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Cell-free hemoglobin

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https://www.readbyqxmd.com/read/29133160/the-changes-of-red-blood-cell-viscoelasticity-and-sports-anemia-in-male-24-hr-ultra-marathoners
#1
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/29133139/methemoglobin-reductase-activity-in-intact-fish-red-blood-cells
#2
Frank B Jensen, Karsten Nielsen
Red blood cells (RBCs) possess methemoglobin reductase activity that counters the ongoing oxidation of hemoglobin (Hb) to methemoglobin (metHb), which in circulating blood is caused by Hb autoxidation or reactions with nitrite. We describe an assay for determining metHb reductase activity in intact RBCs in physiological saline at normal Pco2 and pH. After initial loading of oxygenated RBCs with nitrite (partly oxidizing Hb to metHb), the nitrite is removed by three washes of the RBCs in nitrite-free physiological saline to enable the detection of RBC metHb reductase activity in the absence of counteracting oxidation...
November 10, 2017: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/29129689/ascorbic-acid-attenuates-endothelial-permeability-triggered-by-cell-free-hemoglobin
#3
Jamie L Kuck, Julie A Bastarache, Ciara M Shaver, Joshua P Fessel, Sergey I Dikalov, James M May, Lorraine B Ware
BACKGROUND: Increased endothelial permeability is central to shock and organ dysfunction in sepsis but therapeutics targeted to known mediators of increased endothelial permeability have been unsuccessful in patient studies. We previously reported that cell-free hemoglobin (CFH) is elevated in the majority of patients with sepsis and is associated with organ dysfunction, poor clinical outcomes and elevated markers of oxidant injury. Others have shown that Vitamin C (ascorbate) may have endothelial protective effects in sepsis...
November 9, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29127679/alternative-donor-unrelated-donor-transplants-for-the-%C3%AE-thalassemia-and-sickle-cell-disease
#4
Courtney D Fitzhugh, Allistair Abraham, Matthew M Hsieh
Considerable progress with respect to donor source has been achieved in allogeneic stem cell transplant for patients with hemoglobin disorders, with matched sibling donors in the 1980s, matched unrelated donors and cord blood sources in the 1990s, and haploidentical donors in the 2000s. Many studies have solidified hematopoietic progenitors from matched sibling marrow, cord blood, or mobilized peripheral blood as the best source-with the lowest graft rejection and graft versus host disease (GvHD), and highest disease-free survival rates...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29123109/label-free-automated-three-dimensional-imaging-of-whole-organs-by-microtomy-assisted-photoacoustic-microscopy
#5
Terence T W Wong, Ruiying Zhang, Chi Zhang, Hsun-Chia Hsu, Konstantin I Maslov, Lidai Wang, Junhui Shi, Ruimin Chen, K Kirk Shung, Qifa Zhou, Lihong V Wang
Three-dimensional (3D) optical imaging of whole biological organs with microscopic resolution has remained a challenge. Most versions of such imaging techniques require special preparation of the tissue specimen. Here we demonstrate microtomy-assisted photoacoustic microscopy (mPAM) of mouse brains and other organs, which automatically acquires serial distortion-free and registration-free images with endogenous absorption contrasts. Without tissue staining or clearing, mPAM generates micrometer-resolution 3D images of paraffin- or agarose-embedded whole organs with high fidelity, achieved by label-free simultaneous sensing of DNA/RNA, hemoglobins, and lipids...
November 9, 2017: Nature Communications
https://www.readbyqxmd.com/read/29120945/a-comparison-of-red-cell-rejuvenation-versus-mechanical-washing-for-the-prevention-of-transfusion-associated-organ-injury-in-swine
#6
Marcin J Woźniak, Saqib Qureshi, Nikol Sullo, William Dott, Rebecca Cardigan, Michael Wiltshire, Mintu Nath, Nishith N Patel, Tracy Kumar, Alison H Goodall, Gavin J Murphy
BACKGROUND: We evaluated the effects of two interventions that modify the red cell storage lesion on kidney and lung injury in experimental models of transfusion. METHODS: White-landrace pigs (n = 32) were allocated to receive sham transfusion (crystalloid), 14-day stored allogeneic red cells, 14-day red cells washed using the red cells washing/salvage system (CATS; Fresenius, Germany), or 14-day red cells rejuvenated using the inosine solution (Rejuvesol solution; Zimmer Biomet, USA) and washed using the CATS device...
November 9, 2017: Anesthesiology
https://www.readbyqxmd.com/read/29104346/tessellated-permanent-magnet-circuits-for-flow-through-open-gradient-separations-of-weakly-magnetic-materials
#7
Lee R Moore, P Stephen Williams, Jeffrey J Chalmers, Maciej Zborowski
Emerging microfluidic-based cell assays favor label-free red blood cell (RBC) depletion. Magnetic separation of RBC is possible because of the paramagnetism of deoxygenated hemoglobin but the process is slow for open-gradient field configurations. In order to increase the throughput, periodic arrangements of the unit magnets were considered, consisting of commercially available Nd-Fe-B permanent magnets and soft steel flux return pieces. The magnet design is uniquely suitable for multiplexing by magnet tessellation, here meaning the tiling of the magnet assembly cross-sectional plane by periodic repetition of the magnet and the flow channel shapes...
April 1, 2017: Journal of Magnetism and Magnetic Materials
https://www.readbyqxmd.com/read/29101791/calpain-1-regulates-platelet-function-in-a-humanized-mouse-model-of-sickle-cell-disease
#8
Jennifer O Nwankwo, Thomas Gremmel, Anja J Gerrits, Farha J Mithila, Rod R Warburton, Nicholas S Hill, Yunzhe Lu, Lauren J Richey, Joseph A Jakubowski, Andrew L Frelinger, Athar H Chishti
One of the major contributors to sickle cell disease (SCD) pathobiology is the hemolysis of sickle red blood cells (RBCs), which release free hemoglobin and platelet agonists including adenosine 5'-diphosphate (ADP) into the plasma. While platelet activation/aggregation may promote tissue ischemia and pulmonary hypertension in SCD, modulation of sickle platelet dysfunction remains poorly understood. Calpain-1, a ubiquitous calcium-activated cysteine protease expressed in the hematopoietic cells, mediates aggregation of platelets in healthy mice...
October 26, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/29084189/-multiorgan-malfunction-after-fontan-operation-in-adult-patients
#9
Monika Smaś-Suska, Paweł Iwaszczuk, Beata Róg, Piotr Weryński, Maria Olszowska, Piotr Podolec, Lidia Tomkiewicz-Pająk
Although 85% of patients with univentricular heart after Fontan procedure survive twenty years after operation, the procedure alone seems to be an inadequate treatment as a permanent clinical solution. Patients with a "Fontan physiology" additionally have to face a various extra-cardiac complications, including thyroid, liver and kidney dysfunction, which are not only potentially life-threatening, but also can potentiate the circulatory insufficiency. AIM: The aim of the study was to assess a multiorgan dysfunction in adult patients after Fontan operation in long term follow-up and compare to healthy controls...
October 23, 2017: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29081812/peptide-inhibitor-of-complement-c1-inhibits-the-peroxidase-activity-of-hemoglobin-and-myoglobin
#10
Pamela S Hair, Kenji M Cunnion, Neel K Krishna
Hemoglobin is the natural carrier of oxygen in red blood cells (RBCs). While intracellular hemoglobin provides life-sustaining oxygen transport, extracellular free hemoglobin displays toxicity due to inherent peroxidase activity generating reactive oxygen species that subsequently react with the hemoglobin molecule to produce toxic heme degradation products resulting in free radicals, oxidative stress damage, and lipid peroxidation. We have recently demonstrated that Peptide Inhibitor of Complement C1 (PIC1) inhibits peroxidase activity of the heme-based enzyme myeloperoxidase...
2017: International Journal of Peptides
https://www.readbyqxmd.com/read/29070128/-clinical-observation-of-therapeutic-regimen-consisted-of-decitabine-combined-with-low-dose-ia-regimen-for-myelodysplastic-syndrome-eb
#11
Di Wu, Jin-Xia Hao, Jing Li, Mei Zhang
OBJECTIVE: To investigate the clinical efficacy of decitabine combined with low-dose IA for treating patients with myelodysplastic syndrome-EB. METHODS: Thirty-seven cases of myelodysplastic syndrome-EB patients diagnosed in the First Affiliated Hospital of Xi'an Jiaotong University from June 2015 to January 2017 were analyzed retrospectively. These patients accepted DAC+IA(19 cases) and DAC(18 cases) treatment separately, and the differences of clinical efficacy between them were compared...
October 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/29064631/ferric-citrate-supplementation-reduces-red-blood-cell-aggregation-and-improves-cd163-macrophage-mediated-hemoglobin-metabolism-in-a-rat-model-of-high-fat-diet-induced-obesity
#12
Ting-Yun Chang, Kai-Li Liu, Cheng Sheng Chang, Chien-Tien Su, Seu-Hwa Chen, Yu-Chieh Lee, Jung-Su Chang
SCOPE: In adults, >90% of the daily iron requirement is derived from macrophage-mediated heme iron recycling from senescent red blood cells (RBCs) or free hemoglobin (Hb). Currently, the effects of pharmacological doses of iron supplementation on RBCs and heme iron recycling in obesity are unclear. METHODS AND RESULTS: Sprague Dawley rats were fed a standard diet or a 50% high-fat diet (HFD) with (0.25, 1, and 2 g of ferric iron/kg diet) or without ferric citrate supplementation for 12 weeks...
October 24, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/29054042/spontaneous-hemoperitoneum-in-pregnancy-ship-and-endometriosis-a-systematic-review-of-the-recent-literature
#13
REVIEW
Marit C I Lier, Romana F Malik, Johannes C F Ket, Cornelis B Lambalk, Ivo A Brosens, Velja Mijatovic
Spontaneous Hemoperitoneum in Pregnancy (SHiP), an unprovoked (nontraumatic) intraperitoneal bleeding in pregnancy (up to 42days postpartum), is associated with serious adverse pregnancy outcomes. To evaluate the clinical consequences of SHiP and its association with endometriosis, a systematic review was conducted according to the PRISMA guidelines. PubMed, Embase.com and Thomson Reuters/Web of Science were searched for articles published since the latest review (August 2008) until September 2016. After assessment for eligibility, forty-four articles were included in this systematic review, describing 59 cases of SHiP...
October 12, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/29051184/novel-use-of-hydroxyurea-in-an-african-region-with-malaria-noharm-a-trial-for-children-with-sickle-cell-anemia
#14
Robert O Opoka, Christopher M Ndugwa, Teresa S Latham, Adam Lane, Heather A Hume, Phillip Kasirye, James S Hodges, Russell E Ware, Chandy C John
Hydroxyurea treatment is recommended for children with sickle cell anemia (SCA) living in high-resource malaria-free regions, but its safety and efficacy in malaria-endemic sub-Saharan Africa, where the greatest sickle cell burden exists, remain unknown. In vitro studies suggest hydroxyurea could increase malaria severity, and hydroxyurea-associated neutropenia could worsen infections. NOHARM was a randomized, double-blinded, placebo-controlled trial conducted in malaria-endemic Uganda, comparing hydroxyurea to placebo at 20 ± 2...
October 19, 2017: Blood
https://www.readbyqxmd.com/read/29046485/dimethyl-fumarate-increases-fetal-hemoglobin-provides-heme-detoxification-and-corrects-anemia-in-sickle-cell-disease
#15
Sriram Krishnamoorthy, Betty Pace, Dipti Gupta, Sarah Sturtevant, Biaoru Li, Levi Makala, Julia Brittain, Nancy Moore, Benjamin F Vieira, Timothy Thullen, Ivan Stone, Huo Li, William E Hobbs, David R Light
Sickle cell disease (SCD) results from a point mutation in the β-globin gene forming hemoglobin S (HbS), which polymerizes in deoxygenated erythrocytes, triggering recurrent painful vaso-occlusive crises and chronic hemolytic anemia. Reactivation of fetal Hb (HbF) expression ameliorates these symptoms of SCD. Nuclear factor (erythroid derived-2)-like 2 (Nrf2) is a transcription factor that triggers cytoprotective and antioxidant pathways to limit oxidative damage and inflammation and increases HbF synthesis in CD34+ stem cell-derived erythroid progenitors...
October 19, 2017: JCI Insight
https://www.readbyqxmd.com/read/29042854/influence-of-standard-laboratory-procedures-on-measures-of-erythrocyte-damage
#16
Lena Wiegmann, Diane A de Zélicourt, Oliver Speer, Alissa Muller, Jeroen S Goede, Burkhardt Seifert, Vartan Kurtcuoglu
The ability to characterize the mechanical properties of erythrocytes is important in clinical and research contexts: to diagnose and monitor hematologic disorders, as well as to optimize the design of cardiovascular implants and blood circulating devices with respect to blood damage. However, investigation of red blood cell (RBC) properties generally involves preparatory and processing steps. Even though these impose mechanical stresses on cells, little is known about their impact on the final measurement results...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29022484/prognostic-implication-of-simultaneous-anemia-and-lymphopenia-during-concurrent-chemoradiotherapy-in-cervical-squamous-cell-carcinoma
#17
Oyeon Cho, Mison Chun, Young-Taek Oh, O Kyu Noh, Suk-Joon Chang, Hee-Sug Ryu, Eun Ju Lee
Radioresistance often leads to poor survival in concurrent chemoradiotherapy-treated cervical squamous cell carcinoma, and reliable biomarkers can improve prognosis. We compared the prognostic potential of hemoglobin, absolute neutrophil count, and absolute lymphocyte count with that of squamous cell carcinoma antigen in concurrent chemoradiotherapy-treated squamous cell carcinoma. We analyzed 152 patients with concurrent chemoradiotherapy and high-dose-rate intracavitary brachytherapy-treated cervical squamous cell carcinoma...
October 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28993059/perioperative-blood-transfusion-adversely-affects-prognosis-after-nephrectomy-for-renal-cell-carcinoma
#18
Yasmin Abu-Ghanem, Dorit E Zilberman, Zohar Dotan, Issac Kaver, Jacob Ramon
BACKGROUND: It has been previously suggested that perioperative blood transfusion (PBT) may induce adverse oncological outcomes following cancer surgery. The aim of the current study is to evaluate the effect of PBT on the prognosis of patients who underwent nephrectomy due to renal cell carcinoma (RCC). METHODS: Study included 1,159 patients who underwent radical nephrectomy or partial nephrectomy (PN) between the years 1987 and 2013. Univariate and multivariate models were used to evaluate the association of PBT with cancer-specific survival (CSS), disease-free survival, and overall survival (OS)...
October 6, 2017: Urologic Oncology
https://www.readbyqxmd.com/read/28989286/effect-of-late-hiv-diagnosis-on-hiv-related-mortality-among-adults-in-general-hospitals-of-central-zone-tigray-northern-ethiopia-a-retrospective-cohort-study
#19
Hadera Belay, Fessahaye Alemseged, Teklit Angesom, Solomon Hintsa, Mebrahtu Abay
BACKGROUND: The global incidence of HIV infection is not significantly decreasing, especially in sub-Saharan African countries, including Ethiopia. Though there is availability and accessibility of free HIV services, people are not being diagnosed early for HIV, and hence patients are still dying of HIV-related causes. This research is aimed at verifying the effect of late diagnosis of HIV on HIV-related mortality in Central Zone Tigray, Ethiopia. METHODS: A retrospective cohort study among adult (≥15 years old) HIV patients in three general hospitals of Tigray was conducted...
2017: HIV/AIDS: Research and Palliative Care
https://www.readbyqxmd.com/read/28982674/haptoglobin-2-2-phenotype-is-associated-with-increased-acute-kidney-injury-after-elective-cardiac-surgery-in-patients-with-diabetes-mellitus
#20
Chenzhuo Feng, Bhiken I Naik, Wenjun Xin, Jennie Z Ma, David C Scalzo, Swapna Thammishetti, Robert H Thiele, Zhiyi Zuo, Jacob Raphael
BACKGROUND: Recent studies reported an association between the 2-2 phenotype of haptoglobin (Hp 2-2) and increased cardiorenal morbidity in nonsurgical diabetic patients. Our goal was to determine whether the Hp 2-2 phenotype was associated with acute kidney injury (AKI) after elective cardiac surgery in patients with diabetes mellitus. METHODS AND RESULTS: We prospectively enrolled 99 diabetic patients requiring elective cardiac surgery with cardiopulmonary bypass...
October 5, 2017: Journal of the American Heart Association
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