Trial Outcomes & Findings for A Phase II Clinical Trial Evaluating the Combination of Olaparib and Temozolomide for the Treatment of Advanced Uterine Leiomyosarcoma (NCT NCT03880019)

NCT ID: NCT03880019

Last Updated: 2025-12-03

Results Overview

Will be measured by Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 criteria assessed by MRI: Complete Response (CR), disappearance of all target lesions, any pathological lymph nodes (whether target or non-target) must have reduction in short axis to \<10 mm (\<1 cm); Partial Response (PR), at least a 30% decrease in the sum of the diameters of target lesions, taking as reference the baseline sum diameters. A response rate of 10% is considered inactive and unworthy of further study. A response rate of 35% would be promising for further study among patients with advanced uterine leiomyosarcoma (LMS) treated with at least one prior systemic regimen. A response rate of 35% for the temozolomide (TMZ) + poly(adenosine diphosphate\[ADP\]-ribose) polymerase inhibitor (PARPi) combination would also be suggestive of superior efficacy over TMZ monotherapy in sarcoma. Will be reported with a 95% confidence interval.

Recruitment status

ACTIVE_NOT_RECRUITING

Study phase

PHASE2

Target enrollment

23 participants

Primary outcome timeframe

Within first 6 months of study treatment

Results posted on

2025-12-03

Participant Flow

One enrolled patient did not begin treatment.

Participant milestones

Participant milestones
Measure
Treatment (Olaparib, Temozolomide)
Patients receive olaparib PO BID and temozolomide PO QD on days 1-7. Cycles repeat every 21 days in the absence of disease progression or unacceptable toxicity. Patients undergo CT or MRI once every 2 cycles. For patients who continue beyond 12 cycles, MRI or CT imaging may be changed to once every 4 cycles. Patients undergo tumor biopsy cycle 2 days 3-5. \> \> Computed Tomography: Undergo CT \> \> Core Biopsy: Undergo tumor biopsy \> \> Magnetic Resonance Imaging: Undergo MRI \> \> Olaparib: Given orally (PO) \> \> Temozolomide: Given PO
Overall Study
STARTED
23
Overall Study
COMPLETED
22
Overall Study
NOT COMPLETED
1

Reasons for withdrawal

Reasons for withdrawal
Measure
Treatment (Olaparib, Temozolomide)
Patients receive olaparib PO BID and temozolomide PO QD on days 1-7. Cycles repeat every 21 days in the absence of disease progression or unacceptable toxicity. Patients undergo CT or MRI once every 2 cycles. For patients who continue beyond 12 cycles, MRI or CT imaging may be changed to once every 4 cycles. Patients undergo tumor biopsy cycle 2 days 3-5. \> \> Computed Tomography: Undergo CT \> \> Core Biopsy: Undergo tumor biopsy \> \> Magnetic Resonance Imaging: Undergo MRI \> \> Olaparib: Given orally (PO) \> \> Temozolomide: Given PO
Overall Study
Competing disease
1

Baseline Characteristics

A Phase II Clinical Trial Evaluating the Combination of Olaparib and Temozolomide for the Treatment of Advanced Uterine Leiomyosarcoma

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
Treatment (Olaparib, Temozolomide)
n=22 Participants
Patients receive olaparib PO BID and temozolomide PO QD on days 1-7. Cycles repeat every 21 days in the absence of disease progression or unacceptable toxicity. Patients undergo CT or MRI once every 2 cycles. For patients who continue beyond 12 cycles, MRI or CT imaging may be changed to once every 4 cycles. Patients undergo tumor biopsy cycle 2 days 3-5.\> \> Computed Tomography: Undergo CT\> \> Core Biopsy: Undergo tumor biopsy\> \> Magnetic Resonance Imaging: Undergo MRI\> \> Olaparib: Given orally (PO)\> \> Temozolomide: Given PO
Age, Continuous
55 years
n=3 Participants
Sex: Female, Male
Female
22 Participants
n=3 Participants
Sex: Female, Male
Male
0 Participants
n=3 Participants
Race (NIH/OMB)
American Indian or Alaska Native
1 Participants
n=3 Participants
Race (NIH/OMB)
Asian
0 Participants
n=3 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
n=3 Participants
Race (NIH/OMB)
Black or African American
3 Participants
n=3 Participants
Race (NIH/OMB)
White
17 Participants
n=3 Participants
Race (NIH/OMB)
More than one race
0 Participants
n=3 Participants
Race (NIH/OMB)
Unknown or Not Reported
1 Participants
n=3 Participants
Region of Enrollment
United States
22 Participants
n=3 Participants
Stage at Study Entry
Locally advanced/unresectable
3 Participants
n=3 Participants
Stage at Study Entry
Metastatic
17 Participants
n=3 Participants
Stage at Study Entry
Unknown
2 Participants
n=3 Participants
Prior Lines of Treatment
1-2
9 Participants
n=3 Participants
Prior Lines of Treatment
3 or more
13 Participants
n=3 Participants
ECOG Performance Status
0
7 Participants
n=3 Participants
ECOG Performance Status
1
15 Participants
n=3 Participants

PRIMARY outcome

Timeframe: Within first 6 months of study treatment

Will be measured by Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 criteria assessed by MRI: Complete Response (CR), disappearance of all target lesions, any pathological lymph nodes (whether target or non-target) must have reduction in short axis to \<10 mm (\<1 cm); Partial Response (PR), at least a 30% decrease in the sum of the diameters of target lesions, taking as reference the baseline sum diameters. A response rate of 10% is considered inactive and unworthy of further study. A response rate of 35% would be promising for further study among patients with advanced uterine leiomyosarcoma (LMS) treated with at least one prior systemic regimen. A response rate of 35% for the temozolomide (TMZ) + poly(adenosine diphosphate\[ADP\]-ribose) polymerase inhibitor (PARPi) combination would also be suggestive of superior efficacy over TMZ monotherapy in sarcoma. Will be reported with a 95% confidence interval.

Outcome measures

Outcome measures
Measure
Treatment (Olaparib, Temozolomide)
n=22 Participants
Patients receive olaparib PO BID and temozolomide PO QD on days 1-7. Cycles repeat every 21 days in the absence of disease progression or unacceptable toxicity. Patients undergo CT or MRI once every 2 cycles. For patients who continue beyond 12 cycles, MRI or CT imaging may be changed to once every 4 cycles. Patients undergo tumor biopsy cycle 2 days 3-5. \> \> Computed Tomography: Undergo CT \> \> Core Biopsy: Undergo tumor biopsy \> \> Magnetic Resonance Imaging: Undergo MRI \> \> Olaparib: Given orally (PO) \> \> Temozolomide: Given PO
Confirmed Objective Response Rate (ORR) (Complete Response + Partial Response)
5 Participants

SECONDARY outcome

Timeframe: Up to 2 years after study treatment

Recorded at each clinical visit and will be categorized according to National Cancer Institute Common Terminology Criteria for Adverse Events version 5.0. Number of patients experiencing a grade 3 or greater adverse event will be reported.

Outcome measures

Outcome measures
Measure
Treatment (Olaparib, Temozolomide)
n=22 Participants
Patients receive olaparib PO BID and temozolomide PO QD on days 1-7. Cycles repeat every 21 days in the absence of disease progression or unacceptable toxicity. Patients undergo CT or MRI once every 2 cycles. For patients who continue beyond 12 cycles, MRI or CT imaging may be changed to once every 4 cycles. Patients undergo tumor biopsy cycle 2 days 3-5. \> \> Computed Tomography: Undergo CT \> \> Core Biopsy: Undergo tumor biopsy \> \> Magnetic Resonance Imaging: Undergo MRI \> \> Olaparib: Given orally (PO) \> \> Temozolomide: Given PO
Number of Patients Experiencing Adverse Events
20 Participants

SECONDARY outcome

Timeframe: Time from first treatment with the study drug to the earliest of either disease progression or death from any cause, assessed up to 2 years

The Kaplan-Meier method will be used to evaluate time to event endpoints. Median PFS will be reported with a 95% confidence interval.

Outcome measures

Outcome data not reported

SECONDARY outcome

Timeframe: Up to 2 years

Will be measured by genomic alterations in HR components at baseline and deoxyribonucleic acid (DNA) repair protein RAD51 homolog (RAD51) foci formation. The two integrated assays are genomics for alterations in HR genes and RAD51 foci formation. Both of these assays report binary results. The rate of response will be compared between binary variables using the Fisher's exact test. The log-rank test will be used to compare PFS between binary variables. Additional results from whole exome sequencing and ribonucleic acid sequencing (RNAseq) analysis on study samples will be reported in a descriptive fashion.

Outcome measures

Outcome data not reported

SECONDARY outcome

Timeframe: Up to 2 years

Will be assessed by immunohistochemistry (ICH). Macro ribonucleic acid (mRNA) expression may also be performed. Expression are reported as a continuous variable. Logistic regression will be used to estimate the odds of response for every unit increase in protein expression. Cox-regression will be used to evaluate the association between PFS and protein expression. Graphical displays such as box plots and Kaplan-Meier plots will be used to visualize the data. Evaluate for any association between presence of HR deficiency and increased clinical benefit from study treatment.

Outcome measures

Outcome data not reported

SECONDARY outcome

Timeframe: Up to 2 years

Will be assessed by ICH. mRNA expression may also be performed. Expression are reported as a continuous variable. Logistic regression will be used to estimate the odds of response for every unit increase in protein expression. Cox-regression will be used to evaluate the association between PFS and protein expression. Graphical displays such as box plots and Kaplan-Meier plots will be used to visualize the data. Evaluate for any association between MGMT expression and increased clinical benefit from the study treatment.

Outcome measures

Outcome data not reported

Adverse Events

Treatment (Olaparib, Temozolomide)

Serious events: 19 serious events
Other events: 22 other events
Deaths: 8 deaths

Serious adverse events

Serious adverse events
Measure
Treatment (Olaparib, Temozolomide)
n=22 participants at risk
Temozolomide: Given PO
Gastrointestinal disorders
Abdominal pain
4.5%
1/22 • Number of events 1 • 34 months
Investigations
Activated partial thromboplastin time prolonged
4.5%
1/22 • Number of events 1 • 34 months
Renal and urinary disorders
Acute kidney injury
4.5%
1/22 • Number of events 1 • 34 months
Immune system disorders
Allergic reaction
4.5%
1/22 • Number of events 1 • 34 months
Cardiac disorders
Atrial fibrillation
4.5%
1/22 • Number of events 1 • 34 months
Gastrointestinal disorders
Diarrhea
4.5%
1/22 • Number of events 1 • 34 months
Renal and urinary disorders
HYDRONEPHROSIS
4.5%
1/22 • Number of events 1 • 34 months
Vascular disorders
Hematoma
4.5%
1/22 • Number of events 1 • 34 months
Renal and urinary disorders
Hematuria
4.5%
1/22 • Number of events 1 • 34 months
Vascular disorders
Hypotension
4.5%
1/22 • Number of events 1 • 34 months
Investigations
Lymphocyte count decreased
9.1%
2/22 • Number of events 4 • 34 months
Investigations
Neutrophil count decreased
72.7%
16/22 • Number of events 28 • 34 months
Investigations
Platelet count decreased
31.8%
7/22 • Number of events 12 • 34 months
Cardiac disorders
Sinus tachycardia
4.5%
1/22 • Number of events 1 • 34 months
Investigations
White blood cell decreased
22.7%
5/22 • Number of events 9 • 34 months

Other adverse events

Other adverse events
Measure
Treatment (Olaparib, Temozolomide)
n=22 participants at risk
Temozolomide: Given PO
Metabolism and nutrition disorders
Hyponatremia
13.6%
3/22 • Number of events 7 • 34 months
Metabolism and nutrition disorders
Hypophosphatemia
9.1%
2/22 • Number of events 5 • 34 months
Investigations
INR increased
9.1%
2/22 • Number of events 13 • 34 months
Injury, poisoning and procedural complications
Infusion related reaction
4.5%
1/22 • Number of events 1 • 34 months
Psychiatric disorders
Insomnia
18.2%
4/22 • Number of events 49 • 34 months
Eye disorders
L eye irritation
4.5%
1/22 • Number of events 14 • 34 months
Investigations
Lymphocyte count decreased
31.8%
7/22 • Number of events 44 • 34 months
General disorders
Malaise
4.5%
1/22 • Number of events 1 • 34 months
Nervous system disorders
Memory impairment
4.5%
1/22 • Number of events 16 • 34 months
Gastrointestinal disorders
Mucositis oral
4.5%
1/22 • Number of events 13 • 34 months
Nervous system disorders
Muscle weakness left-sided
4.5%
1/22 • Number of events 9 • 34 months
Nervous system disorders
Muscle weakness right-sided
4.5%
1/22 • Number of events 9 • 34 months
Musculoskeletal and connective tissue disorders
Muscle weakness upper limb
4.5%
1/22 • Number of events 4 • 34 months
Musculoskeletal and connective tissue disorders
Myalgia
4.5%
1/22 • Number of events 16 • 34 months
Infections and infestations
Nail infection
4.5%
1/22 • Number of events 2 • 34 months
Respiratory, thoracic and mediastinal disorders
Nasal congestion
9.1%
2/22 • Number of events 10 • 34 months
Gastrointestinal disorders
Nausea
54.5%
12/22 • Number of events 121 • 34 months
Investigations
Neutrophil count decreased
81.8%
18/22 • Number of events 166 • 34 months
Gastrointestinal disorders
Oral hemorrhage
9.1%
2/22 • Number of events 3 • 34 months
Gastrointestinal disorders
Oral pain
18.2%
4/22 • Number of events 25 • 34 months
General disorders
Pain
18.2%
4/22 • Number of events 27 • 34 months
Musculoskeletal and connective tissue disorders
Pain in extremity
22.7%
5/22 • Number of events 22 • 34 months
Nervous system disorders
Paresthesia
9.1%
2/22 • Number of events 32 • 34 months
Reproductive system and breast disorders
Pelvic pain
4.5%
1/22 • Number of events 9 • 34 months
Gastrointestinal disorders
Periodontal disease
4.5%
1/22 • Number of events 10 • 34 months
Nervous system disorders
Peripheral motor neuropathy
4.5%
1/22 • Number of events 1 • 34 months
Nervous system disorders
Peripheral sensory neuropathy
4.5%
1/22 • Number of events 5 • 34 months
Investigations
Platelet count decreased
86.4%
19/22 • Number of events 185 • 34 months
Respiratory, thoracic and mediastinal disorders
Pleural effusion
4.5%
1/22 • Number of events 2 • 34 months
Skin and subcutaneous tissue disorders
Pruritus
4.5%
1/22 • Number of events 1 • 34 months
Skin and subcutaneous tissue disorders
Rash maculo-papular
18.2%
4/22 • Number of events 13 • 34 months
Gastrointestinal disorders
Rectal hemorrhage
9.1%
2/22 • Number of events 4 • 34 months
Cardiac disorders
Sinus bradycardia
4.5%
1/22 • Number of events 3 • 34 months
Respiratory, thoracic and mediastinal disorders
Sinus disorder
4.5%
1/22 • Number of events 18 • 34 months
Cardiac disorders
Sinus tachycardia
13.6%
3/22 • Number of events 9 • 34 months
Respiratory, thoracic and mediastinal disorders
Sore throat
9.1%
2/22 • Number of events 2 • 34 months
Gastrointestinal disorders
Stomach Gas
4.5%
1/22 • Number of events 2 • 34 months
Gastrointestinal disorders
Stomach pain
4.5%
1/22 • Number of events 1 • 34 months
Ear and labyrinth disorders
Tinnitus
4.5%
1/22 • Number of events 5 • 34 months
Gastrointestinal disorders
Toothache
4.5%
1/22 • Number of events 2 • 34 months
Infections and infestations
Upper respiratory infection
9.1%
2/22 • Number of events 3 • 34 months
Infections and infestations
Urinary tract infection
9.1%
2/22 • Number of events 3 • 34 months
Renal and urinary disorders
Urinary urgency
4.5%
1/22 • Number of events 2 • 34 months
Skin and subcutaneous tissue disorders
Urticaria
4.5%
1/22 • Number of events 1 • 34 months
Reproductive system and breast disorders
Vaginal discharge
4.5%
1/22 • Number of events 3 • 34 months
Infections and infestations
Vaginal infection
4.5%
1/22 • Number of events 1 • 34 months
Gastrointestinal disorders
Vomiting
31.8%
7/22 • Number of events 22 • 34 months
Investigations
Weight gain
13.6%
3/22 • Number of events 26 • 34 months
Investigations
Weight loss
9.1%
2/22 • Number of events 13 • 34 months
Investigations
White blood cell decreased
77.3%
17/22 • Number of events 190 • 34 months
Skin and subcutaneous tissue disorders
nail ridges peeling
4.5%
1/22 • Number of events 11 • 34 months
General disorders
pinching pain near vagina (left side)
4.5%
1/22 • Number of events 1 • 34 months
Reproductive system and breast disorders
small warty lesion on left labia
4.5%
1/22 • Number of events 8 • 34 months
General disorders
Edema limbs
27.3%
6/22 • Number of events 38 • 34 months
General disorders
Fatigue
63.6%
14/22 • Number of events 160 • 34 months
General disorders
Fever
22.7%
5/22 • Number of events 7 • 34 months
Musculoskeletal and connective tissue disorders
Flank pain
4.5%
1/22 • Number of events 2 • 34 months
Gastrointestinal disorders
Flatulence
4.5%
1/22 • Number of events 3 • 34 months
General disorders
Flu like symptoms
4.5%
1/22 • Number of events 1 • 34 months
Vascular disorders
Flushing
4.5%
1/22 • Number of events 1 • 34 months
General disorders
Fogginess feeling
4.5%
1/22 • Number of events 2 • 34 months
Investigations
GGT increased
9.1%
2/22 • Number of events 10 • 34 months
General disorders
Gait disturbance
4.5%
1/22 • Number of events 1 • 34 months
Gastrointestinal disorders
Gastroesophageal reflux disease
18.2%
4/22 • Number of events 48 • 34 months
Renal and urinary disorders
HYDRONEPHROSIS
4.5%
1/22 • Number of events 11 • 34 months
Skin and subcutaneous tissue disorders
Hair texture abnormal
4.5%
1/22 • Number of events 1 • 34 months
Nervous system disorders
Headache
22.7%
5/22 • Number of events 37 • 34 months
Blood and lymphatic system disorders
Hemoglobin decrease
4.5%
1/22 • Number of events 2 • 34 months
Gastrointestinal disorders
Hemorrhoidal hemorrhage
4.5%
1/22 • Number of events 1 • 34 months
Infections and infestations
Herpes simplex reactivation
9.1%
2/22 • Number of events 2 • 34 months
Vascular disorders
Hot flashes
18.2%
4/22 • Number of events 15 • 34 months
Renal and urinary disorders
Hydronephrosis
4.5%
1/22 • Number of events 1 • 34 months
Metabolism and nutrition disorders
Hypercalcemia
4.5%
1/22 • Number of events 4 • 34 months
Metabolism and nutrition disorders
Hyperglycemia
54.5%
12/22 • Number of events 55 • 34 months
Metabolism and nutrition disorders
Hypernatremia
4.5%
1/22 • Number of events 2 • 34 months
Metabolism and nutrition disorders
Hyperphosphatemia
4.5%
1/22 • Number of events 5 • 34 months
Vascular disorders
Hypertension
27.3%
6/22 • Number of events 22 • 34 months
Metabolism and nutrition disorders
Hypertriglyceridemia
4.5%
1/22 • Number of events 15 • 34 months
Metabolism and nutrition disorders
Hypoalbuminemia
13.6%
3/22 • Number of events 9 • 34 months
Metabolism and nutrition disorders
Hypocalcemia
9.1%
2/22 • Number of events 5 • 34 months
Metabolism and nutrition disorders
Hypokalemia
18.2%
4/22 • Number of events 7 • 34 months
Gastrointestinal disorders
Abdominal pain
27.3%
6/22 • Number of events 26 • 34 months
Gastrointestinal disorders
Abdominal tenderness near umbilicus
4.5%
1/22 • Number of events 4 • 34 months
Investigations
Activated partial thromboplastin time prolonged
4.5%
1/22 • Number of events 8 • 34 months
Investigations
Alanine aminotransferase increased
9.1%
2/22 • Number of events 7 • 34 months
Investigations
Alkaline phosphatase increased
22.7%
5/22 • Number of events 24 • 34 months
Respiratory, thoracic and mediastinal disorders
Allergic rhinitis
4.5%
1/22 • Number of events 17 • 34 months
Skin and subcutaneous tissue disorders
Alopecia
4.5%
1/22 • Number of events 21 • 34 months
Gastrointestinal disorders
Anal fissure
4.5%
1/22 • Number of events 18 • 34 months
Blood and lymphatic system disorders
Anemia
72.7%
16/22 • Number of events 188 • 34 months
Metabolism and nutrition disorders
Anorexia
27.3%
6/22 • Number of events 22 • 34 months
Psychiatric disorders
Anxiety
4.5%
1/22 • Number of events 21 • 34 months
Musculoskeletal and connective tissue disorders
Arthralgia
9.1%
2/22 • Number of events 36 • 34 months
Investigations
Aspartate aminotransferase increased
9.1%
2/22 • Number of events 5 • 34 months
Musculoskeletal and connective tissue disorders
Back pain
22.7%
5/22 • Number of events 45 • 34 months
Eye disorders
Blepharospasm (left eye)
4.5%
1/22 • Number of events 4 • 34 months
Investigations
Blood bicarbonate decreased
4.5%
1/22 • Number of events 2 • 34 months
Investigations
Blood lactate dehydrogenase increased
13.6%
3/22 • Number of events 16 • 34 months
Eye disorders
Blurred vision
4.5%
1/22 • Number of events 14 • 34 months
Musculoskeletal and connective tissue disorders
Bone pain
4.5%
1/22 • Number of events 19 • 34 months
Reproductive system and breast disorders
Breast pain
4.5%
1/22 • Number of events 2 • 34 months
Infections and infestations
COVID-19
4.5%
1/22 • Number of events 1 • 34 months
Respiratory, thoracic and mediastinal disorders
Chest congestion
4.5%
1/22 • Number of events 1 • 34 months
General disorders
Chills
9.1%
2/22 • Number of events 2 • 34 months
General disorders
Cold flashes
4.5%
1/22 • Number of events 2 • 34 months
General disorders
Cold flashes, intermittent
4.5%
1/22 • Number of events 11 • 34 months
Gastrointestinal disorders
Colitis
4.5%
1/22 • Number of events 1 • 34 months
Psychiatric disorders
Confusion
4.5%
1/22 • Number of events 1 • 34 months
Gastrointestinal disorders
Constipation
40.9%
9/22 • Number of events 61 • 34 months
Respiratory, thoracic and mediastinal disorders
Cough
18.2%
4/22 • Number of events 7 • 34 months
Investigations
Creatinine increased
18.2%
4/22 • Number of events 7 • 34 months
Metabolism and nutrition disorders
Dehydration
4.5%
1/22 • Number of events 1 • 34 months
Psychiatric disorders
Depression
9.1%
2/22 • Number of events 4 • 34 months
Gastrointestinal disorders
Diarrhea
40.9%
9/22 • Number of events 42 • 34 months
Nervous system disorders
Dizziness
22.7%
5/22 • Number of events 31 • 34 months
Gastrointestinal disorders
Dry mouth
9.1%
2/22 • Number of events 32 • 34 months
Skin and subcutaneous tissue disorders
Dry skin
18.2%
4/22 • Number of events 26 • 34 months
Nervous system disorders
Dysgeusia
13.6%
3/22 • Number of events 17 • 34 months
Respiratory, thoracic and mediastinal disorders
Dyspnea
22.7%
5/22 • Number of events 36 • 34 months
Renal and urinary disorders
Dysuria
4.5%
1/22 • Number of events 3 • 34 months
General disorders
Edema face
4.5%
1/22 • Number of events 1 • 34 months

Additional Information

Matthew Ingham, MD

Columbia University Medical Center

Phone: 646-317-7141

Results disclosure agreements

  • Principal investigator is a sponsor employee
  • Publication restrictions are in place

Restriction type: LTE60