Cell Death Cell Proliferation Cell death Eurycoma Eurycoma longifolia Jack Eurycomanol Eurycomanone Humans Inflammation Jurkat Cells Leukemia Leukocytes, Mononuclear NF-kappa B NF-κB Plant Extracts Proliferation Quassins Signal Transduction antagonists and inhibitors cell death cell proliferation chemistry drug effects eurycomanol eurycomanone human immunoglobulin enhancer binding protein inflammation jurkat cell line leukemia