Addition of Pembrolizumab to the Standard of Care Chemotherapy in Patient With SCCOHT (PembroSCCOHT)

Multicentric Non-randomized Phase II of Pembrolizumab in Combination With Etoposide-cisplatin-based Chemotherapy in First-line Small Cell Ovarian Carcinoma of Hypercalcemic Type

Small cell ovarian carcinomas are rare and have a very poor prognosis affecting a young population. The objective of this study is to increase the efficacy of the initial chemotherapy by providing immunotherapy and to be able to offer to more patients the possibility of benefiting from an intensification of chemotherapy, which is a major prognostic factor in this population.

Study Overview

• Status: Recruiting
• Conditions: Small Cell Ovarian Carcinoma
• Intervention / Treatment: Drug: Pembrolizumab 25 MG/ML [Keytruda]

• Study Type: Interventional
• Enrollment (Estimated): 27
• Phase: Phase 2

Contacts and Locations

• Study Contact: Name: Latifa BOUDALI; Phone Number: +33(0)-1-84-85-20-42; Email: pembroSCCOHT@arcagy.org

Study Locations

• France
  • Angers, France, 49055
    • Recruiting
    • ICO - Paul Papin
    • Principal Investigator: Paule AUGEREAU, MD
  • Angers, France, 49933
    • Active, not recruiting
    • Centre Hospitalier Universitaire d'Angers
  • Besançon, France, 25030
    • Active, not recruiting
    • Centre Hospitalier Régional Universitaire de Besançon
  • Bordeaux, France, 33076
    • Active, not recruiting
    • Institut Bergonie
  • Dijon, France, 21079
    • Active, not recruiting
    • Centre Georges Francois Leclerc
  • Lille, France, 59020
    • Active, not recruiting
    • Centre Oscar Lambret
  • Limoges, France, 87042
    • Recruiting
    • Chu de Limoges - Hopital Dupuytren
    • Principal Investigator: Laurence VENAT-BOUVET, MD
  • Lyon, France, 69373
    • Recruiting
    • Centre Léon Bérard
    • Principal Investigator: Isabelle Ray-Coquard, MD
  • Montpellier, France, 34298
    • Withdrawn
    • Icm Val D'Aurelle
  • Strasbourg, France
    • Not yet recruiting
    • Hopital de Hautepierre
    • Principal Investigator: Lauriane EBERST
  • Strasbourg, France, 67033
    • Recruiting
    • ICANS - Institut de cancérologie Strasbourg Europe
    • Principal Investigator: Lauriane Eberst, MD
  • Toulouse, France, 31059
    • Recruiting
    • Oncopole Claudius Régaud - IUCT Oncopole
    • Principal Investigator: Laurence Gladieff, MD
  • Villejuif, France, 94805
    • Recruiting
    • Gustave Roussy
    • Principal Investigator: Patricia PAUTIER, MD

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 16 years and older (Child, Adult, Older Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

1. Patient who are at least 12 years of age on the day of signing informed consent with previously untreated, pathologically confirmed Small cell carcinoma of the ovary.Patients could be included after one cycle of chemotherapy but have to start treatment within 4 weeks after the first cycle of chemotherapy. They will start the scheme at cycle 2.
2. Stage FIGO I to IV classification
3. Have an Eastern Cooperative Oncology Group (ECOG) Performance Status of 0 or 1

4. Have adequate organ function:

   • Adequate marrow function

     • White blood cell (WBC) >2000/mm3 (stable off any growth factor within 4 weeks of first study drug administration)
     • Neutrophils >1500/ mm3 (stable off any growth factor within 4 weeks of first study drug administration)
     • Platelets > 100 × 103/mm3 (transfusion to achieve this level is not permitted within 2 weeks of first study drug administration)
     • Haemoglobin > 9 g/dL (transfusion to achieve this level is not permitted within 2 weeks of first study drug administration)

   • Adequate other organ functions

     • ALT and AST < 3× institutional ULN
     • Total bilirubin < 1.5× institutional ULN (except Gilbert Syndrome: < 3.0 mg/dL)
     • Normal thyroid function, subclinical hypothyroidism (thyroid-stimulating hormone [TSH] < 10 mIU/mL) or have controlled hypothyroidism on appropriate thyroid supplementation
     • Left ventricular ejection fraction (LVEF) > 55 % measured by ECHO (preferred) or MUGA scans
     • Serum creatinine < 2× ULN or creatinine clearance (CrCl) > 60 mL/min (measured using the Cockcroft-Gault formula below):
5. The participant (or legally acceptable representative if applicable) provides written informed consent for the trial, prior to any study-specific procedure. The participant may also provide consent for (140 - age in years) × weight in kg × 0.85 Female CrCl = 72 × serum creatinine in mg/dL GINECO-OV243b - PembroSCCOHT - Protocol - Version 1.2 - 10/09/2020 Page 7 sur 83 Future Biomedical Research. However, participant may participate in the main trial without participating in Future Biomedical Research.
6. Covered by a medical insurance
7. Stated willingness to comply with all study procedures and availability for the duration of the study
8. Women of childbearing potential must have a negative serum or urine pregnancy test within 72 hours prior to treatment allocation
9. For females of reproductive potential: use of highly effective contraception throughout the study period up to 120 days after the last dose of pembrolizumab and 180 days following the end of chemoradiotherapy (if applicable).

Exclusion Criteria:

1. Prior therapy for the disease with chemotherapy and/or an anti-PD-1, anti-PD-L1, or anti-PD-L2 agent or with an agent directed to another stimulatory or co-inhibitory T-cell receptor (eg, CTLA-4, OX-40, CD137).

2. Patients who have received a live vaccine within 30 days prior to the first dose of study drug.

   Examples of live vaccines include, but are not limited to, the following: measles, mumps, rubella, varicella/zoster (chicken pox), yellow fever, rabies, Bacillus Calmette-Guérin (BCG), and typhoid vaccine. Seasonal influenza vaccines for injection are generally killed virus vaccines and are allowed; however, intranasal influenza vaccines (e.g., FluMist®) are live attenuated vaccines and are not allowed. Inactivated rabies vaccines are allowed.

3. Patients who have had an allogenic tissue/solid organ transplant.
4. Patient who has received more than one cycle of platinum-based chemotherapy, or any prior systemic anti-cancer therapy including investigational agents for the SCCOHT. (Patients could be included after one cycle of platinum-based therapy).
5. Patients who have a known diagnosis of immunodeficiency or is receiving chronic systemic steroid therapy (in dosing exceeding 10 mg prednisone daily or equivalent) or any other form of immunosuppressive therapy within 7 days prior the first dose of study drug.

6. Patients who have a known additional malignancy that is progressing or has required active treatment within the past 5 years.

   Note: Participants with basal cell carcinoma of the skin, squamous cell carcinoma of the skin, superficial bladder cancer, or carcinoma in situ (e.g., breast carcinoma, cervical cancer in situ) that have undergone potentially curative therapy are not excluded.

7. Patients who have a contraindication to any component of cisplatin, adriamycine, vepeside and cyclophosphamide.

   Note: Investigators must use the local label for contraindications, prohibited medications, and precautions for use.

8. Patients who have severe hypersensitivity (Grade 3 or higher) to pembrolizumab and/or any of its excipients (refer to the IB for a list of excipients).
9. Patients who have a known severe hypersensitivity (Grade 3 or higher) to any of the study chemotherapy agents and/or to any of their excipients (refer to the approved product label(s) for a list of excipients).
10. Patients who have an active autoimmune disease that has required systemic treatment in past 2 years (ie, with use of disease modifying agents, corticosteroids or immunosuppressive drugs). Replacement therapy (eg, thyroxine, insulin, or physiologic corticosteroid replacement therapy for adrenal or pituitary insufficiency) is not considered a form of systemic treatment and is allowed.
11. Patients who have a history of (non-infectious) pneumonitis/ interstitial lung disease that required steroids or has current pneumonitis / interstitial lung disease that requires steroids.
12. Has an active infection requiring systemic therapy.
13. Has a known history of human immunodeficiency virus (HIV) infection. HIV testing is not required unless mandated by local health authority.
14. Has a history of hepatitis B (defined as hepatitis B surface antigen [HBsAg] reactive) or active hepatitis C virus (defined as HCV RNA [qualitative] is detected) infection.
15. Has a known history of active tuberculosis (TB; Bacillus tuberculosis)
16. Has a history or current evidence of any condition, therapy, or laboratory abnormality that might confound the results of the study, interfere with the participant's participation for the full duration of the study, or is not in the best interest of the participant to participate, in the opinion of the treating investigator.
17. Has a known psychiatric or substance abuse disorder that would interfere with cooperating with the requirements of the study.
18. Breastfeeding women
19. Participation in another clinical study with an investigational product 30 days prior and during the treatment course, and 30 days after end of treatment.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm

Intervention / Treatment

Experimental: Pembrolizumab; Single arm study

Drug: Pembrolizumab 25 MG/ML [Keytruda]; Pembrolizumab (200mg flat dose) will be administred in combinaison with PAVEP chemotherapy for the first 6 cycles (21-day cycle) Then, Pembrolizumab (200mg flat dose) will be administred in monotherapy until one year for patients with complete response and up to two years for patients with Stable disease or Progression response after the end of first-sequence therapy (PAVEP chemotherapy +/- High dose chemotherapy) or until disease progression.; Other Names: MK-3475

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Complete response rate	CRR is defined as the proportion of patients who reached complete response (CR), according to RECIST v1.1 after the first sequence therapy including chemotherapy associated with immunotherapy and surgery.	Around 4 to 6 months of the last patient included

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Incidence of Treatment-Emergent Adverse Events [Safety and Tolerability of pembrolizumab in combinaison with chemotherapy]	Adverse Events will be described in terms of frequency according to CTCAE v5 grade	30 days after the end of Cycle 6 (each cycle is 21 days)
Incidence of Treatment-Emergent Adverse Events [Safety and Tolerability of pembrolizumab in monotherapy]	Adverse Events will be described in terms of frequency according to CTCAE v5 grade	30 days after last treatment intake
Progression Free Survival (PFS)	PFS is defined as the time from inclusion until the date of event defined as the first objective documented progression, according to investigator assessment of RECIST v1.1 or death (by any cause in the absence of progression).	from date of inclusion to date of event, assessed up to 5 years
Overall Survival (OS)	OS is defined as the time from the date of inclusion until death due to any cause. Any patient not known to have died at the time of analysis will be censored based on the last recorded date on which the patient was known to be alive.	from date of inclusion to death, assessed up to 5 years
Partial Response Rate (PRR)	PRR is defined as the proportion of patients who reached partial response (PR), at the end of first-sequence therapy, according to RECIST v1.1.	Around 4 to 6 months of the last patient included
Duration of Response (DoR)	DOR is defined as the duration from complete response is first met until the first objective documented progression, according to RECIST v1.1.	assessed up to 42 months

Collaborators and Investigators

• Sponsor: ARCAGY/ GINECO GROUP
• Collaborators: Merck Sharp & Dohme LLC
• Investigators: Principal Investigator: Patricia PAUTIER, MD, PhD, Gustave Roussy, Cancer Campus, Grand Paris

Study record dates

Study Major Dates

• Study Start (Actual): August 4, 2021
• Primary Completion (Estimated): June 1, 2026
• Study Completion (Estimated): February 1, 2030

Study Registration Dates

• First Submitted: October 6, 2020
• First Submitted That Met QC Criteria: October 20, 2020
• First Posted (Actual): October 26, 2020

Study Record Updates

• Last Update Posted (Actual): November 28, 2025
• Last Update Submitted That Met QC Criteria: November 24, 2025
• Last Verified: November 1, 2025

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Urogenital Diseases; Genital Diseases; Endocrine System Diseases; Urogenital Neoplasms; Neoplasms by Site; Neoplasms; Female Urogenital Diseases; Female Urogenital Diseases and Pregnancy Complications; Neoplasms by Histologic Type; Genital Diseases, Female; Endocrine Gland Neoplasms; Neoplasms, Glandular and Epithelial; Ovarian Diseases; Adnexal Diseases; Genital Neoplasms, Female; Gonadal Disorders; Carcinoma, Ovarian Epithelial; Carcinoma; Ovarian Neoplasms; Antineoplastic Agents, Immunological; Immune Checkpoint Inhibitors; Antineoplastic Agents; Molecular Mechanisms of Pharmacological Action; pembrolizumab
• Other Study ID Numbers: GINECO-OV243b

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No