Evaluation of the effectiveness of the use of endobronchial ultrasound guided transbronchial needle aspiration (EBUS-TBNA) for the identification of chemo-resistance markers through genomic investigation in patients with non-small cell lung cancer (NSCLC)

Introduction Novel cancer biomarkers like microRNA (miRNA) are promising tools to gain a better understanding of lung cancer pathology and yield important information to guide therapy. In recent years, new less invasive methods for the diagnosis and staging of NSCLC have become key tools in thoracic oncology and the worldwide spread of endobronchial ultrasound transbronchial needle aspiration (EBUS-TBNA). However, appropriate specimen handling is mandatory to achieve adequate results and reproducibility. The aim of this single centre prospective study was to evaluate the feasibility of a complete miRNA expression profile in fresh NSCLC cell lines obtained by EBUS-TBNA. Methods Patients with proven NSCLC underwent EBUS-TBNA for the diagnosis of suspect lymph node metastasis, and cytological specimens were collected for epithelial cell culture and miRNA expression analysis. To validate the miRNA expression profile, we compared the results from EBUS-TBNA NSCLC specimens with those obtained from FFPE mediastinocopy specimens. Results Analysis of the miRNA expression profiles of three independent EBUS-TBNA-derived primary cell lines allowed the screening of 377 different human miRNAs. One hundred and fifty miRNAs were detected in all cell lines. Analysis of the miRNA expression profile in mediastinoscopy specimens showed a strong similarity in the clusters analysed. Conclusions The MiRNA expression profile is feasible and reliable in EBUS-TBNA specimens. Validation of this protocol in fresh cytological specimens represents an effective and reproducible method to correlate translational and clinical research

Cumulative organ damage evaluation using the SLICC/ACR-DI in brazilian patients with systemic lupus erythematosus

OBJECTIVE: to evaluate the frequency and the different types of organ damage in relation to disease duration in Brazilian patients with SLE followed in a tertiary reference center through the application of the SLICC/ACR-DI. METHODS: sixty SLE patients were enrolled in this study, and relevant data were obtained through medical history, physical and laboratory examinations reviewing the hospital records. The frequency and different types of organ damage were determined using the SLICC/ACR-DI. Statistics were performed through qui-square and t-tests. Multivariate regression was used to correlate damage with disease duration. RESULTS: forty-one patients (68.3%) presented some cumulative organ damage. Non-caucasoid patients and patients with longer disease duration had a slight tendency to have more damage (p = 0.058). Skin (35.0%), neuropsychiatric (18.3%), ocular (15.0%), peripheral vascularization (16.6%) and cardiovascular (10.0%) systems were more frequently affected. Patients with more than 60 months of disease had a slight tendency to present greater ocular, neuropsychiatric, renal, skin and musculoskeletal damage than patients with shorter disease duration. Patients with more than 120 months of disease had greater pulmonary, cardiovascular and peripheral vascular damage. CONCLUSIONS: in this study, 68.3% of permanent damage was observed. Skin, neuropsychiatric, ocular, peripheral vascularization and cardiovascular systems were more frequently affected. Renal and gonadal involvement was not as frequent as previously described. Non-caucasoid patients had a tendency to present higher scores, but more studies are necessary to determinate if ethnic or economic factors are involved.OBJETIVO: avaliar a freqüência e os tipos de danos permanentes com relação ao tempo da doença em pacientes brasileiros com lúpus eritematoso sistêmico (LES) de um hospital universitário, através da aplicação do índice de dano do Systemic Lupus International Collaborating Clinics/American College of Rheumatology (SLICC/ACR/DI). MÉTODOS: foram incluídos 60 pacientes neste estudo. Os dados utilizados, extraídos dos prontuários dos pacientes, foram obtidos através de anamnese, exame físico e exames complementares. A freqüência e os tipos de danos permanentes foram avaliados através do SLICC/ACR/DI. A estatística foi realizada através do teste quiquadrado e teste t. Regressão multivariada foi utilizada para correlacionar o dano com o tempo de doença. RESULTADOS: entre os 60 pacientes, 41 (68,3%) apresentaram algum tipo de dano. Houve tendência, entre os pacientes não caucasóides e com maior tempo de doença, a apresentarem mais danos (p=0,058). Os sistemas mais acometidos foram: pele (35,0%); neuropsiquiátrica (18,3%); ocular (15,0%); vascularização periférica (16,6%); e cardiovascular (10,0%). Com o aumento do tempo de doença (superior a 60 meses), houve maior tendência a danos oculares, neuropsiquiátricos, renais, musculoesquelético e da pele. Com evolução superior a 120 meses houve aumento dos danos pulmonares, cardiovasculares e aqueles relacionados com a vascularização periférica. CONCLUSÕES: observou-se 68,3% de dano permanente, havendo maior freqüência de danos relacionados com acometimentos neuropsiquiátricos, oculares, da vascularização periférica e da pele. Não se observou importante acometimento renal e gonadal, ao contrário do descrito anteriormente. Pacientes não caucasóides apresentaram tendência a maiores escores de dano. No entanto, outros estudos são necessários para se comprovar o envolvimento de fatores étnicos e/ou fatores sócioeconômicos nesse processo de dano irreversível.10911