A Study of Serum Folate Levels in Patients Treated With Olaparib

February 18, 2026 updated by: Lydia Usha, Rush University Medical Center

A Study of Serum Folate Levels in Patients With Treated With Olaparib.

This is a study investigating folate deficiency (lack of folic acid in the blood) in patients who take the drug olaparib to treat their advanced ovarian or breast cancer.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

This is a study investigating folate deficiency (lack of folic acid in the blood) in patients who take the drug olaparib to treat their advanced ovarian or breast cancer. The primary goal of this study is to determine the frequency and timing of folate deficiency, and to learn more about whether giving folic acid supplementation (vitamin) will help delay or avoid deficiency in these patients. Deficiency can cause doctors to reduce or stop treatment with olaparib. In this case, patients are not getting the best treatment for their cancer due to the unwanted side effect.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
10

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 4

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Illinois
      • Chicago, Illinois, United States, 60612
        • Rush University Medical Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Willing and able to provide signed informed consent
  • Female, post-menopausal, ≥18 years of age inclusive, at the time of signing the consent form
  • Individuals who have ovarian cancer or breast cancer who are recommended to start olaparib
  • Patients must have normal organ and bone marrow function measured within 28 days prior to administration of study treatment as defined below:
  • Haemoglobin ≥ 9 g/dL with no blood transfusion in the past 28 days
  • Absolute neutrophil count (ANC) ≥ 1.5 x 109/L
  • Platelet count ≥ 100 x 109/L
  • Total bilirubin ≤ 1.5 x institutional upper limit of normal (ULN)
  • Aspartate aminotransferase (AST) (Serum Glutamic Oxaloacetic Transaminase (SGOT)) / Alanine aminotransferase (ALT) (Serum Glutamic Pyruvate Transaminase (SGPT)) ≤ 2.5 x institutional upper limit of normal unless liver metastases are present in which case they must be ≤ 5x ULN
  • Patients must have creatinine clearance estimated of ≥51 mL/min
  • Eastern Cooperative Oncology Group (ECOG) performance status 0-1).
  • Patients must have a life expectancy ≥ 16 weeks.
  • At least one lesion (measurable and/or non-measurable) that can be accurately assessed at baseline by CT and is suitable for repeated assessment.

Exclusion Criteria:

  • Patients with folic acid deficiency, defined as folate <7 ng/mL, or those taking folic acid supplementation within 30 days of olaparib initiation.
  • Other malignancy unless curatively treated with no evidence of disease for ≥5 years except: adequately treated non-melanoma skin cancer, curatively treated in situ cancer of the cervix, ductal carcinoma in situ (DCIS), Stage 1, grade 1 endometrial carcinoma. Patients with a history of localised triple negative breast cancer may be eligible, provided they completed their adjuvant chemotherapy more than three years prior to registration, and that the patient remains free of recurrent or metastatic disease
  • Resting ECG indicating uncontrolled, potentially reversible cardiac conditions, as judged by the investigator (e.g., unstable ischemia, uncontrolled symptomatic arrhythmia, congestive heart failure, QTcF prolongation >500 ms, electrolyte disturbances, etc.), or patients with congenital long QT syndrome.
  • Persistent toxicities (>Common Terminology Criteria for Adverse Event (CTCAE) grade 2) caused by previous cancer therapy, excluding alopecia.
  • Patients with myelodysplastic syndrome/acute myeloid leukaemia or with features suggestive of MDS/AML.
  • Patients with symptomatic uncontrolled brain metastases.
  • Patients considered a poor medical risk due to a serious, uncontrolled medical disorder, non-malignant systemic disease or active, uncontrolled infection.
  • Patients unable to swallow orally administered medication and patients with gastrointestinal disorders likely to interfere with absorption of the study medication.
  • Immunocompromised patients, e.g., patients who are known to be serologically positive for human immunodeficiency virus (HIV).
  • Patients with known active hepatitis (i.e. Hepatitis B or C).
  • Any previous treatment with PARP inhibitor, including Olaparib.
  • Patients receiving any systemic chemotherapy or radiotherapy (except for palliative reasons) within 3 weeks prior to study treatment
  • Concomitant use of known strong CYP3A inhibitors (e.g., itraconazole, telithromycin, clarithromycin, protease inhibitors boosted with ritonavir or cobicistat, indinavir, saquinavir, nelfinavir, boceprevir, telaprevir) or moderate CYP3A inhibitors (e.g., ciprofloxacin, erythromycin, diltiazem, fluconazole, verapamil). The required washout period prior to starting olaparib is 2 weeks.
  • Concomitant use of known strong (e.g., phenobarbital, enzalutamide, phenytoin, rifampicin, rifabutin, rifapentine, carbamazepine, nevirapine and St John's Wort) or moderate CYP3A inducers (e.g., bosentan, efavirenz, modafinil). The required washout period prior to starting olaparib is 5 weeks for enzalutamide or phenobarbital and 3 weeks for other agents.
  • Major surgery within 2 weeks of starting study treatment and patients must have recovered from any effects of any major surgery.
  • Previous allogenic bone marrow transplant or double umbilical cord blood transplantation (dUCBT).
  • Whole blood transfusions in the last 120 days prior to entry to the study (packed red blood cells and platelet transfusions are acceptable).
  • Participation in another clinical study with an investigational product administered in the last 1 month
  • Patients with a known hypersensitivity to olaparib or any of the excipients of the product.
  • Patients with a known hypersensitivity to folic acid or any of the excipients of the product.
  • Involvement in the planning and/or conduct of the study
  • Judgment by the investigator that the patient should not participate in the study if the patient is unlikely to comply with study procedures, restrictions and requirements
  • Previous enrollment in the present study
  • Breast feeding women

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Folic Acid supplementation
Folic Acid supplement 1 mg by mouth daily
Drug: Folic Acid Tablet
Folic Acid 1 mg by mouth daily
No Intervention: No Folic Acid Supplementation
No Folic Acid supplementation.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Number of Participants Who Have Developed Folate Deficiency (Serum Folate Level < 7 ng/ml) on Olaparib
Time Frame: Serum folate levels were measured in each enrolled subject: at baseline, then every 2 weeks X 3 months, then monthly X 9 months. Accrual occurred over a 2-year period.
The number of patients with ovarian and breast cancers who were treated with olaparib and developed folate deficiency was counted.
Serum folate levels were measured in each enrolled subject: at baseline, then every 2 weeks X 3 months, then monthly X 9 months. Accrual occurred over a 2-year period.
Timing of Folate Deficiency Development
Time Frame: From the beginning of olaparib treatment until the development of folate deficiency
The number of weeks between the beginning of olaparib treatment and the development of folate deficiency
From the beginning of olaparib treatment until the development of folate deficiency

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
The Number of Participants Who Developed Decreased Hemoglobin by ≥ 1 g/dl Relative to Baseline
Time Frame: Hemoglobin levels were measured in each enrolled subject: at baseline, then every 2 weeks X 3 months, then monthly X 9 months. Accrual occurred over a 2-year period.
To evaluate the effect of olaparib on hemoglobin level in both arms of the study as compared to baseline before the beginning of the olaparib treatment
Hemoglobin levels were measured in each enrolled subject: at baseline, then every 2 weeks X 3 months, then monthly X 9 months. Accrual occurred over a 2-year period.
Serum Folate
Time Frame: Serum folate levels were measured in each enrolled subject: at baseline, then every 2 weeks X 3 months, then monthly X 9 months. Accrual occurred over a 2-year period.
To evaluate the effect of folic acid supplementation on serum folate levels as compared to the no Folate supplementation arm. Serum folate was measured every 2 weeks for the first 3 months, and then monthly for 9 months during olaparib therapy.
Serum folate levels were measured in each enrolled subject: at baseline, then every 2 weeks X 3 months, then monthly X 9 months. Accrual occurred over a 2-year period.
Number of Participants Requiring Blood Transfusions
Time Frame: Over 12 months while on olaparib therapy.
The number of patients requiring blood transfusions during olaparib treatment was counted.
Over 12 months while on olaparib therapy.
Number of Participants Requiring Olaparib Dose Interruptions
Time Frame: Over 12 months while on olaparib therapy.
The number of subjects requiring interruptions in olaparib treatment for any reason was counted.
Over 12 months while on olaparib therapy.
Number of Participants Requiring Olaparib Dose Reductions for Any Reason
Time Frame: Over 12 months while on olaparib therapy.
The number of participants requiring olaparib dose reductions for any reason was counted.
Over 12 months while on olaparib therapy.
Number of Participants Requiring Olaparib Discontinuation
Time Frame: Over 12 months while on olaparib therapy
The number of subjects who had their olaparib treatment discontinued was counted.
Over 12 months while on olaparib therapy

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Rush University Medical Center

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Lydia Usha, MD, Rush University Medical Center

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
July 21, 2020

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
December 31, 2025

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 31, 2025

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
July 10, 2019

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 16, 2019

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
July 18, 2019

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
March 4, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
February 18, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
February 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 18070604

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

Yes

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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