Eribulin-trastuzumab combination in HER2-positive metastatic breast cancer: updated results from a Russian observational study

Introduction. The standard of 1st line treatment of HER2+ metastatic breast cancer (mBC) is double blockade with trastuzumab and pertuzumab + taxane, 2nd line – Trastuzumab-emtazine. There are no standards for further treatment, as well as the optimal drug sequence. Expansion of the arsenal of therapeutic possibilities and the use of new combinations will certainly improve the results of treatment of this category of patients and increase their life expectancy.Aim. We sought to describe treatment patterns of  eribulin  and clinical outcomes of  metastatic HER2-positive breast cancer treated with eribulin  plus trastuzumab combination in  academic institutions and community oncology practices across the Russian Federation.Materials and methods. Patients treated with eribulin anytime between Jan, 2014 and Sep, 2019 with a diagnosis of MBC were identified by 23 providers from Russia. Providers retrospectively reviewed the health records and abstracted selected data points into an electronic case report form for each eligible patient.Results. 100 HER2-positive pts received eribulin in combination with trastuzumab. Median age was 55 (31–80) yrs and ECOG status 0–3. 67% pts had visceral metastases. Eribulin was administered as 1st and 2nd line to 23 (23%) pts, 3rd line to 31 (31%) pts, 4th line and later to 46 (46%). Median number of cycles was 5 (2–27). ORR was 12%, SD – 72%, SD > 6 months – 23%, PD – 16%. Clinical efficacy rate achieved in 35%. Median PFS was 5.07 months (95% CI 4.021–6.119). According to the ER-status the response to eribulin and trastuzumab was different. ORR was 18.8%, SD 72.9% in pts with ER-positive MBC (n = 48) and 5.8% and 71.2% respectively in ER-negative MBC (n = 52). Median PFS was 6.97 months (95% CI 3.924–10.016) in pts with ER-positive MBC and 4.67 months (95% CI 3.841–5.499) in ER-negative MBC (р = 0.3). The combination was well tolerated: dose reductions were required in 12% pts, withdrawal due to toxicity in 4% pts. The most common type of toxicity was hematological with neutropenia Gr III-IV in 14 (14%) pts. Peripheral neuropathy Gr III was observed in 5 (5%) pts. No cardiotoxicity was detected.Conclusions. This is the real-life data of clinical outcomes for patients receiving eribulin plus trastuzumab for HER2-positive MBC throughout the Russian Federation. Our experience with eribulin plus trastuzumab demonstrates that this combination may be a potential effective treatment option for HER-2 positive MBC patients

ЭФФЕКТИВНОСТЬ ПОДДЕРЖИВАЮЩЕЙ ТЕРАПИИ ПОСЛЕ ОКОНЧАНИЯ ПЕРВОЙ ЛИНИИ ЛЕЧЕНИЯ БОЛЬНЫХ МЕТАСТАТИЧЕСКИМ РАКОМ ТОЛСТОЙ КИШКИ – РЕЗУЛЬТАТЫ ПОПУЛЯЦИОННОГО ИССЛЕДОВАНИЯ

Aim. To evaluate the effectiveness of different regimens of maintenance chemotherapy after the first line of treatment for patients with metastatic colorectal cancer.Materials and methods. We performed retrospective analyses of the data from 432 patients from 17 clinics in 14 regions of the Russian Federation who started systemic therapy for metastatic cancer in 2013. The main inclusion criterion was objective response or stabilization after the first 16 weeks of first-line therapy. Four groups of patients were compared, depending on the nature of maintenance therapy: those receiving fluoropyrimidines, a combination of fluoropyrimidines with bevacizumab, monotherapy of bevacizumab and monotherapy of anti-EGFR antibodies. The main criteria for assesment of the effectiveness of treatment were progression-free survival and overall survival. The statistical analysis was performed with the SPSS 20.0 sof tware package.Results. Maintenance therapy after completion of the first 16 weeks of the 1st line of chemotherapy was administered in 126 patients, most of them were treated with fluoropyrimidines (53.1 %). The median overall survival in the maintenance group was 27 versus 21 months in the observation group, p=0.01, HR=0.78 (95 % CI 0.6–1.02) Median progression-free survival in the maintenance group was 11 vs 7 months in the observation group (p<0.001, HR=0.6, 95 % CI 0.5–0.8). The worst results of progression-free survival were observed in the group with monotherapy of bevacizumab – median was 10 months versus 12 months in the fluoropyrimidine monotherapy group, 10 months for the combination of fluoropyrimidine with bevacizumab and 14 months for monotherapy of the anti-EGFR (p=0,9, HR=1.0, 95 % CI 0.9–1.2).Conclusions. There were no statistical differences in survival with different regimens of maintenance therapy. Monotherapy of bevacizumab in maintenance treatment was associated with the worst sur vival rates.Цель. Оценить эффективность различных режимов поддерживающей терапии после окончания первой линии лечения больных метастатическим раком толстой кишки.Материалы и методы. Проведен анализ индивидуальных карт 432 пациентов 17 клиник 14 регионов РФ, которые начали терапию по поводу метастатического рака в 2013 г. Основным критерием отбора в исследование являлось отсутствие прогрессирования в течение первых 16 нед. терапии первой линии. Проведено сравнение четырех групп пациентов в зависимости от характера поддерживающей терапии: получавших фторпиримидины, комбинацию фторпиримидинов с бевацизумабом, бевацизумаб в монорежиме и анти-EGFR антитела. Основными критериями оценки эффективности лечения считались выживаемость без прогрессирования и общая выживаемость. Статистический анализ проводился в пакете программ SPSS 20.0.Результаты. Поддерживающая терапия после завершения первой линии лечения была назначена 126 пациентам, большинству проводилась терапия фторпиримидинами (53,1 %). Медиана продолжительности жизни в группе поддерживающей терапии составила 27 мес. против 21 мес. в группе наблюдения (р=0,01, ОР=0,78, 95 % ДИ 0,6–1,02). Медиана выживаемости без прогрессирования – 11 против 7 мес. (p<0,001, ОР=0,6, 95 % ДИ 0,5–0,8). Наихудшие результаты выживаемости без прогрессирования наблюдались в группе поддерживающего лечения мототерапии бевацизумабом: медиана 10 мес. против 12 мес. в группе монотерапии фторпиримидинами, 10 мес. в группе комбинации фторпиримидинов с бевацизумабом и 14 мес. в группе монотерапии анти-EGFR антителами (р=0,9, ОР=1,0, 95 % ДИ 0,9–1,2).Выводы. Не получено статистических различий в выживаемости при применении различных режимов поддерживающей терапии. Монотерапия бевацизумабом в поддерживающем лечении была ассоциирована с наименьшими показателями выживаемости пациентов

Analysis of prognostic factors for survival in the Russian population of patients with disseminated gastric cancer, who received ramucirumab as secondline therapy in the RAMSELGA trial

Background. Ramucirumab is a monoclonal antibody that inhibits the vascular endothelial growth factor receptor-2 (VEGFR2). The study is aimed to analyse prognostic factors for survival in patients with disseminated gastric cancer who received ramucirumab in the second-line therapy in ’real-life’ clinical setting of Russia (RAMSELGA). Methods. We retrospectively analysed the outcome of 163 patients aged 20–78 years from 11 oncological centres in Russia. Survival analysis was performed using the Kaplan – Meier model, and regression analysis was performed using the Cox model. Results. In a univariate analysis of overall survival, 5 factors were identified as independent factors of an unfavourable prognosis: 1) age <65 years (RR 0.542; 95% CI 0.302–0.971; p = 0.039); 2) time to tumour progression on the first-line therapy is not more than four months. (RR 0.161; 95% CI 0.105–0.246; p = 0.0000); 3) a low grade tumour or colloid cancer (RR 1,868; 95% CI 1,063–3,284; p = 0,030); 4) peritoneal metastasis (RR 1.549; 95% CI 1.026–2.339; p = 0.037); 5) ascites or pleurisy (RR 0.624; 95% CI 0.424–0.920; p = 0.017). In a multivariate analysis, favourable prognostic factors of overall survival of patients included age – 65 years or older (OS 2.288; 95% CI 1.240–4.220; p = 0.008) and time to tumour progression on the first-line therapy – more than 4 months (OS 6.650; 95% CI 4.221–10.477; p = 0.000). Conclusion. Despite an active search, prognostic factors for survival in patients that are universal for dGC have not yet been found. To build a universal prognostic model, a very thoughtful analysis considering not only clinical and laboratory, but also pathomorphological and molecular genetic characteristics is required