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https://www.readbyqxmd.com/read/28504685/spleen-derived-lipocalin-2-in-the-portal-vein-regulates-kupffer-cells-activation-and-attenuates-the-development-of-liver-fibrosis-in-mice
#1
Tomonori Aoyama, Kyoko Kuwahara-Arai, Akira Uchiyama, Kazuyoshi Kon, Hironao Okubo, Shunhei Yamashina, Kenichi Ikejima, Shigehiro Kokubu, Akihisa Miyazaki, Sumio Watanabe
The liver has an immune tolerance against gut-derived products from the portal vein (PV). A disruption of the gut-liver axis leads to liver injury and fibrosis. The spleen is connected to the PV and regulates immune functions. However, possible splenic effects on liver fibrosis development are unclear. Lipocalin-2 (Lcn2) is an antimicrobial protein that regulates macrophage activation. To clarify the role of the spleen in liver fibrosis development, we induced liver fibrosis in mice after splenectomy, and investigated liver fibrosis development...
May 15, 2017: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/28485407/lipocalin-2-regulates-adult-neurogenesis-and-contextual-discriminative-behaviours
#2
A C Ferreira, T Santos, B Sampaio-Marques, A Novais, S D Mesquita, P Ludovico, L Bernardino, M Correia-Neves, N Sousa, J A Palha, J C Sousa, F Marques
In the adult mammalian brain, newborn granule cells are continuously integrated into hippocampal circuits, and the fine-tuning of this process is important for hippocampal function. Thus, the identification of factors that control adult neural stem cells (NSCs) maintenance, differentiation and integration is essential. Here we show that the deletion of the iron trafficking protein lipocalin-2 (LCN2) induces deficits in NSCs proliferation and commitment, with impact on the hippocampal-dependent contextual fear discriminative task...
May 9, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28467300/tcf7l1-promotes-skin-tumorigenesis-independently-of-%C3%AE-catenin-through-induction-of-lcn2
#3
Amy T Ku, Timothy M Shaver, Ajay S Rao, Jeffrey M Howard, Christine N Rodriguez, Qi Miao, Gloria Garcia, Diep Le, Diane Yang, Malgorzata Borowiak, Daniel N Cohen, Vida Chitsazzadeh, Abdul H Diwan, Kenneth Y Tsai, Hoang Nguyen
The transcription factor TCF7L1 is an embryonic stem cell signature gene that is upregulated in multiple aggressive cancer types, but its role in skin tumorigenesis has not yet been defined. Here we document TCF7L1 upregulation in skin squamous cell carcinoma (SCC) and demonstrate that TCF7L1 overexpression increases tumor incidence, tumor multiplicity, and malignant progression in the chemically induced mouse model of skin SCC. Additionally, we show that downregulation of TCF7L1 and its paralogue TCF7L2 reduces tumor growth in a xenograft model of human skin SCC...
May 3, 2017: ELife
https://www.readbyqxmd.com/read/28445245/ectopic-expression-of-innate-immune-protein-lipocalin-2-in-lactococcus-lactis-protects-against-gut-and-environmental-stressors
#4
Piu Saha, Benoit Chassaing, Beng San Yeoh, Emilie Viennois, Xia Xiao, Mary J Kennett, Vishal Singh, Matam Vijay-Kumar
BACKGROUND: Lipocalin-2 (Lcn2) is a multifunctional innate immune protein that exhibits antimicrobial activity by the sequestration of bacterial siderophores, regulates iron homeostasis, and augments cellular tolerance to oxidative stress. Studies in the murine model of colitis have demonstrated that Lcn2 deficiency exacerbates colitogenesis; however, the therapeutic potential of Lcn2 supplementation has yet to be elucidated. In light of its potential mucoprotective functions, we, herein, investigated whether expression of Lcn2 in the probiotic bacterium can be exploited to alleviate experimental colitis...
April 25, 2017: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/28432145/bacterial-siderophores-hijack-neutrophil-functions
#5
Piu Saha, Beng San Yeoh, Rodrigo A Olvera, Xia Xiao, Vishal Singh, Deepika Awasthi, Bhagawat C Subramanian, Qiuyan Chen, Madhu Dikshit, Yanming Wang, Carole A Parent, Matam Vijay-Kumar
Neutrophils are the primary immune cells that respond to inflammation and combat microbial transgression. To thrive, the bacteria residing in their mammalian host have to withstand the antibactericidal responses of neutrophils. We report that enterobactin (Ent), a catecholate siderophore expressed by Escherichia coli, inhibited PMA-induced generation of reactive oxygen species (ROS) and neutrophil extracellular traps (NETs) in mouse and human neutrophils. Ent also impaired the degranulation of primary granules and inhibited phagocytosis and bactericidal activity of neutrophils, without affecting their migration and chemotaxis...
April 21, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28410227/subcloning-and-characterization-of-highly-metastatic-cells-derived-from-human-esophageal-squamous-cell-carcinoma-kyse150-cells-by-in-vivo-selection
#6
Masafumi Okuda, Jun Inoue, Naoto Fujiwara, Tatsuyuki Kawano, Johji Inazawa
Esophageal cancer is the eighth most common cancer and the sixth most common cause of cancer-related deaths worldwide. Despite the research progress in understanding the disease, the mechanism underlying the metastasis is still unclear. Here, we successfully generated a highly metastatic cell subline, designated as KYSE150-LuM, derived from an esophageal squamous cell carcinoma cell line (KYSE150) by in vivo selection. To elucidate the mechanisms driving metastasis, we characterized the gene expression differences between LuM cells and parent KYSE150 cells...
March 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28396286/altered-mitochondrial-and-peroxisomal-integrity-in-lipocalin-2-deficient-mice-with-hepatic-steatosis
#7
Anastasia Asimakopoulou, Annabelle Fülöp, Erawan Borkham-Kamphorst, Eddy Van de Leur, Nikolaus Gassler, Thorsten Berger, Birte Beine, Helmut E Meyer, Tak W Mak, Carsten Hopf, Corinna Henkel, Ralf Weiskirchen
Lipocalin-2 (LCN2) is a secreted adipokine that transports small hydrophobic molecules such as fatty acids and steroids. LCN2 limits bacterial growth by sequestering iron-containing siderophores and in mammalian liver protects against inflammation, infection, injury and other stressors. Because LCN2 modulates hepatic fat metabolism and homeostasis, we performed a comparative profiling of proteins and lipids of wild type (WT) and Lcn2-deficient mice fed either standard chow or a methionine- and choline-deficient (MCD) diet...
April 7, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28385522/transcriptome-analysis-of-the-effects-of-chitosan-on-the-hyperlipidemia-and-oxidative-stress-in-high-fat-diet-fed-mice
#8
Bin Wang, Sicong Zhang, Xiaoya Wang, Shuo Yang, Qixing Jiang, Yanshun Xu, Wenshui Xia
Transcriptome analysis was performed to investigate the alterations in gene expression after chitosan (CS) treatment on the liver of mice fed with high-fat diet (HFD). The results showed that the body weight, the liver weight and the epididymal fat mass of HFD mice, which were 62.98%, 46.51% and 239.37%, respectively, higher than those of control mice, could be significantly decreased by chitosan supplementation. Also, high-fat diet increased both plasma lipid and liver lipid as compared with the control mice...
April 3, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28340561/ascorbic-acid-ameliorates-renal-injury-in-a-murine-model-of-contrast-induced-nephropathy
#9
K Rollins, A Noorani, L Janeckova, T Jones, M Griffiths, M P Baker, J R Boyle
BACKGROUND: Contrast induced nephropathy (CIN) is the commonest cause of iatrogenic renal injury and its incidence has increased with the advent of complex endovascular procedures. Evidence suggests that ascorbic acid (AA) has a nephroprotective effect in percutaneous coronary interventions when contrast media are used. A variety of biomarkers (NGAL, NGAL:creatinine, mononuclear cell infiltration, apoptosis and RBP-4) in both the urine and kidney were assayed using a mouse model of CIN in order to determine whether AA can reduce the incidence and/or severity of renal injury...
March 24, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28273060/mc4r-dependent-suppression-of-appetite-by-bone-derived-lipocalin-2
#10
Ioanna Mosialou, Steven Shikhel, Jian-Min Liu, Antonio Maurizi, Na Luo, Zhenyan He, Yiru Huang, Haihong Zong, Richard A Friedman, Jonathan Barasch, Patricia Lanzano, Liyong Deng, Rudolph L Leibel, Mishaela Rubin, Thomas Nicholas, Wendy Chung, Lori M Zeltser, Kevin W Williams, Jeffrey E Pessin, Stavroula Kousteni
Bone has recently emerged as a pleiotropic endocrine organ that secretes at least two hormones, FGF23 and osteocalcin, which regulate kidney function and glucose homeostasis, respectively. These findings have raised the question of whether other bone-derived hormones exist and what their potential functions are. Here we identify, through molecular and genetic analyses in mice, lipocalin 2 (LCN2) as an osteoblast-enriched, secreted protein. Loss- and gain-of-function experiments in mice demonstrate that osteoblast-derived LCN2 maintains glucose homeostasis by inducing insulin secretion and improves glucose tolerance and insulin sensitivity...
March 16, 2017: Nature
https://www.readbyqxmd.com/read/28256718/lipocalin-2-is-expressed-by-activated-granulocytes-and-keratinocytes-in-affected-skin-and-reflects-disease-activity-in-acne-inversa-hidradenitis-suppurativa
#11
K Wolk, J Wenzel, A Tsaousi, E Witte-Händel, N Babel, C Zelenak, H-D Volk, W Sterry, S Schneider-Burrus, R Sabat
BACKGROUND: Acne inversa (AI)/Hidradenitis suppurativa is a chronic inflammatory disease characterized by painful axillary, inguinal, and perianal skin lesions with deep-seated nodules, abscesses, and fistulae. OBJECTIVES: This study aimed at the identification and characterization of key players in AI pathogenesis. METHODS: Epidemiologic and anamnestic data as well as blood and skin samples of AI patients were collected. Healthy participants and psoriasis patients served as controls...
March 3, 2017: British Journal of Dermatology
https://www.readbyqxmd.com/read/28255266/lipocalin-2-promotes-endoplasmic-reticulum-stress-and-proliferation-by-augmenting-intracellular-iron-in-human-pulmonary-arterial-smooth-muscle-cells
#12
Guoliang Wang, Shenghua Liu, Li Wang, Liukun Meng, Chuanjue Cui, Hao Zhang, Shengshou Hu, Ning Ma, Yingjie Wei
Endoplasmic reticulum (ER) stress, a feature of many conditions associated with pulmonary hypertension (PH), is increasingly recognized as a common response to promote proliferation in the walls of pulmonary arteries. Increased expression of Lipocalin-2 in PH led us to test the hypothesis that Lipocalin-2, a protein known to sequester iron and regulate it intracellularly, might facilitate the ER stress and proliferation in pulmonary arterial smooth muscle cells (PASMCs). In this study, we observed greatly increased Lcn2 expression accompanied with increased ATF6 cleavage in a standard rat model of pulmonary hypertension induced by monocrotaline...
2017: International Journal of Biological Sciences
https://www.readbyqxmd.com/read/28249896/lipocalin-2-promotes-pancreatic-ductal-adenocarcinoma-by-regulating-inflammation-in-the-tumor-microenvironment
#13
Sobeyda Gomez-Chou, Agnieszka Swidnicka-Siergiejko, Niharika Badi, Myrriah Chavez-Tomar, Gregory B Lesinski, Tanios Bekaii-Saab, Matthew R Farren, Thomas A Mace, Carl Schmidt, Yan Liu, Defeng Deng, Rosa F Hwang, Liran Zhou, Todd T Moore, Deyali Chatterjee, Huamin Wang, Xiaohong Leng, Ralph B Arlinghaus, Craig D Logsdon, Zobeida Cruz-Monserrate
Lipocalin-2 (LCN2) promotes malignant development in many cancer types. LCN2 is upregulated in patients with pancreatic ductal adenocarcinoma (PDAC) and in obese individuals, but whether it contributes to PDAC development is unclear. In this study, we investigated the effects of Lcn2 depletion on diet-induced obesity, inflammation and PDAC development. Mice with acinar cell-specific expression of KrasG12D were crossed with Lcn2-depleted animals and fed isocaloric diets with varying amounts of fat content. Pancreas were collected and analyzed for inflammation, pancreatic intraepithelial neoplasia (PanIN) and PDAC...
March 1, 2017: Cancer Research
https://www.readbyqxmd.com/read/28229276/effects-of-chlorella-vulgaris-on-tumor-growth-in-mammary-tumor-bearing-balb-c-mice-discussing-association-of-an-immune-suppressed-protumor-microenvironment-with-serum-ifn%C3%AE-and-igg-decrease-and-spleen-igg-potentiation
#14
Ahad Khalilnezhad, Elham Mahmoudian, Nariman Mosaffa, Ali Anissian, Mohsen Rashidi, Davar Amani
PURPOSE: Chlorella vulgaris (CV) has exhibited immune-enhancing and protective activities against cancer and infections. However, there is an increasing concern about the use of Chlorella species in human, regarding its various molecules with antigenic features found in infectious microorganisms. Our goal was to investigate the impact of higher concentrations of CV on tumor growth in spontaneous mouse mammary tumor (SMMT) models. METHODS: Balb/c mice were daily given CV powder at doses of 0, 200, or 300 mg/kg for 42 days (CONTROL, CV200, and CV300 groups, respectively; n = 6/group)...
February 22, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/28214071/lipocalin-2-a-master-mediator-of-intestinal-and-metabolic-inflammation
#15
REVIEW
Alexander R Moschen, Timon E Adolph, Romana R Gerner, Verena Wieser, Herbert Tilg
Lipocalin-2 (LCN2), also known as neutrophil gelatinase-associated lipocalin (NGAL), is released by various cell types and is an attractive biomarker of inflammation, ischemia, infection, and kidney damage. Both intestinal and metabolic inflammation, as observed in obesity and related disorders, are associated with increased LCN2 synthesis. While LCN2 in the intestinal tract regulates the composition of the gut microbiota and shows anti-inflammatory activities, it also exhibits proinflammatory activities in other experimental settings...
February 14, 2017: Trends in Endocrinology and Metabolism: TEM
https://www.readbyqxmd.com/read/28185846/corticoids-synergize-with-il-1-in-the-induction-of-lcn2
#16
J Conde, V Lazzaro, M Scotece, V Abella, R Villar, V López, M Á Gonzalez-Gay, J Pino, R Gómez, A Mera, O Gualillo
OBJECTIVE: Lipocalin-2 (LCN2) is an adipokine that was first identified in neutrophil granules. In the last years it was recognized as a factor that could impair chondrocyte phenotype, cartilage homeostasis as well as growth plate development. Both pro-inflammatory cytokines and glucocorticoids (GCs) modulate LCN2 expression. Actually, GCs were found to be LCN2 inducers, suggesting that part of the negative actions exerted by these anti-inflammatory drugs at cartilage level could be mediated by this adipokine...
February 6, 2017: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/28177777/high-concentration-calcitriol-induces-endoplasmic-reticulum-stress-related-gene-profile-in-breast-cancer-cells
#17
Ali Burak Ozkaya, Handan Ak, Hikmet Hakan Aydin
Calcitriol, the active form of vitamin D, is known for its anticancer properties including induction of apoptosis as well as the inhibition of angiogenesis and metastasis. Understanding the mechanisms of action for calcitriol will help with the development of novel treatment strategies. Since vitamin D exerts its cellular actions via binding to its receptor and by altering expressions of a set of genes, we aimed to evaluate the effect of calcitriol on transcriptomic profile of breast cancer cells. We previously demonstrated that calcitriol alters endoplasmic reticulum (ER) stress markers, therefore in this study we have focused on ER-stress-related genes to reveal calcitriols action on these genes in particular...
April 2017: Biochemistry and Cell Biology, Biochimie et Biologie Cellulaire
https://www.readbyqxmd.com/read/28176019/long-term-treatment-with-egfr-inhibitor-erlotinib-attenuates-renal-inflammatory-cytokines-but-not-nephropathy-in-alport-syndrome-mouse-model
#18
Kohei Omachi, Rui Miyakita, Ryosuke Fukuda, Yukari Kai, Mary Ann Suico, Tsubasa Yokota, Misato Kamura, Tsuyoshi Shuto, Hirofumi Kai
BACKGROUND: Alport syndrome (AS) is a hereditary kidney disease caused by mutation of type IV collagen. Loss of collagen network induces collapse of glomerular basement membrane (GBM) structure. The previous studies showed that upregulation of some tyrosine kinase receptors signaling accompanied GBM disorder in AS mouse model. EGFR signaling is one of the well-known receptor kinase signaling that is involved in glomerular diseases. However, whether EGFR signaling is relevant to AS progression is still uninvestigated...
February 8, 2017: Clinical and Experimental Nephrology
https://www.readbyqxmd.com/read/28161472/novel-serum-and-bile-protein-markers-predict-primary-sclerosing-cholangitis-disease-severity-and-prognosis
#19
Mette Vesterhus, Anders Holm, Johannes Roksund Hov, Ståle Nygård, Erik Schrumpf, Espen Melum, Liv Wenche Thorbjørnsen, Vemund Paulsen, Knut Lundin, Inge Dale, Odd Helge Gilja, Serge J L B Zweers, Morten Vatn, Frank G Schaap, Peter L M Jansen, Thor Ueland, Helge Røsjø, Bjørn Moum, Cyriel Y Ponsioen, Kirsten Muri Boberg, Martti Färkkilä, Tom H Karlsen, Fridtjof Lund-Johansen
BACKGROUND & AIMS: Prognostic biomarkers are lacking in primary sclerosing cholangitis, hampering patient care and the development of therapy. We aimed to identify novel protein biomarkers of disease severity and prognosis in primary sclerosing cholangitis (PSC). METHODS: Using a bead-based array targeting 63 proteins, we profiled a derivation panel of Norwegian endoscopic retrograde cholangiography bile samples (55 PSC, 20 disease controls) and a Finnish validation panel (34 PSC, 10 disease controls)...
June 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/28122643/identification-of-potential-saliva-and-tear-biomarkers-in-primary-sj%C3%A3-gren-s-syndrome-utilising-the-extraction-of-extracellular-vesicles-and-proteomics-analysis
#20
Lara A Aqrawi, Hilde Kanli Galtung, Beate Vestad, Reidun Øvstebø, Bernd Thiede, Shermin Rusthen, Alix Young, Eduarda M Guerreiro, Tor Paaske Utheim, Xiangjun Chen, Øygunn Aass Utheim, Øyvind Palm, Janicke Liaaen Jensen
BACKGROUND: There is a long-lasting need for non-invasive, more accurate diagnostic techniques when evaluating primary Sjögren's syndrome (pSS) patients. Incorporation of additional diagnostics involving screening for disease-specific biomarkers in biological fluid is a promising concept that requires further investigation. In the current study we aimed to explore novel disease biomarkers in saliva and tears from pSS patients. METHODS: Liquid chromatography-mass spectrometry (LC-MS) was performed on stimulated whole saliva and tears from 27 pSS patients and 32 healthy controls, and salivary and tear proteomic biomarker profiles were generated...
January 25, 2017: Arthritis Research & Therapy
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