Análise do aparelho mucociliar e das propriedades reológicas do muco respiratório em portadores de câncer pulmonar e extra-pulmonar / Analysis of the respiratory mucus properties in cancer patients concerning the primary site of the disease: pulmonary or extra pulmonary tumors

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

Previous study (Zayas 1990) has suggested the existence of a better transportability by cilia in respiratory mucus of smoking patients who did not present lung cancer in comparison to lung cancer patients smoking similar packages/year. Our aim was to verify this hypothesis. We studied 16 smoking patients with lung cancer (mean packages/year = 58,78), 16 smoking patients with extra pulmonary cancer (esophagus and head and neck), (mean packages/year = 53,87), and 11 non-smoking patients (metastasis) that underwent diagnostic bronchoscopy. Respiratory mucus was collected during bronchoscopy, using a small catheter passed through the aspiration channel of the bronchoscope. Mucus transportability in frog palate, contact angle (wettability), transportability by cough and viscosity (cone-plate) as well as morphological analysis the respiratory epithelium were performed. No statistical differences were found between smoking patients (lung and extra pulmonary cancer) in the mucus parameters studied. In the same way, no difference was found in the analysis of mucus samples collected from the tumor side compared to contra lateral samples. Nevertheless, statistical difference between Smoking (Lung Cancer and Extra-Pulmonary Cancer) and non Smoking (metastasis Pulmononary) for valous Clearance by cough (p = 0,018), viscosity 10rpm (p=0,021) FEV 1 (L) (p= 0,028) and FEV1 (%) (p=0,042) and statistical difference for correlation between smoking history and age (p=0,038) and viscosity 10 rpm (p= 0,029). The analysis histological of the 10 smoking, observed 60% of cases with alteration histological (30% with squamous metaplasia; 20% with hyperplasia and 10% with epithelium with cilia absence) and 15 non smoking presented 40% of cases with alteration histological (205 with squamous metaplasia in patients with lung cancer or exra-pulmonary cancer. We conclude that there is no difference between the physical properties of the respiratory mucus of smokers with lung cancer and extra-pulmonary cancer with similar packages/year and that changes in physical properties of respiratory mucus and morphological changes, due to more exposure to the dose-time of cigarette smoke in the respiratory epithelium

ASSUNTO(S)

clearance mucociliar mucociliary clearance câncer pulmonar cilia cílio lung cancer respiratory mucus smoking tabagismo muco respiratório

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