In vitro: |
Biochem Biophys Res Commun. 1983 Feb 10;110(3):733-9. | Inhibition of histidine decarboxylase and tumour promoter-induced arachidonic acid release by lecanoric acid analogues.[Pubmed: 6404261] |
METHODS AND RESULTS:
Lecanoric acid analogues containing benzanilide structure inhibited histidine decarboxylase and arachidonic acid release from the cell membrane phospholipids induced by a tumour promoter, 12-O-tetradecanoylphorbol-13-acetate. But they did not inhibit cellular binding of phorbol-12,13-dibutylate. Lecanoric acid analogues also inhibited prostaglandin synthetase and delayed-type hypersensitivity responses against sheep red blood cells in mice.
CONCLUSIONS:
Thus, Lecanoric acid analogues antagonized several enzymic and cellular effects of the tumour promoter. | J Food Sci Technol. 2014 Oct;51(10):2624-31. | Growth promoting effects of some lichen metabolites on probiotic bacteria.[Pubmed: 25328204] | METHODS AND RESULTS:
The lichen metabolites showed antioxidant activity with an IC50 values (μg/ml); Lecanoric acid 79-95, salazinic 88-108, atranorin 100-116 and consalazinic acid 119-125. As far as the growth promoting effects of lichen metabolites on L. casei is concerned, Lecanoric acid at 100 μg/ml conc. showed high growth stimulating activity in terms of increased dry matter of biomass (56.08 mg) of L. casei. Other lichen metabolites; salazinic acid, atranorin and consalazinic acid produced relatively less dry biomass 43.98 mg, 41.1 mg, 40.68 mg, respectively. However, standard antioxidants butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT) and Trolox after 36 h produced 39.04-47.81 mg dry biomass.
CONCLUSIONS:
At lower pH the growth promoting activity of lichen metabolites was found stable. |
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