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https://www.readbyqxmd.com/read/29146733/effects-of-chronically-increased-vegf-a-on-the-aging-heart
#1
Alexander G Marneros
Whether approaches to chronically increase VEGF-A in the heart may have beneficial effects and prevent the development of heart failure, in part by improving cardiac perfusion, or whether this increase could have detrimental effects on cardiac performance in the aging heart, has not been tested yet. In this study, a genetic mouse model with a chronic increase in VEGF-A in the heart is shown to have increased cardiac angiogenesis and develop cardiac hypertrophy with enhanced basal cardiac performance with age progression...
November 16, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29142418/marantodes-pumilum-blume-kuntze-inhibited-secretion-of-lipopolysaccharide-and-monosodium-urate-crystal-stimulated-cytokines-and-plasma-prostaglandin-e2
#2
Eldiza Puji Rahmi, Jamia Azdina Jamal, Endang Kumolosasi, Juriyati Jalil, Nor-Ashila Aladdin
Background: Marantodes pumilum is traditionally used for dysentery, gonorrhea, and sickness in the bones. Previous studies revealed its antibacterial and xanthine oxidase inhibitory activities. Objective: To evaluate the inhibitory effects of three M. pumilum varieties on the secretion of lipopolysaccharide (LPS)- and monosodium urate crystal (MSU)-induced cytokines and plasma prostaglandin E2 (PGE2) in vitro. Materials and Methods: The leaves and roots of M...
October 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29142211/the-microbiota-protects-against-respiratory-infection-via-gm-csf-signaling
#3
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/29139477/a-dietary-flavone-confers-communicable-protection-against-colitis-through-nlrp6-signaling-independently-of-inflammasome-activation
#4
K Radulovic, S Normand, A Rehman, A Delanoye-Crespin, J Chatagnon, M Delacre, N Waldschmitt, L F Poulin, J Iovanna, B Ryffel, P Rosenstiel, M Chamaillard
Flavones represent a class of polyphenols that are found in many plant-derived food sources. Herein, we provide evidence that the anti-inflammatory and antiproliferative effect of the flavone apigenin relies on the regulation of the gut microbiota by the NOD-like receptor family pyrin domain containing 6 (Nlrp6). When challenged by dextran sulfate sodium (DSS) in drinking water, mice were protected against colitis upon cohousing with apigenin-treated animals. In contrast, the protective effect was lost in the absence of Nlrp6...
November 15, 2017: Mucosal Immunology
https://www.readbyqxmd.com/read/29135455/transcriptome-wide-association-study-of-inflammatory-biologic-age
#5
Honghuang Lin, Kathryn L Lunetta, Qiang Zhao, Jian Rong, Emelia J Benjamin, Michael M Mendelson, Roby Joehanes, Daniel Levy, Martin G Larson, Joanne M Murabito
Chronic low grade inflammation is a fundamental mechanism of aging. We estimated biologic age using nine biomarkers from diverse inflammatory pathways and we hypothesized that genes associated with inflammatory biological age would provide insights into human aging. In Framingham Offspring Study participants at examination 8 (2005 to 2008), we used the Klemera-Doubal method to estimate inflammatory biologic age and we computed the difference (∆Age) between biologic age and chronologic age. Gene expression in whole blood was measured using the Affymetrix Human Exon 1...
November 11, 2017: Aging
https://www.readbyqxmd.com/read/29130033/danger-of-frustrated-sensors-role-of-toll-like-receptors-and-nod-like-receptors-in-aseptic-and-septic-inflammations-around-total-hip-replacements
#6
Michiaki Takagi, Yuya Takakubo, Jukka Pajarinen, Yasushi Naganuma, Hiroharu Oki, Masahiro Maruyama, Stuart B Goodman
The innate immune sensors, Toll-like receptors (TLRs) and nucleotide-binding oligomerization domain (NOD)-like receptors (NLRs), can recognize not only exogenous pathogen-associated molecular patterns (PAMPs), but also endogenous molecules created upon tissue injury, sterile inflammation, and degeneration. Endogenous ligands are called damage-associated molecular patterns (DAMPs), and include endogenous molecules released from activated and necrotic cells as well as damaged extracellular matrix. TLRs and NLRs can interact with various ligands derived from PAMPs and DAMPs, leading to activation and/or modulation of intracellular signalling pathways...
July 2017: Journal of Orthopaedic Translation
https://www.readbyqxmd.com/read/29129820/deactivation-of-the-nlrp3-inflammasome-in-infiltrating-macrophages-by-duodenal-jejunal-bypass-surgery-mediates-improvement-of-beta-cell-function-in-type-2-diabetes
#7
Dong Wu, Zhi-Bo Yan, Yu-Gang Cheng, Ming-Wei Zhong, Shao-Zhuang Liu, Guang-Yong Zhang, San-Yuan Hu
OBJECTIVE: Bariatric surgery could improve pancreatic beta cell function, thereby leading to the remission of the type 2 diabetes mellitus (T2DM). However, the specific mechanism underlying this phenomenon is yet to be revealed. The aim of this study is to test the hypothesis that Nod-like receptor family pyrin domain containing 3 (NLRP3) inflammasome in infiltrating macrophages plays an important role in the modulation of beta cell function after duodenal-jejunal bypass (DJB) surgery...
November 9, 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/29123531/chronic-obstructive-pulmonary-disease-derived-circulating-cells-release-il-18-and-il-33-under-ultrafine-particulate-matter-exposure-in-a-caspase-1-8-independent-manner
#8
Gianluigi De Falco, Chiara Colarusso, Michela Terlizzi, Ada Popolo, Michela Pecoraro, Mario Commodo, Patrizia Minutolo, Mariano Sirignano, Andrea D'Anna, Rita P Aquino, Aldo Pinto, Antonio Molino, Rosalinda Sorrentino
Chronic obstructive pulmonary disease (COPD) is considered the fourth-leading causes of death worldwide; COPD is caused by inhalation of noxious indoor and outdoor particles, especially cigarette smoke that represents the first risk factor for this respiratory disorder. To mimic the effects of particulate matter on COPD, we isolated peripheral blood mononuclear cells (PBMCs) and treated them with combustion-generated ultrafine particles (UFPs) obtained from two different fuel mixtures, namely, pure ethylene and a mixture of ethylene and dimethylfuran (the latter mimicking the combustion of biofuels)...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29123157/the-nod2-receptor-is-crucial-for-immune-responses-towards-new-world-leishmania-species
#9
Jéssica Cristina Dos Santos, Michelle S M A Damen, Marije Oosting, Dirk J de Jong, Bas Heinhuis, Rodrigo Saar Gomes, Carla Santos Araújo, Mihai G Netea, Fátima Ribeiro-Dias, Leo A B Joosten
American Tegumentary Leishmaniasis is a chronic infection caused by Leishmania protozoan. It is not known whether genetic variances in NOD-like receptor (NLR) family members influence the immune response towards Leishmania parasites and modulate intracellular killing. Using functional genomics, we investigated whether genetic variants in NOD1 or NOD2 influence the production of cytokines by human PBMCs exposed to Leishmania. In addition, we examined whether recognition of Leishmania by NOD2 contributes to intracellular killing...
November 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29122594/inhibition-of-the-nlrp3-inflammasome-attenuates-foam-cell-formation-of-thp-1-macrophages-by-suppressing-ox-ldl-uptake-and-promoting-cholesterol-efflux
#10
Liang Chen, Qiying Yao, Siwei Xu, Hongyan Wang, Peng Qu
The NOD-like receptor family, pyrin domain-containing protein 3 (NLRP3) inflammasome plays an important role in the development of atherosclerosis. The activated NLRP3 inflammasome has been reported to promote macrophage foam cell formation, but not all studies have obtained the same result, and how NLRP3 inflammasome is involved in the formation of foam cells remains elusive. We used selective NLRP3 inflammasome inhibitors and NLRP3-deficient THP-1 cells to assess the effect of NLRP3 inflammasome inhibition on macrophage foam cell formation, oxidized low-density lipoprotein (ox-LDL) uptake, esterification, and cholesterol efflux, as well as the expression of associated proteins...
November 6, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29110407/acupuncture-inhibits-txnip-associated-oxidative-stress-and-inflammation-to-attenuate-cognitive-impairment-in-vascular-dementia-rats
#11
Si-Qi Du, Xue-Rui Wang, Wen Zhu, Yang Ye, Jing-Wen Yang, Si-Ming Ma, Cai-Shuo Ji, Cun-Zhi Liu
AIMS: Oxidative stress and inflammation have been implicated in the pathogenesis of vascular dementia (VD). Thioredoxin-interacting protein (TXNIP) plays a vital role in oxidative stress and NOD-like receptor protein 3 (NLRP3) inflammasome activation. There is evidence that acupuncture has an antioxidative and neuroprotective effect in VD. In this study, we investigated whether acupuncture can attenuate cognitive impairment via inhibiting TXNIP-associated oxidative stress and inflammation in VD rats...
November 6, 2017: CNS Neuroscience & Therapeutics
https://www.readbyqxmd.com/read/29103703/anti-inflammatory-capacity-of-lactobacillus-rhamnosus-gg-in-monophasic-variant-salmonella-infected-piglets-is-correlated-with-impeding-nlrp6-mediated-host-inflammatory-responses
#12
Jiao Yu, Yao-Hong Zhu, Gui-Yan Yang, Wei Zhang, Dong Zhou, Jin-Hui Su, Jiu-Feng Wang
In this study, we investigated the effect of Lactobacillus rhamnosus GG strain (LGG) in ameliorating enteritis in newly weaned pigs following challenge with a monophasic variant of Salmonella enterica serovar Typhimurium (serotyped as 4,[5],12:i:-), which has been linked to disease in humans and livestocks over the past 10 years. In weaned pigs, S. enterica serovar 4,[5],12:i:- induced the mRNA expression of toll like receptor (TLR) 5 and TLR4, while increasing interleukin (IL)-8 and IL-6 mRNA expression in the jejunum...
October 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/29100037/dexmedetomidine-promotes-liver-regeneration-in-mice-after-70-partial-hepatectomy-by-suppressing-nlrp3-inflammasome-not-tlr4-nf%C3%AE%C2%BAb
#13
Meihong Lv, Huizhi Zeng, Yi He, Jiashu Zhang, Guang Tan
Inflammasome activation is mediated by NOD-like receptors (NLRs) that play important role in cellular proliferation. NLRP3 senses the widest array of stimuli. But its role in the liver regeneration after partial hepatectomy (PHx) is still unknown. Dexmedetomidine (Dex) has been documented to protect the liver against ischemia-reperfusion injury via the suppression of the TLR4/NF-κB pathway, which is important for NLRP3 inflammasome activation and liver regeneration. We tested whether Dex contributes to liver regeneration, and investigated its consequent effect on inflammasome activation...
October 31, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/29097393/nlrp11-disrupts-mavs-signalosome-to-inhibit-type-i-interferon-signaling-and-virus-induced-apoptosis
#14
Yunfei Qin, Zexiong Su, Yaoxing Wu, Chenglei Wu, Shouheng Jin, Weihong Xie, Wei Jiang, Rongbin Zhou, Jun Cui
MAVS signalosome plays an important role in RIG-I-like receptor (RLR)-induced antiviral signaling. Upon the recognition of viral RNAs, RLRs activate MAVS, which further recruits TRAF6 and other signaling proteins to initiate type I interferon (IFN) activation. MAVS signalosome also regulates virus-induced apoptosis to limit viral replication. However, the mechanisms that control the activity of MAVS signalosome are still poorly defined. Here, we report NLRP11, a Nod-like receptor, is induced by type I IFN and translocates to mitochondria to interact with MAVS upon viral infection...
November 2, 2017: EMBO Reports
https://www.readbyqxmd.com/read/29097227/the-role-of-the-nlrp3-inflammasome-in-regulation-of-antiviral-responses-to-influenza-a-virus-infection
#15
REVIEW
Soroush T Sarvestani, Julie L McAuley
The innate immune system provides the host with both a dynamic barrier to prevent infection and a means to which rapid anti-microbial responses can be mounted. The inflammasome pathway is a critical host early response mechanism that enables detection of pathogens and initiates production of inflammatory cytokines, inducing recruitment of effector cells to the site of infection. The complete mechanism of inflammasome activation requires two signals: an initial priming step upon detection of pathogen, followed by activation of intracellular pattern recognition receptors critical to the formation of the inflammasome complex...
October 31, 2017: Antiviral Research
https://www.readbyqxmd.com/read/29097162/innate-sensing-and-cell-autonomous-resistance-pathways-in-legionella-pneumophila-infection
#16
REVIEW
Jan Naujoks, Juliane Lippmann, Norbert Suttorp, Bastian Opitz
Legionella pneumophila is a facultative intracellular bacterium which can cause a severe pneumonia called Legionnaires' disease after inhalation of contaminated water droplets and replication in alveolar macrophages. The innate immune system is generally able to sense and -in most cases- control L. pneumophila infection. Comorbidities and genetic risk factors, however, can compromise the immune system and high infection doses might overwhelm its capacity, thereby enabling L. pneumophila to grow and disseminate inside the lung...
October 27, 2017: International Journal of Medical Microbiology: IJMM
https://www.readbyqxmd.com/read/29079611/neutrophils-drive-alveolar-macrophage-il-1%C3%AE-release-during-respiratory-viral-infection
#17
Teresa Peiró, Dhiren F Patel, Samia Akthar, Lisa G Gregory, Chloe J Pyle, James A Harker, Mark A Birrell, Clare M Lloyd, Robert J Snelgrove
BACKGROUND: Alveolar macrophages are sentinels of the airways that must exhibit immune restraint to innocuous antigens but elicit a robust inflammatory response to pathogenic threats. How distinction between these dichotomous functions is controlled is poorly defined.Neutrophils are the first responders to infection, and we hypothesised that they may free alveolar macrophages from their hyporesponsive state, promoting their activation. Activation of the inflammasome and interleukin (IL)-1β release is a key early inflammatory event that must be tightly regulated...
October 27, 2017: Thorax
https://www.readbyqxmd.com/read/29078913/naloxone-inhibits-nod-like-receptor-protein-3-inflammasome
#18
Han-Yu Lin, Ya-Ying Chang, Ming-Chang Kao, Chun-Jen Huang
BACKGROUND: Naloxone, an opioid receptor antagonist, possesses potent anti-inflammation effects. We previously confirmed the effects of naloxone on inhibiting upregulation of inflammatory cytokine interleukin-1β (IL-1β). Production of mature form IL-1β is mediated by the nod-like receptor protein 3 (NLRP3) inflammasome, a multiprotein complex composed of NLRP3, and the adaptor protein apoptosis-associated speck-like protein contains a caspase recruitment domain (ASC). We elucidated whether naloxone could inhibit the activation of NLRP3 inflammasome...
November 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/29070585/nlrc5-deficiency-ameliorates-diabetic-nephropathy-through-alleviating-inflammation
#19
Peipei Luan, Jianhui Zhuang, Jun Zou, Hailing Li, Ping Shuai, Xiaopeng Xu, Yifan Zhao, Wenxin Kou, Shuya Ji, Ai Peng, Yawei Xu, Qing Su, Weixia Jian, Wenhui Peng
NOD-like receptor family caspase recruitment domain family domain containing 5 (NLRC5) has important roles in inflammation and innate immunity. NLRC5 was highly expressed in kidney from streptozotocin-induced diabetic mice, db/db mice and patients with diabetes. Based on that evidence, the present study was designed to explore the roles of NLRC5 in the progression of diabetic nephropathy (DN). We examined kidney injury, including inflammation and fibrosis in Nlrc5 gene knockout (Nlrc5(-/-)) and wild-type (WT) diabetic mice...
October 25, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29069583/shrna-interference-of-nlrp3-inflammasome-alleviate-ischemia-reperfusion-induced-myocardial-damage-through-autophagy-activation
#20
Zhu Meng, Mei-Yan Song, Chuan-Fang Li, Jia-Qi Zhao
Myocardial ischemia-reperfusion (I/R) injury always occur during the recovery of myocardial blood supply with high morbidity and mortality. Although, various therapeutic schedules were applied in clinic, there are real problems that have to be resolved on curative effect. Nod-like receptor protein 3 (NLRP3) inflammasome has moderation effects on cellular damage and inflammatory reaction after I/R injury. Our research aims to investigate a more effective approach to restrain the activation of NLRP3 inflammasome in treating myocardial I/R injury...
October 22, 2017: Biochemical and Biophysical Research Communications
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