panduratin-a and Leukemia--Basophilic--Acute

Immediate-type hypersensitivity is characterized by elevated levels of immunoglobulin E (IgE) and activated mast cell plays a crucial role by releasing granule contents, lipid-derived mediators, cytokines, and chemokines. To evaluate the antiallergic effects of panduratin A isolated from Boesenbergia pandurata Roxb., we determined its effects on calcium (Ca(2+)) influx, degranulation, and inflammatory mediators in calcium ionophore A23187 and phorbol 12-myristate 13-acetate (PMA)-stimulated rat basophilic leukemia (RBL-2H3) cells. Panduratin A (20 μM) inhibited secretion of β-hexosaminidase (46.69 ± 9.6 %), histamine (34.32 ± 2.1 %), and Ca(2+) influx (43.84 %). Panduratin A reduced the production of prostaglandin E(2) (PGE(2), 47.58 ± 3.4 %), leukotriene B(4) (LTB(4), 98.15 ± 1.6 %), and the mRNA expression of cyclooxygenase-2, 5-lipoxygenase, interleukin (IL)-4, IL-13, and tumor necrosis factor-α. Furthermore, panduarin A attenuated phosphorylation of Akt, the mitogen-activated protein kinases (MAPK) extracellular signal-regulated kinase (ERK), p38, and c-Jun N-terminal kinase (JNK) expression. These results indicate that panduratin A might be useful as an agent against immediate-type hypersensitivity.

Topics: Animals; Arachidonate 5-Lipoxygenase; beta-N-Acetylhexosaminidases; Calcimycin; Calcium; Cell Degranulation; Cell Line, Tumor; Chalcones; Cyclooxygenase 2; Extracellular Signal-Regulated MAP Kinases; Histamine; Histamine Release; Hypersensitivity, Immediate; Immunoglobulin E; Inflammation Mediators; Interleukin-13; Interleukin-4; JNK Mitogen-Activated Protein Kinases; Leukemia, Basophilic, Acute; Leukotriene B4; Mast Cells; p38 Mitogen-Activated Protein Kinases; Phosphorylation; Plant Extracts; Prostaglandins E; Proto-Oncogene Proteins c-akt; Rats; RNA, Messenger; Signal Transduction; Tetradecanoylphorbol Acetate; Tumor Necrosis Factor-alpha; Zingiberaceae