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https://www.readbyqxmd.com/read/29449632/inducible-nitric-oxide-synthase-during-the-late-phase-of-sepsis-is-associated-with-hypothermia-and-immune-cell-migration
#1
Yudai Takatani, Kenji Ono, Hiromi Suzuki, Masato Inaba, Makoto Sawada, Naoyuki Matsuda
Hypothermia is a significant sign of sepsis, which is associated with poor prognosis, but few mechanisms underlying the regulation of hypothermia are known. Inducible nitric oxide synthase (iNOS) is a key inflammatory mediator of sepsis. However, the therapeutic benefit of iNOS inhibition in sepsis is still controversial, and requires elucidation in an accurate model system. In this study, wild-type (WT) mice showed temperature drops in a biphasic manner at the early and late phase of sepsis, and all mice died within 48 h of sepsis...
February 14, 2018: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/29447389/survival-of-adults-with-systemic-autoimmune-rheumatic-diseases-and-pulmonary-arterial-hypertension-after-lung-transplantation
#2
Elana J Bernstein, Joan M Bathon, David J Lederer
Objectives: Pulmonary arterial hypertension (PAH) is a major cause of morbidity and mortality in adults with systemic autoimmune rheumatic diseases (ARDs). The aim of this study was to determine whether adults with ARDs and PAH on right-sided heart catheterization (ARD-PAH) have increased mortality following lung transplantation compared with those with PAH not due to an ARD. Methods: We conducted a retrospective cohort study of 93 adults with ARD-PAH and 222 adults with PAH who underwent lung transplantation in the USA between 4 May 2005 and 9 March 2015 using data from the United Network for Organ Sharing...
February 13, 2018: Rheumatology
https://www.readbyqxmd.com/read/29444095/social-class-social-mobility-and-alcohol-related-disorders-in-swedish-men-and-women-a-study-of-four-generations
#3
Anna Sidorchuk, Anna Goodman, Ilona Koupil
OBJECTIVES: To investigate whether and how social class and social mobility in grandparents and parents predict alcohol-related disorders (ARDs) in males and females aged 12+ years, and whether intergenerational social prediction of ARDs varies across time periods. METHODS: The study sample included four successive generations (G) of Swedish families from the Uppsala Birth Cohort Multigenerational Study: G0 born 1851-1912; G1 born 1915-1929; G2 born 1940-1964 and G3 born 1965-1989...
2018: PloS One
https://www.readbyqxmd.com/read/29433570/role-of-atp-sensitive-potassium-channels-on-hypoxic-pulmonary-vasoconstriction-in-endotoxemia
#4
Maurizio Turzo, Julian Vaith, Felix Lasitschka, Markus A Weigand, Cornelius J Busch
BACKGROUND: ATP-regulated potassium channels (KATP) regulate pulmonary vascular tone and are involved in hypoxic pulmonary vasoconstriction (HPV). In patients with inflammation like sepsis or ARDS, HPV is impaired, resulting in a ventilation-perfusion mismatch and hypoxia. Since increase of vascular KATP channel Kir6.1 has been reported in animal models of endotoxemia, we studied the expression and physiological effects of Kir6.1 in murine endotoxemic lungs. We hypothesized that inhibition of overexpressed Kir6...
February 13, 2018: Respiratory Research
https://www.readbyqxmd.com/read/29425776/the-effects-of-hemoglobin-glutamer-200-and-ino-on-pulmonary-vascular-tone-and-arterial-oxygenation-in-an-experimental-acute-respiratory-distress-syndrome
#5
Maria Theresa Voelker, Andreas Bergmann, Thilo Busch, Nora Jahn, Sven Laudi, Katharina Noreikat, Philipp Simon, Sven Bercker
INTRODUCTION: Hemoglobin-based oxygen carriers (HBOC) have been developed as an alternative to blood transfusions. Their nitric-oxide-scavenging properties HBOC also induce vasoconstriction. In acute lung injury, an excess of nitric oxide results in a general vasodilation, reducing oxygenation by impairing the hypoxic pulmonary vasoconstriction. Inhaled nitric oxide (iNO) is used to correct the ventilation perfusion mismatch. We hypothesized that the additional use of HBOC might increase this effect...
February 6, 2018: Pulmonary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29425463/genome-wide-association-study-in-african-americans-with-acute-respiratory-distress-syndrome-identifies-the-selectin-p-ligand-gene-as-a-risk-factor
#6
Christian Bime, Nima Pouladi, Saad Sammani, Ken Batai, Nancy Casanova, Tong Zhou, Carrie L Kempf, Xiaoguang Sun, Sara M Camp, Ting Wang, Rick A Kittles, Yves A Lussier, Tiffanie K Jones, John P Reilly, Nuala J Meyer, Jason D Christie, Jason Karnes, Manuel Gonzalez-Garay, David C Christiani, Charles R Yates, Mark M Wurfel, Gianfranco U Meduri, Joe G N Garcia
RATIONALE: Genetic factors are involved in acute respiratory distress syndrome (ARDS) susceptibility. Identification of novel candidate genes associated with increased risk and severity will improve our understanding of ARDS pathophysiology and enhance efforts to develop novel preventive and therapeutic approaches. METHODS: A genome-wide association study was performed on 232 African-American patients with ARDS and 162 at-risk controls. The Identify Candidate Causal single nucleotide polymorphisms (SNPs) and Pathways platform was used to infer the association of known gene sets with the top prioritized intragenic SNPs...
February 9, 2018: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29424907/mir-26a-protects-type-ii-alveolar-epithelial-cells-against-mitochondrial-apoptosis
#7
B-Y Xu, Y-L Li, B Luan, Y-L Zhang, T-M Jia, J-Y Qiao
OBJECTIVE: This study aims to investigate the miR-26a effects on H2O2-induced apoptosis of Type II alveolar epithelial cells (AEC-II) and the potential mechanism. MATERIALS AND METHODS: AEC-II cells were treated with 0.5 mmol/L H2O2 to mimic cellular model of acute lung injury. Transmitting electron microscopy (TEM) was employed to observe the change of morphological structures. After infecting with miR-26a mimics, flow cytometry was performed to detect cell apoptosis...
January 2018: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29422044/endothelial-cdc42-deficiency-impairs-endothelial-regeneration-and-vascular-repair-after-inflammatory-vascular-injury
#8
Jiawen Lv, Junchao Zeng, Fukun Guo, Yiran Li, Mengying Xu, Yuanxiong Cheng, Lin Zhang, Shaoxi Cai, Yinghua Chen, Yi Zheng, Guodong Hu
BACKGROUND: Endothelial cell (EC) regeneration is essential for inflammation resolution and vascular integrity recovery after inflammatory vascular injury. Cdc42 is a central regulator of cell survival and vessel formation in EC development. However, it is unknown that whether Cdc42 could be a regulating role of EC repair following the inflammatory injury in the lung. The study sought to test the hypothesis that Cdc42 is required for endothelial regeneration and vascular integrity recovery after LPS-induced inflammatory injury...
February 8, 2018: Respiratory Research
https://www.readbyqxmd.com/read/29421525/impact-of-calcium-sensitive-dyes-on-the-beating-properties-and-pharmacological-responses-of-human-ips-derived-cardiomyocytes-using-the-calcium-transient-assay
#9
Ivan Kopljar, An N Hermans, Ard Teisman, David J Gallacher, Hua Rong Lu
INTRODUCTION: Calcium-based screening of hiPS-CMs is a useful preclinical safety evaluation platform with the ability to generate robust signals that facilitates high-throughput screening and data analysis. However, due to the potential inherent toxicities, it is important to understand potential effects of different calcium-sensitive dyes on the hiPS-CMs model. METHODS: We compared three calcium-sensitive fluorescence dyes (Cal520, ACTOne and Calcium 5) for their impact on the variability, the beating properties and the pharmacological responses of hiPS-CMs using the Hamamatsu FDSS/μCell imaging platform...
February 5, 2018: Journal of Pharmacological and Toxicological Methods
https://www.readbyqxmd.com/read/29416730/neutrophil-extracellular-traps-contribute-to-the-pathogenesis-of-acid-aspiration-induced-ali-ards
#10
Haitao Li, Xiaoting Zhou, Hongyi Tan, Yongbin Hu, Lemeng Zhang, Shuai Liu, Minhui Dai, Yi Li, Qian Li, Zhi Mao, Pinhua Pan, Xiaoli Su, Chengpin Hu
Background: Acute lung injury/acute respiratory distress syndrome (ALI/ARDS) is a manifestation of systemic inflammation in the lungs, but the factors that trigger inflammation in ALI/ARDS are unclear. We hypothesized that neutrophil extracellular traps (NETs) contribute to the pathogenesis of acid aspiration-induced ALI/ARDS. Results: Analysis of bronchial aspirates from ARDS patients showed that NETs were significantly correlated with the degree of ARDS (r = -0...
January 5, 2018: Oncotarget
https://www.readbyqxmd.com/read/29415887/maladaptive-role-of-neutrophil-extracellular-traps-in-pathogen-induced-lung-injury
#11
Emma Lefrançais, Beñat Mallavia, Hanjing Zhuo, Carolyn S Calfee, Mark R Looney
Neutrophils dominate the early immune response in pathogen-induced acute lung injury, but efforts to harness their responses have not led to therapeutic advancements. Neutrophil extracellular traps (NETs) have been proposed as an innate defense mechanism responsible for pathogen clearance, but there are concerns that NETs may induce collateral damage to host tissues. Here, we detected NETs in abundance in mouse models of severe bacterial pneumonia/acute lung injury and in human subjects with acute respiratory distress syndrome (ARDS) from pneumonia or sepsis...
February 8, 2018: JCI Insight
https://www.readbyqxmd.com/read/29415701/the-relationship-between-high-dose-corticosteroid-treatment-and-mortality-in-acute-respiratory-distress-syndrome-a-retrospective-and-observational-study-using-a-nationwide-administrative-database-in-japan
#12
Takashi Kido, Keiji Muramatsu, Takeshi Asakawa, Hiroki Otsubo, Takaaki Ogoshi, Keishi Oda, Tatsuhiko Kubo, Yoshihisa Fujino, Shinya Matsuda, Toshihiko Mayumi, Hiroshi Mukae, Kazuhiro Yatera
BACKGROUND: In the 1980s, randomized-controlled trials showed that high-dose corticosteroid treatment did not improve the mortality of acute respiratory distress syndrome (ARDS). However, while the diagnostic criteria for ARDS have since changed, and supportive therapies have been improved, no randomized-controlled trials have revisited this issue since 1987; thus, the effect of high-dose corticosteroid treatment may be different in this era. We evaluated the effect of high-dose corticosteroid treatment in patients with ARDS using a nationwide administrative database in Japan in a retrospective and observational study...
February 7, 2018: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/29405107/zika-virus-infection-in-syrian-golden-hamsters-and-strain-13-guinea-pigs
#13
Lynn J Miller, Farooq Nasar, Christopher W Schellhase, Sarah L Norris, Adrienne E Kimmel, Stephanie M Valdez, Suzanne E Wollen-Roberts, Joshua D Shamblin, Thomas R Sprague, Luis A Lugo-Roman, Richard G Jarman, In-Kyu Yoon, Maria T Alera, Sina Bavari, M Louise M Pitt, Andrew D Haddow
To evaluate potential immunocompetent small animal models of Zika virus (ZIKV) infection, we inoculated Syrian golden hamsters (subcutaneously or intraperitoneally) and strain 13 guinea pigs (intraperitoneally) with Senegalese ZIKV strain ArD 41525 or Philippines ZIKV strain CPC-0740. We did not detect viremia in hamsters inoculated subcutaneously with either virus strain, although some hamsters developed virus neutralizing antibodies. However, we detected statistically significant higher viremias (P = 0.0285) and a higher median neutralization titer (P = 0...
February 5, 2018: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29402831/nf-%C3%AE%C2%BAb-induced-microrna-211-inhibits-interleukin-10-in-macrophages-of-rats-with-lipopolysaccharide-induced-acute-respiratory-distress-syndrome
#14
Shengyun Wang, Zhenjie Li, Qitong Chen, Lv Wang, Jinhao Zheng, Zhaofen Lin, Wenfang Li
BACKGROUND/AIMS: The present study addressed the potential involvement of microRNAs in acute respiratory distress syndrome (ARDS)-related inflammation and elucidates the underlying molecular mechanism. METHODS: ARDS rat model was established by lipopolysaccharide, with compromised gas exchange capacity and lung edema. The inflammatory cells from bronchoalveolar lavage fluid (BALF) were profiled with automatic blood cell analyzer. The relative fluorescence intensity of BALF-derived macrophages was analyzed by flow cytometry...
January 19, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29380160/peep-titration-the-effect-of-prone-position-and-abdominal-pressure-in-an-ards-model
#15
Joseph C Keenan, Gustavo A Cortes-Puentes, Lei Zhang, Alex B Adams, David J Dries, John J Marini
BACKGROUND: Prone position and PEEP can both improve oxygenation and other parameters, but their interaction has not been fully described. Limited data directly compare selection of mechanically "optimal" or "best" PEEP in both supine and prone positions, either with or without changes in chest wall compliance. To compare best PEEP in these varied conditions, we used an experimental ARDS model to compare the mechanical, gas exchange, and hemodynamic response to PEEP titration in supine and prone position with varied abdominal pressure...
January 30, 2018: Intensive Care Medicine Experimental
https://www.readbyqxmd.com/read/29374248/role-of-quzhou-fructus-aurantii-extract-in-preventing-and-treating-acute-lung-injury-and-inflammation
#16
Lili Li, Sheng Zhang, Yanfei Xin, Junying Sun, Feng Xie, Lin Yang, Zhiqin Chen, Hao Chen, Fang Liu, Yaoxian Xuan, Zhenqiang You
Quzhou Fructus Aurantii (QFA) is an authentic herb of local varieties in Zhejiang, China, which is usually used to treat gastrointestinal illnesses, but its effects on respiratory inflammation have not been reported yet. In our study, the anti-inflammatory activity of QFA extract (QFAE) was evaluated on copper sulfate pentahydrate (CuSO4·5H2O)-induced transgenic neutrophil fluorescent zebrafish model. QFAE showed a significant effect of anti-inflammation in CuSO4·5H2O-induced zebrafish by reducing the neutrophil number in the inflammatory site...
January 26, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29374076/pad4-deficiency-leads-to-decreased-organ-dysfunction-and-improved-survival-in-a-dual-insult-model-of-hemorrhagic-shock-and-sepsis
#17
Bethany M Biron, Chun-Shiang Chung, Yaping Chen, Zachary Wilson, Eleanor A Fallon, Jonathan S Reichner, Alfred Ayala
Indirect acute respiratory distress syndrome (iARDS) is caused by a nonpulmonary inflammatory process resulting from insults such as nonpulmonary sepsis. Neutrophils are thought to play a significant role in mediating ARDS, with the development of iARDS being characterized by dysregulation and recruitment of activated neutrophils into the lung. Recently, a novel mechanism of microbial killing by neutrophils was identified through the formation of neutrophil extracellular traps (NETs). NETs are composed of large webs of decondensed chromatin released from activated neutrophils into the extracellular space; they are regulated by the enzyme peptidylarginine deiminase 4 (PAD4) through mediation of chromatin decondensation via citrullination of target histones...
January 26, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29373802/peep-lower-than-the-ards-network-protocol-is-associated-with-higher-pediatric-ards-mortality
#18
Robinder G Khemani, Kaushik Parvathaneni, Nadir Yehya, Anoopindar K Bhalla, Neal J Thomas, Christopher J L Newth
RATIONALE: The ARDS Network used a Positive End-Expiratory Pressure (PEEP)/FiO2 model in many studies. In general, pediatric intensivists use less PEEP and higher FiO2 than this model. OBJECTIVES: To evaluate whether children managed with PEEP lower than recommended by the ARDSNet PEEP/FiO2 model had higher mortality. METHODS: Multi-center, retrospective analysis of patients with Pediatric ARDS (PARDS), managed without a formal PEEP/FiO2 protocol...
January 26, 2018: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29370303/mers-cov-4b-protein-interferes-with-the-nf-%C3%AE%C2%BAb-dependent-innate-immune-response-during-infection
#19
Javier Canton, Anthony R Fehr, Raúl Fernandez-Delgado, Francisco J Gutierrez-Alvarez, Maria T Sanchez-Aparicio, Adolfo García-Sastre, Stanley Perlman, Luis Enjuanes, Isabel Sola
Middle East respiratory syndrome coronavirus (MERS-CoV) is a novel human coronavirus that emerged in 2012, causing severe pneumonia and acute respiratory distress syndrome (ARDS), with a case fatality rate of ~36%. When expressed in isolation, CoV accessory proteins have been shown to interfere with innate antiviral signaling pathways. However, there is limited information on the specific contribution of MERS-CoV accessory protein 4b to the repression of the innate antiviral response in the context of infection...
January 25, 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29365277/interferon-%C3%AE-improves-sepsis-related-alveolar-macrophage-dysfunction-and-post-septic-ards-related-mortality
#20
Takahiro Hiruma, Hitoshi Tsuyuzaki, Kanji Uchida, Bruce C Trapnell, Yoshiro Yamamura, Yoshiomi Kusakabe, Tokie Totsu, Takuji Suzuki, Shigeki Morita, Kent Doi, Eisei Noiri, Kensuke Nakamura, Susumu Nakajima, Naoki Yahagi, Naoto Morimura, Kyungho Chang, Yoshitsugu Yamada
Interferon-β (IFNβ) is reported to improve survival in patients with acute respiratory distress syndrome (ARDS), possibly by preventing sepsis-induced immunosuppression, but its therapeutic nature in ARDS pathogenesis is poorly understood. We investigated the therapeutic effects of IFNβ for post-septic ARDS to better understand its pathogenesis in mice. Post-septic ARDS was reproduced in mice by cecal ligation and puncture to induce sepsis followed 4 days later by intratracheal instillation of Pseudomonas aeruginosa to cause pneumonia with or without subcutaneous administration of IFNβ 1 day earlier...
January 24, 2018: American Journal of Respiratory Cell and Molecular Biology
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