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Lactate Dehydrogenase

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https://www.readbyqxmd.com/read/29226724/standardization-of-clinical-enzyme-analysis-using-frozen-human-serum-pools-with-values-assigned-by-the-international-federation-of-clinical-chemistry-and-laboratory-medicine-reference-measurement-procedures
#1
Qing Tong, Baorong Chen, Rui Zhang, Chang Zuo
Variation in clinical enzyme analysis, particularly across different measuring systems and laboratories, represents a critical but long-lasting problem in diagnosis. Calibrators with traceability and commutability are imminently needed to harmonize analysis in laboratory medicine. Fresh frozen human serum pools were assigned values for alanine aminotransferase (ALT), aspartate aminotransferase (AST), gamma-glutamyltransferase (GGT), creatine kinase (CK) and lactate dehydrogenase (LDH) by six laboratories with established International Federation of Clinical Chemistry and Laboratory Medicine reference measurement procedures...
December 9, 2017: Scandinavian Journal of Clinical and Laboratory Investigation
https://www.readbyqxmd.com/read/29226713/-prognostic-importance-of-lactate-dehydrogenase-ldh-in-oncology
#2
Dániel Deme, András Telekes
Glycolysis is increased in most of the malignant cells, providing the largest proportion of energy needed for cell proliferation. Lactate dehydrogenase (LDH) catalyses the reversible process of pyruvate to lactate in anaerobic condition. LDHA isoenzyme expressed mainly by malignant cells, significantly increases lactate formation. Lactate induces the proliferation of oxygenated malignant cells, angiogenesis, and inhibits the innate and adaptive immune responses. Baseline serum LDH elevation correlates with shorter survival...
December 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/29226643/prognostic-value-of-serum-lactate-dehydrogenase-in-patients-with-nasopharyngeal-carcinoma-a-meta-analysis
#3
Changyun Zhai, Ke Gu, Xiaoming Zhai, Jianping Wang, Junning Zhang
BACKGROUND: Serum-lactate dehydrogenase (S-LDH) is reported to be associated with poor survival in patients with nasopharyngeal carcinoma (NPC); however, the results are inconsistent. The aim of the study was to perform a meta-analysis to evaluate the prognostic value of S-LDH in patients with NPC. METHODS: PubMed and Web of Science were searched for relevant studies, and the fixed-effects model was employed to pool the hazard risks (HRs) from individual studies when no substantial heterogeneity was detected; otherwise, the random-effects model was used...
November 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/29225629/synthesis-sar-and-docking-studies-disclose-2-arylfuran-1-4-naphthoquinones-as-in-vitro-antiplasmodial-hits
#4
Tatiane Freitas Borgati, Maria Fernanda Alves do Nascimento, Juma Fortunato Bernardino, Lunamaura Claudia Oliveira Martins, Alex Gutterres Taranto, Alaíde Braga de Oliveira
A total of 28 lapachol-related naphthoquinones with four different scaffolds were synthesized and spectroscopically characterized. In vitro antiplasmodial activity was assayed against the chloroquine-resistant Plasmodium falciparum W2 strain by the parasite lactate dehydrogenase (pLDH) method. Cytotoxicity against Hep G2A16 cell was determined by the MTT assay. All compounds disclosed higher in vitro antiplasmodial activity than lapachol. Ortho- and para-naphthoquinones with a furan ring fused to the quinonoid moiety were more potent than 2-hydroxy-3-(1'-alkenyl)-1,4-naphthoquinones, while ortho-furanonaphthoquinones were more cytotoxic...
2017: Journal of Tropical Medicine
https://www.readbyqxmd.com/read/29225201/3-bromopyruvate-as-a-potential-pharmaceutical-in-the-light-of-experimental-data
#5
Izabela Szczuka, Andrzej Gamian, Grzegorz Terlecki
3-Bromopyruvate (3-BrPA) is an halogenated analogue of pyruvic acid known for over four decades as an alkylating agent reacting with thiol groups of many proteins. It enters animal cells like a lactate: via monocarboxylic acid transporters. Increasing interest in this compound, in recent times, is mainly due to hopes associated with its anticancer action. It is based on the impairment of energy metabolism of tumor cells by inhibiting enzymes in the glycolysis pathway (hexokinase II, glyceraldehyde 3-phosphate dehydrogenase, phosphoglycerate kinase) and the oxidative phosphorylation (succinate dehydrogenase)...
December 8, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/29225109/raspberry-ketone-protects-against-isoproterenol-induced-myocardial-infarction-in-rats
#6
Vasim Khan, Sumit Sharma, Uma Bhandari, Syed Mansoor Ali, Syed Ehtaishamul Haque
AIM: The cardioprotective role of raspberry ketone (RK) against isoproterenol (ISO)-induced myocardial infarction (MI) in rats was assessed. MATERIALS AND METHODS: Rats were randomly divided into Group I - Vehicle control; Group II - Toxic control ISO (85mg/kg, s.c.); Group III, IV and V - RK (50, 100 and 200mg/kg, respectively) with ISO; Group VI- RK (200mg/kg) alone; Group VII - Propranolol (10mg/kg) with ISO; and Group VIII - Propranolol (10mg/kg) alone. After twenty-four hours of the last dose, animals were sacrificed and creatine kinase-MB, lactate dehydrogenase, total cholesterol, triglycerides, high-density-lipoprotein, low-density-lipoprotein, very-low-density-lipoprotein, malondialdehyde, reduced glutathione, superoxide dismutase, catalase, Na+, K+-ATPase, nitric oxide, histopathological and immunohistochemical analysis (tumor necrosis factor-α and inducible nitric oxide synthase) were performed...
December 7, 2017: Life Sciences
https://www.readbyqxmd.com/read/29224125/substitution-of-soybean-meal-with-fermented-jatropha-kernel-meal-effect-on-growth-performance-body-composition-and-metabolic-enzyme-activity-of-labeo-rohita
#7
Vikas Phulia, Parimal Sardar, Narottam Prasad Sahu, Femi John Fawole, N Shamna, Subodh Gupta
A 60-day feeding trial was conducted to evaluate the nutritional potential of fermented Jatropha kernel meal (FJKM) in the diets of rohu, Labeo rohita, fingerlings. Four iso-nitrogenous (336 g kg-1) and iso-energetic (20 MJ kg-1) diets containing 0, 100, 200, and 300 g kg-1 FJKM in replacement of 0, 33.3, 66.7, and 100% soybean meal protein, respectively, were prepared and designated as control, T1, T2, and T3, respectively. A total of 180 acclimatized fish (average weight 6.05 ± 0.04 g) were equally distributed into four experimental groups in triplicates, and were fed their respective diets to satiation twice daily at 10:00 h and 18:00 h...
December 9, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29223503/multiple-collections-of-common-carp-cyprinus-carpio-l-semen-during-the-reproductive-period-and-its-effects-on-sperm-quality
#8
Beata Irena Cejko, Beata Sarosiek, Sławomir Krejszeff, Radosław Kajetan Kowalski
Multiple collections of semen during the reproductive period of the common carp Cyprinus carpio L. were used to analyse changes in semen quality. Semen collection was performed on June 1 (first collection), 12 (second collection), and 19 (third collection) from individual males (n=11) by gentle abdominal massage. Semen quantity (semen volume and sperm count), quality (sperm motility and sperm viability), as well as seminal plasma parameters (pH of seminal plasma and seminal plasma osmotic pressure) and its enzymatic activity, e...
December 5, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/29222599/cigarette-smoke-induces-activation-of-polymorphonuclear-leukocytes
#9
Anita Somborac-Bačura, Sanja Popović-Grle, Vlasta Zovko, Tihana Žanić-Grubišić
INTRODUCTION: Cigarette smoking is a major risk factor for chronic obstructive pulmonary disease (COPD). Exposure to cigarette smoke may stimulate inflammatory response and activate polymorphonuclear leukocytes (PMN) thus resulting in secretion of cellular proteases. The aim of our study was to explore the effect of cigarette smoke extract (CSE) on the release of matrix metalloproteinase-9 (MMP-9) from PMN. METHODS: The study included 23 patients with stable COPD and 9 healthy controls...
December 8, 2017: Lung
https://www.readbyqxmd.com/read/29222289/what-is-the-role-of-screening-for-pulmonary-hypertension-in-adults-and-children-with-sickle-cell-disease
#10
REVIEW
Shaina M Willen, Mark T Gladwin
Patient case: An 18-year-old male patient with homozygous hemoglobin SS disease was evaluated for progressive dyspnea and elevated tricuspid regurgitant jet velocity (TRV) on echocardiography. The patient's case is described in detail in Lancet1 He had been treated with regular transfusions since childhood for stroke, had rare episodes of vaso-occlusive pain episodes, and did not take narcotic pain medications. He presented with progressive severe dyspnea on exertion and lower extremity edema. His laboratory tests were notable for a total hemoglobin level of 11...
December 8, 2017: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/29220765/transient-disturbance-of-engineered-zno-nanoparticles-enhances-the-resistance-and-resilience-of-anammox-process-in-wastewater-treatment
#11
Zheng-Zhe Zhang, Ya-Fei Cheng, Lian-Zeng-Ji Xu, Yu-Hui Bai, Jia-Jia Xu, Zhi-Jian Shi, Qian-Qian Zhang, Ren-Cun Jin
The increasing use of engineered nanoparticles (NPs) in consumer and industrial products raises concerns about their environmental impacts, but their potential influence on anaerobic ammonium oxidation (anammox) process in wastewater treatment remains unknown. In this study, the response of granule-based anammox reactor to different loads of ZnONPs was investigated. The introduction of 1-5mgL-1 ZnONPs did not affect reactor performance, but 90% of the nitrogen removal capacity was deprived by a shock of 10mgL-1 ZnONPs within 3days...
December 5, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29219249/activities-of-11-azaartemisinin-and-n-sulfonyl-derivatives-against-asexual-and-transmissible-malaria-parasites
#12
Rozanne Harmse, Dina Coertzen, Ho Ning Wong, Frans J Smit, Mariette E van der Watt, Janette Reader, Sindiswe H Nondaba, Lyn-Marie Birkholtz, Richard K Haynes, David D N'Da
Dihydroartemisinin (DHA), either used in its own right or as the active drug generated in vivo from the other artemisinins in current clinical use-artemether and artesunate-induces quiescence in ring-stage parasites of Plasmodium falciparum (Pf). This induction of quiescence is linked to artemisinin resistance. Thus, we have turned to structurally disparate artemisinins that are incapable of providing DHA on metabolism. Accordingly, 11-azaartemisinin 5 and selected N-sulfonyl derivatives were screened against intraerythrocytic asexual stages of drug-sensitive Pf NF54 and drug-resistant K1 and W2 parasites...
December 8, 2017: ChemMedChem
https://www.readbyqxmd.com/read/29219187/integrated-molecular-biochemical-and-physiological-assessment-unravels-key-extraction-method-mediated-influences-on-rat-neonatal-cardiomyocytes
#13
Leonardo Jensen, Elida Neri, Vinicius Bassaneze, Nathalia Corrêa De Almeida Oliveira, Rafael Dariolli, Thiago Lauro Turaça, Débora Levy, Douglas Veronez, Mariana Sacrini Ayres Ferraz, Adriano Mesquita Alencar, Sérgio Paulo Bydlowski, Idágene Aparecida Cestari, José Eduardo Krieger
Neonatal cardiomyocytes are instrumental for disease modeling, but the effects of different cell extraction methods on basic cell biological processes remain poorly understood. We assessed the influence of two popular methods to extract rat neonatal cardiomyocytes, Pre-plating (PP) and Percoll (PC) on cell structure, metabolism, and function. Cardiomyocytes obtained from PP showed higher gene expression for troponins, titin, and potassium and sodium channels compared to PC. Also, PP cells displayed higher levels of troponin I protein...
December 8, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29218442/silver-nanoparticle-conjugation-affects-antiacanthamoebic-activities-of-amphotericin-b-nystatin-and-fluconazole
#14
Ayaz Anwar, Ruqaiyyah Siddiqui, Muhammad Asim Hussain, Dania Ahmed, Muhammad Raza Shah, Naveed Ahmed Khan
Infectious diseases are the leading cause of morbidity and mortality, killing more than 15 million people worldwide. This is despite our advances in antimicrobial chemotherapy and supportive care. Nanoparticles offer a promising technology to enhance drug efficacy and formation of effective vehicles for drug delivery. Here, we conjugated amphotericin B, nystatin (macrocyclic polyenes), and fluconazole (azole) with silver nanoparticles. Silver-conjugated drugs were synthesized successfully and characterized by ultraviolet-visible spectrophotometry, Fourier transform infrared spectroscopy, and atomic force microscopy...
December 7, 2017: Parasitology Research
https://www.readbyqxmd.com/read/29217380/evaluation-of-rapid-pfhrp-2-pldh-based-tests-in-diagnosing-microscopy-confirmed-falciparum-malaria-in-hodeidah-governorate-yemen
#15
Ahmed A Azazy, Ali Jamaly Alhawery, Rashad Abdul-Ghani, R A Alharbi, Shaia S R Almalki
Along with the determination of malaria infection rate among suspected patients attending hospitals in Hodeidah governorate, the present study evaluated the accuracy of Plasmodium falciparum histidine-rich protein-2 (PfHRP-2)/parasite-specific lactate dehydrogenase (pLDH)-based rapid diagnostic test (RDT) for the diagnosis of microscopy-confirmed falciparum malaria. An overall malaria infection rate of 19.3% (57/295) among suspected patients attending hospitals was microscopically confirmed. The sensitivity of thin blood films for the detection of malaria parasites was 79...
December 5, 2017: Acta Tropica
https://www.readbyqxmd.com/read/29216729/periostin-normalizes-levels-of-cardiac-markers-in-rats-with-experimental-isoproterenol-cardiotoxicity
#16
A K Devrim, M Sozmen, T Devrim, M Sudagidan, M Cinar, Y B Kabak
BACKGROUND: Although the molecular mechanism of cardiac healing is not fully understood, myocardial infarction is one of the most usual diagnoses in hospitalized patients in industrialized nations while periostin has been recently suggested to have a potential in tissue repairing following myocardial ischemia. OBJECTIVES: To investigate the effects of periostin on the levels of selected cardiac parameters (cardiac troponin I and T, creatine kinase and creatine kinase isoenzyme-MB), antioxidant/lipid peroxidation parameters (superoxide dismutase, catalase, and malondialdehyde), hepatic parameters (alkaline phosphatase, lactate dehydrogenase, aspartate and alanine transaminases) as well as lipids (total cholesterol, triglyceride, high, low and very‑low‑density lipoproteins) in a rat model of isoproterenol---induced myocardial injury...
2017: Bratislavské Lekárske Listy
https://www.readbyqxmd.com/read/29214974/insights-into-the-candidacidal-mechanism-of-ctn-15-34-a-carboxyl-terminal-crotalicidin-derived-peptide-related-to-cathelicidins
#17
Carolina Sidrim P Cavalcante, Francisca Lidiane Linhares de Aguiar, Raquel O S Fontenelle, Ramon Roseo de P P B de Menezes, Alice Maria Costa Martins, Cláudio B Falcão, David Andreu, Gandhi Rádis-Baptista
PURPOSE: Ctn[15-34], a carboxyl-terminal fragment of crotalicidin (a cathelicidin from the venom gland of a South American rattlesnake), has shown antifungal activity against clinical and standard strains of Candida species. The aim of the present work was to investigate the underlying mechanisms of the candidicidal activity of Ctn[15-34]. METHODOLOGY: The time-kill profile and drug synergism were evaluated by means of a microdilution assay and multi-parametric flow cytometry...
December 7, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/29214374/serum-antioxidant-parameters-are-significantly-increased-in-patients-with-type-2-diabetes-mellitus-after-consumption-of-chinese-propolis-a-randomized-controlled-trial-based-on-fasting-serum-glucose-level
#18
Weina Gao, Lingling Pu, Jingyu Wei, Zhanxin Yao, Yawen Wang, Tala Shi, Liting Zhao, Changya Jiao, Changjiang Guo
INTRODUCTION: Propolis is a natural product with many biological activities. The present study was designed to evaluate the effects of Chinese propolis on glucose metabolism, antioxidant function, and inflammatory cytokines in patients with type 2 diabetes mellitus (T2DM). METHODS: In the 18-week study, recruited T2DM patients were randomly divided into a Chinese propolis group (900 mg/day) (n = 31) and a control group (n = 30) according to fasting serum glucose levels at baseline...
December 6, 2017: Diabetes Therapy: Research, Treatment and Education of Diabetes and related Disorders
https://www.readbyqxmd.com/read/29214230/cytotoxicity-of-endocytosis-and-efflux-inhibitors-in-the-bewo-cell-line
#19
Mansi Shah, Luke Bourner, Shariq Ali, Sanaalarab Al-Enazy, Erik Rytting
Aims: The purpose of this study was to determine the cell viability and cytotoxicity of various endocytosis and efflux inhibitors which can be used to determine transport and uptake mechanisms in the BeWo (b30 clone) human placental trophoblast cell line. Ethanol and dimethylsulfoxide (DMSO) were also studied since they are often used as cosolvents for administration of these inhibitors. Methodology: The water-soluble tetrazolium-1 (WST-1) assay was used to quantify cell viability and the lactate dehydrogenase (LDH) assay was used to determine cytotoxicity...
2017: Journal of Pharmaceutical Research International
https://www.readbyqxmd.com/read/29213352/echinacoside-alleviates-uvb-irradiation-mediated-skin-damage-via-inhibition-of-oxidative-stress-dna-damage-and-apoptosis
#20
Di Zhang, Chengtao Lu, Zhe Yu, Xiayin Wang, Li Yan, Juanli Zhang, Hua Li, Jianbo Wang, Aidong Wen
Ultraviolet B (UVB) irradiation has been known to cause skin damage, which is associated with oxidative stress, DNA damage, and apoptosis. Echinacoside is a phenylethanoid glycoside isolated from Herba Cistanches, which exhibits strong antioxidant activity. In this study, we evaluate the photoprotective effect of echinacoside on UVB-induced skin damage and explore the potential molecular mechanism. BALB/c mice and HaCaT cells were treated with echinacoside before UVB exposure. Histopathological examination was used to evaluate the skin damage...
2017: Oxidative Medicine and Cellular Longevity
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