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Postȩpy Higieny i Medycyny Doświadczalnej

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https://www.readbyqxmd.com/read/28513466/non-small-cell-lung-cancer-mutations-targeted-and-combination-therapy
#1
Justyna Kutkowska, Irena Porębska, Andrzej Rapak
Year after year, a growing number of cases of non-small cell lung cancer (NSCLC), mostly caused by smoking, have been noted. Most patients die because of the late detection of cancer and tumor resistance to treatment with cytostatics. Treatment of patients with advanced NSCLC is impeded by the low sensitivity of the tumor to cytostatic agents and the co-existence of many diseases, which substrate is, like lung cancer, cigarette smoking. Along with the development of molecular biology, targeted therapy has started to be used, affecting specific signaling pathways involved in the processes of oncogenesis...
May 17, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28513465/the-role-of-srsf1-in-cancer
#2
Elżbieta Sokół, Joanna Bogusławska, Agnieszka Piekiełko-Witkowska
SRSF1 jest wielofunkcyjnym białkiem biorącym udział w procesach związanych z metabolizmem RNA. Następstwem zaburzeń ekspresji SRSF1, obserwowanych w wielu typach nowotworów, są nieprawidłowości w składaniu pre-mRNA, zmiany stabilności transkryptów i poziomu translacji onkogenów oraz genów supresorowych. Regulując różnicowe składanie transkryptów genów CCND1, RAC1, KLF6, BCL2L1, MCL1 oraz CASP9, SRSF1 indukuje zmiany w cyklu komórkowym, proliferacji i apoptozie. Czynnik SRSF1 wpływa także na angiogenezę nowotworową i przerzutowanie, m...
May 17, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28513463/alzheimer-s-disease-against-peptides-products-of-enzymatic-cleavage-app-protein-biological-pathobiological-and-physico-chemical-properties-of-fibrillating-peptides
#3
Małgorzata Marszałek
Various peptides products of enzymatic cleavage of key for Alzheimer's disease Amyloid Precursor Protein (APP) are well known, but still are matter of scientific debate. The Aβ type products are especially challenging for experimental and medical research. This paper outlines several, still poorly known, biological and medical processes such as peptides biology, i.e., formation, biodistribution, translocation, transport and finally removal from brain compartments and body fluids like Intracellular Fluid (ICF), Cerebrospinal Fluid (CSF), Interstitial Fluid (ISF), blood serum or urine...
May 17, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28513464/pharmacological-features-of-osthole
#4
Agata Jarząb, Aneta Grabarska, Krystyna Skalicka-Woźniak, Andrzej Stepulak
Coumarins are a group of naturally occurring compounds common in the plant world. These substances and their derivatives exhibit a broad range of biological activities. One of the naturally occurring coumarins is osthole, which can most frequently be found in plants of the Apiaceae family. Cnidium monnieri (L.) Cusson ex Juss. Angelica pubescens Maxim. and Peucedanum ostruthium (L.). It has anti-proliferative, anti-inflammatory, anti-convulsant, and antiallergic properties; apart from that, inhibition of platelet aggregation has also been proved...
May 15, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28513462/invasion-and-metastasis-of-tumour-cells-resistant-to-chemotherapy
#5
Anna Nowakowska, Jolanta Tarasiuk
Metastatic tumours resistant to chemotherapy are the major cause of the clinical failure in the treatment of malignant diseases. It is observed often that drugs active against primary tumours do not exhibit the same efficacy towards metastatic tumour cells having modified signaling pathways. Among cellular factors involved in the development of the metastatic potential of multidrug resistant tumour cells are some oncoproteins, antiapoptotic proteins, mutated suppressor proteins, integrins and CD44 receptor...
May 9, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28513461/the-importance-of-bordetella-pertussis-strains-which-do-not-produce-virulence-factors-in-the-epidemiology-of-pertussis
#6
Maciej Polak, Anna Lutyńska
Bordetella pertussis strains, which have lost the ability to produce antigens, such as pertactin - Prn, pertussis toxin - Ptx, filamentous haemagglutinin - FHA, fimbriae type 2 and 3 - Fim 2 and 3, tracheal colonization factor - TcfA, have recently been isolated in countries with a high vaccination coverage. The emergence of such isolates might have resulted from B. pertussis natural evolution course or adaptive mechanisms, allowing increased circulation of the pathogen in vaccinated populations. So far, the majority of described mutants were deficient in the Prn production...
May 9, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28513460/the-role-of-oxidative-stress-in-female-infertility-and-in-vitro-fertilization
#7
Joanna Wojsiat, Jerzy Korczyński, Marta Borowiecka, Halina Małgorzata Żbikowska
Infertility problem involves many couples of reproductive age. It has been estimated that in Poland 0.7-1.0 million pairs require treatment, while for more than half of them assisted reproduction is the only recommended and effective method. Infertility affects 13 to 15% of the world's population. A major concern is the age-related decline in female fertility even more that often a decision about pregnancy is taken at later age. Recent studies show that increased production of reactive oxygen species is an important factor in etiopathogenesis of pregnancy and affects female reproduction...
May 9, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28513459/effects-of-granulocyte-colony-stimulating-factor-on-opsonin-receptor-expression-and-neutrophil-antibacterial-activity-in-a-mouse-model-of-severe-acute-pancreatitis
#8
Tuo Hong-Fang, Peng Yan-Hui, Bao Lei, Zhang Wan-Xing
The antimicrobial function of neutrophils, which is dependent on opsonin receptors, deteriorates in severe acute pancreatitis (SAP). Granulocyte colony-stimulating factor (G-CSF) putatively enhanced levels of the opsonin receptors CD11b and CD32/16 in healthy human subjects, and provided protection against infection in animal models of SAP. A statistically convincing study of the effect of G-CSF on CD32/16 expression in an SAP model is lacking. We used a mouse model of SAP to investigate the association between G-CSF administration and CD32/16 levels on neutrophils and bacterial translocation...
May 9, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28513458/cofilin-a-protein-controlling-dynamics-of-actin-filaments
#9
Zofia Ostrowska, Joanna Moraczewska
Cofilins are evolutionary conserved proteins present in all Eukaryotic cells. Their primary function is dynamic reorganization of actin cytoskeleton. Two cofilin isoforms are known: cofilin 1, present in all studied non-muscle cells and in embryonic muscle cells, and cofilin 2, which dominates in mature skeletal and cardiac muscles. Polypeptide chains of both isoforms fold into a structure homological to a conservative ADF (actin depolymerizing factor) domain, which is characteristic of actin depolymerizing factor...
May 5, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28513457/bacteriocins-from-lactic-acid-bacteria-as-an-alternative-to-antibiotics
#10
Aleksandra Ołdak, Dorota Zielińska
Bacteriocins are ribosomally synthesized, proteinaceous substances that inhibit the growth of closely related species through numerous mechanisms. The classification system used in this review divided bacteriocins into four sub-groups based on their size. Currently, there is extensive research focused on bacteriocins and their usage as a food preservative. The increasing incidence of multidrug resistant bacterial pathogens is one of the most pressing medical problems in recent years. Recently, the potential clinical application of LAB (Lactic Acid Bacteria) bacteriocin has been the subject of investigations by many scientists...
May 5, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28513456/aflatoxins-characteristics-and-impact-on-human-health
#11
Anna Kowalska, Katarzyna Walkiewicz, Paweł Kozieł, Małgorzata Muc-Wierzgoń
Some molds commonly occurring in the natural environment produce mycotoxins in the process of secondary metabolism. Aspergillus flavus and A. parasiticus are species of molds, which are responsible for the production of aflatoxins and are crucial in the pathogenesis of human diseases. Aspergillus species present in decaying plants, the soil and their spores are transferred via air currents and insects to crops and food storages. Aflatoxins B1, B2, G1, G2, M1 and M2 are the most common derivatives of aflatoxins...
May 5, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28513455/glucose-tolerance-disorders-during-treatment-with-glucocorticoids-in-patients-with-inflammatory-diseases-of-the-musculoskeletal-system-based-on-the-analysis-of-data-from-the-literature-and-own-research-results
#12
Piotr Dąbrowski, Maria Majdan
Glucocorticoids are among the most frequently used anti-inflammatory and immunosuppressive drugs. They are widely used in the treatment of numerous autoimmune disorders. However, the treatment with glucocorticoids is connected with the risk of a number of side effects. Among them, glucose tolerance disorders play an important role. The results of meta-analyses show that the risk of diabetes is from 1.4 to 2.5 times higher in the case of treated patients in comparison to the general population. Glucocorticoids can directly impair pancreatic β-cell secretion...
May 4, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28513454/lysosomal-dysfunction-in-neurodegenerative-diseases
#13
Klaudia Tomala, Bożena Gabryel
Dane literaturowe z ostatnich lat jednoznacznie wskazują na udział lizosomów w programowanej śmierci komórki. Dysfunkcje lizosomów upośledzają fuzję autofagosomów z lizosomami, co prowadzi do wakuolizacji cytoplazmy. Obecność wakuoli autofagalnych obładowanych uszkodzonymi organellami i nieprawidłowymi białkami jest cechą charakterystyczną wielu chorób neurodegeneracyjnych. Agregacja niezdegradowanego materiału zaburza homeostazę komórki powodując śmierć neuronu w wyniku apoptozy i/lub nekrozy...
May 4, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28402255/chemotherapy-and-plasma-adipokines-level-in-patients-with-colorectal-cancer
#14
Grzegorz Słomian, Elżbieta Świętochowska, Grzegorz Nowak, Krystyna Pawlas, Aleksandra Żelazko, Przemysław Nowak
Adipokines are molecules produced and secreted by adipose tissue and are linked to multiple malignancies. Adipokines can suppress or promote particular cell behaviors in different types of cancer. The aim of this study was to investigate the impact of chemotherapy on select adipokines in patients with colorectal cancer (CRC). Blood samples were collected from 42 patients with pathologically documented advanced CRC, who required palliative chemotherapy. Leptin, adiponectin, resistin and visfatin levels were measured by ELISA before and 3 months after the administration of chemotherapy...
April 12, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28402254/vegetables-and-fruit-as-a-source-of-bioactive-substances-and-impact-on-memory-and-cognitive-function-of-elderly
#15
Monika A Zielińska, Agata Białecka, Barbara Pietruszka, Jadwiga Hamułka
The phenomenon of population aging is not only associated with an increase in the number and proportion of older people in society, but also with an increase in the incidence of cognitive impairment. This can impair the functioning of the elderly in everyday life, work and social life participation and impair their quality of life. Hence, it is important to identify the protective factors. Neurodegenerative changes are closely linked to inflammatory processes and oxidative stress. Diet is of great importance, with particular attention being paid to the adequate intake of fruits and vegetables, due to their proven health benefits...
April 12, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28402253/immunoregulatory-role-of-b-lymphocytes-in-alloresponse-to-kidney-transplant
#16
Tomasz Baran, Maria Boratyńska
B cells are a group of diverse phenotype and function subsets, which can both stimulate and inhibit the immune response to an allograft. They participate in the rejection process by influencing differentiation, proliferation and effector functions of T lymphocytes. B cells injure the graft via the ADCC (antibody-dependent cellular cytotoxicity) reaction and humoral rejection through plasmocyte production of donor-specific antibodies. A converse, suppressive mode of B cells can attribute to the development of tolerance and protect the graft from rejection...
April 12, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28397705/the-use-of-selected-neutrophil-protein-plasma-concentrations-in-the-diagnosis-of-crohn-s-disease-and-ulcerative-colitis-a-preliminary-report
#17
Dorota Pawlica-Gosiewska, Bogdan Solnica, Katarzyna Gawlik, Dorota Cibor, Tomasz Mach, Danuta Fedak, Danuta Owczarek
BACKGROUND: Difficulties in diagnosis of inflammatory bowel disease (IBD) motivate the search for new diagnostic tools, including laboratory tests. The aim of this study was to evaluate concentrations of the neutrophil (NEU) proteins leukocyte elastase (HLE-α1AT), lactoferrin and calprotectin as potential biomarkers used in the diagnosis and assessment of clinical activity of Crohn's disease (CD) and ulcerative colitis (UC). MATERIAL/METHODS: The study included 27 patients with CD, 33 patients with UC and 20 healthy controls...
April 6, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28397704/the-influence-of-tsa-and-vpa-on-the-in-vitro-differentiation-of-bone-marrow-mesenchymal-stem-cells-into-neuronal-lineage-cells-gene-expression-studies
#18
Anna Fila-Danilow, Paulina Borkowska, Monika Paul-Samojedny, Malgorzata Kowalczyk, Jan Kowalski
INTRODUCTION: Epigenetic mechanisms regulate the transcription of genes, which can affect the differentiation of MSCs. The aim of the current work is to determine how the histone deacetylase inhibitors TSA and VPA affect the expression of neuronal lineage genes in a culture of rat MSCs (rMSCs). MATERIALS AND METHODS: We analyzed the expression of early neuron marker gene (Tubb3), mature neuron markers genes (Vacht, Th, Htr2a) and the oligodendrocyte progenitor marker gene (GalC)...
March 27, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28345531/polyphenols-in-preventing-endothelial-dysfunction
#19
Sylwia Biegańska-Hensoldt, Danuta Rosołowska-Huszcz
One of the main causes of mortality in developed countries is atherosclerosis. The pathogenesis of atherosclerosis is associated with endothelial dysfunction. Consumption of food rich in natural antioxidants including polyphenols significantly improves endothelial cells functions. Polyphenols have a beneficial effect on the human body and play an important part in protecting the cardiovascular system. Polyphenols present in food have antioxidant, anti-inflammatory, antihypertensive, antithrombotic and antiproliferative properties...
March 27, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28345530/fecal-microbiota-transplantation-methods-of-treatment-of-recurrent-clostridium-difficile-infections-and-other-diseases
#20
Klaudia Juszczuk, Katarzyna Grudlewska, Agnieszka Mikucka, Eugenia Gospodarek
Clostridium difficile is a serious epidemiological problem and particularly dangerous microorganism causing hospital infections. Currently, the treatment of C. difficile infections is the use of metronidazole or vancomycin. However, in some patients, recurrent infection difficult to treat occurs. Fecal microbiota transplantation (FMT) is a new method used to treat the recurrent CDI. FMT consists in the infusion of the fecal suspension from a healthy donor into the gastrointestinal tract of a patient with CDI to restore the natural intestinal microflora...
March 27, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
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