Normal and off-normal incidence dissociative dynamics of O2(v,J) on ultrathin Cu films grown on Ru(0001)

The dissociative adsorption of molecular oxygen on metal surfaces has long been controversial, mostly due to the spin-triplet nature of its ground state, to possible non-adiabatic effects, such as an abrupt charge transfer from the metal to the molecule, or even to the role played by the surface electronic state. Here, we have studied the dissociative adsorption of O₂ on Cu_ML/Ru(0001) at normal and off-normal incidence, from thermal to super-thermal energies, using quasi-classical dynamics, in the framework of the generalized Langevin oscillator model, and density functional theory based on a multidimensional potential energy surface. Our simulations reveal a rather intriguing behavior of dissociative adsorption probabilities, which exhibit normal energy scaling at incidence energies below the reaction barriers and total energy scaling above, irrespective of the reaction channel, either direct dissociation, trapping dissociation, or molecular adsorption. We directly compare our results with existing scanning tunneling spectroscopy and microscopy measurements. From this comparison, we infer that the observed experimental behavior at thermal energies may be due to ligand and strain effects, as already found for super-thermal incidence energies.

Abstract PS4-38: Association of tumor infiltrating lymphocytes (TILs) density and PD-L1 expression with pembrolizumab (P) plus gemcitabine (Gem) efficacy in patients with HER2-negative advanced breast cancer (ABC) from the GEICAM/2015-04 (PANGEA-Breast) study

Background Immune cells (ICs) infiltration and immune checkpoints have been shown to be important for BC patients’ (pts) prognosis and response to immunotherapy. We aimed to analyze the relation between TILs prevalence and PD-L1 expression with efficacy to an immunostimulatory combination with P and Gem in ABC HER2-negative pts previously treated with ≤4 chemotherapy and/or ≥2 hormone therapy lines from the PANGEA-Breast trial (NCT03025880). Methods Pre-treatment (ttm) metastatic BC samples were assessed for TILs density [% of occupied stromal area upon H&E staining] and for PD-L1 immunohistochemistry expression using monoclonal anti-PD-L1 antibody clone 22C3 (Merck) by calculating ICs score (% of positive infiltrated ICs) and combined positive score [CPS; PD-L1 stained cells (tumor cells, lymphocytes, macrophages) divided by total viable tumor cells, multiplied by 100]. Cut-offs ≥5%, ≥10%, ≥30% were explored for TILs. PD-L1 scores were considered positive if ≥1%. Cut-offs (≥5%, ≥20%, ≥50%) were additionally assessed for PD-L1 as CPS. Logistic regression models were used to evaluate association between TILs density and PD-L1 expression with ttm efficacy in terms of Objective Response Rate [ORR; Complete + Partial Response (CR + PR)], Clinical Benefit Rate [CBR; CR + PR + Stable Disease ≥24 weeks] and Progression Free Survival (PFS), according to RECIST v1.1. Results Thirty-six pts were included, 58% had triple negative BC and 98% ECOG score ≤1. Median number of prior ttm lines was 4. ORR and CBR were 15.2% and 17%, respectively; median PFS was 3.1 months. TILs and PD-L1 were evaluated in 30 and 29 pts, respectively. No association was found between TILs density and ttm efficacy in terms of ORR, CBR and PFS. Analysis of PD-L1 ICs score did not reveal any significant association with ORR, CBR or PFS. However, pts with negative PD-L1 expression by CPS (<1%) had a significantly prolonged PFS [p-value=0.031; HR 0.39 (95%CI 0.16; 0.95)], not maintained at CPS <20% cut-off [p-value=0.062; HR 0.42 (95%CI 0.17; 1.08)]. Conclusions Our findings support that: 1) P plus Gem ttm in heavily pre-treated HER2-negative ABC pts obtains a modest ORR of 15.2%; 2) TILs density and PD-L1 expression in ICs does not predict its benefit; 3) PD-L1 in tumor cells scored as CPS impacts in worse outcome (PFS) but not in ORR, suggesting an eventual prognostic role in this population; 4) no long-term responders were observed with P plus Gem in this trial.

Citation Format: Luis De la Cruz, María Gion, Josefina Cruz, Jose Luis Alonso, Vanesa Quiroga, Fernando Moreno, Marta Santisteban, Raquel Andrés, Esther Holgado, Natalia Palazón, Luz Milva Rodríguez, Asunción Soto, Javier Cortés, Alfonso Cortés, Manuel Ramos, Maribel Casas, Massimo Chiesa, Susana Bezares, Rosalía Caballero, Federico Rojo. Association of tumor infiltrating lymphocytes (TILs) density and PD-L1 expression with pembrolizumab (P) plus gemcitabine (Gem) efficacy in patients with HER2-negative advanced breast cancer (ABC) from the GEICAM/2015-04 (PANGEA-Breast) study [abstract]. In: Proceedings of the 2020 San Antonio Breast Cancer Virtual Symposium; 2020 Dec 8-11; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2021;81(4 Suppl):Abstract nr PS4-38.

Abstract PS14-01: Radium-223 in women with HR-positive bone-metastatic breast cancer receiving endocrine therapy: International phase 2, randomized, double-blind, placebo-controlled trial

Background: Approximately 65-75% of women with metastatic breast cancer (mBC) have skeletal involvement, which can result in bone pain, pathologic fractures, and spinal-cord compression (SCC), impairing quality of life and function. Radium-223 dichloride (Ra-223) is a targeted alpha-emitting radionucleotide therapy that is approved for treatment of bone metastases from castration-resistant prostate cancer, but has been little studied in mBC. Objective: To assess the efficacy and safety of Ra-223 in women with bone-metastatic hormone receptor (HR)-positive breast cancer receiving endocrine monotherapy. Methods: This international, phase 2, randomized, double-blind, placebo-controlled trial (NCT02258464) involved women ≥18 years with HER2-negative, HR-positive, bone-dominant (≥2 skeletal lesions) mBC. Women with 1-2 skeletal-related events before study entry, treated with ≥1 line of hormonal therapy in the metastatic setting and bone-supportive agents, were randomized 1:1 to receive Ra-223 55 kBq/kg or placebo intravenously every 4 weeks for up to 6 cycles, combined with local standard of practice endocrine monotherapy and bone-targeted therapy with denosumab or a bisphosphonate. The primary endpoint was symptomatic skeletal event-free survival (SSE-FS). SSE was defined as external beam radiotherapy to relieve skeletal symptoms, symptomatic pathologic fractures, SCC, cancer-related orthopedic surgery, or death from any cause. Secondary endpoints included overall survival (OS), radiologic progression-free survival (rPFS), pain measurements, and safety. Results: Considering the evolving treatment landscape and slow recruitment, enrollment was closed early, and patients who completed treatment were permitted to roll over early to a follow-up study. Of the planned 227 women, 99 were randomized (Ra-223 n=49, placebo n=50; median age 57 years, range 28-85 years; 89% postmenopausal). The median number of injections received was 6 (range 1-6) in both arms. Median SSE-FS was 30 months (80% confidence interval [CI] 22, 43) in the Ra-223 arm vs 18 months (80% CI 9, 28) in the placebo arm; hazard ratio 0.75 (95% CI 0.41, 1.36; P=0.334). Trends in favor of Ra-223 over placebo were found for OS and pain measurements (Table). Treatment-emergent adverse events (TEAEs) occurred in 96% of patients in the Ra-223 arm and 94% in the placebo arm; drug-related TEAEs occurred in 44% and 33% of patients, respectively, and grade 3/4 TEAEs in 31% and 39%, respectively. In the Ra-223 vs placebo arms, there were fewer serious TEAEs (6% vs 25%, respectively, most commonly bone pain), bone-associated TEAEs (21% vs 27%, respectively; fracture 4% vs 12%, respectively), and TEAEs leading to treatment discontinuation (2% vs 6%, respectively). Conclusion: Although the primary endpoint was not met, possibly because of the small sample size, early discontinuation of follow-up, and lower than anticipated event rates, numerical trends consistently favored Ra-223 over placebo for SSE-FS, OS, and bone pain measurements. The overall TEAE rate was similar in both arms, but fewer serious or severe TEAEs were observed with Ra-223 than placebo.

Efficacy endpoints with Ra-223 vs placebo in women with mBC on background hormone monotherapyRadium-223 (n=49)Placebo (n=50)Difference between treatment armsSSE-FS,* median (80% CI), months30.1 (21.8; 43.0)18.4 (9.1; 28.2)HR 0.745 95% CI 0.409, 1.356, P=0.3339†SSE, n (%)Overall13 (26.5)18 (36.0)External-beam radiotherapy13 (26.5)15 (30.0)Spinal-cord compression1 (2.0)1 (2.0)Symptomatic pathologic bone fracture5 (10.2)8 (16.0)Tumor-related orthopedic surgical intervention2 (4.1)4 (8.0)OS, median (80% CI), months43.0 (22.9; NE)32.4 (23.7; NE)HR 0.888 95% CI 0.458, 1.724, P=0.7259†rPFS, median (80% CI), months8.1 (5.7; 10.6)5.8 (5.1; 7.9)HR 1.02395% CI 0.640, 1.637, P=0.9227†Time to opiate use for cancer pain, median (80% CI), months21.3 (8.3; NE)20.2 (8.8; NE)HR 0.932 95% CI 0.374, 2.323, P=0.8785†Time to pain progression, median (80% CI), months14.8 (5.9; 21.3)8.8 (3.7; 14.3)HR 0.824 95% CI 0.452, 1.502, P=0.5240†Pain improvement rate, % (n/N evaluable)¶37.5 (12/32)25.7 (9/35)P=0.345‡Time to cytotoxic chemotherapy, median (80% CI), months16.0 (14.1; 22.4)17.3 (10.9; 27.6)HR 0.968 95% CI 0.535, 1.750, P=0.9128†*Primary endpoint. †Two-sided P-value, log-rank test, stratified by geographic region, prior lines of hormone therapy in the metastatic setting, and prior skeletal-related events). ‡Cochran–Mantel–Haenszel test (same strata). ¶Confirmed pain improvement was defined as a 2-point decrease in worst pain score from baseline over two consecutive assessment periods conducted at least 4 weeks apart, without an increase in pain management in patients with a worst pain score ≥2 at baseline.CI, confidence interval; HR, hazard ratio; NE, not estimable; OS, overall survival; rPFS, radiologic progression-free survival; SSE, symptomatic skeletal events, SSE-FS, symptomatic skeletal event-free survival.

Citation Format: Robert E. Coleman, Georgeta Fried, Sung-Bae Kim, Iryna Kuchuk, David Kiesl, Manuel Ramos, Joohyuk Sohn, Jonathan Siegel, Rui Li, Deise Uema, Volker Wagner, Hope S. Rugo. Radium-223 in women with HR-positive bone-metastatic breast cancer receiving endocrine therapy: International phase 2, randomized, double-blind, placebo-controlled trial [abstract]. In: Proceedings of the 2020 San Antonio Breast Cancer Virtual Symposium; 2020 Dec 8-11; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2021;81(4 Suppl):Abstract nr PS14-01.

Directly Exploring the Neural Correlates of Feedback-Related Reward Saliency and Valence During Real-Time fMRI-Based Neurofeedback

Introduction: The potential therapeutic efficacy of real-time fMRI Neurofeedback has received increasing attention in a variety of psychological and neurological disorders and as a tool to probe cognition. Despite its growing popularity, the success rate varies significantly, and the underlying neural mechanisms are still a matter of debate. The question whether an individually tailored framework positively influences neurofeedback success remains largely unexplored.

Methods: To address this question, participants were trained to modulate the activity of a target brain region, the visual motion area hMT+/V5, based on the performance of three imagery tasks with increasing complexity: imagery of a static dot, imagery of a moving dot with two and with four opposite directions. Participants received auditory feedback in the form of vocalizations with either negative, neutral or positive valence. The modulation thresholds were defined for each participant according to the maximum BOLD signal change of their target region during the localizer run.

Results: We found that 4 out of 10 participants were able to modulate brain activity in this region-of-interest during neurofeedback training. This rate of success (40%) is consistent with the neurofeedback literature. Whole-brain analysis revealed the recruitment of specific cortical regions involved in cognitive control, reward monitoring, and feedback processing during neurofeedback training. Individually tailored feedback thresholds did not correlate with the success level. We found region-dependent neuromodulation profiles associated with task complexity and feedback valence.

Discussion: Findings support the strategic role of task complexity and feedback valence on the modulation of the network nodes involved in monitoring and feedback control, key variables in neurofeedback frameworks optimization. Considering the elaborate design, the small sample size here tested (N = 10) impairs external validity in comparison to our previous studies. Future work will address this limitation. Ultimately, our results contribute to the discussion of individually tailored solutions, and justify further investigation concerning volitional control over brain activity.

The Mars Environmental Dynamics Analyzer, MEDA. A Suite of Environmental Sensors for the Mars 2020 Mission

NASA's Mars 2020 (M2020) rover mission includes a suite of sensors to monitor current environmental conditions near the surface of Mars and to constrain bulk aerosol properties from changes in atmospheric radiation at the surface. The Mars Environmental Dynamics Analyzer (MEDA) consists of a set of meteorological sensors including wind sensor, a barometer, a relative humidity sensor, a set of 5 thermocouples to measure atmospheric temperature at ∼1.5 m and ∼0.5 m above the surface, a set of thermopiles to characterize the thermal IR brightness temperatures of the surface and the lower atmosphere. MEDA adds a radiation and dust sensor to monitor the optical atmospheric properties that can be used to infer bulk aerosol physical properties such as particle size distribution, non-sphericity, and concentration. The MEDA package and its scientific purpose are described in this document as well as how it responded to the calibration tests and how it helps prepare for the human exploration of Mars. A comparison is also presented to previous environmental monitoring payloads landed on Mars on the Viking, Pathfinder, Phoenix, MSL, and InSight spacecraft.

Palbociclib in combination with endocrine therapy versus capecitabine in hormonal receptor-positive, human epidermal growth factor 2-negative, aromatase inhibitor-resistant metastatic breast cancer: a phase III randomised controlled trial-PEARL

BACKGROUND

Palbociclib plus endocrine therapy (ET) is the standard treatment of hormone receptor-positive and human epidermal growth factor receptor 2-negative, metastatic breast cancer (MBC). However, its efficacy has not been compared with that of chemotherapy in a phase III trial.

PATIENTS AND METHODS

PEARL is a multicentre, phase III randomised study in which patients with aromatase inhibitor (AI)-resistant MBC were included in two consecutive cohorts. In cohort 1, patients were randomised 1 : 1 to palbociclib plus exemestane or capecitabine. On discovering new evidence about estrogen receptor-1 (ESR1) mutations inducing resistance to AIs, the trial was amended to include cohort 2, in which patients were randomised 1 : 1 between palbociclib plus fulvestrant and capecitabine. The stratification criteria were disease site, prior sensitivity to ET, prior chemotherapy for MBC, and country of origin. Co-primary endpoints were progression-free survival (PFS) in cohort 2 and in wild-type ESR1 patients (cohort 1 + cohort 2). ESR1 hotspot mutations were analysed in baseline circulating tumour DNA.

RESULTS

From March 2014 to July 2018, 296 and 305 patients were included in cohort 1 and cohort 2, respectively. Palbociclib plus ET was not superior to capecitabine in both cohort 2 [median PFS: 7.5 versus 10.0 months; adjusted hazard ratio (aHR): 1.13; 95% confidence interval (CI): 0.85-1.50] and wild-type ESR1 patients (median PFS: 8.0 versus 10.6 months; aHR: 1.11; 95% CI: 0.87-1.41). The most frequent grade 3-4 toxicities with palbociclib plus exemestane, palbociclib plus fulvestrant and capecitabine, respectively, were neutropenia (57.4%, 55.7% and 5.5%), hand/foot syndrome (0%, 0% and 23.5%), and diarrhoea (1.3%, 1.3% and 7.6%). Palbociclib plus ET offered better quality of life (aHR for time to deterioration of global health status: 0.67; 95% CI: 0.53-0.85).

CONCLUSIONS

There was no statistical superiority of palbociclib plus ET over capecitabine with respect to PFS in MBC patients resistant to AIs. Palbociclib plus ET showed a better safety profile and improved quality of life.

Shrinking Lung Syndrome: A Rare Manifestation of Systemic Lupus Erythematosus

Shrinking lung syndrome (SLS) is a pulmonary complication of systemic lupus erythematosus (SLE) characterized by dyspnea, pleuritic chest pain, and progressive decrease in lung volumes with no evidence of pleural or interstitial disease on chest CT. We present a 51-year-old female with a 14-year history of SLE with symptoms of progressive shortness of breath, pleuritic chest pains, low grade fevers, and productive cough which was unresponsive to multiple courses of antibiotics. After careful review of her course of SLE and timeline of symptoms, she was diagnosed with SLS. Even though rare, clinicians should have a high suspicion of SLS in patients with a long-term history of SLE and worsening dyspnea. Early treatment can be initiated to help reduce long-term morbidity and mortality and maintain the quality of life.

Cultural competency training in psychiatry

Recent reports indicate that the quality of care provided to immigrant and ethnic minority patients is not at the same level as that provided to majority group patients. Although the European Board of Medical Specialists recognizes awareness of cultural issues as a core component of the psychiatry specialization, few medical schools provide training in cultural issues. Cultural competence represents a comprehensive response to the mental health care needs of immigrant and ethnic minority patients. Cultural competence training involves the development of knowledge, skills, and attitudes that can improve the effectiveness of psychiatric treatment. Cognitive cultural competence involves awareness of the various ways in which culture, immigration status, and race impact psychosocial development, psychopathology, and therapeutic transactions. Technical cultural competence involves the application of cognitive cultural competence, and requires proficiency in intercultural communication, the capacity to develop a therapeutic relationship with a culturally different patient, and the ability to adapt diagnosis and treatment in response to cultural difference. Perhaps the greatest challenge in cultural competence training involves the development of attitudinal competence inasmuch as it requires exploration of cultural and racial preconceptions. Although research is in its infancy, there are increasing indications that cultural competence can improve key aspects of the psychiatric treatment of immigrant and minority group patients.

Endogenous TAP-independent MHC-I antigen presentation: not just the ER lumen

Altered and infected cells are eliminated by CD8⁺ cytotoxic T lymphocytes. This requires production of antigenic peptides mostly in the cytosol, transport to the endoplasmic reticulum (ER) by the transporter associated with antigen processing (TAP), and cell surface presentation by major histocompatibility complex class I (MHC-I). Strikingly, antigen presentation occurs without TAP, although it is inefficient and associated to human pathology. TAP-independent peptides derive both from membrane and secreted proteins, as well as cytosolic ones. The efficiency of TAP-independent presentation may be impacted by the availability of receptive MHC-I, and in turn by the functional presence in the ER of the peptide-loading complex, itself anchored on TAP. Without TAP, surface expression of human leukocyte antigen (HLA)-B allotypes varies widely, with those presenting a broader peptide repertoire among the most TAP-independent. Much remains to be learned on the alternative cellular pathways for antigen presentation in the absence of TAP.

P225 Carcinoid heart disease: report of a case in a patients with trombocytopenia absent radius

Background

The carcinoid syndrome is characterized by extensive and several clinical manifestations. The diarrhea, the cutaneous flushing are the most frequents symptoms while cardiac manifestations (carcinoid heart disease) (CHD) occurs in a mean of 40%. Nowadays, the number of cases of CHD is lower than 20%, as a consequence of the widespread use of somatostatin analogues. At present, there is a mean delay in diagnosis of CHD of 1.5 years from the time of carcinoid syndrome detection. Hence, CHD is associated with a poor prognosis for clinical management.

Case report

We present a case of 45-years-old active woman, with Thrombocytopenia absent radius (TAR). This is characterized by a bilateral absence of the radio with the presence of both thumbs and thrombocytopenia. Our patient was attended for dyspnea of medium efforts, history of diarrhea, cutaneous flushing with tachycardia and elevated urinary 5-hydroxyindoleacetic acid (5-HIAA) (89,6 mg/24 (2,0-9,0)). The Transthoracic echocardiography showed morphologic changes that affected the tricuspid valve: diminished curvature of the leaflets, altered dynamic motion of the leaflets during diastole, fused and shortened chordae retraction and reduced excursion of the valve. A moderate to severe tricuspid regurgitation and tricuspid stenosis with gradient media de 5 mmHg was observed. In addition, the right ventricle was dilated, a severe pulmonary hypertension, a right pleural effusion and a minor pericardial effusion circumference were detected. All these findings were consistent with CHD.

Conclusions

This report describes an unusual case of CHD in TAR patient. In fact, the interest of this case is the role played by the echocardiogram in the differential diagnosis for tricuspid valve diseases. Tricuspid stenosis is an infrequent condition and it is usually related with rheumatic disease associated with mitral valve disease. Although the carcinoid syndrome is infrequent, any changes in the anatomical structure of the tricuspid valve (thickening, fibrosis and rigidity associated with stenosis and tricuspid regurgitation) should alert us to the suspicion of CHD

Abstract P225 Figure.

1094 Exercise syncope as initial symptom of constrictive pericarditis in a young patient

Introduction

Constrictive pericarditis is a form of diastolic heart failure that arises because an inelastic pericardium inhibits cardiac filling. Syncope is a rare initial symptom of constrictive pericarditis.

Clinical case

A 22-year-old man with previous medical history of viral meningitis when he was 3 months-old but without any family history of cardiac disease or sudden cardiac death, was admitted to the Emergency Department for syncope. During the last year, he had suffered several episodes of intense exercise-related syncope. The patient denied having prodromes, chest pain, palpitations or any other symptoms. The physical exam of the patient was normal with stable vital signs. Normal S1 and S2 heart sounds were present, no murmurs or gallop. There were no signs of heart failure, only a minimal jugular ingurgitation. An electrocardiogram (ECG) revealed sinus rhythm, signs of bi-atrial enlargement (prominent P-wave with P mitral morphology in DI-II leads, with enhanced negative deflection in V1), and negative asymmetric T-waves in inferior (DII-III-aVF) and V6 leads. Chest X-ray showed minimal calcium density in the inferior pericardial silhouette. The patient was admitted in the Cardiology Department for aetiological study. A transthoracic echocardiogram revealed a marked protodiastolic cleft in the interventricular septum, with 40% variations of the transmitral flow with the respiratory changes and dilation of the cava vein, with absent respiratory collapse. A marked thickening and calcification of the inferoposterior pericardium was also seen. Considering these results, the diagnosis of constrictive pericarditis was suggested (Fig. A, B, C). Blood tests for autoimmune disease screening, as well as infectious diseases, including Quantiferon test, HIV, HVC, HVB and other viral serologies were done, with negative results. A cardiac magnetic resonance was requested, which confirmed the echocardiographic findings, with bi-atrial enlargement and markedly thickened pericardium with loss of signal, suggestive of calcification. Left and right ventricle had normal dimensions and contractility. The CT coronary angiography revealed normal coronary anatomy. Extensive calcification and pericardial thickening were shown, with myocardial infiltration in the lateral-basal area (Fig D). It was considered important to rule out any additional arrhythmic aetiology of the exercise syncope. Therefore, a stress test and, an electrophysiologic study were done, both with normal results. The patient remained asymptomatic and a pericardiectomy was indicated given the severe thickening and calcification of the pericardium and frequent syncopal episodes that our patient suffered.

Conclusions

Syncope as the initial symptom in the absence of significant right heart failure signs is a very unusual form of presentation of idiopathic constrictive pericarditis given the severe thickening and calcification of the pericardium of our patient.

Abstract 1094 Figure.

P1439 Familial dilated cardiomyopathy: assessment of left ventricular systolic and diastolic function by echocardiogram in asymptomatic patients

Funding Acknowledgements

Alfonso X El Sabio University

Introduction

Familial dilated cardiomyopathy (fDCM) represents 20% to 30% of idiopathic DCM (iDCM) ethiology. The assessment of cardiac function of these patients is awfully complex. Usually, myocardial fiber damages can not be detected in the early DCM stages. In this sense echocardiogram could be useful to detect incipient changes.

Purpose

The aim of this study was to characterize the systolic function of asymptomatic fDCM, compared within iDCM and control patients.

Material and methods

This study was carried out in 33 fDCM patients. A total of 4 fDCM families with LMNA gene mutation and 3 fDCM families with BLC2-associated athanogene 3 (BAG3) mutation were recruited. Moreover, a total of 30 iDCM and 66 healthy matched controls were enrolled in the study.

Results

58.14% were male. The average age was 45.3 ± 17 years. 72% showed sinus rhythm. Left bundle branch block (LBBB) was observed in 7.8% of patients. The LV ejection fraction (LVEF), sphericity index and mitral annular plane systolic excursion (MAPSE), were significantly improved in the fDCM patients compared to iDCM subjects. However, these parameters were aggravated compared with healthy controls. LVEF was enhanced in fDCM in contrast to iDCM (56% versus 35%; P < 0.001). Nevertheless, LVEF value was deteriorated in fDCM compared to healthy controls (56% versus 65%; P < 0.001). The values of septal and lateral annulus early diastolic velocity measured by DTI, were also diminished. All results are presented in Table 1.

Conclusions

Asymptomatic fDCM shown an intermediate value of LVEF between the iDCM and the control group. This ventricular remodeling process could be the consequence of a slight increase in the end-systolic diameter.

Patients Characteristics Patients Characteristics iDCM 30 patients fDCM 33 patients Control Group 66 Healthy P LVEF 32 (29.78-40) 56.0 (39.7-64.2) 65 (62-69.5) 0.001 EDD 62.5 (59.2-65.7) 53.7 (45.7-57.6) 45.50 (43-48.8) 0.001 ESD 53 (47-58.75) 36 (30.9-54.2) 27.9 (24-31) 0.001 MAPSE 11 (10-12.50) 14 (14-18) 19 (17-20) 0.001 Sphericity index 0.70 (0.66–0.79) 0.69 (0.66-0.79) 0.53 (0.48-58) 0.001 LA volume 61.5 (57-75.1) 32 (23-46.5) 17 (14.2-20) NS Septal annulus Early diastolic Velocity (cm/s) DTI 3.5 (3-4.2) 7.5 (1.6-8.8) 9 (7.9-11) 0.001 Lateral annulus Early diastolic Velocity (cm/s) DT 7.2 (5-8.9) 9.5 (1.8-11.8) 13 (10.37-15) 0.001 Table1. Echocardiografic findings in patients. LVEF: left ventricular ejection fraction; EDD: end-diastolic diameter; ESD: end systolic diameter; MAPSE:mitral annular plane systoluc excursion; LA: left atrium; TDI: Tissue Doppler imagin.

Abstract P1439 Figure. Familial dilated cardiomyopathy

BOMET-QoL-10 questionnaire for breast cancer patients with bone metastasis: the prospective MABOMET GEICAM study

Background

Bone metastasis (BM) is the most common site of disease in metastatic breast cancer (MBC) patients. BM impacts health-related quality of life (HRQoL). We tested prospectively the psychometric properties of the Bone Metastasis Quality of Life (BOMET-QoL-10) measure on MBC patients with BM.

Methods

Patients completed the BOMET-QoL-10 questionnaire, the Visual Analogue Scale (VAS) for pain, and a self-perceived health status item at baseline and at follow-up visits. We performed psychometric tests and calculated the effect size of specific BM treatment on patients´ HRQoL.

Results

Almost 70% of the 172 patients reported symptoms, 23.3% experienced irruptive pain, and over half were receiving chemotherapy. BOMET-QoL-10 proved to be a quick assessment tool performing well in readability and completion time (about 10 min) with 0–1.2% of missing/invalid data. Although BOMET-QoL-10 scores remained fairly stable during study visits, differences were observed for patient subgroups (e.g., with or without skeletal-related events or adverse effects). Scores were significantly correlated with physician-reported patient status, patient-reported pain, symptoms, and perceived health status. BOMET-QoL-10 scores also varied prospectively according to changes in pain intensity.

Conclusions

BOMET-QoL-10 performed well as a brief, easy-to-administer, useful, and sensitive HRQoL measure for potential use for clinical practice with MBC patients.

Trial registration

NCT03847220. Retrospectively registered on clinicaltrials.gov (February the 20th 2019).

Phase III Trial of Adjuvant Capecitabine After Standard Neo-/Adjuvant Chemotherapy in Patients With Early Triple-Negative Breast Cancer (GEICAM/2003-11_CIBOMA/2004-01)

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.

Trehalose-cored amphiphiles for membrane protein stabilization: importance of the detergent micelle size in GPCR stability

Despite their importance in biology and medicinal chemistry, structural and functional studies of membrane proteins present major challenges. To study diverse membrane proteins, it is crucial to have the correct detergent to efficiently extract and stabilize the proteins from the native membranes for biochemical/biophysical downstream analyses. But many membrane proteins, particularly eukaryotic ones, are recalcitrant to stabilization and/or crystallization with currently available detergents and thus there are major efforts to develop novel detergents with enhanced properties. Here, a novel class of trehalose-cored amphiphiles are introduced, with multiple alkyl chains and carbohydrates projecting from the trehalose core unit are introduced. A few members displayed enhanced protein stabilization behavior compared to the benchmark conventional detergent, n-dodecyl-β-d-maltoside (DDM), for multiple tested membrane proteins: (i) a bacterial leucine transporter (LeuT), (ii) the R. capsulatus photosynthetic superassembly, and (iii) the human β2 adrenergic receptor (β2AR). Due to synthetic convenience and their favourable behaviors for a range of membrane proteins, these agents have potential for membrane protein research. In addition, the detergent property-efficacy relationship discussed here will guide future design of novel detergents.

Evaluation of the Assurance GDS® for Salmonella Method in Foods and Environmental Surfaces: Multilaboratory Collaborative Study

A multilaboratory collaborative study was conducted to compare the detection of Salmonella by the Assurance GDS® for Salmonella method and the Reference culture methods. Six foods, representing a variety of low microbial and high microbial load foods were analyzed. Seventeen laboratories in the United States and Canada participated in this study. No statistical differences (P < 0.05) were observed between the Assurance GDS for Salmonella and the Reference culture methods for any inoculation level of any food type or naturally contaminated food, except for pasta, for which the Assurance GDS method had a higher number of confirmed test portions for Salmonella compared to the Reference method.

Development and validation of a sexual relations satisfaction scale in patients with breast cancer - "SEXSAT-Q"

PURPOSE

Because the currently available questionnaires to evaluate sexual changes on breast cancer women only address the sexual sphere with a few questions our purpose was to develop a questionnaire that assesses changes in sexual dysfunction and satisfaction in women treated for breast cancer.

METHODS

A sample was selected of women aged between 18 and 65 who had had surgery for breast cancer, completed neoadjuvant/adjuvant chemotherapy treatment and could be receiving adjuvant hormonal treatment, with an active sex life at least 3 months before starting treatment. Metastatic disease was excluded. A questionnaire structured in 4 dimensions was developed. The MOS SF-12 and QLQ-BR23 questionnaires were also provided. The following metric properties were evaluated: item analysis; internal consistency; temporal stability; construct validity; concurrent, convergent and divergent validity; and feasibility.

RESULTS

Three samples were recruited: a pilot sample of 20; a reduction sample of 152; and a validation sample of 148. The presence of 6 dimensions was confirmed: 1) Loss of sex drive; 2) worsening of body image; 3) psychological coping; 4) discomfort during intercourse; 5) satisfaction with sexual relations; and 6) satisfaction with breast reconstruction. Good goodness-of-fit statistics were obtained (χ2/df = 1.5, GFI = 0.9, AGFI = 0.84, CFI = 0.959, RMSEA = 0.062). Reliability was good (α = 0.855), as was test-retest stability (r = 0.838). The correlation with the convergent questionnaires proved to be higher than that obtained with generic measurements.

CONCLUSIONS

We were able to develop a short questionnaire (17 items) capable of measuring sexual satisfaction in women with breast cancer with good metric properties.

Conformationally Restricted Monosaccharide-Cored Glycoside Amphiphiles: The Effect of Detergent Headgroup Variation on Membrane Protein Stability

Detergents are widely used to isolate membrane proteins from lipid bilayers, but many proteins solubilized in conventional detergents are structurally unstable. Thus, there is major interest in the development of novel amphiphiles to facilitate membrane protein research. In this study, we have designed and synthesized novel amphiphiles with a rigid scyllo-inositol core, designated scyllo-inositol glycosides (SIGs). Varying the headgroup structure allowed the preparation of three sets of SIGs that were evaluated for their effects on membrane protein stability. When tested with a few model membrane proteins, representative SIGs conferred enhanced stability to the membrane proteins compared to a gold standard conventional detergent (DDM). Of the novel amphiphiles, a SIG designated STM-12 was most effective at preserving the stability of the multiple membrane proteins tested here. In addition, a comparative study of the three sets suggests that several factors, including micelle size and alkyl chain length, need to be considered in the development of novel detergents for membrane protein research. Thus, this study not only describes new detergent tools that are potentially useful for membrane protein structural study but also introduces plausible correlations between the chemical properties of detergents and membrane protein stabilization efficacy.