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Wyszukujesz frazę "lipopolysaccharides" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Chemical characterization of effective and ineffective strains of Rhizobium leguminosarum bv. viciae
Autorzy:
Izmailov, Stanislav
Zhiznevskaya, Genrietta
Kosenko, Larisa
Troitskaya, Galina
Kudryavtseva, Nataly
Borodenko, Ludmila
Dubrovo, Pavel
Russa, Ryszard
Pietras, Hubert
Lorkiewicz, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/1044461.pdf
Data publikacji:
1999
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
lipopolysaccharides
fatty acids
Rhizobium leguminosarum bv. viciae
Opis:
Chemical composition of lipopolysaccharide (LPS) isolated from an effective (97) and ineffective (87) strains of R. l. viciae has been determined. LPS preparations from the two strains contained: glucose, galactose, mannose, fucose, arabinose, heptose, glucosamine, galactosamine, quinovosamine, and 3-N-methyl-3,6-dideoxyhexose, as well as glucuronic, galacturonic and 3-deoxyoctulosonic acid. The following fatty acids were identified: 3-OH 14:0, 3-OH 15:0, 3-OH 16:0, 3-OH 18:0 and 27-OH 28:0. The ratio of 3-OH 14:0 to other major fatty acids  in LPS 87 was higher that in LPS 97. SDS/PAGE profiles of LPS indicated that, in lipopolysaccharides, relative content of S form LPS I to that of lower molecular mass (LPS II) was much higher in the effective strain 97 than in 87. All types of polysaccharides exo-, capsular-, lipo, (EPS, CPS, LPS, respectively) examined possessed the ability to bind faba bean lectin. The degree of affinity of the host lectin to LPS 87 was half that to LPS 97. Fatty acids (FA) composition from bacteroids and peribacteroid membrane (PBM) was determined. Palmitic, stearic and hexadecenoic acids were common components found in both strains. There was a high content of unsaturated fatty acids in bacteroids as well as in PBM lipids. The unsaturation index in the PBM formed by strain 87 was lower than in the case of strain 97. Higher ratio of 16:0 to 18:1 fatty acids was characteristic for PMB of the ineffective strain.
Źródło:
Acta Biochimica Polonica; 1999, 46, 4; 1001-1009
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ANTI-INFLAMMATORY ACTIVITY AND CYTOTOXICITY OF DIOSGENIN ON LIPOPOLYSACCHARIDES INDUCED RAW 264.7 CELLS
Autorzy:
ning, jing
chang, yu
wang, ruxia
lan, zhiwei
ru, qing
liu, mingchun
tian, chunlian
Powiązania:
https://bibliotekanauki.pl/articles/895615.pdf
Data publikacji:
2020-04-29
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
Diosgenin
Anti-inflammatory
lipopolysaccharides
cytotoxicity
phagocytosis ability  
Opis:
Diosgenin is a steroidal sapogenin compound, and possesses multiple biological activities including anti-inflammatory, anticancer, immunological regulation, and anti-aging. The current study focused on its anti-inflammatory activities and cytotoxicity by analysis of NO production, phagocytosis activity, secretion of TNF-α and IL-6 and cell viability in LPS-induced RAW 264.7 cells. An IC50 value of diosgenin of 2.8 μM was calculated for diosgenin by regression of cell viability from concentrations ranging from 0.01 to 25 μM; this indicated that 0.01, 0.02, 0.04 μM diosgenin could reduce phagocytic activity very significantly (p<0.01) in a dose-dependent manner with no cytotoxic effect on the LPS-induced RAW 264.7 cells. However, there was no significant effect on NO content and secretion of TNF-α and IL-6 after diosgenin treatment. The research revealed that low concentrations diosgenin can directly inhibit cells phagocytosis, with no effect on the release of inflammatory mediators and cytokines. This lays a foundation for screening for a safe dose in research and developent of derivatives and new formulation of diosgenin for its anti-inflammatory effect.
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2020, 77, 2; 313-317
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lipopolysaccharides from Mesorhizobium huakuii and Mesorhizobium ciceri: chemical and immunological comparative data.
Autorzy:
Choma, Adam
Powiązania:
https://bibliotekanauki.pl/articles/1043713.pdf
Data publikacji:
2002
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
immunobloting
lipopolysaccharides
2,3-diamino-2,3-dideoxy-D-glucose
fatty acids
Mesorhizobium huakuii
Mesorhizobium ciceri
sugars
Opis:
Lipopolysaccharides of two Mesorhizobium species of different host specificity were compared: M. huakuii and M. ciceri. M. huakuii sp. was represented by five strains with special consideration of M. huakuii IFO 15243T. SDS/PAGE profiles revealed that all M. huakuii LPS preparations contained low molecular mass fractions (LPS-II) of the same molecular size. All of lipopolysaccharides contained high molecular mass fractions (LPS-I). However, the high molecular mass fraction from each strain possessed an individual molecular size distribution pattern. The crossreactivity of blotted lipopolysaccharides with rabbit polyclonal antibodies against Mesorhizobium huakuii IFO 15243T whole bacteria indicated the presence of common epitope(s) within the investigated Mesorhizobium huakuii strains. Moreover, LPS from M. huakuii S52 also reacted with anti M. ciceri HAMBI 1750 serum showing that there are epitopes common for different mesorhizobial species. LPS isolated from Mesorhizobium huakuii strain IFO 15243T contained neutral sugars: L-6-deoxytalose, L-rhamnose, D-galactose and D-glucose, aminosugars: D-quinovosamine, D-glucosamine, D-2,3-diamino-2,3-dideoxyglucose and D-galacturonic and D-glucuronic acids. In the LPS preparation, fatty acids typical for Mesorhizobium strains were detected. 3-Hydroxydodecanoic, 3-hydroxy-iso-tridecanoic, 3-hydroxyeicosanoic, 3-hydroxyheneicosanoic and 3-hydroxydocosenoic acids were the major amide linked fatty acids, while iso-heptadecanoic, eicosanoic, docosenoic, as well as 27-hydroxyoctacosanoic and 27-oxooctacosanoic acids were the dominant ester linked fatty residues.
Źródło:
Acta Biochimica Polonica; 2002, 49, 4; 1043-1052
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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