Abstract Background: HER2-positive breast cancer (BC) is a heterogeneous disease from a clinical and biological perspective. Intrinsic subtype defined by gene expression has an important role in determining response to treatment, as seen in several neoadjuvant trials (e.g. CALGB40601, CherLOB, NeoALTTO and PAMELA). However, limited data exist in an off-trial setting. The objective of this study was to evaluate the association of intrinsic subtypes with pathological completed response (pCR) and survival outcomes of a series of HER2-positive patients (pts) homogeneously treated with trastuzumab-based primary chemotherapy (PC) in a single comprehensive cancer center. Methods: Clinical-pathological data were evaluated in a series of 150 consecutive stage II-IIIC (T4d included) HER2-positive BC pts treated in ICO-Hospitalet (Spain) from August-2009 to December-2012 with weekly paclitaxel x12 followed by FEC/3w x 4 and concurrent trastuzumab for a total of 24w. HER2-positivity was considered according to ASCO-CAP 2007 guidelines. pCR was defined as ypT0/isypN0. The expression of 105 BC-related genes, including the PAM50 genes, was determined in baseline and residual formalin-fixed paraffin-embedded tumor samples using the nCounter platform. Intrinsic subtypes were determined by the research-based PAM50 gene expression predictor. Association of variables with pCR or disease-free survival (DFS) was evaluated using logistic regression analyses and cox proportional hazard models.All statistical tests were two-sided and considered significant when p≤0.05. Results: Most pts had T2 (64%) and T4 (20%) tumors and clinically node-positive disease (77%). 53% had hormonal receptor (HR)+ disease. 84 of the 150pts (56%) achieved a pCR; HR-neg was associated with higher pCR rates (72.5%vs 42% in HR+ P<0.001). 90 of the 150 (60%) baseline samples were evaluated. Baseline subtype distribution: HER2-enriched (HER2-E) 63%, Luminal A 11%, Basal-like 8.9%, Normal-like 8.9% and Luminal B 7.8%. Although HER2-E predominated in HR-neg tumors (74%), 53% of HR+ tumors were HER2-E. pCR rates varied according to intrinsic subtype (P<0.001). HER2-E tumors were associated with higher pCR rates compared to non-HER2-E (68.4% vs 33.3%, P<0.001) regardless HR-status. Five of the 8 PAM50 signatures (HER2E, ROR-S, ROR-P, Basal-like and Proliferation score) were associated with pCR, whereas Luminal A was associated with no-pCR (P<0.001). With a median follow-up of 6.6 years, HER2-E subtype was associated with a better DFS compared to non-HER2-E (5-year DFS 92.4% vs 75.9%; HR= 0.27; 95% CI 0.08-0.91; P=0.034). Finally, 28 of the 66 (42.4%) surgical specimens with residual disease were studied. Residual subtype distribution was: Normal-like (50.0%), Luminal A (32.1%), HER2-E (14.3%) and Luminal B (3.5%). Conclusions: In this consecutive series of HER2-positive BCtreated homogeneously with neoadjuvant trastuzumab-based PC, all of the main intrinsic molecular subtypes were identified with a predominance of HER2-E. HER2-E was significantly associated with pCR and survival outcome. Distribution of the intrinsic subtypes in residual disease differed from untreated tumors. Citation Format: Pernas S, Petit A, Climent F, Pare L, Perez-Martin J, Ventura L, Galvan P, Falo C, Morilla I, Fernandez-Ortega A, Stradella A, Pascual T, Gil-Gil M, Prat A. PAM50 intrinsic subtyping as a predictor of pathological complete response to neoadjuvant trastuzumab-based chemotherapy in early HER2-positive breast cancer [abstract]. In: Proceedings of the 2017 San Antonio Breast Cancer Symposium; 2017 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2018;78(4 Suppl):Abstract nr P2-09-11.
Introduction: although nutritional differences between different types of texture-modified diet (TMD) have been evaluated, the resources and costs associated with their preparation have been less studied. Objective: to describe the nutritional, microbiological properties and costs of: 1) in-home produced pureed food (hTMD); 2) concentrated nutrient-dense commercial food products, hand-blended (cTMD); 3) food prepared using the MixxPro® automatic food mixer (cTMD-Mix). Methods: an observational, prospective study carried out in three geriatric nursing-homes. Patients ≥ 65 years, receiving TMD, with a stable clinical condition, estimated survival/expected internment > 1 month, and sufficient cognitive capacity were included. The following data were recorded: 1) patient socio-demographic and clinical variables; 2) TMD compliance and symptoms related to dysphagia during the meal; 3) patient appetite; and 4) kitchen information and resources used to prepare a TMD. Results: sixty-two residents were included (65.0 % women, 88.3 years (SD: 9.3); 43.5 % malnourished, 79.0 % with good appetite). The proportion of food eaten/median kcal served/portion/mean kcal consumed were: hTMD: 95.5 % (SD: 10.7)/92.4 kcal (IQR: 75.6-128.1)/88.2 kcal (IQR: 72.2-122.3); cTMD: 89.2 % (SD: 15.9)/323.4 kcal (IQR: 284.2-454.1)/288.5 kcal (IQR: 253.5-325.1); and cTMD-Mix: 80.3 % (SD: 21.4)/358.0 kcal (IQR: 344.0-372.1)/287.5 kcal (IQR: 276.5-298.8). No microorganisms were detected. The average time spent in preparing each portion and its costs were: hTMD: 11.2 min (SD: 3.89)/€2.33 (SD: 0.63); cTMD: 1.7 min (SD: 0.28)/€2.01 (SD: 0.39); and cTMD-Mix: 1.6 min (SD: 0.00)/€2.00 (SD: 0.33). Conclusions: in patients with dysphagia and/or chewing difficulties, concentrated nutrient-dense food products, particularly those produced using the MixxPro® automatic food mixer, ensure a high caloric intake and allow quick and safe food preparation.Introducción: aunque existe evidencia acerca de las diferencias nutricionales entre los distintos tipos de dieta de textura modificada (DTM), los recursos y los costos asociados a su preparación se han estudiado menos. Objetivo: describir las propiedades nutricionales, las microbiológicas y los costes de: 1) una dieta triturada de manera artesanal (hDTM); 2) una dieta preparada con alimentación básica adaptada (ABA) (cDTM); y 3) una ABA preparada con el mezclador automático de alimentos MixxPro® (cDTM-Mix). Métodos: estudio observacional prospectivo realizado en tres residencias. Se incluyeron pacientes ≥ de 65 años que recibían DTM, con estado clínico estable, con supervivencia/internamiento estimado > 1 mes y capacidad cognitiva suficiente. Se registraron: 1) las variables sociodemográficas y clínicas del paciente; 2) el cumplimiento y los síntomas relacionados con la disfagia durante la comida; 3) el apetito del paciente, y 4) la información de la cocina y los recursos utilizados para preparar la DTM. Resultados: se incluyeron 62 residentes (65,0 % mujeres, 88,3 años (SD: 9,3), 43,5 % desnutridos, 79,0 % con buen apetito). La proporción de alimentos consumidos/mediana de kcal servidas/porción/media de kcal media consumidas fueron: hDTM 95,5 % (SD: 10,7)/92,4 kcal (IQR: 75,6-128,1)/88,2 kcal (IQR: 72,2-122,3); cDTM: 89.2 % (SD: 15.9)/323,4 kcal (IQR: 284.2-454.1)/288,5 kcal (IQR: 253.5-325.1), y cDTM-Mix: 80,3 % (SD: 21.4)/358,0 kcal (IQR: 344.0-372.1)/287,5 kcal (IQR: 276.5-298.8). No se detectaron microorganismos. El tiempo medio empleado en la preparación y el coste por porción fueron: hDTM: 11,2 min (SD: 3,89)/2,33 € (SD: 0,63); cDTM: 1,7 min (SD: 0,28)/2,01 € (SD: 0,39), y cDTM-Mix: 1,6 min (SD: 0,00)/2,00 € (SD: 0,33). Conclusiones: en los pacientes con disfagia y/o dificultades para masticar, los productos de ABA comerciales, en particular los que se producen con el mezclador automático de alimentos MixxPro®, aseguran una elevada ingesta calórica y permiten una preparación rápida y segura.
13011 Background: Recurrent MG have poor prognosis and low response rates to available treatments. Following data from Vredenburg´s phase II trial (pro ASCO 2005) some centres began to treat recurrent MG with bevacizumab and irinotecan. The aim of this study is to confirm efficacy and safety of this combination in non-selected consecutive patients (pts). Methods: Data from 6 Spanish hospitals was collected retrospectively. All pts were > 18 years, had to sign an informed consent and to present: histological documented MG; progression after radiation and temozolomide; measurable disease on MRI; have received at least 3 infusions of treatment schedule: Irinotecan 125mg/m2 and bevacizumab 10 mg/kg every 2 weeks for a maximum of a year. Response rate (RR) was determinate by MRI (performed every 6 cycles) using McDonald criteria. Progression free survival (PFS) and overall survival (OS) were calculated by Kaplan Meier method. Results: From August 2006 to October 2007, 44 consecutive pts (28 Glioblastoma, 11 Anaplastic Astrocitoma & 5 Anaplastic Oligoastrocitoma) were treated with this combination. Median age: 53 years (25–73). Median number of prior chemotherapy: 2 (1–4). Six cases had received irinotecan previously. Median KPS: 70% (60–100). Median Barthel Index: 100% (55–100). 26 pts received dexamethasone with median dosage: 4 mg (1–18). 29 were taking a non enzyme-inducing antiepileptic drug. Median cycles received: 9 (4–23) Toxicity grade 3–4: Asthenia in 6 pts; thrombocytopenia 1; neutropenia 1; mucositis 2 pts; thomboembolic complications (TEC) 3 pts, skin 1, haemorrhage out of CNS 2 pts and severe cognitive impairment 4 cases. Efficacy: 25 pts had response (4 complete response); 12 pts stable disease ≥ 3 months and 7 progression as best response. RR was 56.8% (95% CI [41–71.6]) Mean follow-up: 5.8 months (1.6–16.2). Mean PFS was 7.4 months (4,6–10,1). OS was 9.8 months (6.8–12.8). Conclusion: Our experience suggests that the combination of bevacizumab plus irinotecan in recurrent MG improves the RR, PFS and OS when compared with historical figures. However, this regimen is not free of severe toxicity (TEC and severe cognitive impairment) and requires a careful selection of patients. A phase 3 trials to validate this combination is needed. Author Disclosure Employment or Leadership Consultant or Advisory Role Stock Ownership Honoraria Research Expert Testimony Other Remuneration Roche
Introduction: HER2-enriched subtype has been associated with higher response to neoadjuvant anti-HER2-based therapy across various clinical trials. However, limited data exist in real-world practice and regarding residual disease. Here, we evaluate the association of HER2-enriched with pathological response (pCR) and gene expression changes in pre- and post-treatment paired samples in HER2-positive breast cancer patients treated outside of a clinical trial. Methods: We evaluated clinical-pathological data from a consecutive series of 150 patients with stage II-IIIC HER2-positive breast cancer treated from August 2004 to December 2012 with trastuzumab-based neoadjuvant chemotherapy. Expression of 105 breast cancer-related genes, including the PAM50 genes, was determined in available pre-and post-treatment formalin-fixed paraffin-embedded tumor samples using the nCounter platform. Intrinsic molecular subtypes were determined using the research-based PAM50 predictor. Association of genomic variables with total pCR was performed. Results: The pCR rate was 53.3%, with higher pCR among hormonal receptor (HR)-negative tumors (70 vs. 39%; P < 0.001). A total of 89 baseline and 28 residual tumors were profiled, including pre- and post-treatment paired samples from 26 patients not achieving a pCR. HER2-enriched was the predominant baseline subtype not only in the overall and HR-negative cohorts (64 and 75%, respectively), but also in the HR-positive cohort (55%). HER2-enriched was associated with higher pCR rates compared to non-HER2-enriched subtypes (65 vs. 31%; OR = 4.07, 95% CI 1.65-10.61, P < 0.002) and this association was independent of HR status. In pre- and post-treatment paired samples from patients not achieving a pCR, a lower proportion of HER2-enriched and twice the number of luminal tumors were observed at baseline, and luminal A was the most frequent subtype in residual tumors. Interestingly, most (81.8%) HER2-enriched tumors changed to non-HER2-enriched, whereas most luminal A samples maintained the same subtype in residual tumors. Conclusions: Outside of a clinical trial, PAM50 HER2-enriched subtype predicts pCR beyond HR status following trastuzumab-based chemotherapy in HER2-positive disease. The clinical value of intrinsic molecular subtype in residual disease warrants further investigation.