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erythropoiesis review

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https://www.readbyqxmd.com/read/29746307/erythropoietin-mimetic-peptides-and-erythropoietin-fusion-proteins-for-treating-anemia-of-chronic-kidney-disease
#1
Nupur Gupta, Jay B Wish
PURPOSE OF REVIEW: First generation erythropoiesis stimulating agents (ESAs) have short duration of action which requires administration once weekly or greater. Second generation ESAs were developed which have longer duration of action and can be administered one to two times monthly. Erythropoietin (EPO) mimetic peptides (EMPs) activate the EPO receptor but have no structural analogy to EPO, offering the potential for lower cost as they are not biologic drugs. The first approved EMP, peginesatide, was withdrawn from the market within a year of its approval because of fatal anaphylactic reactions...
May 4, 2018: Current Opinion in Nephrology and Hypertension
https://www.readbyqxmd.com/read/29746238/methods-for-studying-iron-regulatory-protein-1-an-important-protein-in-human-iron-metabolism
#2
Gregory P Holmes-Hampton, Manik C Ghosh, Tracey A Rouault
Iron regulatory proteins 1 and 2 (IRP1 and IRP2) are two cytosolic proteins that maintain cellular iron homeostasis by regulating the expression of genes involved in iron metabolism. IRPs respond to cellular iron deficiency by binding to iron-responsive elements (IREs) found in the mRNAs of iron metabolism transcripts, enhancing iron import, and reducing iron storage, utilization, and export. IRP1, a bifunctional protein, exists in equilibrium between a [Fe4 S4 ] cluster containing cytosolic aconitase, and an apoprotein that binds to IREs...
2018: Methods in Enzymology
https://www.readbyqxmd.com/read/29719207/the-intricate-role-of-selenium-and-selenoproteins-in-erythropoiesis
#3
REVIEW
Chang Liao, Bradley A Carlson, Robert F Paulson, K Sandeep Prabhu
Selenium (Se) is incorporated as the 21st amino acid selenocysteine (Sec) into the growing polypeptide chain of proteins involved in redox gatekeeper functions. Erythropoiesis presents a particular problem to redox regulation as the presence of iron, heme, and unpaired globin chains lead to high levels of free radical-mediated oxidative stress, which are detrimental to erythroid development and can lead to anemia. Under homeostatic conditions, bone marrow erythropoiesis produces sufficient erythrocytes to maintain homeostasis...
April 30, 2018: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/29695978/the-effects-of-altitude-training-on-erythropoietic-response-and-hematological-variables-in-adult-athletes-a-narrative-review
#4
REVIEW
Kamila Płoszczyca, Józef Langfort, Miłosz Czuba
Background: One of the goals of altitude training is to increase blood oxygen-carrying capacity in order to improve sea-level endurance performance in athletes. The elevated erythropoietin (EPO) production in hypoxia is a key factor in the achievement of enhanced hematological variables. The level of the EPO increase and acceleration of erythropoiesis depend on the duration of exposure and degree of hypoxia. Furthermore, many other factors may affect the hematological response to altitude training. Aim: The purpose of this narrative review was to: (1) analyze the kinetics of EPO and hematological variables during and after altitude training; (2) summarize the current state of knowledge about the possible causes of individual or cohort differences in EPO and hematological response to altitude training; (3) formulate practical guidelines for athletes to improve the efficiency of altitude training...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29680240/peptide-derivatives-of-erythropoietin-in-the-treatment-of-neuroinflammation-and-neurodegeneration
#5
Ilkcan Ercan, Kemal Ugur Tufekci, Ezgi Karaca, Sermin Genc, Kursad Genc
During the past 35 years, recombinant DNA technology has allowed the production of a wide range of hematopoietic and neurotrophic growth factors including erythropoietin (EPO). These have emerged as promising protein drugs in various human diseases. Accumulated evidences have recently demonstrated the neuroprotective effect of EPO in preclinical models of acute and chronic degenerative disorders. Nevertheless, tissue protective effect of EPO could not be translated to the clinical trials because of common lethal thromboembolic events, erythropoiesis and hypertension...
2018: Advances in Protein Chemistry and Structural Biology
https://www.readbyqxmd.com/read/29674976/neocytolysis-how-to-get-rid-of-the-extra-erythrocytes-formed-by-stress-erythropoiesis-upon-descent-from-high-altitude
#6
REVIEW
Heimo Mairbäurl
Neocytolysis is the selective destruction of those erythrocytes that had been formed during stress-erythropoiesis in hypoxia in order to increase the oxygen transport capacity of blood. Neocytolysis likely aims at decreasing this excess amount of erythrocytes and hemoglobin (Hb) when it is not required anymore and to decrease blood viscosity. Neocytolysis seems to occur upon descent from high altitude. Similar processes seem to occur in microgravity, and are also discussed to mediate the replacement of erythrocytes containing fetal hemoglobin (HbF) with those having adult hemoglobin (HbA) after birth...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29670613/innate-immunity-in-the-persistent-inflammation-immunosuppression-and-catabolism-syndrome-and-its-implications-for-therapy
#7
REVIEW
Hiroyuki Horiguchi, Tyler J Loftus, Russell B Hawkins, Steven L Raymond, Julie A Stortz, McKenzie K Hollen, Brett P Weiss, Elizabeth S Miller, Azra Bihorac, Shawn D Larson, Alicia M Mohr, Scott C Brakenridge, Hironori Tsujimoto, Hideki Ueno, Frederick A Moore, Lyle L Moldawer, Philip A Efron
Clinical and technological advances promoting early hemorrhage control and physiologic resuscitation as well as early diagnosis and optimal treatment of sepsis have significantly decreased in-hospital mortality for many critically ill patient populations. However, a substantial proportion of severe trauma and sepsis survivors will develop protracted organ dysfunction termed chronic critical illness (CCI), defined as ≥14 days requiring intensive care unit (ICU) resources with ongoing organ dysfunction...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29666917/measurement-of-iron-status-in-chronic-kidney-disease
#8
Wesley Hayes
Anemia is a common complication of chronic kidney disease (CKD) in children, and dysregulation of iron homeostasis plays a central role in its pathogenesis. Optimizing iron status is a prerequisite for effective treatment of anemia. Insufficient iron can lead to inappropriate escalation of the erythropoiesis-stimulating agent (ESA) dose, which is associated with adverse outcomes. Excess iron supplementation also has negative sequelae including free radical tissue damage and increased risk of systemic infection...
April 17, 2018: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/29655605/physiology-and-pathophysiology-of-renal-erythropoietin-producing-cells
#9
REVIEW
Hong-Mou Shih, Chih-Jen Wu, Shuei-Liong Lin
Anemia is a common complication and contributes to increased morbidity and mortality in chronic kidney disease (CKD) patients. Whereas there has been a significant improvement of understanding the underlying mechanism of erythropoiesis, the treatment of renal anemia is still restricted to erythropoietin (EPO)-stimulating agents. The purpose of this article is to review the physiology of erythropoiesis, functional role of EPO and underlying molecular and cellular basis that regulate EPO production. Regulation of EPO production is at mRNA level...
April 11, 2018: Journal of the Formosan Medical Association, Taiwan Yi Zhi
https://www.readbyqxmd.com/read/29551752/erythropoiesis-epo-macrophages-and-bone
#10
REVIEW
Joshua T Eggold, Erinn B Rankin
The regulation of erythropoiesis in the bone marrow microenvironment is a carefully orchestrated process that is dependent upon both systemic and local cues. Systemic erythropoietin (EPO) production by renal interstitial cells plays a critical role in maintaining erythropoietic homeostasis. In addition, there is increasing clinical and preclinical data linking changes in EPO and erythropoiesis to altered skeletal homeostasis, suggesting a functional relationship between the regulation of erythropoiesis and bone homeostasis...
March 15, 2018: Bone
https://www.readbyqxmd.com/read/29546732/folate-supplementation-in-people-with-sickle-cell-disease
#11
REVIEW
Ruchita Dixit, Sowmya Nettem, Simerjit S Madan, Htoo Htoo Kyaw Soe, Adinegara Bl Abas, Leah D Vance, Patrick J Stover
BACKGROUND: Sickle cell disease (SCD) is a group of disorders that affects haemoglobin, which causes distorted sickle- or crescent-shaped red blood cells. It is characterized by anaemia, increased susceptibility to infections and episodes of pain. The disease is acquired by inheriting abnormal genes from both parents, the combination giving rise to different forms of the disease. Due to increased erythropoiesis in people with SCD, it is hypothesized that they are at an increased risk for folate deficiency...
March 16, 2018: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29509320/is-there-an-established-hemoglobin-target-range-for-patients-undergoing-chronic-dialysis
#12
Hitesh H Shah, Steven Fishbane
Anemia is a common complication of advanced chronic kidney disease (CKD). Treatment with erythropoiesis-stimulating agents (ESAs) remains a common approach in managing anemia of CKD. The 2012 Kidney Disease Improving Global Outcomes Clinical Practice Guideline for Anemia in CKD suggests avoiding ESA therapy use to maintain Hb level above 11.5 g/dL. However, optimal Hb target range in adult patients undergoing chronic dialysis remains unknown. Clinical studies suggest risks associated with normalization of Hb levels in adult patients with CKD...
March 6, 2018: Seminars in Dialysis
https://www.readbyqxmd.com/read/29508392/efnb2-haploinsufficiency-causes-a-syndromic-neurodevelopmental-disorder
#13
J Lévy, D Haye, N Marziliano, G Casu, F Guimiot, C Dupont, N Teissier, B Benzacken, P Gressens, E Pipiras, A Verloes, A-C Tabet
Ephrin B2, one of the ligand of the EphB receptors, is involved in a complex signaling pathway regulating the development of the nervous system, neuronal migration, erythropoiesis and vasculogenesis. We report a patient with a de novo variant in EFNB2 and a family in which segregates a 610-kb deletion at chromosome 13q33 encompassing only ARGLU1 and EFNB2 genes. The de novo variant was observed in a patient with anal stenosis, hypoplastic left ventricle and mild developmental delay. The deletion was identified in 2 sibs with congenital heart defect and mild developmental delay...
June 2018: Clinical Genetics
https://www.readbyqxmd.com/read/29497418/african-trypanosomiasis-associated-anemia-the-contribution-of-the-interplay-between-parasites-and-the-mononuclear-phagocyte-system
#14
REVIEW
Benoit Stijlemans, Patrick De Baetselier, Stefan Magez, Jo A Van Ginderachter, Carl De Trez
African trypanosomosis (AT) is a chronically debilitating parasitic disease of medical and economic importance for the development of sub-Saharan Africa. The trypanosomes that cause this disease are extracellular protozoan parasites that have developed efficient immune escape mechanisms to manipulate the entire host immune response to allow parasite survival and transmission. During the early stage of infection, a profound pro-inflammatory type 1 activation of the mononuclear phagocyte system (MPS), involving classically activated macrophages (i...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29484447/enhancer-dna-methylation-in-acute-myeloid-leukemia-and-myelodysplastic-syndromes
#15
REVIEW
Leonidas Benetatos, George Vartholomatos
DNA methylation (CpG methylation) exerts an important role in normal differentiation and proliferation of hematopoietic stem cells and their differentiated progeny, while it has also the ability to regulate myeloid versus lymphoid fate. Mutations of the epigenetic machinery are observed in hematological malignancies including acute myeloid leukemia (AML) and myelodysplastic syndromes (MDS) resulting in hyper- or hypo-methylation affecting several different pathways. Enhancers are cis-regulatory elements which promote transcription activation and are characterized by histone marks including H3K27ac and H3K4me1/2...
June 2018: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/29471979/future-alternative-therapies-in-the-pipeline-for-mild-neonatal-encephalopathy-review-of-evidence-of-neuroprotection-with-erythropoiesis-stimulating-agents
#16
Tara DuPont, Lina Chalak
No abstract text is available yet for this article.
February 20, 2018: Early Human Development
https://www.readbyqxmd.com/read/29458736/emerging-therapies
#17
REVIEW
Amaliris Guerra, Khaled M Musallam, Ali T Taher, Stefano Rivella
At present, the only definitive cure for β-thalassemia is a bone marrow transplant (BMT); however, HLA-blood-matched donors are scarcely available. Current therapies undergoing clinical investigation with most potential for therapeutic benefit are the β-globin gene transfer of patient-specific hematopoietic stem cells followed by autologous BMT. Other emerging therapies deliver exogenous regulators of several key modulators of erythropoiesis or iron homeostasis. This review focuses on current approaches for the treatment of hemoglobinopathies caused by disruptions of β-globin...
April 2018: Hematology/oncology Clinics of North America
https://www.readbyqxmd.com/read/29452096/the-macrophage-heme-heme-oxygenase-1-system-and-its-role-in-inflammation
#18
REVIEW
Vijith Vijayan, Frank A D T G Wagener, Stephan Immenschuh
Heme oxygenase (HO)-1, the inducible isoform of the heme-degrading enzyme HO, plays a critical role in inflammation and iron homeostasis. Regulatory functions of HO-1 are mediated via the catalytic breakdown of heme, which is an iron-containing tetrapyrrole complex with potential pro-oxidant and pro-inflammatory effects. In addition, the HO reaction produces the antioxidant and anti-inflammatory compounds carbon monoxide (CO) and biliverdin, subsequently converted into bilirubin, along with iron, which is reutilized for erythropoiesis...
February 13, 2018: Biochemical Pharmacology
https://www.readbyqxmd.com/read/29439330/hypoxia-induced-signaling-activation-in-neurodegenerative-diseases-targets-for-new-therapeutic-strategies
#19
Niraj Kumar Jha, Saurabh Kumar Jha, Renu Sharma, Dhiraj Kumar, Rashmi K Ambasta, Pravir Kumar
For the maintenance of cellular homeostasis and energy metabolism, an uninterrupted supply of oxygen (O2) is routinely required in the brain. However, under the impaired level of O2 (hypoxia) or reduced blood flow (ischemia), the tissues are not sufficiently oxygenated, which triggers disruption of cellular homeostasis in the brain. Hypoxia is known to have a notable effect on controlling the expression of proteins involved in a broad range of biological processes varying from energy metabolism, erythropoiesis, angiogenesis, neurogenesis to mitochondrial trafficking and autophagy, thus facilitating neuronal cells to endure in deprived O2...
2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29404920/management-of-anemia-in-patients-with-inflammatory-bowel-disease-ibd
#20
REVIEW
Dhruvan Patel, Chinmay Trivedi, Nabeel Khan
PURPOSE OF REVIEW: Anemia is the most common complication as well as an extra intestinal manifestation of inflammatory bowel disease (IBD). It is associated with a significant impact on patient's quality of life (QoL); as well it represents a common cause of frequent hospitalization, delay of hospital inpatient discharge and overall increased healthcare burden. In spite of all these, anemia is still often underdiagnosed and undertreated. Our aim in this review is to provide a pathway for physicians to help them achieve early diagnosis as well as timely and appropriate treatment of anemia which in turn would hopefully reduce the prevalence and subsequent complications of this condition among IBD patients...
March 2018: Current Treatment Options in Gastroenterology
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