ABSTRACT
Objective@#The survival benefits of retroperitoneal lymphadenectomy (RLNA) for epithelial ovarian cancer (EOC) remain controversial because clinical behaviors differ among subtypes. The purpose of the present study was to clarify whether RLNA increases the survival rate of advanced high-grade serous carcinoma (HGSC). @*Methods@#This was a retrospective cohort analysis of 3,227 patients with EOC treated between 1986 and 2017 at 14 institutions. Among them, 335 patients with stage IIB-IV HGSC who underwent optimal cytoreduction (residual tumor of <1 cm) were included. Patients were divided into the RLNA group (n=170) and non-RLNA group (n=165). All pathological slides were assessed based on a central pathological review. Oncologic outcomes were compared between the two groups in the original and weighted cohorts adjusted with the inverse probability of treatment weighting. @*Results@#The median observation period was 49.8 (0.5–241.5) months. Overall, 219 (65%) out of 335 patients had recurrence or progression, while 146 (44%) died of the disease. In the original cohort, RLNA was a significant prognostic factor for longer progression-free survival (PFS) (hazard ratio [HR]=0.741; 95% confidence interval [CI]=0.558–0.985) and overall survival (OS) (HR=0.652; 95% CI=0.459–0.927). In the weighted cohort in which all variables were well balanced as standardized differences decreased, RLNA was also a significant prognostic factor for more favorable oncologic outcomes (PFS, adjusted HR=0.742; 95% CI=0.613–0.899) and OS, adjusted HR=0.620; 95% CI=0.488–0.787). @*Conclusion@#The present study demonstrated that RLNA for stage III-IV HGSC with no residual tumor after primary debulking surgery contributed to better oncologic outcomes.
ABSTRACT
Uterine leiomyosarcoma (ULMS) is one of the most aggressive gynecological malignancies. In the past decade, novel therapeutic agents such as trabectedin and pazopanib have been approved, but the prognosis of patients remains unsatisfactory. This study aimed to identify potential therapeutic targets for ULMS based on transcriptome analysis. Archival fresh-frozen tumor tissues of 6 ULMS and three leiomyoma samples were used in this study, and total RNA was extracted. First, transcriptome analysis identified 512 significantly differentially expressed genes, and subsequent pathway analysis using IPA software revealed that the functions of cell cycle-related kinases were significantly activated in ULMS. Moreover, our results were validated using 3 independent Gene Expression Omnibus datasets, including 40 ULMS. Therefore, we considered the kinases as novel therapeutic targets and evaluated the anti-cancer effects of several selective inhibitors against them. Most inhibitors exerted a higher anti-cancer effect than pazopanib in three leiomyosarcoma cell lines. Especially, CHEK1 or PLK1 inhibitors strongly induced cell cycle arrest and cell death, and the IC50s were lower nanomolar concentration. Moreover, the inhibitors suppressed the tumor growth in SK-UT-1 bearing mice models. In conclusion, we revealed the unique gene expression profiles of ULMS. CHEK1 and PLK1 are promising therapeutic targets for ULMS, and therefore, further clinical trials are highly anticipated to improve the prognosis of the patients.