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BACKGROUND: Limited data are available regarding the real-world effectiveness and safety of Cyclin Dependent Kinase 4/6 inhibitor (CDK4/6i) (palbociclib/ribociclib) just as a first-line treatment for patients with hormone receptor-positive/human epidermal growth factor receptor 2-negative (HR + /HER2â) metastatic breast cancer (MBC). OBJECTIVE: To assess whether clinical or demographic characteristics limit access to first-line CDK4/6i treatment in clinical practice in the Autonomous Community of Andalusia (Spain) between November 2017 and April 2020. In addition, effectiveness will be described in an exploratory analysis. METHODS: Physicians from 12 centers participated in selecting demographic and clinical characteristics, treatment, and outcome data from women with HR + /HER2- MBC treated with or without CDK4/6i in addition to hormonal in the first-line setting, in a 3:1 proportion. Kaplan-Meier analysis estimated progression-free rates (PFRs) and survival rates (SRs). RESULTS: A total of 212 patients were included, of whom 175 (82.5%) were in the CDK4/6i treatment group and 37 (17.5%) were in the non-CDK4/6i treatment group (control group). Patients in the CDK 4/6i treatment group were younger (p = 0.0011), the biopsies of the metastatic site at the moment of the relapse were most commonly performed (p = 0.0454), and had multiple metastatic sites (p = 0.0025). The clinical benefit rate (CBR) was 82.3% in the CDK4/6i group and 67.8% in the control group. Median time to a progression event or death (PFS) was 20.4 months (95%CI 15.6-28) in the CDK4/6i group and 12.1 months (95%CI 7.9-not reached) in the control group. CONCLUSIONS: Younger patients, biopsies of metastatic disease and with multiple metastatic sites were more frequently treated with CDK4/6i in our daily clinical practice.
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PURPOSE: HER2-targeted therapies have dramatically improved outcomes of patients with HER2-positive breast cancer (BC), as demonstrated in neoadjuvant trials. This study aims to provide real-world evidence on the use and effectiveness of combined pertuzumab, trastuzumab and chemotherapy (CT) in early-stage HER2-positive BC. METHODS: A retrospective, multicentre study was conducted on patients diagnosed with HER2-positive early BC treated with neoadjuvant pertuzumab and trastuzumab plus CT at 13 Spanish sites. The primary endpoint was pathological complete response (pCR). RESULTS: A total of 310 patients were included. Pertuzumab and trastuzumab were combined with anthracyclines and taxanes, carboplatin and docetaxel, and taxane-based CT in 77.1%, 16.5%, and 6.5% of patients, respectively. Overall, the pCR rate was 62.2%. The pCR was higher amongst patients with hormone receptor-negative tumours and with tumours expressing higher levels of Ki-67 (> 20%). After postoperative adjuvant treatment, 13.9% of patients relapsed. Those patients who did not achieve pCR, with tumours at advanced stages (III), and with node-positive disease were more likely to experience distant relapse. Median overall survival (OS) and distant disease-free survival (D-DFS) were not reached at the study end. The estimated mean OS and D-DFS times were 7.5 (95% CI 7.3-7.7) and 7.3 (95% CI 7.1-7.5) years, respectively (both were significantly longer amongst patients who achieved pCR). Grade 3-4 anti-HER2 related toxicities were reported in six (1.9%) patients. CONCLUSION: Neoadjuvant pertuzumab and trastuzumab plus CT achieve high pCR rates in real-life patients with HER2-positive early BC, showing an acceptable safety profile. Innovative adjuvant strategies are essential in patients at high risk of distant disease recurrence.
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Anticuerpos Monoclonales Humanizados , Protocolos de Quimioterapia Combinada Antineoplásica , Neoplasias de la Mama , Terapia Neoadyuvante , Receptor ErbB-2 , Trastuzumab , Humanos , Femenino , Neoplasias de la Mama/tratamiento farmacológico , Neoplasias de la Mama/patología , Neoplasias de la Mama/metabolismo , Trastuzumab/uso terapéutico , Trastuzumab/administración & dosificación , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Persona de Mediana Edad , Estudios Retrospectivos , Receptor ErbB-2/metabolismo , Anticuerpos Monoclonales Humanizados/uso terapéutico , Anticuerpos Monoclonales Humanizados/administración & dosificación , Adulto , Anciano , Carboplatino/administración & dosificación , Carboplatino/uso terapéutico , Taxoides/administración & dosificación , Taxoides/uso terapéutico , Docetaxel/administración & dosificación , Docetaxel/uso terapéutico , Estadificación de NeoplasiasRESUMEN
OBJECTIVE: The primary objective of the study is to compare the effectiveness of trastuzumab-chemotherapy with and without pertuzumab. As a secondary objective, we seek to evaluate the cardiac safety of the treatment. METHOD: Retrospective observational study including all patients treated with either pertuzumab-trastuzumab-chemotherapy (n = 10) or trastuzumab-chemotherapy (n = 13) (January 2015-December 2018) in a specialty hospital, which met the criteria established by the Commission Central for the Optimization and Harmonization of the pharmacotherapy of the Andalusian Health Service for the use of pertuzumab in neoadjuvance: HER2 positive tumor, negative hormonal receptors, with high risk of relapse (tumor > 2 cm or lymph node involvement). To assess effectiveness, the complete pathological response was used. For cardiac safety, the decrease in left ventricular ejection fraction greater than 10% was employed. RESULTS: Complete pathological response was superior in the pertuzumab group (70.0% vs. 30.8%). Cardiac safety was similar in both. CONCLUSIONS: For patients with HER2 positive tumors and negative hormonal receptors with high risk criteria that receive pertuzumab, the complete pathological response is superior, with no increase in cardiac toxicity.
Objetivo: El objetivo primario del estudio es comparar la efectividad trastuzumab-quimioterapia con y sin pertuzumab. Como objetivo secundario se busca evaluar la seguridad cardiaca del tratamiento.Método: Estudio observacional retrospectivo que incluyó todas las pacientes tratadas con pertuzumab-trastuzumab-quimioterapia (n = 10) o trastuzumab-quimioterapia (n = 13) (enero 2015-diciembre 2018) en un hospital de especialidades, que cumplían los criterios establecidos por la Comisión Central para la Optimización y Armonización de la farmacoterapia del Servicio Andaluz de Salud para uso de pertuzumab en neoadyuvancia: tumor HER2 positivo, receptores hormonales negativos, con alto riesgo de recaída (tumor > 2 cm o afectación ganglionar). Para valorar la efectividad se utilizó la respuesta completa patológica, y para la seguridad cardiaca, el descenso de la fracción de eyección del ventrículo izquierdo superior al 10%.Resultados: La respuesta completa patológica fue superior en el grupo con pertuzumab (70,0% versus 30,8%). La seguridad cardiaca fue similar en ambos.Conclusiones: Para las pacientes con tumores HER2 positivo y receptores hormonales negativos con criterios de alto riesgo que reciben pertuzumab, la respuesta completa patológica resulta superior, sin observarse incremento de la toxicidad cardiaca.
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Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Neoplasias de la Mama/tratamiento farmacológico , Trastuzumab/administración & dosificación , Trastuzumab/uso terapéutico , Adulto , Anciano , Anticuerpos Monoclonales Humanizados/administración & dosificación , Antineoplásicos/administración & dosificación , Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , Neoplasias de la Mama/genética , Femenino , Cardiopatías/inducido químicamente , Humanos , Persona de Mediana Edad , Terapia Neoadyuvante , Recurrencia Local de Neoplasia , Receptor ErbB-2/genética , Estudios Retrospectivos , Riesgo , Volumen Sistólico/efectos de los fármacos , Trastuzumab/efectos adversosRESUMEN
PURPOSE: Operable triple-negative breast cancers (TNBCs) have a higher risk of relapse than non-TNBCs with standard therapy. The GEICAM/2003-11_CIBOMA/2004-01 trial explored extended adjuvant capecitabine after completion of standard chemotherapy in patients with early TNBC. PATIENTS AND METHODS: Eligible patients were those with operable, node-positive-or node negative with tumor 1 cm or greater-TNBC, with prior anthracycline- and/or taxane-containing chemotherapy. After central confirmation of TNBC status by immunohistochemistry, patients were randomly assigned to either capecitabine or observation. Stratification factors included institution, prior taxane-based therapy, involved axillary lymph nodes, and centrally determined phenotype (basal v nonbasal, according to cytokeratins 5/6 and/or epidermal growth factor receptor positivity by immunohistochemistry). The primary objective was to compare disease-free survival (DFS) between both arms. RESULTS: Eight hundred seventy-six patients were randomly assigned to capecitabine (n = 448) or observation (n = 428). Median age was 49 years, 55.9% were lymph node negative, 73.9% had a basal phenotype, and 67.5% received previous anthracyclines plus taxanes. Median length of follow-up was 7.3 years. DFS was not significantly prolonged with capecitabine versus observation [hazard ratio (HR), 0.82; 95% CI, 0.63 to 1.06; P = .136]. In a preplanned subgroup analysis, nonbasal patients seemed to derive benefit from the addition of capecitabine with a DFS HR of 0.53 versus 0.94 in those with basal phenotype (interaction test P = .0694) and an HR for overall survival of 0.42 versus 1.23 in basal phenotype (interaction test P = .0052). Tolerance of capecitabine was as expected, with 75.2% of patients completing the planned 8 cycles. CONCLUSION: This study failed to show a statistically significant increase in DFS by adding extended capecitabine to standard chemotherapy in patients with early TNBC. In a preplanned subset analysis, patients with nonbasal phenotype seemed to obtain benefit with capecitabine, although this will require additional validation.