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Hypoxia and liver disease

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https://www.readbyqxmd.com/read/29922597/recent-advances-in-replication-and-infection-of-human-parvovirus-b19
#1
REVIEW
Safder S Ganaie, Jianming Qiu
Parvovirus B19 (B19V) is pathogenic to humans and causes bone marrow failure diseases and various other inflammatory disorders. B19V infection exhibits high tropism for human erythroid progenitor cells (EPCs) in the bone marrow and fetal liver. The exclusive restriction of B19V replication to erythroid lineage cells is partly due to the expression of receptor and co-receptor(s) on the cell surface of human EPCs and partly depends on the intracellular factors essential for virus replication. We first summarize the latest developments in the viral entry process and the host cellular factors or pathways critical for B19V replication...
2018: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29915639/a-case-of-concomitant-obstructive-sleep-apnea-and-non-alcoholic-steatohepatitis-treated-with-cpap-therapy
#2
Bharat Bajantri, Dmitry Lvovsky
Obstructive sleep apnea syndrome is a disorder of sleep breathing that is a result of recurrent and intermittent hypoxia during sleep induced by the repeated partial or complete collapse of the upper airway, eventually causing chronic intermittent hypoxia. Non-alcoholic fatty liver disease is divided into non-alcoholic fatty liver and non-alcoholic steatohepatitis. Animal and human studies showed that obesity is associated with chronic liver hypoxia, even in the presence of systemic normoxia causing inflammation and release of cytokines...
June 2018: Gastroenterology Research
https://www.readbyqxmd.com/read/29850271/an-unusual-case-of-refractory-hypoxia-on-the-icu
#3
Caroline Phillips, Clare Harris, Nathaniel Broughton, Thomas Pulimood, Liam Ring
We present the case of a 68-year-old gentleman who presented with breathlessness and was found to have NSTEMI, pulmonary oedema, and hypoxia. He remained hypoxic despite appropriate treatment and was found to have preserved LV function and raised cardiac output. CT pulmonary angiogram was negative but a cirrhotic liver was incidentally noted and later confirmed via ultrasound. Bedside examination was positive for orthodeoxia, suggesting a diagnosis of hepatopulmonary syndrome (HPS). The finding of significant intrapulmonary shunting on "bubble" echocardiography confirmed the diagnosis...
2018: Case Reports in Critical Care
https://www.readbyqxmd.com/read/29849880/preventive-and-therapeutic-role-of-functional-ingredients-of-barley-grass-for-chronic-diseases-in-human-beings
#4
REVIEW
Yawen Zeng, Xiaoying Pu, Jiazhen Yang, Juan Du, Xiaomeng Yang, Xia Li, Ling Li, Yan Zhou, Tao Yang
Barley grass powder is the best functional food that provides nutrition and eliminates toxins from cells in human beings; however, its functional ingredients have played an important role as health benefit. In order to better cognize the preventive and therapeutic role of barley grass for chronic diseases, we carried out the systematic strategies for functional ingredients of barley grass, based on the comprehensive databases, especially the PubMed, Baidu, ISI Web of Science, and CNKI, between 2008 and 2017...
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29803899/intestinal-hif-1%C3%AE-deletion-exacerbates-alcoholic-liver-disease-through-inducing-intestinal-dysbiosis-and-barrier-dysfunction
#5
Tuo Shao, Cuiqing Zhao, Fengyuan Li, Zelin Gu, Limimg Liu, Lihua Zhang, Yuhua Wang, Liqing He, Yunhuan Liu, Qi Liu, Yiping Chen, Hridgandh Donde, Rui Wang, Venkatakrishna R Jala, Shirish Barve, Shao-Yu Chen, Xiang Zhang, Yongping Chen, Craig J McClain, Wenke Feng
OBJECTIVES: Alcoholic liver disease (ALD) is characterized by gut dysbiosis and increased gut permeability. Hypoxia Induced Factor 1α (HIF-1α) has been implicated in transcriptional regulation of intestinal barrier integrity and inflammation. We aimed to test the hypothesis that HIF-1α plays a critical role in gut microbiota homeostasis and the maintenance of intestinal barrier integrity in a mouse model of ALD. METHODS: Wide type (WT) and intestinal epithelial-specific HIF-1α knockout mice (IEhif-1α-/- ) were pair-fed modified Lieber-DeCarli liquid diet containing 5% (w/v) alcohol or isocaloric maltose dextrin for 24 days...
May 24, 2018: Journal of Hepatology
https://www.readbyqxmd.com/read/29780898/sumoylation-and-phosphorylation-cross-talk-in-hepatocellular-carcinoma
#6
REVIEW
Maria Lauda Tomasi, Komal Ramani
Hepatocellular carcinoma (HCC) is a primary malignancy of the liver and occurs predominantly in patients with underlying chronic liver disease and cirrhosis. The large spectrum of protein post-translational modification (PTM) includes numerous critical signaling events that occur during neoplastic transformation. PTMs occur to nearly all proteins and increase the functional diversity of proteins. We have reviewed the role of two major PTMs, SUMOylation and phosphorylation, in the altered signaling of key players in HCC...
2018: Translational Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/29778908/mammalian-target-of-rapamycin-complex-2-signaling-in-obese-women-changes-after-bariatric-surgery
#7
Marcela Augusta de Souza Pinhel, Carolina Ferreira Nicoletti, Natalia Yumi Noronha, Bruno Affonso Parenti de Oliveira, Cristiana Cortes-Oliveira, Wilson Salgado, Wilson Araujo da Silva, Doroteia Rossi Silva Souza, Julio Sergio Marchini, Carla Barbosa Nonino
OBJECTIVES: After bariatric surgery, modifications to signaling pathway networks including those of the metabolic regulator called mammalian or mechanistic target of rapamycin (mTOR) may lead to molecular alterations related to energy source availability, systemic nutrients, and catabolic and anabolic cellular processes. This study aimed to identify gene expression changes with regard to the mTOR complex 2 subunit signaling pathway in obese patients before and after bariatric surgery...
March 21, 2018: Nutrition
https://www.readbyqxmd.com/read/29770483/melatonin-modulates-dysregulated-circadian-clocks-in-mice-with-diethylnitrosamine-induced-hepatocellular-carcinoma
#8
Diana I Sánchez, Bárbara González-Fernández, Irene Crespo, Beatriz San-Miguel, Marcelino Álvarez, Javier González-Gallego, María Jesús Tuñón
Disruption of circadian rhythms, which are regulated by the circadian clock machinery, plays an important role in different long-term diseases including hepatocellular carcinoma (HCC). Melatonin has been reported to alleviate promotion and progression of HCC, but the potential contribution of circadian clock modulation is unknown. We investigated the effects of melatonin in mice which received diethylnitrosamine (DEN) (35 mg/kg body weight i.p.) once a week for 8 weeks. Melatonin was given at 5 or 10 mg/kg/day i...
May 16, 2018: Journal of Pineal Research
https://www.readbyqxmd.com/read/29769640/hypoxia-induced-microrna-191-contributes-to-hepatic-ischemia-reperfusion-injury-through-the-zonab-cyclin-d1-axis
#9
Wenming Pan, Lin Wang, Xiao-Fei Zhang, Hongji Zhang, Jinxiang Zhang, Guoliang Wang, Peng Xu, Yunwei Zhang, Ping Hu, Xiao-Dong Zhang, Run-Lei Du, Hui Wang
Hepatic ischemia/reperfusion injury (IRI) is a common cause of morbidity and mortality in liver transplantation settings and involves severe cell death and inflammatory responses. MicroRNA-191 has recently been reported to be abnormally expressed in hepatocellular carcinoma and other liver diseases in the regulation of important cellular processes. However, little is known about its function and molecular mechanism in IRI. Here, we demonstrate that miR-191 is significantly upregulated in a cultured cell line during hypoxia/reperfusion (H/R) and in liver tissue during IRI in mice...
May 16, 2018: Cell Death and Differentiation
https://www.readbyqxmd.com/read/29763928/identification-and-verification-of-candidate-genes-regulating-neural-stem-cells-behavior-under-hypoxia
#10
Zhongju Shi, Zhijian Wei, Jiahe Li, Shiyang Yuan, Bin Pan, Fujiang Cao, Hengxing Zhou, Yan Zhang, Yao Wang, Shiwei Sun, Xiaohong Kong, Shiqing Feng
BACKGROUND/AIMS: Neural stem cells (NSCs) reside in a hypoxic environment, and hypoxia plays an important role in their development and differentiation. This study aimed to explore the underlying mechanisms by which hypoxia affects NSC behavior. METHODS: In the current study, we downloaded the gene expression dataset GSE68572 and identified the differentially expressed genes (DEGs) by analyzing high-throughput gene expression in hypoxic and normoxic NSCs. Subsequently, we analyzed these data using a combined bioinformatics approach and predicted the microRNAs (miRNAs) targeting the key gene using miRNA databases...
May 10, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29752170/treating-obstructive-sleep-apnea-and-chronic-intermittent-hypoxia-improves-the-severity-of-nonalcoholic-fatty-liver-disease-in-children
#11
Shikha S Sundaram, Ann C Halbower, Jelena Klawitter, Zhaoxing Pan, Kristen Robbins, Kelley E Capocelli, Ronald J Sokol
OBJECTIVE: To determine the effects of treating obstructive sleep apnea/nocturnal hypoxia on pediatric nonalcoholic fatty liver disease (NAFLD) severity and oxidative stress. STUDY DESIGN: Biopsy proven participants (n = 9) with NAFLD and obstructive sleep apnea/hypoxia were studied before and after treatment with continuous positive airway pressure (CPAP) for sleep disordered breathing, including laboratory testing and markers of oxidative stress, urine F(2)-isoprostanes...
May 8, 2018: Journal of Pediatrics
https://www.readbyqxmd.com/read/29748743/erythropoietin-and-nrf2-key-factors-in-the-neuroprotection-provided-by-apo-lactoferrin
#12
E T Zakharova, A V Sokolov, N N Pavlichenko, V A Kostevich, I N Abdurasulova, A V Chechushkov, I V Voynova, A Yu Elizarova, N N Kolmakov, M G Bass, I V Semak, A I Budevich, P M Kozhin, N K Zenkov, V M Klimenko, O V Kirik, D E Korzhevskii, E B Menshchikova, V B Vasilyev
Among the properties of lactoferrin (LF) are bactericidal, antianemic, immunomodulatory, antitumour, antiphlogistic effects. Previously we demonstrated its capacity to stabilize in vivo HIF-1-alpha and HIF-2-alpha, which are redox-sensitive multiaimed transcription factors. Various tissues of animals receiving recombinant human LF (rhLF) responded by expressing the HIF-1-alpha target genes, hence such proteins as erythropoietin (EPO), ceruloplasmin, etc. were synthesized in noticeable amounts. Among organs in which EPO synthesis occurred were brain, heart, spleen, liver, kidneys and lungs...
May 10, 2018: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
https://www.readbyqxmd.com/read/29738538/the-hypoxia-inducible-factor-erythropoietin-epo-epo-receptor-pathway-is-disturbed-in-a-rat-model-of-chronic-kidney-disease-related-anemia
#13
Daniel Landau, Lital London, Inbar Bandach, Yael Segev
OBJECTIVES: Anemia is a known driver for hypoxia inducible factor (HIF) which leads to increased renal erythropoietin (EPO) synthesis. Bone marrow (BM) EPO receptor (EPOR) signals are transduced through a JAK2-STAT5 pathway. The origins of anemia of chronic kidney disease (CKD) are multifactorial, including impairment of both renal EPO synthesis as well as intestinal iron absorption. We investigated the HIF- EPO- EPOR axis in kidney, BM and proximal tibia in anemic juvenile CKD rats. METHODS: CKD was induced by 5/6 nephrectomy in young (20 days old) male Sprague-Dawley rats while C group was sham operated...
2018: PloS One
https://www.readbyqxmd.com/read/29709678/lysyl-oxidase-like-protein-2-loxl2-modulates-barrier-function-in-cholangiocytes-in-cholestasis
#14
Marion J Pollheimer, Silvia Racedo, Amanda Mikels-Vigdal, Derek Marshall, Christopher Bowlus, Carolin Lackner, Tobias Madl, Tom H Karlsen, Johannes R Hov, Susan K Lyman, Joanne Adamkewicz, Victoria Smith, Emmanuel Moreau, Gernot Zollner, Tor Jacob Eide, Tatjana Stojakovic, Hubert Scharnagl, Hans-Jürgen Gruber, Rudolf E Stauber, Michael Trauner, Peter Fickert
BACKGROUND & AIMS: The lysyl oxidase-like protein 2 (LOXL2) promotes stabilization of the extracellular matrix, chemotaxis, cell growth and cell mobility. We aimed to (i) identify stimuli of LOXL2 in cholangiopathies, (ii) characterize the effects of LOXL2 on biliary epithelial cells' (BECs) barrier function, (iii) compare LOXL2 expression in primary sclerosing cholangitis (PSC), primary biliary cholangitis, and disease controls, and (iv) to determine LOXL2 expression and its cellular sources in four mouse models of cholangiopathies...
April 28, 2018: Journal of Hepatology
https://www.readbyqxmd.com/read/29694434/haptoglobin-and-hemopexin-inhibit-vaso-occlusion-and-inflammation-in-murine-sickle-cell-disease-role-of-heme-oxygenase-1-induction
#15
John D Belcher, Chunsheng Chen, Julia Nguyen, Fuad Abdulla, Ping Zhang, Hao Nguyen, Phong Nguyen, Trevor Killeen, Sylvia M Miescher, Nathan Brinkman, Karl A Nath, Clifford J Steer, Gregory M Vercellotti
During hemolysis, hemoglobin and heme released from red blood cells promote oxidative stress, inflammation and thrombosis. Plasma haptoglobin and hemopexin scavenge free hemoglobin and heme, respectively, but can be depleted in hemolytic states. Haptoglobin and hemopexin supplementation protect tissues, including the vasculature, liver and kidneys. It is widely assumed that these protective effects are due primarily to hemoglobin and heme clearance from the vasculature. However, this simple assumption does not account for the consequent cytoprotective adaptation seen in cells and organs...
2018: PloS One
https://www.readbyqxmd.com/read/29693586/ellagic-acid-alleviates-hepatic-oxidative-stress-and-insulin-resistance-in-diabetic-female-rats
#16
Simran Alexandria Polce, Cameron Burke, Lucas Martins França, Benjamin Kramer, Antonio Marcus de Andrade Paes, Maria Alicia Carrillo-Sepulveda
Non-alcoholic fatty liver disease (NAFLD) affects more than 70% of patients with type 2 diabetes mellitus (T2DM) and has become one of the most common metabolic liver diseases worldwide. To date, treatments specifically targeting NAFLD do not exist. Oxidative stress and insulin resistance have been implicated in the pathogenesis of NAFLD in diabetes. Accordingly, the goal of this present study was to determine whether Ellagic acid (EA), a natural antioxidant polyphenol found in berries and nuts, mitigates hepatic oxidative stress and insulin resistance in T2DM rats, and thus alleviates NAFLD...
April 25, 2018: Nutrients
https://www.readbyqxmd.com/read/29664738/pharmacological-induction-of-hypoxia-inducible-transcription-factor-arnt-attenuates-chronic-kidney-failure
#17
Björn Tampe, Désirée Tampe, Gunsmaa Nyamsuren, Friederike Klöpper, Gregor Rapp, Anne Kauffels, Thomas Lorf, Elisabeth M Zeisberg, Gerhard A Müller, Raghu Kalluri, Samy Hakroush, Michael Zeisberg
Progression of chronic kidney disease associated with progressive fibrosis and impaired tubular epithelial regeneration is still an unmet biomedical challenge because, once chronic lesions have manifested, no effective therapies are available as of yet for clinical use. Prompted by various studies across multiple organs demonstrating that preconditioning regimens to induce endogenous regenerative mechanisms protect various organs from later incurring acute injuries, we here aimed to gain insights into the molecular mechanisms underlying successful protection and to explore whether such pathways could be utilized to inhibit progression of chronic organ injury...
June 11, 2018: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29609450/hepatopulmonary-syndrome-caused-by-hypothalamic-obesity-and-nonalcoholic-fatty-liver-disease-after-surgery-for-craniopharyngioma-a-case-report
#18
Dai Jung, Go Hun Seo, Yoon-Myung Kim, Jin-Ho Choi, Han-Wook Yoo
Hypothalamic obesity is often complicated in patients with craniopharyngioma due to hypothalamic damage by the tumor itself, treatment modalities, and associated multiple pituitary hormone deficiency. Hypothalamic obesity causes secondary diseases such as nonalcoholic fatty liver disease (NAFLD) and diabetes mellitus (DM). We report a 19-year-old female who was diagnosed with craniopharyngioma, developed hypothalamic obesity after tumor resection, and progressed to hepatopulmonary syndrome. She manifested NAFLD 1 year after tumor resection...
March 2018: Annals of Pediatric Endocrinology & Metabolism
https://www.readbyqxmd.com/read/29601782/hepatic-phd2-hif-1%C3%AE-axis-is-involved-in-postexercise-systemic-energy-homeostasis
#19
Beibei Luo, Dao Xiang, Die Wu, Changcheng Liu, Yiqun Fang, Peijie Chen, Yi-Ping Hu
Exercise plays an important role in the prevention and treatment of chronic liver disease and associated metabolic disorders. A single bout of exercise induces tissue blood flow redistribution, which decreases splanchnic circulation and leads to physiologic hypoxia in the gastrointestinal system and liver. The transcription factor, hypoxia inducible factor-1α (HIF-1α), and its regulator, prolylhydroxylase 2 (PHD2), play pivotal roles in the response to oxygen flux by regulating downstream gene expression levels in the liver...
March 30, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29544682/intermittent-hypoxia-suppression-of-growth-hormone-and-insulin-like-growth-factor-i-in-the-neonatal-rat-liver
#20
Charles Cai, Taimur Ahmad, Gloria B Valencia, Jacob V Aranda, Jiliu Xu, Kay D Beharry
OBJECTIVES: Extremely low gestational age neonates with chronic lung disease requiring oxygen therapy frequently experience fluctuations in arterial oxygen saturation or intermittent hypoxia (IH). These infants are at risk for multi-organ developmental delay, reduced growth, and short stature. The growth hormone (GH)/insulin-like growth factor-I (IGF-1) system, an important hormonal regulator of lipid and carbohydrate metabolism, promotes neonatal growth and development. We tested the hypothesis that increasing episodes of IH delay neonatal growth by influencing the GH/IGF-I axis...
March 8, 2018: Growth Hormone & IGF Research
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