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Postȩpy Higieny i Medycyny Doświadczalnej

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https://www.readbyqxmd.com/read/28181912/the-role-of-oxidative-stress-and-nadph-oxidase-in-the-pathogenesis-of-atherosclerosis
#1
Dorota Bryk, Wioletta Olejarz, Danuta Zapolska-Downar
Reactive oxygen species (ROS) play a key role in the pathogenesis of atherosclerosis. The main mechanisms which are involved are low-density lipoprotein oxidative modification, inactivation of nitric oxide and modulation of redox-sensitive signaling pathways. ROS contribute to several aspects of atherosclerosis including endothelial cell dysfunction, monocyte/macrophage recruitment and activation, stimulation of inflammation, and inducing smooth muscle cell migration and proliferation. NADPH oxidase is the main source of ROS in the vasculature...
January 28, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28181911/molecular-diagnostics-of-periodontitis
#2
Izabela Korona-Głowniak, Radosław Siwiec, Marcin Berger, Anna Malm, Jolanta Szymańska
The microorganisms that form dental plaque are the main cause of periodontitis. Their identification and the understanding of the complex relationships and interactions that involve these microorganisms, environmental factors and the host's health status enable improvement in diagnostics and targeted therapy in patients with periodontitis. To this end, molecular diagnostics techniques (both techniques based on the polymerase chain reaction and those involving nucleic acid analysis via hybridization) come increasingly into use...
January 28, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28181909/visual-evoked-potentials-in-diagnostics-of-optic-neuropathy-associated-with-renal-failure
#3
Małgorzata Jurys, Sebastian Sirek, Aureliusz Kolonko, Dorota Pojda-Wilczek
Chronic renal failure is associated with many neurological complications. Due to accumulation of uremic neurotoxins axonal degeneration with its secondary demyelination occurs, which results in development of polineuropathy in 60‑100% of patients with chronic renal failure. One of the most severe peripheral neuropathy is optic neuropathy. It is associated with visual deterioration and reduction in quality of life. Symptoms of the optic neuropathy may appear either before or after dialysis therapy. They often worsen after renal transplant, probably due to immunosuppressive regimen...
January 22, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28181908/effects-of-endogenous-cardioprotective-mechanisms-on-ischemia-reperfusion-injury
#4
Marcin Kunecki, Wojciech Płazak, Piotr Podolec, Krzysztof S Gołba
Ischemic heart disease have been remarked as a leading cause of morbidity and mortality in adults. Early restoration of cardiac perfusion is necessary to restore perfusion of ischemic heart muscle. Effective revascularization reduce mortality by limiting myocardial necrosis at the acute phase of the cardiac infarction. However, reperfusion may induce a cascade of pathophysiological reactions causing the increase of the infarct area of the myocardium This phenomenon known as ischemia-reperfusion injury is responsible for up to 50% of the final infarct size...
January 10, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28181907/the-role-of-interleukin-15-in-neoplasia
#5
Małgorzata Chłopek, Artur Kowalik, Stanisław Góźdź, Katarzyna Koziak
Interleukin 15 is a pleiotropic cytokine of the four α helix bundle family. Binding to a heterotrimeric receptor complex, which consists of a unique, high affinity IL‑15Rα‑chain and IL-2/IL-15Rβ and IL‑2Rγ chains, IL‑15 activates signaling pathways leading to activation and proliferation of T and B cells, as well as natural killer cells. At the same time, IL‑15 protects effector cells from T regulatory cells and does not induce immune tolerance. The significant regulatory action of IL‑15 on the immune system provides new opportunities for development of anti‑cancer therapies...
January 10, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28181910/clinical-usefulness-of-serum-free-light-chains-measurement-in-patients-with-multiple-myeloma-comparative-analysis-of-two-different-tests
#6
Tadeusz Kubicki, Dominik Dytfeld, Aleksandra Baszczuk, Ewa Wysocka, Mieczysław Komarnicki, Krzysztof Lewandowski
INTRODUCTION: There are two commercially available tests for measurement of serum free light chains (sFLC) in multiple myeloma (MM) patients - Freelite and N Latex FLC. The aim of this study was to perform an assessment and direct comparison of the usefulness of the methods in routine clinical practice. METHODS: 40 refractory/relapsed MM patients underwent routine disease activity assessment studies, along with sFLC analysis using both assays. Correlation and concordance between the tests and sensitivity of studied methods of sFLC assessment were established...
January 4, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28181906/activity-of-urine-arylsulfatase-a-in-brain%C3%A2-dead-graft-donors-is-a-predictor-of-early-and-late-graft-function
#7
Ewa Kwiatkowska, Leszek Domanski, Joanna Bober, Krzysztof Safranow, Andrzej Pawlik, Kazimierz Ciechanowski
OBJECTIVE: Human lysosomal arylsulfatase A (ASA) is a member of the sulfatase family. Arylsulfatase A is required to degrade sulfatides. Sulfatides occur in the myelin sheets of the central and peripheral nervous system. In this study we evaluated the urine activity of lysosomal enzyme arylsulfatase A in brain‑dead donors as a marker and predictor of short - and long‑term renal allograft function. PATIENTS/METHODS: We analyzed data from kidney recipients who received organs from brain‑dead donors...
January 4, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28100855/trace-elements-as-an-activator-of-antioxidant-enzymes
#8
Marta Wołonciej, Elżbieta Milewska, Wiesława Roszkowska-Jakimiec
Oxidative stress is a state of impaired balance between the formation of free radicals and antioxidant capacity of the body. It causes many defects of the body, e.g. lipid peroxidation, DNA and protein damage. In order to prevent the effects of oxidative stress, the organism has developed defence mechanisms. These mechanisms capture and inhibit the formation of free radicals and also chelate ion metals that catalyse free radical reactions. Trace elements are components of antioxidant enzymes involved in antioxidant mechanisms...
December 31, 2016: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28100854/the-role-of-cancer-stem-cells-in-pathogenesis-of-colorectal-cancer
#9
Magdalena Szaryńska, Agata Olejniczak, Zbigniew Kmieć
Colorectal cancer (CRC) is the third most commonly diagnosed cancer, accounting for about 10% of total adult malignancies worldwide. The majority of CRC cases are diagnosed at the late stage; thus the investigation of the pathogenesis of early-stage disease and its detection could prevent formation of metastasis, a leading cause of death. This review highlights the recent progress in the understanding of the development of cancer stem cells (CSCs) in the colon epithelium and mechanisms of their proliferation...
December 31, 2016: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28100853/antioxidant-and-antimicrobial-properties-of-bioactive-phytochemicals-from-cranberry
#10
Monika Baranowska, Agnieszka Bartoszek
In the rational human diet, the important role of fruits and vegetables, which are a source of bioactive phytochemicals, is emphasized. Among fruits particular attention, due to a number of documented health-promoting properties, is focused on cranberry. This fruit is characterized by the high content of antioxidant phenolic compounds, which may support the natural antioxidant defense system of the body in the prevention of damage caused by oxidative stress induced by reactive oxygen species (ROS). Therefore, cranberry is suggested for the prevention of civilization diseases such as atherosclerosis, hypertension and cancer, whose etiology is associated directly with oxidative stress...
December 31, 2016: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28100852/allergenicity-of-milk-of-different-animal-species-in-relation-to-human-milk
#11
Robert Pastuszka, Joanna Barłowska, Zygmunt Litwińczuk
Protein content in cow milk (with over 20 proteins, and peptides may also occur as a result of enzymatic hydrolysis) ranges from 2.5% to 4.2% and is about 1.5-2 times higher than in human milk. Its most important allergens are considered to be β-lactoglobulin (absent in human milk) and αs1-casein. The most similar in composition to human milk is horse and donkey milk. It contains considerably more whey proteins (35-50%) than cow milk (about 20%), and the concentration of the most allergenic casein fraction αs1 is 1...
December 31, 2016: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28100851/effects-of-propofol-on-oxidative-stress-parameters-in-selected-parts-of-the-brain-in-a-rat-model-of-parkinson-disease
#12
Ewa Romuk, Wioletta Szczurek, Przemysław Nowak, Marta Skowron, Bernard Prudel, Edyta Hudziec, Ewa Chwalińska, Ewa Birkner
INTRODUCTION: Propofol is an intravenous sedative-hypnotic agent that is commonly used to induce and maintain general anaesthesia. This drug has antioxidant properties, which are partly caused by a phenolic structure similar to α-tocopherol. The present study aimed to evaluate the effect of propofol on the level of oxidative stress biomarkers in the frontal cortex, striatum, thalamus, hippocampus and cerebellum in rats with experimental Parkinson's disease (PD). MATERIAL/METHODS: The experiment was performed on 24 male Wistar rats assigned to the following groups: 1 - control; 2 - PD; 3 - PD with propofol...
December 31, 2016: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28100850/molecular-characteristic-and-physiological-role-of-dopa-decarboxylase
#13
Joanna Guenter, Robert Lenartowski
The enzyme DOPA decarboxylase (aromatic-L-amino-acid decarboxylase, DDC) plays an important role in the dopaminergic system and participates in the uptake and decarboxylation of amine precursors in the peripheral tissues. Apart from catecholamines, DDC catalyses the biosynthesis of serotonin and trace amines. It has been shown that the DDC amino acid sequence is highly evolutionarily conserved across many species. The activity of holoenzyme is regulated by stimulation/blockade of membrane receptors, phosphorylation of serine residues, and DDC interaction with regulatory proteins...
December 31, 2016: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28100849/the-role-genes-encoding-of-killer-cell-immunoglobulin-like-receptors-kirs-and-their-ligands-in-susceptibility-to-and-progression-of-hiv-infection
#14
Olga Błachowicz, Katarzyna Zwolińska
NK cells are a part of the innate antiviral response. Their activity is regulated by signals from the surface receptors. Some of them, known as killer cell immunoglobulin-like receptors (KIRs), determine the quality and intensity of the immunological response, together with their ligands (HLA class I). KIR genes are very polymorphic, and this is reflected in the NK activity modulation. The stimulation of NK cells, especially in the early stages of the infection, can reduce the transmission of HIV or slow down the progression of infection...
December 31, 2016: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28100848/influence-of-28-o-propynoylbetulin-on-proliferation-and-apoptosis-of-melanotic-and-amelanotic-human-melanoma-cells
#15
Anna Kaps, Ewa Chodurek, Arkadiusz Orchel, Marzena Jaworska-Kik, Ewa Bębenek, Stanisław Boryczka, Janusz Kasperczyk
INTRODUCTION: A relatively new approach in treatment of malignant melanoma is the use of betulin and its synthetic derivatives that have anticancer properties. The aim of the study was to determine the effect of an acetylenic derivative of betulin, 28-O-propynoylbetulin, on cell growth and apoptosis induction in human melanotic and amelanotic melanoma cells. MATERIALS AND METHODS: The A2058 and C32 cell lines were incubated with 28-O-propynoylbetulin (working solutions from 0...
December 31, 2016: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28100847/genetic-background-of-aberrant-thermogenin-expression-ucp1-in-obesity-leading-to-metabolic-syndrome
#16
Małgorzata Stosio, Agata Witkowicz, Anna Kowalska, Lidia Karabon
Cardiovascular and metabolic disturbances individually and interdependently lead to chronic pathological conditions observed in cardio-metabolic diseases (CMDs). In Europe, the morbidity and mortality caused by cardiovascular disease are the highest among all diseases. Therefore, it seems important to search for new and alternative therapies for obesity, which is the main cause of type 2 diabetes (T2D) and cardiovascular disease (CD). Great attention has been paid to the role of brown adipose tissue in fat burning and the possibility of transformation of the white adipose tissue to cells with brown adipose tissue function as a potential form of treatment of obesity...
December 31, 2016: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28100846/regulatory-lymphocytes-in-thyroid-orbitopathy-and-autoimmune-thyroid-diseases
#17
Marta Siomkajło, Jarosław Dybko, Jacek Daroszewski
Thyroid orbitopathy (OT), as an organ‑specific autoimmune disease, is a result of immune dysregulation leading to loss of control over inflammation directed against self‑antigens. The source of the autoreactive lymphocytes is the impairment of central tolerance as well as their induction on the periphery by modified or sequestered by that time antigens. Active suppression by the various subpopulations of regulatory lymphocytes (Lreg) acts as a counterbalance to the proinflammatory factors and is aimed at dampening pathological reaction...
December 31, 2016: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28100845/role-of-prometastatic-factors-in-gastric-cancer-development
#18
Marta Tkacz, Maciej Tarnowski, Marzena Staniszewska, Andrzej Pawlik
The second half of the 20th century has seen a sharp worldwide decline in both the incidence and mortality of gastric cancer. Despite this, gastric cancer is the most common cause of mortality in the world. It is closely related to the commonly asymptomatic course at the beginning and delayed diagnosis. Approximately 90‑97% of stomach cancers are adenocarcinomas, which may be subdivided histologically into two categories - intestinal type, and diffuse type. Cancer metastasis is a complex multi‑step process that is closely associated with tumor phenotype...
December 31, 2016: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28100844/phospholipids-and-products-of-their-hydrolysis-as-dietary-preventive-factors-for-civilization-diseases
#19
Karol Parchem, Agnieszka Bartoszek
The results of numerous epidemiological studies indicate that phospholipids play an important role in the prevention of chronic diseases faced by contemporary society. Firstly, these compounds are responsible for the proper functioning of cell membranes, by ensuring liquidity and permeability, which is pivotal for normal activity of membrane proteins, including receptors. These mechanisms are at the core of prevention of cancer, autoimmune or neurological disorders. Secondly, structure and properties of phospholipids cause that they are highly available source of biologically active fatty acids...
December 31, 2016: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28100843/pathophysiology-and-molecular-basis-of-selected-metabolic-abnormalities-in-huntington-s-disease
#20
Jolanta Krzysztoń-Russjan
Huntington's disease (HD) is an incurable, devastating neurodegenerative disease with a known genetic background and autosomally dominant inheritance pattern. HTT gene mutation (mHTT) is associated with polymorphic fragment elongation above 35 repeats of the CAG triplet. The mHTT product is an altered protein with a poly-Q elongated fragment, with the highest expression determined in the central nervous system (CNS) and with differentiated expression outside the CNS. A drastic loss of striatal and deeper layers of the cerebral cortex neurons was determined in the CNS, but muscle and body weight mass loss with dysfunction of many organs was also observed...
December 30, 2016: Postȩpy Higieny i Medycyny Doświadczalnej
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