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Wyszukujesz frazę "lipopolysaccharide" wg kryterium: Temat


Wyświetlanie 1-7 z 7
Tytuł:
Secretion of proinflammatory cytokines by normal human melanocytes in response to lipopolysaccharide
Autorzy:
Tam, Irena
Stępień, Krystyna
Powiązania:
https://bibliotekanauki.pl/articles/1039839.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
lipopolysaccharide
melanocytes
proinflammatory cytokines
Opis:
A large body of evidence suggests that epidermal melanocytes are an integral part of the skin immune system and can be considered immunocompetent cells. Recently, it has been reported that human melanocytes constitutively express Toll-like receptors and may be involved in the induction of several inflammatory cytokines. In the study the secretion of IL-1β, IL-6 and TNF-α by cultured normal melanocytes was investigated after stimulation with lipopolysaccharide. LPS increased the secretion of IL-1β in a dose-dependent manner. IL-1β stimulated release of IL-6 and TNF-α by melanocytes, whereas LPS activated production of TNF-α, but not of IL-6. These observations indicate that LPS can participate in the regulation of cytokine activity in normal human melanocytes and suggest that cytokines released by melanocytes could affect melanocytes themselves or/and other cells of the epidermis.
Źródło:
Acta Biochimica Polonica; 2011, 58, 4; 507-511
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization of epitope specificity of Proteus penneri 7 lipopolysaccharide core region
Autorzy:
Palusiak, Agata
Sidorczyk, Zygmunt
Powiązania:
https://bibliotekanauki.pl/articles/1040317.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
epitope
lipopolysaccharide
Proteus penneri
core region
Opis:
To extend the knowledge on the fragments of Proteus penneri lipopolysaccharide core regions, which determine the cross-reactions with specific antibodies, serological studies were performed by use of P. penneri 7 core-specific antiserum and Proteus sp. lipopolysaccharides. Different reactivity of the tested antiserum with three groups of antigens suggested differences in their core regions' epitope specificity. Comparing the results of the serological investigations with the previously determined structures of the core regions of the tested P. penneri lipopolysaccharides allowed distinguishing two potential tri- and tetrasaccharide epitopes and a third fragment which could not be determined precisely.
Źródło:
Acta Biochimica Polonica; 2010, 57, 4; 529-532
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microbiome impact on metabolism and function of sex, thyroid, growth and parathyroid hormones
Autorzy:
Kunc, Michał
Gabrych, Anna
Witkowski, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/1038795.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
microbiome
lipopolysaccharide
estrogens
thyroid hormones
growth hormone
Opis:
Commensal bacteria and their genes associated with host are known as microbiome. In recent years, microbial influence on host endocrine system has been under detailed investigation. The role of microbiome in the pathogenesis of insulin resistance and obesity, the function of hypothalamic-pituitary-adrenal axis and secretion of hormones regulating appetite is well described in world literature. In this article we discuss poorly reviewed issues: the microbiome role in modulation of non-peptide (sex and thyroid) and peptide (growth hormone and parathyroid hormone) functions. Understanding complex bidirectional relations between host endocrine system and bacteria is of fundamental importance to understanding microbial impact on host reproduction, risk of endocrine-related cancers, pathogenesis of non-thyroidal illness syndrome, growth failure in children and hormonal changes during chronic kidney disease. This article also highlights effects of dietary compounds on microbiome composition and bacterial enzymes activity, and thus host hormonal status.
Źródło:
Acta Biochimica Polonica; 2016, 63, 2; 189-201
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of ketamine, propofol, and ketofol on proinflammatory cytokines and markers of oxidative stress in a rat model of endotoxemia-induced acute lung injury
Autorzy:
Gokcinar, Derya
Ergin, Volkan
Cumaoglu, Ahmet
Menevse, Adnan
Aricioglu, Aysel
Powiązania:
https://bibliotekanauki.pl/articles/1039549.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
lipopolysaccharide
acute lung injury
oxidative stress
ketamine
propofol
ketofol
Opis:
Intravenous lipopolysaccharide (LPS) leads to acute lung injury (ALI) in rats. The purpose of this study was to examine the anti-inflammatory and antioxidant efficacy of ketamine, propofol, and ketofol in a rat model of ALI. We induced ALI in rats via intravenous injection of LPS (15 mg kg-1). The animals were randomly separated into five groups: control, LPS only, LPS + ketamine (10 mg·kg-1·h-1), LPS + propofol (10 mg·kg-1·h-1), LPS + ketofol (5 mg·kg-1·h-1 ketamine + 5 mg·kg-1·h-1 propofol). LPS resulted in an increase in the release of pro-inflammatory cytokines, mRNA expression related with inflammation, production of nitric oxide, and lipid peroxidation. Ketamine prevented the increase in markers of oxidative stress and inflammation mediators, both in plasma and lung tissue. Propofol decreased the levels of cytokines in plasma and lung tissue, whereas it had no effect on the IL-1-beta level in lung tissue. Ketamine downregulated mediators of lung tissue inflammation and reduced the level of circulating cytokines and protected lung tissue against lipid peroxidation. Ketofol decreased the level of TNF-α and IL-1β in plasma, as well as expression of cyclooxygenase-2 mRNA and the nitrate/nitrite level in lung tissue. The results of this investigation support the hypothesis that ketamine may be effective in preventing ALI.
Źródło:
Acta Biochimica Polonica; 2013, 60, 3; 451-456
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Proteus mirabilis RMS 203 as a new representative of the O13 Proteus serogroup
Autorzy:
Palusiak, Agata
Siwińska, Małgorzata
Zabłotni, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/1038887.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
cross-reaction
lipopolysaccharide
O-polysaccharide
O serogroup
Proteus
Opis:
The unique feature of some Proteus O-polysaccharides is occurrence of an amide of galacturonic acid with Nε-[(S/R)-1-Carboxyethyl]-l-lysine, GalA6(2S,8S/R-AlaLys). The results of the serological studies presented here, with reference to known O-antigens structures suggest that GalA6(2S,8S/R-AlaLys) or 2S,8R-AlaLys contribute to cross-reactions of O13 Proteus antisera, and Proteeae LPSs. It was also revealed that the Proteus mirabilis RMS 203 strain can be classified into the O13 serogroup, represented so far by two strains: Proteus mirabilis 26/57 and Proteus vulgaris 8344. The O13 LPS is a serologically important antigen with a fragment common to LPSs of different species in the Proteeae tribe.
Źródło:
Acta Biochimica Polonica; 2015, 62, 4; 691-695
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rhizobium strains differ considerably in outer membrane permeability and polymyxin B resistance
Autorzy:
Komaniecka, Iwona
Zamłyńska, Katarzyna
Zan, Radosław
Staszczak, Magdalena
Pawelec, Jarosław
Seta, Irena
Choma, Adam
Powiązania:
https://bibliotekanauki.pl/articles/1038773.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
rhizobium
outer membrane
lipopolysaccharide
N-phenyl-1-naphthylamine
NPN
polymyxin B
Opis:
Six rhizobium (Rhizobium leguminosarum bv. Trifolii TA1, Sinorhizobium meliloti 1021, Mesorhizobium huakuii IFO 15243T, Ochrobactrum lupini LUP 21T, Bradyrhizobium japonicum USDA110 and B. elkanii USDA 76) and two Escherichia coli strains (E. coli ATCC 25922 and E. coli HB 101) were compared in respect to polymyxin B and EDTA resistance, as well as bacterial outer membrane (OM) permeability to a fluorescent hydrophobic agent (N-phenyl-1-naphthylamine - NPN). TEM (Transmission Electron Microscopy) and a microbial test demonstrated that all the rhizobia were much more resistant to polymyxin B in comparison with E. coli strains. EDTA and polymyxin B enhance permeability of B. japonicum and O. lupini OM. Other rhizobia incorporated NPN independently of the presence of membrane-deteriorating agents; however, the level of fluorescence (measured as NPN absorption) was strain dependent.
Źródło:
Acta Biochimica Polonica; 2016, 63, 3; 517-525
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The amide of galacturonic acid with lysine as an immunodominant component of the lipopolysaccharide core region from Proteus penneri 42 strain
Autorzy:
Palusiak, Agata
Maciejewska, Anna
Ługowski, Czesław
Różalski, Antoni
Powiązania:
https://bibliotekanauki.pl/articles/1039351.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
amide of galacturonic acid with lysine
anti-conjugate serum
core region
lipopolysaccharide
Proteus
Opis:
Most Proteus lipopolysaccharides (LPSs) contain uronic acids or their amides with different amino acids, which together with other negatively charged components account for the acidic character of such LPS molecules. Previous studies have shown the significance of an amide of galacturonic acid with lysine [D-GalA(L-Lys)] for serological specificity of O-antigens from few P. mirabilis strains. In this work, the immunodominant role of GalALys was indicated for the P. penneri 42 LPS core region. The studies also showed the serological identity of core oligosaccharides from P. penneri 42 (O71), P. mirabilis 51/57 (O28) and R14/S1959 strains.
Źródło:
Acta Biochimica Polonica; 2014, 61, 1; 129-132
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-7 z 7

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