Adriana Ionelia Apostol

Real-life observational study on niraparib in older patients with primary tubo-ovarian cancer: a focus on safety and efficacy

Abstract Background Niraparib is approved for maintenance treatment of tubo-ovarian cancer patients, but data on older patients are limited. This retrospective study evaluated its safety and efficacy in primary advanced tubo-ovarian cancer, focusing on patients ≥ 75 years. Methods Women aged ≥ 50 years diagnosed with primary high-grade serous tubo-ovarian cancer, treated with niraparib between 2019–2023, were enrolled. Patients were stratified into three groups: A (50–64 years), B (65–74 years), and C (≥ 75 years). The primary outcome was progression-free survival. The secondary outcomes were toxicity and dose reduction. Results 127 patients were identified: 62 (48.8%) group A, 26 (20.5%) group B, and 39 (30.7%) group C. Baseline characteristics were comparable across groups, excluding a higher proportion of interval cytoreductive surgeries ( p  = 0.001), residual tumor ( p  = 0.01) and Eastern Cooperative Oncology Group (ECOG) > 1 ( p  = 0.01) in group C. Most patients started niraparib at 200 mg/day with dose reductions primarily occurred within fourth cycle. Dose reductions were observed in 77.4%, 69.2% and 56.4% of patients in groups A, B, and C, respectively ( p  = 0.08). In patients ≥ 75 years, 26 (66.7%) discontinued treatment due to disease progression (48.7%) or toxicity (17.9%). There were no significant differences in common or grade ≥ 3 adverse events between groups. Progression-free survival was 12 months (95%CI: 2.0–25.0) for group A, 29 months (95%CI: 11.0–52.0) for group B, and 16 months (95%CI: 1.0–31.0) for group C ( p  = 0.78). Conclusions Our findings suggest that niraparib is safe and well-tolerated in aged ≥ 75 years. Concerns about toxicity should not preclude the enrollment of elderly patients in treatment regiments.

Focus on Trabectedin in Ovarian Cancer: What Do We Still Need to Know?

In the era of single and combination maintenance therapies as well as platinum and Poly (ADP-ribose) polymerase inhibitors (PARPi) resistance, the choice of subsequent treatments following first-line platinum-based chemotherapy in recurrent ovarian cancer (ROC) patients has become increasingly complex. Within the ovarian cancer treatment algorithm, particularly in the emerging context of PARPi resistance, the role of trabectedin, in combination with pegylated liposomal doxorubicin (PLD) still preserves its significance. This paper offers valuable insights into the multifaceted role and mechanism of action of trabectedin in ROC. The main results of clinical trials and studies involving trabectedin/PLD, along with hints of Breast Cancer genes (BRCA)-mutated and BRCAness phenotype cases, are critically discussed. Moreover, this review provides and contextualizes potential scenarios of administering trabectedin in combination with PLD in ROC, according to established guidelines and beyond.

Effects of niraparib dose reduction on short-term outcomes in ovarian cancer patients

Despite the individualized starting dose for maintenance therapy in ovarian cancer, the niraparib dose reduction rate remains high. The aim of this study was to evaluate the impact of niraparib dose reduction on progression-free survival in newly diagnosed primary advanced ovarian cancer and recurrent ovarian cancer patients. We also aimed to compare the reduction rates and the safety of niraparib on primary and relapse groups, and identify which factors may predict dose reduction. Patients with primary or recurrent ovarian cancer in maintenance who received niraparib between 2019 and 2022 were retrospectively evaluated. Niraparib dosing was based on individualized starting dose of 300 or 200 mg/day. The impact of niraparib dose reductions was focused on patients treated with 200 or 100 mg in both groups. Reduction rates, adverse events and predictive factors of reduction were assessed in each study group. The primary endpoint was progression-free survival in primary and relapse groups; the secondary endpoints were the reduction rates, the safety and tolerability of niraparib in both groups. Of 215 patients identified, 124 (57.7%) primary and 91 (42.3%) recurrent ovarian cancer patients were included. The majority of patients started niraparib at 200 mg/day (92.7% primary and 80.2% relapse group); dose reductions from 300 or 200 mg/day to 200 or 100 mg/day occurred more frequently within cycles 1-3 (67% primary and 45% relapse group, p=0.001). Grade≥3 adverse events were lower in the relapse group (54.8% primary and 35.1% relapse, p=0.001). In both groups, dose modifications over the treatment did not significantly impair median progression-free survival. Univariate and multivariate analysis demonstrated that weight and platinum-doublets were possible risk factors for dose reduction. Niraparib dose reduction occurs in almost half of patients within cycles 1-3, although it is significantly more common in the first-line setting. Survival outcomes seem not to be impaired by dose reduction.

Risk of Breast Cancer After Ovarian Cancer in Women With a Pathogenic/Likely Pathogenic Variant in BRCA1 or BRCA2

PURPOSE BRCA carriers face high risks of developing both breast and ovarian/fallopian tube cancers (hereafter referred to as ovarian ). Among BRCA carriers with ovarian cancer, it is not clear whether the risk of breast cancer is sufficiently high that risk-reducing mastectomy should be offered. This study aimed to assess the risk of breast cancer BRCA carriers after a diagnosis of ovarian cancer. METHODS We included women with a pathogenic/likely pathogenic variant in BRCA1 or BRCA2 , a diagnosis of ovarian cancer, and no other cancer history and no risk-reducing bilateral mastectomy. Women were followed for incident breast cancer from the date of ovarian cancer diagnosis or the date of baseline questionnaire, whichever came last. The 5-, 10-, and 15-year cumulative risks of breast cancer were compared for women with ovarian cancer and an age-matched set of control women without ovarian cancer. RESULTS A total of 960 participants with ovarian cancer were identified (814 BRCA1 and 146 BRCA2 carriers). After a mean follow-up of 4.9 years, 41 women (4.3%) developed breast cancer, at a mean age at diagnosis of 57.5 years (range, 39-74). Actuarial cumulative breast cancer risks after ovarian cancer were 4.4%, 8.9%, and 11.5% at 5, 10, and 15 years, respectively. Only three breast cancer–related deaths occurred. Among 741 age-matched BRCA carriers without ovarian cancer, actuarial cumulative risks of breast cancer were 20.9%, 38.6%, and 47.2% at 5, 10, and 15 years, respectively. The hazard ratio for breast cancer, after an ovarian cancer diagnosis, compared with no ovarian cancer, was 0.18 ([95% CI, 0.12 to 0.27]; P < .0001). CONCLUSION After ovarian cancer, BRCA carriers have a relatively low risk of breast cancer. Risk-reducing mastectomy should not be recommended routinely, but might be considered for long-term survivors. Magnetic resonance imaging surveillance and/or mammography is a realistic alternative.

Olaparib dose reduction in BRCA-mutated platinum-sensitive ovarian cancer recurrence: real-world data.

The poly (adenosine diphosphate-ribose) polymerase inhibitor olaparib has demonstrated significant efficacy in treating patients with BRCA-mutated patients with ovarian cancer. However, adverse events, particularly hematologic toxicities, often necessitate dose reduction or treatment interruption. Our study investigates the survival outcomes associated with olaparib dose reduction in patients with recurrent ovarian cancer in a real-world setting. We conducted a retrospective analysis on patients with BRCA-mutated ovarian cancer treated with olaparib in a recurrent setting from 2019 to 2022. Patients were categorized based on dose-reduction status: no reduction (olaparib 600 mg; group 1), dose reduction level 1 (olaparib 500 mg; group 2), and dose reduction level 2 (olaparib 400 mg; group 3). These dose levels were selected by current guideline-based protocols for olaparib dose modification. Primary endpoints were progression-free survival and overall survival, while secondary endpoints included comparing the reduction rates and safety between the 3 groups. Eighty-seven patients were included, with 45 (52%) receiving dose reduction. The median progression-free survival for patients on standard dose was 27 months, compared to 28 and 32 months for groups 2 and 3, respectively (HR 1.587, 95% CI 0.673 to 2.744, p = .323). The median overall survival was 44 months for group 1, 52 for group 2, and 43 for group 3 (HR 0.737, 95% CI 0.413 to 1.317, p = .296). Grade ≥3 adverse events occurred in 2 patients (4.7%) of group 1, leading to a dose interruption without a reduction. Fatigue (n = 15; 35.7%) and nausea (n = 14; 33.3%) have often been reported in patients on the standard dose group. In our cohort, olaparib dose reduction did not adversely affect oncological outcomes in patients with recurrent ovarian cancer. These results suggest that a reduced dosing strategy is a viable option in patients experiencing treatment-related adverse events. However, these findings should be confirmed in larger clinical data.