Abstract:
:Efficient extracellular hemoglobin (Hb) clearance is essential to prevent oxidative- and nitrosative-mediated toxicity. CD163 belongs to group B of the scavenger receptor cysteine-rich (SRCR) protein family found on the surface of monocytes and macrophages and is responsible for Hb-haptoglobin (Hp) complex uptake. Hb uptake by CD163 was thought to proceed exclusively through an Hp-dependent pathway. However, Hb can interact directly with CD163 via a low affinity binding when Hp is absent. As a result, a two-phase hypothesis of Hb clearance by monocytes/macrophages suggests that Hp-Hb binding to CD163 is the primary mechanism of plasma Hb clearance, while clearance of Hb by direct binding to CD163 is secondary to Hp depletion. The authors have considered the ligand specificity of CD163 in human macrophages and in a heterologous gene expression model to demonstrate that Hb is effectively endocytosed by CD163 in the absence of Hp. Additionally, the authors have considered Hb-based oxygen carriers (HBOCs) administration as a unique situation during which direct CD163 uptake may be relevant as a mechanism of clearance. However, the nature of chemical modifications introduced onto the Hb molecule and/or oxidative changes induced in the protein appear to influence the extent of CD163 interaction and cellular uptake. Here, an overview and novel insights into the role of CD163 in Hb redox inactivation and clearance are provided.
journal_name
Antioxid Redox Signaljournal_title
Antioxidants & redox signalingauthors
Schaer DJ,Alayash AI,Buehler PWdoi
10.1089/ars.2007.1576subject
Has Abstractpub_date
2007-07-01 00:00:00pages
991-9issue
7eissn
1523-0864issn
1557-7716journal_volume
9pub_type
杂志文章,评审abstract:SIGNIFICANCE:Studies of sporadic cases, toxin models, and genetic causes of Parkinson's disease suggest that mitochondrial dysfunction may be an early feature of pathogenesis. RECENT ADVANCES:Compelling evidence of a causal relationship between mitochondrial function and disease was found with the identification of se...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章,评审
doi:10.1089/ars.2011.4019
更新日期:2012-05-01 00:00:00
abstract:SIGNIFICANCE:The thioredoxin (Trx) superfamily proteins, including protein disulfide isomerases (PDI) and Dsb protein family, are major players in oxidative protein folding, which involves native disulfide bond formation. These proteins contain Trx folds with CXXC active sites and fulfill their physiological functions ...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章,评审
doi:10.1089/ars.2014.5849
更新日期:2014-07-20 00:00:00
abstract:SIGNIFICANCE:Store-operated Ca2+ entry (SOCE) is a ubiquitous Ca2+ signaling mechanism triggered by Ca2+ depletion of the endoplasmic reticulum (ER) and by a variety of cellular stresses. Reactive oxygen species (ROS) are often concomitantly produced in response to these stresses, however, the relationship between redo...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章,评审
doi:10.1089/ars.2013.5615
更新日期:2014-08-20 00:00:00
abstract:AIMS:Myocardial ischemia/reperfusion (I/R) is associated with mitochondrial dysfunction and subsequent cardiomyocyte death. The generation of excessive quantities of reactive oxygen species (ROS) and resultant damage to mitochondrial enzymes is considered an important mechanism underlying reperfusion injury. Mitochondr...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章
doi:10.1089/ars.2012.4698
更新日期:2013-11-01 00:00:00
abstract:AIMS:Chronic metabolic impairment and oxidative stress are associated with the pathogenesis of axonal dysfunction in a growing number of neurodegenerative conditions. To investigate the intertwining of both noxious factors, we have chosen the mouse model of adrenoleukodystrophy (X-ALD), which exhibits axonal degenerati...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章
doi:10.1089/ars.2010.3877
更新日期:2011-10-15 00:00:00
abstract::Since the initial report of nitric oxide (NO) activity, enormous progress has been made over the last two decades in the field of NO research. Whereas most physiological responses triggered by moderate concentrations of NO are mediated by soluble guanylate cyclase activation and the subsequent production of cyclic GMP...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章,评审
doi:10.1089/152308602760598972
更新日期:2002-10-01 00:00:00
abstract:AIMS:Pancreatic β-cell chronic lipotoxicity evolves from acute free fatty acid (FA)-mediated oxidative stress, unprotected by antioxidant mechanisms. Since mitochondrial uncoupling protein-2 (UCP2) plays antioxidant and insulin-regulating roles in pancreatic β-cells, we tested our hypothesis, that UCP2-mediated uncoupl...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章
doi:10.1089/ars.2014.6195
更新日期:2015-10-20 00:00:00
abstract::Our aim is to deliver an authoritative and challenging perspective of current concepts in plant redox signaling, focusing particularly on the complex interface between the redox and hormone-signaling pathways that allow precise control of plant growth and defense in response to metabolic triggers and environmental con...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章
doi:10.1089/ars.2013.5278
更新日期:2013-06-01 00:00:00
abstract::The nuclear factor-kappaB (NF-kappaB) is a transcription factor that plays a pivotal role in the induction of genes involved in physiological processes, as well as in the response to inflammation. In this study, we used a selective nonpeptidyl superoxide dismutase mimetic, M40403, to investigate the role of superoxide...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章
doi:10.1089/1523086041361659
更新日期:2004-08-01 00:00:00
abstract::Myocardial infarction triggers an inflammatory cascade that results in healing and replacement of the damaged tissue with scar. Cardiomyocyte necrosis triggers innate immune mechanisms eliciting Toll-like receptor- mediated responses, activating the complement cascade and generating reactive oxygen species. Subsequent...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章,评审
doi:10.1089/ars.2006.8.1907
更新日期:2006-11-01 00:00:00
abstract::Fluid shear stress is intimately linked with vascular oxidative stress and atherosclerosis. We posited that atherogenic oscillatory shear stress (OSS) induced mitochondrial superoxide (mtO2•-) production via NADPH oxidase and c-Jun NH(2)-terminal kinase (JNK-1 and JNK-2) signaling. In bovine aortic endothelial cells, ...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章
doi:10.1089/ars.2010.3645
更新日期:2011-09-01 00:00:00
abstract::Nitric oxide (NO) has been shown to regulate a variety of physiological functions, including vascular tone. The inhibition of NO synthase by N(omega)-nitro-L-arginine methyl ester (L-NAME) has been reported to increase arterial blood pressure. The present studies were undertaken to investigate if the increased blood p...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章
doi:10.1089/152308604322899459
更新日期:2004-04-01 00:00:00
abstract::The 6(th) COSTAM/SFRR (ASEAN/Malaysia) workshop, "Micronutrients, Oxidative Stress, and the Environment," was held from June 29 to July 2 at Holiday Inn Damai Beach Resort in Kuching, Sarawak. Two hundred twenty participants from 17 countries presented recent advances on natural antioxidants in the area of oxidative s...
journal_title:Antioxidants & redox signaling
pub_type:
doi:10.1089/ars.2006.8.2175
更新日期:2006-11-01 00:00:00
abstract::Cyclotides are plant proteins with exceptional stability owing to the presence of a cyclic backbone and three disulfide bonds arranged in a cystine knot motif. Accordingly, they have been proposed as templates to stabilize bioactive epitopes in drug-design applications. The two main subfamilies, referred to as the Möb...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章
doi:10.1089/ars.2008.2295
更新日期:2009-05-01 00:00:00
abstract::Oxidative stress is implicated as one of the major underlying mechanisms behind many acute and chronic diseases, and involved in normal aging. However, the measurement of free radicals or their end products is complicated. Thus, proof of association of free radicals in pathologic conditions has been absent. Isoprostan...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章,评审
doi:10.1089/ars.2007.1956
更新日期:2008-08-01 00:00:00
abstract::Hypoxia-inducible factor (HIF) is a transcriptional activator that promotes death or survival in neurons. The regulators and targets of HIF-1alpha-mediated death remain unclear. We found that prodeath effects of HIF-1 are not attributable to an imbalance in HIF-1alpha and HIF-1beta expression. Rather, the synergistic ...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章
doi:10.1089/ars.2008.2039
更新日期:2008-12-01 00:00:00
abstract:AIMS:The purpose of this study was to investigate differential nicotinamide adenine dinucleotide phosphate, reduced (NADPH) production between radiation-sensitive and -resistant head and neck squamous cell carcinoma (HNSCC) cell lines and whether these differences are predictive of sensitivity to the chemotherapeutic β...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章
doi:10.1089/ars.2017.7048
更新日期:2018-10-01 00:00:00
abstract::The tumor suppressor p53 protects organisms from most types of cancer through multiple mechanisms. The p53 gene encodes a stress-activated transcriptional factor that transcriptionally regulates a large set of genes with versatile functions. These p53-activated genes mitigate consequences of stress regulating cell via...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章,评审
doi:10.1089/ars.2010.3530
更新日期:2011-09-15 00:00:00
abstract::The DNA base excision-repair pathway is responsible for the repair of DNA damage caused by oxidation/alkylation and protects cells against the effects of endogenous and exogenous agents. Removal of the damaged base creates a baseless (AP) site. AP endonuclease1 (Ape1) acts on this site to continue the BER-pathway repa...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章
doi:10.1089/ars.2008.2120
更新日期:2008-11-01 00:00:00
abstract:INTRODUCTION:Glycating stress can occur together with oxidative stress during neurodegeneration and contribute to the pathogenic mechanism. Nerve growth factor (NGF) accumulates in several neurodegenerative diseases. Besides promoting survival, NGF can paradoxically induce cell death by signaling through the p75 neurot...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章
doi:10.1089/ars.2016.6966
更新日期:2018-06-20 00:00:00
abstract::5'-Adenosine monophosphate (AMP)-activated protein kinase (AMPK) is a key sensor of cellular energy status. AMPK signaling regulates energy balance at the cellular, organ, and whole-body level. More recently, it has become apparent that AMPK plays also an important role in long-term decisions that determine cell fate,...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章,评审
doi:10.1089/ars.2010.3544
更新日期:2011-05-15 00:00:00
abstract::Clinical heart failure has been defined for a long time as a clinical syndrome with symptoms and signs including shortness of breath, cyanosis, ascites, and edema. However, in recent years, with the thought of promoting early diagnosis and heart-failure prevention, the concept of heart failure has often been defined s...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章,评审
doi:10.1089/ars.2009.2488
更新日期:2009-08-01 00:00:00
abstract:AIM:Antrodia Camphorate (AC) is a mushroom that is widely used in Asian countries to prevent and treat various diseases, including liver diseases. However, the active ingredients that contribute to the biological functions remain elusive. The purpose of the present study is to test the hepatoprotective effect of Antcin...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章
doi:10.1089/ars.2016.6833
更新日期:2017-02-10 00:00:00
abstract::Reductions in brain glucose metabolism and increased oxidative stress invariably occur in Alzheimer's disease (AD) and thiamine (vitamin B1) deficiency. Both conditions cause irreversible cognitive impairment; their behavioral consequences overlap but are not identical. Thiamine-dependent processes are critical in glu...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章,评审
doi:10.1089/ars.2007.1766
更新日期:2007-10-01 00:00:00
abstract:AIMS:The immune system is critical for protection against infections and cancer, but requires scrupulous regulation to limit self-reactivity and autoimmunity. Our group has utilized a manganese porphyrin catalytic antioxidant (MnTE-2-PyP(5+), MnP) as a potential immunoregulatory therapy for type 1 diabetes. MnP has pre...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章
doi:10.1089/ars.2012.5167
更新日期:2013-12-01 00:00:00
abstract:AIMS:Emerging lines of evidence indicate that oxidants such as hydrogen peroxide exert specific signaling functions during the processing of chronic pain. However, the mechanisms by which oxidants regulate pain processing in vivo remain poorly understood. Here, we investigated whether cyclic guanosine monophosphate (cG...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章
doi:10.1089/ars.2013.5585
更新日期:2014-10-01 00:00:00
abstract:SIGNIFICANCE:Changes in shear stress associated with alterations in blood flow initiate a signaling cascade that modulates the vascular phenotype. Shear stress is "sensed" by the endothelium via a mechanosensitive complex on the endothelial cell (EC) membrane that has been characterized as a "mechanosome" consisting of...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章,评审
doi:10.1089/ars.2013.5624
更新日期:2014-02-20 00:00:00
abstract:SIGNIFICANCE:Abnormal lung development in the perinatal period can result in severe neonatal complications, including persistent pulmonary hypertension (PH) of the newborn and bronchopulmonary dysplasia. Reactive oxygen species (ROS) play a substantive role in the development of PH associated with these diseases. ROS i...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章,评审
doi:10.1089/ars.2013.5785
更新日期:2014-11-01 00:00:00
abstract:SIGNIFICANCE:Selenoprotein K (SelK) is an endoplasmic reticulum (ER) membrane protein, and its expression is sensitive to dietary selenium levels. A recently described role for SelK as a cofactor in catalyzing protein palmitoylation reactions provides an important link between low dietary selenium intake and suboptimal...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章,评审
doi:10.1089/ars.2015.6375
更新日期:2015-10-01 00:00:00
abstract:SIGNIFICANCE:Synaptic degeneration, an early pathological feature in Alzheimer's disease (AD), is closely correlated to impaired cognitive function and memory loss. Recent studies suggest that involvement of amyloid-beta peptide (Aβ) in synaptic mitochondrial alteration underlies these synaptic lesions. Thus, to unders...
journal_title:Antioxidants & redox signaling
pub_type: 杂志文章,评审
doi:10.1089/ars.2011.4277
更新日期:2012-06-15 00:00:00