Anti-inflammatory and antiallergic activity in vivo of lipophilic Isatis tinctoria extracts and tryptanthrin.
The effects of a supercritical CO2 (SFE) extract, a dichloromethane (DCM) extract from Isatis tinctoria leaf and the alkaloidal constituent tryptanthrin were studied in acute and subchronic experimental models of inflammation. The SFE and DCM extracts showed anti-inflammatory activity in the carrageenan-induced acute mouse paw oedema (ED50 values of 78 mg/kg and 165 mg/kg P. O., respectively) and in the acute tetradecanoylphorbol acetate (TPA)-induced mouse ear oedema in oral (62% and 32% oedema reduction at 100 and 125 mg/kg, respectively) and topical application (37% and 33% reduction of oedema at 0.5 mg/ear). In contrast, tryptanthrin showed no significant anti-inflammatory effect. The DCM extract inhibited oedema formation and neutrophil infiltration in subchronic inflammation in mice induced by repeated application of TPA. The extract showed activity after oral and topical administration by reducing the various parameters of the inflammatory response. The DCM extract (1 mg/ear) inhibited the delayed-type hypersensitivity (DTH) reaction induced by application of dinitrofluorobenzene (DNFB) after topical application. The response during the induction phase (24 h) was decreased by 48%, and the inflammatory phase (48 to 96 h) was reduced by 53 to 56%. The extract had no effect in this model when administered orally. The DCM extract (200 mg/kg P. O.) inhibited the acetic acid-induced writhing by 49%.
Recio
María-Carmen
MC
Department of Pharmacology, Faculty of Pharmacy, University of Valencia, Valencia, Spain.
Cerdá-Nicolás
Miguel
M
Potterat
Olivier
O
Hamburger
Matthias
M
Ríos
José-Luis
JL
D000279:Administration, Cutaneous; D000284:Administration, Oral; D000818:Animals; D018926:Anti-Allergic Agents / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use; D000893:Anti-Inflammatory Agents / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D002351:Carrageenan; D004365:Drugs, Chinese Herbal / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use; D004487:Edema / Q000139:chemically induced / Q000188:drug therapy*; D005260:Female; D006967:Hypersensitivity / Q000188:drug therapy / Q000209:etiology; D031219:Isatis; D051379:Mice; D008517:Phytotherapy; D010936:Plant Extracts / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D018515:Plant Leaves; D011799:Quinazolines / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D013755:Tetradecanoylphorbol Acetate
D018926:Anti-Allergic Agents; D000893:Anti-Inflammatory Agents; D004365:Drugs, Chinese Herbal; D010936:Plant Extracts; D011799:Quinazolines; C046243:tryptanthrine; D002351:Carrageenan; D013755:Tetradecanoylphorbol Acetate