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Hemopexin

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https://www.readbyqxmd.com/read/29750899/bmp-2-enhances-the-migration-and-proliferation-of-hypoxia-induced-vsmcs-via-actin-cytoskeleton-cd44-and-matrix-metalloproteinase-linkage
#1
Min Yang, Zhiqin Fan, Fei Wang, Zhi-Hua Tian, Bo Ma, Bing Dong, Zhongwu Li, Ming Zhang, Wei Zhao
The persistent proliferation of hypoxia-induced vascular smooth muscle cells (VSMCs) in the arterial wall underlie the development of atherosclerosis. However, the mechanism that regulates the behavior of VSMCs, which involve in actin aggregation, and impedes their migration is still elusive. Here, we report that bone morphogenetic protein 2 (BMP-2) leads to enrichment of CD44 and F-actin stress fiber and secretion of matrix metalloproteinases-2 (MMP-2) during hypoxia in vitro and following artificial hypoxia-induced atherosclerosis exacerbation in vivo...
May 8, 2018: Experimental Cell Research
https://www.readbyqxmd.com/read/29742788/-the-relevance-of-hemolysis-in-anesthesia-and-intensive-care-medicine
#2
Jan A Graw, David M Baron, Roland C E Francis
Hemolysis leads to an increase of circulating intravascular cell-free hemoglobin. Increased plasma concentrations of cell-free hemoglobin are relevant in critically ill patients because cell-free hemoglobin causes vasoconstriction by depletion of endothelial nitric oxide, oxidative stress, and inflammation. Furthermore, cell-free hemoglobin contributes to tissue injuries such as renal failure and intestinal mucosa damage after cardiac surgery. High concentrations of cell-free hemoglobin are associated with an increased mortality in patients with sepsis...
April 2018: Anästhesiologie, Intensivmedizin, Notfallmedizin, Schmerztherapie: AINS
https://www.readbyqxmd.com/read/29742229/hemoglobin-metabolism-by-products-are-associated-with-an-inflammatory-response-in-patients-with-hemorrhagic-stroke
#3
Cássia Righy, Ricardo Turon, Gabriel de Freitas, André Miguel Japiassú, Hugo Caire de Castro Faria Neto, Marcelo Bozza, Marcus F Oliveira, Fernando A Bozza
OBJECTIVE: To evaluate the relationships of brain iron and heme with the inflammatory response of the systemic and central nervous systems and to investigate the role of defensive systems against the toxicity of iron and heme in the central nervous system. METHODS: We assessed a prospective cohort of patients presenting with intracerebral and subarachnoid hemorrhage. We assayed plasma and cerebrospinal fluid samples for the presence of iron, heme, hemopexin, haptoglobin, enolase, S100-β and cytokines for the first three days following hemorrhagic stroke...
March 2018: Revista Brasileira de Terapia Intensiva
https://www.readbyqxmd.com/read/29722341/halogen-inhalation-induced-lung-injury-and-acute-respiratory-distress-syndrome
#4
REVIEW
Ting Zhou, Wei-Feng Song, You Shang, Shang-Long Yao, Sadis Matalon
Objective: Exposure to halogens, such as chlorine or bromine, results in environmental and occupational hazard to the lung and other organs. Chlorine is highly toxic by inhalation, leading to dyspnea, hypoxemia, airway obstruction, pneumonitis, pulmonary edema, and acute respiratory distress syndrome (ARDS). Although bromine is less reactive and oxidative than chlorine, inhalation also results in bronchospasm, airway hyperresponsiveness, ARDS, and even death. Both halogens have been shown to damage the systemic circulation and result in cardiac injury as well...
May 20, 2018: Chinese Medical Journal
https://www.readbyqxmd.com/read/29694434/haptoglobin-and-hemopexin-inhibit-vaso-occlusion-and-inflammation-in-murine-sickle-cell-disease-role-of-heme-oxygenase-1-induction
#5
John D Belcher, Chunsheng Chen, Julia Nguyen, Fuad Abdulla, Ping Zhang, Hao Nguyen, Phong Nguyen, Trevor Killeen, Sylvia M Miescher, Nathan Brinkman, Karl A Nath, Clifford J Steer, Gregory M Vercellotti
During hemolysis, hemoglobin and heme released from red blood cells promote oxidative stress, inflammation and thrombosis. Plasma haptoglobin and hemopexin scavenge free hemoglobin and heme, respectively, but can be depleted in hemolytic states. Haptoglobin and hemopexin supplementation protect tissues, including the vasculature, liver and kidneys. It is widely assumed that these protective effects are due primarily to hemoglobin and heme clearance from the vasculature. However, this simple assumption does not account for the consequent cytoprotective adaptation seen in cells and organs...
2018: PloS One
https://www.readbyqxmd.com/read/29676173/biomolecular-basis-of-matrix-metallo-proteinase-9-activity
#6
Rayala Swetha, Chandrim Gayen, Devendra Kumar, Tryambak Deo Singh, Gyan Modi, Sushil Kumar Singh
Matrix metalloproteinases (MMPs) are structurally related endopeptidases. They are also known as metzincins due to their interaction with zinc ion of the conserved methionine (Met) at the active site. MMPs play an important role in physiological and signaling processes of wound healing, bone resorption and angiogenesis. The structure of MMPs consists of signal peptide, propeptide, catalytic domain, hinge region and hemopexin-like domain. MMP-9 shares high structural and functional similarities with MMP-2, therefore designing selective MMP-9 inhibitors (MMPIs) is challenging...
April 20, 2018: Future Medicinal Chemistry
https://www.readbyqxmd.com/read/29643184/tracking-the-cartoon-mouse-phenotype-hemopexin-domain-dependent-regulation-of-mt1-mmp-pericellular-collagenolytic-activity
#7
Moustafa Sakr, Xiao-Yan Li, Farideh Sabeh, Tamar Y Feinberg, John J G Tesmer, Yi Tang, Stephen J Weiss
Following ENU mutagenesis, a phenodeviant line was generated, termed the 'Cartoon mouse', that exhibits profound defects in growth and development. Cartoon mice harbor a single S466P point mutation in the MT1-MMP hemopexin domain, a 200 amino acid segment that is thought to play a critical role in regulating MT1-MMP collagenolytic activity. Herein, we demonstrate that the MT1-MMPS466P mutation replicates the phenotypic status of Mt1-mmp-null animals as well as the functional characteristics of MT1-MMP-/- cells...
April 11, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29611101/the-compensatory-immune-regulatory-reflex-system-cirs-in-depression-and-bipolar-disorder
#8
REVIEW
Michael Maes, Andre F Carvalho
Here, we review a novel concept namely the compensatory immune-regulatory reflex system (CIRS) as applied to the pathophysiology of major depressive disorder (MDD) and bipolar disorder (BD). There is evidence that a substantial subset of individuals with MDD and BD exhibit an activation of the immune-inflammatory response system (IRS), as indicated by an increased production of macrophagic M1 and T helper (Th)-1 pro-inflammatory cytokines, interleukin (IL)-6 trans-signaling, positive acute phase proteins (APPs), and complement factors...
April 2, 2018: Molecular Neurobiology
https://www.readbyqxmd.com/read/29561947/hemoglobin-metabolism-by-products-are-associated-with-an-inflammatory-response-in-patients-with-hemorrhagic-stroke
#9
Cássia Righy, Ricardo Turon, Gabriel de Freitas, André Miguel Japiassú, Hugo Caire de Castro Faria Neto, Marcelo Bozza, Marcus F Oliveira, Fernando A Bozza
OBJECTIVE: To evaluate the relationships of brain iron and heme with the inflammatory response of the systemic and central nervous systems and to investigate the role of defensive systems against the toxicity of iron and heme in the central nervous system. METHODS: We assessed a prospective cohort of patients presenting with intracerebral and subarachnoid hemorrhage. We assayed plasma and cerebrospinal fluid samples for the presence of iron, heme, hemopexin, haptoglobin, enolase, S100-β and cytokines for the first three days following hemorrhagic stroke...
March 15, 2018: Revista Brasileira de Terapia Intensiva
https://www.readbyqxmd.com/read/29545789/characterization-of-renal-injury-and-inflammation-in-an-experimental-model-of-intravascular-hemolysis
#10
Nicolas S Merle, Anne Grunenwald, Marie-Lucile Figueres, Sophie Chauvet, Marie Daugan, Samantha Knockaert, Tania Robe-Rybkine, Remi Noe, Olivia May, Marie Frimat, Nathan Brinkman, Thomas Gentinetta, Sylvia Miescher, Pascal Houillier, Veronique Legros, Florence Gonnet, Olivier P Blanc-Brude, Marion Rabant, Regis Daniel, Jordan D Dimitrov, Lubka T Roumenina
Intravascular erythrocyte destruction, accompanied by the release of pro-oxidative and pro-inflammatory components hemoglobin and heme, is a common event in the pathogenesis of numerous diseases with heterogeneous etiology and clinical features. A frequent adverse effect related to massive hemolysis is the renal injury and inflammation. Nevertheless, it is still unclear whether heme--a danger-associated molecular pattern--and ligand for TLR4 or upstream hemolysis-derived products are responsible for these effects...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29542267/identification-of-warm-temperature-acclimation-associated-65-kda-protein-2-in-kumgang-fat-minnow-rhynchocypris-kumgangensis
#11
Gibeom Kwon, Sungho Ghil
Warm temperature acclimation-associated 65-kDa protein (Wap65) is known to respond to elevated water temperatures and the corresponding gene from several fish species has been cloned. Expression of Wap65 gene is induced by various physiological stresses, such as increase in water temperature, immune response and heavy metal exposure. Two isolated Wap65 genes, Wap65-1 and Wap65-2, display distinct tissue distribution and physiological functions despite high sequence homology. In a previous study, we identified the Wap65-1 gene (kmWap65-1) from Kumgang fat minnow, Rhynchocypris kumgangensis, a small freshwater fish endemic to Korea...
March 15, 2018: Journal of Experimental Zoology. Part A, Ecological and Integrative Physiology
https://www.readbyqxmd.com/read/29530745/the-hemoglobin-degradation-pathway-in-patients-with-preeclampsia-fetal-hemoglobin-heme-heme-oxygenase-1-and-hemopexin-potential-diagnostic-biomarkers
#12
Ulrik Dolberg Anderson, Maya Jälmby, Marijke M Faas, Stefan R Hansson
OBJECTIVE: The aim of this study was to investigate how maternal cell-free fetal hemoglobin and heme impact the scavenger enzyme systems Hemopexin and Heme Oxygenase-1 in patients with preeclampsia (PE). The secondary aims were to evaluate these proteins as biomarkers for severity of the clinical manifestation i.e. hypertension, in early- and late onset PE. MATERIAL AND METHODS: Plasma samples taken within the last 24 h before delivery from 135 patients were analyzed, 89 PE and 46 normal pregnancies...
February 15, 2018: Pregnancy Hypertension
https://www.readbyqxmd.com/read/29523313/modulation-of-iron-status-biomarkers-in-tuberculosis-diabetes-co-morbidity
#13
Nathella Pavan Kumar, Vaithilingam V Banurekha, Dina Nair, Chandrakumar Dolla, Paul Kumaran, Subash Babu
Tuberculosis (TB) and diabetes mellitus (DM) remain vital disease burdens in developing countries and the dual burden of DM and TB clearly signifies a growing global public health concern. While modulation of iron status biomarkers in TB is well described, very little is known about the association of these markers with TB-DM. To examine the association of circulating iron status biomarkers in TB disease, we examined the systemic levels of ferritin, hepcidin, soluble transferrin receptor (sTfR), transferrin, apotransferrin and hemopexin in pulmonary TB (PTB) individuals with DM (PTB-DM), without DM (PTB) and those with diabetes only (DM)...
January 2018: Tuberculosis
https://www.readbyqxmd.com/read/29522519/role-of-heme-in-lung-bacterial-infection-after-trauma-hemorrhage-and-stored-red-blood-cell-transfusion-a-preclinical-experimental-study
#14
Brant M Wagener, Parker J Hu, Joo-Yeun Oh, Cilina A Evans, Jillian R Richter, Jaideep Honavar, Angela P Brandon, Judy Creighton, Shannon W Stephens, Charity Morgan, Randal O Dull, Marisa B Marques, Jeffrey D Kerby, Jean-Francois Pittet, Rakesh P Patel
BACKGROUND: Trauma is the leading cause of death and disability in patients aged 1-46 y. Severely injured patients experience considerable blood loss and hemorrhagic shock requiring treatment with massive transfusion of red blood cells (RBCs). Preclinical and retrospective human studies in trauma patients have suggested that poorer therapeutic efficacy, increased severity of organ injury, and increased bacterial infection are associated with transfusion of large volumes of stored RBCs, although the mechanisms are not fully understood...
March 2018: PLoS Medicine
https://www.readbyqxmd.com/read/29500821/hemopexin-increases-the-neurotoxicity-of-hemoglobin-when-haptoglobin-is-absent
#15
Jing Chen-Roetling, Sheng-Kai Ma, Yang Cao, Aishwarya Shah, Raymond F Regan
Hemopexin (Hpx) binds heme with extraordinary affinity, and after haptoglobin may provide a second line of defense against the toxicity of extracellular hemoglobin (Hb). In this series of experiments, the hypothesis that Hpx protects neurons from Hb neurotoxicity was evaluated in murine primary cultures containing neurons and glial cells. Contrary to hypothesis, Hpx increased neuronal loss due to micromolar concentrations of Hb by 4- to 12-fold, as measured by LDH release assay; conversely, the neurotoxicity of hemin was completely prevented...
March 3, 2018: Journal of Neurochemistry
https://www.readbyqxmd.com/read/29486203/a-method-for-the-extraction-of-the-endogenous-tryptic-peptides-peptidome-from-human-edta-plasma
#16
Jaimie Dufresne, Angelique Florentinus-Mefailoski, Pete Bowden, John G Marshall
The proteins identified from endogenous peptides agreed between serum versus plasma, and tryptic versus non-tryptic peptides, when collected by C18 alone and analyzed by liquid chromatography electrospray ionization and tandem mass spectrometry (LC-ESI-MS/MS) including amyloids, apolipoproteins, haptoglobin, complements, fibrinogens, hemopexin, antitrypsin and alpha 2 macroglobulin. Precipitation of polypeptides from plasma in 9 vol of 100% organic solvent followed by stepwise extraction of the insoluble pellet with an increasing fraction of water identified thousands of proteins...
May 15, 2018: Analytical Biochemistry
https://www.readbyqxmd.com/read/29458925/is-cupping-blister-harmful-a-proteomical-analysis-of-blister-fluid-induced-by-cupping-therapy-and-scald
#17
Zhidan Liu, Chunlan Chen, Xiaoyan Li, Chuang Zhao, Zunyuan Li, Wei Liang, Yufang Lin
OBJECTIVE: Cupping therapy has a long history in traditional medicine especially in Asian countries. It was controversial whether cupping induced blisters are beneficial to healing effects, and the formation and content in the blisters remain unexplored. We aimed to identify and compare the molecular components of the blister fluid from the cupping therapy and the scalds to explore the necessary of inducing cupping induced blisters. METHODS: Fluid sample of blisters from fifteen patients receiving cupping therapy (Cupping group) and scald burns (Scald group) were collected in this study...
February 2018: Complementary Therapies in Medicine
https://www.readbyqxmd.com/read/29449593/hemopexin-is-required-for-adult-neurogenesis-in-the-subventricular-zone-olfactory-bulb-pathway
#18
Yanling Zhu, Yang Qiu, Mengjia Chen, Yi Zhang, Li Cao, Zhida Su, Yimin Yuan, Aijun Huang, Yinyan Pu, Cheng He
The neural stem cells (NSCs) of the subventricular zone (SVZ) reside within a specialized niche critical for neurogenesis. Hemopexin, a plasma glycoprotein, has been extensively studied as a heme scavenger at the systemic level. However, little is known about its function in the central nervous system, especially in neurogenesis. In the present study, we demonstrate that deletion of hemopexin leads to neurogenic abnormalities in the SVZ/olfactory bulb (OB) pathway. The lateral ventricle is enlarged in hemopexin-deficient mice, and more apoptosis was observed in Dcx+ cells...
February 15, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29447293/the-enzymatic-processing-of-%C3%AE-dystroglycan-by-mmp-2-is-controlled-by-two-anchoring-sites-distinct-from-the-active-site
#19
Magda Gioia, Giovanni Francesco Fasciglione, Diego Sbardella, Francesca Sciandra, MariaLuisa Casella, Serena Camerini, Marco Crescenzi, Alessandro Gori, Umberto Tarantino, Paola Cozza, Andrea Brancaccio, Massimo Coletta, Manuela Bozzi
Dystroglycan (DG) is a membrane receptor, belonging to the dystrophin-glycoprotein complex (DGC) and formed by two subunits, α-dystroglycan (α-DG) and β-dystroglycan (β -DG). The C-terminal domain of α-DG and the N-terminal extracellular domain of β -DG are connected, providing a link between the extracellular matrix and the cytosol. Under pathological conditions, such as cancer and muscular dystrophies, DG may be the target of metalloproteinases MMP-2 and MMP-9, contributing to disease progression. Previously, we reported that the C-terminal domain α-DG (483-628) domain is particularly susceptible to the catalytic activity of MMP-2; here we show that the α-DG 621-628 region is required to carry out its complete digestion, suggesting that this portion may represent a MMP-2 anchoring site...
2018: PloS One
https://www.readbyqxmd.com/read/29427759/quantitative-analysis-of-core-fucosylation-of-serum-proteins-in-liver-diseases-by-lc-ms-mrm
#20
Junfeng Ma, Miloslav Sanda, Renhuizi Wei, Lihua Zhang, Radoslav Goldman
Aberrant core fucosylation of proteins has been linked to liver diseases. In this study, we carried out multiple reaction monitoring (MRM) quantification of core fucosylated N-glycopeptides of serum proteins partially deglycosylated by a combination of endoglycosidases (endoF1, endoF2, and endoF3). To minimize variability associated with the preparatory steps, the analysis was performed without enrichment of glycopeptides or fractionation of serum besides the nanoRP chromatography. Specifically, we quantified core fucosylation of 22 N-glycopeptides derived from 17 proteins together with protein abundance of these glycoproteins in a cohort of 45 participants (15 disease-free control, 15 fibrosis and 15 cirrhosis patients) using a multiplex nanoUPLC-MS-MRM workflow...
February 7, 2018: Journal of Proteomics
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