Cytotoxic and Apoptotic Effects of the Oxidized Derivatives of Stigmasterol in the U937 Human Monocytic Cell Line.

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TY  - JOUR
  - O'Callaghan YC, Foley DA, O'Connell NM, McCarthy FO, Maguire AR, O'Brien NM
  - 2010
  - September
  - Journal of Agricultural and Food Chemistry
  - Cytotoxic and Apoptotic Effects of the Oxidized Derivatives of Stigmasterol in the U937 Human Monocytic Cell Line.
  - Validated
  - ()
  - 58
  - 10793
  - 10798
  - Dietary exposure to phytosterols has increased in recent years due to the incorporation of these compounds into cholesterol-lowering products. Previous studies have investigated the cytotoxic effects of the oxidized derivatives of ß-sitosterol and determined that phytosterol oxidation products (POP) have a similar but less potent toxicity compared to their cholesterol equivalents. In the present study, the cytotoxicity of the oxidized derivatives of stigmasterol were investigated in the U937 cell line. The stigmasta-5,22-diene-3ß,7ß-diol (7ß-OH), 5,6-epoxystigmasta-22,23-diol (epoxydiol), 5,6,22,23-diepoxystigmastane (diepoxide), and (22R,23R)-stigmast-5-ene-3ß,22,23-triol (22R,23R-triol) derivatives were identified as the most cytotoxic, and the mode of cell death was identified as apoptosis in cells incubated with 7ß-OH, epoxydiol, and diepoxide stigmasterol. The antioxidants a-tocopherol, ¿-tocopherol, and ß-carotene did not protect against apoptosis induced by 7ß-OH and diepoxide stigmasterol; however, a-tocopherol was found to protect against epoxydiol-induced apoptosis. The cellular antioxidant, glutathione, was depleted and the apoptotic protein, Bcl-2, was down-regulated by the stigmasterol oxides identified as apoptotic.
  - 10.1021/jf1023017
DA  - 2010/09
ER  - 
@article{V50365308,
   = {O'Callaghan YC,  Foley DA and  O'Connell NM,  McCarthy FO and  Maguire AR,  O'Brien NM },
   = {2010},
   = {September},
   = {Journal of Agricultural and Food Chemistry},
   = {Cytotoxic and Apoptotic Effects of the Oxidized Derivatives of Stigmasterol in the U937 Human Monocytic Cell Line.},
   = {Validated},
   = {()},
   = {58},
  pages = {10793--10798},
   = {{Dietary exposure to phytosterols has increased in recent years due to the incorporation of these compounds into cholesterol-lowering products. Previous studies have investigated the cytotoxic effects of the oxidized derivatives of ß-sitosterol and determined that phytosterol oxidation products (POP) have a similar but less potent toxicity compared to their cholesterol equivalents. In the present study, the cytotoxicity of the oxidized derivatives of stigmasterol were investigated in the U937 cell line. The stigmasta-5,22-diene-3ß,7ß-diol (7ß-OH), 5,6-epoxystigmasta-22,23-diol (epoxydiol), 5,6,22,23-diepoxystigmastane (diepoxide), and (22R,23R)-stigmast-5-ene-3ß,22,23-triol (22R,23R-triol) derivatives were identified as the most cytotoxic, and the mode of cell death was identified as apoptosis in cells incubated with 7ß-OH, epoxydiol, and diepoxide stigmasterol. The antioxidants a-tocopherol, ¿-tocopherol, and ß-carotene did not protect against apoptosis induced by 7ß-OH and diepoxide stigmasterol; however, a-tocopherol was found to protect against epoxydiol-induced apoptosis. The cellular antioxidant, glutathione, was depleted and the apoptotic protein, Bcl-2, was down-regulated by the stigmasterol oxides identified as apoptotic.}},
   = {10.1021/jf1023017},
  source = {IRIS}
}
AUTHORSO'Callaghan YC, Foley DA, O'Connell NM, McCarthy FO, Maguire AR, O'Brien NM
YEAR2010
MONTHSeptember
JOURNAL_CODEJournal of Agricultural and Food Chemistry
TITLECytotoxic and Apoptotic Effects of the Oxidized Derivatives of Stigmasterol in the U937 Human Monocytic Cell Line.
STATUSValidated
TIMES_CITED()
SEARCH_KEYWORD
VOLUME58
ISSUE
START_PAGE10793
END_PAGE10798
ABSTRACTDietary exposure to phytosterols has increased in recent years due to the incorporation of these compounds into cholesterol-lowering products. Previous studies have investigated the cytotoxic effects of the oxidized derivatives of ß-sitosterol and determined that phytosterol oxidation products (POP) have a similar but less potent toxicity compared to their cholesterol equivalents. In the present study, the cytotoxicity of the oxidized derivatives of stigmasterol were investigated in the U937 cell line. The stigmasta-5,22-diene-3ß,7ß-diol (7ß-OH), 5,6-epoxystigmasta-22,23-diol (epoxydiol), 5,6,22,23-diepoxystigmastane (diepoxide), and (22R,23R)-stigmast-5-ene-3ß,22,23-triol (22R,23R-triol) derivatives were identified as the most cytotoxic, and the mode of cell death was identified as apoptosis in cells incubated with 7ß-OH, epoxydiol, and diepoxide stigmasterol. The antioxidants a-tocopherol, ¿-tocopherol, and ß-carotene did not protect against apoptosis induced by 7ß-OH and diepoxide stigmasterol; however, a-tocopherol was found to protect against epoxydiol-induced apoptosis. The cellular antioxidant, glutathione, was depleted and the apoptotic protein, Bcl-2, was down-regulated by the stigmasterol oxides identified as apoptotic.
PUBLISHER_LOCATION
ISBN_ISSN
EDITION
URL
DOI_LINK10.1021/jf1023017
FUNDING_BODY
GRANT_DETAILS