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Viana,G.S.B.; Freitas,A.L.P.; Lima,M.M.L.; Vieira,L.A.P.; Andrade,M.C.H.; Benevides,N.M.B.. |
We report the antinociceptive activity, determined by the writhing, formalin and hot-plate tests in mice, of crude (F0/60), lectin and carbohydrate fractions isolated by ammonium sulfate precipitation (0 to 60%) from Bryothamnion seaforthii and B. triquetrum, species of red algae. Not only fraction F0/60 but also lectins from both species significantly inhibited acetic acid-induced abdominal contractions after intraperitoneal or oral administrations. In the formalin test, lectins (1 and 5 mg/kg, ip, and 5 to 20 mg/kg, po) inhibited the 1st and 2nd phases (5 and 20 min, respectively), but the effect occurred predominantly on the 2nd phase. The effects of the lectins were totally or partially reversed by naloxone (2 mg/kg, sc) in the 1st and 2nd phases,... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Red algae; Bryothamnion seaforthii; Bryothamnion triquetrum; Carbohydrates; Antinociceptive effect. |
Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002000600012 |
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Holanda,M.L.; Melo,V.M.M.; Silva,L.M.C.M.; Amorim,R.C.N.; Pereira,M.G.; Benevides,N.M.B.. |
A lectin isolated from the red alga Solieria filiformis was evaluated for its effect on the growth of 8 gram-negative and 3 gram-positive bacteria cultivated in liquid medium (three independent experiments/bacterium). The lectin (500 µg/mL) stimulated the growth of the gram-positive species Bacillus cereus and inhibited the growth of the gram-negative species Serratia marcescens, Salmonella typhi, Klebsiella pneumoniae, Enterobacter aerogenes, Proteus sp, and Pseudomonas aeruginosa at 1000 µg/mL but the lectin (10-1000 µg/mL) had no effect on the growth of the gram-positive bacteria Staphylococcus aureus and B. subtilis, or on the gram-negative bacteria Escherichia coli and Salmonella typhimurium. The purified lectin significantly reduced the cell density... |
Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Red alga; Solieria filiformis; Human pathogenic bacteria; Lectin; Antibacterial activity; Klebsiella pneumoniae. |
Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005001200005 |
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