Brain xanthophyll content and exploratory gene expression analysis: Subspecies differences in rhesus macaque

Emily S. Mohn, John W. Erdman, Martha Neuringer, Matthew J. Kuchan, Elizabeth J. Johnson

    Research output: Contribution to journalArticle

    4 Citations (Scopus)

    Abstract

    Background: The dietary xanthophylls, lutein and zeaxanthin, accumulate in primate retina and brain, and emerging evidence indicates neural lutein content may be beneficial for cognition. Neural xanthophyll content in primates varies greatly among individuals, and genetic factors are likely to be significant contributors. Subspecies of rhesus macaques originating from different geographic locations are known to differ genetically, but the effect of origin on gene expression and carotenoid status has not been determined. The study objective was to determine whether xanthophyll status and expression of carotenoid-related genes, as well as genes with known variants between subspecies, differ between the brains of adult rhesus monkeys of Indian and Chinese origin. Methods: Samples of prefrontal cortex, cerebellum, and striatum were collected from adult monkeys (n = 9) fed a standard stock diet containing carotenoids. Serum and brain carotenoids were determined using reverse-phase high-performance liquid chromatography. For each brain region, RNA sequencing and real-time quantitative polymerase chain reaction were used to determine differentially expressed genes between the subspecies. Results: Indian-origin monkeys had higher xanthophyll levels in brain tissue compared to Chinese-origin monkeys despite consuming similar amounts of dietary carotenoids. In a region-specific manner, four genes related to carotenoid and fatty acid metabolism (BCO2, RPE65, ELOVL4, FADS2) and four genes involved in the immune response (CD4, CD74, CXCL12 LTBR) were differentially expressed between Indian- and Chinese-origin monkeys. Expression of all four genes involved in carotenoid and fatty acid metabolism were correlated with brain xanthophyll concentration in a region-specific manner. Conclusions: These results indicate that origin is related to differences in both gene expression and xanthophyll content in the brain. Findings from this study may have important implications regarding genetic diversity, lutein status, and cognition in primates.

    Original languageEnglish (US)
    Article number9
    JournalGenes and Nutrition
    Volume12
    Issue number1
    DOIs
    StatePublished - Mar 8 2017

    Fingerprint

    Xanthophylls
    Carotenoids
    Macaca mulatta
    Gene Expression
    Lutein
    Brain
    Haplorhini
    Primates
    Genes
    Cognition
    Fatty Acids
    RNA Sequence Analysis
    Geographic Locations
    Reverse-Phase Chromatography
    Prefrontal Cortex
    Cerebellum
    Retina
    Real-Time Polymerase Chain Reaction
    High Pressure Liquid Chromatography
    Diet

    Keywords

    • Brain
    • Lutein
    • Rhesus monkey
    • RNA-sequencing
    • Subspecies
    • Zeaxanthin

    ASJC Scopus subject areas

    • Endocrinology, Diabetes and Metabolism
    • Genetics

    Cite this

    Brain xanthophyll content and exploratory gene expression analysis : Subspecies differences in rhesus macaque. / Mohn, Emily S.; Erdman, John W.; Neuringer, Martha; Kuchan, Matthew J.; Johnson, Elizabeth J.

    In: Genes and Nutrition, Vol. 12, No. 1, 9, 08.03.2017.

    Research output: Contribution to journalArticle

    Mohn, Emily S. ; Erdman, John W. ; Neuringer, Martha ; Kuchan, Matthew J. ; Johnson, Elizabeth J. / Brain xanthophyll content and exploratory gene expression analysis : Subspecies differences in rhesus macaque. In: Genes and Nutrition. 2017 ; Vol. 12, No. 1.
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    abstract = "Background: The dietary xanthophylls, lutein and zeaxanthin, accumulate in primate retina and brain, and emerging evidence indicates neural lutein content may be beneficial for cognition. Neural xanthophyll content in primates varies greatly among individuals, and genetic factors are likely to be significant contributors. Subspecies of rhesus macaques originating from different geographic locations are known to differ genetically, but the effect of origin on gene expression and carotenoid status has not been determined. The study objective was to determine whether xanthophyll status and expression of carotenoid-related genes, as well as genes with known variants between subspecies, differ between the brains of adult rhesus monkeys of Indian and Chinese origin. Methods: Samples of prefrontal cortex, cerebellum, and striatum were collected from adult monkeys (n = 9) fed a standard stock diet containing carotenoids. Serum and brain carotenoids were determined using reverse-phase high-performance liquid chromatography. For each brain region, RNA sequencing and real-time quantitative polymerase chain reaction were used to determine differentially expressed genes between the subspecies. Results: Indian-origin monkeys had higher xanthophyll levels in brain tissue compared to Chinese-origin monkeys despite consuming similar amounts of dietary carotenoids. In a region-specific manner, four genes related to carotenoid and fatty acid metabolism (BCO2, RPE65, ELOVL4, FADS2) and four genes involved in the immune response (CD4, CD74, CXCL12 LTBR) were differentially expressed between Indian- and Chinese-origin monkeys. Expression of all four genes involved in carotenoid and fatty acid metabolism were correlated with brain xanthophyll concentration in a region-specific manner. Conclusions: These results indicate that origin is related to differences in both gene expression and xanthophyll content in the brain. Findings from this study may have important implications regarding genetic diversity, lutein status, and cognition in primates.",
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    AU - Erdman, John W.

    AU - Neuringer, Martha

    AU - Kuchan, Matthew J.

    AU - Johnson, Elizabeth J.

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    AB - Background: The dietary xanthophylls, lutein and zeaxanthin, accumulate in primate retina and brain, and emerging evidence indicates neural lutein content may be beneficial for cognition. Neural xanthophyll content in primates varies greatly among individuals, and genetic factors are likely to be significant contributors. Subspecies of rhesus macaques originating from different geographic locations are known to differ genetically, but the effect of origin on gene expression and carotenoid status has not been determined. The study objective was to determine whether xanthophyll status and expression of carotenoid-related genes, as well as genes with known variants between subspecies, differ between the brains of adult rhesus monkeys of Indian and Chinese origin. Methods: Samples of prefrontal cortex, cerebellum, and striatum were collected from adult monkeys (n = 9) fed a standard stock diet containing carotenoids. Serum and brain carotenoids were determined using reverse-phase high-performance liquid chromatography. For each brain region, RNA sequencing and real-time quantitative polymerase chain reaction were used to determine differentially expressed genes between the subspecies. Results: Indian-origin monkeys had higher xanthophyll levels in brain tissue compared to Chinese-origin monkeys despite consuming similar amounts of dietary carotenoids. In a region-specific manner, four genes related to carotenoid and fatty acid metabolism (BCO2, RPE65, ELOVL4, FADS2) and four genes involved in the immune response (CD4, CD74, CXCL12 LTBR) were differentially expressed between Indian- and Chinese-origin monkeys. Expression of all four genes involved in carotenoid and fatty acid metabolism were correlated with brain xanthophyll concentration in a region-specific manner. Conclusions: These results indicate that origin is related to differences in both gene expression and xanthophyll content in the brain. Findings from this study may have important implications regarding genetic diversity, lutein status, and cognition in primates.

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    KW - Zeaxanthin

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