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16-Hydroxy-Lycopersene, a Polyisoprenoid Alcohol Isolated from Tournefortia hirsutissima, Inhibits Nitric Oxide Production in RAW 264.7 Cells and Induces Apoptosis in Hep3B Cells.

ABSTRACT: Three polyisoprenoid alcohols were isolated from the leaves of Tournefortia hirsutissima by a bioassay-guided phytochemical investigation. The compounds were identified as 16-hydroxy-lycopersene (Compound 1), (Z8,E3,?)-dodecaprenol (Compound 2) and (Z9,E3,?)-tridecaprenol (Compound 3). Compound 1, an unusual polyisoprenoid, was characterized by 1D and 2D NMR. We also determined the absolute configuration at C-16 by the modified Mosher's method. The in vitro antiproliferative and anti-inflammatory activities of the isolated compounds were evaluated. Among isolates, Compound 1 moderately inhibited the nitric oxide production in lipopolysaccharide (LPS)-stimulated RAW 264.7 cells. On the other hand, Compound 1 displayed selective antiproliferative activity against HeLa, PC3, HepG2 and Hep3B cancer cells and was less potent against IHH non-cancerous cells. Compound 1 in Hep3B cells showed significant inhibition of cell cycle progression increasing the sub-G1 phase, suggesting cell death. Acridine orange/ethidium bromide staining and Annexin V-FITC/PI staining demonstrated that cell death induced by Compound 1 in cells Hep3B was by apoptosis. Further study showed that apoptosis induced by Compound 1 in Hep3b cells is associated with the increase of the ratio of Bax/Bcl-2, and caspase 3/7 activation. These results suggest that Compound 1 induce apoptotic cell death by the mitochondrial pathway. To our knowledge, this is the first report about the presence of polyprenol Compounds 1-3 in T. hirsutissima, and the apoptotic and anti-inflammatory action of Compound 1.

SUBMITTER: Hurtado-Diaz I

PROVIDER: S-EPMC6651038 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature

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Publications

16-Hydroxy-Lycopersene, a Polyisoprenoid Alcohol Isolated from Tournefortia hirsutissima, Inhibits Nitric Oxide Production in RAW 264.7 Cells and Induces Apoptosis in Hep3B Cells.

Hurtado-Díaz Israel I Sánchez-Carranza Jessica Nayelli JN Romero-Estrada Antonio A González-Maya Leticia L González-Christen Judith J Herrera-Ruiz Maribel M Alvarez Laura L

Molecules (Basel, Switzerland) 20190626 13

Three polyisoprenoid alcohols were isolated from the leaves of Tournefortia hirsutissima by a bioassay-guided phytochemical investigation. The compounds were identified as 16-hydroxy-lycopersene (Compound 1), (Z8,E3,ω)-dodecaprenol (Compound 2) and (Z9,E3,ω)-tridecaprenol (Compound 3). Compound 1, an unusual polyisoprenoid, was characterized by 1D and 2D NMR. We also determined the absolute configuration at C-16 by the modified Mosher's method. The in ...[more]

PMID: 31248041

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Project description:Initiation of nitric oxide (NO.)-mediated apoptotic cell death in RAW 264.7 macrophages is associated with up-regulation of mitochondrial manganese superoxide dismutase (MnSOD; SOD2) and down-regulation of cytosolic copper zinc superoxide dismutase (CuZnSOD; SOD1) at their individual mRNA and protein levels. To evaluate the decreased CuZnSOD expression and the initiation of apoptosis we stably transfected macrophages to overexpress human CuZnSOD. Individual clones revealed a 2-fold increase in CuZnSOD activity. Expression of a functional and thus protective CuZnSOD was verified by attenuated superoxide (O2(.)-)-mediated apoptotic as well as necrotic cell death. In this study we showed that SOD-overexpressing macrophages (R-SOD1-12) were also protected against NO.-initiated programmed cell death. Protection was substantial towards NO. derived from exogenously added NO donors or when NO. was generated by inducible NO synthase activation, and was evident at the level of p53 accumulation, caspase activation and DNA fragmentation. Stimulation of parent and SOD-overexpressing cells with a combination of lipopolysaccharide and murine interferon gamma produced equivalent amounts of nitrite/nitrate, which ruled out attenuated inducible NO. synthase activity during protection. Because protection by a O2(.)--scavenging system during NO. -intoxication implies a role of NO. and O2(.)- in the progression of cell damage, we used uric acid to delineate the role of peroxynitrite during NO.-elicited apoptosis. The peroxynitrite scavenger uric acid left S-nitrosoglutathione or spermine-NO-elicited apoptosis unaltered, blocking only 3-morpholinosydnonimine-mediated cell death. As a result we exclude peroxynitrite from contributing, to any major extent, to NO. -mediated apoptosis. Therefore protection observed with CuZnSOD overexpression is unlikely to stem from interference with peroxynitrite formation and/or action. Unequivocally, the down-regulation of CuZnSOD is associated with NO. cytotoxicity, whereas CuZnSOD overexpression protects macrophages from apoptosis.

Dataset Information

16-Hydroxy-Lycopersene, a Polyisoprenoid Alcohol Isolated from Tournefortia hirsutissima, Inhibits Nitric Oxide Production in RAW 264.7 Cells and Induces Apoptosis in Hep3B Cells.

Publications

16-Hydroxy-Lycopersene, a Polyisoprenoid Alcohol Isolated from Tournefortia hirsutissima, Inhibits Nitric Oxide Production in RAW 264.7 Cells and Induces Apoptosis in Hep3B Cells.

Similar Datasets

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