High impact information on Usnea

• Diffractaic acid and usnic acid were identified as the analgesic and antipyretic components of a lichen, Usnea diffracta [1].
• Usnic acid and diffractaic acid as analgesic and antipyretic components of Usnea diffracta [1].
• Parmelia caperata and Parmelia reticulata were positive in all, and in a descending order of positivity: Pseudovernia furfuracea, Evernia prunastri, Usnea spp, Ramalina lusitanica. d-Usnic and evernic acids and atranorin were the main responsible allergens [2].
• Various solvent extracts of the lichen Usnea ghattensis showed good antioxidant activity [3].
• Antiplatelet and antithrombotic activities of methanol extract of Usnea longissima [4].

Anatomical context of Usnea

• Hepatotoxic effect of (+)usnic acid from Usnea siamensis Wainio in rats, isolated rat hepatocytes and isolated rat liver mitochondria [5].

Associations of Usnea with chemical compounds

• Isolation of (+) usnic acid from Sudanese drug Usnea molliuscula [6].
• In this study, the antiulcerogenic effect of a water extract obtained from the lichen species Usnea longissima was investigated using indomethacin-induced ulcer models in rats [7].
• The usnic acid production by a mycobiont of the lichen Usnea hirta was higher in the liquid medium containing ammonium and nitrate ions than in those containing amino acids [8].

Gene context of Usnea

• In Romania, Usnea barbata was mentioned in 1929 among the plants known by Romanian people with popular names: "Bear's beard", "Trees' dandruff", "Woman's long hair" (1). "Farmacia naturii" (2) and "Flora medicinală a Romaniei" (3) have mentioned that Usnea barbata (L) Mott contains usnic acid-substance with broad antibiotic spectrum [9].

References