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Tytuł:
Antioxidant, Anti-Tyrosinase, and Wound-Healing Capacities of Soy Protein Hydrolysates Obtained by Hydrolysis with Papaya and Cantaloupe Juices Showing Proteolytic Activity
Autorzy:
Nguyen, Thi-Phuong
Le, Quang T.
Tran, Mai Linh T.
Ta, Kim Nhung
Nguyen, Khoa T.
Powiązania:
https://bibliotekanauki.pl/articles/28408445.pdf
Data publikacji:
2024-01-22
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
antiradical activity
cantaloupe fruit
fibroblast model
degree of hydrolysis
papain
papaya fruit
soy protein isolate
tyrosinase inhibition
Opis:
Purified and crude proteases have been broadly applied to obtain hydrolysates from soy protein isolate (SPI) with the improved functional and biological properties. However, the use of fruit juices containing native proteases to produce SPI hydrolysates with better bioactivities receives less attention. The present study attempted to investigate the ability of papaya (Carica papaya) and cantaloupe (Cucumis melo) juices in the hydrolysis of SPI and assess the antioxidant, anti-tyrosinase, and wound-healing activities of obtained hydrolysates. Our analysis showed that SPI was hydrolysed by papaya juice, at the juice to substrate ratio of 2.5:2 (v/w), with a degree of hydrolysis (DH) of approximately 11% after 4 h of treatment at 55ºC. A higher DH (about 26%) was obtained by the hydrolysis with cantaloupe juice at the same juice to substrate ratio and treatment conditions. Papain used at the enzyme to substrate ratio of 0.625:2 (w/w) broke down SPI in a similar DH as papaya juice at the juice to substrate ratio of 2.5:2 (v/w). The ABTS•+-scavenging, OH-scavenging and tyrosinase inhibitory capacities of SPI were lower than those of hydrolysates obtained by the treatment with papaya juice (IC50 of 2.39, 7.17, and 32.07 μg/mL, respectively) and cantaloupe juice (IC50 of 2.46, 6.93, and 30.49 μg/mL, respectively). An enhancement in ABTS•+-scavenging, OH-scavenging and anti-tyrosinase activities was also observed in the hydrolysate obtained by papain (IC50 of 2.75, 17.85, and 117.80 μg/mL, respectively) compared to SPI. However, the increased level of the OH-scavenging capacity of the hydrolysate obtained by papain was lower than that of the fruit juice-treated samples. Remarkably, the hydrolysates prepared from the hydrolysis with fruit juices accelerated the wound closure in human fibroblasts by estimately 1.5 times after 24 h of treatment while this property was not observed in the hydrolysate by papain. Our study data suggest the potential of SPI hydrolysates obtained by papaya and cantaloupe juices in the preparation of healthy food products.
Źródło:
Polish Journal of Food and Nutrition Sciences; 2024, 74, 1; 5-15
1230-0322
2083-6007
Pojawia się w:
Polish Journal of Food and Nutrition Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Encapsulation of genistein in glycidylated G3 polyamidoamine dendrimers enables diffusion of genistein through biological membranes and anti-nematode activity of the encapsulate
Autorzy:
Filipowicz-Rachwał, Aleksandra
Drozdowska, Joanna
Zagórska-Dziok, Martyna
Uram, Łukasz
Wołowiec, Stanisław
Powiązania:
https://bibliotekanauki.pl/articles/40556674.pdf
Data publikacji:
2024-06-30
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
C. elegans
fibroblast BJ toxicity
genistein
keratinocyte HaCaT toxicity
PAMAM dendrimer
Opis:
Introduction and aim. Poorly soluble isoflavonoid genistein is known as an anti-nematode agent and also it decreases the risk of certain types of cancer. The biological activity of genistein is limited mostly by its low solubility. Therefore many attempts to increase genistein solubility in water were reported. We applied a polyamidoamine dendrimer, modified its surface by glycidylation, and used this macromolecule as a guest for genistein. Material and methods. Polyamidoamine dendrimer 3rd generation was substituted with 64 glycidol residues to obtain a macromolecule host for genistein. The stoichiometry of this host-guest complex was determined. The complex was tested for skin model permeability, toxicity on fibroblast (BJ) and keratinocyte (HaCaT) cell lines in vitro and anthelmintic activity on the Caenorhabditis elegans nematode. Results. The partition coefficient of genistein between octanol and water was determined (KO/W). The 1:1 host-guest complex was isolated and used as drug delivery system for genistein delivery. PAMAM G3 glycidyled dendrimer containing genistein indicated an anthelmintic activity at 50 μM concentration. Conclusion. The solubility of genistein in water increases 640 times in presence of an equimolar concentration of the dendrimer. One molecule of host dendrimer encapsulates 3 molecules of genistein. The encapsulate is an efficient anti-nematode formulation.
Źródło:
European Journal of Clinical and Experimental Medicine; 2024, 22, 2; 292-299
2544-2406
2544-1361
Pojawia się w:
European Journal of Clinical and Experimental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nichrome Capacitors on Polycarbonate Substrate for Monitoring Cell Culture Using Impedance Sensing Technique
Autorzy:
Kociubiński, A.
Zarzeczny, D.
Prendecka, M.
Pigoń, D.
Małecka-Massalska, T.
Powiązania:
https://bibliotekanauki.pl/articles/355589.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
bioimpedance
ecis
sputtering
nichrome
fibroblast
Opis:
The aim of this work was to present a method of tissue culture research by measuring the impedance of cells cultured in the presence of nichrome. For this purpose, the Electric Cell-substrate Impedance Sensing system was used with a prototype substrate containing comb capacitors made of nichrome. Magnetron sputtering, photolithography and etching processes were used to produce the thin-film electrodes. In the experimental part, cells of mouse fibroblast cell line L929 were cultured according to the instruction manual in complete medium, under controlled growth conditions. Inoculation of arrays was carried out by 300 microliters per well of cell suspension at ~1.2×105 cells/ml. The results of the monitoring cells behavior in tissue culture indicate good cell viability and proliferative potential.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 1; 493-496
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and in vitro anticancer activity of N-alkyl phosphoramidate monoesters of 3N-azido-3N-deoxythymidine (AZT)
Autorzy:
Czajkowska-Wojciechowska, E.
Singh, A.
Trznadel, R.
Ruszkowski, P.
Celewicz, L.
Powiązania:
https://bibliotekanauki.pl/articles/81295.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
anticancer activity
N-alkyl phosphoramidate monoester
3N-azido-3N-deoxythymidine
human cell line
cancer cell line
cervical cancer
HeLa cell line
KB cell
MCF-7 cell line
dermal fibroblast
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2019, 100, 1
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Relationships between serum selenium and zinc concentrations versus profibrotic and proangiogenic cytokines (FGF-19 and endoglin) in patients with alcoholic liver cirrhosis
Autorzy:
Prystupa, Andrzej
Kiciński, Paweł
Luchowska-Kocot, Dorota
Błażewicz, Anna
Kurys-Denis, Ewa
Niedziałek, Jarosław
Sak, Jarosław
Panasiuk, Lech
Powiązania:
https://bibliotekanauki.pl/articles/990858.pdf
Data publikacji:
2017
Wydawca:
Instytut Medycyny Wsi
Tematy:
liver cirrhosis
alcohol
selenium
zinc
fibroblast growth factor-19
endoglin
Opis:
Introduction and objective. Liver cirrhosis is a disease involving the liver parenchyma, which is characterised by fibrosis. and impaired architectonics of the parenchyma with regenerative nodules. The aim of the study was to determine the relationship between stage of alcoholic liver cirrhosis, concentrations of selenium, zinc and profibrotic and proangiogenic cytokines (FGF-19, ENG). Materials and method. The study included 99 patients with alcoholic cirrhosis and 20 healthy subjects. Ion chromatography with UV/VIS detection was used for determination of zinc ions in the previously mineralized serum samples. The measurements of selenium were performed with the ContrAA700 high-resolution continuum source graphite tube atomic absorption spectrometer. ELISA was used to determine concentration of FGF-19 and ENG in serum samples. Results. Concentrations of zinc and selenium were significantly decreased in cirrhotic patients (p<0.001 for both). The highest concentration of FGF-19 was found in Child-Pugh stage C liver cirrhosis patients (806.9±650.3 pg/ml), and was significantly higher than observed in controls (p=0.005) and stage A patients (compensated cirrhosis) (p=0.02). The highest concentration of ENG was demonstrated in the control group (3.24±148 ng/ml) while the lowest in patients with decompensated cirrhosis (7.32±5.39 ng/ml and 7.92±4.18 ng/ml for stage B and C; p=0.03 and p=0.02, respectively). The use of the multiple-variable model demonstrated that the independent factors affecting the concentration of ENG were the concentration of bilirubin (p=0.02), INR (p=0.01) and duration of alcohol abuse (p=0.02). The independent determinants of FGF-19 concentrations were found to be the stage (severity) of liver cirrhosis (p=0.04) and INR (p=0.03). Conclusions. Concentrations of zinc and selenium in serum of patients with alcoholic liver cirrhosis are not independently related to concentrations of FGF-19 and ENG.
Źródło:
Annals of Agricultural and Environmental Medicine; 2017, 24, 3
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of hydrazine derivatives of 3-formylchromones on angiogenic basic fibroblast growth factor and fibroblast growth factor receptor-1 in human melanoma cell line WM-115
Autorzy:
Łazarenkow, Andrzej
Michalska, Marta
Mirowski, Marek
Słomiak, Krzysztof
Nawrot-Modranka, Jolanta
Powiązania:
https://bibliotekanauki.pl/articles/1038629.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
angiogenesis
basic fibroblast growth factor
fibroblast growth factor receptor 1
human melanoma
hydrazone derivatives of benzo-γ-pyrones
Opis:
The hydrazine derivatives of benzopyrones remain an unexplored group of chemical compounds. This preliminary study investigates the influence of A-5, CH-3 and K-2 derivatives at concentrations of 1, 10, 100 nM and 1 μM on selected biochemical factors of a melanoma cell line WM-115, with regard to their potential angiogenic properties. The studied compounds were found to influence cell proliferation, as well as total protein, bFGF and FGFR1 concentration.
Źródło:
Acta Biochimica Polonica; 2017, 64, 3; 585-590
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of selective COX-2 inhibitor on phase of healing surgical wounds: proliferation and secretion of bFGF by endothelial cells
Autorzy:
Jasiak, Łukasz
Kowalczyk, Mateusz
Mazan, Paula
Kowalczyk, Edward
Sienkiewicz, Monika
Jóźwiak-Bębnista, Marta
Wiktorowska-Owczarek, Anna
Powiązania:
https://bibliotekanauki.pl/articles/763865.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
angiogenesis, selective COX-2 inhibitor, fibroblast growth factor, vascular endothelial cell
Opis:
The process of wound healing consists of the following phases: inflammation, proliferation, remodeling. Non-steroidal antiinflammatory drugs may be important in this process, especially in a stage called angiogenesis. For this reason, it was decided to investigate the effect of selective COX-2 (cyclooxygenase 2) inhibitor (NS-398) on the proliferation of endothelial cells and their ability to secrete bFGF (fibroblast growth factor) for vascular endothelial cells (HMEC-1). For determination of the secretion of bFGF in a cell line HMEC-1 immunosorbent ELISA assays were used. In turn, the cell proliferation assay was performed using the MTT method. Using MTT method, it was found that NS-398 at 10 μM did not affect cell viability. Whereas selective COX-2 inhibitor at 100 μM decreased cell viability in a statistically significant manner and inhibited the proliferative effect of 100 μg/mL LPS at concentrations of 10 and 100 μM. In the further step, application of NS-398 (10 and 100 μM) with LPS (100 μg/mL; inflammatory environment) reduced the secretion of bFGF in a statistically significant manner. The investigations showed that NS-398 has an antiangiogenic effect which is based on reducing the proliferation of vascular endothelial cells and inhibiting the secretion of bFGF- factor responsible for angiogenesis during wound healing.
Źródło:
Annales Universitatis Mariae Curie-Sklodowska, sectio C – Biologia; 2017, 72, 1
2083-3563
0066-2232
Pojawia się w:
Annales Universitatis Mariae Curie-Sklodowska, sectio C – Biologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The potential impact of the hypovitaminosis D on metabolic complications in obese adolescents - preliminary results
Autorzy:
Wójcik, Małgorzata
Janus, Dominika
Kalicka-Kasperczyk, Anna
Sztefko, Krystyna
Starzyk, Jerzy B.
Powiązania:
https://bibliotekanauki.pl/articles/986678.pdf
Data publikacji:
2017
Wydawca:
Instytut Medycyny Wsi
Tematy:
obesity
hypovitaminosis d
uric acid
arterial hypertension
fibroblast growth factor 23
fibroblast growth factor 19
adolescents
Opis:
Introduction and objective. Vitamin D deficiency is common in obesity; however, its contribution in the development of metabolic complications remains uncertain. The aim of the study was to examine the relationships between vitamin D status and metabolic complications. Materials and method. The results of blood pressure measurements, biochemical tests and ultrasound of the liver were compared in both groups. The study was conducted at the Children’s University Hospital in Krakow, Poland. 30 obese adolescents (mean 13.23y.o.); 18 with 25OHD levels <20ng/mL, 12 with 25OHD>20 ng/mL. Results. The vitamin D deficient group presented with significantly higher values of the diastolic blood pressure (125.9vs.115mmHg), uric acid level (384.7vs.301.5umol/L) and lower phosphorus level (1.4vs.1.65mmol/L), higher prevalence of arterial hypertension (44vs.8.3%), and liver steatosis (25vs.8.3%); lower, but not significantly, levels of fibroblast growth factor 23 and fibroblast growth factor 19. Conclusions. Hypovitaminosis D in obese adolescents is associated with higher prevalence of arterial hypertension, liver steatosis, elevated serum uric acid and low phosphorus levels. The potential contribution of the fibroblast growth factor 23 and fibroblast growth factor 19 in these complications development needs further investigation.
Źródło:
Annals of Agricultural and Environmental Medicine; 2017, 24, 4
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hepatokines and non-alcoholic fatty liver disease
Autorzy:
Lebensztejn, Dariusz
Flisiak-Jackiewicz, Marta
Białokoz-Kalinowska, Irena
Bobrus-Chociej, Anna
Kowalska, Irina
Powiązania:
https://bibliotekanauki.pl/articles/1038763.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
non-alcoholic fatty liver disease
fetuin-A
fibroblast growth factor-21
selenoprotein P
sex hormone-binding globulin
angiopoietin-related growth factor
leukocyte derived chemotaxin 2
Opis:
Nowadays non-alcoholic fatty liver disease (NAFLD) is becoming the most common chronic liver pathology both in adults and children. NAFLD manifestation ranges from a simple liver steatosis to steatohepatitis (nonalcoholic steatohepatitis - NASH), which may progress to advanced fibrosis, cirrhosis and end-stage liver disease. Due to the coexistence of visceral obesity, insulin resistance and dyslipidemia, NAFLD is considered to be the hepatic manifestation of metabolic syndrome. In recent years, in the pathogenesis of metabolic syndrome, type 2 diabetes mellitus, cardiovascular disease and also NAFLD, more and more attention has been paid to the so-called organokines, proteins with both paracrine or/and endocrine activities. These include most known adipokines (mainly produced by adipose tissue), myokines (mainly produced by skeletal muscles) and hepatokines exclusively or predominantly produced by the liver. It was shown that the liver may affect the lipids and glucose metabolism by hepatokines released into the blood and NAFLD seems to be associated with altered hepatokines production. Fetuin-A, fibroblast growth factor-21 (FGF-21), selenoprotein P, sex hormone-binding globulin (SHBG), angiopoietin-related growth factor (also known as angiopoietin-related protein 6) and leukocyte derived chemotaxin 2 (LECT2) are considered as the most important hepatokines. In this review, we provide an overview of the main hepatokines and we summarize the association of liver-derived proteins with the development and progression of NAFLD.
Źródło:
Acta Biochimica Polonica; 2016, 63, 3; 459-467
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pentoxifylline and its active metabolite lisofylline attenuate transforming growth factor β1-induced asthmatic bronchial fibroblast-to-myofibroblast transition
Autorzy:
Wójcik-Pszczoła, Katarzyna
Hińcza, Kinga
Wnuk, Dawid
Kądziołka, Dominika
Koczurkiewicz, Paulina
Sanak, Marek
Madeja, Zbigniew
Pękala, Elżbieta
Michalik, Marta
Powiązania:
https://bibliotekanauki.pl/articles/1038759.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
theophylline
pentoxifylline
lisofylline
transforming growth factor type β
fibroblast-to-myofibroblast transition
asthma
Opis:
Bronchial asthma is characterized by persistent airway inflammation and airway wall remodeling. Among many different cells and growth factors triggering changes in bronchi structure, transforming growth factor β1-induced fibroblast to myofibroblast transition is believed to be very important. The aim of this study was to evaluate whether theophylline (used in asthma therapy) and two other methylxanthines (pentoxifylline and its active metabolite lisofylline), may affect transforming growth factor β1-induced fibroblast to myofibroblast transition in bronchial fibroblasts derived from asthmatic patients. We show here for the first time that selected methylxanthines effectively reduce transforming growth factor β1-induced myofibroblast formation in asthmatic bronchial fibroblast populations. PTX was found to be the most effective methylxanthine. The number of differentiated myofibroblasts after PTX, LSF and THEO administration was reduced at least twofold. Studies on the use of methylxanthines opens a new perspective in the development of novel strategies in asthma therapy through their two-pronged, anti-inflammatory and anti-fibrotic action. In the future they can be considered as promising anti-fibrotic drugs.
Źródło:
Acta Biochimica Polonica; 2016, 63, 3; 437-442
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Expression of RUNX2 and its signaling partners TCF7, FGFR1/2 in cleidocranial dysplasia
Autorzy:
Pawłowska, Elżbieta
Wójcik, Katarzyna
Synowiec, Ewelina
Szczepańska, Joanna
Błasiak, Janusz
Powiązania:
https://bibliotekanauki.pl/articles/1039147.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
RUNX2
Wnt signaling
TCF7
fibroblast growth factor signaling
FGFR1
FGFR2
Opis:
RUNX2 is a member of the PEBP2/CBF transcription factors family controlling the expression of genes whose products are essential for bone formation. Mutations in the RUNX2 gene may be associated with cleidocranial dysplasia (CCD), a rare skeletal disease characterized by stature aberrations, delayed closure of the cranial sutures, hypoplastic or aplastic clavicles, and multiple dental abnormalities. As RUNX2 is involved in many signaling pathways, we hypothesize that CCD may be associated with their changes. We determined the expression of RUNX2 and its signaling partners TCF7, involved in canonical Wnt signaling, and fibroblast growth factor receptors, FGFR1 and FGFR2 in periodontum of CCD patients and control individuals. We did not observe any differences between the level of RUNX2, TCF7 and FGFR1/2 mRNA, determined by real-time PCR, in CDD patients and controls. Therefore, RUNX2 signaling pathways with their partners TCF7 and FGFR1/2 may not be involved in CCD pathogenesis.
Źródło:
Acta Biochimica Polonica; 2015, 62, 1; 123-126
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Obtainment of transgenic porcine fibroblast cell lines for the purpose of xenotransplantation
Autorzy:
Hryhorowicz, M.
Nowak, A.
Grzeskowiak, B.
Zeyland, J.
Slomski, R.
Lipinski, D.
Powiązania:
https://bibliotekanauki.pl/articles/951232.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
conference
pig
xenotransplantation
porcine fibroblast
cell line
interspecies somatic cell nuclear transfer
genetic modification
transgene expression
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2015, 96, 1
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pseudophysiological transcomplementary activation of reconstructed oocytes as a highly efficient method used for producing nuclear-transferred pig embryos originating from transgenic foetal fibroblast cells
Autorzy:
Samiec, M.
Skrzyszowska, M.
Lipinski, D.
Powiązania:
https://bibliotekanauki.pl/articles/32261.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
pseudophysiological activation
oocyte
reconstructed oocyte
nuclear-transferred embryo
pig
embryo
transgenic cell
fetal cell
fibroblast cell
preimplantation development
preimplantation development zob.tez embryonic development
cell cloning
Opis:
The completely new strategy of pseudophysiological transcomplementary (transcytoplasmic) activation (PP-TCA) of nuclear-transferred oocytes, which had been derived from pWAPhGH-GFPBsd transfected foetal fibroblast cells, was recently applied to the somatic cell cloning of pigs. It resulted in the considerable enhancing not only the cleavage activity of cultured cloned embryos, but also their morula and blastocyst formation rates as compared to the use of standard simultaneous fusion and electrical activation of reconstituted oocytes (77% vs. 57%, 63% vs. 46% and 40% vs. 27%, respectively). Altogether, the use of cytosolic components descended from heterologous (rabbit) zygotes as the agents for stimulation of porcine clonal cytoplasmic hybrids (cybrids) turned out to be reliable and feasible strategy for the generation of transgenic blastocysts by somatic cell nuclear transfer (SCNT). Furthermore, to our knowledge, no previous study has reported the preimplantation developmental outcome of transgenic nuclear-transferred pig embryos following the PP-TCA that was developed and optimised in our laboratory.
Źródło:
Polish Journal of Veterinary Sciences; 2012, 15, 3
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Struktura i funkcje białka Klotho
Structure and functions of Klotho protein
Autorzy:
Szymczak, Agnieszka
Forma, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/1032793.pdf
Data publikacji:
2012
Wydawca:
Łódzkie Towarzystwo Naukowe
Tematy:
białko klotho
trpv
wapń
fosfor
witamina d
czynniki
wzrostu fibroblastów
nowotwory
klotho protein
calcium
phosphorus
vitamin d
fibroblast
growth factors
neoplasms
Opis:
Klotho gene was identified in 1997, and named after a Greek goddess Klotho, who spun the thread of life. The inactivation of Klotho gene in mice leads to a syndrome resembling aging, whereas the overexpression of Klotho extends their life span. Protein Klotho exists in two forms: membrane and secreted Klotho which play different functions. The highest expression of transmembrane form of Klotho is observed in the kidney and choroid plexus in the brain. The transmembran form of Klotho acts as a coreceptor for fibroblast growth factor 23 (FGF23) and regulates phosphate homeostasis band vitamin D metabolism. The secreted form of Klotho, which was detected in plasma, cerebrospinal fluid and urine functions as a humoral factor that regulates the activity of several ion channels, transporters, and growth factor receptors. Moreover, this form of Klotho protein can modify N-glycans of TRPV5 channel and regulate calcium homeostasis. The secreted Klotho can also inhibit the insulin and insulin-like growth factor 1 (IGF-1) pathways. Last data suggest that Klotho can act as a tumor supressor gene. The decrease of Klotho expression was observed in the breast, pancreas, stomach, colon, lung and cervical cancer. Moreover, the decrease of Klotho expression was correlated with the more aggressive phenotype of examined cancers. Downregulation of Klotho gene was associated with CpG hypermethylation of promoter region and histones deacetylation.
Gen Klotho, odkryty został w roku 1997, a jego nazwa wywodzi się od imienia greckiej bogini Klotho, która przędła nić ludzkiego żywota. Myszy z inaktywowanym genem Klotho wykazują cechy przedwczesnego starzenia się, natomiast nadekspresja Klotho skutkuje wydłużeniem czasu ich życia. Białko Klotho występuje w dwóch formach - transbłonowej oraz sekrecyjnej, którym przypisuje się odmienne funkcje. Najwyższą ekspresję transbłonowej formy Klotho obserwuje się w nerkach i splotach naczyniówkowych komór mózgowych. Forma ta, funkcjonuje jako koreceptor dla czynnika wzrostu fibroblastów 23 (FGF23), który uczestniczy w utrzymywaniu homeostazy fosforanowej oraz regulacji metabolizmu witaminy D. Sekrecyjna postać białka, której obecność wykazano w osoczu, płynie mózgowordzeniowym oraz w moczu, funkcjonuje jako czynnik humoralny. Reguluje ona aktywność kanałów jonowych, transporterów błonowych, a także receptorów dla czynników wzrostu. Poprzez modyfikację N-glikanów kanałów TRPV5, Klotho sekrecyjne bierze udział w utrzymywaniu homeostazy jonów wapnia. Ponadto, sekrecyjna postać białka uczestniczy w hamowaniu szlaku insuliny/insulinopodobnego czynnika wzrostu. Ostatnie doniesienia sugerują, iż Klotho spełnia także rolę supresora procesu nowotworzenia. Obniżenie ekspresji genu Klotho wykazano m.in. w raku piersi, trzustki, żołądka, jelita grubego, płuc oraz w raku szyjki macicy. Spadek ekspresji genu Klotho skorelowany jest z bardziej agresywnym fenotypem badanych nowotworów. Wśród mechanizmów leżących u podstaw obniżenia ekspresji Klotho wyróżnia się m.in. hipermetylację wysp CpG w obrębie regionu promotorowego oraz deacetylację histonów.
Źródło:
Folia Medica Lodziensia; 2012, 39, 2; 151-187
0071-6731
Pojawia się w:
Folia Medica Lodziensia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary evaluation of selected biologic properties of TiO2 and SiO2 layers on metallic substrates
Autorzy:
Urbański, W.
Dragan, S.
Gębarowska, E.
Dzięgiel, P.
Krzak-Roś, J.
Miller, M.
Pezowicz, C.
Będziński, R.
Powiązania:
https://bibliotekanauki.pl/articles/284506.pdf
Data publikacji:
2010
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
sol-gel coating
fibroblast
cytotoxicity
orthopaedic implant
Opis:
Despite of applying modern biomaterials during constructing long term orthopaedic implants, in clinical practice there are still present wide range of complications, particularly concerning matter of implant - tissue interactions. Since interaction between implant and living tissue depends mainly on biomaterial surface features, we decided to modify orthopaedic alloys to improve their biological properties. The object of this experiment was in vitro evaluation of selected biological properties, particularly cytotoxicity of titanium alloy and 316L stainless steel substrates coated with SiO2 or TiO2 thin films. The coatings were synthesized by sol-gel method. Each samples was placed into mouse fibroblast culture. The cultures in presence of tested materials were maintained for three days. We found no distinct toxic effect of tested biomaterials. We noticed increase of fibroblast proliferation in cultures with uncoated titanium and particularly SiO2 coated titanium plates.
Źródło:
Engineering of Biomaterials; 2010, 13, no. 96-98; 129-133
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł

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