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Wyszukujesz frazę "glycoconjugates" wg kryterium: Temat


Wyświetlanie 1-9 z 9
Tytuł:
Engineered atenolol-glycoconjugates to target H9c2 cardiomyocyte cell lines
Autorzy:
Kumbha, Smita Tukaram
Bhatia, Manish Sudesh
Patil, Shitalkumar Shivgonda
Tematy:
glycoconjugates
atenolol
targeting
glikokoniugaty
Pokaż więcej
Wydawca:
Centrum Badań i Innowacji Pro-Akademia
Powiązania:
https://bibliotekanauki.pl/articles/2142859.pdf  Link otwiera się w nowym oknie
Opis:
Background: One of the most important fields of biomedical engineering study nowadays is targeted drug delivery to specific cells. A drug's therapeutic efficacy can be improved and optimised by tightly targeting it to a pathophysiologically essential tissue architecture. The goal of this research is to develop saccharide conjugates for the targeted delivery of Atenolol, a -blocker. Methods: Galactose (monosaccharide), pectin (polysaccharide), and chitosan were chosen as the saccharides (polysaccharide). By grafting Atenolol with the modified saccharides, the conjugates were created. Spectroscopic and thermal studies were used to describe the chemically changed saccharides conjugates. H9c2 cell lines were used to conduct drug release research and cellular uptake studies. To investigate cytotoxicity, a brine shrimp lethality test was done. Results: The outcomes exhibit that Atenolol-modified saccharide conjugates can productively convey the medication to the target. Conclusion: It can be inferred that the improvement of saccharide-drug conjugates can be a compelling methodology for targeting cardiovascular medication.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization of bovine serum albumin glycated with glucose, galactose and lactose
Autorzy:
Ledesma-Osuna, Ana
Ramos-Clamont, Gabriela
Vázquez-Moreno, Luz
Tematy:
bovine serum albumin glycoconjugates
Maillard reaction
glycation
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Wydawca:
Polskie Towarzystwo Biochemiczne
Powiązania:
https://bibliotekanauki.pl/articles/1040702.pdf  Link otwiera się w nowym oknie
Opis:
The non-enzymatic reaction between reducing sugars and proteins, known as glycation, has received increased attention from nutritional and medical research. In addition, there is a large interest in obtaining glycoconjugates of pure well-characterized oligosaccharides for biological research. In this study, glycation of bovine serum albumin (BSA) by d-glucose, d-galactose and d-lactose under dry-heat at 60°C for 30, 60, 120, 180 or 240 min was assessed and the glycated products studied in order to establish their biological recognition by lectins. BSA glycation was monitored using gel electrophoresis, determination of available amino groups and lectin binding assays. The BSA molecular mass increase and glycation sites were investigated by mass spectrometry and through digestion with trypsin and chymotrypsin. Depending on time and type of sugar, differences in BSA conjugation were achieved. Modified BSA revealed reduction of amino groups' availability and slower migration through SDS/PAGE. d-galactose was more reactive than d-glucose or d-lactose, leading to the coupling of 10, 3 and 1 sugar residues, respectively, after 120 minutes of reaction. BSA lysines (K) were the preferred modified amino acids; both K256 and K420 appeared the most available for conjugation. Only BSA-lactose showed biological recognition by specific lectins.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Circadian changes in expression of of glycoconjugates in goblet cells of the ileum of mice fed at night under constant light.
Okołodobowe zmiany ekspresji glikokoniugatów w komórkach kubkowych jelita krętego myszy karmionych w nocy w warunkach stałego światła.
Autorzy:
Ziemiańska, Sylwia
Opis:
Rytmy występujące u żywych organizmów są kontrolowane przez zegar biologiczny, ulokowany w jądrach nadskrzyżowaniowych (SCN). W wyniku wielu badaniach wykazano, że istnieją także zegary peryferyczne, takie jak wątroba czy nerki. W przewodzie pokarmowych wiele funkcji wykazuje rytmiczność. Badane komórki kubkowe posiadają kształt przypominający kielich. Stanowią one największy procent komórek w jelicie grubym, natomiast w jelicie cienkim tworzą jedną z liczniejszych grup komórek nabłonkowych. Oprócz syntetyzowania i wydzielania mucyn, komórki kubkowe produkują TFF3, RELMβ oraz Fcgbp. Celem pracy było sprawdzenie czy dawcą czasu może być pokarm oraz czy restrykcyjne podawanie pokarmu powoduje zmiany rytmu produkcji gikokoniugatów w komórkach kubkowych jelita myszy. W badaniach wykorzystano samce szczepu C57/BL. Zwierzęta w czasie eksperymentu były trzymane w warunkach stałego światła. Następnie podzielono je na grupę kontrolną, która miała dostęp do pokarmu ad libitum oraz grupę eksperymentalną, której podawano pokarm w czasie subiektywnej nocy.Produkcję glikokoniugatów analizowano przez badanie ekspresji reszt cukrowych, używając lektyny Jacalin sprzężonej z FITC.W grupie kontrolnej z powodu braku dawcy czasu zaobserwowano tendencje do zanikania rytmu. Ekspresja glikokoniugatów w komórkach kubkowych tej grupy najwyższa była w CT10, a najniższa w CT21. W grupie eksperymentalnej maksimum ekspresji badanych reszt cukrowych odnotowano w CT10, a minimum w CT13 oraz w CT22.Badania wykazały, że restrykcyjne podawanie pokarmu wpływa na rytmiczną ekspresję glikokoniugatów w komórkach kubkowych jelita cienkiego. Pokarm może być dawcą czasu.
Rhythms occurring in living organisms are controlled by a biological clock, located in the suprachiasmatic nuclei (SCN). Many studies have shown that there are peripheral clocks, such as the liver or kidneys. The gastrointestinal tract functions also show a daily rhytmicity.Goblet cells have a cup shape, hence the name. They are the most numerous of epithelial cells in the colon. In the small intestine, apart from synthesizing and secreting mucins, intestinal goblet cells also produce TFF, Fcgbp and RELMB. The goal of this study was to check if restrictive administration of food can change the rhythmicity of glycoconjugates in the intestinal goblet cells of mice. Males of C57/BL strain were used.During the experiment the animals were kept in constant light (LL). The control group had access to food ad libitum and the experimental group was given food during the subjective night.The production of glycoconjugates was analyzed by examining the expression of sugar residues using Jacalin lectin conjugated with FITC.In the control group circadian oscillations has been vanishing due to the absence of Zeitgeber. In this group the maximum of expression is observed at CT10, whereas the lowest level of expression of glycoconjugates is observed at CT21. In the experimental group of mice, the maximum of glicoconjugate’s expression is observed at CT10, the minimum at the CT13 and CT22.Restricted feeding has influence on the rhythmicity of glycoconjugates expression in goblet cells.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Inne
Tytuł:
Synteza i zastosowanie nowych katalizatorów metatezy olefin
Synthesis and application of new olefin metathesis catalysts
Autorzy:
Hryniewicka, A.
Tematy:
metateza olefin
katalizatory rutenowe
pochodne chromanu
sole imidazolidyniowe
glikokoniugaty
olefin metathesis
ruthenium catalysts
chromane derivatives
imidazolinium salts
glycoconjugates
Pokaż więcej
Wydawca:
Polskie Towarzystwo Chemiczne
Powiązania:
https://bibliotekanauki.pl/articles/172521.pdf  Link otwiera się w nowym oknie
Opis:
Olefin metathesis has emerged as a powerful tool for the formation of carboncarbon double bonds. The success of this methodology has spurred the intense investigation of new catalysts showing a better application profile. The syntheses and the application profiles of the seven new ruthenium metathesis catalysts have been described. Five of them were modified in benzylidene part with 6-hydroxychromane- and 2H-3,4-chromenemethylidene moiety. In chromanol – α-tocopherol model compound, some specific stereoelectronic effects have been observed. Introduction of this ligand to the catalyst may provide new advantageous properties. The other new catalysts contained modified N-heterocyclic carbene ligand (NHC), in which N,N’-mesityl substituents of NHC system were linked with diethylene glycol chain as a “clamping ring”. This ring would contribute to a steric shield of the NHC and ruthenium coordination center. Probably it may inforce a proper orientation of substituents in metallacyclobutane (all-cis), leading to Z-olefin formation. The obtained catalysts were investigated in model reactions: ring closing metathesis, cross metathesis and enyne metathesis. The experiments proved they efficiency. In many reactions the catalysts showed activity comparable or superior to that of commercially available Grubbs and Hoveyda 2nd generation complexes. Stereochemistry Z/E of the cross-metathesis products obtained using new and known complexes were similar as well. The catalysts were applied in the synthesis of a new type of α-tocopherol glycoconjugates. An efficient method of the synthesis Hoveyda 2nd type complexes starting from ruthenium trichloride was developed. It is possible to circumvent using special laboratory equipment and expensive reagents. Hoveyda type complexes can be achieved with very good yield in gram scale. Keywords:
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aminokwasy, glikany, peptydy i białka w ścieżkach diagnostycznych i terapeutycznych chorób cywilizacyjnych XXI wieku : projektowanie i charakterystyka fizykochemiczna oraz strukturalna
Amino acids, glycans, peptides and proteins in the diagnostic and therapeutic pathways of the 21st century civilization diseases : design, physicochemical and structural characterisation
Autorzy:
Bylińska, Irena
Dzierżyńska, Maria
Giżyńska, Małgorzata
Guzow, Katarzyna
Jankowska, Elżbieta
Jurczak, Przemysław
Kaczyński, Zbigniew
Karska, Natalia
Kowalczyk, Agnieszka
Kuncewicz, Katarzyna
Orlikowska, Marta
Sawicka, Justyna
Spodzieja, Marta
Szpakowska, Nikola
Szymańska, Aneta
Wieczerzak, Ewa
Witkowska, Julia
Rodziewicz-Motowidło, Sylwia
Tematy:
fluorophores
fluorescence spectroscopy
antimicrobial activity
anticancer activity
Cystapep
Stahylococcus aureus
antimicrobial compounds
amyloidogenic protein
mutagenesis
fibrilization
proteasome
aging
neurodegeneration
self-assembling peptides
tissue engineering
biomaterials
immune checkpoints
peptide inhibitors
immunotherapy
ligands of TAP protein
viral diseases
NMR structure of the UL49.5 protein
glycans
glycoconjugates
fluorofory
spektroskopia fluorescencyjna
aktywność przeciwdrobnoustrojowa
aktywność antynowotworowa
Staphylococcus aureus
związki przeciwbakteryjne
białko amyloidogenne
mutageneza
fibrylizacja
proteasom
procesy starzeniowe
neurodegeneracja
peptydy samoorganizujące
inżynieria tkankowa
biomateriały
punkty kontrolne układu immunologicznego
inhibitory peptydowe
immunoterapia
ligandy białka TAP
choroby wirusowe,
struktura NMR białka UL49.5
glikany
glikokoniugaty
Pokaż więcej
Wydawca:
Polskie Towarzystwo Chemiczne
Powiązania:
https://bibliotekanauki.pl/articles/2200549.pdf  Link otwiera się w nowym oknie
Opis:
The civilization diseases of the 21st century are non-infectious disorders, affecting a large part of modern society. They are associated with the significant development of industry and technology, and hence with environmental pollution and an unhealthy lifestyle. These factors have led to the development of many civilization diseases, which currently include: cardiovascular diseases, respiratory diseases, diabetes, obesity, malignant tumors, gastrointestinal diseases, mental disorders and allergic diseases. The development of technologies, including modern therapies and new drugs, resulted in increase in life expectancy. This creates a global problem of an aging population with an increasing number of diseases of the old age, i.e. dementias. In addition, sedentary lifestyles and changing diets are the reasons why more and more people develop metabolic diseases, as well as neurological and cognitive disorders characterized by progressive damage to nerve cells and dementia. Currently, problem on a global scale is also the growing resistance to existing antimicrobial drugs. Therefore, the scientists face many challenges related to searching for the causes of these diseases, their diagnosis and treatment. Scientific research conducted at the Department of Biomedical Chemistry at the Faculty of Chemistry of the University of Gdańsk is part of this research trend. In this publication, we discuss various research topics with the long-term aim of solving the problems associated with the diseases mentioned above. The following chapters are dedicated to (i) looking for new effective fluorophores with diagnostic and anti-cancer activity; (ii) designing of new compounds with antibacterial and antiviral activity and their synthesis; (iii) investigating the mechanisms of amyloid deposit formation by human cystatin C and possibilities of inhibition of this process; (iv) designing and studies of compounds activating the proteasome with the potential to suppress the development of neurodegenerative diseases; (v) designing peptide fibrils and hydrogels as drug carriers; (vi) searching for peptide inhibitors of immune checkpoint as potential drugs for immunotherapy; (vii) studying the mechanism of action of selected herpesviruses by determining the structure of viral proteins and (viii) studying the composition of natural glycans and glycoconjugates in order to better understand the mechanisms of interaction of bacteria with the environment or with the host.
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-9 z 9

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