Genetic Markers of Susceptibility to Chemotherapy-induced Ovarian Damage in Cancer Patients Undergoing Ovarian Biopsy for Cryopreservation.
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 入组人数
- 50
- 试验地点
- 1
- 主要终点
- To compare the mutational status of genes involved in DNA repair mechanisms in ovarian tissue fragments from women who underwent ovarian cryopreservation and completed chemotherapy treatment for lymphoma or breast cancer
研究概览
简要总结
Italian Cancer Registry data show a steady increase in the number of cancer survivors due to advances in treatment. However, these treatments can impair ovarian function, causing premature ovarian insufficiency (POI). Women with POI may experience vasomotor symptoms, infertility, psychological distress, and a significant reduction in quality of life. POI typically occurs before age 40 and is characterized by irregular menstruation and biochemical alterations (elevated gonadotropins and low estradiol). Chronic estrogen deficiency in POI is associated with increased risks of cardiovascular disease, cognitive decline, osteoporosis, psychological issues, and reproductive dysfunction.
Preliminary studies suggest that chemotherapy-induced POI results from genetic changes in ovarian tissue, indicating a crucial role of genetic variations in individual susceptibility. Incidence rates of POI vary widely: about 38% after Hodgkin lymphoma and between 15% and 94% after breast cancer. Currently, there is no personalized pre-treatment risk assessment, complicating informed decision-making regarding ovarian function and fertility.
Fertility preservation options include ovarian tissue and oocyte cryopreservation. This study aims to compare the mutational status of DNA repair genes in ovarian tissue fragments from women who underwent ovarian cryopreservation and completed chemotherapy for lymphoma or breast cancer, categorized into those who developed POI and those who did not. Additionally, the mutational load of these genes will be compared between groups.
The study includes patients aged 18-38 who preserved ovarian tissue before gonadotoxic therapy between 2002 and 2024 at the IRCCS Azienda Ospedaliero-Universitaria di Bologna, Policlinico di S. Orsola. Two groups will be analyzed:
Group 1: Patients who developed POI after gonadotoxic treatment
Group 2: Patients who did not develop POI
Group assignment will be based on clinical and anamnesis data. Cryopreserved ovarian tissue from all participants will undergo advanced molecular analyses by Next Generation Sequencing (NGS) to assess germline and somatic mutational status and load. The genetic variant analysis, conducted in collaboration with the Computational Genomics Unit of IRCCS AOUBO, will focus on a panel of 26 DNA repair genes. Bioinformatic analysis will be performed using the Ion Reporter platform, with clinically relevant variants validated by orthogonal methods.
The study plans to enroll approximately 50 patients, 25 per group.
研究设计
- 研究类型
- Observational
- 观察模型
- Case Control
- 时间视角
- Retrospective
入排标准
- 年龄范围
- 18 Years 至 38 Years（Adult）
- 性别
- Female
- 接受健康志愿者
- 否
入选标准
- •Age ≥ 18 and ≤ 38 years at the time of cryopreservation
- •Patient diagnosed with breast cancer or lymphoma, who underwent ovarian biopsy and cryopreservation of ovarian tissue prior to the initiation of gonadotoxic treatment
- •Gonadotoxic therapy completed at least 6 months prior
- •Written informed consent obtained for participation in the study and for the processing of personal, sensitive, and genetic data
排除标准
- •Patients with a history of gonadotoxic treatments prior to ovarian tissue cryopreservation
- •Patients undergoing hormonal therapy that suppresses ovarian function (e.g., GnRH analogs)
- •Presence of other conditions potentially responsible for premature ovarian insufficiency [e.g., BRCA1 and BRCA2 mutations, Li-Fraumeni syndrome, Bloom syndrome, Fanconi anemia, Fragile X syndrome, Cowden syndrome, Lynch syndrome (Hereditary Non-Polyposis Colorectal Cancer - HNPCC), Ataxia-Telangiectasia]
- •Family history of premature ovarian insufficiency
结局指标
主要结局
To compare the mutational status of genes involved in DNA repair mechanisms in ovarian tissue fragments from women who underwent ovarian cryopreservation and completed chemotherapy treatment for lymphoma or breast cancer
时间窗: At least 6 months after the end of chemotherapy
Onset of POI (Premature Ovarian Insufficiency)
次要结局
- To compare the mutational load of altered genes between women who developed POI and those who did not after undergoing chemotherapy(At least 6 months after the end of chemotherapy)