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https://www.readbyqxmd.com/read/29142211/the-microbiota-protects-against-respiratory-infection-via-gm-csf-signaling
#1
Rebecca L Brown, Richard P Sequeira, Thomas B Clarke
The microbiota promotes resistance to respiratory infection, but the mechanistic basis for this is poorly defined. Here, we identify members of the microbiota that protect against respiratory infection by the major human pathogens Streptococcus pneumoniae and Klebsiella pneumoniae. We show that the microbiota enhances respiratory defenses via granulocyte-macrophage colony-stimulating factor (GM-CSF) signaling, which stimulates pathogen killing and clearance by alveolar macrophages through extracellular signal-regulated kinase signaling...
November 15, 2017: Nature Communications
https://www.readbyqxmd.com/read/29120746/segmented-filamentous-bacteria-provoke-lung-autoimmunity-by-inducing-gut-lung-axis-th17-cells-expressing-dual-tcrs
#2
C Pierce Bradley, Fei Teng, Krysta M Felix, Teruyuki Sano, Debdut Naskar, Katharine E Block, Haochu Huang, Kenneth S Knox, Dan R Littman, Hsin-Jung Joyce Wu
Lung complications are a major cause of rheumatoid arthritis-related mortality. Involvement of gut microbiota in lung diseases by the gut-lung axis has been widely observed, but the underlying mechanism remains mostly unknown. Using an autoimmune arthritis model, we show that a constituent of the gut microbiota, segmented filamentous bacteria (SFB), distantly provoke lung pathology. SFB induce autoantibodies in lung during the pre-arthritic phase, and SFB-dependent lung pathology requires the T helper 17 (Th17) responses...
November 8, 2017: Cell Host & Microbe
https://www.readbyqxmd.com/read/29115853/extracellular-vesicles-new-players-in-lung-immunity
#3
Yu Fujita, Tsukasa Kadota, Jun Araya, Takahiro Ochiya, Kazuyoshi Kuwano
Extracellular vesicles (EVs), such as exosomes and microvesicles, play an important autocrine/paracrine role in intercellular communication. Details on the involvement of EVs in the pathogenesis of lung diseases have emerged over the past several years. Moreover, EVs package numerous DNA, proteins, mRNAs, and microRNAs (miRNAs) that can regulate immune responses in recipient cells. Almost all respiratory cells release EVs, and these EVs can have protective or detrimental functions depending on the type of donor cells, type of stimuli, and components...
November 8, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/29108861/a-slippery-slope-on-the-origin-role-and-physiology-of-mucus
#4
Farhan Taherali, Felipe Varum, Abdul W Basit
The mucosa of the gastrointestinal tract, eyes, nose, lungs, cervix and vagina is lined by epithelium interspersed with mucus-secreting goblet cells, all of which contribute to their unique functions. This mucus provides an integral defence to the epithelium against noxious agents and pathogens. However, it can equally act as a barrier to drugs and delivery systems targeting epithelial passive and active transport mechanisms. This review highlights the various mucins expressed at different mucosal surfaces on the human body, and their role in creating a mucoid architecture to protect epithelia with specialized functions...
November 3, 2017: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/29107046/pharmacological-efficacy-toxicity-of-drugs-a-comprehensive-update-about-the-dynamic-interplay-of-microbes
#5
REVIEW
J A Gimenez-Bastida, L Martinez, A Moya-Pérez, J M Laparra
Oral ingestion is a common, easy to access, route for therapeutic drugs to be delivered. The conception of the gastrointestinal tract as a passive physiological compartment has evolved towards a dynamic perspective of the same. Thus, microbiota plays an important role in contributing with additional metabolic capacities to its host as well as to its phenotypic heterogeneity. These adaptations in turn influence the efficacy and toxicity of a broad range of drugs. Notwithstanding, xenobiotics and therapeutic drugs affecting the microbiome's activity also significantly impact metabolism affecting different organs and tissues, and thereby drugs' toxicity/efficacy effects...
October 26, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29101284/genetic-mannose-binding-lectin-deficiency-is-associated-with-airway-microbiota-diversity-and-reduced-exacerbation-frequency-in-copd
#6
Alison J Dicker, Megan L Crichton, Andrew J Cassidy, Gill Brady, Adrian Hapca, Roger Tavendale, Gisli G Einarsson, Elizabeth Furrie, J Stuart Elborn, Stuart Schembri, Sara E Marshall, Colin N A Palmer, James D Chalmers
BACKGROUND: In cystic fibrosis and bronchiectasis, genetic mannose binding lectin (MBL) deficiency is associated with increased exacerbations and earlier mortality; associations in COPD are less clear. Preclinical data suggest MBL interferes with phagocytosis of Haemophilus influenzae, a key COPD pathogen. We investigated whether MBL deficiency impacted on clinical outcomes or microbiota composition in COPD. METHODS: Patients with COPD (n=1796) underwent MBL genotyping; linkage to health records identified exacerbations, lung function decline and mortality...
November 3, 2017: Thorax
https://www.readbyqxmd.com/read/29099689/identification-of-novel-small-rnas-in-burkholderia-cenocepacia-kc-01-expressed-under-iron-limitation-and-oxidative-stress-conditions
#7
Suparna Ghosh, Chetna Dureja, Indu Khatri, Srikrishna Subramanian, Saumya Raychaudhuri, Sagarmoy Ghosh
Small RNA (sRNA)-mediated regulation of gene expression is a major tool to understand bacterial responses to environmental changes. In particular, pathogenic bacteria employ sRNAs to adapt to the host environment and establish infection. Members of the Burkholderia cepacia complex, normally present in soil microbiota, cause nosocomial lung infection especially in hospitalized cystic fibrosis patients. We sequenced the draft genome of Burkholderia cenocepacia KC-01, isolated from the coastal saline soil, and identified several potential sRNAs in silico...
November 3, 2017: Microbiology
https://www.readbyqxmd.com/read/29078799/comparing-microbiotas-in-the-upper-aerodigestive-and-lower-respiratory-tracts-of-lambs
#8
Laura Glendinning, David Collie, Steven Wright, Kenny M D Rutherford, Gerry McLachlan
BACKGROUND: Recently, the importance of the lung microbiota during health and disease has been examined in humans and in small animal models. Whilst sheep have been proposed as an appropriate large animal model for studying the pathophysiology of a number of important human respiratory diseases, it is clearly important to continually define the limits of agreement between these systems as new concepts emerge. In humans, it has recently been established that the lung microbiota is seeded by microbes from the oral cavity...
October 27, 2017: Microbiome
https://www.readbyqxmd.com/read/29075294/desired-turbulence-gut-lung-axis-immunity-and-lung-cancer
#9
REVIEW
Rea Bingula, Marc Filaire, Nina Radosevic-Robin, Mathieu Bey, Jean-Yves Berthon, Annick Bernalier-Donadille, Marie-Paule Vasson, Edith Filaire
The microbiota includes different microorganisms consisting of bacteria, fungi, viruses, and protozoa distributed over many human body surfaces including the skin, vagina, gut, and airways, with the highest density found in the intestine. The gut microbiota strongly influences our metabolic, endocrine, and immune systems, as well as both the peripheral and central nervous systems. Recently, a dialogue between the gut and lung microbiota has been discovered, suggesting that changes in one compartment could impact the other compartment, whether in relation to microbial composition or function...
2017: Journal of Oncology
https://www.readbyqxmd.com/read/29062070/new-opportunities-for-managing-acute-and-chronic-lung-infections
#10
REVIEW
William O C M Cookson, Michael J Cox, Miriam F Moffatt
Lung diseases caused by microbial infections affect hundreds of millions of children and adults throughout the world. In Western populations, the treatment of lung infections is a primary driver of antibiotic resistance. Traditional therapeutic strategies have been based on the premise that the healthy lung is sterile and that infections grow in a pristine environment. As a consequence, rapid advances in our understanding of the composition of the microbiota of the skin and bowel have not yet been matched by studies of the respiratory tree...
October 24, 2017: Nature Reviews. Microbiology
https://www.readbyqxmd.com/read/29061041/proteomic-and-metaproteomic-approaches-to-understand-host-microbe-interactions
#11
Amanda E Starr, Shelley A Deeke, Leyuan Li, Xu Zhang, Rachid Daoud, James Ryan, Zhibin Ning, Kai Cheng, Linh V H Nguyen, Elias Abou-Samra, Mathieu Lavallée-Adam, Daniel Figeys
No abstract text is available yet for this article.
November 9, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29042177/antibiotic-exposure-and-interpersonal-variance-mask-the-effect-of-ivacaftor-on-respiratory-microbiota-composition
#12
Anton Y Peleg, Jocelyn M Choo, Katherine M Langan, Deirdre Edgeworth, Dominic Keating, John Wilson, Geraint B Rogers, Tom Kotsimbos
BACKGROUND: G551D is a class III mutation of the cystic fibrosis transmembrane regulator (CFTR) that results in impaired chloride channel function in cystic fibrosis (CF). Ivacaftor, a CFTR-potentiating agent improves sweat chloride, weight, lung function, and pulmonary exacerbation rate in CF patients with G551D mutations, but its effect on the airway microbiome remains poorly characterised. METHODS: Twenty CF patients with at least one G551D mutation from a single centre were recruited to a 4month double-blind, placebo-controlled, crossover study of ivacaftor with 28days of active treatment...
October 15, 2017: Journal of Cystic Fibrosis: Official Journal of the European Cystic Fibrosis Society
https://www.readbyqxmd.com/read/29037527/cork-study-in-cystic-fibrosis-sustained-improvements-in-ultra-low-dose-chest-ct-scores-after-cftr-modulation-with-ivacaftor
#13
Nicola J Ronan, Gisli G Einarsson, Maria Twomey, Denver Mooney, David Mullane, Muireann NiChroinin, Grace O'Callaghan, Fergus Shanahan, Desmond M Murphy, Owen J O'Connor, Cathy A Shortt, Michael M Tunney, Joseph A Eustace, Michael M Maher, J Stuart Elborn, Barry J Plant
BACKGROUND: Ivacaftor produces significant clinical benefit in patients with cystic fibrosis (CF) with the G551D mutation. Prevalence of this mutation at the Cork CF Centre is 23%. This study assessed the impact of CFTR modulation on multiple modalities of patient assessment. METHODS: Thirty-three patients with the G551D mutation were assessed at baseline and prospectively every 3 months for 1 year after initiation of ivacaftor. Change in ultra-low-dose chest CT scans, blood inflammatory mediators, and the sputum microbiome were assessed...
October 14, 2017: Chest
https://www.readbyqxmd.com/read/29035945/the-functional-consequences-of-the-microbiome-in-hiv-insights-from-metabolomic-studies
#14
Sergio Serrano-Villar, Santiago Moreno, Manuel Ferrer
PURPOSE OF REVIEW: It is critical to gain insight into the metabolic pathways by which the microbiota might influence HIV immunopathogenesis to exploit host-microbiota interactions. The aim of this review is to sketch a very broad picture of recent advances in our knowledge of how HIV might affect the microbiota, with a focus on specific gene products, particularly, metabolites produced by the microbiota that may affect HIV immunopathogenesis. RECENT FINDINGS: First, we describe the different approaches used to explore imbalances in effector microbial products during HIV infection...
October 14, 2017: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/29035085/lung-microbiota-is-related-to-smoking-status-and-to-development-of-ards-in-critically-ill-trauma-patients
#15
Ariane R Panzer, Susan V Lynch, Chaz Langelier, Jason D Christie, Kathryn McCauley, Mary Nelson, Christopher K Cheung, Neal L Benowitz, Mitchell J Cohen, Carolyn S Calfee
RATIONALE: Cigarette smoking is associated with increased risk of acute respiratory distress syndrome (ARDS) in patients following severe trauma; however, mechanisms underlying this association are unknown. OBJECTIVES: To determine whether cigarette smoking contributes to ARDS development following trauma by altering community composition of the lung microbiota Methods: We studied lung microbiota of mechanically ventilated patients admitted to the intensive care unit (ICU) following severe blunt trauma using 16S rRNA gene amplicon sequencing of endotracheal aspirate (ETA) samples obtained upon ICU admission (n=74) and at 48 hours post-admission (n=30)...
October 16, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29029813/innovative-therapy-monoclonal-antibodies-and-beyond
#16
M Di Nicola, L Apetoh, M Bellone, M P Colombo, G Dotti, S Ferrone, M Muscolini, J Hiscott, A Anichini, S M Pupa, F de Braud, M Del Vecchio
The seventh Edition of "Innovative Therapy, Monoclonal Antibodies and Beyond" Meeting took place in Milan, Italy, on January 27, 2017. The two sessions of the meeting were focused on: 1) Preclinical assays and novel biotargets; and 2) monoclonal antibodies, cell therapies and targeted molecules. Between these two sessions, a lecture entitled "HLA-antigens modulation and response to immune checkpoint inhibitor immunotherapy" was also presented. Despite the impressive successes in cancer immunotherapy in recent years, the response to immune based interventions occurs only in a minority of patients (∼20%)...
October 5, 2017: Cytokine & Growth Factor Reviews
https://www.readbyqxmd.com/read/29023689/difference-of-lower-airway-microbiome-in-bilateral-protected-specimen-brush-between-lung-cancer-patients-with-unilateral-lobar-masses-and-control-subjects
#17
Hai-Xia Liu, Li-Li Tao, Jing Zhang, Ying-Gang Zhu, Yu Zheng, Dong Liu, Min Zhou, Hui Ke, Meng-Meng Shi, Jie-Ming Qu
The functional role of respiratory microbiota has attracted an accumulating attention recently. However, the role of respiratory microbiome in lung carcinogenesis is mostly unknown. This study aimed to characterize and compare bilateral lower airway microbiome of lung cancer patients with unilateral lobar masses and control subjects. Protected bronchial specimen brushing samples were collected from 24 lung cancer patients with unilateral lobar masses (paired samples from cancerous site and the contralateral noncancerous site) and 18 healthy controls undergoing bronchoscopies and further analyzed by 16S rRNA amplicon sequencing...
October 11, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/29019144/role-of-microbiota-on-lung-homeostasis-and-diseases
#18
REVIEW
Jian Wang, Fengqi Li, Zhigang Tian
The lungs, as a place of gas exchange, are continuously exposed to environmental stimuli, such as allergens, microbes, and pollutants. The development of the culture-independent technique for microbiological analysis, such as 16S rRNA sequencing, has uncovered that the lungs are not sterile and, in fact, colonized by diverse communities of microbiota. The function of intestinal microbiota in modulating mucosal homeostasis and defense has been widely studied; however, the potential function of lung microbiota in regulating immunity and homeostasis has just begun...
October 9, 2017: Science China. Life Sciences
https://www.readbyqxmd.com/read/28982616/the-yin-and-yang-of-leukotriene-b4-mediated-inflammation-in-cancer
#19
REVIEW
Venkatakrishna R Jala, Sobha R Bodduluri, Shuchismita R Satpathy, Zinal Chheda, Rajesh K Sharma, Bodduluri Haribabu
The high affinity leukotriene B4 receptor, BLT1 mediates chemotaxis of diverse leukocyte subsets to the sites of infection or inflammation. Whereas the pathological functions of LTB4/BLT1 axis in allergy, autoimmunity and cardiovascular disorders are well established; its role in cancer is only beginning to emerge. In this review, we summarize recent findings on LTB4/BLT1 axis enabling distinct outcomes toward tumor progression. In a mouse lung tumor model promoted by silicosis-induced inflammation, genetic deletion of BLT1 attenuated neutrophilic inflammation and tumor promotion...
October 2017: Seminars in Immunology
https://www.readbyqxmd.com/read/28959241/prophylactic-supplementation-of-bifidobacterium-longum-5-1a-protects-mice-from-ovariectomy-induced-exacerbated-allergic-airway-inflammation-and-airway-hyperresponsiveness
#20
Eduardo Mendes, Beatriz G Acetturi, Andrew M Thomas, Flaviano Dos S Martins, Amanda R Crisma, Gilson Murata, Tárcio T Braga, Niels O S Camâra, Adriana L Dos S Franco, João C Setubal, Willian R Ribeiro, Claudete J Valduga, Rui Curi, Emmanuel Dias-Neto, Wothan Tavares-de-Lima, Caroline M Ferreira
Asthma is a chronic inflammatory disease that affects more females than males after puberty, and its symptoms and severity in women change during menstruation and menopause. Recently, evidence has demonstrated that interactions among the microbiota, female sex hormones, and immunity are associated with the development of autoimmune diseases. However, no studies have investigated if therapeutic gut microbiota modulation strategies could affect asthma exacerbation during menstruation and menopause. Here we aimed to examine the preventive effects of a probiotic, Bifidobacterium longum 5(1A), on airway inflammation exacerbation in allergic ovariectomized mice...
2017: Frontiers in Microbiology
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