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https://www.readbyqxmd.com/read/29346420/initial-acquisition-and-succession-of-the-cystic-fibrosis-lung-microbiome-is-associated-with-disease-progression-in-infants-and-preschool-children
#1
Marianne S Muhlebach, Bryan T Zorn, Charles R Esther, Joseph E Hatch, Conor P Murray, Lidija Turkovic, Sarath C Ranganathan, Richard C Boucher, Stephen M Stick, Matthew C Wolfgang
The cystic fibrosis (CF) lung microbiome has been studied in children and adults; however, little is known about its relationship to early disease progression. To better understand the relationship between the lung microbiome and early respiratory disease, we characterized the lower airways microbiome using bronchoalveolar lavage (BAL) samples obtained from clinically stable CF infants and preschoolers who underwent bronchoscopy and chest computed tomography (CT). Cross-sectional samples suggested a progression of the lower airways microbiome with age, beginning with relatively sterile airways in infancy...
January 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29335027/fungi-stabilize-connectivity-in-the-lung-and-skin-microbial-ecosystems
#2
Laura Tipton, Christian L Müller, Zachary D Kurtz, Laurence Huang, Eric Kleerup, Alison Morris, Richard Bonneau, Elodie Ghedin
BACKGROUND: No microbe exists in isolation, and few live in environments with only members of their own kingdom or domain. As microbiome studies become increasingly more interested in the interactions between microbes than in cataloging which microbes are present, the variety of microbes in the community should be considered. However, the majority of ecological interaction networks for microbiomes built to date have included only bacteria. Joint association inference across multiple domains of life, e...
January 15, 2018: Microbiome
https://www.readbyqxmd.com/read/29327043/association-of-oral-microbiome-with-risk-for-incident-head-and-neck-squamous-cell-cancer
#3
Richard B Hayes, Jiyoung Ahn, Xiaozhou Fan, Brandilyn A Peters, Yingfei Ma, Liying Yang, Ilir Agalliu, Robert D Burk, Ian Ganly, Mark P Purdue, Neal D Freedman, Susan M Gapstur, Zhiheng Pei
Importance: Case-control studies show a possible relationship between oral bacteria and head and neck squamous cell cancer (HNSCC). Prospective studies are needed to examine the temporal relationship between oral microbiome and subsequent risk of HNSCC. Objective: To prospectively examine associations between the oral microbiome and incident HNSCC. Design, Setting, and Participants: This nested case-control study was carried out in 2 prospective cohort studies: the American Cancer Society Cancer Prevention Study II Nutrition Cohort (CPS-II) and the Prostate, Lung, Colorectal, and Ovarian Cancer Screening Trial (PLCO)...
January 11, 2018: JAMA Oncology
https://www.readbyqxmd.com/read/29318023/microbiome-and-asthma
#4
REVIEW
Milena Sokolowska, Remo Frei, Nonhlanhla Lunjani, Cezmi A Akdis, Liam O'Mahony
The mucosal immune system is in constant communication with the vast diversity of microbes present on body surfaces. The discovery of novel molecular mechanisms, which mediate host-microbe communication, have highlighted the important roles played by microbes in influencing mucosal immune responses. Dendritic cells, epithelial cells, ILCs, T regulatory cells, effector lymphocytes, NKT cells and B cells can all be influenced by the microbiome. Many of the mechanisms being described are bacterial strain- or metabolite-specific...
2018: Asthma research and practice
https://www.readbyqxmd.com/read/29313208/perspective-on-immune-oncology-with-liquid-biopsy-peripheral-blood-mononuclear-cells-and-microbiome-with-non-invasive-biomarkers-in-cancer-patients
#5
REVIEW
A Mitsuhashi, Y Okuma
Antibodies against immune checkpoint inhibitors such as anti-programmed cell death protein 1 (PD-1) and anti-programmed death ligand 1 (PD-L1) play a key role in the treatment of advanced lung cancer. To examine the clinical benefits of these agents, preclinical and clinical studies have been conducted to identify definitive biomarkers associated with cancer status. Analysis of the blood and feces of tumor patients has attracted attention in recent studies attempting to identify non-invasive biomarkers such as cytokines, soluble PD-L1, peripheral blood mononuclear cells, and gut microbiota...
January 8, 2018: Clinical & Translational Oncology
https://www.readbyqxmd.com/read/29282143/azithromycin-versus-placebo-for-the-treatment-of-hiv-associated-chronic-lung-disease-in-children-and-adolescents-breathe-trial-study-protocol-for-a-randomised-controlled-trial
#6
Carmen Gonzalez-Martinez, Katharina Kranzer, Grace McHugh, Elizabeth L Corbett, Hilda Mujuru, Mark P Nicol, Sarah Rowland-Jones, Andrea M Rehman, Tore J Gutteberg, Trond Flaegstad, Jon O Odland, Rashida A Ferrand
BACKGROUND: Human immunodeficiency virus (HIV)-related chronic lung disease (CLD) among children is associated with substantial morbidity, despite antiretroviral therapy. This may be a consequence of repeated respiratory tract infections and/or dysregulated immune activation that accompanies HIV infection. Macrolides have anti-inflammatory and antimicrobial properties, and we hypothesised that azithromycin would reduce decline in lung function and morbidity through preventing respiratory tract infections and controlling systemic inflammation...
December 28, 2017: Trials
https://www.readbyqxmd.com/read/29281698/the-impact-of-persistent-bacterial-bronchitis-on-the-pulmonary-microbiome-of-children
#7
Leah Cuthbertson, Vanessa Craven, Lynne Bingle, William O C M Cookson, Mark L Everard, Miriam F Moffatt
INTRODUCTION: Persistent bacterial bronchitis (PBB) is a leading cause of chronic wet cough in young children. This study aimed to characterise the respiratory bacterial microbiota of healthy children and to assess the impact of the changes associated with the development of PBB. Blind, protected brushings were obtained from 20 healthy controls and 24 children with PBB, with an additional directed sample obtained from PBB patients. DNA was extracted, quantified using a 16S rRNA gene quantitative PCR assay prior to microbial community analysis by 16S rRNA gene sequencing...
2017: PloS One
https://www.readbyqxmd.com/read/29259328/disordered-oropharyngeal-microbial-communities-in-h7n9-patients-with-or-without-secondary-bacterial-lung-infection
#8
Hai-Feng Lu, Ang Li, Ting Zhang, Zhi-Gang Ren, Kang-Xin He, Hua Zhang, Jie-Zuan Yang, Qi-Xia Luo, Kai Zhou, Chun-Lei Chen, Xia-Liang Chen, Zhong-Wen Wu, Lan-Juan Li
Secondary bacterial lung infection (SBLI) is a serious complication in patients with H7N9 virus infection, and increases disease severity. The oropharyngeal (OP) microbiome helps prevent colonisation of respiratory pathogens. We aimed to investigate the OP microbiome of H7N9 patients with/without secondary bacterial pneumonia using 16S rRNA gene sequencing. OP swab samples were collected from 51 H7N9 patients (21 with SBLI and 30 without) and 30 matched healthy controls (HCs) and used for comparative composition, diversity and richness analyses of microbial communities...
December 20, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/29258183/the-lung-microbiome-in-idiopathic-pulmonary-fibrosis-a-promising-approach-for-targeted-therapies
#9
REVIEW
Fastrès Aline, Felice Florence, Roels Elodie, Moermans Catherine, Corhay Jean-Louis, Bureau Fabrice, Louis Renaud, Clercx Cécile, Guiot Julien
This review focuses on the role of the lung microbiome in idiopathic pulmonary fibrosis. Although historically considered sterile, bacterial communities have now been well documented in lungs both in healthy and pathological conditions. Studies in idiopathic pulmonary fibrosis (IPF) suggest that increased bacterial burden and/or abundance of potentially pathogenic bacteria may drive disease progression, acute exacerbations, and mortality. More recent work has highlighted the interaction between the lung microbiome and the innate immune system in IPF, strengthening the argument for the role of both host and environment interaction in disease pathogenesis...
December 16, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29225146/microbial-diversity-within-the-airway-microbiome-in-chronic-pediatric-lung-diseases
#10
Andrea Hahn, Stephanie Warnken, Marcos Pérez-Losada, Robert J Freishtat, Keith A Crandall
The study of the airway microbiome in children is an area of emerging research, especially in relation to the role microbial diversity may play in acute and chronic inflammation. Three such pediatric airway diseases include cystic fibrosis, asthma, and chronic lung disease of prematurity. In cystic fibrosis, the presence of Pseudomonas spp. is associated with decreased microbial diversity. Decreasing microbial diversity is also associated with poor lung function. In asthma, early viral infections appear to drive changes in bacterial diversity which may be associated with asthma risk...
December 7, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/29221917/the-distal-airway-microbiome-after-lung-transplantation-a-driver-of-immune-regulation
#11
EDITORIAL
Alicia B Mitchell, Allan R Glanville
No abstract text is available yet for this article.
November 22, 2017: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/29216202/composition-and-variation-of-respiratory-microbiota-in-healthy-military-personnel
#12
Jun Hang, Nela Zavaljevski, Yu Yang, Valmik Desai, Richard C Ruck, Louis R Macareo, Richard G Jarman, Jaques Reifman, Robert A Kuschner, Paul B Keiser
Certain occupational and geographical exposures have been associated with an increased risk of lung disease. As a baseline for future studies, we sought to characterize the upper respiratory microbiomes of healthy military personnel in a garrison environment. Nasal, oropharyngeal, and nasopharyngeal swabs were collected from 50 healthy active duty volunteers eight times over the course of one year (1107 swabs, completion rate = 92.25%) and subjected to pyrosequencing of the V1-V3 region of 16S rDNA. Respiratory bacterial taxa were characterized at the genus level, using QIIME 1...
2017: PloS One
https://www.readbyqxmd.com/read/29214754/utility-of-conventional-culture-and-maldi-tof-ms-for-identification-of-microbial-communities-in-bronchoalveolar-lavage-fluid-in-comparison-with-the-gs-junior-next-generation-sequencing-system
#13
Ji Yeon Sung, Younjee Hwang, Mi Hwa Shin, Moo Suk Park, Sang Hoon Lee, Dongeun Yong, Kyungwon Lee
BACKGROUND: Diverse microbiota exist in the lower respiratory tract. Although next generation sequencing (NGS) is the most widely used microbiome analysis technique, it is difficult to implement NGS in clinical microbiology laboratories. Therefore, we evaluated the performance of conventional culture methods together with matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) in identifying microbiota in bronchoalveolar lavage (BAL) fluid. METHODS: BAL fluid samples (n=27) were obtained from patients undergoing diagnostic bronchoscopy for lung mass evaluation...
March 2018: Annals of Laboratory Medicine
https://www.readbyqxmd.com/read/29214071/is-bronchoscopy-an-obsolete-tool-in-cystic-fibrosis-the-role-of-bronchoscopy-in-cystic-fibrosis-and-its-clinical-use
#14
REVIEW
Lisa Paul
Cystic fibrosis (CF) is a progressive life threatening multisystem genetic disease which affects the CF transmembrane conductance regulator channel. Respiratory causes remain the most common mortality in CF. With the onset of newborn screening, initiating treatments both for prophylaxis and disease management, optimizing nutritional support, and developing therapies targeting CF transmembrane conductance regulator protein, this has significantly changed the face of managing this devastating disease. Bronchoscopy and related procedures such as bronchoalveolar lavage (BAL), transbronchial biopsies, and protected brush sampling have been looked at in the management of CF as patients with CF continue to live longer with the help of newer therapies, the microbiome in the lung becomes less diverse along with increased occurrences for noninfectious causes of airway diseases...
September 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29202739/the-lung-microbiome-in-patients-with-pneumocystosis
#15
J Kehrmann, B Veckollari, D Schmidt, O Schildgen, V Schildgen, N Wagner, M Zeschnigk, L Klein-Hitpass, O Witzke, J Buer, J Steinmann
BACKROUND: Pneumocystis jirovecii pneumonia (PCP) is an opportunistic fungal infection that is associated with a high morbidity and mortality in immunocompromised individuals. In this study, we analysed the microbiome of the lower respiratory tract from critically ill intensive care unit patients with and without pneumocystosis. METHODS: Broncho-alveolar fluids from 65 intubated and mechanically ventilated intensive care unit patients (34 PCP+ and 31 PCP- patients) were collected...
December 4, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/29197615/interplay-between-the-lung-microbiome-and-lung-cancer
#16
Qixing Mao, Feng Jiang, Rong Yin, Jie Wang, Wenjie Xia, Gaochao Dong, Weidong Ma, Yao Yang, Lin Xu, Jianzhong Hu
The human microbiome confers benefits or disease susceptibility to the human body through multiple pathways. Disruption of the symbiotic balance of the human microbiome is commonly found in systematic diseases such as diabetes, obesity, and chronic gastric diseases. Emerging evidence has suggested that dysbiosis of the microbiota may also play vital roles in carcinogenesis at multiple levels, e.g., by affecting metabolic, inflammatory, or immune pathways. Although the impact of the gut microbiome on the digestive cancer has been widely explored, few studies have investigated the interplay between the microbiome and lung cancer...
November 29, 2017: Cancer Letters
https://www.readbyqxmd.com/read/29196353/the-lung-microbiome-in-health-and-disease
#17
Miriam F Moffatt, William Ocm Cookson
The Human Microbiome Project began 10 years ago, leading to a significant growth in understanding of the role the human microbiome plays in health and disease. In this article, we explain with an emphasis on the lung, the origins of microbiome research. We discuss how 16S rRNA gene sequencing became the first major molecular tool to examine the bacterial communities present within the human body. We highlight the pitfalls of molecular-based studies, such as false findings resulting from contamination, and the limitations of 16S rRNA gene sequencing...
December 2017: Clinical Medicine: Journal of the Royal College of Physicians of London
https://www.readbyqxmd.com/read/29168073/fungus-specific-cd4-t-cells-as-specific-sensors-for-identification-of-pulmonary-fungal-infections
#18
Alexander Scheffold, Carsten Schwarz, Petra Bacher
Patients with cystic fibrosis (CF) suffer from chronic lung infections, caused by bacterial, viral or fungal pathogens, which determine morbidity and mortality. The contribution of individual pathogens to chronic disease and acute lung exacerbations is often difficult to determine due to the complex composition of the lung microbiome in CF. In particular, the relevance of fungal pathogens in CF airways remains poorly understood due to limitations of current diagnostics to identify the presence of fungal pathogens and to resolve the individual host-pathogen interaction status...
November 22, 2017: Mycopathologia
https://www.readbyqxmd.com/read/29161088/mechanistic-basis-for-obesity-related-increases-in-ozone-induced-airway-hyperresponsiveness-in-mice
#19
Stephanie A Shore
Obesity is a risk factor for asthma, especially nonallergic asthma. Ozone, a common air pollutant, is a nonallergic asthma trigger. Importantly, ozone-induced decrements in lung function are greater in obese and overweight human subjects than in lean individuals. Obese mice also exhibit exaggerated pulmonary responses to ozone. Ozone causes greater increases in pulmonary resistance, in bronchoalveolar lavage neutrophils, and in airway hyperresponsiveness in obese than in lean mice. Our data indicate that IL-33 plays a role in mediating these events...
November 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29161086/potential-role-of-the-lung-microbiome-in-shaping-asthma-phenotypes
#20
Kian Fan Chung
The introduction of 16s ribosomal RNA sequencing as a nonculture technique has led to the discovery of the presence of microbiota in the lower airways of healthy individuals. These bacterial communities may originate from the mouth and nasopharynx or from the environment by inhalation. The microbial composition of the lower airways may be modulated by dietary factors, antibiotic therapy, and microbial infections, particularly in early life. In addition, circulatory products from gut microbiota may influence the lung microbiota to maintain mucosal immunity...
November 2017: Annals of the American Thoracic Society
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