Exploratory Study on HER2 Detection Method and Positive Threshold for High-grade Serous Adenocarcinoma of the Ovary

Sun Yat-sen University

Status: Enrolling

Conditions: Observing the Effectiveness of Targeted HER2 ADC Drugs; Exploring HER2 Positive Diagnostic Criteria in High-grade Serous Ovarian Cancer

Treatments: Other: No intervention

Study type: Observational

Funder types: Other

Identifiers

NCT06883487

SYSKY-2024-259-01

Details and patient eligibility

About

Ovarian cancer is the most lethal gynecological malignancy, and 70% of ovarian cancer patients are diagnosed late at the time of new diagnosis. Even after systematic treatment, 75% of patients still relapse within 3 years and 70% die within 5 years. The survival prognosis of platinum resistant and refractory ovarian cancer populations is currently an urgent issue that needs attention. Antibody drug conjugate (ADC) targeting human epidermal growth factor receptor 2 (HER2) significantly improved the survival prognosis of patients with multiple solid tumors, such as breast cancer, gastric cancer, colorectal cancer, etc. Anti HER2 drugs have been a research hotspot in the treatment of advanced ovarian cancer in recent years. The expression status of HER2 has a decisive impact on the efficacy of ADC drugs targeting HER2. However, there is still a lack of large-scale data on HER2 expression rate in ovarian cancer patients, and there is no clear detection standard to guide clinical practice, which restricts the application of anti-HER2 ADC drugs in ovarian cancer.

To address this critical clinical issue, we initiated this study, which was divided into two parts: ① Retrospective study: Using the existing 144 samples of high-grade serous epithelial ovarian cancer(HGSOC) in our center, we used immunohistochemistry (IHC), DNA in situ hybridization (ISH), and second-generation sequencing (NGS) techniques to detect HER2 status, clarify the relationship between HER2 expression rate and patient survival outcomes, and preliminarily explore the best detection techniques and corresponding positive judgment thresholds for evaluating HER2 status in HGSOC; ② Real world observational study: To verify the predictive value of the positive judgment threshold determined in ① for efficacy in 20 ovarian cancer patients who received HER2 targeted ADC drugs due to platinum resistance/platinum refractory and no other effective treatment options in clinical practice. The aim of this project is to explore for the first time a reliable and feasible method for assessing the expression status of HER2 in patients with epithelial ovarian cancer, in order to provide a basis for subsequent evaluation of targeted HER2 therapy.

Enrollment: 144 estimated patients

Sex: Female

Ages: 18 to 75 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

1. Pathological type: high-grade serous adenocarcinoma of the ovary
2. Pathological slices stored within 5 years
3. FIGO stage II or above
4. Complete clinical and follow-up data

Exclusion criteria

1. Slice quality control failure
2. Incomplete follow-up data

Trial design

144 participants in 1 patient group

1

Description:

Specimen with the diagnosis of high-grade serous ovarian adenocarcinoma within 5 years. The International Federation of Gynecology and Obstetrics(FIGO) stage is II or above with complete follow-up data.

Treatment:

Other: No intervention