Show simple item record

dc.contributor.authorEsterhuyse, AJen_US
dc.contributor.authorToit, EFen_US
dc.contributor.authorvan Rooyen, Jen_US
dc.date.accessioned2017-04-24T13:06:05Z
dc.date.available2017-04-24T13:06:05Z
dc.date.issued2005en_US
dc.identifier.issn09647058en_US
dc.identifier.urihttp://hdl.handle.net/10072/27768
dc.description.abstractActivation of the NO-cGMP pathway is associated with myocardial protection against ischemia. During ischemia, function of this pathway is disturbed. Little is known about the effects of supplements such as Red Palm Oil (RPO) on the myocardial NO- cGMP- signalling pathway. RPO consists of saturated (SFAs), monounsaturated (MUFAs) and polyunsaturated (PUFAs) fatty acids and is an antioxidant rich in natural B-carotene and vitamin E (tocopherols and tocotrienols). This study determined whether dietary RPO-supplemention protects against the consequences of ischemia and identified a possible mechanism for this protection. Long-Evans rats were fed a control diet or control diet plus 7g RPO per kg diet for six weeks. Hearts were excised and mounted on a working heart perfusion apparatus. Cardiac function was measured before and after hearts were subjected to 25 minutes of global ischemia. Left ventricular systolic (LVSP) and diastolic pressure (LVDP), coronary flow (CF), heart rate (HR) and aortic output (AO) were measured. To assess NO-cGMP pathway activity, hearts subjected to the same conditions, were freeze-clamped and analysed for tissue cAMP and cGMP levels using a RIA method. Furthermore, composition of myocardial phospholipid fatty acids by gaschromatography and blood samples were collected for serum lipid determinations. The percentage aortic output recovery of hearts supplemented with RPO was 72.9 ᠳ.43 % vs 55.4 ᠲ.48 % for controls (P < 0.05). Ten minutes into ischemia the cGMP levels of the RPO-supplementation group were significantly higher than the control group (26.5 ᠲ.78 pmol/g vs 10.1 ᠱ.78 pmol/g. Total myocardial PUFA content in hearts supplemented with RPO increased from 54.45 ᠱ.11% before ischemia to 59.03 ᠰ.30 % after ischemia (P<0.05). Results demonstrated that RPO-supplementation protected hearts against the consequences of ischemia/reperfusion injury. These findings suggest that dietary RPO protects via the NO-cGMP pathway and/or changes in PUFA composition during ischemia/reperfusion.en_US
dc.description.peerreviewedYesen_US
dc.description.publicationstatusYesen_US
dc.languageEnglishen_US
dc.language.isoen_US
dc.publisherHEC Pressen_US
dc.publisher.placeAustraliaen_US
dc.publisher.urihttp://apjcn.nhri.org.tw/en_US
dc.relation.ispartofstudentpublicationNen_US
dc.relation.ispartofpagefrom340en_US
dc.relation.ispartofpageto347en_US
dc.relation.ispartofissue4en_US
dc.relation.ispartofjournalAsia Pacific Journal of Clinical Nutritionen_US
dc.relation.ispartofvolume14en_US
dc.rights.retentionYen_US
dc.subject.fieldofresearchCardiology (incl. Cardiovascular Diseases)en_US
dc.subject.fieldofresearchcode110201en_US
dc.titleDietary red palm oil supplementation protects against the consequences of global ischemia in the isolated perfused rat hearten_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
gro.date.issued2015-05-31T22:20:51Z
gro.hasfulltextNo Full Text


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

  • Journal articles
    Contains articles published by Griffith authors in scholarly journals.

Show simple item record