RESUMEN
The three-dimensional classical Heisenberg model on a simple cubic lattice with Dzyaloshinskii-Moriya (DM) interactions between nearest-neighbors in all directions has been studied using Monte Carlo simulations. The Metropolis algorithm, combined with single histogram reweighting techniques and finite-size scaling analyses, has been used to obtain the thermodynamic behavior of the system in the thermodynamic limit. Simulations were performed with the same set of interaction parameters for both shifted boundary conditions (SBC) and fluctuating boundary conditions (FBC). Because of an incommensurability caused by the DM interaction, the SBC incorporated a fixed shift angle at the boundary which varies as a function of the DM interaction and lattice size. This SBC method decreases the simulation time significantly, but the distribution of states is somewhat different than that obtained with FBC. The ground state for nonzero DM interaction is a spiral configuration where the spins are restricted to lie in planes perpendicular to the DM vector. We found that this spiral configuration undergoes a conventional second-order phase transition into a disordered, paramagnetic state with the transition temperature being a function of the magnitude of the DM interaction. The limiting case with only DM interaction in the model has also been considered. The critical exponent ν, the critical exponent ratios α/ν, ß/ν, γ/ν, as well as the critical temperature T_{c} and fourth-order cumulant of the order parameter U_{4}^{*} at T_{c} have been estimated for different magnitudes of DM interaction. The critical exponents and cumulants at the transition are different from those for the three-dimensional Heisenberg model, but the ratios α/ν, ß/ν, γ/ν, U_{4}^{*}/ν are the same, implying that weak universality is valid for all values of DM interaction. Structure factor calculations for particular cases have been performed considering SBC and FBC in the simulations with different lattice sizes at the critical temperatures.
Asunto(s)
Síndrome de Bronquiolitis Obliterante , Enfermedad Injerto contra Huésped , Trasplante de Células Madre Hematopoyéticas , Trasplante de Pulmón , Humanos , Trasplante de Células Madre Hematopoyéticas/efectos adversos , Factores de Riesgo , Trasplante de Pulmón/efectos adversos , Enfermedad Injerto contra Huésped/etiología , Enfermedad CrónicaRESUMEN
Lung transplantation (LTx) is the last-resort treatment for end-stage respiratory insufficiency, whatever its origin, and represents a steadily expanding field of endeavor. Major developments have been impelled over the years by painstaking efforts at LTx centers to improve donor and recipient selection, and multifaceted attempts have been made to meet the challenges raised by surgical management, perioperative care, and long-term medical complications. The number of procedures has increased, leading to improved post-LTx prognosis. One consequence of these multiple developments has been a pruning away of contraindications over time, which has, in some ways, complicated the patient selection process. With these considerations in mind, the Francophone Pulmonology Society (Société de Pneumology de Langue Française [SPLF]) has set up a task force to produce up-to-date working guidelines designed to assist pulmonologists in managing end-stage respiratory insufficiency, determining which patients may be eligible for LTx, and appropriately timing LTx-center referral. The task force has examined the most recent literature and evaluated the risk factors that continue to limit patient survival after LTx. Ideally, the objectives of LTx are to prolong life while improving quality of life. The guidelines developed by the task force apply to a limited resource and are consistent with the ethical principles described below.
Asunto(s)
Trasplante de Pulmón , Insuficiencia Respiratoria , Humanos , Calidad de Vida , Trasplante de Pulmón/métodos , Francia/epidemiología , Contraindicaciones , Insuficiencia Respiratoria/etiologíaRESUMEN
BACKGROUND: Very few studies have evaluated the quality of life (QoL) of children suffering from low-flow vascular malformations. This is the first study investigating the influencing factors. OBJECTIVES: To identify the factors influencing QoL in children with low-flow vascular malformations. METHODS: We conducted a qualitative study employing focus group interviews (Clinical Trials Number: NCT03440827). The study was a prospective, interventional, non-comparative, multicentre study performed in four expert centres for vascular anomalies. Qualitative data about personal experiences, feelings, difficulties, needs and various factors influencing behaviours were collected. Theme-based content analysis (manual and specialist textural software guided) were used to analyse the verbatim transcripts of all focus group sessions. Manual qualitative discourse analysis was performed to identify the different themes and categories. Informatics' analyses were subsequently performed for each individual category. RESULTS: Ten focus groups (26 individuals including 10 children aged 11 to 15 years) were conducted until saturation. Influencing factors were related to 4 categories: medical care, self-image, social impact on daily activities and challenging social relationships. These factors were responsible for intrafamily upheavals and may lead to future identity-building problems. CONCLUSIONS: This study provides an essential framework from which physicians can develop strategies to improve patient care and quality of life. These data may also be useful to develop specific age-sensitive QoL questionnaires.
Asunto(s)
Calidad de Vida , Malformaciones Vasculares , Adolescente , Niño , Grupos Focales , Humanos , Estudios Prospectivos , Investigación CualitativaAsunto(s)
Diabetes Mellitus Tipo 1/economía , Disparidades en el Estado de Salud , Disparidades en Atención de Salud/economía , Padres , Clase Social , Determinantes Sociales de la Salud/economía , Poblaciones Vulnerables , Biomarcadores/sangre , Niño , Diabetes Mellitus Tipo 1/sangre , Diabetes Mellitus Tipo 1/diagnóstico , Diabetes Mellitus Tipo 1/tratamiento farmacológico , Estudios de Seguimiento , Francia , Hemoglobina Glucada/metabolismo , Accesibilidad a los Servicios de Salud/economía , Accesibilidad a los Servicios de Salud/estadística & datos numéricos , Disparidades en Atención de Salud/estadística & datos numéricos , Humanos , Hipoglucemiantes/uso terapéutico , Pobreza , Estudios Prospectivos , Determinantes Sociales de la Salud/estadística & datos numéricosRESUMEN
BACKGROUND: Quantitative PCR to detect Pneumocystis jirovecii (Pj) is a new tool for the diagnosis of Pneumocystis jirovecii pneumonia (PJP). The yield of this technique, in cases of low fungal burden, when the standard technique using immunofluorescence (IF) is negative, needs to be evaluated. METHODS: We retrospectively reviewed the charts of all patients with a positive PCR but negative IF test (PCR+/IF-) in bronchoalveolar lavage (BAL) fluid performed over one year. We used an algorithm based on underlying immunosuppression, clinical picture, thoracic CT scan appearances, existence of an alternative diagnosis and the patient's outcome on treatment. Using this, each case was classified as probable PJP, possible PJP or colonization. RESULTS: Among the 416 BAL performed, 48 (12%) were PCR+/IF- and 43 patients were analyzed. Patients were mostly male (56%) with a median age of 60 years. Thirty-five (84%) were immunocompromised: 4 (9%) HIV-infected patients, 26 (60%) with hematologic or solid organ cancer, 3 (7%) were renal transplant recipients. Seven (16%) were classified as probable PPJ and 9 (21%) as possible PJP. Patients with a probable or possible PJP were more frequently admitted to the ICU (P<0.02) and had higher risk of death (P<0.01) when compared to those with colonization. Median PCR levels were very low and were not different between PJP or colonized patients (P=0.23). CONCLUSIONS: Among patients with a positive Pj PCR in BAL but with negative IF, only 37% had probable or possible PJP and PCR could not discriminate PJP from colonization.
Asunto(s)
Líquido del Lavado Bronquioalveolar/microbiología , Infecciones Fúngicas Invasoras/diagnóstico , Infecciones por Pneumocystis/diagnóstico , Pneumocystis carinii/aislamiento & purificación , Neumonía por Pneumocystis/diagnóstico , Reacción en Cadena en Tiempo Real de la Polimerasa , Adulto , Anciano , Anciano de 80 o más Años , Diagnóstico Diferencial , Femenino , Infecciones por VIH/complicaciones , Infecciones por VIH/microbiología , Humanos , Huésped Inmunocomprometido , Infecciones Fúngicas Invasoras/microbiología , Masculino , Persona de Mediana Edad , Neoplasias/complicaciones , Neoplasias/epidemiología , Neoplasias/microbiología , Infecciones Oportunistas/diagnóstico , Infecciones Oportunistas/microbiología , Infecciones por Pneumocystis/microbiología , Infecciones por Pneumocystis/patología , Pneumocystis carinii/genética , Neumonía por Pneumocystis/genética , Valor Predictivo de las Pruebas , Reacción en Cadena en Tiempo Real de la Polimerasa/métodos , Reacción en Cadena en Tiempo Real de la Polimerasa/normas , Estudios Retrospectivos , Receptores de Trasplantes/estadística & datos numéricosRESUMEN
INTRODUCTION: Several new antibiotics (ceftaroline, ceftobiprole, omadacycline, solithromycine and delafloxacin) have recently been developed. Their place in the management of community acute pneumonia (CAP) needs to be clarified. STATE OF THE ART: Because multiresistant bacteria are infrequently involved in CAP, usual regimens using third generation cephalosporins, fluoroquinolones or macrolides, alone or in combination, are effective in the overwhelming majority of cases. Several studies have highlighted the non-inferiority of the new molecules regarding their clinical efficacy compared to usual regimens. The use of these new antibiotics could reduce the treatment duration of CAP and in some cases avoid combined therapy. These antibiotics do not offer real benefits in terms of spectrum of activity compared to the current recommended treatment. The anti-toxin effect of ceftaroline and the anti-inflammatory properties of solithromycin could potentially justify their prescription over molecules currently used. CONCLUSION: Results are still pending regarding the efficacy and any possible advantages of these new molecules, and also the emergence of drug resistant bacteria. Although these drugs share some advantages, they should not be selected over antibiotics usually prescribed for the treatment of CAP.
Asunto(s)
Antibacterianos/uso terapéutico , Farmacorresistencia Bacteriana/efectos de los fármacos , Neumonía/tratamiento farmacológico , Enfermedad Aguda , Infecciones Comunitarias Adquiridas/tratamiento farmacológico , Farmacorresistencia Microbiana , Humanos , Resultado del TratamientoRESUMEN
PURPOSE: Intravesical BCG is the standard treatment of non-muscle invasive bladder cancer. No difference has yet been reported in the safety profiles of the various BCG strains. METHODS: A nationwide multidisciplinary retrospective survey was conducted between January 2013 and December 2016 to identify cases of BCG infection and differentiate them based on the type of BCG strain used. RESULTS: Forty patients were identified (BCG RIVM 28; other strains 8; unknown 4). Patients treated with BCG RIVM were less severely ill, with fewer occurrences of septic shock (3.6% vs. 50%, P=0.003) and ICU admission (7.1% vs. 62.5%, P=0.003). A higher frequency of pulmonary miliaries (71.4% vs. 12.5%, P=0.005) but lower transaminase levels (mean AST 65 vs. 264 U/L, P=0.001) were observed in these patients. No difference in terms of recovery was reported. CONCLUSION: The type of BCG strain could correlate with the frequency and severity of subsequent BCG infections.
Asunto(s)
Vacuna BCG/administración & dosificación , Vacuna BCG/efectos adversos , Infecciones por Bacillaceae/etiología , Carcinoma de Células Transicionales/tratamiento farmacológico , Neoplasias de la Vejiga Urinaria/tratamiento farmacológico , Administración Intravesical , Anciano , Anciano de 80 o más Años , Antineoplásicos/administración & dosificación , Antineoplásicos/efectos adversos , Vacuna BCG/clasificación , Infecciones por Bacillaceae/microbiología , Carcinoma de Células Transicionales/patología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Neoplasias de la Vejiga Urinaria/patología , Urotelio/microbiología , Urotelio/patologíaAsunto(s)
Deficiencia GATA2/diagnóstico , Factor de Transcripción GATA2/genética , Micosis Fungoide/diagnóstico , Neoplasias Cutáneas/diagnóstico , Piel/patología , Adulto , Análisis Mutacional de ADN , Deficiencia GATA2/complicaciones , Deficiencia GATA2/genética , Deficiencia GATA2/patología , Humanos , Masculino , Micosis Fungoide/complicaciones , Micosis Fungoide/genética , Micosis Fungoide/patología , Neoplasias Cutáneas/complicaciones , Neoplasias Cutáneas/genética , Neoplasias Cutáneas/patologíaRESUMEN
BACKGROUND: Bacille of Calmette et Guérin (BCG) immunotherapy is the most effective treatment for non-muscle-invasive bladder cancer. Yet, potentially severe localized or systemic mycobacterial infections can happen. STATE OF KNOWLEDGE: In a patient who underwent BCG instillation for bladder cancer, the diagnosis of BCG infection is usually suggested by more than 3 days of high-grade fever and systemic and/or local symptoms with no other plausible alternative diagnosis. BCG infection can be localized (usually to the genitourinary tract, the bones or blood vessels) or systemic (mainly with pulmonary and hepatic involvements). The presence of granuloma in tissue biopsies (other than from the genitourinary tract) supports the diagnosis. The advent of polymerase chain reaction has recently improved the sensitivity of microbiological investigations. The management of BCG infection is not well established but relies on broad-spectrum antimycobacterial therapy (with the exclusion of pyrazinamide), glucocorticoids (in the context of general symptoms refractory to antimicrobial therapy alone) and occasionally surgery. CONCLUSION: BCG infection is a rare but not exceptional complication of BCG immunotherapy with heterogeneous clinical presentation. Prospective studies are warranted in order to improve treatment outcomes.
Asunto(s)
Vacuna BCG/efectos adversos , Inmunoterapia/efectos adversos , Inmunoterapia/métodos , Infecciones por Mycobacterium no Tuberculosas/etiología , Mycobacterium bovis/patogenicidad , Neoplasias de la Vejiga Urinaria/terapia , Infecciones Urinarias/etiología , Administración Intravesical , Vacuna BCG/administración & dosificación , Humanos , Infecciones por Mycobacterium no Tuberculosas/diagnóstico , Neoplasias de la Vejiga Urinaria/inmunología , Infecciones Urinarias/diagnósticoRESUMEN
INTRODUCTION: Pneumonia caused by slow-growing bacteria is rare but sometimes severe. STATE OF THE ART: These infections share many similarities such as several differential diagnoses, difficulties to identify the pathogen, the importance of involving the microbiologist in the diagnostic investigation and the need for prolonged antibiotic treatment. However, major differences distinguish them: Nocardia and Rhodococcus infect mainly immunocompromised patients while actinomycosis also concerns immunocompetent patients; the severity of nocardioses is related to their hematogenous spread while locoregional extension by contiguity makes the gravity of actinomycosis. PROSPECTIVE: For these diseases, molecular diagnostic tools are essential, either to obtain a species identification and guide treatment in the case of nocardiosis or to confirm the diagnosis from a biological sample. Treatment of these infections is complex due to: (1) the limited data in the literature; (2) the need for prolonged treatment of several months; (3) the management of toxicities and drug interactions for the treatment of Nocardia and Rhodococcus. CONCLUSION: Close cooperation between pneumonologists, infectious disease specialists and microbiologists is essential for the management of these patients.
Asunto(s)
Actinomyces , Nocardia , Infecciones del Sistema Respiratorio/microbiología , Rhodococcus , Actinomyces/crecimiento & desarrollo , Actinomyces/aislamiento & purificación , Infecciones por Actinomycetales/diagnóstico , Infecciones por Actinomycetales/microbiología , Infecciones por Actinomycetales/terapia , Actinomicosis/diagnóstico , Actinomicosis/microbiología , Actinomicosis/terapia , Bacterias/crecimiento & desarrollo , Bacterias/aislamiento & purificación , Diagnóstico Diferencial , Humanos , Huésped Inmunocomprometido , Nocardia/crecimiento & desarrollo , Nocardia/aislamiento & purificación , Nocardiosis/diagnóstico , Nocardiosis/microbiología , Nocardiosis/terapia , Neumonía/diagnóstico , Neumonía/microbiología , Neumonía/terapia , Infecciones del Sistema Respiratorio/epidemiología , Infecciones del Sistema Respiratorio/patología , Infecciones del Sistema Respiratorio/terapia , Rhodococcus/crecimiento & desarrollo , Rhodococcus/aislamiento & purificación , Factores de TiempoRESUMEN
BACKGROUND: Allergic bronchopulmonary aspergillosis (ABPA) affects 3-13% of patients with asthma. Its natural history includes possibly life-threatening exacerbations and evolution towards fixed obstructive ventilatory disorders or even irreversible lung fibrosis lesions. ABPA prognosis is directly associated with exacerbation control and the main objective of the treatment is to decrease their frequency and duration. Recommendations regarding dosage and duration of treatment are not very precise. The currently used combination of itraconazole and corticosteroid therapy has many limitations. The interests of a therapeutic strategy using nebulized liposomal amphotericin B (LAmB) are to heighten antifungal lung tissue concentration, to circumvent drug interactions and decrease the potential toxicity of systemic antifungal treatments. Finally, this association leads to improved eradication of Aspergillus, thereby limiting the risk of side effects and the emergence of treatment-resistant Aspergillus strains. METHODS: This is a phase II, multicentre, randomized, single blind, controlled therapeutic study, with the objective of comparing the potential benefit on exacerbation control of a maintenance therapy by LAmB nebulization. The main objective of the study is to compare the incidence of severe clinical exacerbations in ABPA treatment, between a maintenance treatment strategy with nebulized LAmB and a conventional strategy without antifungal maintenance therapy. EXPECTED RESULTS: The results will guide practitioners in the management of ABPA treatments and help to define the place of aerosols of LAmB on "evidence base medicine" criteria.
Asunto(s)
Anfotericina B/administración & dosificación , Antifúngicos/administración & dosificación , Aspergilosis Broncopulmonar Alérgica/tratamiento farmacológico , Quimioterapia de Mantención/métodos , Nebulizadores y Vaporizadores , Administración por Inhalación , Adolescente , Adulto , Anciano , Aspergilosis Broncopulmonar Alérgica/patología , Progresión de la Enfermedad , Humanos , Persona de Mediana Edad , Método Simple Ciego , Adulto JovenAsunto(s)
Fármacos Dermatológicos/uso terapéutico , Enfermedad Injerto contra Huésped/tratamiento farmacológico , Pirazoles/uso terapéutico , Esclerodermia Localizada/tratamiento farmacológico , Adulto , Anciano , Enfermedad Crónica , Femenino , Humanos , Masculino , Persona de Mediana Edad , Nitrilos , Pirimidinas , Estudios Retrospectivos , Resultado del Tratamiento , Adulto JovenRESUMEN
Cyclic adenosine monophosphate (cAMP) plays a crucial role as a signaling molecule for capacitation, motility, and acrosome reaction in mammalian spermatozoa. It is well-known that cAMP degradation by phosphodiesterase (PDE) enzyme has a major impact on sperm functions. This study was undertaken to characterize cAMP-PDE activity in bovine spermatozoa. Total cAMP-PDE activity in cauda epididymal and ejaculated spermatozoa was 543.2 ± 49.5 and 1252.6 ± 86.5 fmoles/min/106 spermatozoa, respectively. Using different family-specific PDE inhibitors, we showed that in cauda epididymal and ejaculated spermatozoa, the major cAMP-PDE activity was papaverine-sensitive (44.5% and 57.5%, respectively, at 400 nm, papaverine is a specific inhibitor of the PDE10 family). These data are supporting the functional presence of PDE10 in bovine spermatozoa and were further confirmed by western blot to be PDE10A. Using immunocytochemistry, we showed immunoreactive signal for PDE10A present on the post-acrosomal region of the head and on the flagella of ejaculated spermatozoa. Using papaverine, we showed that it promotes tyrosine phosphorylation of sperm proteins, phosphorylation of Erk1 and Erk2, and Ca2+ release from Ca2+ store. These results suggest that PDE10 is functionally present in bovine spermatozoa and is affecting different molecular events involved in capacitation, most probably by cAMP local regulation.
Asunto(s)
Papaverina/farmacología , Hidrolasas Diéster Fosfóricas/metabolismo , Espermatozoides/enzimología , Reacción Acrosómica/efectos de los fármacos , Animales , Calcio/metabolismo , Bovinos , Epidídimo/citología , Epidídimo/metabolismo , Masculino , Fosforilación , Transducción de Señal/efectos de los fármacos , Transducción de Señal/fisiología , Espermatozoides/efectos de los fármacosRESUMEN
Acute myeloid leukemias (AMLs) result from a series of genetic events occurring in a stem or progenitor hematopoietic cell that gives rise to their clonal expansion and an impaired capacity to differentiate. To circumvent the genetic heterogeneity of AML patient cohorts, we have developed a model system, driven by the MLL-AF9 (MA9) oncogene, to generate multiple human leukemias using progenitor cells from a single healthy donor. Through stepwise RNA-sequencing data generated using this model and AML patients, we have identified consistent changes associated with MA9-driven leukemogenesis and demonstrate that no recurrent secondary mutations are required. We identify 39 biomarkers whose high expression level is specific to this genetic subtype of AML and validate that many of these have diagnostic utility. We further examined one biomarker, the receptor tyrosine kinase (RTK) RET, and show through shRNA knockdowns that its expression is essential for in vivo and in vitro growth of MA9-AML. These results highlight the value of novel human models of AML derived from single donors using specific oncogenic fusions to understand their biology and to uncover potential therapeutic targets.
Asunto(s)
Leucemia Mieloide Aguda/patología , Proteína de la Leucemia Mieloide-Linfoide/metabolismo , Proteínas de Fusión Oncogénica/metabolismo , Proteínas Proto-Oncogénicas c-ret/fisiología , Animales , Biomarcadores , Línea Celular , Línea Celular Tumoral , Proliferación Celular , Células Clonales/patología , Humanos , Leucemia Mieloide Aguda/etiología , Leucemia Mieloide Aguda/genética , Ratones , Modelos Biológicos , TransfecciónRESUMEN
Corticosteroids (CS) are an essential component of childhood acute lymphoblastic leukemia treatments (cALL). Although there is evidence that daily doses of CS can have neuropsychological effects, few studies have investigated the role of cumulative doses of CS in short- and long-term neuropsychological effects in cALL. The aims of this review were to identify the measures used for documenting adverse neuropsychological effects (ANEs) of CS treatment and to study the association between cumulative doses of CS and the presence of ANEs. Twenty-two articles met the inclusion criteria. A variety of measures were used to evaluate outcomes in the domains of emotion, behaviour, neurocognition, and fatigue/sleep. The results suggest that we cannot conclude in favour of an association between the cumulative dosage of CS and ANEs. Yet, several factors including the heterogeneity of measures used to evaluate outcomes and reporting biases may limit the scope of the results. We offer several recommendations that could help improve the future published evidence on ANEs in relation to CS treatment in cALL.
Asunto(s)
Corticoesteroides/efectos adversos , Enfermedades del Sistema Nervioso Central/inducido químicamente , Enfermedades del Sistema Nervioso Central/psicología , Leucemia-Linfoma Linfoblástico de Células Precursoras/tratamiento farmacológico , Corticoesteroides/uso terapéutico , Niño , Humanos , Pruebas NeuropsicológicasRESUMEN
The second messenger cyclic adenosine monophosphate (cAMP) has a central role in sperm physiology. Extracellular cAMP can be sequentially degraded into 5'AMP and adenosine by ecto-phosphodiesterases (ecto-PDE) and ecto-nucleotidases, a phenomenon called extracellular cAMP-adenosine pathway. As cAMP-adenosine pathway is involved in sperm capacitation, we hypothesize that extracellular PDEs are functionally present in seminal plasma. Exclusively measuring cAMP-PDE activity, total activity in bovine seminal plasma was 10.1 ± 1.5 fmoles/min/µg. Using different family-specific PDE inhibitors, we showed that in seminal plasma, the major cAMP-PDE activity was papaverine sensitive (47.5%). These data support the presence of PDE10 in bovine seminal plasma and was further confirmed by western blot. In epididymal fluid, total cAMP-PDE activity was 48.2 ± 14.8 fmoles/min/µg and we showed that the major cAMP-PDE activity was 3-isobutyl-methylxanthine insensitive and thus ascribed to PDE8 family. PDE10A mRNAs were found in the testis, epididymis, and seminal vesicles. cAMP-PDE activity is present in bovine seminal plasma and epididymal fluid. The results suggest a role for ecto-PDEs present in those fluids in the signaling pathways involved in sperm functions.
Asunto(s)
AMP Cíclico/metabolismo , Hidrolasas Diéster Fosfóricas/metabolismo , Semen/metabolismo , Animales , Bovinos , Masculino , Inhibidores de Fosfodiesterasa/farmacología , Semen/efectos de los fármacos , Espermatozoides/metabolismoRESUMEN
INTRODUCTION: Innate or acquired immune deficiency may show respiratory manifestations, often characterized by small airway involvement. The purpose of this article is to provide an overview of small airway disease across the major causes of immune deficiency. BACKGROUND: In patients with common variable immune deficiency, recurrent lower airway infections may lead to bronchiolitis and bronchiectasis. Follicular and/or granulomatous bronchiolitis of unknown origin may also occur. Bronchiolitis obliterans is the leading cause of death after the first year in patients with lung transplantation. Bronchiolitis obliterans also occurs in patients with allogeneic haematopoietic stem cell transplantation, especially in the context of systemic graft-versus-host disease. VIEWPOINT AND CONCLUSION: Small airway diseases have different clinical expression and pathophysiology across various causes of immune deficiency. A better understanding of small airways disease pathogenesis in these settings may lead to the development of novel targeted therapies.
Asunto(s)
Enfermedades Bronquiales/etiología , Síndromes de Inmunodeficiencia/complicaciones , Enfermedades Bronquiales/epidemiología , Enfermedades Bronquiales/inmunología , Enfermedades Bronquiales/patología , Bronquiolitis Obliterante/epidemiología , Bronquiolitis Obliterante/etiología , Trasplante de Células Madre Hematopoyéticas/efectos adversos , Humanos , Síndromes de Inmunodeficiencia/epidemiología , Síndromes de Inmunodeficiencia/patología , Trasplante de Pulmón/efectos adversosRESUMEN
INTRODUCTION: Common variable immunodeficiency (CVID) is characterized by a defect in antibody production and may be complicated by infectious or non-infectious respiratory disease. BACKGROUND: In addition to recurrent infectious complications, mainly due to encapsulated bacteria, CVID may be complicated by diffuse infiltrative, non-infectious lung disease. The latter may be related to granulomatosis, lymphoid interstitial pneumonia, follicular bronchiolitis, follicular nodular hyperplasia, organizing pneumonia or lymphoma. Different lymphoid histological lesions can co-exist and form a new entity called GLILD (granulomatous lymphocytic interstitial lung disease), which is associated with a poor prognosis. Replacement of immunoglobulins significantly decreases the frequency and severity of infections but has no impact on the non-infectious complications. OUTLOOK: Studies are needed to determine the modalities of follow-up and better understand the long-term progress of GLILD. These studies should improve the management of GLILD in the context of immunosuppressive treatments, which increase the risk of infection in CVID. CONCLUSION: The identification of GLILD, which reflects a variable histological spectrum, rather than a well-defined entity, necessitates revising the approach to diffuse infiltrative lung diseases in CVID.