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New vaccine targets tough ovarian cancer in tiny trial

NCT ID NCT07455071

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This early study tests a personalized vaccine (YS247) made from a patient's own immune cells to fight a specific type of ovarian cancer (HRD-negative). Only 9 women who haven't been cured by standard therapy will take part. The main goal is to check safety, not yet to prove it works.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
personalized dendritic cell vaccine (YS247)
What this could lead to
If it works, this could point toward a new treatment option for a hard-to-treat form of ovarian cancer.
What could go wrong
This is a very early, small trial (9 people) focused on safety, not effectiveness. The vaccine is personalized and complex, so it may not work for everyone or may cause side effects.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 9 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Mar 2026

An estimate. Start dates often move.

Expected to finish

Nov 2027

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 70 years

Sex

Female participants only

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Female aged 18-70 years (inclusive of cut-off values); body weight ≥45 kg. 2. Failed to achieve Complete Response (CR) after completion of at least first-line therapy (i.e., surgery and platinum-based chemotherapy), with abnormal CA125 levels or at least one measurable lesion confirmed by imaging assessment. 3. Completed genomic and transcriptomic sequencing of tumor samples, finished the analysis of genetic mutation characteristics and immune characteristics of tumor samples, and is eligible for screening of personalized tumor neoantigens. 4. Laboratory examinations must meet the following criteria: white blood cell count ≥4.0×10⁹/L; absolute lymphocyte count ≥1.0×10⁹/L; platelet count ≥80×10⁹/L; hemoglobin ≥9.0 g/L; aspartate aminotransferase (AST) and alanine aminotransferase (ALT) ≤2.5×Upper Limit of Normal (ULN) (≤5×ULN for patients with concurrent liver metastases); bilirubin ≤1.5×ULN (≤3×ULN for patients with Gilbert's syndrome); alkaline phosphatase (ALP) ≤2.5×ULN (≤5×ULN for patients with concurrent liver metastases); albumin ≥30 g/L; serum creatinine and/or urea \<1.5 times the normal value; coagulation tests: international normalized ratio (INR) \<1.7 or prolonged prothrombin time (PT) \<4 seconds. 5. 12-lead electrocardiogram (ECG) must meet the following criteria: no severe arrhythmia, QTcF ≤480 ms. 6. Toxic and adverse reactions induced by previous treatments must have recovered to Grade ≤1 (per NCI-CTCAE v5.0), with the exception of stable Grade 2 sensory neuropathy or alopecia (per CTCAE). 7. With patent vascular access and capable of undergoing peripheral blood mononuclear cell (PBMC) collection. 8. Expected survival time \>6 months. 9. Eastern Cooperative Oncology Group (ECOG) Performance Status (PS) score of 0-1 (see Appendix 2). 10. Fertile study participants must agree to adopt medically effective contraceptive measures throughout the trial period and for at least 6 months after the last administration; fertile study participants must have a negative pregnancy test result within 28 days prior to enrollment and at baseline. 11. Study participants are able to understand the trial procedures, are willing to comply with the clinical trial protocol to complete the trial, and have signed the informed consent form (ICF). Exclusion Criteria: 1. (Per interview) Allergic diathesis with hypersensitivity to two or more drugs, or known hypersensitivity to any component of the personalized neoantigen-sensitized autologous dendritic cell injection (cell cryopreservation solution CS10, human albumin, 0.9% sodium chloride injection). 2. (Per interview) A past or current diagnosis of Myelodysplastic Syndrome (MDS) or Acute Myeloid Leukemia (AML). 3. (Per interview) Patients with symptomatic, uncontrolled brain metastasis or leptomeningeal metastasis. 4. (Per interview) Suffering from severe or uncontrolled diseases, including but not limited to: uncontrolled ventricular arrhythmia, myocardial infarction within the recent 3 months, uncontrolled grand mal epilepsy, unstable spinal cord compression, superior vena cava syndrome, immunodeficiency (excluding splenectomy), or other diseases that the investigator deems may expose the patient to a high risk of harm. 5. Positive for Human Immunodeficiency Virus (HIV) antibody, Treponema Pallidum (TP) antibody, or Hepatitis C Virus (HCV) antibody; or evidence of active hepatitis B via Hepatitis B Virus (HBV) surface antigen/HBV DNA testing. 6. New York Heart Association (NYHA) Grade III-IV congestive heart failure, or clinically significant arrhythmia with poor control. 7. Uncontrolled arterial hypertension (systolic blood pressure ≥160 mmHg or diastolic blood pressure ≥100 mmHg). 8. (Per interview) A history of or current comorbidities including the following:a) Autoimmune disease requiring long-term (more than 2 months) systemic immunosuppressant (corticosteroid) therapy, or immune-mediated symptomatic diseases (including ulcerative colitis, Crohn's disease, rheumatoid arthritis, Systemic Lupus Erythematosus (SLE), autoimmune vasculitis (e.g., Wegener's granulomatosis));b) A past diagnosis of immune-mediated motor neuron disease;c) A past diagnosis of Toxic Epidermal Necrolysis (TEN);d) Any psychiatric disorder (including dementia, altered mental status) that may impair the understanding and completion of informed consent and relevant questionnaires;e) Long-term use of non-inhaled corticosteroids, hydroxyurea, or immunomodulatory drugs;f) A history of other active malignant tumors within the past 5 years (excluding patients with basal or squamous cell skin cancer, superficial bladder cancer, or carcinoma in situ of the breast that have been completely cured and require no follow-up treatment);g) Hypothyroidism (patients with hypothyroidism requiring only thyroid hormone replacement therapy are eligible for enrollment). 9. (Per interview) Judged by the investigator as unsuitable for enrollment or unable to comply with the protocol requirements, including but not limited to: persistent fever (\>24 h) documented by repeated measurements or due to active, uncontrolled infection from screening to prior to drug administration. 10. (Per interview) Receipt of cellular immunotherapy within the past 6 months (including: Cytokine-Induced Killer (CIK) cells, dendritic cell (DC) therapy, DC-CIK therapy, Lymphokine-Activated Killer (LAK) cells, and other cellular immunotherapies). In addition to the above requirements, patients who meet any of the following criteria shall also be excluded prior to the collection of autologous peripheral blood mononuclear cells (PBMCs): 11. Receipt of platelet or red blood cell transfusion within 3 weeks prior to collection. 12. Receipt of chemotherapy within 3 weeks prior to collection. 13. Receipt of anti-angiogenic tyrosine kinase inhibitor (TKI) small-molecule drugs within 3 weeks prior to collection. 14. Use of corticosteroids (or analogs) or systemic administration of immunomodulatory therapies within 3 weeks prior to collection. 15. Participation in a clinical study of an investigational non-biolgical product (administered within the past 30 days or 5 half-lives, whichever is longer) or an investigational biological product (monoclonal or polyclonal antibodies) (administered within the past 4 months or 5 half-lives, whichever is longer) prior to screening. 16. Pregnant or lactating female study participants. 17. Study participants with insufficient sensitivity to immunotherapy as determined by tumor genetic analysis. 18. Study participants who are judged by the investigator as unable to adhere to the trial procedures, or deemed ineligible for enrollment for any other reason.

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Conditions

The condition(s) this trial relates to.

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  2. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.