ABSTRACT
Las enfermedades broncopulmonares se asocian a diversos mecanismos inflamatorios de las vías aéreas. Evaluar y comprender el perfil inflamatorio de estos pacientes podría contribuir a conocer la etiología y así optimizar el tratamiento. El esputo inducido es una técnica mínimamente invasiva, por lo que su implementación resulta de interés en la práctica habitual. Aunque el estudio del esputo inducido ha demostrado utilidad y seguridad, los centros que desarrollan esta técnica en la Argentina son escasos. Con el objetivo de estandarizar el procedimiento de recolección y análisis de muestras de esputo inducido en pacientes con enfermedades inflamatorias broncopulmonares, se desarrolló esta guía consensuada por los centros con experiencia en esta técnica en nuestro país. Es nuestra intención difundir esta técnica, mínimamente invasiva, para su aplicación en servicios especializados. Esta guía de procedimientos detalla los materiales que son requeridos, los métodos y los estándares de calidad y seguridad tanto para los pacientes como para los operadores.
Bronchopulmonary diseases are associated with different inflammatory mechanisms of the airways. Assessing and understanding the inflammatory profile of these patients could contribute to the understanding of the etiology and thus optimize the treatment. Induced sputum is a minimally invasive technique, so its implementation is of interest in the usual practice. Although the studies of induced sputum have shown usefulness and safety, the centers that develop this technique in Argentina are scarce. With the aim of standardizing the procedure that includes the collection and analysis of induced sputum samples in patients with bronchopulmonary inflammatory diseases, some centers in our country with experience in this technique achieved a consensus on the development of this Guide. It is our intention to disseminate this minimally invasive technique for its application in specialized services. This procedure guide details the necessary materials and methods and quality and safety standards for both patients and operators.
Subject(s)
Sputum , Reference Standards , Asthma , Bronchial Diseases , ConsensusABSTRACT
In spite of the numerous studies on chronic obstructive pulmonary disease (COPD), the cellular and molecular basis of the disease's development remain unclear. Neutrophils and eosinophils are known to be key players in COPD. Recently, neutrophil extracellular trap cell death (NETosis), a mechanism due to decondensation and extrusion of chromatin to form extracellular traps, has been demonstrated in COPD. However, there is limited knowledge about eosinophil extracellular trap cell death (EETosis) and its role in the pathogenesis of COPD. The aim of this study was to evaluate EETosis in stable COPD. Induced sputum obtained from healthy smokers and low exacerbation risk COPD A or B group patients or high exacerbation risk COPD C or D group patients were included. Samples were examined using electron microscopy and immunofluorescence. Healthy smokers (n=10) and COPD A (n=19) group exhibited neutrophilic or paucigranulocytic phenotypes, with NETosis being absent in these patients. In contrast, COPD B (n=29), with eosinophilic or mixed phenotypes, showed EETosis and incipient NETosis. COPD C (n=18) and COPD D groups (n=13) were differentiated from low exacerbation rate-COPD group by the abundant cellular debris, with COPD C group having an eosinophilic pattern and numerous cells undergoing EETosis. A hallmark of this group was the abundant released membranes that often appeared phagocytosed by neutrophils, which coincidentally exhibited early NETosis changes. The COPD D group included patients with a neutrophilic or mixed pattern, with abundant neutrophil extracellular trap-derived material. This study is the first to demonstrate EETosis at different stages of stable COPD. The results suggest a role for eosinophils in COPD pathophysiology, especially at the beginning and during the persistence of the disease, regardless of whether the patient quit smoking, with EETosis debris probably triggering uncontrolled NETosis. The main target of these findings should be young smokers with the potential to develop COPD.
Subject(s)
Eosinophils/ultrastructure , Extracellular Traps/metabolism , Lung/ultrastructure , Neutrophils/ultrastructure , Pulmonary Disease, Chronic Obstructive/pathology , Case-Control Studies , Cell Death , Cross-Sectional Studies , Eosinophils/metabolism , Female , Fluorescent Antibody Technique , Forced Expiratory Volume , Humans , Lung/metabolism , Lung/physiopathology , Male , Microscopy, Confocal , Microscopy, Electron , Middle Aged , Neutrophils/metabolism , Pulmonary Disease, Chronic Obstructive/metabolism , Pulmonary Disease, Chronic Obstructive/physiopathology , Smoking/adverse effects , Smoking Cessation , Smoking Prevention , Sputum/cytology , Sputum/metabolism , Vital CapacityABSTRACT
El objetivo de este trabajo fue analizar el fenotipo celular en esputo de los pacientes con diagnóstico de EPOC clasificados según el diagrama A-D. Se reclutaron paciente ambos géneros, edad ≥ 60 años, ex fumadores de por lo menos 10 pack/año, con diagnóstico de EPOC en situación estable. Se los clasifico según GOLD 2011 en categorías clínicas A, B, C, D y se les analizó el patrón inflamatorio bronquial por medio de citología de esputo. Se estudiaron 85 pacientes con diagnóstico de EPOC distribuidos en categoría A (19), B (29), C (19) y D (18); la edad de estos últimos fue significativamente mayor que las del resto de los pacientes. El patrón predominante celular en esputo fue Eosinofílico (43), Neutrofílico (17), Mixto (9) y Paucigranulocítico (16). La distribución del patrón celular predominante en relación a cada grupo clínico de EPOC fue estadísticamente significativo p ≤ 0,001. El fenotipo celular Neutrofílico en el grupo A; eosinofílico y mixto en los grupos B y C y en el grupo D, aun presentes los eosinófilos predominó el patrón Neutrofílico. Concluimos que este estudio identificó patrones celulares inflamatorios que caracterizan cada grupo del diagrama A-D de la EPOC lo cual puede contribuir a explicar su carácter heterogéneo, personalizar el tratamiento y especialmente apunta a identificar tempranamente el paciente en riesgo de iniciar y perpetuar la enfermedad.
Subject(s)
Therapeutics , Classification , Pulmonary Disease, Chronic ObstructiveABSTRACT
The purpose of this study was to analyze sputum cellular phenotype in patients with a diagnosis of COPD classified according to the A-D chart. We included patients of both genders, aged ≥ 60 years, who were former smokers of at least 10 packets/year, with a diagnosis of COPD under stable conditions. They were classified according to the 2011 GOLD criteria into clinical categories A, B, C, D and their bronchial inflammatory pattern was analyzed using sputum cytology. Eighty-five patients with a diagnosis of COPD were divided into category A (19), B (29), C (19) and D (18); the age of the latter was significantly higher than the rest of the patients. The predominant cellular pattern in sputum was eosinophilic (43), neutrophilic (17), mixed (9) and paucigranulocytic (16). The distribution of the predominant cellular pattern in connection with each COPD clinical group was statistically significant p ≤ 0.001. The neutrophilic cellular phenotype was predominant in group A; the eosinophilic and mixed phenotypes in groups B and C, and in group D, even though eosinophils were present, the predominant pattern was neutrophilic. We concluded that this study identified inflammatory cellular patterns that distinguish each group in the COPD A-D chart, which can contribute to explain their heterogeneous nature, customize treatment and, most of all, identify patients at risk of disease onset and perpetuation at an early stage.
Subject(s)
Therapeutics , Classification , Pulmonary Disease, Chronic ObstructiveABSTRACT
La enfermedad pulmonar obstructiva crónica (EPOC) incluye la bronquitis crónica y el enfisema pulmonar, es actualmente la sexta causa de muerte en todo el mundo, aunque se estima que llegará a ocupar el tercer lugar en el 20201. Constituye la quinta causa de incapacidad después de las enfermedades cardio y cerebrovasculares. La EPOC representa asimismo una significativa carga en términos de pérdidas en productividad, y los costos directos e indirectos asociados con ella podrían ser comparables a los de las enfermedades más incapacitantes como el ataque cardíaco, cáncer de pulmón o de mama
Subject(s)
Pulmonary Emphysema , Bronchitis, Chronic , Pulmonary Disease, Chronic Obstructive , NeutrophilsABSTRACT
En los países autorizados y legislados para ejercer la medicina complementaria-alternativa (MCA), como son especialmente los europeos, entre los cuales el más destacado es Alemania, la población asmática que accede a esta medicina son predominantemente las mujeres más jóvenes con un nivel socio cultural y económico alto y cuyo objetivo es el de mejorar la calidad de vida
