RESUMO
OBJECTIVE: Lung cancer (LC) is diagnosed mostly in advanced, non-operable stage, with poor prognosis. The analysis of microRNAs may be a useful tool for early and non-invasive detection of cancer. Dicer and Drosha are enzymes with an essential role for microRNA biogenesis. The aim of our study was to analyze the expression of miRNA-27a-3p, miRNA-31, miRNA-182, miRNA-195 with the ability to reciprocal regulation of Dicer and Drosha expression in lung cancer patients. PATIENTS AND METHODS: The relative expression of microRNAs was detected by qPCR in plasma of 160 LC patients. The U-Mann Whitney test was used to compare the relative expression between particular groups of lung cancer patients and healthy individuals. The diagnostic value of microRNAs examination was analyzed using a receiver operating curve. RESULTS: We demonstrated that the plasma levels of miRNA-27, miRNA-31 and miRNA-182 were significantly higher and miRNA-195 significantly lower in the whole group of LC patients and in patients with early stages of NSCLC, in comparison with healthy donors. ROC analysis showed that four studied microRNAs have a potential diagnostic value for early stages of NSCLC with AUC=0.95 for miRNA-27a (94% sensitivity and 81% specificity, p=0.0001), 0.71 for miRNA-31 (73% sensitivity and 61% specificity, p=0.001) 0.77 for miRNA-182 (70% sensitivity and 79% specificity, p=0.0001) and 0.82 for miRNA-195 (74% sensitivity and 80% specificity, p=0.0001). CONCLUSIONS: We have proved that the expression of miRNA-27a-3p, miRNA-31, miRNA-182, and miRNA-195 in patients with LC is different from the expression of these molecules in healthy people. The examination of these microRNAs in plasma could be used in non-invasive lung cancer diagnosis.
Assuntos
RNA Helicases DEAD-box/genética , Neoplasias Pulmonares/diagnóstico , MicroRNAs/metabolismo , Ribonuclease III/genética , Idoso , Área Sob a Curva , RNA Helicases DEAD-box/metabolismo , Detecção Precoce de Câncer , Feminino , Regulação Neoplásica da Expressão Gênica , Humanos , Neoplasias Pulmonares/genética , Neoplasias Pulmonares/patologia , Masculino , MicroRNAs/genética , Pessoa de Meia-Idade , Curva ROC , Ribonuclease III/metabolismo , Sensibilidade e EspecificidadeRESUMO
The aim of this study was to examine the vital capacity (FVC) and forced expiratory volume in 1 s (FEV 1) in relation to the site of amyotrophic lateral sclerosis (ALS) onset and the duration of the disease. Respiratory involvement is the principal cause of death in ALS patients. The study was conducted at the Department of Neurology, University School of Medicine in Lublin. The study comprised 18 ALS patients. The average duration of ALS was 12 months. The patients were divided into two groups according to the site of ALS onset and into two groups according to the duration of the disease. FVC was significantly higher in the group of patients with a limb onset than in the group of patients with a bulbar onset of the disease. The study has shown respiratory function disturbances in ALS patients. FVC significantly depends on the site of ALS onset but not on the duration of the disease.
