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NCT Number: NCT07225270

Study to Assess the Efficacy and Safety of Rina-S Plus Standard of Care Compared to Standard of Care for Maintenance Treatment of Participants With Recurrent Platinum-sensitive Ovarian Cancer After Second-line (2L) Platinum-based Doublet Chemotherapy

This Phase 3 study will be conducted in different countries around the world with up to about 544 participants.

The purpose of this study is to evaluate how well Rina-S works against ovarian cancer in combination with available standard of care therapy that is already approved and used for ovarian cancer.

Participants will receive either Rina-S monotherapy (by itself), Rina-S plus bevacizumab, bevacizumab (standard of care) by itself, or no treatment (only monitoring, also standard of care). No participants will be given placebo. Participants will participate in 1 of 2 arms.

The treatment duration will be different for every participant. If a participant's cancer stays the same or gets better, and there are not any serious problems, participants can keep getting study treatment for as long as the study is open.

Participants will be asked to attend 1 to 3 visits at the study clinic for each cycle (duration of cycle is 3 weeks). During visits, there will be various tests (such as blood draws) and procedures (such as recording of heart activity and imaging) to monitor whether the study treatment is safe and effective. The overall study duration (including screening, treatment, and follow-up) for each participant will be different for every participant.

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Key information

Conditions

Ovarian Cancer Adnexal Diseases Endocrine Gland Neoplasms Endocrine System Diseases Female Urogenital Diseases Female Urogenital Diseases and Pregnancy Complications Genital Diseases Genital Diseases, Female Genital Neoplasms, Female Gonadal Disorders Neoplasms Neoplasms by Site Ovarian Diseases Ovarian Neoplasms PSOC Platinum-sensitive Ovarian Cancer Urogenital Diseases Urogenital Neoplasms

Age range

18 year and older

Sex eligibility

Female

Study type

Interventional

Phase

Phase 3

Primary location

National Hospital Organization Hokkaido Cancer Center, Sapporo, Hokkaido, Japan

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About this study

This is a randomized, open-label, Phase 3 study of Rina-S + standard of care (SOC) versus SOC as maintenance treatment after second-line (2L) platinum-based doublet chemotherapy in participants with recurrent PSOC.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Key Inclusion Criteria:

  • Must have histologically or cytologically confirmed high-grade serous or endometrioid epithelial ovarian cancer (EOC), primary peritoneal cancer, or fallopian tube cancer.
  • Must have PSOC defined as progressive disease > 6 months (ie, 183 days) from the last dose of primary (first-line [1L]) platinum therapy.
  • Participants with known breast cancer (BRCA)-mutated (somatic or germline) or homologous recombination deficiency (HRD)-positive ovarian cancer who achieved complete response (CR)/no clinical evidence of disease (NED) or partial response (PR) following 1L platinum-based chemotherapy regimen must have previously received PARPi maintenance therapy as part of their 1L treatment.
  • Must have completed platinum-based chemotherapy in the 2L treatment for recurrent PSOC.
  • Must be randomized no later than 8 weeks from the last dose of the 2L platinum-based therapy.
  • Participants must have achieved a CR/NED, PR; or SD permitted only if bevacizumab was given in 2L in combination with platinum-based chemotherapy, as assessed by the investigator, following completion of 2L platinum-based chemotherapy.

Key Exclusion Criteria:

  • Participants with clear cell, mucinous, or sarcomatous histology, mixed tumors containing any of the above histologies, or low-grade/borderline ovarian tumors
  • More than 2 prior lines of systemic therapy.
  • Progression while on or following 2L platinum-based regimen prior to randomization.
  • Participants who receive an intervening systemic anticancer treatment (excluding bevacizumab) after the last dose of 2L platinum-based chemotherapy and prior to randomization.

Note: Other protocol-defined Inclusion and Exclusion criteria may apply.

Treatment and study plan

Rina-S

Drug

Intravenous (IV) infusion

Other names: Rinatabart sesutecan, GEN1184, PRO1184

Bevacizumab

Drug

IV infusion

Primary outcomes

  1. Progression-free Survival (PFS) per Response Evaluation Criteria in Solid Tumours (RECIST) 1.1, as Determined by Blinded Independent Central Review (BICR)

    Time frame: Up to approximately 3 years

Secondary outcomes

  1. Overall Survival

    Time frame: Up to approximately 4 years

  2. PFS, per RECIST 1.1, as Determined by Investigator Assessment

    Time frame: Up to approximately 3 years

  3. Second Determination of PFS (PFS2)

    Time frame: Up to approximately 4 years

  4. Number of Participants with Treatment-emergent Adverse Events (TEAEs)

    Time frame: Up to approximately 4 years

  5. Overall Change from Baseline in Global Health Status (GHS)/Quality of Life (QoL) Score Using the European Organisation for Research and Treatment of Cancer (EORTC) Quality of Life Questionnaire Core 30 (QLQ-C30) Questionnaire

    Time frame: Up to approximately 4 years

  6. Time to Deterioration (TTD) in the GHS/QoL Score Using the QLQ-C30

    Time frame: Up to approximately 4 years

Study contacts

Contact information is provided by the study sponsor or research team.

Genmab Trial Information

CONTACT

[email protected]

+4570202728

Sponsors and collaborators

Lead sponsor

Genmab

Industry

Registry information

Official study title

A Randomized, Open-Label, Phase 3 Study of Rinatabart Sesutecan (Rina-S) Plus Standard of Care Versus Standard of Care as Maintenance Treatment After 2L Platinum-Based Doublet Chemotherapy in Participants With Recurrent Platinum-Sensitive Ovarian Cancer (PSOC)

Acronym: RAINFOL-04

Important dates

Study start
2026
Primary completion
2028
Study completion
2030
First posted
Nov 6, 2025
Registry last updated
Jul 16, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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