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High-grade Serous Ovarian Cancer (HGSOC)Phase 2NCT07432594

Neoadjuvant Aitua (PD-1/CTLA-4 Bispecific) Plus Nab-Paclitaxel and Carboplatin for Advanced High-Grade Serous Ovarian Cancer

A Phase 2 study testing Aitua Combination Antibody, Albumin-Bound Paclitaxel /nab-Paclitaxel and Carboplatin (AUC 5) in people with High-grade Serous Ovarian Cancer (HGSOC) and Fallopian Tube Cancers, run by Cancer Institute and Hospital, Chinese Academy of Medical Sciences at 1 site in China.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
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Trial summary

This is a prospective, randomized, controlled Phase II clinical study designed to evaluate the efficacy and safety of adding Aitua Combination Antibody (a PD-1/CTLA-4 bispecific antibody) to standard neoadjuvant chemotherapy for patients with advanced high-grade serous ovarian cancer. Read more about this study

Who is it for?
Ages 18 years and older, women only
What is being tested?
Aitua Combination Antibody, Albumin-Bound Paclitaxel /nab-Paclitaxel and Carboplatin (AUC 5)
Could I receive a placebo?
No, everyone receives an active treatment
How many people
82 participants
Where
1 siteChina
Study dates
23 Jul 2026to 30 Jun 2027
Phase
Phase 2
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • Women only
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Age ≥ 18 years.
  • Histologically confirmed high-grade serous ovarian cancer (HGSC), fallopian tube cancer, or primary peritoneal cancer.
  • International Federation of Gynecology and Obstetrics (FIGO) stage IIIC-IV.
  • Eastern Cooperative Oncology Group (ECOG) performance status of 0-1.
  • Assessed by a multidisciplinary team (MDT) based on imaging (± laparoscopic exploration) as initially unable to achieve satisfactory tumor debulking (R0 resection).
  • At least one measurable lesion according to Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 criteria.
  • Major organ function is basically normal.
  • Willing to provide tumor tissue, peripheral blood, and ascites samples for translational research.

Who cannot join

  • Pathological types other than high-grade serous carcinoma (HGSC).
  • Prior receipt of any form of anti-tumor therapy.
  • History of autoimmune disease or requiring immunosuppressive therapy.
  • Known allergy to study drug components.
  • Pregnant or lactating women.

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

China1 site, 1 recruiting
  • Cancer Hospital, Chinese Academy of Medical Sciences

    Beijing, Beijing Municipality, 100021

    Ning Li, MD, 8610-87787210, cancergcp@163.com

    Recruiting

Other trials in China

About this study

Official title: A Prospective, Randomized, Controlled Phase II Clinical Study of Albumin-Bound Paclitaxel/Carboplatin Combined With Aitua Combination Antibody (PD-1/CTLA-4 Bispecific Antibody) for the Neoadjuvant Treatment of Advanced High-Grade Serous Ovarian Cancer With Unsatisfactory Debulking

This is a prospective, randomized, controlled Phase II clinical study designed to evaluate the efficacy and safety of adding Aitua Combination Antibody (a PD-1/CTLA-4 bispecific antibody) to standard neoadjuvant chemotherapy for patients with advanced high-grade serous ovarian cancer.

The study focuses on patients who are newly diagnosed with Stage IIIC-IV ovarian, fallopian tube, or primary peritoneal cancer and are assessed as unable to achieve satisfactory tumor debulking (R0 resection) initially.

Read more

Participants will be randomized in a 1:1 ratio into two groups:

Experimental Group: Receives Nab-paclitaxel and Carboplatin combined with Aitua Combination Antibody.

Control Group: Receives Nab-paclitaxel and Carboplatin alone.

Both groups will receive 3 cycles of neoadjuvant treatment followed by Interval Debulking Surgery (IDS). The primary goal is to compare the R0 resection rate (complete removal of macroscopic tumor) between the two groups during surgery. Secondary goals include assessing pathological complete response (pCR), objective response rate, progression-free survival, and safety. The study also aims to explore how this combination therapy affects the tumor immune microenvironment.

Read the detailed description

Background and Rationale: Ovarian cancer has the highest mortality rate among gynecological malignancies, with High-Grade Serous Carcinoma (HGSC) being the most common subtype. HGSC is characterized by a highly immunosuppressive Tumor Immune Microenvironment (TiME), often referred to as an "immune desert," which limits the efficacy of single-agent immune checkpoint inhibitors (ICIs) targeting the PD-1/PD-L1 pathway.

Investigational Agent: Aitua Combination Antibody (QL1706) is a novel bifunctional antibody targeting both PD-1 and CTLA-4. Dual blockade of these pathways may synergistically activate anti-tumor immune responses: CTLA-4 inhibition promotes early T-cell activation in lymph nodes, while PD-1 inhibition reverses T-cell exhaustion within the tumor microenvironment. Previous studies in cervical cancer have shown that this bispecific antibody may offer improved efficacy with a manageable toxicity profile compared to combining two separate antibodies.

Chemotherapy Synergy: Albumin-bound paclitaxel (Nab-paclitaxel), a standard component of ovarian cancer treatment, avoids the need for corticosteroid pretreatment and has been shown to potentially enhance immune cell infiltration and regulate macrophage polarization. This study hypothesizes that combining Nab-paclitaxel/Carboplatin with the PD-1/CTLA-4 bispecific antibody will remodel the immune microenvironment and improve surgical outcomes.

Study Design: This is a single-center, open-label (with blinded assessment), randomized Phase II trial. Approximately 82 eligible patients will be stratified by FIGO stage (IIIC vs. IV) and randomized 1:1 to the experimental or control arm.

Neoadjuvant Phase: Patients receive 3 cycles of therapy (Q3W).

Surgical Phase: Patients with responsive or stable disease will undergo Interval Debulking Surgery (IDS). The primary endpoint is the R0 resection rate (no macroscopic residual disease).

Adjuvant Phase: Post-surgery, patients will continue treatment with the assigned regimen for additional cycles.

Translational Research: Tumor tissue, ascites, and peripheral blood will be collected at baseline, pre-surgery, and during therapy to analyze changes in immune cell subsets (e.g., via scRNA-seq, mIHC/mIF) and identify potential predictive biomarkers.

Being tested
Aitua Combination Antibody, Albumin-Bound Paclitaxel /nab-Paclitaxel, Carboplatin (AUC 5), Interval Debulking Surgery
Keywords
Neoadjuvant Chemotherapy, Interval Debulking Surgery, PD-1/CTLA-4 Bispecific Antibody, Aitua Combination Antibody, Nab-paclitaxel, Carboplatin, Immunotherapy
Medical subject headings
Fallopian Tube Neoplasms

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Aitua Combination AntibodyDrug

    Also called PD-1/CTLA-4 Bispecific Antibody, QL1706

    Administered via intravenous infusion at a dose of 5 mg/kg on Day 1 of each 3-week cycle.

  • Albumin-Bound Paclitaxel /nab-PaclitaxelDrug

    Administered via intravenous infusion at a dose of 260 mg/m^2 on Day 1 of each 3-week cycle.

  • Carboplatin (AUC 5)Drug

    Administered via intravenous infusion at a dose of AUC 5 on Day 1 of each 3-week cycle.

  • Interval Debulking SurgeryProcedure or surgery

    Performed after 3 cycles of neoadjuvant therapy. The goal is to achieve R0 resection (no macroscopic residual disease).

Study groups in NCT07432594
Study groupRoleWhat they receive
Nab-Paclitaxel + Carboplatin + Aitua Combo AbExperimentalParticipants receive Nab-paclitaxel (260 mg/m^2), Carboplatin (AUC 4-5), and Aitua Combination Antibody (5 mg/kg) intravenously on Day 1 of each 3-week cycle for 3 cycles as neoadjuvant therapy, followed by Interval Debulking Surgery (IDS).
Receives: Drug: Aitua Combination Antibody; Drug: Albumin-Bound Paclitaxel /nab-Paclitaxel; Drug: Carboplatin (AUC 5); Procedure: Interval Debulking Surgery
Nab-Paclitaxel + CarboplatinActive comparatorParticipants receive Nab-paclitaxel (260 mg/m^2) and Carboplatin (AUC 4-5) intravenously on Day 1 of each 3-week cycle for 3 cycles as neoadjuvant therapy, followed by Interval Debulking Surgery (IDS).
Receives: Drug: Albumin-Bound Paclitaxel /nab-Paclitaxel; Drug: Carboplatin (AUC 5); Procedure: Interval Debulking Surgery

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Rate of R0 resection

    Defined as the percentage of participants achieving optimal debulking surgery with no macroscopic residual disease (R0) after neoadjuvant therapy. This is assessed by the surgeon at the time of interval debulking surgery (IDS).

    Measured: At the time of surgery, up to 12 weeks

Secondary outcomes (7)
  1. Pathological complete response (pCR) rate

    Defined as the proportion of participants with no evidence of invasive cancer in the surgical specimens collected during interval debulking surgery (IDS).

    Measured: At the time of surgery, up to 12 weeks

  2. Objective response rate (ORR)

    Defined as the percentage of participants who achieve a best overall response (BOR) of complete response (CR) or partial response (PR) according to Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1, based on independent radiological review.

    Measured: From baseline up to approximately 2 years

  3. Disease control rate (DCR)

    Defined as the percentage of participants who achieve a best overall response (BOR) of complete response (CR), partial response (PR), or stable disease (SD) according to Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1.

    Measured: From baseline up to approximately 2 years

  4. Progression-free survival (PFS)

    Defined as the time from randomization to the first documented disease progression per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1, or death from any cause, whichever occurs first.

    Measured: From randomization up to approximately 2 years

  5. Incidence and severity of adverse events (AEs)

    Safety will be assessed by monitoring the frequency and severity of adverse events (AEs) and serious adverse events (SAEs), graded according to National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE) version 5.0. This includes monitoring for immune-related adverse events (irAEs).

    Measured: Through 28 days after the last dose of study drug, up to approximately 2 years

  6. Change from baseline in EORTC QLQ-C30 quality-of-life scores

    Patient-reported health-related quality of life will be assessed using the 30-item European Organisation for Research and Treatment of Cancer Quality of Life Questionnaire-Core 30 (EORTC QLQ-C30). Global health status/quality of life, functioning, and symptom scores will be calculated separately and transformed to a 0-100 scale according to the EORTC scoring manual. Higher global health status/quality of life and functioning scores indicate better outcomes, whereas higher symptom and financial difficulty scores indicate worse outcomes. Change from baseline will be assessed at each scheduled post-baseline visit.

    Measured: Baseline (before dosing on Cycle 1 Day 1), before dosing on Day 1 of Cycles 2 and 3, and within 7 days before interval debulking surgery (up to approximately 12 weeks).

  7. Change from baseline in EORTC QLQ-OV28 domain scores

    Patient-reported ovarian cancer-specific quality of life will be assessed using the 28-item European Organisation for Research and Treatment of Cancer Quality of Life Questionnaire-Ovarian Cancer Module (EORTC QLQ-OV28). The questionnaire assesses abdominal/gastrointestinal symptoms, peripheral neuropathy, other chemotherapy side effects, hormonal/menopausal symptoms, body image, attitude to disease/treatment, and sexual functioning. Domain scores will be calculated separately and transformed to a 0-100 scale. Higher symptom/problem scores indicate worse outcomes; sexual functioning scores will be oriented so that higher scores indicate better functioning. Change from baseline will be assessed at each scheduled post-baseline visit.

    Measured: Baseline (before dosing on Cycle 1 Day 1), before dosing on Day 1 of Cycles 2 and 3, and within 7 days before interval debulking surgery (up to approximately 12 weeks).

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted25 Feb 2026
  2. Study start23 Jul 2026
  3. Primary completion30 May 2027 (estimated)
  4. Study completion30 Jun 2027 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Model description
This is a prospective, randomized, open-label, controlled study. Eligible participants are stratified by FIGO stage (IIIC vs. IV) and randomized in a 1:1 ratio to receive either the experimental regimen or the control regimen.
Masking
Single blind
Who is masked
Outcomes assessor
Enrolment
82 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07432594
Sponsor's protocol ID
2025-I2M-C&T-B-065
Status last verified
Nov 2026
First submitted
12 Feb 2026
Last updated
4 Nov 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No: Due to institutional privacy regulations and patient confidentiality, individual participant data (IPD) will not be shared publicly.

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing Aitua Combination Antibody, Albumin-Bound Paclitaxel /nab-Paclitaxel and Carboplatin (AUC 5) in people with High-grade Serous Ovarian Cancer (HGSOC) and Fallopian Tube Cancers, run by Cancer Institute and Hospital, Chinese Academy of Medical Sciences at 1 site in China.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 8 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 4 Nov 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in China. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Ning Li, MD (8610-87787211, liningnci@126.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Rate of R0 resection (time frame: At the time of surgery, up to 12 weeks). It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 4 Nov 2026.

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