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https://www.readbyqxmd.com/read/28931041/lactobacillus-paracasei-feeding-improves-immune-control-of-influenza-infection-in-mice
#1
Nouria Belkacem, Nicolas Serafini, Richard Wheeler, Muriel Derrien, Lilia Boucinha, Aurélie Couesnon, Nadine Cerf-Bensussan, Ivo Gomperts Boneca, James P Di Santo, Muhamed-Kkeir Taha, Raphaëlle Bourdet-Sicard
Respiratory tract infections such as flu cause severe morbidity and mortality and are among the leading causes of death in children and adults worldwide. Commensal microbiota is critical for orchestrating tissue homeostasis and immunity in the intestine. Probiotics represent an interesting source of immune modulators and several clinical studies have addressed the potential beneficial effects of probiotics against respiratory infections. Therefore, we have investigated the mechanisms of protection conferred by L...
2017: PloS One
https://www.readbyqxmd.com/read/28930979/analysis-of-18fdg-pet-ct-imaging-as-a-tool-for-studying-mycobacterium-tuberculosis-infection-and-treatment-in-non-human-primates
#2
Alexander G White, Pauline Maiello, M Teresa Coleman, Jaime A Tomko, L James Frye, Charles A Scanga, Philana Ling Lin, JoAnne L Flynn
Mycobacterium tuberculosis remains the number one infectious agent in the world today. With the emergence of antibiotic resistant strains, new clinically relevant methods are needed that evaluate the disease process and screen for potential antibiotic and vaccine treatments. Positron Emission Tomography/Computed Tomography (PET/CT) has been established as a valuable tool for studying a number of afflictions such as cancer, Alzheimer's disease, and inflammation/infection. Outlined here are a number of strategies that have been employed to evaluate PET/CT images in cynomolgus macaques that are infected intrabronchially with low doses of M...
September 5, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28930978/influenza-a-virus-studies-in-a-mouse-model-of-infection
#3
Laura Rodriguez, Aitor Nogales, Luis Martínez-Sobrido
Influenza viruses cause over 500,000 deaths worldwide(1) and are associated with an annual cost of 12 - 14 billion USD in the United States alone considering direct medical and hospitalization expenses and work absenteeism(2). Animal models are crucial in Influenza A virus (IAV) studies to evaluate viral pathogenesis, host-pathogen interactions, immune responses, and the efficacy of current and/or novel vaccine approaches as well as antivirals. Mice are an advantageous small animal model because their immune system is evolutionarily similar to that found in humans, they are available from commercial vendors as genetically identical subjects, there are multiple strains that can be exploited to evaluate the genetic basis of infections, and they are relatively inexpensive and easy to manipulate...
September 7, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28930685/human-tissue-resident-memory-t-cells-are-defined-by-core-transcriptional-and-functional-signatures-in-lymphoid-and-mucosal-sites
#4
Brahma V Kumar, Wenji Ma, Michelle Miron, Tomer Granot, Rebecca S Guyer, Dustin J Carpenter, Takashi Senda, Xiaoyun Sun, Siu-Hong Ho, Harvey Lerner, Amy L Friedman, Yufeng Shen, Donna L Farber
Tissue-resident memory T cells (TRMs) in mice mediate optimal protective immunity to infection and vaccination, while in humans, the existence and properties of TRMs remain unclear. Here, we use a unique human tissue resource to determine whether human tissue memory T cells constitute a distinct subset in diverse mucosal and lymphoid tissues. We identify a core transcriptional profile within the CD69(+) subset of memory CD4(+) and CD8(+) T cells in lung and spleen that is distinct from that of CD69(-) TEM cells in tissues and circulation and defines human TRMs based on homology to the transcriptional profile of mouse CD8(+) TRMs...
September 19, 2017: Cell Reports
https://www.readbyqxmd.com/read/28930487/emerging-roles-of-inflammasomes-in-acute-pneumonia
#5
Sangeetha Ravi Kumar, Sagar Paudel, Laxman Ghimire, Scott Bergeron, Shanshan Cai, Rachel L Zemans, Gregory P Downey, Samithamby Jeyaseelan
Pneumonia is responsible for a substantial burden on healthcare worldwide and the single largest cause for death of infants globally. Pneumonia is caused by a variety of pathogenic microorganisms including bacteria, viruses and fungi. The lung has developed complex innate immune mechanisms to combat these infections while minimizing tissue damage. One essential mechanism that drives the initial innate immune response is sensing a broad spectrum of stimuli in the cytosol by inflammasomes. Inflammasomes are composed of NLR and non-NLR proteins, and activate caspase-1 that results in proinflammatory cytokine activation...
September 20, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28930287/exposure-to-human-alveolar-lining-fluid-enhances-mycobacterium-bovis-bcg-vaccine-efficacy-against-mycobacterium-tuberculosis-infection-in-a-cd8-t-cell-dependent-manner
#6
J I Moliva, A P Hossfeld, C H Canan, V Dwivedi, M D Wewers, G Beamer, J Turner, J B Torrelles
Current tuberculosis (TB) treatments include chemotherapy and preventative vaccination with Mycobacterium bovis Bacillus Calmette-Guérin (BCG). In humans, however, BCG vaccination fails to fully protect against pulmonary TB. Few studies have considered the impact of the human lung mucosa (alveolar lining fluid (ALF)), which modifies the Mycobacterium tuberculosis (M.tb) cell wall, revealing alternate antigenic epitopes on the bacterium surface that alter its pathogenicity. We hypothesized that ALF-induced modification of BCG would induce better protection against aerosol infection with M...
September 20, 2017: Mucosal Immunology
https://www.readbyqxmd.com/read/28929313/an-anti-propionibacterium-acnes-antibody-shows-heterologous-resistance-to-an-actinobacillus-pleuropneumoniae-infection-independent-of-neutrophils-in-mice
#7
Jian-Fang Liu, Qiu-Yue Ma, Ri-Ning Zhu, Meng-Jun Cheng, Chun-Tong Bao, Jing-Min Gu, Chang-Jiang Sun, Paul Richard Langford, Wen-Yu Han, Lian-Cheng Lei
Porcine contagious pleuropneumonia is a highly fatal respiratory disease that is caused by Actinobacillus pleuropneumoniae (APP) and results in tremendous economic losses for the pig breeding industry worldwide. Previous studies have demonstrated that Propionibacterium acnes (PA) could effectively prevent APP infection in mice and pigs. The humoral immune response played a primary role during this process and anti-PA antibody could mediate macrophages to kill the bacteria. However, the role of neutrophils in this process is currently unknown...
September 20, 2017: Immunologic Research
https://www.readbyqxmd.com/read/28929280/ecology-of-scedosporium-species-present-knowledge-and-future-research
#8
A Rougeron, S Giraud, A Alastruey-Izquierdo, J Cano-Lira, J Rainer, A Mouhajir, S Le Gal, G Nevez, W Meyer, J P Bouchara
The genus Scedosporium, which comprises at least five clinically relevant species, i.e. Scedosporium apiospermum, Scedosporium boydii, Scedosporium aurantiacum, Scedosporium dehoogii and Scedosporium minutisporum, ranks the second among the filamentous fungi colonizing the airways of patients with cystic fibrosis (CF). This colonization of the airways is thought to contribute to the inflammatory reaction leading to a progressive deterioration of the lung function. Additionally, these colonizing fungi may lead to severe disseminated infections in case of lung transplantation...
September 19, 2017: Mycopathologia
https://www.readbyqxmd.com/read/28928848/primary-lymphoepithelioma-like-carcinoma-of-the-lung-an-unusual-cancer-and-clinical-outcomes-of-14-patients
#9
Lan Lin, Tingyan Lin, Bangwei Zeng
Advanced lung cancer is considered to exhibit a poor prognosis; however, the pulmonary lymphoepithelioma-like carcinoma (LELC), a rare subtype of non-small cell lung cancer (NSCLC), exhibits an improved prognosis, compared with non-LELC. The present study aimed at investigating the clinical manifestation, imaging characteristics, pathology, tumor markers, treatment and prognosis of primary LELC of the lung. A total of 14 patients with pulmonary LELC were confirmed by surgery and pathology. Clinical data of those patients were retrospectively reviewed including age, sex, smoking history, symptoms, computed tomography (CT) results, Epstein-Barr virus-encoded RNA (EBER) status, treatment and outcomes...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28928819/curcumin-induced-autophagy-anticancer-effects-on-human-lung-adenocarcinoma-cell-line-a549
#10
Furong Liu, Song Gao, Yuxuan Yang, Xiaodan Zhao, Yameng Fan, Wenxia Ma, Danrong Yang, Aimin Yang, Yan Yu
To investigate the anticancer effects of curcumin-induced autophagy and its effects on the human lung adenocarcinoma A549 cell line, inverted phase contrast microscopy was used to observe alterations to the cytomorphology of cells. An MTT assay was used to measure cell viability. Autophagy was detected using acridine orange (AO) staining and 3-methyladenine (3-MA) was used as an autophagy-specific inhibitor. Dose- and time-dependent A549 cell viability inhibition was observed following curcumin treatment. A dose-dependent increase in the red fluorescent structures in A549 cells was identified following curcumin treatment for 48 h through AO staining...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28928207/a-perfect-storm-increased-colonization-and-failure-of-vaccination-leads-to-severe-secondary-bacterial-infection-in-influenza-virus-infected-obese-mice
#11
Erik A Karlsson, Victoria A Meliopoulos, Nicholas C van de Velde, Lee-Ann van de Velde, Beth Mann, Geli Gao, Jason Rosch, Elaine Tuomanen, Jon McCullers, Peter Vogel, Stacey Schultz-Cherry
Obesity is a risk factor for developing severe disease following influenza virus infection; however, the comorbidity of obesity and secondary bacterial infection, a serious complication of influenza virus infections, is unknown. To fill this gap in knowledge, lean and obese C57BL/6 mice were infected with a nonlethal dose of influenza virus followed by a nonlethal dose of Streptococcus pneumoniae Strikingly, not only did significantly enhanced death occur in obese coinfected mice compared to lean controls, but also high mortality was seen irrespective of influenza virus strain, bacterial strain, or timing of coinfection...
September 19, 2017: MBio
https://www.readbyqxmd.com/read/28926942/the-semi-synthetic-peptide-lin-sb056-1-in-combination-with-edta-exerts-strong-antimicrobial-and-antibiofilm-activity-against-pseudomonas-aeruginosa-in-conditions-mimicking-cystic-fibrosis-sputum
#12
Giuseppantonio Maisetta, Lucia Grassi, Semih Esin, Ilaria Serra, Mariano A Scorciapino, Andrea C Rinaldi, Giovanna Batoni
Pseudomonas aeruginosa is a major cause of chronic lung infections in cystic fibrosis (CF) patients. The ability of the bacterium to form biofilms and the presence of a thick and stagnant mucus in the airways of CF patients largely contribute to antibiotic therapy failure and demand for new antimicrobial agents able to act in the CF environment. The present study investigated the anti-P. aeruginosa activity of lin-SB056-1, a recently described semi-synthetic antimicrobial peptide, used alone and in combination with the cation chelator ethylenediaminetetraacetic acid (EDTA)...
September 16, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28925950/targeting-host-cell-surface-nucleolin-for-rsv-therapy-challenges-and-opportunities
#13
Peter Mastrangelo, Michael J Norris, Wenming Duan, Edward G Barrett, Theo J Moraes, Richard G Hegele
Nucleolin (NCL) has been reported as a cellular receptor for the human respiratory syncytial virus (RSV). We studied the effects of re-purposing AS1411, an anti-cancer compound that binds cell surface NCL, as a possible novel strategy for RSV therapy in vitro and in vivo. AS1411 was administered to RSV-infected cultures of non-polarized (HEp-2) and polarized (MDCK) epithelial cells and to virus-infected mice and cotton rats. Results of in vitro experiments showed that AS1411, used in micromolar concentrations, was associated with decreases in the number of virus-positive cells...
September 19, 2017: Vaccines
https://www.readbyqxmd.com/read/28924464/the-relationship-between-mortality-of-lung-transplant-recipients-and-serum-cyclosporine-levels-joint-modeling-of-time-to-event-data-and-longitudinal-data
#14
F S Hosseini-Baharanchi, E Hajizadeh, A R Baghestani, K Najafzadeh
BACKGROUND: Lung transplantation (LTx) is a well-accepted treatment that can prolong survival of patients with advanced lung disease. OBJECTIVE: To evaluate the association between serum cyclosporine level (SCL) pattern and mortality of LTx recipients. METHODS: This retrospective cohort study included 1019 observations on 38 patients who underwent LTx in Masih Daneshvari Hospital from 2000 to 2013. The analysis applied a joint model with shared random effects...
2017: International Journal of Organ Transplantation Medicine
https://www.readbyqxmd.com/read/28924369/il-12-influence-mtor-to-modulate-cd8-t-cells-differentiation-through-t-bet-and-eomesodermin-in-response-to-invasive-pulmonary-aspergillosis
#15
Hao Wang, Jingdong Li, Qiyang Han, Fei Yang, Yu Xiao, Meng Xiao, Yingchun Xu, Longxiang Su, Na Cui, Dawei Liu
Objective: To investigate whether mTOR signaling pathway regulate the proliferation and differentiation of CD8(+) T cells by transcription factors T-bet and Eomes, and explore the role of IL-12 in this biological procedure. Methods: Aspergillus fumigatus spore suspension nasal inhalation was used to establish the invasive pulmonary aspergillosis (IPA) mouse model. After inoculation, rapamycin (2mg/kg) each day or IL-12 (5ug/kg) every other day was given for 7 days. The blood samples were obtained before the mice sacrificed and lung specimens were taken...
2017: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/28924106/intravenous-immunoglobulin-monotherapy-for-granulomatous-lymphocytic-interstitial-lung-disease-in-common-variable-immunodeficiency
#16
Mizue Hasegawa, Fumikazu Sakai, Asako Okabayashi, Akitoshi Sato, Naoko Yokohori, Hideki Katsura, Chihiro Asano, Toshiko Kamata, Eitetsu Koh, Yasuo Sekine, Kenzo Hiroshima, Takashi Ogura, Tamiko Takemura
Common variable immunodeficiency (CVID) is a heterogeneous subset of immunodeficiency disorders. Recurrent bacterial infection is the main feature of CVID, but various non-infectious complications can occur. A 42-year-old woman presented with cough and abnormal chest X-ray shadows. Laboratory tests showed remarkable hypogammaglobulinemia. Computed tomography revealed multiple consolidation and nodules on the bilateral lung fields, systemic lymphadenopathy, and splenomegaly. A surgical lung biopsy specimen provided the final diagnosis of lymphoproliferative disease in CVID, which was grouped under the term granulomatous lymphocytic interstitial lung disease...
September 15, 2017: Internal Medicine
https://www.readbyqxmd.com/read/28923895/ready-experimental-translocation-of-mycobacterium-canettii-yields-pulmonary-tuberculosis
#17
Fériel Bouzid, Fabienne Brégeon, Hubert Lepidi, Helen D Donoghue, David E Minnikin, Michel Drancourt
Mycobacterium canettii, with smooth colony morphology, is the tuberculous organism retaining most genetic traits from the putative last common ancestor of the rough morphology Mycobacterium tuberculosis complex. To explore whether M. canettii can infect individuals by the oral route, mice were fed with phosphate buffered saline or 10(6)M. canettii and were sacrificed over a 28-day experiment. While no M. canettii was detected in negative controls, M. canettii-infected mice yielded granuloma-like lesions in 4/4 lungs at days 14 and 28 post-inoculation (p...
September 18, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28923762/translating-basic-research-into-clinical-practice-vitamin-d-in-asthma-mechanisms-of-action-and-considerations-for-clinical-trials
#18
REVIEW
Paul E Pfeffer, Catherine M Hawrylowicz
There is increasing interest in the therapeutic utility of vitamin D in asthma, supported by a significant body of evidence on epidemiological associations between vitamin D insufficiency and worse asthma control. In support of a causal relationship, vitamin D beneficially modulates diverse immunological pathways in heterogeneous asthma endotypes, regulating the actions of lymphocytes, mast cells, antigen-presenting cells and structural cells to dampen excessive inflammatory responses. Allergic asthma is characterised by a failure of immune tolerance, and development of pathological responses to inhaled aeroallergens, and vitamin D has been extensively shown to support immune regulation...
September 15, 2017: Chest
https://www.readbyqxmd.com/read/28923675/respiratory-infections-due-to-nontuberculous-mycobacterias
#19
REVIEW
Luis Máiz Carro, Esther Barbero Herranz, Rosa Nieto Royo
The most common infections caused by nontuberculous mycobacteria (NTM) are lung infections. The microorganisms causing these infections most frequently are Mycobacterium avium complex, Mycobacterium kansasii and Mycobacterium abscessus complex. Their incidence has increased in the last three decades. After identifying an NTM in the respiratory tract, clinical and radiological aspects must be considered to determine if isolations are clinically relevant. Predisposing conditions that could contribute to infection must also be investigated...
September 15, 2017: Medicina Clínica
https://www.readbyqxmd.com/read/28923146/cannon-ball-diagnosis-and-management-in-a-flight-attendant-candidate
#20
Meryem Zerrik, Houda Echchachoui, Zakaria Iloughmane, Choukri El'mhadi, Salaheddine Elkhader, Laila Benaissa, Mohamed Chemsi
BACKGROUND: ''Cannon ball'' opacities on chest X-rays are a common manifestation of hematogenous dissemination of a malignant tumor in the lungs. They indicate an advanced stage of disease with a very grim prognosis in terms of cure and survival. In aerospace medicine, this aspect means the patient is unfit for flight duties. Nonmetastatic etiologies of pulmonary nodules are rare. We report a case of cannon ball opacities discovered fortuitously during an admission visit. CASE REPORT: A 23-yr-old flight attendant candidate came to the Aeromedical Expertise Center of the Military Hospital in Rabat for medical evaluation...
October 1, 2017: Aerospace Medicine and Human Performance
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