Extended longevity of wild-derived mice is associated with peroxidation-resistant membranes.
Two lines of mice, Idaho (Id) and Majuro (Ma), both derived from wild-trapped progenitors, have previously been shown to have extended lifespans in captivity when compared to a genetically heterogenous laboratory line of mice (DC). We have examined whether membrane fatty composition varies with lifespan within the species Mus musculus in a similar manner to that previously demonstrated between mammal species. Muscle and liver phospholipids from these long-living mice lines have a reduced amount of the highly polyunsaturated omega-3 docosahexaenoic acid compared to the DC mice, and consequently their membranes are less likely to peroxidative damage. The relationship between maximum longevity and membrane peroxidation index is similar for these mice lines as previously observed for mammals in general. It is suggested that peroxidation-resistant membranes may be an important component of extended longevity.
Hulbert
A J
AJ
Metabolic Research Centre, University of Wollongong, Wollongong, NSW 2522, Australia. hulbert@uow.edu.au
Faulks
Sally C
SC
Harper
James M
JM
Miller
Richard A
RA
Buffenstein
Rochelle
R
D000818:Animals; D005227:Fatty Acids / Q000032:analysis; D015525:Fatty Acids, Omega-3 / Q000032:analysis; D015227:Lipid Peroxidation; D008099:Liver / Q000737:chemistry; D008136:Longevity / Q000235:genetics*; D051379:Mice; D018482:Muscle, Skeletal / Q000737:chemistry; D010743:Phospholipids / Q000737:chemistry*; D013045:Species Specificity
D005227:Fatty Acids; D015525:Fatty Acids, Omega-3; D010743:Phospholipids