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https://www.readbyqxmd.com/read/29145693/early-erythropoiesis-stimulating-agents-in-preterm-or-low-birth-weight-infants
#1
REVIEW
Arne Ohlsson, Sanjay M Aher
BACKGROUND: Preterm infants have low plasma levels of erythropoietin (EPO), providing a rationale for the use of erythropoiesis-stimulating agents (ESAs) to prevent or treat anaemia and to provide neuro protection and protection against necrotising enterocolitis (NEC). Darbepoetin (Darbe) and EPO are currently available ESAs. OBJECTIVES: To assess the effectiveness and safety of ESAs (erythropoietin (EPO) and/or Darbe) initiated early (before eight days after birth) compared with placebo or no intervention in reducing red blood cell (RBC) transfusions, adverse neurological outcomes, and feeding intolerance including necrotising enterocolitis (NEC) in preterm and/or low birth weight infants...
November 16, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29138743/renal-adenocarcinoma-associated-erythrocytosis-in-a-cat-clinicopathological-features-and-immunohistochemical-results
#2
Roberta Troia, Chiara Agnoli, Federico Fracassi, Giuliano Bettini, Alessandra Sfacteria, Luciano Pisoni, Francesco Dondi
This report documents a case of secondary inappropriate erythrocytosis in a cat with renal cell adenocarcinoma, its stabilization through manual erythrocytapheresis, and the EPO-immunostaining on the affected kidney. An 11-year-old cat was presented with lethargy, weight loss and polyuria/polydipsia. An abdominal mass was detected upon physical examination. Clinicopathological work-up revealed marked erythrocytosis (HCT value 64.8%), renal azotemia and decreased urine specific gravity (USG). An abdominal ultrasound was performed, localizing the mass in the right kidney...
2017: Open veterinary journal
https://www.readbyqxmd.com/read/29138535/comparable-pharmacokinetics-and-pharmacodynamics-of-two-epoetin-alfa-formulations-eporon-%C3%A2-and-eprex-%C3%A2-following-a-single-subcutaneous-administration-in-healthy-male-volunteers
#3
Sumin Yoon, Su-Jin Rhee, Sun Ju Heo, Tae Young Oh, Seo Hyun Yoon, Joo-Youn Cho, SeungHwan Lee, Kyung-Sang Yu
Purpose: This study aimed to assess and compare the pharmacokinetic (PK) and pharmacodynamic (PD) properties following a single subcutaneous injection of epoetin alfa (Eporon(®)) with those of the comparator (Eprex(®)) in healthy male subjects. Subjects and methods: A randomized, double-blind, two-sequence, crossover study was conducted. Subjects were randomly assigned to receive a single dose, that is, 4,000 IU, of the test or comparator epoetin alfa. After 4 weeks, all subjects received the alternative formulation...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/29137269/local-blockage-of-self-sustainable-erythropoietin-signaling-suppresses-tumor-progression-in-non-small-cell-lung-cancer
#4
Lei He, Shouzhen Wu, Qiang Hao, Elhadji M Dioum, Kuo Zhang, Cun Zhang, Weina Li, Wei Zhang, Yingqi Zhang, Jiming Zhou, Zhijun Pang, Lijuan Zhao, Xiaowen Ma, Meng Li, Qiuyang Zhang
Functional significance of co-expressed erythropoietin (EPO) and its receptor (EPOR) in non-small cell lung cancer (NSCLC) had been under debate. In this study, co-overexpression of EPO/EPOR was confirmed to be positively associated with poor survival in NSCLC. The serum EPO in 14 of 35 enrolled NSCLC patients were found elevated significantly and decreased to normal level after tumor resection. With primary tumor cell culture and patient-derived tumor xenograft (PDX) mouse model, the EPO secretion from the tumors of these 14 patients was verified...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29133225/longitudinal-evaluation-of-chronic-rhinosinusitis-symptoms-in-a-population-based-sample
#5
Agnes S Sundaresan, Annemarie G Hirsch, Amanda J Young, Jonathan Pollak, Bruce K Tan, Robert P Schleimer, Robert C Kern, Thomas L Kennedy, J Scott Greene, Walter F Stewart, Karen Bandeen-Roche, Brian S Schwartz
BACKGROUND: Chronic rhinosinusitis (CRS) is a prevalent and disabling condition of the nose and sinuses. The natural history of CRS symptoms in a general population sample has not been previously studied. OBJECTIVE: In a general population-based sample from Pennsylvania, we used 2 questionnaires mailed 6 months apart to estimate the prevalence of, and identify predictors for, stability or change in symptoms over time. METHODS: We mailed the baseline and 6-month follow-up questionnaires to 23,700 primary care patients and 7,801 baseline responders, respectively...
November 10, 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/29127662/jnj7777120-ameliorates-inflammatory-and-oxidative-manifestations-in-a-murine-model-of-contact-hypersensitivity-via-modulation-of-tlr-and-nrf2-signaling
#6
Ahmed F Mohamed, Mohammed F El-Yamany, Fatma A El-Batrawy, Mohamed T Abdel-Aziz
JNJ7777120, a histamine H4 receptor antagonist, was shown to be effective in different experimental settings of allergic inflammation, including contact hypersensitivity. Toll-like receptors (TLRs) are thought to function as a link between innate and adaptive immune responses to various haptens. Here, we studied the suppression of TLR signaling as a possible mechanism by which JNJ7777120 exerts its anti-inflammatory effects against the chemical hapten, fluorescein isothiocyanate (FITC). The potential anti-oxidant effect of JNJ7777120 in this model was also examined...
November 10, 2017: Inflammation
https://www.readbyqxmd.com/read/29127105/epor2-%C3%A3-cr2-independendent-effects-of-low-dose-epoetin-a-in-porcine-liver-transplantation
#7
Linus Kebschull, Leon Franz Christoph Theilmann, Annika Mohr, Wencke Uennigmann, Sandra Stoeppeler, Barbara Heitplatz, Hans-Ullrich Spiegel, Ralf Bahde, Daniel Michael Palmes, Felix Becker
Ischemia-reperfusion injury (IRI) remains the key component of graft damage during transplantation. Erythropoietin (EPO) induces anti-inflammatory and anti-apoptotic effects via the EPOR2/ßcR2-complex, with the potential risk of thrombosis. Previous work indicates that EPO has EPOR2/ßcR2-independent protective effects via direct effects on the endothelium. As the EPOR2/ßcR2-receptor has a very low affinity for EPO, we aimed to test the hypothesis that EPO doses below the level that stimulate this receptor elicit cytoprotective effects via endothelial stimulation in a porcine liver transplantation model...
November 10, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/29123527/erythropoietin-increases-myelination-in-oligodendrocytes-gene-expression-profiling-reveals-early-induction-of-genes-involved-in-lipid-transport-and-metabolism
#8
Georgina Gyetvai, Trisha Hughes, Florence Wedmore, Cieron Roe, Lamia Heikal, Pietro Ghezzi, Manuela Mengozzi
Several studies have shown that erythropoietin (EPO) has neuroprotective or neuroreparative actions on diseases of the nervous system and that improves oligodendrocyte (OL) differentiation and myelination in vivo and in vitro. This study aims at investigating the early molecular mechanisms for the pro-myelinating action of EPO at the gene expression level. For this purpose, we used a differentiating OL precursor cell line, rat central glia-4 cells. Cells were differentiated or not, and then treated with EPO for 1 or 20 h...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29122552/nephroprotection-through-the-akt-enos-pathway-by-centrally-administered-erythropoietin-in-a-rat-model-of-fixed-volume-hemorrhage
#9
Behjat Seifi, Mehri Kadkhodaee, Mina Ranjbaran, Enayatollah Bakhshi
AIMS: This study was designed to investigate the protective effects of centrally administered erythropoietin (EPO) on brain oxidative stress and inflammatory markers to protect the kidneys during hemorrhagic shock (HS). MAIN METHODS: Animals were assigned into three groups (n=6). Sham rats were subjected to cannulation of femoral artery and vein as well as stereotaxic surgery. In HS group, 50% of total blood volume was withdrawn and resuscitation was started 2h later...
November 6, 2017: Life Sciences
https://www.readbyqxmd.com/read/29121822/investigation-of-efficacy-of-treatment-in-spinal-cord-injury-erythropoietin-versus-methylprednisolone
#10
Okan Ozkunt, Kerim Sariyilmaz, Halil Can Gemalmaz, Seren Gülsen Gürgen, Ulaş Yener, Fatih Dikici
BACKGROUND: Investigation of the expression of platelet-derived growth factor (PDGF)-β and glial fibrillary acidic protein (GFAP) in rats with spinal cord injury as a marker of neurologic recovery between groups treated with erythropoietin (EPO) and methylprednisolone (MP). METHODS: Thirty adult female rats were randomly divided into three even groups. A laminectomy was applied to thoracic ninth vertebra and contusion injury was induced by extradural application of an aneurysm clip...
September 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/29120671/erythropoietin-reduces-collagen-deposition-after-myocardial-infarction-but-does-not-improve-cardiac-function
#11
Fernanda G Pessoa, Charles Mady, Keila C B Fonseca, Adriana M Oliveira-Fonoff, Vera M C Salemi, Mauricio R Jordao, Fabio Fernandes, Felix J A Ramires
Myocardial remodeling includes inappropriate collagen deposition in the interstitium. Erythropoietin (EPO) may have cardioprotective effects. We aimed to assess the role of EPO on myocardial remodeling during the chronic phase. We studied 60 Wistar rats divided into Control (CT), Control+EPO (CT+EPO), Infarcted+EPO (MI+EPO), and Infarcted (MI). The interstitial collagen volume fraction (ICVF) was quantified. Echocardiography was performed. We quantified ADMA and glutathione by ELISA, and RT-PCR to assess apoptosis and inflammation...
November 9, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/29118187/jnk2-upregulates-hypoxia-inducible-factors-and-contributes-to-hypoxia-induced-erythropoiesis-and-pulmonary-hypertension
#12
Marc A Sala, Cong Chen, Qiao Zhang, Hanh Chi Do-Umehara, Wenjiao Wu, Alexander V Misharin, Gregory B Waypa, Deyu Fang, G R Scott Budinger, Shuwen Liu, Navdeep S Chandel, Paul T Schumacker, Jacob I Sznajder, Jing Liu
The hypoxic response is a stress response triggered by low-oxygen tension. Hypoxia-inducible factors (HIFs) play a prominent role in the pathobiology of hypoxia-associated conditions, including pulmonary hypertension (PH) and polycythemia. The c-Jun N-terminal protein kinase (JNK), a stress-activated protein kinase that consists of two ubiquitously expressed isoforms, JNK1 and JNK2, and a tissue-specific isoform, JNK3, has been shown to be activated by hypoxia. However, the physiological role of JNK1 and JNK2 in the hypoxic response remains elusive...
November 8, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29115516/phosphorylation-of-signal-transducer-and-activator-of-transcription-3-induced-by-hyperglycemia-is-different-with-that-induced-by-lipopolysaccharide-or-erythropoietin-via-receptor%C3%A2-coupled-signaling-in-cardiac-cells
#13
Yu-Hsin Chiu, Po-Ming Ku, Yung-Ze Cheng, Yingxiao Li, Juei-Tang Cheng, Ho-Shan Niu
The signal transducer and activator of transcription 3 (STAT3) is known to be involved in hypertrophy and fibrosis in cardiac dysfunction. The activation of STAT3 via the phosphorylation of STAT3 is required for the production of functional activity. It has been established that lipopolysaccharide (LPS)‑induced phosphorylation of STAT3 in cardiomyocytes primarily occurs through a direct receptor‑mediated action. This effect is demonstrated to be produced rapidly. STAT3 in cardiac fibrosis of diabetes is induced by high glucose through promotion of the STAT3‑associated signaling pathway...
November 6, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29115443/erythropoietin-signaling-increases-neurogenesis-and-oligodendrogenesis-of-endogenous-neural-stem-cells-following-spinal-cord-injury-both-in%C3%A2-vivo-and-in%C3%A2-vitro
#14
Hui Zhang, Xiao Fang, Dake Huang, Qingli Luo, Meijuan Zheng, Kangkang Wang, Le Cao, Zongsheng Yin
Erythropoietin (Epo) promotes functional recovery following spinal cord injury (SCI); however, the exact underlying mechanisms are yet to be determined. Although endogenous neural stem cells (NSCs) in the adult spinal cord are a therapeutic target in SCI models, the effect of Epo on this NSC population remains unknown. The present study investigated the effects of Epo on endogenous NSCs in the adult spinal cord both in vitro and in vivo. For the in vivo analyses, normal rats (Normal) and SCI contusion model rats (SCI) received either recombinant human Epo or saline treatment for 7 days (5,000 U/kg), and spinal cords were subsequently analyzed at 2, 8, and 14 days...
October 25, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29115389/renoprotective-effect-of-erythropoietin-via-modulation-of-the-stat6-mapk-nf-%C3%AE%C2%BAb-pathway-in-ischemia-reperfusion-injury-after-renal-transplantation
#15
Jinhua Zhang, Daqiang Zhao, Ning Na, Heng Li, Bin Miao, Liangqing Hong, Zhengyu Huang
Ischemia/reperfusion injury (IRI) commonly occurs in renal transplantation. Erythropoietin (EPO) exerts a protective effect in IRI. To investigate the underlying molecular mechanism, rat models of renal IRI were established and treated with EPO and/or lentivirus‑mediated EPO-siRNA, the signal transducer and activator of transcription 6 (STAT6) inhibitor AS1517499, the JNK inhibitor SP600125, the p38 mitogen-activated protein kinase (MAPK) inhibitor SB203580, and the nuclear factor (NF)-κB inhibitor lactacystin...
October 20, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29109360/investigation-of-the-pronounced-erythropoietin-induced-reduction-in-hyperglycemia-in-type-1-like-diabetic-rats
#16
Shu-Chun Kuo, Yingxiao Li, Kai-Chun Cheng, Chiang-Shan Niu, Juei-Tang Cheng, Ho-Shan Niu
Erythropoietin (EPO) is known to stimulate erythropoiesis after binding with its specific receptor. In clinics, EPO is widely used in hemodialyzed patients with diabetes. However, changes in the expression of the erythropoietin receptor (EPOR) under diabetic conditions are still unclear. Therefore, we investigated EPOR expression both in vivo and in vitro. Streptozotocin-induced type 1-like diabetic rats (STZ rats) were used to evaluate the blood glucose-lowering effects of EPO. The expression and activity of the transducer and activator of transcription 3 (STAT3), the potential signaling molecule, was investigated in cultured rat skeletal myoblast (L6) cells incubated in high-glucose (HG) medium to mimic the in vivo changes...
November 3, 2017: Endocrine Journal
https://www.readbyqxmd.com/read/29108271/hypoxia-related-biological-markers-as-predictors-of-epirubicin-based-treatment-responsiveness-and-resistance-in-locally-advanced-breast-cancer
#17
Manuela Milani, Sergio Venturini, Simone Bonardi, Giovanni Allevi, Carla Strina, Maria Rosa Cappelletti, Silvia Paola Corona, Sergio Aguggini, Alberto Bottini, Alfredo Berruti, Adrian Jubb, Leticia Campo, Adrian L Harris, Kevin Gatter, Stephen B Fox, Daniele Generali, Giandomenico Roviello
Purpose: To identify hypoxia-related biomarkers indicative of response and resistance to epirubicin treatment in patients with locally advanced breast cancer. Patients and Methods: One hundred seventy-six women with T2-4 N0-1 breast tumours were randomly assigned to receive epirubicin 120 mg/m2/1-21 (EPI ARM), epirubicin 120 mg/m2/1-21 + erythropoietin 10.000 IU sc three times weekly (EPI-EPO ARM) and epirubicin 40 mg/m2/w-q21 (EPI-W ARM). Sixteen tumour proteins involved in cell survival, hypoxia, angiogenesis and growth factor, were assessed by immunohistochemistry in pre-treatment samples...
October 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/29104499/erythropoietin-reduces-insulin-resistance-via-regulation-of-its-receptor-mediated-signaling-pathways-in-db-db-mice-skeletal-muscle
#18
Yu Pan, Xiu Hong Yang, Li Li Guo, Yan Hong Gu, Qing Yan Qiao, Hui Min Jin
Erythropoietin (EPO) can reduce insulin resistance (IR) in adipocytes; however, it is unknown whether EPO can decrease IR in skeletal muscle. Here we investigated whether EPO could reduce IR in type 2 diabetic mouse skeletal muscle and its possible signaling mechanisms of action. Twelve-week-old db/db diabetic mice were employed in this study. Systemic use of EPO improved glucose profiles in type 2 diabetic mice after 4 and 8 weeks treatment. EPO up-regulated EPOR protein expression in skeletal muscle, and subsequently activated downstream signaling molecules such as JAK2, IRS-1, PI3K, AKT, and eNOS...
2017: International Journal of Biological Sciences
https://www.readbyqxmd.com/read/29102603/erythropoietin-ameliorates-early-brain-injury-after-subarachnoid-haemorrhage-by-modulating-microglia-polarization-via-the-epor-jak2-stat3-pathway
#19
Shanwu Wei, Chunxia Luo, Shanping Yu, Jin Gao, Chang Liu, Zheng Wei, Zhiren Zhang, Ling Wei, Bin Yi
Inflammatory modulation mediated by microglial M1/M2 polarization is one of the main pathophysiological processes involved in early brain injury (EBI) after subarachnoid haemorrhage (SAH). Previous studies have shown that recombinant human erythropoietin (rhEPO) alleviates EBI following experimental SAH. However, the mechanisms of this beneficial effect are still poorly understood. Recent research has suggested that EPO shows anti-inflammatory properties. Therefore, we tried to analyse whether rhEPO administration influenced microglial M1/M2 polarization in early brain injury after SAH and to identify the underlying molecular mechanism of any such effect...
November 1, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/29100648/erythropoietin-s-beta-common-receptor-mediates-neuroprotection-in-spinal-cord-neurons
#20
Lisa S Foley, David A Fullerton, Joshua Mares, Mitchell Sungelo, Michael J Weyant, Joseph C Cleveland, T Brett Reece
BACKGROUND: Paraplegia from spinal cord ischemia-reperfusion (SCIR) remains an elusive and devastating complication of complex aortic operations. Erythropoietin (EPO) attenuates this injury in models of SCIR. Upregulation of the EPO beta common receptor (βcR) is associated with reduced damage in models of neural injury. The purpose of this study was to examine whether EPO-mediated neuroprotection was dependent on βcR expression. We hypothesized that spinal cord neurons subjected to oxygen-glucose deprivation would mimic SCIR injury in aortic surgery and EPO treatment attenuates this injury in a βcR-dependent fashion...
October 31, 2017: Annals of Thoracic Surgery
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