| Literature DB >> 18492647 |
William A Buttemer1, Harry Battam, A J Hulbert.
Abstract
The membrane pacemaker hypothesis predicts that long-living species will have more peroxidation-resistant membrane lipids than shorter living species. We tested this hypothesis by comparing the fatty acid composition of heart phospholipids from long-living Procellariiformes (petrels and albatrosses) to those of shorter living Galliformes (fowl). The seabirds were obtained from by-catch of commercial fishing operations and the fowl values from published data. The 3.8-fold greater predicted longevity of the seabirds was associated with elevated content of peroxidation-resistant monounsaturates and reduced content of peroxidation-prone polyunsaturates and, consequently, a significantly reduced peroxidation index in heart membrane lipids, compared with fowl. Peroxidation-resistant membrane composition may be an important physiological trait for longevous species.Entities:
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Year: 2008 PMID: 18492647 PMCID: PMC2610141 DOI: 10.1098/rsbl.2008.0145
Source DB: PubMed Journal: Biol Lett ISSN: 1744-9561 Impact factor: 3.703