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https://www.readbyqxmd.com/read/27906023/surface-area-dependence-of-gas-particle-interactions-influences-pulmonary-and-neuroinflammatory-outcomes
#1
Christina R Tyler, Katherine E Zychowski, Bethany N Sanchez, Valeria Rivero, Selita Lucas, Guy Herbert, June Liu, Hammad Irshad, Jacob D McDonald, Barry E Bleske, Matthew J Campen
BACKGROUND: Deleterious consequences of exposure to traffic emissions may derive from interactions between carbonaceous particulate matter (PM) and gaseous components in a manner that is dependent on the surface area or complexity of the particles. To determine the validity of this hypothesis, we examined pulmonary and neurological inflammatory outcomes in C57BL/6 and apolipoprotein E knockout (ApoE(-/-)) male mice after acute and chronic exposure to vehicle engine-derived particulate matter, generated as ultrafine (UFP) and fine (FP) sizes, with additional exposures using UFP or FP combined with gaseous copollutants derived from fresh gasoline and diesel emissions, labeled as UFP + G and FP + G...
December 1, 2016: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/27902740/extensive-characterization-and-comparison-of-endothelial-cells-derived-from-dermis-and-adipose-tissue-potential-use-in-tissue-engineering
#2
Hanneke N Monsuur, Ester M Weijers, Frank B Niessen, Amit Gefen, Pieter Koolwijk, Susan Gibbs, Lenie J van den Broek
Tissue-engineered constructs need to become quickly vascularized in order to ensure graft take. One way of achieving this is to incorporate endothelial cells (EC) into the construct. The adipose tissue stromal vascular fraction (adipose-SVF) might provide an alternative source for endothelial cells as adipose tissue can easily be obtained by liposuction. Since adipose-EC are now gaining more interest in tissue engineering, we aimed to extensively characterize endothelial cells from adipose tissue (adipose-EC) and compare them with endothelial cells from dermis (dermal-EC)...
2016: PloS One
https://www.readbyqxmd.com/read/27900586/role-of-prolactin-in-promotion-of-immune-cell-migration-into-the-mammary-gland
#3
Riva Dill, Ameae M Walker
Immune cells in the mammary gland play a number of important roles, including protection against infection during lactation and, after passing into milk, modulation of offspring immunity. However, little is known about the mechanism of recruitment of immune cells to the lactating gland in the absence of infection. Given the importance of prolactin to other aspects of lactation, we hypothesized it would also play a role in immune cell recruitment. Prolactin treatment of adult female mice for a period equivalent to pregnancy and the first week of lactation increased immune cell flux through the mammary gland, as reflected in the number of immune cells in mammary gland-draining, but not other lymph nodes...
November 29, 2016: Journal of Mammary Gland Biology and Neoplasia
https://www.readbyqxmd.com/read/27889626/absence-of-kynurenine-3-monooxygenase-reduces-mortality-of-acute-viral-myocarditis-in-mice
#4
Hisako Kubo, Masato Hoshi, Akihiro Mouri, Chieko Tashita, Yasuko Yamamoto, Toshitaka Nabeshima, Kuniaki Saito
Infection of the encephalomyocarditis virus (EMCV) in mice is an established model for viral myocarditis. Previously, we have demonstrated that indoleamine 2,3-dioxygenase (IDO), an L-tryptophan - kynurenine pathway (KP) enzyme, affects acute viral myocarditis. However, the roles of KP metabolites in EMCV infection remain unclear. Kynurenine 3-monooxygenase (KMO) is one of the key regulatory enzymes, which metabolizes kynurenine to 3-hydroxykynurenine in the KP. Therefore, we examined the role of KMO in acute viral infection by comparing between KMO(-/-) mice and KMO(+/+) mice...
November 23, 2016: Immunology Letters
https://www.readbyqxmd.com/read/27888521/cancer-associated-mesenchymal-stroma-fosters-the-stemness-of-osteosarcoma-cells-in-response-to-intratumoral-acidosis-via-nf-%C3%AE%C2%BAb-acivation
#5
Sofia Avnet, Gemma Di Pompo, Tokuhiro Chano, Costantino Errani, Arig Ibrahim-Hashim, Robert J Gillies, Davide Maria Donati, Nicola Baldini
The role of mesenchymal stem cells (MSC) in osteosarcoma (OS), the most common primary tumor of bone, has not been extensively elucidated. We have recently shown that OS is characterized by interstitial acidosis, a microenvironmental condition that is similar to a wound setting, in which mesenchymal reactive cells are activated to release mitogenic and chemotactic factors. We therefore intended to test the hypothesis that, in OS, acid-activated MSC influence tumor cell behavior. Conditioned media or co-culture with normal MSC previously incubated with short-term acidosis (pH 6...
November 26, 2016: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/27884600/steaps-comprise-a-novel-inflammatory-nexus-in-pustular-skin-disorders
#6
Yun Liang, Xianying Xing, Maria A Beamer, William R Swindell, Mrinal K Sarkar, Liza Wolterink Roberts, John J Voorhees, J Michelle Kahlenberg, Paul W Harms, Andrew Johnston, Johann E Gudjonsson
BACKGROUND: Pustular skin disorders are a category of difficult-to-treat and potentially life threatening conditions that involve the appearance of neutrophil rich pustules. The molecular basis of most pustular skin conditions has remained unknown. OBJECTIVE: We sought to investigate the molecular basis of three pustular skin disorders, generalized pustular psoriasis (GPP), palmoplantar pustulosis (PPP), and acute generalized exanthematous pustulosis (AGEP). METHODS: Microarray analyses were performed to profile genome-wide gene expression of skin biopsies obtained from GPP, PPP, AGEP patients and normal controls...
November 21, 2016: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/27883091/mycobacterium-tuberculosis-triggered-hippo-pathway-orchestrates-cxcl1-2-expression-to-modulate-host-immune-responses
#7
Monoranjan Boro, Vikas Singh, Kithiganahalli Narayanaswamy Balaji
Mycobacterium tuberculosis (Mtb) pathogenesis encompasses a plethora of finely regulated alterations within the host which eventually coin the outcome of infection. Chemokines are important components in directing immune cell recruitment to the site of infection, and shaping the disease progression. Here, we demonstrate that Hippo (mammalian sterile 20-like 1 and 2 kinases, MST1/2, in mammals), is activated during mycobacterial infection in a toll-like receptor (TLR) 2-interleukin receptor-1 associated kinases (IRAK1/4)-dependent manner...
November 24, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27867403/in-vitro-tnf-%C3%AE-inhibitory-activity-of-brazilian-plants-and-anti-inflammatory-effect-of-stryphnodendron-adstringens-in-an-acute-arthritis-model
#8
Bárbara O Henriques, Olívia Corrêa, Elaine Patrícia C Azevedo, Rodrigo M Pádua, Vívian Louise S de Oliveira, Thiago Henrique C Oliveira, Daiane Boff, Ana Carolina F Dias, Danielle G de Souza, Flávio A Amaral, Mauro M Teixeira, Rachel O Castilho, Fernão C Braga
Stryphnodendron species, popularly named "barbatimão," are traditionally used in Brazil as anti-inflammatory agents. This study aimed to investigate the effect of barbatimão and 11 other species on the production of tumor necrosis factor-alpha (TNF-α) in lipopolysaccharide- (LPS-) stimulated THP-1 cells, as well as their anti-arthritis activity. The extracts of Stryphnodendron adstringens, Stryphnodendron obovatum, Campomanesia lineatifolia, and Terminalia glabrescens promoted a concentration-dependent inhibition of TNF-α...
2016: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/27832972/cxcl1-from-tumor-associated-lymphatic-endothelial-cells-drives-gastric-cancer-cell-into-lymphatic-system-via-activating-integrin-%C3%AE-1-fak-akt-signaling
#9
Zhixiong Wang, Zhao Wang, Guanghua Li, Hui Wu, Kaiyu Sun, Jianhui Chen, Yun Feng, Chuangqi Chen, Shirong Cai, Jianbo Xu, Yulong He
Crosstalk between lymphatic endothelial cells (LECs) and tumor cells in the tumor microenvironment plays a crucial role in tumor metastasis. Our previous study indicated chemokine (C-X-C motif) ligand 1 (CXCL1) from LECs stimulates the metastasis of gastric cancer. However, the mechanism is still unclear. Here, we successfully isolated tumor-associated LECs (T-LECs) and normal LECs (N-LECs) from clinical samples by magnetic-activated cell sorting system (MACS) and proved that CXCL1 expression was elevated in T-LECs compared with N-LECs in situ and vitro...
November 8, 2016: Cancer Letters
https://www.readbyqxmd.com/read/27832827/human-brain-chemokine-and-cytokine-expression-in-sepsis-a-report-of-three-cases
#10
Jordan Warford, Anna-Claire Lamport, Barry Kennedy, Alexander S Easton
BACKGROUND: Sepsis is a systemic response to infection that can affect brain function by inducing resident cells (including astrocytes and microglia) to generate brain chemokines and cytokines. However, there are few studies on the human brain. Since this information may shed further light on pathogenesis, our study objective was to measure the expression of 36 chemokines and cytokines in autopsied brain from 3 cases of sepsis and 10 controls, and to relate this to astrocyte and microglial activation...
November 11, 2016: Canadian Journal of Neurological Sciences. le Journal Canadien des Sciences Neurologiques
https://www.readbyqxmd.com/read/27826542/characterization-of-innate-immune-responses-of-human-endothelial-cells-induced-by-porphyromonas-gingivalis-and-their-derived-outer-membrane-vesicles
#11
Meng-Hsuan Ho, Zhong-Mao Guo, Julio Chunga, J Shawn Goodwin, Hua Xie
Atherosclerosis, a chronic inflammatory disease of the blood vessels, is one of the most common causes of morbidity and mortality world-wide. Involvement of Porphyromonas gingivalis in atherosclerosis is supported by observations from epidemiological, clinical, immunological, and molecular studies. Previously we reported that P. gingivalis vesicles have a much higher invasive efficiency than their originating cells. Here, we further compare the role of P. gingivalis cells and their vesicles in expression of chemoattractant proteins including CXCL1, CXCL2, and CXCL8, and adhesive molecules such as E-selectin in human umbilical vein endothelial cells (HUVECs)...
2016: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/27823622/main-pathways-of-action-of-brazilian-red-propolis-on-the-modulation-of-neutrophils-migration-in-the-inflammatory-process
#12
Bruno Bueno-Silva, Marcelo Franchin, Claudiney de Freitas Alves, Carina Denny, David Fernando Colón, Thiago Mattar Cunha, Severino Matias Alencar, Marcelo Henrique Napimoga, Pedro Luiz Rosalen
BACKGROUND: Brazilian propolis is popularly used as treatment for different diseases including the ones with inflammatory origin. Brazilian red propolis chemical profile and its anti-inflammatory properties were recently described however, its mechanism of action has not been investigated yet. AIM: Elucidate Brazilian red propolis major pathways of action on the modulation of neutrophil migration during the inflammatory process. METHODS: The ethanolic extract of propolis (EEP) activity was investigated for neutrophil migration into the peritoneal cavity, intravital microscopy (rolling and adhesion of leukocytes), quantification of cytokines TNF-α, IL-1β and chemokines CXCL1/KC, CXCL2/MIP-2, neutrophil chemotaxis induced by CXCL2/MIP-2, calcium influx and CXCR2 expression on neutrophils...
December 1, 2016: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/27822408/microarray-expression-profiling-identifies-genes-including-cytokines-and-biofunctions-as-diapedesis-associated-with-a-brain-metastasis-from-a-papillary-thyroid-carcinoma
#13
Hans-Juergen Schulten, Deema Hussein, Fatima Al-Adwani, Sajjad Karim, Jaudah Al-Maghrabi, Mona Al-Sharif, Awatif Jamal, Sherin Bakhashab, Jolanta Weaver, Fahad Al-Ghamdi, Saleh S Baeesa, Mohammed Bangash, Adeel Chaudhary, Mohammed Al-Qahtani
Brain metastatic papillary thyroid carcinomas (PTCs) are afflicted with unfavorable prognosis; however, the underlying molecular genetics of these rare metastases are virtually unknown. In this study, we compared whole transcript microarray expression profiles of a BRAF mutant, brain metastasis from a PTC, including its technical replicate (TR), with eight non-brain metastatic PTCs and eight primary brain tumors. The top 95 probe sets (false discovery rate (FDR) p-value < 0.05 and fold change (FC) > 2) that were differentially expressed between the brain metastatic PTC, including the TR, and both, non-brain metastatic PTCs and primary brain tumors were in the vast majority upregulated and comprise, e...
2016: American Journal of Cancer Research
https://www.readbyqxmd.com/read/27821588/smooth-muscle-cell-pro-angiogenic-phenotype-induced-by-cyclopentenyl-cytosine-promotes-endothelial-cell-proliferation-and-migration
#14
Rui Tang, Gui Zhang, Shi-You Chen
Vascular smooth muscle cells (SMCs) and endothelial cells (ECs) have a close contact with the blood vessel. SMC phenotypes can be altered during pathological vascular remodeling. However, how SMC phenotypes affect EC properties remain largely unknown. In the present study, we found that platelet-derived growth factor (PDGF)-BB-induced synthetic SMC suppressed EC proliferation and migration while exhibiting an increased expression of anti-angiogenic factors such as endostatin and decreased pro-angiogenic factors including C-X-C motif ligand 1 (CXCL1)...
November 7, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27820779/bruton-s-tyrosine-kinase-inhibition-attenuates-liver-damage-in-a-mouse-warm-ischemia-and-reperfusion-model
#15
T Palumbo, K Nakamura, C Lassman, Y Kidani, S J Bensinger, R W Busuttil, J W Kupiec-Weglinski, A Zarrinpar
BACKGROUND: Bruton's tyrosine kinase (Btk) is a central player in multiple signaling pathways of lymphoid and myeloid cells. Myeloid cells are crucial early effectors in organ ischemia/reperfusion injury (IRI). BTKB66 is a selective, irreversible inhibitor of Btk. In this study, we hypothesized that Btk inhibition would reduce hepatocellular injury in a murine model of liver warm hepatic ischemia and reperfusion. METHODS: First, BTKB66 was tested in in vitro models of LPS-mediated neutrophil and macrophage activation...
November 3, 2016: Transplantation
https://www.readbyqxmd.com/read/27819273/neovestitol-an-isoflavonoid-isolated-from-brazilian-red-propolis-reduces-acute-and-chronic-inflammation-involvement-of-nitric-oxide-and-il-6
#16
Marcelo Franchin, David F Colón, Marcos G da Cunha, Fernanda V S Castanheira, André L L Saraiva, Bruno Bueno-Silva, Severino M Alencar, Thiago M Cunha, Pedro L Rosalen
Isoflavonoids have been largely studied due to their distinct biological activities identified thus far. Herein, we evaluated the activity of neovestitol, an isoflavonoid isolated from Brazilian red propolis, in acute and chronic inflammation. As for acute inflammation, we found that neovestitol reduced neutrophil migration, leukocyte rolling and adhesion, as well as expression of ICAM-1 in the mesenteric microcirculation during lipopolysaccharide-induced acute peritonitis. No changes were observed in the levels of TNF-α, CXCL1/KC and CXCL2/MIP-2 upon pretreatment with neovestitol...
November 7, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27818315/il-20-promotes-epithelial-healing-of-the-injured-mouse-cornea
#17
Wanyu Zhang, Sri Magadi, Zhijie Li, C Wayne Smith, Alan R Burns
After corneal epithelial injury, the ensuing inflammatory response is necessary for efficient wound healing. While beneficial healing effects are attributed to recruited neutrophils and platelets, dysregulated inflammation (too little or too much) is associated with impaired wound healing. The purpose of this study was to use an established C57BL/6J mouse model of corneal injury to evaluate the potential modulatory role of interleukin-20 (IL-20) on the inflammatory and healing responses to epithelial wounding...
November 3, 2016: Experimental Eye Research
https://www.readbyqxmd.com/read/27818230/effect-of-ppar-%C3%AE-%C3%AE-agonist-gw0742-treatment-in-the-acute-phase-response-and-blood-brain-barrier-permeability-following-brain-injury
#18
Khouloud Chehaibi, Laura le Maire, Sarah Bradoni, Joan Carles Escola, Francisco Blanco-Vaca, Mohamed Naceur Slimane
The systemic response to ischemic stroke is associated with the hepatic acute phase response (APR) that modulates leukocytes recruitment to the injured brain. The inappropriate recruitment of leukocytes to the brain parenchyma can result in blood-brain barrier (BBB) breakdown. Emerging data suggest that peroxisome proliferator-activated receptor beta/delta (PPAR-β/δ) activation has a potential neuroprotective role in ischemic stroke. However, mechanisms of PPAR-β/δ mediated protection in ischemic insults remain unclear...
October 18, 2016: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/27815425/stat6-regulates-the-development-of-eosinophilic-versus-neutrophilic-asthma-in-response-to-alternaria-alternata
#19
Andrea C Valladao, Charles W Frevert, Lisa K Koch, Daniel J Campbell, Steven F Ziegler
Human asthma is a heterogeneous disease characterized by the expression of both Th2 and Th17 cytokines. In vitro and in vivo studies have shown a reciprocal regulation between Th2 and Th17 pathways, suggesting a potential induction of neutrophil-promoting Th17 inflammation in the absence of a Th2 response. Alternaria alternata is a clinically relevant allergen that is associated with severe and fatal asthma exacerbations. Exposure to A. alternata is characterized by a predominant Th2 response, but can also induce the production of factors associated with Th17 responses (e...
November 4, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27815259/aging-exacerbates-acute-lung-injury-induced-changes-of-the-air-blood-barrier-lung-function-and-inflammation-in-the-mouse
#20
Katharina Maria Kling, Elena Lopez-Rodriguez, Christiane Pfarrer, Christian Mühlfeld, Christina Brandenberger
Acute lung injury (ALI) is characterized by hypoxemia, enhanced permeability of the air-blood barrier and pulmonary edema. Particularly in the elderly ALI is associated with increased morbidity and mortality. The reasons for this, however, are poorly understood. We hypothesized that age-related changes in pulmonary structure, function and inflammation, lead to a worse prognosis in ALI. ALI was induced in young (2 months) and old (18 months) male C57BL/6 mice by intranasal application of 2.5 mg lipopolysaccharide (LPS)/kg body weight or saline (control mice)...
November 4, 2016: American Journal of Physiology. Lung Cellular and Molecular Physiology
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