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https://www.readbyqxmd.com/read/29138283/frequency-of-and-reasons-for-paroxysmal-nocturnal-haemoglobinuria-screening-in-patients-with-unexplained-anaemia
#1
James T England, Bakul Dalal, Heather A Leitch
Referral to hematology for anemia is common. In paroxysmal nocturnal hemoglobinuria (PNH), cells deficient in the glycosylphosphatidyl inositol (GPI) anchor are lysed by complement. Eculizumab improves overall survival and quality of life while reducing hemolysis, transfusion requirements, and thrombosis. We evaluated the frequency of screening for PNH in patients with unexplained anemia. Key clinical features, laboratory data, and investigations were recorded for patients referred for anemia since 2010, without a specific cause found...
November 14, 2017: Journal of Clinical Pathology
https://www.readbyqxmd.com/read/29133160/the-changes-of-red-blood-cell-viscoelasticity-and-sports-anemia-in-male-24-hr-ultra-marathoners
#2
Che-Hung Liu, Yen-Fang Tseng, Jiun-I Lai, Yin-Quan Chen, Shih-Hao Wang, Wei-Fong Kao, Li-Hua Li, Yu-Hui Chiu, Chorng-Kuang How, Wen-Han Chang
BACKGROUND: In endurance sports, stress, dehydration and release of chemical factors have been associated with red blood cell (RBC) alterations of structure and function, which may contribute to sports anemia, a well-observed phenomenon during long-distance running. Until now, the investigation of the changes of viscoelastic properties of RBC membrane, a decisive factor of RBC deformability to avoid hemolysis, is lacking, especially in an Oriental population. METHODS: nineteen runners were prospectively recruited into our study...
November 10, 2017: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/29130008/a-rare-association-of-autoimmune-hemolytic-anemia-with-gastric-adenocarcinoma
#3
Kavita Agrawal, Flores Alfonso
An 80-year-old male presented with dyspnea on exertion for at least two months. He also complained of progressive dysphagia and weight loss of 35 pounds over the last eight months. Initial blood tests showed hemoglobin of 6.1 g/dl, reticulocytes count of 19.7%, total bilirubin of 3.2 mg/dl, lactate dehydrogenase of 600 U/L, and haptoglobin of less than 8 mg/dl, and direct Coombs test was positive for warm immunoglobulin G. The impression was autoimmune hemolytic anemia (AIHA). The evaluation of dysphagia with esophagogastroduodenoscopy revealed a single irregular 4 cm malignant appearing ulcerated mass at the incisura angularis of the stomach...
2017: Case Reports in Oncological Medicine
https://www.readbyqxmd.com/read/29122274/frequency-and-significance-of-intravascular-hemolysis-before-and-after-transcatheter-aortic-valve-implantation-in-patients-with-severe-aortic-stenosis
#4
Tsung-Yu Ko, Mao-Shin Lin, Lung-Chun Lin, Ying-Ju Liu, Chih-Fan Yeh, Ching-Chang Huang, Ying-Hsien Chen, Yih-Sharng Chen, Hsien-Li Kao
Intravascular hemolysis (IVH) has been identified in patients with surgical prosthetic valves, but few have been reported after transcatheter aortic valve implantation (TAVI). We conducted a prospective analysis of 64 TAVI patients. The hemolysis profiles were collected at baseline and 6 months after TAVI. The echocardiography was performed at baseline and 6 months after TAVI. There are 14 patients (21.9%) with IVH before and 24(37.5%) after TAVI. The serum haptoglobin values before and 6 months after TAVI are 126...
October 10, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/29114966/a-cross-sectional-clinic-based-study-exploring-whether-variants-within-the-glutathione-s-transferase-haptoglobin-and-uridine-5-diphosphoglucuronosyl-transferase-1a1-genes-are-associated-with-inter-individual-phenotypic-variation-in-sickle-cell-anaemia-in-jamaica
#5
Sharon Howell, Kwesi Marshall, Marvin Reid, Norma McFarlane-Anderson, Colin McKenzie
OBJECTIVES: To explore putative associations between specific variants in either the glutathione S-transferase (GST), haptoglobin (HP), or uridine 5'-diphospho-glucuronosyltransferase 1A1 (UGT1A1) genes and clinically important phenotypes in sickle cell anaemia (HbSS). METHODS: Three hundred and seventy-one HbSS participants were recruited from the Sickle Cell Clinic of the Sickle Cell Unit at the University of the West Indies, Kingston, Jamaica. Markers within four GST superfamily genes, the HP gene, and the UGT1A1 gene were analyzed using PCR-based assays...
November 7, 2017: European Journal of Haematology
https://www.readbyqxmd.com/read/29114931/thrombotic-microangiopathy-with-concomitant-gi-agvhd-after-allogeneic-hematopoietic-stem-cell-transplantation-risk-factors-and-outcome
#6
Xiao-Hui Zhang, Xiao Liu, Qin-Ming Wang, Yun He, Xiao-Lu Zhu, Jia-Min Zhang, Wei Han, Huan Chen, Yu-Hong Chen, Feng-Rong Wang, Jing-Zhi Wang, Yuan-Yuan Zhang, Xiao-Dong Mo, Yao Chen, Yu Wang, Hai-Xia Fu, Ying-Jun Chang, Lan-Ping Xu, Kai-Yan Liu, Xiao-Jun Huang
OBJECTIVES: To explore the possible risk factors for the occurrence and mortality of TMA with concomitant aGVHD and to investigate outcomes and treatments of this disorder after allo-HSCT. METHODS: 50 cases diagnosed with TMA with concomitant aGVHD and 150 controls were identified from a cohort composed of 3 992 patients who underwent allo-HSCT from 2008 to 2016. RESULTS: Grade III-IV aGVHD (p=0.000), acute kidney injury (AKI) (p=0.033) and hypertension (p=0...
November 7, 2017: European Journal of Haematology
https://www.readbyqxmd.com/read/29112633/2017-military-supplement-current-challenges-in-the-development-of-acellular-hemoglobin-oxygen-carriers-by-protein-engineering
#7
Andres S Benitez Cardenas, Premila P Samuel, John S Olson
This article reviews the key biochemical mechanisms that govern O2 transport, NO scavenging, and oxidative degradation of acellular hemoglobin and how these ideas have been used to try to develop strategies to engineer safer and more effective hemoglobin-based oxygen carriers (HBOCs). Significant toxicities due to acellular hemoglobin (Hb) have been observed after the administration of HBOCs or after the lysis of red cells, and include: (a) rapid clearance and kidney damage due to dissociation into dimers, haptoglobin binding, and macrophage activation; (b) early O2 release leading to decreased tissue perfusion in capillary beds; (c) interference with endothelial and smooth muscle signaling due to nitric oxide (NO) scavenging; (d) autooxidization of heme iron followed by production of reactive oxygen species; and (e) iron overload symptoms due to hemin loss, globin denaturation, iron accumulation, and further inflammation...
November 6, 2017: Shock
https://www.readbyqxmd.com/read/29109153/structure-function-analyses-reveal-key-features-in-staphylococcus-aureus-isdb-associated-unfolding-of-the-heme-binding-pocket-of-human-hemoglobin
#8
Catherine F M Bowden, Anson C K Chan, Emily J W Li, Angelé L Arrieta, Lindsay D Eltis, Michael E P Murphy
IsdB is a receptor on the surface of the bacterial pathogen Staphylococcus aureus that extracts heme from hemoglobin (Hb) to enable growth on Hb as a sole iron source. IsdB is critically important both for in vitro growth on Hb and in infection models and is also highly upregulated in blood, serum, and tissue infection models, indicating a key role of this receptor in bacterial virulence. However, structural information for IsdB is limited. We present here a crystal structure of a complex between human Hb and IsdB...
November 6, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29108039/effect-of-band-and-knife-castration-of-beef-calves-on-welfare-indicators-of-pain-at-three-relevant-industry-ages-ii-chronic-pain
#9
S Marti, D M Meléndez, E A Pajor, D Moya, C E M Heuston, D Gellatly, E D Janzen, K S Schwartzkopf-Genswein
Three experiments were conducted to evaluate the effects of band and knife castration on behavioral and physiological indicators of chronic pain in beef calves at 3 different ages (36 calves/age group): 1 wk of age (Exp. 1, 4 ± 1.1 d of age, 43 ± 1.1 kg BW), 2 mo of age (Exp. 2, 63 ± 2.3 d of age, 92 ± 1.7 kg BW), and 4 mo of age (Exp. 3, 125 ± 4.6 d of age, 160 ± 3.4 kg BW). In each experiment calves were randomly assigned to either sham (CT), band (BA) or knife (KN) castration. Experiments 1, 2, and 3 ended when the testicles of banded calves had sloughed off (68, 49, and 42 d, respectively)...
October 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/29104730/haptoglobin-genotype-and-outcome-after-subarachnoid-haemorrhage-new-insights-from-a-meta-analysis
#10
Ben Gaastra, James Glazier, Diederik Bulters, Ian Galea
Haptoglobin (Hp) is a plasma protein involved in clearing extracellular haemoglobin and regulating inflammation; it exists as two genetic variants (Hp1 and Hp2). In a meta-analysis of six published studies, we confirm that Hp genotype affects short-term outcome (cerebral vasospasm and/or delayed cerebral ischemia) after subarachnoid haemorrhage (SAH) but not long-term outcome (Glasgow Outcome Score and modified Rankin Scale between one and three months). A closer examination of the heterozygous group revealed that the short-term outcome of Hp2-1 individuals clustered with that of Hp1-1 and not Hp2-2, suggesting that the presence of one Hp1 allele was sufficient to confer protection...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29103717/effects-of-supplementing-yeast-culture-to-diets-differing-in-starch-content-on-performance-and-feeding-behavior-of-dairy-cows
#11
A L G Dias, J A Freitas, B Micai, R A Azevedo, L F Greco, J E P Santos
The objectives were to evaluate the effects of a culture of Saccharomyces cerevisiae (YC) on lactation performance of cows fed diets differing in starch content. Fifty-six Holstein cows at 42 d postpartum were blocked by parity and milk production and randomly assigned to 1 of 4 treatments, low starch (23% diet DM) and no YC (LS-control), low starch and 15 g/d of YC (LS-YC), high starch (29% diet DM) and no YC (HS-control), and high starch and 15 g/d of YC (HS-YC). The experiment lasted 14 wk. Blood was sampled twice weekly during the first 5 wk in the experiment...
November 2, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29103715/effect-of-supplemental-yeast-culture-and-dietary-starch-content-on-rumen-fermentation-and-digestion-in-dairy-cows
#12
A L G Dias, J A Freitas, B Micai, R A Azevedo, L F Greco, J E P Santos
The objectives of this experiment were to evaluate the effect of feeding a culture of Saccharomyces cerevisiae on rumen metabolism and digestibility when cows are fed diets varying in starch content. Four lactating Holstein cows were assigned to a 4 × 4 Latin square design with a 2 × 2 factorial arrangement of treatments. Treatments were low starch (LS; 23% of diet DM) and no yeast culture (YC; LS-control), LS and 15 g of YC/d (LS-YC), high starch (HS; 29% of diet DM) and no YC (HS-control), and HS and 15 g of YC/d (HS-YC)...
November 2, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29103714/ethyl-cellulose-rumen-protected-methionine-alleviates-inflammation-and-oxidative-stress-and-improves-neutrophil-function-during-the-periparturient-period-and-early-lactation-in-holstein-dairy-cows
#13
F Batistel, J M Arroyo, C I M Garces, E Trevisi, C Parys, M A Ballou, F C Cardoso, J J Loor
The periparturient period is the most critical phase in the productive cycle of dairy cows and is characterized by impairment of the immune system. Our objective was to evaluate the effect of feeding ethyl-cellulose rumen-protected methionine (RPM) starting at d -28 from expected parturition through 60 d in milk on biomarkers of inflammation, oxidative stress, and liver function as well as leukocyte function. Sixty multiparous Holstein cows were used in a block design and assigned to either a control or the control plus ethyl-cellulose RPM (Mepron, Evonik Nutrition & Care GmbH)...
November 2, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29102802/psychosocial-stress-sensitizes-neuroendocrine-and-inflammatory-responses-to-escherichia-coli-challenge-in-domestic-piglets
#14
Margret Tuchscherer, Birger Puppe, Armin Tuchscherer, Ellen Kanitz
Exposure to psychosocial stress can have a profound impact on immune reactivity and health mediated by hypothalamic-pituitary-adrenal (HPA) axis activation. However, current knowledge regarding the mechanisms involved in cross-sensitization between stress and the immune system is limited. Here, we investigated the effects of a single social isolation followed by repeated oral Escherichia coli (E. coli) applications on cortisol, tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), haptoglobin and C-reactive protein (CRP) concentrations in the blood; on clinical signs of disease; and on mRNA expression of the glucocorticoid receptor (GR), mineralocorticoid receptor (MR), 11β-hydroxysteroid dehydrogenase 1 and 2 (11β-HSD1 and 11β-HSD2), TNF-α and IL-6 in the hypothalamus, prefrontal cortex (PFC) and spleen of 7-, 21- and 35-day-old piglets...
November 1, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/29102139/short-communication-supplementation-of-colostrum-and-milk-with-5-hydroxy-l-tryptophan-affects-immune-factors-but-not-growth-performance-in-newborn-calves
#15
Lorenzo E Hernández-Castellano, Ranya Özçelik, Laura L Hernandez, Rupert M Bruckmaier
In ruminants, colostrum is the main source of immunoglobulins for the newborn animal, conferring immune protection until the immune system becomes active and able to synthesize its own immunoglobulins. Serotonin (5-HT), a biogenic amine derived from tryptophan, has stimulatory effects on many physiological processes, including components of the innate (mastocytes, eosinophils, and natural killer cells) and adaptive (T and B lymphocytes) immune systems. Based on the known effects of 5-HT on the immune system, we hypothesized that increased concentrations of 5-HT, through administration of its precursor 5-hydroxy-l-tryptophan (5-HTP), may positively affect development of the calf's immune system and therefore support health and growth performance during the first weeks of life...
October 25, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29090352/oxidation-reduction-potential-orp-is-predictive-of-complications-following-pediatric-cardiac-surgery
#16
Amy E Schmidt, Emily Gore, Kelly F Henrichs, Grace Conley, Charles Dorsey, Kimberly B Bjugstad, Majed A Refaai, Neil Blumberg, Jill M Cholette
Oxidation reduction potential (ORP) or Redox is the ratio of activity between oxidizers and reducers. Oxidative stress (OS) can cause cellular injury and death, and is important in the regulation of immune response to injury or disease. In the present study, we investigated changes in the redox system as a function of cardiopulmonary bypass (CPB) in pediatric patients. 664 plasma samples were collected from 162 pediatric patients having cardiac surgery of various CPB times. Lower ORP values at 12 h post-CPB were associated with poor survival rate (mean ± SD 167 ± 20 vs...
October 31, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/29080879/-changes-in-laboratory-parameters-of-peripheral-blood-reflect-cell-and-protein-content-of-the-immune-system-in-bone-resorption
#17
O V Berdugina, K A Berdugin
The aim of this study was to investigate dynamic changes in the laboratory parameters of peripheral blood, reflecting cellular and protein composition of the immune system in bone resorption. The study involved 108 patients with degenerative-dystrophic and posttraumatic disorders of the hip joint before and after joint replacement surgery. Half of the cases resulted in bone resorption. Dynamic monitoring was performed up to 7.5 years. It included flow cytometry (Coulter Epics XL, USA) and enzyme immunoassay to determine the amount of immunocompetent cells, immunoglobulin class M, A, G, E, cytokines, acute phase proteins (C-reactive protein, fibrinogen, albumin, ceruloplasmin, haptoglobin), parameters of neutrophil functional activity (lactoferrin cationic protein, myeloperoxidase, superoxide anion production)...
October 2017: Biomedit︠s︡inskai︠a︡ Khimii︠a︡
https://www.readbyqxmd.com/read/29080764/haptoglobin-and-serum-amyloid-a-concentrations-and-their-relationship-with-oocyst-count-in-neonatal-lambs-experimentally-infected-with-cryptosporidium-parvum
#18
Ceren Dinler, Bulent Ulutas, Huseyin Voyvoda, Pinar Alkim Ulutas, Kerem Ural, Tulin Karagenc
This study aimed to evaluate the acute phase response (APR) through haptoglobin (Hp) and serum amyloid A (SAA) concentrations in serum and to examine the correlation between these acute phase proteins (APPs) and oocyst shedding using experimental Cryptosporidium parvum (C. parvum) infection model in neonatal lambs. Twenty lambs were divided into two equal groups: group CON remained uninfected as negative control and lambs of the group EXP were inoculated orally with 1×10(6)C. parvum oocysts. Blood and faecal samples were obtained from both groups before colostrum intake and prior to inoculation (day-1), and at 2, 6, 13, and 20days post-inoculation (dpi)...
November 30, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/29079835/circulating-haptoglobin-and-metabolic-syndrome-in-renal-transplant-recipients
#19
Isidor Minović, Michele F Eisenga, Ineke J Riphagen, Else van den Berg, Jenny Kootstra-Ros, Anne-Roos S Frenay, Harry van Goor, Gerald Rimbach, Tuba Esatbeyoglu, Andy P Levy, Carlo Ajm Gaillard, Johanna M Geleijnse, Manfred L Eggersdorfer, Gerjan J Navis, Ido P Kema, Stephan J L Bakker
Haptoglobin (Hp) is an acute phase protein that has recently been linked to components of the metabolic syndrome (MetS). We aimed to evaluate Hp as marker of MetS, and to assess its association with long-term outcome in renal transplant recipients (RTR). We measured plasma Hp in a prospective cohort of 699 stable RTR and 149 healthy controls. Median plasma Hp concentration in RTR was 1.4 [interquartile range (IQR), 1.0-1.8] g/L, which was higher compared to 1.1 [0.9-1.4] g/L in controls (P < 0.001). Hp was independently associated with the MetS (β = 0...
October 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29077717/a-polymorphism-in-the-haptoglobin-haptoglobin-related-protein-locus-is-associated-with-risk-of-human-sleeping-sickness-within-cameroonian-populations
#20
Elvis Ofon, Harry Noyes, Julius Mulindwa, Hamidou Ilboudo, Martin Simuunza, Vincent Ebo'o, Flobert Njiokou, Mathurin Koffi, Bruno Bucheton, Pythagore Fogue, Christiane Hertz-Fowler, Annette MacLeod, Gustave Simo
BACKGROUND: Human African Trypanosomiasis (HAT) is a neglected disease targeted for elimination as a public health problem by 2020. Elimination requires a better understanding of the epidemiology and clinical evolution of HAT. In addition to the classical clinical evolution of HAT, asymptomatic carriers and spontaneous cure have been reported in West Africa. A genetic component to human susceptibility to HAT has been suggested to explain these newly observed responses to infection. In order to test for genetic associations with infection response, genetic polymorphism in 17 genes were tested (APOL1, IL1B, IL4, IL4R, IL6, IL8, IL12B, IL12RB1, IL10, TNFA, INFG, MIF, HLA-G, HLA-A, HP, HPR and CFH)...
October 27, 2017: PLoS Neglected Tropical Diseases
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