title: Novel derivative of benzofuran induces cell death mostly by G2/M cell cycle arrest through p53-dependent pathway but partially by inhibition of NF-kappaB.
abstract: The Dracaena resin is widely used in traditional medicine as an anticancer agent, and benzofuran lignan is the active component. In this report, we provide evidence that the synthetic derivative of benzofuran lignan (Benfur) showed antitumor activities. It induced apoptosis in p53-positive cells. Though it inhibited endotoxin-induced nuclear factor kappaB (NF-kappaB) activation in both p53-positive and -negative cells, the activation of caspase 3 was observed in p53-positive cells. It showed partial cell death effect in both p53-positive and -negative cells through inhibition of NF-kappaB. Cell cycle analysis using flow cytometry showed that treatment with this novel benozofuran lignan derivative to Jurkat T-cells, but not U-937 cells, resulted in a G2/M arrest in a dose- and time-dependent manner. It increased amounts of p21, p27, and cyclin B, but not phospho-Rb through p53 nuclear translocation in Jurkat T-cells, but not in U-937 cells. It inhibited amounts of MDM2 (murine double minute 2) by repressing the transcription factor Sp1, which was also proved in silico. It induced cell death in tumor cells, but not in primary T-cells. Overall, our data suggest that Benfur-mediated cell death is partially dependent upon NF-kappaB, but predominantly dependent on p53. Thus, this novel benzofuran lignan derivative can be effective chemopreventive or chemotherapeutic agent against malignant T-cells.
authors.affiliation: Laboratory of Immunology, Centre for DNA Fingerprinting and Diagnostics, Nampally, Hyderabad 500 001, India. manna@cdfd.org.in
authors.forename: Sunil K
authors.initials: SK
authors.lastname: Manna
authors.forename: Julie S
authors.initials: JS
authors.lastname: Bose
authors.forename: Vijay
authors.initials: V
authors.lastname: Gangan
authors.forename: Nune
authors.initials: N
authors.lastname: Raviprakash
authors.forename: Thota
authors.initials: T
authors.lastname: Navaneetha
authors.forename: Pongali B
authors.initials: PB
authors.lastname: Raghavendra
authors.forename: Banaganapalli
authors.initials: B
authors.lastname: Babajan
authors.forename: Chitta S
authors.initials: CS
authors.lastname: Kumar
authors.forename: Swatantra K
authors.initials: SK
authors.lastname: Jain
mesh_terms: D001572:Benzofurans / Q000494:pharmacology*; D020169:Caspases / Q000378:metabolism; D016923:Cell Death / Q000187:drug effects; D045744:Cell Line, Tumor; D050759:Cyclin-Dependent Kinase Inhibitor p21 / Q000378:metabolism; D050760:Cyclin-Dependent Kinase Inhibitor p27 / Q000378:metabolism; D045304:Cytochromes c / Q000378:metabolism; D003593:Cytoplasm / Q000187:drug effects / Q000378:metabolism; D004273:DNA, Neoplasm / Q000378:metabolism; D004354:Drug Screening Assays, Antitumor; D004789:Enzyme Activation / Q000187:drug effects; D016195:G2 Phase / Q000187:drug effects*; D006801:Humans; D020672:I-kappa B Proteins / Q000378:metabolism; D017705:Lignans / Q000494:pharmacology*; D008938:Mitosis / Q000187:drug effects*; D000072000:NF-KappaB Inhibitor alpha; D016328:NF-kappa B / Q000037:antagonists & inhibitors* / Q000378:metabolism; D009928:Organ Specificity / Q000187:drug effects; D011065:Poly(ADP-ribose) Polymerases / Q000378:metabolism; D011485:Protein Binding / Q000187:drug effects; D051736:Proto-Oncogene Proteins c-mdm2 / Q000378:metabolism; D015398:Signal Transduction / Q000187:drug effects*; D016329:Sp1 Transcription Factor / Q000378:metabolism; D051996:Transcription Factor RelA / Q000378:metabolism; D016159:Tumor Suppressor Protein p53 / Q000378:metabolism*; D051028:bcl-2-Associated X Protein / Q000378:metabolism
chemical_list: D001572:Benzofurans; D050759:Cyclin-Dependent Kinase Inhibitor p21; D004273:DNA, Neoplasm; D020672:I-kappa B Proteins; D017705:Lignans; D016328:NF-kappa B; C000606204:NFKBIA protein, human; D016329:Sp1 Transcription Factor; D051996:Transcription Factor RelA; D016159:Tumor Suppressor Protein p53; D051028:bcl-2-Associated X Protein; D000072000:NF-KappaB Inhibitor alpha; D050760:Cyclin-Dependent Kinase Inhibitor p27; D045304:Cytochromes c; C497206:MDM2 protein, human; D051736:Proto-Oncogene Proteins c-mdm2; D011065:Poly(ADP-ribose) Polymerases; D020169:Caspases
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