Journal
ONCOTARGET
Volume 7, Issue 35, Pages 55970-55989Publisher
IMPACT JOURNALS LLC
DOI: 10.18632/oncotarget.11190
Keywords
aging; lipidomics; Rhesus macaques; docosahexaenoic acids; polyunsaturated fatty acids
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Funding
- 100 Talents Program of Chinese Academy of Sciences
- National Natural Science Foundation of China [31371515, 31130051, 3150040263]
- National Basic Research Program of China (973 Program) [2012CB825504]
- Chinese Academy of Sciences [XDA04020413-02, XDB13010000]
- Special Financial Grant awarded
- China Postdoctoral Science Foundation [2014T70137]
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Lipidomic analyses of the frontal cortex of Rhesus macaques across three selected age groups (young, sexually-mature, old) revealed that docosahexaenoic acids (DHAs) displayed notable and unique accretions in sexually-mature macaques for all phospholipid classes examined, which were not observable in all remaining polyunsaturated fatty acids (PUFAs) investigated. On the other hand, arachidonic acid (ARA) exhibited sharp attritions in the membrane lipidomes of sexually-mature macaques, a decline which was attenuated only for cardiolipins (CLs). DHA enrichment in phospholipids was lost in old macaques, with accompanying augmentations in very-long-chain sphingomyelins (VLC-SMs). Age-dependent alterations in membrane lipidomes point to a possibly complex temporal interplay between DHA-enriched membrane microdomains and SM-/ cholesterol-rich rafts in neural membranes during normative aging. Lipid co-regulation data revealed an increasingly intense degree of co-regulation between membrane lipid classes with age, and suggest that reduction in CLs during normative brain aging may prompt alternative membrane lipid synthetic pathways driven by a compromised energy availability in the aging brain.
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