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Lactate Dehydrogenase

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https://www.readbyqxmd.com/read/29666561/comparison-of-barricor%C3%A2-vs-lithium-heparin-tubes-for-selected-routine-biochemical-analytes-and-evaluation-of-post-centrifugation-stability
#1
Anne Marie Dupuy, Stéphanie Badiou, Delphine Daubin, Anne Sophie Bargnoux, Chloé Magnan, Kadda Klouche, Jean Paul Cristol
Introduction: Obtaining suitable results unaffected by pre- or postanalytical phases is pivotal for clinical chemistry service. We aimed comparison and stability of nine biochemical analytes after centrifugation using Barricor™ plasma tubes with mechanical separator vs standard Vacutainer® lithium heparin tubes. Materials and methods: We collected samples on six healthy volunteers and nine patients from intensive care units into 6 mL plastic Vacutainer® lithium heparin tubes and 5...
June 15, 2018: Biochemia Medica: časopis Hrvatskoga Društva Medicinskih Biokemičara
https://www.readbyqxmd.com/read/29665664/-resting-metabolic-rate-estimated-by-bioelectrical-impedance-analysis-and-its-determinants-in-maintenance-hemodialysis-patients
#2
J J Da, H Y Peng, X Lin, Y Shen, J Q Zhao, S He, Y Zha
Objective: To explore the level of resting energy expenditure (REE) estimated by bioelectrical impedance analysis and the association of resting metabolic rate (RMR) with clinical related factors, and provide new ideas for improving protein energy wasting (PEW) in maintenance hemodialysis (MHD) patients. Methods: Seven hundred and sixty-five subjects receiving MHD between July 2015 and September 2016 in 11 hemodialysis centers in Guizhou province were enrolled in this cross-sectional study. Bioelectrical impedance analysis was used to measure RMR and body composition, such as lean body mass, fat mass and body cell mass (BCM)...
March 27, 2018: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29665648/ischemia-reperfusion-injury-in-male-guinea-pigs-an-efficient-model-to-investigate-myocardial-damage-in-cardiovascular-complications
#3
Divya Dasagrandhi, Arul Salomee Kamalabai R, Anusuyadevi Muthuswamy, Angela Marie Lennox, Tamilselvan Jayavelu, Vasudharani Devanathan, Jayachandran Kesavan Swaminathan
Myocardial ischemia/reperfusion (I/R) injury is the major problem that aggravates cardiac damage. Several established animal models fail to explain the similarity in disease mechanism and progression as seen in humans; whereas guinea pig shows high similarity in cardiovascular parameters. Hence, current study is aimed to develop an animal model using guinea pigs that may best correlate with disease mechanism of human myocardial I/R injury. Male guinea pigs were randomized into three groups: normal diet (ND), high fat diet (HFD) and sham; fed with respective diets for 90 days...
March 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29663739/neurotoxic-effects-of-domoic-acid-on-dopaminergic-neurons-in-primary-mesencephalic-cell-culture
#4
Khaled Radad, Mubarak Al-Shraim, Ahmed Al-Emam, Rudolf Moldzio, Wolf-Dieter Rausch
INTRODUCTION: Domoic acid is a potent marine neurotoxin produced by certain species of the diatom genus Pseudonitzschia. To our knowledge, there are no studies that have investigated neurotoxic effects of domoic acid on dopaminergic neurons. Accordingly, the present study was carried out to investigate the potential neurotoxic effects of domoic acid on dopaminergic neurons in primary mesencephalic cell culture. MATERIAL AND METHODS: Cultures prepared from embryonic mouse mesencephala (total of 250 embryos) were treated with different concentrations of domoic acid (0...
2018: Folia Neuropathologica
https://www.readbyqxmd.com/read/29663649/trem2-inhibits-inflammatory-responses-in-mouse-microglia-by-suppressing-the-pi3k-nf-%C3%AE%C2%BAb-signaling
#5
Caixia Li, Bing Zhao, Caizhao Lin, Zhiping Gong, Xiaoxia An
This study aimed to investigate the effects of triggering receptor expressed on myeloid cell-2 (TREM2) on the production of pro-inflammatory mediators and cytokines induced by lipopolysaccharide (LPS) in BV2 microglia. TREM2 expression or TREM2-specific siRNA were used to induce TREM2 overexpression or silencing. The BV2 cells were pre-treated with the PI3K inhibitor of LY294002 for1 h and stimulated with LPS for 24 h. Then, the cell viability, apoptosis, phagocytosis, nitric oxide (NO), lactate dehydrogenase (LDH) and cytokine production, as well as the activation of AKT and NF-kB were determined, respectively...
April 16, 2018: Cell Biology International
https://www.readbyqxmd.com/read/29662077/pharmacodynamics-of-mutant-idh1-inhibitors-in-glioma-patients-probed-by-in-vivo-3d-mrs-imaging-of-2-hydroxyglutarate
#6
Ovidiu C Andronesi, Isabel C Arrillaga-Romany, K Ina Ly, Wolfgang Bogner, Eva M Ratai, Kara Reitz, A John Iafrate, Jorg Dietrich, Elizabeth R Gerstner, Andrew S Chi, Bruce R Rosen, Patrick Y Wen, Daniel P Cahill, Tracy T Batchelor
Inhibitors of the mutant isocitrate dehydrogenase 1 (IDH1) entered recently in clinical trials for glioma treatment. Mutant IDH1 produces high levels of 2-hydroxyglurate (2HG), thought to initiate oncogenesis through epigenetic modifications of gene expression. In this study, we show the initial evidence of the pharmacodynamics of a new mutant IDH1 inhibitor in glioma patients, using non-invasive 3D MR spectroscopic imaging of 2HG. Our results from a Phase 1 clinical trial indicate a rapid decrease of 2HG levels by 70% (CI 13%, P = 0...
April 16, 2018: Nature Communications
https://www.readbyqxmd.com/read/29661300/chitosan-functionalized-poly-%C3%AE%C2%B5-caprolactone-electrospun-fibers-and-3d-printed-scaffolds-as-antibacterial-materials-for-tissue-engineering-applications
#7
Myriam G Tardajos, Giuseppe Cama, Mamoni Dash, Lara Misseeuw, Tom Gheysens, Christian Gorzelanny, Tom Coenye, Peter Dubruel
Tissue engineering (TE) approaches often employ polymer-based scaffolds to provide support with a view to the improved regeneration of damaged tissues. The aim of this research was to develop a surface modification method for introducing chitosan as an antibacterial agent in both electrospun membranes and 3D printed poly-ε-caprolactone (PCL) scaffolds. The scaffolds were functionalized by grafting methacrylic acid N-hydroxysuccinimide ester (NHSMA) onto the surface after Ar-plasma/air activation. Subsequently, the newly-introduced NHS groups were used to couple with chitosan of various molecular weights (Mw)...
July 1, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29660758/intracellular-expression-of-antifreeze-peptides-in-food-grade-lactococcus-lactis-and-evaluation-of-their-cryoprotective-activity
#8
Li Zhang, Quan Jin, Jing Luo, Jinhong Wu, Shaoyun Wang, Zhengwu Wang, Shengxiang Gong, Wei Zhang, Xiaohong Lan
Antifreeze peptides can protect living organisms from low temperatures by preventing damage or killing due to ice crystal formation between cells. Therefore, antifreeze peptides can be used as a low temperature protectant for cryopreservation of cells and tissues, and also in food production. In this study, a recombinant SF-P gene was constructed and inserted into pNZ8149 to construct a food grade expression vector, which was then electroporated into Lactococcus lactis NZ3900. The expression of the target protein was induced using Nisin, and the optimal expression condition was determined to be a pH of 6...
April 16, 2018: Journal of Food Science
https://www.readbyqxmd.com/read/29660253/airway-stenting-for-patients-with-airway-stenosis-due-to-small-cell-lung-cancer
#9
Masahide Oki, Hideo Saka
BACKGROUND: Airway stenting has been reported to be useful for patients with malignant airway stenosis as a bridge to tumor-specific therapy, such as chemotherapy and radiation therapy, as well as palliative therapy. However, its role in patients with small-cell lung cancer (SCLC), the most aggressive lung cancer subtype, is unclear. We investigated the efficacy of airway stenting for patients with airway stenosis resulting from SCLC. METHODS: All stenting procedures were performed using both rigid and flexible bronchoscopes under general anesthesia...
April 16, 2018: Clinical Respiratory Journal
https://www.readbyqxmd.com/read/29659466/levels-of-hemolysis-markers-in-erythrocyte-concentrates-administered-using-a-syringe-infusion-pump
#10
Fernanda Figueiredo Gannam, Aline Santa Cruz Belela-Anacleto, Denise Miyuki Kusahara, Mavilde Gonçalves Pedreira
Syringe infusion pumps (SIPs) led to major advances in infusion therapy and were gradually applied to the transfusion of packed red blood cells (RBCs), raising questions about possible cell damage. The objectives of this study were to determine levels of hematocrit (%), total hemoglobin (g/dL), free hemoglobin (g/dL), lactate dehydrogenase (units/L), potassium (mmol/L), the degree of hemolysis (%) of RBCs infused by an SIP, and to investigate the influence of the infusion rate. The experimental study comprised 14 RBCs, 3 SIPs, and infusion rates of 5, 10, and 20 mL/h...
May 2018: Journal of Infusion Nursing: the Official Publication of the Infusion Nurses Society
https://www.readbyqxmd.com/read/29659371/real-world-use-safety-and-survival-of-ipilimumab-in-metastatic-cutaneous-melanoma-in-the-netherlands
#11
Anouk Jochems, Brenda Leeneman, Margreet G Franken, Maartje G Schouwenburg, Maureen J B Aarts, Alexander C J van Akkooi, Franchette W P J van den Berkmortel, Alfonsus J M van den Eertwegh, Gerard Groenewegen, Jan Willem B de Groot, John B A G Haanen, Geke A P Hospers, Ellen Kapiteijn, Rutger H Koornstra, Wim H J Kruit, Marieke W J Louwman, Djura Piersma, Rozemarijn S van Rijn, Albert J Ten Tije, Gerard Vreugdenhil, Michel W J M Wouters, Carin A Uyl-de Groot, Koos J M van der Hoeven
Phase III trials with ipilimumab showed an improved survival in patients with metastatic melanoma. We evaluated the use and safety of ipilimumab, and the survival of all patients with metastatic cutaneous melanoma (N=807) receiving ipilimumab in real-world clinical practice in The Netherlands using data from the Dutch Melanoma Treatment Registry. Patients who were registered between July 2012 and July 2015 were included and analyzed according to their treatment status: treatment-naive (N=344) versus previously-treated (N=463)...
April 13, 2018: Anti-cancer Drugs
https://www.readbyqxmd.com/read/29658909/pretreatment-with-argon-protects-human-cardiac-myocyte-like-progenitor-cells-from-oxygen-glucose-deprivation-induced-cell-death-by-activation-of-akt-and-differential-regulation-of-mapkinases
#12
Hong Qi, Lourdes Soto-Gonzalez, Konstantin A Krychtiuk, Sarah Ruhittel, Christoph Kaun, Walter S Speidl, Attila Kiss, Bruno K Podesser, Shanglong Yao, Klaus Markstaller, Klaus U Klein, Verena Tretter
BACKGROUND: The noble gas argon induces cardioprotection in a rabbit model of myocardial ischemia and reperfusion. However, no studies in human primary cells or subjects have been performed so far. We used human cardiac myocyte-like progenitor cells (HCMs) to investigate the protective effect on the cellular level. METHODS: HCMs were pretreated with 30% or 50% argon before oxygen-glucose deprivation (OGD) and reperfusion. We evaluated apoptotic states by flow cytometry and the activation of mitogen-activated protein kinase (MAPKs) members extracellular signal-regulated kinase (ERK), c-jun N-terminal kinase (JNK), p38 MAPkinase, and protein kinase B (Akt) by Westernblot analysis and by activity assays of downstream transcription factors...
May 2018: Shock
https://www.readbyqxmd.com/read/29658580/norepinephrine-inhibits-the-cytotoxicity-of-nk92%C3%A2-mi-cells-via-the-%C3%AE-2%C3%A2-adrenoceptor-camp-pka-p%C3%A2-creb-signaling-pathway
#13
Zan Sun, Diandong Hou, Shuli Liu, Weixin Fu, Jiahui Wang, Zaifu Liang
Norepinephrine (NE) can regulate natural killer (NK) cell activity, but the mechanism remains unclear. In the present study the roles of adrenergic receptors (ARs) in inhibiting NK92‑MI cells‑mediated cytotoxicity by NE were investigated. To examine the effect of NE on NK92‑MI cytotoxicity, a lactate dehydrogenase‑release cytotoxicity assay was used to determine the cytotoxicity of NK92‑MI cells against K562 cells. To evaluate the possible function of the α, β1 and β2 AR in mediating NE‑induced effects, NK92‑MI cells were pre‑incubated with phenol‑amine, CGP20712A and ICI118551 prior to stimulation by NE...
April 12, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29658475/-aerobic-glycolysis-activation-through-canonical-wnt-%C3%AE-catenin-pathway-in-als
#14
Alexandre Vallée
Energy is the major determinant of neuronal viability. We focus our synthesis on the hypothesis of the development of aerobic glycolysis by the stimulation of the canonical WNT/β-catenin pathway in amyotrophic lateral sclerosis (ALS). The stimulation of the canonical WNT/β-catenin pathway induces the activation of aerobic glycolysis, also called Warburg effect, via the stimulation of glycolytic enzymes such as Glut (glucose transporter), PKM2 (pyruvate kinase M2), PDK1 (pyruvate dehydrogenase kinase 1), LDH-A (lactate dehydrogenase A) and MCT-1 (monocarboxylate transporter 1)...
April 2018: Médecine Sciences: M/S
https://www.readbyqxmd.com/read/29658454/-clinical-features-and-prognosis-of-malignancy-associated-hemophagocytic-lymphohistiocytosis-in-children-a-clinical-analysis-of-24-cases
#15
Wan-Yan Zhang, Yuan Zhang, Nan-Nan Dong, Ying-Chao Wang, Guang-Yao Sheng, Xue-Ju Xu, Yu-Feng Liu
OBJECTIVE: To investigate the clinical features and prognosis of malignancy-associated hemophagocytic lymphohistiocytosis (MAHS) in children. METHODS: A retrospective analysis was performed for the primary diseases, clinical features, and prognosis of 24 children with MAHS. RESULTS: Among the 24 children, 11 (46%) had MAHS induced by tumor and 13 (54%) had chemotherapy-associated MAHS. As for primary diseases, 17 children had acute leukemia, 6 had lymphoma, and 1 had neuroblastoma...
April 2018: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/29658305/liver-antioxidant-and-aerobic-status-improves-after-metformin-and-melatonin-administration-in-a-rat-model-of-high-fat-diet-and-mammary-carcinogenesis
#16
Natalia Kurhaluk, Bianka Bojková, Pawel J Winklewski
Oxidative stress is involved in the development of various cancers. In the present study the effect of long-term administration of peroral antidiabetic metformin and pineal hormone melatonin on liver antioxidant and aerobic status in female Sprague-Dawley rats carrying mammary tumors induced by N-methyl-N-nitrosourea was evaluated. Both substances were administered in a preventive/curative manner (12 days before and 16 weeks after the carcinogen application). Carcinogen administration induced oxidative stress: the level of thiobarbituric acid reactive products (TBARS) as a marker of reactive oxygen species (ROS) generation in liver increased as well as the level of oxidatively modified protein content (OMP, aldehyde and ketone derivates)...
April 15, 2018: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/29656994/an-ex-vivo-abomasal-ovine-model-to-study-the-immediate-immune-response-in-the-context-of-haemonchus-contortus-larval-stage
#17
Saeed El-Ashram, Cuiping Li, Fathi Abouhajer, Rashid Mehmood, Ibrahim Al Nasr, Yinghui Zhang, Tang Lu, Ding Yili, Xun Suo, Zhang Haoji, Zhili Li, Shujian Huang
We have set up an ex vivo ovine abomasal model, which can mimic the multicellular process to explore the early steps in haemonchine nematode infection using RNA-seq technology. Ovine abomasal explants were collected for histological and transcriptional analysis and supernatants collected to quantitate lactate dehydrogenase (LDH) enzymes. Atotal of 233 were substantially induced genes between L4 -inoculated and uninoculated-control tissues, respectively. However, a total of 14 were considerably down-regulated genes between the 51 aforementioned tissues...
April 30, 2018: Veterinary Parasitology
https://www.readbyqxmd.com/read/29656184/ropivacaine-regulates-the-expression-and-function-of-heme-oxygenase-1
#18
Xiangbiao Yan, Yu Li, Xuechang Han, Xu Dong, Yajie Zhang, Qunzhi Xing
As a new generation of amide-type local anesthetics (LAs), ropivacaine has been widely used for pain management in clinical settings. Increasing evidence has shown that administration of ropivacaine causes cytotoxic effects and apoptosis. However, the underlying molecular mechanisms still need to be elucidated. In the current study, our results indicated that ropivacaine treatment caused a significant induction of heme oxygenase-1 (HO-1) at both the mRNA and protein levels in human SHSY5Y cells. Levels of HO-1 mRNA and protein peaked at 1 h and 18 h, respectively, in response to ropivacaine treatment...
April 12, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29655783/cytoto-xicity-of-34-fda-approved-small-molecule-kinase-inhibitor-s-in-primary-rat-and-human-hepatocytes
#19
Jun Zhang, Lijun Ren, Xi Yang, Matthew White, James Greenhaw, Tashika Harris, Qiangen Wu, Matthew Bryant, Thomas Papoian, William Mattes, Qiang Shi
Of the 34 FDA approved oral small-molecule kinase inhibitors (KI), 23 (68%) have warnings for hepatotoxicity in product labeling. To better understand the mechanisms of KI hepatotoxicity and whether such effects can be predicted, we examined 34 KIs for cytotoxicity in primary rat and human hepatocytes. The hepatocytes were treated with KIs at ten concentrations normalized to maximal therapeutic blood levels (Cmax). At 5 and 24 h post treatment, lactate dehydrogenase or alanine aminotransferase leakage, caspase 3/7 activities and cellular adenosine triphosphate levels were measured...
April 12, 2018: Toxicology Letters
https://www.readbyqxmd.com/read/29655684/protective-role-and-mechanism-of-snakegourd-peel-against-myocardial-infarction-in-rats
#20
Guanlin Yang, Dongyu Min, Junwei Yan, Ming Yang, Guijun Lin
BACKGROUND: Injection of snakegourd peel (SP), an herb used in traditional Chinese medicine, is used to treat coronary artery disease and stable angina in China. However, its therapeutic role and mechanism of action for the treatment of myocardial infarction (MI) is not fully understood. PURPOSE: The present study was designed to investigate the effect of SP on MI-induced cardiac injury and elucidate its underlying molecular mechanisms. METHODS: To create an in vivo model of MI, we ligated the left coronary artery of Wistar rats...
March 15, 2018: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
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