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Environmental ilnesses

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https://www.readbyqxmd.com/read/27916659/stronger-hypothalamus-pituitary-adrenal-axis-habituation-predicts-lesser-sensitization-of-inflammatory-response-to-repeated-acute-stress-exposures-in-healthy-young-adults
#1
Myriam V Thoma, Danielle Gianferante, Luke Hanlin, Alexander Fiksdal, Chen Xuejie, Nicolas Rohleder
Effective adjustment of the stress systems to repeated stress is regarded as an adaptive response of the organism facing environmental threats. Given the intertwined relationship between the stress systems and the inflammatory system, it could be expected that inflammatory processes should adapt to repeated stress as well. However, only little is known about adaptational processes of the different components of the immune system in response to repeated stress, and how these might be related to adaptational processes of the hypothalamus-pituitary-adrenal (HPA) axis...
December 1, 2016: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27913196/nf-kb-regulated-exosomal-mir-155-promotes-the-inflammation-associated-with-arsenite-carcinogenesis
#2
Chao Chen, Fei Luo, Xinlu Liu, Lu Lu, Hui Xu, Qianlei Yang, Junchao Xue, Le Shi, Jun Li, Aihua Zhang, Qizhan Liu
In the cancer microenvironment, extracellular communication allows various types of cells to coordinate and execute biological functions. Emerging evidence indicates that exosomes, as mediators of cell communication, are involved in tumor progression. Little is known, however, about the mechanism by which exosomal miRNAs regulate inflammatory infiltration in arsenite-induced liver cancer. The present research aimed to determine if miRNAs secreted from arsenite-transformed human hepatic epithelial (L-02) cells are transferred into normal L-02 and THLE-3 cells, which are functionally active in the recipient cells...
November 30, 2016: Cancer Letters
https://www.readbyqxmd.com/read/27911806/permissive-roles-of-cytokines-interleukin-7-and-flt3-ligand-in-mouse-b-cell-lineage-commitment
#3
Lilly von Muenchow, Llucia Alberti-Servera, Fabian Klein, Giuseppina Capoferri, Daniela Finke, Rhodri Ceredig, Antonius Rolink, Panagiotis Tsapogas
Hematopoietic cells are continuously generated throughout life from hematopoietic stem cells, thus making hematopoiesis a favorable system to study developmental cell lineage commitment. The main factors incorporating environmental signals to developing hematopoietic cells are cytokines, which regulate commitment of hematopoietic progenitors to the different blood lineages by acting either in an instructive or a permissive manner. Fms-like tyrosine kinase-3 (Flt3) ligand (FL) and Interleukin-7 (IL-7) are cytokines pivotal for B-cell development, as manifested by the severely compromised B-cell development in their absence...
November 29, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27906146/peanut-skin-extract-mediated-synthesis-of-gold-nanoparticles-silver-nanoparticles-and-gold-silver-bionanocomposites-for-electrochemical-sudan-iv-sensing
#4
Alok Pani, Tran Duy Thanh, Nam Hoon Kim, Joong Hee Lee, Soon-Il Yun
Sustainable methods are needed for rapid and efficient detection of environmental and food pollutants. The Sudan group of dyes has been used extensively as adulterants in food and also are found to be polluting the soil and water bodies. There have been several methods for detection of Sudan dyes, but most of them are not practical enough for common use. In this study, the electrochemical detection efficiency and stability of gold nanoparticle (AuNPs), silver NPs and Au-Ag bionanocomposites, synthesised by peanut skin extract, modified glassy carbon electrode has been investigated...
December 2016: IET Nanobiotechnology
https://www.readbyqxmd.com/read/27905154/epitaxially-self-assembled-alkane-layers-for-graphene-electronics
#5
Young-Jun Yu, Gwan-Hyoung Lee, Ji Il Choi, Yoon Su Shim, Chul-Ho Lee, Seok Ju Kang, Sunwoo Lee, Kwang Taeg Rim, George W Flynn, James Hone, Yong-Hoon Kim, Philip Kim, Colin Nuckolls, Seokhoon Ahn
The epitaxially grown alkane layers on graphene are prepared by a simple drop-casting method and greatly reduce the environmentally driven doping and charge impurities in graphene. Multiscale simulation studies show that this enhancement of charge homogeneity in graphene originates from the lifting of graphene from the SiO2 surface toward the well-ordered and rigid alkane self-assembled layers.
December 1, 2016: Advanced Materials
https://www.readbyqxmd.com/read/27905107/co-operative-suppression-of-inflammatory-responses-in-human-dendritic-cells-by-plant-proanthocyanidins-and-products-from-the-parasitic-nematode-trichuris-suis
#6
Andrew R Williams, Elsenoor J Klaver, Lisa C Laan, Aina Ramsay, Christos Fryganas, Rolf Difborg, Helene Kringel, Jess D Reed, Irene Mueller-Harvey, Søren Skov, Irma van Die, Stig M Thamsborg
Interactions between dendritic cells (DCs) and environmental, dietary and pathogen antigens play a key role in immune homeostasis and regulation of inflammation. Dietary polyphenols such as proanthocyanidins (PAC) may reduce inflammation, and we therefore hypothesized that PAC may suppress lipopolysaccharide (LPS) -induced responses in human DCs and subsequent T helper type 1 (Th1) -type responses in naive T cells. Moreover, we proposed that, because DCs are likely to be exposed to multiple stimuli, the activity of PAC may synergise with other bioactive molecules that have anti-inflammatory activity, e...
November 7, 2016: Immunology
https://www.readbyqxmd.com/read/27900676/functional-implications-of-the-il-23-il-17-immune-axis-in-schizophrenia
#7
REVIEW
Monojit Debnath, Michael Berk
The aetiology of schizophrenia seems to stem from complex interactions amongst environmental, genetic, metabolic, immunologic and oxidative components. Chronic low-grade inflammation has been persistently linked to schizophrenia, and this has primarily been based on the findings derived from Th1/Th2 cytokine balance. While the IL-23/IL-17 axis plays crucial role in the pathogenesis of several immune-mediated disorders, it has remained relatively unexplored in neuropsychiatric disorders. Altered levels of cytokines related to IL-23/IL-17 axis have been observed in schizophrenia patients in a few studies...
November 29, 2016: Molecular Neurobiology
https://www.readbyqxmd.com/read/27899224/interleukin-7-and-15-maintain-pathogenic-memory-th17-cells-in-autoimmunity
#8
Yihe Chen, Sunil K Chauhan, Xuhua Tan, Reza Dana
Th17 cells are principal mediators of many autoimmune conditions. Recently, memory Th17 cells have been revealed as crucial in mediating the chronicity of various refractory autoimmune disorders; however, the underlying mechanisms maintaining memory Th17 cells have remained elusive. Here, using a preclinical model of ocular autoimmune disease we show that both IL-7 and IL-15 are critical for maintaining pathogenic memory Th17 cells. Neutralization of these cytokines leads to substantial reduction of memory Th17 cells; both IL-7 and IL-15 provide survival signals via activating STAT5, and IL-15 provides additional proliferation signals via activating both STAT5 and Akt...
November 26, 2016: Journal of Autoimmunity
https://www.readbyqxmd.com/read/27887617/increased-expression-of-trop2-in-airway-basal-cells-potentially-contributes-to-airway-remodeling-in-chronic-obstructive-pulmonary-disease
#9
Qixiao Liu, Haijun Li, Qin Wang, Yuke Zhang, Wei Wang, Shuang Dou, Wei Xiao
BACKGROUND: The airway epithelium of chronic obstructive pulmonary disease (COPD) patients undergoes aberrant repair and remodeling after repetitive injury following exposure to environmental factors. Abnormal airway regeneration observed in COPD is thought to originate in the stem/progenitor cells of the airway epithelium, the basal cells (BCs). However, the molecular mechanisms underlying these changes remain unknown. Here, trophoblast cell surface antigen 2 (TROP2), a protein implicated in the regulation of stem cell activity, was examined in lung tissue samples from COPD patients...
November 25, 2016: Respiratory Research
https://www.readbyqxmd.com/read/27886801/approach-to-the-patients-with-inadequate-response-to-colchicine-in-familial-mediterranean-fever
#10
REVIEW
Ahmet Gül
Familial Mediterranean fever (FMF) is the most common form of monogenic autoinflammatory conditions, and response to colchicine has been considered as one of its distinctive features among other hereditary periodic fever disorders. Prophylactic colchicine has been shown to be effective in the prevention of inflammatory attacks and development of amyloidosis. However, the highest tolerable doses of colchicine may not be adequate enough to manage these goals in approximately 5% of FMF patients. Inadequate response to colchicine in fully compliant FMF patients may be associated with genetic and/or environmental factors affecting disease severity and colchicine bioavailability...
April 2016: Best Practice & Research. Clinical Rheumatology
https://www.readbyqxmd.com/read/27885273/fatty-acid-binding-protein-fabp4-mechanistically-links-obesity-with-aggressive-aml-by-enhancing-aberrant-dna-methylation-in-aml-cells
#11
F Yan, N Shen, J X Pang, Y W Zhang, E Y Rao, A M Bode, A Al-Kali, D E Zhang, M R Litzow, B Li, S J Liu
Obesity is becoming more prevalent worldwide and is a major risk factor for cancer development. Acute myeloid leukemia (AML), the most common acute leukemia in adults, remains a frequently fatal disease. Here we investigated the molecular mechanisms by which obesity favors AML growth and uncovered the fatty acid-binding protein 4 (FABP4) and DNA methyltransferase 1 (DNMT1) regulatory axis that mediates aggressive AML in obesity. We showed that leukemia burden was much higher in high-fat diet-induced obese mice, which had higher levels of FABP4 and interleukin (IL)-6 in the sera...
December 2, 2016: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/27875245/aryl-hydrocarbon-receptor-is-required-for-optimal-b-cell-proliferation
#12
Matteo Villa, Manolis Gialitakis, Mauro Tolaini, Helena Ahlfors, Colin J Henderson, C Roland Wolf, Robert Brink, Brigitta Stockinger
The aryl hydrocarbon receptor (AhR), a transcription factor known for mediating xenobiotic toxicity, is expressed in B cells, which are known targets for environmental pollutants. However, it is unclear what the physiological functions of AhR in B cells are. We show here that expression of Ahr in B cells is up-regulated upon B-cell receptor (BCR) engagement and IL-4 treatment. Addition of a natural ligand of AhR, FICZ, induces AhR translocation to the nucleus and transcription of the AhR target gene Cyp1a1, showing that the AhR pathway is functional in B cells...
November 14, 2016: EMBO Journal
https://www.readbyqxmd.com/read/27872193/critical-contribution-of-nuclear-factor-erythroid-2-related-factor-2-nrf2-to-electrophile-induced-interleukin-11-production
#13
Takashi Nishina, Yutaka Deguchi, Ryosuke Miura, Soh Yamazaki, Yasuhiro Shinkai, Yuko Kojima, Ko Okumura, Yoshito Kumagai, Hiroyasu Nakano
Nuclear factor erythroid 2-related factor 2 (NRF2) is a transcription factor that plays a crucial role in protection of cells from electrophile-induced toxicity through upregulating phase II detoxifying enzymes and phase III transporters. We previously reported that oxidative stress induces upregulation of interleukin-11 (IL-11), a member of the IL-6 family that ameliorates acetaminophen-induced liver toxicity. However, a role for IL-11 in protection of cells from electrophile-induced toxicity remains unclear...
November 21, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27871981/oral-exposure-to-diisodecyl-phthalate-aggravates-allergic-dermatitis-by-oxidative-stress-and-enhancement-of-thymic-stromal-lymphopoietin
#14
Shiping Shen, Jinquan Li, Huihui You, Zhuo Wu, Yang Wu, Yun Zhao, Yuqing Zhu, Qing Guo, Xiaoxiao Li, Rui Li, Ping Ma, Xu Yang, Mingqing Chen
Diisodecyl phthalate (DIDP) is extensively used as an environmentally friendly plasticizer. However, little is known about the adverse effects and the underlying mechanisms of DIDP exposure on immunological diseases. We aimed to determine the role and mechanisms of DIDP exposure in allergic contact dermatitis-like skin lesions. We show that oral DIDP exposure can aggravate allergic dermatitis in mice. Moreover, an increase of ROS, total serum IgE and IL-4 levels were concomitant with this deterioration. We detected the expression of Thymic stromal lymphopoietin (TSLP) and the activation of STATs and NF-κB signal pathways...
November 18, 2016: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/27867043/acute-social-stress-induced-immunomodulation-in-pigs-high-and-low-responders-to-acth
#15
Elodie Bacou, Karine Haurogné, Grégoire Mignot, Marie Allard, Laurence De Beaurepaire, Jordan Marchand, Elena Terenina, Yvon Billon, Julien Jacques, Jean-Marie Bach, Pierre Mormède, Julie Hervé, Blandine Lieubeau
Pig husbandry is known as an intensive breeding system, piglets being submitted to multiple stressful events such as early weaning, successive mixing, crowding and shipping. These stressors are thought to impair immune defences and might contribute, at least partly, to the prophylactic use of antibiotics. Robustness was recently defined as the ability of an individual to express a high-production potential in a wide variety of environmental conditions. Increasing robustness thus appears as a valuable option to improve resilience to stressors and could be obtained by selecting piglets upon their adrenocortical activity...
November 17, 2016: Physiology & Behavior
https://www.readbyqxmd.com/read/27865205/human-hepatic-stellate-cells-and-inflammation-a-regulated-cytokine-network-balance
#16
Mehdi Najar, Hussein Fayyad-Kazan, Wissam H Faour, Adil El Taghdouini, Gordana Raicevic, Mustapha Najimi, Michel Toungouz, Leo A van Grunsven, Etienne Sokal, Laurence Lagneaux
AIM: Uncertainty about the safety of cell therapy continues to be a major challenge to the medical community. Inflammation and the associated immune response represent a major safety concern hampering the development of long-term clinical therapy. In vivo interactions between the cell graft and the host immune system are mediated by functional environmental sensors and stressors that play significant roles in the immunobiology of the graft. Within this context, human liver stellate cells (HSC) demonstrated marked immunological plasticity that has main importance for future liver cell therapy application...
November 16, 2016: Cytokine
https://www.readbyqxmd.com/read/27861126/gut-microbiota-influences-pathological-angiogenesis-in-obesity-driven-choroidal-neovascularization
#17
Elisabeth Mma Andriessen, Ariel M Wilson, Gaelle Mawambo, Agnieszka Dejda, Khalil Miloudi, Florian Sennlaub, Przemyslaw Sapieha
Age-related macular degeneration in its neovascular form (NV AMD) is the leading cause of vision loss among adults above the age of 60. Epidemiological data suggest that in men, overall abdominal obesity is the second most important environmental risk factor after smoking for progression to late-stage NV AMD To date, the mechanisms that underscore this observation remain ill-defined. Given the impact of high-fat diets on gut microbiota, we investigated whether commensal microbes influence the evolution of AMD Using mouse models of NV AMD, microbiotal transplants, and other paradigms that modify the gut microbiome, we uncoupled weight gain from confounding factors and demonstrate that high-fat diets exacerbate choroidal neovascularization (CNV) by altering gut microbiota...
December 1, 2016: EMBO Molecular Medicine
https://www.readbyqxmd.com/read/27853507/developing-food-allergy-a-potential-immunologic-pathway-linking-skin-barrier-to-gut
#18
REVIEW
Yui-Hsi Wang
Immunoglobulin E (IgE)-mediated food allergy is an adverse reaction to foods and is driven by uncontrolled type-2 immune responses. Current knowledge cannot explain why only some individuals among those with food allergy are prone to develop life-threatening anaphylaxis. It is increasingly evident that the immunologic mechanisms involved in developing IgE-mediated food allergy are far more complex than allergic sensitization. Clinical observations suggest that patients who develop severe allergic reactions to food are often sensitized through the skin in early infancy...
2016: F1000Research
https://www.readbyqxmd.com/read/27853192/doxycycline-metronidazole-and-isotretinoin-do-they-modify-microrna-mrna-expression-profiles-and-function-in-murine-t-cells
#19
Eugenia Becker, Susan Bengs, Sirisha Aluri, Lennart Opitz, Kirstin Atrott, Claudia Stanzel, Pedro A Ruiz Castro, Gerhard Rogler, Isabelle Frey-Wagner
Inflammatory bowel disease (IBD) may develop due to an inflammatory response to commensal gut microbiota triggered by environmental factors in a genetically susceptible host. Isotretinoin (acne therapy) has been inconsistently associated with IBD onset and flares but prior treatment with antibiotics, also associated with IBD development, complicates the confirmation of this association. Here we studied in mice whether doxycycline, metronidazole or isotretinoin induce epigenetic modifications, and consequently change T-cell mRNA expression and/or function directly after treatment and after a 4 week recovery period...
November 17, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27853178/dendritic-cell-elicited-b-cell-activation-fosters-immune-privilege-via-il-10-signals-in-hepatocellular-carcinoma
#20
Fang-Zhu Ouyang, Rui-Qi Wu, Yuan Wei, Rui-Xian Liu, Dong Yang, Xiao Xiao, Limin Zheng, Bo Li, Xiang-Ming Lao, Dong-Ming Kuang
B cells are prominent components of human solid tumours, but activation status and functions of these cells in human cancers remain elusive. Here we establish that over 50% B cells in hepatocellular carcinoma (HCC) exhibit an FcγRII(low/-) activated phenotype, and high infiltration of these cells positively correlates with cancer progression. Environmental semimature dendritic cells, but not macrophages, can operate in a CD95L-dependent pathway to generate FcγRII(low/-) activated B cells. Early activation of monocytes in cancer environments is critical for the generation of semimature dendritic cells and subsequent FcγRII(low/-) activated B cells...
November 17, 2016: Nature Communications
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