Background: High-grade serous ovarian carcinoma (HGSOC) is one of the most common
ovarian epithelial carcinomas. It is highly invasive, easily recurs after systemic treatment, and has a poor
prognosis. Despite many new chemotherapeutic drugs and trials of combinations of different regimens
that have been used in treatment attempts, there has been no meaningful progress in the treatment of
HGSOC. With the development of gene sequencing technology, gene therapy has become a new direction
for tumors treatment. It is reported that the P53 has a very high mutation rate in HGSOC, which provides
a theoretical basis for the application of gene therapy in HGSOC patients. Recombinant human p53
adenovirus injection (rAd-p53) is the world's first approved oncology gene therapy drug.
Case Report: In this article, we retrospectively analyzed 4 cases of HGSOC patients treated with rAdp53.
Three of them were recurrent ovarian cancer, and one was the initial treatment. The treatment
method was to apply recombinant human p53 adenovirus injection (rAd-p53) to the lesions for local
injection, 72 hours later, the lesions were injected with bleomycin or fluorouracil, and systemic intravenous
chemotherapy was performed simultaneously. After rAd-p53 treatment, one of the three relapsed
ovarian cancers achieved complete remission(CR), one achieved partial remission (PR), and
one was stable disease (SD); the treatment-naive patient was operated after rAd-p53 combined with
neoadjuvant chemotherapy and achieved pathological CR. Under the action of various mechanisms of
P53, the subsequent tumor treatment showed the characteristics of slow tumor progression, no ascites,
and local recurrence. As of the end of follow-up, the OS of 4 patients was 71-120 months.
Conclusion: Through the remarkable efficacy of these 4 cases, we can see that the application of rAdp53
combined with chemotherapy can effectively control tumor lesions, prolong the survival time of patients,
improve the quality of life of patients, which provide valuable experiences for rAd-p53 treatment
in ovarian cancer, promote the further development and progress of gene therapy in this field.