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Hemopexin

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https://www.readbyqxmd.com/read/28783684/il-22-scavenging-beyond-the-barrier
#1
REVIEW
Sandip K Datta
IL-22-induced hemopexin promotes nutritional immunity by scavenging iron from Citrobacter rodentium during systemic infection.
February 3, 2017: Science Immunology
https://www.readbyqxmd.com/read/28743114/cervical-alpha-actinin-4-is-upregulated-in-women-with-threatened-preterm-labor-and-microbial-invasion-of-the-amniotic-cavity
#2
Teresa Cobo, Montse Palacio, Maribel Grande, Ana B Sánchez-García, Josep M Estanyol, Marta López, Jordi Bosch, Cristina Martí, Eduard Gratacós
OBJECTIVE: To characterize the proteome profile of women with threatened preterm labor (PTL) below 34;0 weeks with and without microbial invasion of the amniotic cavity (MIAC) using mass spectrometry in the amniotic fluid (AF) and Western blot analysis in the cervical mucus and the vaginal fluid. SUBJECTS AND METHODS: In the discovery phase, a case-control study including 8 women with MIAC and 7 without matched for gestational age at sampling was performed. Proteomic profile characterization was done using the LTQ VELOS Orbitrap mass spectrometer in the AF...
July 26, 2017: Fetal Diagnosis and Therapy
https://www.readbyqxmd.com/read/28729288/urinary-extracellular-vesicles-of-podocyte-origin-and-renal-injury-in-preeclampsia
#3
Sarwat I Gilani, Ulrik Dolberg Anderson, Muthuvel Jayachandran, Tracey L Weissgerber, Ladan Zand, Wendy M White, Natasa Milic, Maria Lourdes Gonzalez Suarez, Rangit Reddy Vallapureddy, Åsa Nääv, Lena Erlandsson, John C Lieske, Joseph P Grande, Karl A Nath, Stefan R Hansson, Vesna D Garovic
Renal histologic expression of the podocyte-specific protein, nephrin, but not podocin, is reduced in preeclamptic compared with normotensive pregnancies. We hypothesized that renal expression of podocyte-specific proteins would be reflected in urinary extracellular vesicles (EVs) of podocyte origin and accompanied by increased urinary soluble nephrin levels (nephrinuria) in preeclampsia. We further postulated that podocyte injury and attendant formation of EVs are related mechanistically to cellfree fetal hemoglobin (HbF) in maternal plasma...
July 20, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28683915/collagenolytic-matrix-metalloproteinase-structure-function-relationships-insights-from-molecular-dynamics-studies
#4
Tatyana G Karabencheva-Christova, Christo Z Christov, Gregg B Fields
Several members of the zinc-dependent matrix metalloproteinase (MMP) family catalyze collagen degradation. Experimental data reveal a collaboration between different MMP domains in order to achieve efficient collagenolysis. Molecular dynamics (MD) simulations have been utilized to provide atomistic details of the collagenolytic process. The triple-helical structure of collagen exhibits local regions of flexibility, with modulation of interchain salt bridges and water bridges contributing to accessibility of individual chains by the enzyme...
2017: Advances in Protein Chemistry and Structural Biology
https://www.readbyqxmd.com/read/28681077/direct-analysis-of-site-specific-n-glycopeptides-of-serological-proteins-in-dried-blood-spot-samples
#5
Na Young Choi, Heeyoun Hwang, Eun Sun Ji, Gun Wook Park, Ju Yeon Lee, Hyun Kyoung Lee, Jin Young Kim, Jong Shin Yoo
Dried blood spot (DBS) samples have a number of advantages, especially with respect to ease of collection, transportation, and storage and to reduce biohazard risk. N-glycosylation is a major post-translational modification of proteins in human blood that is related to a variety of biological functions, including metastasis, cell-cell interactions, inflammation, and immunization. Here, we directly analyzed tryptic N-glycopeptides from glycoproteins in DBS samples using liquid chromatography-tandem mass spectrometry (LC-MS/MS) without centrifugation of blood samples, depletion of major proteins, desalting of tryptic peptides, and enrichment of N-glycopeptides...
August 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28680860/host-iron-nutritional-immunity-induced-by-a-live-yersinia-pestis-vaccine-strain-is-associated-with-immediate-protection-against-plague
#6
Ayelet Zauberman, Yaron Vagima, Avital Tidhar, Moshe Aftalion, David Gur, Shahar Rotem, Theodor Chitlaru, Yinon Levy, Emanuelle Mamroud
Prompt and effective elicitation of protective immunity is highly relevant for cases of rapidly deteriorating fatal diseases, such as plague, which is caused by Yersinia pestis. Here, we assessed the potential of a live vaccine to induce rapid protection against this infection. We demonstrated that the Y. pestis EV76 live vaccine protected mice against an immediate lethal challenge, limiting the multiplication of the virulent pathogen and its dissemination into circulation. Ex vivo analysis of Y. pestis growth in serum derived from EV76-immunized mice revealed that an antibacterial activity was produced rapidly...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28652204/evidence-for-a-role-of-nerve-injury-in-painful-intervertebral-disc-degeneration-a-cross-sectional-proteomic-analysis-of-human-cerebrospinal-fluid
#7
Tony K Y Lim, Kathleen M Anderson, Pawan Hari, Marcos Di Falco, Troy E Reihsen, George L Wilcox, Kumar G Belani, Sylvie LaBoissiere, Manuel R Pinto, David S Beebe, Lois J Kehl, Laura S Stone
Intervertebral disc degeneration (DD) is a cause of low back pain (LBP) in some individuals. However, although >30% of adults have DD, LBP only develops in a subset of individuals. To gain insight into the mechanisms underlying nonpainful versus painful DD, human cerebrospinal fluid (CSF) was examined using differential expression shotgun proteomic techniques comparing healthy control participants, subjects with nonpainful DD, and patients with painful DD scheduled for spinal fusion surgery. Eighty-eight proteins were detected, 27 of which were differentially expressed...
June 24, 2017: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/28620062/urine-biomarkers-to-predict-response-to-lupus-nephritis-therapy-in-children-and-young-adults
#8
Hermine I Brunner, Michael R Bennett, Gaurav Gulati, Khalid Abulaban, Marisa S Klein-Gitelman, Stacy P Ardoin, Lori B Tucker, Kelly A Rouster-Stevens, David Witte, Jun Ying, Prasad Devarajan
OBJECTIVE: To delineate urine biomarkers that forecast response to therapy of lupus nephritis (LN). METHODS: Starting from the time of kidney biopsy, patients with childhood-onset systemic lupus erythematosus who were diagnosed with LN were studied serially. Levels of 15 biomarkers were measured in random spot urine samples, including adiponectin, α-1-acid glycoprotein (AGP), ceruloplasmin, hemopexin, hepcidin, kidney injury molecule 1, monocyte chemotactic protein-1, lipocalin-like prostaglandin D synthase (LPGDS), transforming growth factor-β (TGF-β), transferrin, and vitamin D binding protein (VDBP)...
August 2017: Journal of Rheumatology
https://www.readbyqxmd.com/read/28596380/identification-of-oxidative-modifications-of-hemopexin-and-their-predicted-physiological-relevance
#9
Peter Hahl, Rachel Hunt, Edward S Bjes, Andrew Skaff, J Andrew Keightley, Ann Smith
Hemopexin protects against heme toxicity in hemolytic diseases and conditions, sepsis and sickle cell disease. This protection is sustained by heme-hemopexin complexes present in biological fluids that resist oxidative damage during heme-driven inflammation. However, apo-hemopexin is vulnerable to inactivation by reactive nitrogen and oxygen species that covalently modify amino acids. The consequent nitration of amino acids is considered a selective and specific effect reflecting biological events. Using liquid chromatography-tandem mass spectrometry, we discovered low endogenous levels of tyrosine nitration in the peptide YYCFQGNQFLR of human hemopexin, which was similarly nitrated in rabbit and rat hemopexins...
June 8, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28561948/identification-of-fucosylated-fetuin-a-as-a-potential-biomarker-for-cholangiocarcinoma
#10
Lucy Betesh, Mary Ann Comunale, Mengjun Wang, Hongyan Liang, Julie Hafner, Aykan Karabudak, Nasra H Giama, Catherine D Moser, Eiji Miyoshi, Lewis R Roberts, Timothy M Block, Anand Mehta
PURPOSE: Cholangiocarcinoma (CCA) is a malignancy of the bile ducts. The purpose of this discovery study was to identify effective serum markers for surveillance of cholangiocarcinoma. EXPERIMENTAL DESIGN: Using a glycomic method, patients with CCA were determined to have increased levels of alpha-1,3 and alpha-1,6 linked fucosylated glycan. Proteomic analysis of the serum fucosylated proteome identified proteins such as alpha-2-macroglobulin, kininogen, hemopexin, fetuin-A, alpha-1 anti-trypsin, and ceruloplasmin as being hyperfucosylated in HCC...
May 31, 2017: Proteomics. Clinical Applications
https://www.readbyqxmd.com/read/28560284/data-demonstrating-the-anti-oxidant-role-of-hemopexin-in-the-heart
#11
Giada Ingoglia, Can Martin Sag, Nikolai Rex, Lucia De Franceschi, Francesca Vinchi, James Cimino, Sara Petrillo, Stefan Wagner, Klaus Kreitmeier, Lorenzo Silengo, Fiorella Altruda, Lars S Maier, Emilio Hirsch, Alessandra Ghigo, Emanuela Tolosano
The data presented in this article are related to the research article entitled Hemopexin counteracts systolic dysfunction induced by heme-driven oxidative stress (G. Ingoglia, C. M. Sag, N. Rex, L. De Franceschi, F. Vinchi, J. Cimino, S. Petrillo, S. Wagner, K. Kreitmeier, L. Silengo, F. Altruda, L. S. Maier, E. Hirsch, A. Ghigo and E. Tolosano, 2017) [1]. Data show that heme induces reactive oxygen species (ROS) production in primary cardiomyocytes. H9c2 myoblastic cells treated with heme bound to human Hemopexin (Hx) are protected from heme accumulation and oxidative stress...
August 2017: Data in Brief
https://www.readbyqxmd.com/read/28550901/protective-effect-of-hemopexin-on-systemic-inflammation-and-acute-lung-injury-in-an-endotoxemia-model
#12
Jae Yun Jung, Young Ho Kwak, Ikwan Chang, Woon Yong Kwon, Gil Joon Suh, Dongyoul Choi
BACKGROUND: Hemopexin (HPX) has been identified as an anti-inflammatory agent, but its role in endotoxemia is unclear. The purpose of this study was to determine whether HPX suppresses systemic and lung inflammation in a mouse model of endotoxemia. MATERIALS AND METHODS: At 30 min of intraperitoneal administration of lipopolysaccharide (LPS; 10 mg/kg), either distilled water (LPS-only treated animals) or HPX (5 mg/kg) was injected into mice via the tail vein, and the survival rates were analyzed after 36 h...
May 15, 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28502635/identification-of-vitreous-proteins-in-retinopathy-of-prematurity
#13
Koji Sugioka, Akio Saito, Shunji Kusaka, Kazuki Kuniyoshi, Yoshikazu Shimomura
Retinopathy of prematurity (ROP) is a disorder of blood vessels in the retina developed in premature infants and the leading cause of the blindness in children. Proteomic analysis was performed to identify vitreous proteins specific to patients with ROP. Vitreous humor samples were obtained from three patients with ROP and two patients with congenital cataract, the latter included as a control group. The vitreous samples were separated by 2D-PAGE and the proteins running as definitive spots were identified by MALDI-TOF MS spectrometry...
May 11, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28469399/a-novel-biomarker-panel-to-identify-steroid-resistance-in-childhood-idiopathic-nephrotic-syndrome
#14
Michael R Bennett, LaTawnya Pleasant, Christopher Haffner, Qing Ma, Wendy D Haffey, Jun Ying, Michael Wagner, Kenneth D Greis, Prasad Devarajan
Idiopathic nephrotic syndrome (NS) is the most common glomerular disorder of childhood. Response to initial treatment with corticosteroids is an indicator of prognosis, as resistant patients often present more progressive disease. In this cross-sectional pilot study, we set out to discover a panel of noninvasive biomarkers that could distinguish steroid-resistant nephrotic syndrome (SRNS) from steroid-sensitive nephrotic syndrome (SSNS). Information gleaned from such a panel could yield more individualized treatment plans and prevent unnecessary steroid exposure in patients unlikely to respond...
2017: Biomarker Insights
https://www.readbyqxmd.com/read/28444931/study-of-structure-dependent-chromatographic-behavior-of-glycopeptides-using-reversed-phase-nanolc
#15
Petr Kozlik, Radoslav Goldman, Miloslav Sanda
Analysis of glycosylation is challenging due to micro- and macro-heterogeneity of the protein attachment. A combination of LC with MS/MS is one of the most powerful tools for glycopeptide analysis. In this work, we show the effect of various monosaccharide units on the retention time of glycopeptides. Retention behavior of several glycoforms of six peptides obtained from tryptic digest of haptoglobin, hemopexin, and sex hormone-binding globulin was studied on a reversed phase chromatographic column. We observed reduction of the retention time with increasing number of monosaccharide units of glycans attached to the same peptide backbone...
April 26, 2017: Electrophoresis
https://www.readbyqxmd.com/read/28442379/peripheral-membrane-associations-of-matrix-metalloproteinases
#16
REVIEW
Steven R Van Doren, Tara C Marcink, Rama K Koppisetti, Alexander Jurkevich, Yan G Fulcher
Water soluble matrix metalloproteinases (MMPs) have been regarded as diffusing freely in the extracellular matrix. Yet multiple MMPs are also observed at cell surfaces. Their membrane-proximal activities include sheddase activities, collagenolysis, bacterial killing, and intracellular trafficking reaching as far as the nucleus. The catalytic domains of MMP-7 and MMP-12 bind bilayers peripherally, each in two different orientations, by presenting positive charges and a few hydrophobic groups to the surface. Related peripheral membrane associations are predicted for other soluble MMPs...
April 23, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28436274/depletion-of-hdl3-high-density-lipoprotein-and-altered-functionality-of-hdl2-in-blood-from-sickle-cell-patients
#17
Eric Soupene, Sandra K Larkin, Frans A Kuypers
In sickle cell disease (SCD), alterations of cholesterol metabolism is in part related to abnormal levels and activity of plasma proteins such as lecithin cholesterol acyltransferase (LCAT), and apolipoprotein A-I (ApoA-I). In addition, the size distribution of ApoA-I high density lipoproteins (HDL) differs from normal blood. The ratio of the amount of HDL2 particle relative to the smaller higher density pre-β HDL (HDL3) particle was shifted toward HDL2. This lipoprotein imbalance is exacerbated during acute vaso-occlusive episodes (VOE) as the relative levels of HDL3 decrease...
January 1, 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28420988/heme-as-a-target-for-therapeutic-interventions
#18
REVIEW
Stephan Immenschuh, Vijith Vijayan, Sabina Janciauskiene, Faikah Gueler
Heme is a complex of iron and the tetrapyrrole protoporphyrin IX with essential functions in aerobic organisms. Heme is the prosthetic group of hemoproteins such as hemoglobin and myoglobin, which are crucial for reversible oxygen binding and transport. By contrast, high levels of free heme, which may occur in various pathophysiological conditions, are toxic via pro-oxidant, pro-inflammatory and cytotoxic effects. The toxicity of heme plays a major role for the pathogenesis of prototypical hemolytic disorders including sickle cell disease and malaria...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28413025/biochemical-and-biological-attributes-of-matrix-metalloproteinases
#19
REVIEW
Ning Cui, Min Hu, Raouf A Khalil
Matrix metalloproteinases (MMPs) are a family of zinc-dependent endopeptidases that are involved in the degradation of various proteins in the extracellular matrix (ECM). Typically, MMPs have a propeptide sequence, a catalytic metalloproteinase domain with catalytic zinc, a hinge region or linker peptide, and a hemopexin domain. MMPs are commonly classified on the basis of their substrates and the organization of their structural domains into collagenases, gelatinases, stromelysins, matrilysins, membrane-type (MT)-MMPs, and other MMPs...
2017: Progress in Molecular Biology and Translational Science
https://www.readbyqxmd.com/read/28400318/hemopexin-counteracts-systolic-dysfunction-induced-by-heme-driven-oxidative-stress
#20
Giada Ingoglia, Can Martin Sag, Nikolai Rex, Lucia De Franceschi, Francesca Vinchi, James Cimino, Sara Petrillo, Stefan Wagner, Klaus Kreitmeier, Lorenzo Silengo, Fiorella Altruda, Lars S Maier, Emilio Hirsch, Alessandra Ghigo, Emanuela Tolosano
Heart failure is a leading cause of morbidity and mortality in patients affected by different disorders associated to intravascular hemolysis. The leading factor is the presence of pathologic amount of pro-oxidant free heme in the bloodstream, due to the exhaustion of the natural heme scavenger Hemopexin (Hx). Here, we evaluated whether free heme directly affects cardiac function, and tested the therapeutic potential of replenishing serum Hx for increasing serum heme buffering capacity. The effect of heme on cardiac function was assessed in vitro, on primary cardiomyocytes and H9c2 myoblast cell line, and in vivo, in Hx(-/-) mice and in genetic and acquired mouse models of intravascular hemolysis...
April 8, 2017: Free Radical Biology & Medicine
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