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Erythropoietine

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https://www.readbyqxmd.com/read/28732065/direct-targets-of-pstat5-signalling-in-erythropoiesis
#1
Kevin R Gillinder, Hugh Tuckey, Charles C Bell, Graham W Magor, Stephen Huang, Melissa D Ilsley, Andrew C Perkins
Erythropoietin (EPO) acts through the dimeric erythropoietin receptor to stimulate proliferation, survival, differentiation and enucleation of erythroid progenitor cells. We undertook two complimentary approaches to find EPO-dependent pSTAT5 target genes in murine erythroid cells: RNA-seq of newly transcribed (4sU-labelled) RNA, and ChIP-seq for pSTAT5 30 minutes after EPO stimulation. We found 302 pSTAT5-occupied sites: ~15% of these reside in promoters while the rest reside within intronic enhancers or intergenic regions, some >100kb from the nearest TSS...
2017: PloS One
https://www.readbyqxmd.com/read/28729420/revisiting-the-substrate-specificity-of-mammalian-%C3%AE-1-6-fucosyltransferase-fut8-reveals-that-it-catalyzes-core-fucosylation-of-n-glycans-lacking-%C3%AE-1-3-arm-glcnac
#2
Qiang Yang, Roushu Zhang, Hui Cai, Lai-Xi Wang
The mammalian α1,6-fucosyltransferase (FUT8) catalyzes the core fucosylation of N-glycans in the biosynthesis of glycoproteins. Previously, intensive in vitro studies with crude extract or purified enzyme concluded that the attachment of a GlcNAc on the α1,3 mannose arm of N-glycan is essential for FUT8 catalyzed core fucosylation. In contrast, we have recently shown that expression of erythropoietin (EPO) in a GnTI-knockout, FUT8 overexpressing cell line results in the production of fully core-fucosylated glycoforms of the oligomannose substrate Man5GlcNAc2, suggesting that FUT8 can catalyze core fucosylation of N-glycans lacking an α1,3arm GlcNAc in cells...
July 20, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28718181/erythropoietin-for-cognitive-deficits-associated-with-schizophrenia-bipolar-disorder-and-major-depression-a-systematic-review
#3
Xian-Bin Li, Wei Zheng, Yu-Ping Ning, Dong-Bin Cai, Xin-Hu Yang, Gabor S Ungvari, Chee H Ng, Chuan-Yue Wang, Yu-Tao Xiang
Introduction The purpose of this study is to systematically review the efficacy and safety of adjunctive erythropoietin (EPO) in treating cognitive deficits associated with schizophrenia, bipolar disorder, and major depression based on randomized controlled trials (RCTs). Methods Two evaluators independently and systematically searched and selected studies, extracted data, and conducted quality assessment. Results Four RCTs with 144 patients (71 in the EPO group and 73 in the placebo group) met the study entry criteria...
July 17, 2017: Pharmacopsychiatry
https://www.readbyqxmd.com/read/28716301/discrete-%C3%AE-adrenergic-mechanisms-regulate-early-and-late-erythropoiesis-in-erythropoietin-resistant-anemia
#4
Shirin Hasan, Michael J Mosier, Andrea Szilagyi, Richard L Gamelli, Kuzhali Muthumalaiappan
BACKGROUND: Anemia of critical illness is resistant to exogenous erythropoietin. Packed red blood cells transfusions is the only treatment option, and despite related cost and morbidity, there is a need for alternate strategies. Erythrocyte development can be divided into erythropoietin-dependent and erythropoietin-independent stages. We have shown previously that erythropoietin-dependent development is intact in burn patients and the erythropoietin-independent early commitment stage, which is regulated by β1/β2-adrenergic mechanisms, is compromised...
July 14, 2017: Surgery
https://www.readbyqxmd.com/read/28714517/overexpression-of-the-erythropoietin-receptor-in-rama-37-breast-cancer-cells-alters-cell-growth-and-sensitivity-to-tamoxifen
#5
Lenka Ilkovičová, Nina Trošt, Erika Szentpéteriová, Peter Solár, Radovan Komel, Nataša Debeljak
Erythropoietin (EPO) is the main regulator of erythropoiesis, and its receptor (EPOR) is expressed in various tissues, including tumors. Expression of EPOR in breast cancer tissue has been shown to correlate with expression of the estrogen receptor (ER). However, EPOR promotes proliferation in an EPO-independent manner. In patients with breast cancer, EPOR is associated with impaired tamoxifen response in ER-positive tumors, but not in ER-negative tumors. Furthermore, a positive correlation between EPOR/ER status and increased local cancer recurrence has been demonstrated, and EPOR expression is associated with G-protein coupled ER (GPER)...
August 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28706253/affinity-purification-of-erythropoietin-from-cell-culture-supernatant-combined-with-maldi-tof-ms-analysis-of-erythropoietin-n-glycosylation
#6
David Falck, Markus Haberger, Rosina Plomp, Michaela Hook, Patrick Bulau, Manfred Wuhrer, Dietmar Reusch
Erythropoietin (EPO) is a heavily glycosylated hormone whose recombinant forms are used for treatment of anaemia. EPO glycosylation is important for its pharmacological properties. An analytical workflow, which can determine EPO glycosylation in an accurate and high-throughput fashion from cell culture supernatant (CCS) in approximately 24 h, offers the possibility to follow changes during production. To address this challenge, we present a complete workflow consisting of protein purification, glycan release, sialic acid derivatization, solid phase extraction, matrix-assisted laser desorption/ionization - mass spectrometry (MALDI-MS) analysis and MassyTools data processing...
July 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28705055/ferrokinetics-is-associated-with-the-left-ventricular-mass-index-in-patients-with-chronic-kidney-disease
#7
Akihito Tanaka, Daijo Inaguma, Yu Watanabe, Eri Ito, Naoki Kamegai, Hiroya Shimogushi, Hibiki Shinjo, Kiyomi Koike, Yasuhiro Otsuka, Asami Takeda
Background Patients with chronic kidney disease (CKD) often have the complication of anaemia. Usage of an erythropoietin-stimulating agent accelerates iron deficiency because it promotes iron utilization. Recently, iron administration was reported to be effective for patients with cardiac failure. We examined the association between ferrokinetics and cardiac function in patients with CKD. Methods In this cross-sectional study, we examined 558 patients (424 men and 134 women; mean age, 68.9 ± 13.1 years) with CKD who were admitted to our hospital...
July 14, 2017: Acta Cardiologica
https://www.readbyqxmd.com/read/28701754/clostridium-perfringens-%C3%AE-toxin-impairs-erythropoiesis-by-inhibition-of-erythroid-differentiation
#8
Teruhisa Takagishi, Masaya Takehara, Soshi Seike, Kazuaki Miyamoto, Keiko Kobayashi, Masahiro Nagahama
Clostridium perfringens α-toxin induces hemolysis of erythrocytes from various species, but it has not been elucidated whether the toxin affects erythropoiesis. In this study, we treated bone marrow cells (BMCs) from mice with purified α-toxin and found that TER119(+) erythroblasts were greatly decreased by the treatment. A variant α-toxin defective in enzymatic activities, phospholipase C and sphingomyelinase, had no effect on the population of erythroblasts, demonstrating that the decrease in erythroblasts was dependent of its enzymatic activities...
July 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28697735/v-j-combinations-of-t-cell-receptor-predict-responses-to-erythropoietin-in-end-stage-renal-disease-patients
#9
Henry Sung-Ching Wong, Che-Mai Chang, Chih-Chin Kao, Yu-Wen Hsu, Xiao Liu, Wen-Chang Chang, Mai-Szu Wu, Wei-Chiao Chang
BACKGROUND: Anemia is common among end-stage renal disease (ESRD) patients who undergone hemodialysis. The total reduction of red blood cell (RBC) count is associated with poor prognosis in these patients. Although erythropoietin (EPO) has been used as an effective treatment for ESRD patients with anemia, a large number of patients still present poor responses to EPO treatment. METHODS: We measured T-cell receptor sequencing profiles, including length of complementarity-deteremining region 3 (CDR3), intra- and inter-group (EPO resistant vs...
July 11, 2017: Journal of Biomedical Science
https://www.readbyqxmd.com/read/28690645/neuroprotective-effects-of-erythropoietin-against-hypoxic-injury-via-modulation-of-the-mitogen-activated-protein-kinase-pathway-and-apoptosis
#10
Ji Eun Jeong, Jae Hyun Park, Chun Soo Kim, Sang Lak Lee, Hai Lee Chung, Woo Taek Kim, Eun Joo Lee
PURPOSE: Hypoxic-ischemic encephalopathy is a significant cause of neonatal morbidity and mortality. Erythropoietin (EPO) is emerging as a therapeutic candidate for neuroprotection. Therefore, this study was designed to determine the neuroprotective role of recombinant human EPO (rHuEPO) and the possible mechanisms by which mitogen-activated protein kinase (MAPK) signaling pathway including extracellular signal-regulated kinase (ERK1/2), JNK, and p38 MAPK is modulated in cultured cortical neuronal cells and astrocytes...
June 2017: Korean Journal of Pediatrics
https://www.readbyqxmd.com/read/28688754/strategy-for-erythroid-differentiation-in-ex%C3%A2-vivo-cultures-lentiviral-genetic-modification-of-human-hematopoietic-stem-cells-with-erythropoietin-gene
#11
Luisina A Cappellino, Ricardo B Kratje, Marina Etcheverrigaray, Claudio C Prieto
If cultured in appropriate conditions, such as supplementing culture media with costly cytokines and growth factors, hematopoietic stem/progenitor cells (HSPCs) from different origins have shown to be an adequate source of erythroid cells. This requirement turns erythroid cells production into a complicated process to be scaled-up for future applications. The aim of our work was to genetically modify HSPCs with human erythropoietin (hEPO) sequence by lentiviral transgenesis in order for cells to secrete the hormone into the culture medium...
July 6, 2017: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/28686347/epo-modified-mscs-can-inhibit-asthmatic-airway-remodeling-in-an-animal-model
#12
Xin-Peng Han, Fang-Qi Zhang, Xiang-Shu Tan, Liang Liu, Wen-Xian Ma, Hai-Feng Ou-Yang, Chang-Gui Wu
OBJECTIVE: There was no effective measures can be obtained at present to reverse or prevent airway remodeling. We investigated the therapeutic effect of Erythropoietin (EPO) gene modified mesenchymal stem cells (MSCs) on asthmatic airway remodeling and the possible underlied molecular mechanisms. METHODS: EPO gene was transfected into MSCs via lentivirus vector. The transfected cells (EPO-MSCs) were identi?ed by ?ow cytometry and the EPO secreting function was detected by PCR and western blot...
July 7, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28682026/-clinical-management-of-anemia-in-patients-with-ckd
#13
Rodolfo Fernando Rivera, Maria Teresa Sciarrone Alibrandi, Luca Di Lullo, Fulvio Fioccari
Anemia is a frequent complication in chronic kidney disease (CKD), and it is often accompanied by various clinical symptoms. The primary cause of anemia in CKD patients is the reduction in the erythropoietin production, which results in a decrease of signaling molecule that stimulates red blood cell production. Other possible causes of anemia in CKD include iron deficiency, inflammation, and the accumulation of uremic toxin. This chapter focuses the discussion on the strategy of the management of anemia in patients with CKD...
March 2017: Giornale Italiano di Nefrologia: Organo Ufficiale Della Società Italiana di Nefrologia
https://www.readbyqxmd.com/read/28680358/interpretation-of-erythropoietin-and-haemoglobin-levels-in-patients-with-various-stages-of-chronic-kidney-disease
#14
Mirsad Panjeta, Ismet Tahirović, Emin Sofić, Jozo Ćorić, Amela Dervišević
BACKGROUND: The production of erythrocytes is regulated by the hormone erythropoietin (EPO), which maintains the blood haemoglobin (Hb) levels constant under normal conditions. Human EPO is a glycoprotein hormone and its synthesis is controlled by the hypoxia-inducible transcription factor. The aim of this study was to establish EPO and Hb levels in patients with chronic kidney disease (CKD), as well as in control subjects, and to investigate the relationship between these parameters...
April 2017: Journal of Medical Biochemistry
https://www.readbyqxmd.com/read/28676512/anemia-is-correlated-with-malnutrition-and-inflammation-in-croatian-peritoneal-dialysis-patients-a-multicenter-nationwide-study
#15
Josipa Radić, Nikolina Bašić-Jukić, Božidar Vujičić, Dragan Klarić, Goran Radulović, Marko Jakić, Klara Jurić, Karmela Altabas, Željka Grđan, Ivana Kovačević-Vojtušek, ValentináCorić Martinović, Nikola Janković, Marijana Gulin, Dragan Ljutić, Sanjin Rački
Malnutrition, inflammation, and anemia are common in peritoneal dialysis (PD) patients. In this study, correlations between Malnutrition Inflammation Score (MIS), laboratory and anthropometric parameters, and anemia indices in Croatian PD patients were analyzed. One hundred and one PD patients (males/females 54/47, age 58.71 ± 14.68 years, mean PD duration 21.82 ± 21.71 months) were included. Clinical, laboratory, and anthropometric parameters were measured. Statistically significant correlations between MIS and erythropoietin weekly dose per kg of body weight (ESA weekly dose), hemoglobin (Hb), and erythrocytes were found (r = 0...
July 2017: Peritoneal Dialysis International: Journal of the International Society for Peritoneal Dialysis
https://www.readbyqxmd.com/read/28676085/nasal-administration-of-the-neuroprotective-candidate-neuroepo-to-healthy-volunteers-a-randomized-parallel-open-label-safety-study
#16
Orestes Santos-Morales, Alina Díaz-Machado, Daise Jiménez-Rodríguez, Yaisel Pomares-Iturralde, Tatiana Festary-Casanovas, Carlos A González-Delgado, Sonia Pérez-Rodríguez, Eulalia Alfonso-Muñoz, Carmen Viada-González, Patricia Piedra-Sierra, Idrian García-García, Daniel Amaro-González, Julio César García-Rodríguez, Iliana Sosa-Testé, Alicia Lagarto-Parra, Laura Barrero-Viera, Marlene David-Baldo, Maura Tamayo-Rodríguez, Ivonne Rivero-Vázquez, Gricel González-Gamiz, Alis Martín-Trujillo, Yasmila Rodríguez-Fernández, Ana Alfa Ledo-de la Luz, Maylén Álvarez-Delgado, Ivón Howland-Álvarez, Yolanda Cruz-Gómez
BACKGROUND: Delivery of therapeutic agents as erythropoietin (EPO) into Central Nervous System through intranasal route could benefit patients with neurological disorders. A new nasal formulation containing a non-hematopoietic recombinant EPO (NeuroEPO) has shown neuroprotective actions in preclinical models. In the current study, the safety of NeuroEPO was evaluated for the first time in humans. METHODS: A phase I, randomized, parallel, open-label study was carried out in healthy volunteers...
July 4, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28675568/sciatic-nerve-regeneration-by-transplantation-of-schwann-cells-via-erythropoietin-controlled-releasing-polylactic-acid-multiwalled-carbon-nanotubes-gelatin-nanofibrils-neural-guidance-conduit
#17
Majid Salehi, Mahdi Naseri-Nosar, Somayeh Ebrahimi-Barough, Mohammdreza Nourani, Arash Khojasteh, Amir-Ali Hamidieh, Amir Amani, Saeed Farzamfar, Jafar Ai
The current study aimed to enhance the efficacy of peripheral nerve regeneration using an electrically conductive biodegradable porous neural guidance conduit for transplantation of allogeneic Schwann cells (SCs). The conduit was produced from polylactic acid (PLA), multiwalled carbon nanotubes (MWCNTs), and gelatin nanofibrils (GNFs) coated with the recombinant human erythropoietin-loaded chitosan nanoparticles (rhEpo-CNPs). The PLA/MWCNTs/GNFs/rhEpo-CNPs conduit had the porosity of 85.78 ± 0.70%, the contact angle of 77...
July 4, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28675513/itaca-a-new-validated-international-erythropoietic-stimulating-agent-response-score-that-further-refines-the-predictive-power-of-previous-scoring-systems
#18
Rena Buckstein, Enrico Balleari, Richard Wells, Valeria Santini, Alessandro Sanna, Chiara Salvetti, Elena Crisà, Bernardino Allione, Paolo Danise, Carlo Finelli, Marino Clavio, Antonella Poloni, Flavia Salvi, Daniela Cilloni, Esther Natalie Oliva, Pellegrino Musto, Brett Houston, Nancy Zhu, Michelle Geddes, Heather Leitch, Brian Leber, Mitchell Sabloff, Thomas J Nevill, Karen Yee, John M Storring, Janika Francis, Luca Maurillo, Roberto Latagliata, Maria Antonietta Aloe Spiriti, Alessandro Andriani, Anna Lina Piccioni, Luana Fianchi, Susanna Fenu, Svitlana Gumenyuk, Francesco Buccisano
BACKGROUND: In 'real-life', the Nordic score guides ESA use in lower-risk MDS with predicted response rates of 25% or 74%. As new treatments emerge, a more discriminating score is needed. OBJECTIVES: To validate existing ESA predictive scores and develop a new score that identifies non-responders. METHODS: ESA-treated patients were identified in 3 MDS registries in Italy and Canada (FISM 555, GROM 233, MDS-CAN 208). Clinical and disease-related variables were captured...
July 4, 2017: American Journal of Hematology
https://www.readbyqxmd.com/read/28674560/-management-of-chronic-hemodialysis-patients-with-anemia-case-study-conducted-in-the-department-of-nephrology-and-hemodialysis-at-the-university-hospital-point-g-in-mali
#19
Alhadji Ahmadou Tounkara, Abdoul Mahama Sériba Coulibaly, Nouhoun Coulibaly, Békaye Traoré, Mahamane Kalil Maïga
INTRODUCTION: Anemia is a frequent complication of Chronic Kidney Disease CKD commonly found in chronic haemodialysis patients. Patients management is mainly based on erythropoietin administration and iron supplementation. This study aimed to evaluate the management of chronic hemodialysis patients with anemia in the Department of Nephrology and Hemodialysis at the University Hospital Point G in Mali. METHODS: We conducted a cross-sectional study from 1 to 31 August 2016...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28669689/effects-of-erythropoietin-on-cycling-performance-of-well-trained-cyclists-a-double-blind-randomised-placebo-controlled-trial
#20
Jules A A C Heuberger, Joris I Rotmans, Pim Gal, Frederik E Stuurman, Juliëtte van 't Westende, Titiaan E Post, Johannes M A Daniels, Matthijs Moerland, Peter L J van Veldhoven, Marieke L de Kam, Herman Ram, Olivier de Hon, Jelle J Posthuma, Jacobus Burggraaf, Adam F Cohen
BACKGROUND: Substances that potentially enhance performance (eg, recombinant human erythropoietin [rHuEPO]) are considered doping and are therefore forbidden in sports; however, the scientific evidence behind doping is frequently weak. We aimed to determine the effects of rHuEPO treatment in well trained cyclists on maximal, submaximal, and race performance and on safety, and to present a model clinical study for doping research on other substances. METHODS: We did this double-blind, randomised, placebo-controlled trial at the Centre for Human Drug Research in Leiden (Netherlands)...
June 29, 2017: Lancet Haematology
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