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RecruitingNCT07108270Updated Dec 22, 2025

A Study of Dostarlimab in Combination With Carboplatin-paclitaxel in Chinese Participants With Primary Advanced or Recurrent Endometrial Cancer (EC)

A Phase 2 interventional study of Dostarlimab and Carboplatin in Neoplasms, Endometrial, sponsored by GlaxoSmithKline. Recruiting at 1 site in China. Open to female participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2025-12-22.

Sponsored by GlaxoSmithKline · Phase 2, Interventional, and Treatment

From the registry’s dates

  • Started Nov 2025; still recruiting 10 months later.
Phase
Phase 2
Study type
Interventional
Enrollment
30
Allocation
Not applicable
Ages
18 Years and older
Sex
Female
01

Study summary

The goal of this clinical trial is to see how well dostarlimab works when administered with the chemotherapy drugs carboplatin and paclitaxelin in treating EC in Chinese participants. The study aims to understand the treatments effectiveness, safety, how the drugs behave in the body, and whether it causes any immune reactions.

02

Conditions studied

  • Neoplasms, Endometrial

Keywords

  • Endometrial cancer
  • Dostarlimab
  • Carboplatin
  • Paclitaxel
03

In context

Endometrial Neoplasms

1,325 studies on the registry are indexed under Endometrial Neoplasms; 447 are open to participants now.

This study's planned enrollment of 30 is below the median of 70 across 941 interventional studies indexed under Endometrial Neoplasms.

Browse Endometrial Neoplasms studies →

Lead sponsor

GlaxoSmithKline is the lead sponsor of 3,562 studies on the registry; 117 are open to participants now.

Of its 258 completed or terminated interventional studies of FDA-regulated products, 232 (90%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
Female
Accepts healthy volunteers
No

Inclusion criteria

  1. Participant has histologically or cytologically proven EC with recurrent or advanced disease.
  2. Participant has molecular subtype of defective mismatch repair (dMMR) or microsatellite instability high (MSI-H) determined by the central reference laboratory before study intervention.
  3. Participant must have primary Stage III or Stage IV disease or first recurrent EC with a low potential for cure by radiation therapy or surgery alone or in combination, and presence of at least one target lesion per RECIST 1.1 based on Investigator's assessment and meet at least 1 of the following criteria:

    1. Has primary Stage III to IV disease and is naive to systemic anticancer therapy for EC;
    2. Has first recurrent disease and is naïve to systemic anticancer therapy for EC;
    3. Had received prior neo-adjuvant/adjuvant anticancer therapy and had a recurrence or PD ≥6 months after completing treatment (first recurrence only).
  4. Participant has adequate archive tumor tissue sample for MMR/MSI status testing. If no archival tissue is available, tissue sample must be obtained before study intervention.
  5. Participant is not pregnant or breastfeeding and agrees to use a highly effective contraceptive method during the study period if a woman of childbearing potential (WOCBP).
  6. Participant has an Eastern Cooperative Oncology Group Performance status (ECOG PS) of 0 or 1.
  7. Participant has adequate organ function, as assessed by hematologic, renal, hepatic and coagulation parameters.

Exclusion criteria

Exclusion Criteria:

  1. Participant has a concomitant malignancy, or participant has a prior non-endometrial invasive malignancy who has been disease-free for \<3 years or who received any active treatment in the last 3 years for that malignancy. Non-melanoma skin cancer is allowed.
  2. Participant has any medical history of interstitial lung disease or pneumonitis.
  3. Participant has cirrhosis or current unstable liver or biliary disease.
  4. Participant has known uncontrolled central nervous system metastases, carcinomatosis meningitis, or both.
  5. Participant has a diagnosis of immunodeficiency.
  6. Participant has received prior therapy with an anti- Programmed death protein 1 (PD-1), anti- Programmed death ligand 1 (PD-L1), anti- Programmed death ligand 2 (PD-L2), or anti- Cytotoxic T-lymphocyte-associated protein 4 (CTLA-4) agent.
  7. Participant has not recovered adequately from AEs.
  8. Participant has received prior anticancer therapy (chemotherapy, targeted therapies, hormonal therapy, radiotherapy, or immunotherapy) within 21 days prior to the first dose of study intervention.
  9. Participant has received any live vaccine within 30 days of the first dose of study intervention. Vaccination against coronavirus disease 2019 (COVID-19) using vaccines that are authorized via the appropriate regulatory mechanisms are not exclusionary.
  10. Participant has Hepatitis B surface antigen (HBsAg) positive, or Hepatitis C virus (HCV) Ribonucleic acid (RNA) positive at screening or within 3 months prior to the first dose of study intervention.
  11. Participant is known human immunodeficiency virus (HIV) infection.
  12. Participant is currently participating and receiving study intervention or has participated in a study of an investigational agent and received study intervention or used an investigational device within 4 weeks of the first dose of treatment.
  13. Participant with contraindication to carboplatin and paclitaxel.
05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
30 participants (estimated)

Study arms

  • Experimental
    Dostarlimab-Carboplatin-Paclitaxel followed by Dostarlimab Monotherapy

    Biological: Dostarlimab · Drug: Carboplatin · Drug: Paclitaxel

Interventions

  • BiologicalDostarlimab

    Dostarlimab will be administered.

  • DrugCarboplatin

    Carboplatin will be administered.

  • DrugPaclitaxel

    Paclitaxel will be administered.

06

What researchers measure

Primary outcomes

  1. Durable Response Rate for 12 months (DRR12) assessed by Blinded Independent Central Review (BICR)

    DRR12 is defined as the proportion of participants with confirmed Complete Response (CR) or Partial Response (PR), and Duration of Response (DOR) lasting greater than or equal to (≥) 12 months, per Response Evaluation Criteria in Solid Tumors, version 1.1 (RECIST 1.1).

    Time frame: Up to approximately 148 weeks

Secondary outcomes

  1. DRR12 assessed by Investigator

    DRR12 is defined as the proportion of participants with confirmed Complete Response (CR) or Partial Response (PR), and Duration of Response (DOR) lasting greater than or equal to (≥) 12 months, per RECIST 1.1.

    Time frame: Up to approximately 148 weeks

  2. Progression-free survival (PFS) per RECIST 1.1, assessed by BICR

    PFS is defined as the time from the date of first dose to the date of first documented disease progression (PD) or death due to any cause, whichever comes first.

    Time frame: Up to 226 weeks

  3. Progression-free survival (PFS) per RECIST 1.1, assessed by investigator

    PFS is defined as the time from the date of first dose to the date of first documented PD or death due to any cause, whichever comes first.

    Time frame: Up to 226 weeks

  4. Overall survival (OS)

    OS is defined as time from first dose of study intervention to death from any cause.

    Time frame: Up to 226 weeks

  5. Overall response rate (ORR) per RECIST 1.1 assessed by BICR

    ORR is defined as the proportion of participants with confirmed CR or PR.

    Time frame: Up to 226 weeks

  6. ORR per RECIST 1.1 assessed by Investigator

    ORR is defined as the proportion of participants with confirmed CR or PR.

    Time frame: Up to 226 weeks

  7. Duration of response (DOR) per RECIST 1.1 assessed by BICR

    DOR is defined as the time from the date of first documented objective response (confirmed CR or PR) to the date of first documented PD or death due to any cause, whichever comes first.

    Time frame: Up to 226 weeks

  8. DOR per RECIST 1.1 assessed by Investigator

    DOR is defined as the time from the date of first documented objective response (confirmed CR or PR) to the date of first documented PD or death due to any cause, whichever comes first.

    Time frame: Up to 226 weeks

  9. Serum concentration of dostarlimab

    Time frame: Up to 67 weeks

  10. Concentration at the end of infusion (C-EOI) for dostarlimab

    Time frame: Up to 67 weeks

  11. Trough concentration (Ctrough) for dostarlimab

    Time frame: Up to 67 weeks

  12. Number of participants with Anti-drug antibody (ADA) against dostarlimab

    Time frame: Up to 226 weeks

  13. Number of participants with adverse events (AEs), Immune-mediated adverse events (imAEs), and serious adverse events (SAEs) by severity

    Time frame: Up to 226 weeks

  14. Number of participants with AEs, imAEs, and SAEs leading to dose modifications or study intervention discontinuation

    Time frame: Up to 226 weeks

  15. Number of participants with AEs leading to death

    Time frame: Up to 226 weeks

07

Study locations

1 of 1 sites recruiting
  • GSK Investigational Site
    Jinan, Shandong 250117, China
    Recruiting
08

References and documents

Individual participant data

Plan to share: Yes — Study Sponsor will assess requests from qualified researchers for anonymized individual patient-level data and related study documents. Data sharing is subject to certain criteria, conditions, and exceptions. For further information, refer to https://www.gsk-studyregister.com/About\_GSK\_Patient\_Level\_Data\_Sharing\_Final\_13July2023.pdf

Supporting information: Study protocol, Sap, Icf, Csr

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Dec 22, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT07108270
Lead sponsor
GlaxoSmithKline
Responsible party
Sponsor
First posted
Aug 7, 2025
Start date
Nov 27, 2025
Primary completion
Mar 31, 2030 (estimated)
Completion
Mar 31, 2030 (estimated)
Last update
Dec 22, 2025

Study contacts

US GSK Clinical Trials Call Center
Contact
GSKClinicalSupportHD@gsk.com
877-379-3718
EU GSK Clinical Trials Call Center
Contact
GSKClinicalSupportHD@gsk.com
+44 (0) 20 89904466

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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