Long-term niraparib treatment for people who completed a prior GSK/TESARO niraparib protocol
Official title: An Open-Label, Multicenter, Long-term Treatment Extension Study in Subjects Who Have Completed a Prior GlaxoSmithKline/TESARO-Sponsored Niraparib Study and Are Judged by the Investigator to Benefit From Continued Treatment With Niraparib
Run by GlaxoSmithKline · NCT04641247 · Data updated 2026-11-12
This extension lets people with ovarian or breast cancer who finished a GSK/TESARO niraparib protocol keep taking niraparib to see if it remains safe over the long term.
Quick facts
| Phase | Phase 2 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 37 (estimated) |
| Sponsor | GlaxoSmithKline Industry-sponsored |
| Locations | 25 sites (Tucson, Arizona and 24 other locations) |
| Status | Recruiting |
| Started | April 16, 2021 |
| Main results expected | December 28, 2026 |
| Study ends | December 28, 2026 |
| Registry record updated | June 24, 2026 |
| Trial ID | NCT04641247 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates are adults with ovarian or breast cancer currently receiving niraparib in a GlaxoSmithKline/TESARO-sponsored parent protocol who are judged by their investigator to be benefiting from treatment and who can meet consent and contraception requirements.
✕Probably not a fit
Patients who were permanently discontinued from niraparib in the parent protocol, who are not benefiting from niraparib, or who did not participate in a qualifying GSK/TESARO parent protocol are unlikely to receive benefit from this extension.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This open-label extension provides continued access to niraparib for participants who completed a GSK/TESARO-sponsored parent protocol and are still receiving benefit. Participants who meet entry requirements continue on niraparib and are followed for long-term safety and adverse events. The study enrolls adults previously treated with niraparib (monotherapy or combination) and requires informed consent and contraception use for those of childbearing potential. Data collected will characterize tolerability and safety signals with extended exposure to niraparib.
Why it matters
Potential benefit: If successful, participants may continue a therapy that is helping them while the study yields important data on the long-term safety of niraparib.
How similar studies have gone: PARP inhibitors including niraparib have demonstrated clinical benefit in ovarian cancer and extension programs have previously been used to monitor long-term safety, so this approach builds on established clinical experience.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Participant is able to understand the study procedures and agrees to participate in the study by providing written informed consent. * Participant is willing and able to comply with scheduled visits, treatment plans, and any other study procedures. * Participant is currently receiving treatment with niraparib (as monotherapy or in combination) in a GlaxoSmithKline/TESARO-sponsored study that has fulfilled the requirements for the primary objective. * Participant is currently benefiting from treatment with niraparib as assessed by the Investigator according to the parent study protocol requirements. * Participants of childbearing potential who are sexually active and their partners must agree to the use of an effective form of contraception throughout their participation during study treatment through 180 days after last dose of study drug. Exclusion Criteria: * Participant has been permanently discontinued from niraparib treatment in the parent study for any reason. * Participant currently has unresolved toxicities for which niraparib dosing has been interrupted in the parent study. Participants meeting all other eligibility criteria may be enrolled once toxicities have resolved to allow niraparib treatment to resume. * Participant is pregnant or is expecting to conceive children while receiving study drug or for up to 180 days after the last dose of study drug. Participant is breastfeeding or is expecting to breastfeed within 30 days of receiving the final dose of study drug (women should not breastfeed or store breastmilk for use during niraparib treatment and for 30 days after receiving the final dose of study treatment).
Where it's running
-
GSK Investigational Site
Encinitas, California, United States Recruiting -
GSK Investigational Site
Los Angeles, California, United States Recruiting -
GSK Investigational Site
Atlanta, Georgia, United States Recruiting -
GSK Investigational Site
Harvey, Illinois, United States Recruiting -
GSK Investigational Site
Boston, Massachusetts, United States Recruiting -
GSK Investigational Site
Grand Rapids, Michigan, United States Recruiting
Show 19 more locations
-
GSK Investigational Site
Morristown, New Jersey, United States Recruiting -
GSK Investigational Site
Lake Success, New York, United States Recruiting -
GSK Investigational Site
Charlotte, North Carolina, United States Recruiting -
GSK Investigational Site
Graz, Austria Recruiting -
GSK Investigational Site
Vienna, Austria Recruiting -
GSK Investigational Site
Kelowna, British Columbia, Canada Recruiting -
GSK Investigational Site
Toronto, Ontario, Canada Recruiting -
GSK Investigational Site
Montreal, Quebec, Canada Recruiting -
GSK Investigational Site
Haifa, Israel Recruiting -
GSK Investigational Site
Cremona, Italy Recruiting -
GSK Investigational Site
Madrid, Spain Recruiting -
GSK Investigational Site
Madrid, Spain Recruiting -
GSK Investigational Site
Tucson, Arizona, United States Completed -
GSK Investigational Site
Whittier, California, United States Completed -
GSK Investigational Site
Jacksonville, Florida, United States Completed -
GSK Investigational Site
Cleveland, Ohio, United States Completed -
GSK Investigational Site
Odense C, Denmark Completed -
GSK Investigational Site
Nantes, France Completed -
GSK Investigational Site
Nice, France Completed
Study contacts
- Study coordinator: US GSK Clinical Trials Call Center
- Email: GSKClinicalSupportHD@gsk.com
- Phone: 877-379-3718
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
-
LY4337713 for people with FAP-positive ovarian, breast, pancreatic, colorectal, or esophageal cancers
This trial tests LY4337713, a FAP-targeted lutetium-177 therapy, in people with advanced cancers that show high levels of fibroblast activation protein (FAP).
-
Creating a bank of tumor tissue samples for research
This study is creating a collection of tumor tissue samples from cancer patients and healthy individuals to help researchers find better ways to diagnose and treat cancer.
-
Creating a tumor bank for blood samples from cancer patients and healthy controls
This study is collecting blood samples from cancer patients and healthy people to help researchers find better ways to diagnose and treat cancer.
-
Improved Facial Skin Quality After VYC-12L for Breast Cancer Survivors
This study tests whether intradermal injections of VYC-12L can improve facial skin quality and quality of life in adults who have completed breast cancer treatment.
-
Breast cancer subtypes and outcomes in Colombian women
This study looks back at medical records of women with breast cancer to see how different molecular subtypes relate to survival and recurrence in a single Colombian hospital.
-
Raludotatug Deruxtecan With or Without Bevacizumab as First‑Line Maintenance in Advanced Ovarian Cancer
This trial tests whether maintenance therapy with raludotatug deruxtecan, with or without bevacizumab, helps people with advanced ovarian, fallopian tube, or primary peritoneal cancer live longer without the cancer growing after initial treatment.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.