WithdrawnPhase 2

Study Evaluating Pembrolizumab +/- Olaparib in TLS Positive Selected Resectable STS Followed by Adjuvant Pembrolizumab

Stopped: Abandon of the study by the partenair (MSD)

France0Started 2025-01-01

Plain-language summary

Soft tissue sarcomas represent a subtype of cancer that is both rare and very heterogeneous. When they are organized, their current treatment is essentially based on tumor resection surgery, +/- associated with treatment by chemotherapy and/or radiotherapy. The aim of this treatment is to reduce the risk of local recurrence (appearance of a tumor in the same region where it was first detected) and/or distant (appearance of a tumor in other regions, organs where it was first detected). Currently, no immunotherapy treatment has been approved for the treatment of patients with sarcoma. This research is based on the hypothesis that soft tissue sarcomas in which "tertiary lymphoid structures" or "TLS" are found, recognizable by a cluster of specific immune cells within the tumor, would be likely to respond better to the immunotherapy. Furthermore, the combination of immunotherapy and certain drugs targeting DNA repair has demonstrated some effectiveness in other types of cancers. Trial population :Adult patients with suspected / diagnosed soft tissue sarcoma of the extremities or trunk (Cohort 1: Undifferentiated pleomorphic sarcoma / Cohort 2: Dedifferentiated liposarcoma) The research will therefore focus on two experimental drugs : * Pembrolizumab (immunotherapy) and * Olaparib (DNA repair inhibitor). This research will make it possible to evaluate the effectiveness and safety of use of the two drugs.

Who can participate

Age range

18 Years

Sex

ALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion criteria

. Not a woman of childbearing potential (WOCBP) OR
. A WOCBP who agrees to follow the contraceptive guidance during the treatment period and for 120 to 180 days (corresponding to time needed to eliminate any study treatment(s) plus the duration of a menstruation cycle: 120 days for pembrolizumab and/or 180 days for olaparib) after the last dose of study treatment.

Questions worth asking your doctor

Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.

1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?

Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.

Questions for the trial coordinator

The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.

1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?

A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.

What they're measuring

Rate of CD8+ T-cell tumor infiltration density at surgery compare to baseline

Timeframe: 1 year after the end of inclusions

Trial details

NCT IDNCT06116578

SponsorGustave Roussy, Cancer Campus, Grand Paris

Sponsor typeOTHER

Study typeINTERVENTIONAL

Primary completion2027-07

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