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erythropoiesis review

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https://www.readbyqxmd.com/read/28410559/the-irony-of-iron-overload-and-iron-deficiency-in-chronic-obstructive-pulmonary-disease
#1
Suzanne M Cloonan, Sharon Mumby, Ian M Adcock, Augustine M K Choi, Kian Fan Chung, Gregory J Quinlan
Chronic obstructive pulmonary disease (COPD) is a debilitating inflammatory lung disease associated with cigarette smoking and is third leading cause of death worldwide. With the recent emergence of genome wide association studies (GWAS), the identification of multiple COPD susceptibility genes has enhanced and expanded our understanding of the pathogenic mechanisms associated with this debilitating lung disease. An example of such a pathogenic mechanism is the role of iron metabolism in the onset and progression of COPD...
April 14, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28408107/hydroxyurea-for-nontransfusion-dependent-%C3%AE-thalassemia-a-systematic-review-and-meta-analysis
#2
Ali H Algiraigri, Nicola A M Wright, Elizabeth Oddone Paolucci, Aliya Kassam
Nontransfusion-dependent β-thalassemia (NTDβT) syndromes consist of β-thalassemia intermedia and moderate hemoglobin E/β thalassemias. They are characterized by varying degrees of chronic anemia and a wide spectrum of complications due to ineffective erythropoiesis and iron overload from chronic transfusions. Hydroxyurea (HU), an oral chemotherapeutic drug, is anticipated to decrease disease severity. We performed a meta-analysis to evaluate the clinical efficacy and safety of HU in NTDβT patients of any age...
April 6, 2017: Hematology/oncology and Stem Cell Therapy
https://www.readbyqxmd.com/read/28395559/management-of-myelofibrosis-jak-inhibition-and-beyond
#3
Maximilian Stahl, Amer M Zeidan
Myelofibrosis (MF) is characterized by bone marrow fibrosis with subsequent extramedullary hematopoiesis and abnormal cytokine expression leading to splenomegaly, constitutional symptoms and cytopenias. The discovery of the JAK2 V617F mutation in the majority of MF patients has been followed by significant progress in drug development for MF. Areas covered: In this article, we review advances in the understanding of the underlying disease biology, prognostic assessment and therapeutic modalities for MF. We provide clinical trial evidence behind using the JAK2 inhibitor ruxolitinib, erythropoiesis stimulating agents, androgens, immunomodulatory drugs, interferon, cytoreductive drugs and hypomethylating agents in MF...
April 11, 2017: Expert Review of Hematology
https://www.readbyqxmd.com/read/28387022/systemic-iron-homeostasis-and-erythropoiesis
#4
REVIEW
George Papanikolaou, Kostas Pantopoulos
Iron is an essential nutrient that is potentially toxic due to its redox reactivity. Insufficient iron supply to erythroid cells, the major iron consumers in the body, leads to various forms of anemia. On the other hand, iron overload (hemochromatosis) is associated with tissue damage and diseases of liver, pancreas, and heart. Physiological iron balance is tightly controlled at the cellular and systemic level by iron regulatory proteins (IRP1, IRP2) and the iron regulatory hormone hepcidin, respectively. Underlying mechanisms often intersect to achieve optimal iron utilization, to control immune responses, and to prevent iron toxicity...
April 6, 2017: IUBMB Life
https://www.readbyqxmd.com/read/28371161/ferric-pyrophosphate-citrate-as-an-iron-replacement-agent-for-patients-receiving-hemodialysis
#5
Steven Fishbane, Hitesh H Shah
Treatment of anemia remains an integral component in the care of patients with end stage kidney disease receiving dialysis. Currently, both erythropoiesis stimulating agents and iron replacement agents remain important anemia management strategies for patients undergoing hemodialysis (HD). Ferric pyrophosphate citrate (FPC) was approved by the U.S. Food and Drug Administration in January 2015 as an iron replacement product in adult patients receiving long-term maintenance HD. FPC is administered to patients on HD through the dialysate...
April 3, 2017: Hemodialysis International
https://www.readbyqxmd.com/read/28328181/role-of-hepcidin-ferroportin-axis-in-the-pathophysiology-diagnosis-and-treatment-in-anemia-of-chronic-inflammation
#6
Arielle L Langer, Yelena Z Ginzburg
Anemia of chronic inflammation (ACI) is a frequently diagnosed anemia and portends an independently increased morbidity and poor outcome associated with multiple underlying diseases. The pathophysiology of ACI is multifactorial, resulting from the effects of inflammatory cytokines which both directly and indirectly suppress erythropoiesis. Recent advances in molecular understanding of iron metabolism provide strong evidence that immune mediators, such as IL-6, lead to hepcidin-induced hypoferremia, iron sequestration, and decreased iron availability for erythropoiesis...
March 22, 2017: Hemodialysis International
https://www.readbyqxmd.com/read/28328097/markers-of-iron-status-in-chronic-kidney-disease
#7
Adam E Gaweda
Anemia is one of the main comorbidities related to chronic kidney disease (CKD). Until the advent of erythropoiesis stimulating agents (ESA), endogenous erythropoietin deficiency has been thought to be the main culprit of anemia in CKD patients. The use of ESAs has shed new light on the physiology of CKD anemia, where iron homeostasis plays an increasingly important role. Disorders of iron homeostasis occurring in CKD turn the anemia management in those patients into a complex multifactorial therapeutic task, where ESA and Iron dose must be properly balanced to achieve the desired outcome without exposing the patients to the risk of serious adverse events...
March 22, 2017: Hemodialysis International
https://www.readbyqxmd.com/read/28321324/choosing-wisely-the-canadian-society-of-nephrology-s-list-of-5-items-physicians-and-patients-should-question
#8
Emilie Chan, Brenda Hemmelgarn, Scott Klarenbach, Braden Manns, Reem Mustafa, Gihad Nesrallah, Rory McQuillan
PURPOSE OF REVIEW: The purpose of this review is to contribute to the Choosing Wisely Canada campaign and develop a list of 5 items for nephrology health care professionals and patients to re-evaluate based on evidence that they are overused or misused. SOURCES OF INFORMATION: A working group was formed from the Canadian Society of Nephrology (CSN) Clinical Practice Guidelines Committee. This working group sequentially used a multistage Delphi method, a survey of CSN members, a modified Delphi process, and a comprehensive literature review to determine 10 candidate items representing potentially ineffective care in nephrology...
2017: Canadian Journal of Kidney Health and Disease
https://www.readbyqxmd.com/read/28321079/shewanella-algae-bacteremia-in-an-end-stage-renal-disease-patient-a-case-report-and-review-of-the-literature
#9
Tomoaki Takata, Hiroki Chikumi, Shota Morishita, Shintaro Hamada, Shotaro Hoi, Takuji Iyama, Takeaki Fukui, Tomomitsu Matono, Satoko Fukuda, Chishio Munemura, Hajime Isomoto
A 71-year-old man was admitted because of nausea and abdominal pain. He was receiving an erythropoiesis-stimulating agent for anemia and dysregulated iron metabolism due to stage G5 chronic kidney disease. He had a history of raw fish intake and was diagnosed with infectious enterocolitis, which worsened and led to septic shock. Shewanella putrefaciens grew in the blood culture, but Shewanella algae was identified in a 16S rRNA gene sequence analysis. We herein report a case of S. algae bacteremia believed to have been transmitted orally...
2017: Internal Medicine
https://www.readbyqxmd.com/read/28302014/role-of-hepcidin-25-in-chronic-kidney-disease-anemia-and-beyond
#10
Norishi Ueda, Kazuya Takasawa
Iron is an essential element for all living organisms, but produces toxic oxidants. Thus, iron homeostasis is tightly regulated in mammals. Hepcidin-25 (hepcidin) has emerged as a molecule that regulates iron metabolism. Binding of hepcidin to its receptor, ferroportin, inhibits intestinal iron absorption and iron efflux from hepatocytes and macrophages. Decreased hepcidin enhances iron absorption and efflux. Hepcidin could be predictive of iron status and the response to iron supplementation or erythropoietin-stimulating agents...
March 16, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28299673/roles-of-runx-in-hypoxia-induced-responses-and-angiogenesis
#11
Sun Hee Lee, Sarala Manandhar, You Mie Lee
During the past two decades, Runt domain transcription factors (RUNX1, 2, and 3) have been investigated in regard to their function, structural elements, genetic variants, and roles in normal development and pathological conditions. The Runt family proteins are evolutionarily conserved from Drosophila to mammals, emphasizing their physiological importance. A hypoxic microenvironment caused by insufficient blood supply is frequently observed in developing organs, growing tumors, and tissues that become ischemic due to impairment or blockage of blood vessels...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28294512/hfe-mutations-and-iron-in-hemodialysis-patients
#12
Luca Valenti, Serena Pelusi
INTRODUCTION: in chronic hemodialysis patients, a disruption in iron metabolism ranging from absolute to functional deficiency, with compartmentalization of this metal into macrophages, is often observed. Chronic inflammation indeed often causes an upregulation of the iron hormone hepcidin, thereby reducing iron absorption and availability to the erythron. METHODS: we systematically reviewed the literature on the role of genetic risk factors on iron metabolism in hemodialysis...
March 15, 2017: Hemodialysis International
https://www.readbyqxmd.com/read/28293406/%C3%AE-thalassemia-distribution-in-the-old-world-an-ancient-disease-seen-from-a-historical-standpoint
#13
REVIEW
Vincenzo De Sanctis, Christos Kattamis, Duran Canatan, Ashraf T Soliman, Heba Elsedfy, Mehran Karimi, Shahina Daar, Yasser Wali, Mohamed Yassin, Nada Soliman, Praveen Sobti, Soad Al Jaouni, Mohamed El Kholy, Bernadette Fiscina, Michael Angastiniotis
BACKGROUND: Haemoglobinopathies constitute the commonest recessive monogenic disorders worldwide, and the treatment of affected individuals presents a substantial global disease burden. β-thalassaemia is characterised by the reduced synthesis (β(+)) or absence (β(o)) of the β-globin chains in the HbA molecule, resulting in accumulation of excess unbound α-globin chains that precipitate in erythroid precursors in the bone marrow and in the mature erythrocytes, leading to ineffective erythropoiesis and peripheral haemolysis...
2017: Mediterranean Journal of Hematology and Infectious Diseases
https://www.readbyqxmd.com/read/28277851/management-of-lower-risk-myelodysplastic-syndromes-without-del5q-current-approach-and-future-trends
#14
Maximilian Stahl, Amer M Zeidan
Myelodysplastic syndromes (MDS) are characterized by progressive bone marrow failure manifesting as blood cytopenia and a variable risk of progression into acute myeloid leukemia. MDS is heterogeneous in biology and clinical behavior. MDS is generally divided into lower-risk (LR) or higher-risk (HR) MDS. Goals of care in HR-MDS is changing the natural history of the disease, whereas in LR-MDS it is symptom control and quality of life. Areas covered: We review the epidemiology, tools of risk assessment, and the available therapeutic modalities for LR-MDS...
February 21, 2017: Expert Review of Hematology
https://www.readbyqxmd.com/read/28251312/-pumping-iron-how-macrophages-handle-iron-at-the-systemic-microenvironmental-and-cellular-levels
#15
REVIEW
Manfred Nairz, Igor Theurl, Filip K Swirski, Guenter Weiss
Macrophages reside in virtually every organ. First arising during embryogenesis, macrophages replenish themselves in the adult through a combination of self-renewal and influx of bone marrow-derived monocytes. As large phagocytic cells, macrophages participate in innate immunity while contributing to tissue-specific homeostatic functions. Among the key metabolic tasks are senescent red blood cell recycling, free heme detoxification, and provision of iron for de novo hemoglobin synthesis. While this systemic mechanism involves the shuttling of iron between spleen, liver, and bone marrow through the concerted function of defined macrophage populations, similar circuits appear to exist within the microenvironment of other organs...
April 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/28242135/hypoxia-inducible-factor-prolyl-hydroxylase-inhibitors-a%C3%A2-potential-new-treatment-for-anemia-in-patients-with-ckd
#16
REVIEW
Nupur Gupta, Jay B Wish
Erythropoiesis-stimulating agents (ESAs) increase hemoglobin levels, reduce transfusion requirements, and have been the standard of treatment for anemia in patients with chronic kidney disease (CKD) since 1989. Many safety concerns have emerged regarding the use of ESAs, including an increased occurrence of cardiovascular events and vascular access thrombosis. Hypoxia-inducible factor (HIF) prolyl hydroxylase (PH) enzyme inhibitors are a new class of agents for the treatment of anemia in CKD. These agents work by stabilizing the HIF complex and stimulating endogenous erythropoietin production even in patients with end-stage kidney disease...
February 24, 2017: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/28230720/role-of-vitamin-a-retinoic-acid-in-regulation-of-embryonic-and-adult-hematopoiesis
#17
REVIEW
Ana Cañete, Elena Cano, Ramón Muñoz-Chápuli, Rita Carmona
Vitamin A is an essential micronutrient throughout life. Its physiologically active metabolite retinoic acid (RA), acting through nuclear retinoic acid receptors (RARs), is a potent regulator of patterning during embryonic development, as well as being necessary for adult tissue homeostasis. Vitamin A deficiency during pregnancy increases risk of maternal night blindness and anemia and may be a cause of congenital malformations. Childhood Vitamin A deficiency can cause xerophthalmia, lower resistance to infection and increased risk of mortality...
February 20, 2017: Nutrients
https://www.readbyqxmd.com/read/28223232/the-versatility-and-paradox-of-gdf-11
#18
REVIEW
A Jamaiyar, W Wan, D M Janota, M K Enrick, W M Chilian, L Yin
In addition to its roles in embryonic development, Growth and Differentiation Factor 11 (GDF 11) has recently drawn much interest about its roles in other processes, such as aging. GDF 11 has been shown to play pivotal roles in the rescue of the proliferative and regenerative capabilities of skeletal muscle, neural stem cells and cardiomyocytes. We would be remiss not to point that some controversy exists regarding the role of GDF 11 in biological processes and whether it will serve as a therapeutic agent. The latest studies have shown that the level of circulating GDF 11 correlates with the outcomes of patients with cardiovascular diseases, cancer and uremia...
February 14, 2017: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28212192/genetic-control-of-erythropoiesis
#19
Laxminath Tumburu, Swee Lay Thein
PURPOSE OF REVIEW: The discovery of several genetic variants associated with erythroid traits and subsequent elucidation of their functional mechanisms are exemplars of the power of the new genetic and genomic technology. The present review highlights findings from recent genetic studies related to the control of erythropoiesis and dyserythropoiesis, and fetal hemoglobin, an erythroid-related trait. RECENT FINDINGS: Identification of the genetic modulators of erythropoiesis involved two approaches: genome-wide association studies (GWASs) using single nucleotide polymorphism (SNP) arrays that revealed the common genetic variants associated with erythroid phenotypes (hemoglobin, red cell count, MCV, MCH) and fetal hemoglobin; and massive parallel sequencing such as whole genome sequencing (WGS) and whole exome sequencing (WES) that led to the discovery of the rarer variants (GFI1B, SBDS, RPS19, PKLR, EPO, EPOR, KLF1, GATA1)...
May 2017: Current Opinion in Hematology
https://www.readbyqxmd.com/read/28210260/from-the-cradle-to-the-grave-the-role-of-macrophages-in-erythropoiesis-and-erythrophagocytosis
#20
REVIEW
Thomas R L Klei, Sanne M Meinderts, Timo K van den Berg, Robin van Bruggen
Erythropoiesis is a highly regulated process where sequential events ensure the proper differentiation of hematopoietic stem cells into, ultimately, red blood cells (RBCs). Macrophages in the bone marrow play an important role in hematopoiesis by providing signals that induce differentiation and proliferation of the earliest committed erythroid progenitors. Subsequent differentiation toward the erythroblast stage is accompanied by the formation of so-called erythroblastic islands where a central macrophage provides further cues to induce erythroblast differentiation, expansion, and hemoglobinization...
2017: Frontiers in Immunology
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