Economic impact of olaparib on maintenance treatment of patients with BRCA-mutation positive, platinum-sensitive relapsing high-grade serous epithelial ovarian cancer in Spain.

OBJECTIVE: To estimate the economic impact of the introduction of olaparib in  the Spanish National Health System as maintenance monotherapy in patients  with BRCA-mutation positive high-grade serous ovarian cancer. METHOD: A budget impact model was developed from the Spanish NHS perspective and a time horizon of 5 years for four treatment lines. The model included prevalent and incident patients estimated according to Spanish epidemiological data. Patients moved between treatment lines according to the progression-free survival and overall survival curves  obtained from the respective clinical trials. Only direct costs (€ 2017) were considered: pharmacological, administration, adverse effects and genetic tests. The robustness of the model was verified by a univariate  sensitivity analysis. RESULTS: The use of olaparib meant that, after 5 years, 6% fewer patients progressed to later lines compared to scenario without olaparib,  remaining longer in the second line and delaying the initiation of subsequent lines. The total estimated budgetary impact ranged between € 1.6  and € 5.4 million (1-5 years). The economic impact associated to the  introduction of olaparib is partially offset by the lower cost of chemotherapy, related adverse events, and palliative care in patients with  olaparib than in patients without it. CONCLUSIONS: Olaparib as maintenance treatment in patients with BRCA-mutation positive high-grade serous ovarian cancer increases progression-free  survival and delays the use of subsequent chemotherapy, with an budgetary  impact for the Spanish National Health System of 5.4 million euros after 5 years.

Objetivo: Estimar el impacto económico de la introducción de olaparib en el  Sistema Nacional de Salud como monoterapia de mantenimiento en pacientes  con cáncer de ovario seroso de alto grado y mutación BRCA.Método: Se desarrolló un modelo de impacto presupuestario desde la  perspectiva del Sistema Nacional de Salud y un horizonte temporal de cinco años a lo largo de cuatro líneas de tratamiento. El modelo incluye pacientes  prevalentes e incidentes estimadas a partir de datos epidemiológicos españoles.  Las pacientes se mueven entre las líneas de tratamiento en función de las curvas de supervivencia libre de progresión y supervivencia global obtenidas de los  respectivos ensayos clínicos. Solo se consideraron costes directos (€ 2017):  farmacológicos, de administración, efectos adversos y test genéticos. La  robustez del modelo se ha comprobado a través de un análisis de sensibilidad  univariante.Resultados: El uso de olaparib conllevó que, tras cinco años, un 6% menos de  pacientes progresaran a líneas posteriores, en comparación al escenario sin  olaparib, permaneciendo más tiempo en segunda línea y retrasando el inicio de  líneas subsiguientes. El impacto presupuestario total estimado osciló entre 1,6 y  5,4 millones de euros (1-5 años). Este impacto económico se ve parcialmente  compensado por los costes de la quimioterapia, el manejo de sus efectos  adversos y los cuidados paliativos, los cuales producen ahorros para el Sistema  Nacional de Salud.Conclusiones: Olaparib como tratamiento de mantenimiento en pacientes con  cáncer de ovario seroso de alto grado y mutación del gen BRCA aumenta la  supervivencia libre de progresión y retrasa la utilización de quimioterapia  posteriores, con un impacto presupuestario para el Sistema Nacional de Salud de  5,4 millones de euros tras 5 año.

Identification of genes and pathways associated with cytotoxic T lymphocyte infiltration of serous ovarian cancer.

BACKGROUND: Tumour-infiltrating lymphocytes (TILs) are predictors of disease-specific survival (DSS) in ovarian cancer. It is largely unknown what factors contribute to lymphocyte recruitment. Our aim was to evaluate genes and pathways contributing to infiltration of cytotoxic T lymphocytes (CTLs) in advanced-stage serous ovarian cancer. METHODS: For this study global gene expression was compared between low TIL (n=25) and high TIL tumours (n=24). The differences in gene expression were evaluated using parametric T-testing. Selectively enriched biological pathways were identified with gene set enrichment analysis. Prognostic influence was validated in 157 late-stage serous ovarian cancer patients. Using immunohistochemistry, association of selected genes from identified pathways with CTL was validated. RESULTS: The presence of CTL was associated with 320 genes and 23 pathways (P<0.05). In addition, 54 genes and 8 pathways were also associated with DSS in our validation cohort. Immunohistochemical evaluation showed strong correlations between MHC class I and II membrane expression, parts of the antigen processing and presentation pathway, and CTL recruitment. CONCLUSION: Gene expression profiling and pathway analyses are valuable tools to obtain more understanding of tumour characteristics influencing lymphocyte recruitment in advanced-stage serous ovarian cancer. Identified genes and pathways need to be further investigated for suitability as therapeutic targets.