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https://www.readbyqxmd.com/read/27892410/short-term-no2-exposure-is-associated-with-long-chain-fatty-acids-in-prospective-cohorts-from-augsburg-germany-results-from-an-analysis-of-138-metabolites-and-three-exposures
#1
Cavin K Ward-Caviness, Susanne Breitner, Kathrin Wolf, Josef Cyrys, Gabi Kastenmüller, Rui Wang-Sattler, Alexandra Schneider, Annette Peters
BACKGROUND: Short-term exposure to air pollution is associated with morbidity and mortality. Metabolites are intermediaries in biochemical processes, and associations between air pollution and metabolites can yield unique mechanistic insights. METHODS: We used independent cross-sectional samples with targeted metabolomics (138 metabolites across five metabolite classes) from three cohort studies, each a part of the Cooperative Health Research in the Region of Augsburg (KORA)...
October 2016: International Journal of Epidemiology
https://www.readbyqxmd.com/read/27826058/the-progenitor-cell-dilemma-cellular-and-functional-heterogeneity-in-assistance-or-escalation-of-liver-injury
#2
REVIEW
Veronika Lukacs-Kornek, Frank Lammert
Liver progenitor cells (LPCs) are quiescent cells that are activated during liver injury and thought to give rise to hepatocytes and cholangiocytes in order to support liver regeneration and tissue restitution. While hepatocytes are capable of self-renewal, during most chronic injuries the proliferative capacity of hepatocytes is inhibited thus LPCs provide main source for regeneration. Despite extensive lineage tracing studies, their role and involvement in these processes are often controversial. Additionally, increasing evidence suggest that the LPC compartment consists of heterogeneous cell populations that are actively involved in cellular interactions with myeloid and lymphoid cells during regeneration...
November 5, 2016: Journal of Hepatology
https://www.readbyqxmd.com/read/27796316/ductular-reaction-on-a-chip-microfluidic-co-cultures-to-study-stem-cell-fate-selection-during-liver-injury
#3
Amranul Haque, Pantea Gheibi, Gulnaz Stybayeva, Yandong Gao, Natalie Torok, Alexander Revzin
Liver injury modulates local microenvironment, triggering production of signals that instruct stem cell fate choices. In this study, we employed a microfluidic co-culture system to recreate important interactions in the liver stem cell niche, those between adult hepatocytes and liver progenitor cells (LPCs). We demonstrate that pluripotent stem cell-derived LPCs choose hepatic fate when cultured next to healthy hepatocytes but begin biliary differentiation program when co-cultured with injured hepatocytes. We connect this fate selection to skewing in production of hepatocyte growth factor (HGF) and transforming growth factor (TGF)-β1 caused by injury...
October 31, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27777588/a-transcriptomic-signature-of-mouse-liver-progenitor-cells
#4
Adam M Passman, Jasmine Low, Roslyn London, Janina E E Tirnitz-Parker, Atsushi Miyajima, Minoru Tanaka, Helene Strick-Marchand, Gretchen J Darlington, Megan Finch-Edmondson, Scott Ochsner, Cornelia Zhu, James Whelan, Bernard A Callus, George C T Yeoh
Liver progenitor cells (LPCs) can proliferate extensively, are able to differentiate into hepatocytes and cholangiocytes, and contribute to liver regeneration. The presence of LPCs, however, often accompanies liver disease and hepatocellular carcinoma (HCC), indicating that they may be a cancer stem cell. Understanding LPC biology and establishing a sensitive, rapid, and reliable method to detect their presence in the liver will assist diagnosis and facilitate monitoring of treatment outcomes in patients with liver pathologies...
2016: Stem Cells International
https://www.readbyqxmd.com/read/27768929/metabolite-variations-between-acute-on-chronic-liver-failure-and-chronic-liver-failure-caused-by-hepatitis-b-virus-based-on-ultra-performance-liquid-chromatography-mass-spectrometry
#5
Jiangshan Lian, Xiaofen Li, Yinyin Wang, Jianle Yang, Wei Liu, Jing Ma, Deying Chen, Lanjuan Li, Jianrong Huang
OBJECTIVE: The present study aims to compare serum metabolite alterations between acute-on-chronic liver failure (ACLF) and chronic liver failure (CLF), and find the specific biomarkers associated with the diseases. METHODS: Serum samples were collected from patients with ACLF (n=76) and CLF (n=56) as well as healthy individuals (n=20) and assayed by ultra-performance liquid chromatography mass spectrometry (UPLC-MS). The acquired data was analyzed using principal components analysis (PCA) and partial least squares discriminate analysis (PLS-DA)...
October 18, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27755546/metabolite-and-lipid-profiling-of-biobank-plasma-samples-collected-prior-to-onset-of-rheumatoid-arthritis
#6
Izabella Surowiec, Lisbeth Ärlestig, Solbritt Rantapää-Dahlqvist, Johan Trygg
OBJECTIVE: The early diagnosis of rheumatoid arthritis (RA) is desirable to install treatment to prevent disease progression and joint destruction. Autoantibodies and immunological markers pre-date the onset of symptoms by years albeit not all patients will present these factors, even at disease onset. Additional biomarkers would be of high value to improve early diagnosis and understanding of the process, leading to disease development. METHODS: Plasma samples donated before the onset of RA were identified in the Biobank of Northern Sweden, a collection within national health survey programs...
2016: PloS One
https://www.readbyqxmd.com/read/27736893/detection-of-independent-associations-of-plasma-lipidomic-parameters-with-insulin-sensitivity-indices-using-data-mining-methodology
#7
Steffi Kopprasch, Srirangan Dheban, Kai Schuhmann, Aimin Xu, Klaus-Martin Schulte, Charmaine J Simeonovic, Peter E H Schwarz, Stefan R Bornstein, Andrej Shevchenko, Juergen Graessler
OBJECTIVE: Glucolipotoxicity is a major pathophysiological mechanism in the development of insulin resistance and type 2 diabetes mellitus (T2D). We aimed to detect subtle changes in the circulating lipid profile by shotgun lipidomics analyses and to associate them with four different insulin sensitivity indices. METHODS: The cross-sectional study comprised 90 men with a broad range of insulin sensitivity including normal glucose tolerance (NGT, n = 33), impaired glucose tolerance (IGT, n = 32) and newly detected T2D (n = 25)...
2016: PloS One
https://www.readbyqxmd.com/read/27697477/lysophosphatidylcholines-activate-ppar%C3%AE-and-protect-human-skeletal-muscle-cells-from-lipotoxicity
#8
Christian Klingler, Xinjie Zhao, Till Adhikary, Jia Li, Guowang Xu, Hans-Ulrich Häring, Erwin Schleicher, Rainer Lehmann, Cora Weigert
Metabolomics studies of human plasma demonstrate a correlation of lower plasma lysophosphatidylcholines (LPC) concentrations with insulin resistance, obesity, and inflammation. This relationship is not unraveled on a molecular level. Here we investigated the effects of the abundant LPC(16:0) and LPC(18:1) on human skeletal muscle cells differentiated to myotubes. Transcriptome analysis of human myotubes treated with 10μM LPC for 24h revealed enrichment of up-regulated peroxisome proliferator-activated receptor (PPAR) target transcripts, including ANGPTL4, PDK4, PLIN2, and CPT1A...
September 30, 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27659215/human-lung-spheroids-as-in-vitro-niches-of-lung-progenitor-cells-with-distinctive-paracrine-and-plasticity-properties
#9
Isotta Chimenti, Francesca Pagano, Francesco Angelini, Camilla Siciliano, Giorgio Mangino, Vittorio Picchio, Elena De Falco, Mariangela Peruzzi, Roberto Carnevale, Mohsen Ibrahim, Giuseppe Biondi-Zoccai, Elisa Messina, Giacomo Frati
: : Basic and translational research on lung biology has discovered multiple progenitor cell types, specialized or facultative, responsible for turnover, renewal, and repair. Isolation of populations of resident lung progenitor cells (LPCs) has been described by multiple protocols, and some have been successfully applied to healthy human lung tissue. We aimed at understanding how different cell culture conditions may affect, in vitro, the phenotype of LPCs to create an ideal niche-like microenvironment...
September 22, 2016: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/27597881/atypical-audiovisual-word-processing-in-school-age-children-with-a-history-of-specific-language-impairment-an-event-related-potential-study
#10
Natalya Kaganovich, Jennifer Schumaker, Courtney Rowland
BACKGROUND: Visual speech cues influence different aspects of language acquisition. However, whether developmental language disorders may be associated with atypical processing of visual speech is unknown. In this study, we used behavioral and ERP measures to determine whether children with a history of SLI (H-SLI) differ from their age-matched typically developing (TD) peers in the ability to match auditory words with corresponding silent visual articulations. METHODS: Nineteen 7-13-year-old H-SLI children and 19 age-matched TD children participated in the study...
2016: Journal of Neurodevelopmental Disorders
https://www.readbyqxmd.com/read/27588102/probiotic-pre-administration-reduces-mortality-in-a-mouse-model-of-cecal-ligation-and-puncture-induced-sepsis
#11
Lufang Chen, Keying Xu, Qifeng Gui, Yue Chen, Deying Chen, Yunmei Yang
A number of clinical trials have demonstrated that the use of probiotics has the potential to prevent nosocomial infections. However, the mechanism underlying probiotic-induced anti-infection and sepsis remains to be investigated. In the present study, 200 µl/day of Lactobacillus rhamnosus GG (LGG) or normal saline (control) was orally administrated to 4-week-old C57BL6 mice 4 weeks prior to cecal ligation and puncture (CLP). A number of mice were sacrificed 24 h after CLP, and the remaining mice were used for survival studies...
September 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/27569228/impaired-capacity-of-fibroblasts-to-support-airway-epithelial-progenitors-in-bronchiolitis-obliterans-syndrome
#12
Su-Bei Zhang, Xin Sun, Qi Wu, Jun-Ping Wu, Huai-Yong Chen
BACKGROUND: Bronchiolitis obliterans syndrome (BOS) often develops in transplant patients and results in injury to the respiratory and terminal airway epithelium. Owing to its rising incidence, the pathogenesis of BOS is currently an area of intensive research. Studies have shown that injury to the respiratory epithelium results in dysregulation of epithelial repair. Airway epithelial regeneration is supported by stromal cells, including fibroblasts. This study aimed to investigate whether the supportive role of lung fibroblasts is altered in BOS...
2016: Chinese Medical Journal
https://www.readbyqxmd.com/read/27546717/characterization-of-yeasts-and-filamentous-fungi-using-maldi-lipid-phenotyping
#13
Gerald Stübiger, Michael Wuczkowski, Luis Mancera, Ksenija Lopandic, Katja Sterflinger, Omar Belgacem
Matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) becomes the method of choice for the rapid identification of microorganisms (i.e. protein biotyping). Although bacterial identification is already quite advanced, biotyping of other microbes including yeasts and fungi are still under development. In this context, lipids (e.g. membrane phospholipids) represent a very important group of molecules with essential functions for cell survival and adaptation to specific environments and habitats of the microorganisms...
November 2016: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/27375002/liver-progenitors-isolated-from-adult-healthy-mouse-liver-efficiently-differentiate-to-functional-hepatocytes-in-vitro-and-repopulate-liver-tissue
#14
Naoki Tanimizu, Norihisa Ichinohe, Masayuki Ishii, Junichi Kino, Toru Mizuguchi, Koichi Hirata, Toshihiro Mitaka
It has been proposed that tissue stem cells supply multiple epithelial cells in mature tissues and organs. However, it is unclear whether tissue stem cells generally contribute to cellular turnover in normal healthy organs. Here, we show that liver progenitors distinct from bipotent liver stem/progenitor cells (LPCs) persistently exist in mouse livers and potentially contribute to tissue maintenance. We found that, in addition to LPCs isolated as EpCAM(+) cells, liver progenitors were enriched in CD45(-) TER119(-) CD31(-) EpCAM(-) ICAM-1(+) fraction isolated from late-fetal and postnatal livers...
July 4, 2016: Stem Cells
https://www.readbyqxmd.com/read/27335264/foetal-hepatic-progenitor-cells-assume-a-cholangiocytic-cell-phenotype-during-two-dimensional-pre-culture
#15
Kazuya Anzai, Hiromi Chikada, Kota Tsuruya, Kinuyo Ida, Tatehiro Kagawa, Yutaka Inagaki, Tesuya Mine, Akihide Kamiya
Liver consists of parenchymal hepatocytes and other cells. Liver progenitor cell (LPC) is the origin of both hepatocytes and cholangiocytic cells. The analyses of mechanism regulating differentiation of LPCs into these functional cells are important for liver regenerative therapy using progenitor cells. LPCs in adult livers were found to form cysts with cholangiocytic characteristics in 3D culture. In contrast, foetal LPCs cannot form these cholangiocytic cysts in the same culture. Thus, the transition of foetal LPCs into cholangiocytic progenitor cells might occur during liver development...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27243593/an-antibody-against-triggering-receptor-expressed-on-myeloid-cells-1-trem-1-dampens-proinflammatory-cytokine-secretion-by-lamina-propria-cells-from-patients-with-ibd
#16
Siggeir F Brynjolfsson, Maria K Magnusson, Philip L Kong, Teis Jensen, Joseph L Kuijper, Katarina Håkansson, Christine B Read, Vibeke W Stennicke, Henrik Sjövall, Mary Jo Wick
BACKGROUND: Triggering receptor expressed on myeloid cells 1 (TREM-1) is a potent amplifier of inflammation. Recently, the antimicrobial peptide PGLYRP-1 was shown to be the ligand of TREM-1. Here, the ability of an anti-TREM-1 antibody to dampen the release of proinflammatory cytokines by colon lamina propria cells (LPCs) from patients with IBD was investigated and correlated with PGLYRP-1 levels. METHODS: Biopsies from patients with ulcerative colitis (UC, n = 45) or Crohn's disease (CD, n = 26) were compared with those from individuals undergoing colonoscopy for other reasons (n = 17)...
August 2016: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/27208658/identification-of-a-thalidomide-derivative-that-selectively-targets-tumorigenic-liver-progenitor-cells-and-comparing-its-effects-with-lenalidomide-and-sorafenib
#17
Ken Woo, Scott G Stewart, Geraldine S Kong, Megan L Finch-Edmondson, Benjamin J Dwyer, Sing Y Yeung, Lawrence J Abraham, Sven S Kampmann, Luke A Diepeveen, Adam M Passman, Caryn L Elsegood, Janina E E Tirnitz-Parker, Bernard A Callus, John K Olynyk, George C T Yeoh
BACKGROUND & AIMS: The availability of non-tumorigenic and tumorigenic liver progenitor cell (LPC) lines affords a method to screen putative anti-liver cancer agents to identify those that are selectively effective. To prove this principle we tested thalidomide and a range of its derivatives and compared them to lenalidomide and sorafenib, to assess their growth-inhibitory effects. METHODS: Cell growth, the mitotic and apoptotic index of cell cultures were measured using the Cellavista instrument (SynenTec) using commercially available reagents...
September 14, 2016: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/27188253/progress-in-stem-cell-based-therapy-for-liver-disease
#18
Goshi Shiota, Noriko Itaba
Liver transplantation has been accepted as a useful therapeutic approach for patients with end-stage liver disease. However, the mismatch between the great demand for liver transplants and the number of available donor organs underscores the urgent need for alternative therapeutic strategies for patients with acute and chronic liver failure. The rapidly growing knowledge on stem cell biology has opened new avenues toward stem cell-based therapy for liver disease. Since stem cells have capacity of high proliferation and multipotent differentiation, the characteristics of stem cells fit the cell therapy...
May 18, 2016: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://www.readbyqxmd.com/read/27139191/the-potential-role-of-liver-stem-cells-in-initiation-of-primary-liver-cancer
#19
Xiao-Song Zhi, Jun Xiong, Xiao-Yuan Zi, Yi-Ping Hu
Identification of the cellular origin of primary liver cancer remains challenging. Some data point toward liver stem cells (LSCs) or liver progenitor cells (LPCs) not only as propagators of liver regeneration, but also as initiators of liver cancer. LSCs exhibit a long lifespan and strong duplicative potential upon activation and are inclined to accumulate more mutations that can be passed down to the next generations. Recent evidence shows that dysregulation of signaling pathways associated with self-renewal of LSCs can drive their aberrant proliferation and even malignant transformation...
May 2, 2016: Hepatology International
https://www.readbyqxmd.com/read/27020634/efficient-generation-of-functional-hepatocyte-like-cells-from-mouse-liver-progenitor-cells-via-indirect-co-culture-with-immortalized-human-hepatic-stellate-cells
#20
Xiao-Ping Pan, Yi-Ni Wang, Xiao-Peng Yu, Chun-Xia Zhu, Jian-Zhou Li, Wei-Bo Du, Yi-Min Zhang, Hong-Cui Cao, Yan-Hong Zhang, Dan-Hua Zhu, George C Yeoh, Lan-Juan Li
BACKGROUND: Differentiation of liver progenitor cells (LPCs) to functional hepatocytes holds great potential to develop new strategies for hepatocyte transplantation and the screening of drug-induced cytotoxicity. However, reports on the efficient and convenient hepatic differentiation of LPCs to hepatocytes are few. The present study aims to investigate the possibility of generating functional hepatocytes from LPCs in an indirect co-culture system. METHODS: Mouse LPCs were co-cultured in Transwell plates with an immortalized human hepatic stellate cell line (HSC-Li) we previously established...
April 2016: Hepatobiliary & Pancreatic Diseases International: HBPD INT
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