posted.
Collected over Time elapsed between the time the patient signed the informed consent and up to 90 days after the last administration of the last dose of study drug, for a period of approximately 3 years.. Non-serious events are listed at a 0% frequency threshold.
| Group | Deaths | Serious | Other |
|---|---|---|---|
| Dose Level 1 (DL1) | 3/3 (100%) | 1/3 (33.3%) | 3/3 (100%) |
| Dose Level 2 (DL2) | 5/10 (50%) | 5/10 (50%) | 10/10 (100%) |
| Event | Dose Level 1 (DL1) | Dose Level 2 (DL2) |
|---|---|---|
| Platelet count decreasedBlood and lymphatic system disorders | 1/3 | 0/10 |
| Pain in extremityMusculoskeletal and connective tissue disorders | 0/3 | 1/10 |
| AscitesGastrointestinal disorders | 0/3 | 1/10 |
| FeverGeneral disorders | 0/3 | 1/10 |
| Abdominal painGastrointestinal disorders | 0/3 | 1/10 |
| NauseaGastrointestinal disorders | 0/3 | 1/10 |
| VomitingGastrointestinal disorders | 0/3 | 1/10 |
| Tumor painGeneral disorders | 0/3 | 1/10 |
| Small intestinal obstructionGastrointestinal disorders | 0/3 | 1/10 |
| ConstipationGastrointestinal disorders | 0/3 | 1/10 |
| Event | Dose Level 1 (DL1) | Dose Level 2 (DL2) |
|---|---|---|
| NauseaGastrointestinal disorders | 3/3 | 6/10 |
| AnemiaBlood and lymphatic system disorders | 2/3 | 9/10 |
| FatigueGeneral disorders | 1/3 | 7/10 |
| Abdominal painGastrointestinal disorders | 2/3 | 3/10 |
| ConstipationGastrointestinal disorders | 2/3 | 1/10 |
| DiarrheaGastrointestinal disorders | 2/3 | 3/10 |
| Lipase increasedInvestigations | 2/3 | 2/10 |
| Serum amylase increasedInvestigations | 2/3 | 2/10 |
| AnorexiaMetabolism and nutrition disorders | 2/3 | 6/10 |
| VomitingGastrointestinal disorders | 1/3 | 5/10 |
All the 13 participants enrolled in the dose escalation phase
| Age, Categorical(Participants) | Dose Level 1 (DL1) | Dose Level 2 (DL2) | Total |
|---|---|---|---|
| <=18 years | 0 | 0 | 0 |
| Between 18 and 65 years | 2 | 9 | 11 |
| >=65 years | 1 | 1 | 2 |
| Age, Continuous(Years) | Dose Level 1 (DL1) | Dose Level 2 (DL2) | Total |
|---|---|---|---|
| Mean | 61 (34 to 67) | 50.5 (34 to 71) | 52 (34 to 71) |
| Sex: Female, Male(Participants) | Dose Level 1 (DL1) | Dose Level 2 (DL2) | Total |
|---|---|---|---|
| Female | 1 | 10 | 11 |
| Male | 2 | 0 | 2 |
| Ethnicity (NIH/OMB)(Participants) | Dose Level 1 (DL1) | Dose Level 2 (DL2) | Total |
|---|---|---|---|
| Hispanic or Latino | 0 | 0 | 0 |
| Not Hispanic or Latino | 3 | 10 | 13 |
| Unknown or Not Reported | 0 | 0 | 0 |
| Race (NIH/OMB)(Participants) | Dose Level 1 (DL1) | Dose Level 2 (DL2) | Total |
|---|---|---|---|
| American Indian or Alaska Native | 0 | 0 | 0 |
| Asian | 0 | 0 | 0 |
| Native Hawaiian or Other Pacific Islander | 0 | 0 | 0 |
| Black or African American | 0 | 0 | 0 |
| White | 3 | 9 | 12 |
| More than one race | 0 | 0 | 0 |
| Unknown or Not Reported | 0 | 1 | 1 |
| Region of Enrollment(Participants) | Dose Level 1 (DL1) | Dose Level 2 (DL2) | Total |
|---|---|---|---|
| United States | 3 | 10 | 13 |
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