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https://www.readbyqxmd.com/read/29161349/relation-of-retinal-and-serum-lutein-and-zeaxanthin-to-white-matter-integrity-in-older-adults-a-diffusion-tensor-imaging-study
#1
Catherine M Mewborn, Douglas P Terry, Lisa M Renzi-Hammond, Billy R Hammond, L Stephen Miller
Objective: Lutein (L) and zeaxanthin (Z) are phytonutrients that accumulate in human brain tissue and positively impact cognition. Given their antioxidant and anti-inflammatory properties and their role in stabilizing cell membranes, L&Z may relate to measures of white matter integrity (WMI). Method: The current study tested the relation of retinal (macular pigment optical density/MPOD) and blood serum concentrations of L&Z to WMI in community-dwelling older adults (n = 54) using diffusion tensor imaging (DTI)...
November 17, 2017: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
https://www.readbyqxmd.com/read/29135938/effects-of-a-lutein-and-zeaxanthin-intervention-on-cognitive-function-a-randomized-double-masked-placebo-controlled-trial-of-younger-healthy-adults
#2
Lisa M Renzi-Hammond, Emily R Bovier, Laura M Fletcher, L Stephen Miller, Catherine M Mewborn, Cutter A Lindbergh, Jeffrey H Baxter, Billy R Hammond
Background: Past studies have suggested that higher lutein (L) and zeaxanthin (Z) levels in serum and in the central nervous system (as quantified by measuring macular pigment optical density, MPOD) are related to improved cognitive function in older adults. Very few studies have addressed the issue of xanthophylls and cognitive function in younger adults, and no controlled trials have been conducted to date to determine whether or not supplementation with L + Z can change cognitive function in this population...
November 14, 2017: Nutrients
https://www.readbyqxmd.com/read/28982957/macular-pigment-is-associated-with-glare-affected-visual-function-and-central-visual-field-loss-in-glaucoma
#3
We Fong Siah, Colm O'Brien, James J Loughman
AIM: To evaluate the relationship between macular pigment optical density (MPOD) and glare disability in open-angle glaucoma. METHODS: A cross-sectional analysis of baseline data (88 subjects; median age, 67 (range 36-84) years) collected during the Macular Pigment and Glaucoma Trial (ISRCTN registry number: 56985060). MPOD at 0.25°, 0.5° and 1° of retinal eccentricity was measured using customised heterochromatic flicker photometry. Mesopic contrast sensitivity with glare (mCSg), photostress recovery time (PRT) and self-reported glare symptoms were evaluated...
October 5, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28973076/effect-of-dietary-supplementation-with-lutein-zeaxanthin-and-%C3%AF-3-on-macular-pigment-a-randomized-clinical-trial
#4
Jean-François Korobelnik, Marie-Bénédicte Rougier, Marie-Noëlle Delyfer, Alain Bron, Bénédicte M J Merle, Hélène Savel, Geneviève Chêne, Cécile Delcourt, Catherine Creuzot-Garcher
Importance: Nutritional uptake of lutein, zeaxanthin, and ω-3 polyunsaturated fatty acids may increase macular pigment optical density (MPOD) and thereby protect against the development of age-related macular degeneration (AMD). Objectives: To estimate the efficiency of dietary supplementation containing lutein, zeaxanthin, ω-3 polyunsaturated fatty acids, and vitamins to increase the density of macular pigment in first-generation offspring of parents with neovascular AMD...
November 1, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28957818/epilutein-for-early-stage-age-related-macular-degeneration-a-randomized-and-prospective-study
#5
Raimondo Forte, Lucia Panzella, Ida Cesarano, Gilda Cennamo, Thomas Eidenberger, Alessandra Napolitano
PURPOSE: The hypothesis that oral supplementation of the epilutein/lutein combination could augment the macular pigment optical density (MPOD) in patients with age-related macular degeneration (AMD) was tested. METHODS: In a prospective randomized interventional study, 40 consecutive patients with early-stage AMD were recruited. After a 2-week run-in period, patients were randomly treated with a daily oral administration of 8 mg epilutein and 2 mg lutein (group 1) or 10 mg lutein (group 2) for 2 months...
2017: Ophthalmic Research
https://www.readbyqxmd.com/read/28880221/the-macular-carotenoids-lutein-and-zeaxanthin-are-related-to-increased-bone-density-in-young-healthy-adults
#6
Emily R Bovier, Billy R Hammond
Lutein (L) and zeaxanthin (Z) status can be quantified by measuring their concentrations both in serum and, non-invasively, in retinal tissue. This has resulted in a unique ability to assess their role in a number of tissues ranging from cardiovascular to central nervous system tissue. Recent reports using animal models have suggested yet another role, a developmental increase in bone mass. To test this, we assessed L and Z status in 63 young healthy adults. LZ status was determined by measuring LZ in serum (using HPLC) and retina tissue (measuring macular pigment optical density, MPOD, using customized heterochromatic flicker photometry)...
September 7, 2017: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28851319/absolute-and-estimated-values-of-macular-pigment-optical-density-in-young-and-aged-asian-participants-with-or-without-age-related-macular-degeneration
#7
Yoko Ozawa, Yuta Shigeno, Norihiro Nagai, Misa Suzuki, Toshihide Kurihara, Sakiko Minami, Eri Hirano, Hajime Shinoda, Saori Kobayashi, Kazuo Tsubota
BACKGROUND: Lutein and zeaxanthin are suggested micronutrient supplements to prevent the progression of age-related macular degeneration (AMD), a leading cause of blindness worldwide. To monitor the levels of lutein/zeaxanthin in the macula, macular pigment optical density (MPOD) is measured. A commercially available device (MPSII®, Elektron Technology, Switzerland), using technology based on heterochromatic flicker photometry, can measure both absolute and estimated values of MPOD. However, whether the estimated value is applicable to Asian individuals and/or AMD patients remains to be determined...
August 29, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28728169/correlations-between-macular-skin-and-serum-carotenoids
#8
Christopher D Conrady, James P Bell, Brian M Besch, Aruna Gorusupudi, Kelliann Farnsworth, Igor Ermakov, Mohsen Sharifzadeh, Maia Ermakova, Werner Gellermann, Paul S Bernstein
Purpose: Ocular and systemic measurement and imaging of the macular carotenoids lutein and zeaxanthin have been employed extensively as potential biomarkers of AMD risk. In this study, we systematically compare dual wavelength retinal autofluorescence imaging (AFI) of macular pigment with skin resonance Raman spectroscopy (RRS) and serum carotenoid levels in a clinic-based population. Methods: Eighty-eight patients were recruited from retina and general ophthalmology practices from a tertiary referral center and excluded only if they did not have all three modalities tested, had a diagnosis of macular telangiectasia (MacTel) or Stargardt disease, or had poor AFI image quality...
July 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28722118/at2-r-deficiency-mediated-podocyte-loss-via-activation-of-ectopic-hedgehog-interacting-protein-hhip-gene-expression
#9
Min-Chun Liao, Xin-Ping Zhao, Shiao-Ying Chang, Chao-Sheng Lo, Isabelle Chenier, Tomoko Takano, Julie R Ingelfinger, Shao-Ling Zhang
Angiotensin II type 2 receptor (AT2 R) deficiency in AT2 R knockout (KO) mice has been linked to congenital abnormalities of the kidney and urinary tract; however, the mechanisms by which this occurs are poorly understood. In this study, we examined whether AT2 R deficiency impaired glomerulogenesis and mediated podocyte loss/dysfunction in vivo and in vitro. Nephrin-cyan fluorescent protein (CFP)-transgenic (Tg) and Nephrin/AT2 RKO mice were used to assess glomerulogenesis, while wild-type and AT2 RKO mice were used to evaluate maturation of podocyte morphology/function...
November 2017: Journal of Pathology
https://www.readbyqxmd.com/read/28661438/macular-carotenoid-supplementation-improves-visual-performance-sleep-quality-and-adverse-physical-symptoms-in-those-with-high-screen-time-exposure
#10
James M Stringham, Nicole T Stringham, Kevin J O'Brien
The dramatic rise in the use of smartphones, tablets, and laptop computers over the past decade has raised concerns about potentially deleterious health effects of increased "screen time" (ST) and associated short-wavelength (blue) light exposure. We determined baseline associations and effects of 6 months' supplementation with the macular carotenoids (MC) lutein, zeaxanthin, and mesozeaxanthin on the blue-absorbing macular pigment (MP) and measures of sleep quality, visual performance, and physical indicators of excessive ST...
June 29, 2017: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28649198/the-role-of-retinal-carotenoids-and-age-on-neuroelectric-indices-of-attentional-control-among-early-to-middle-aged-adults
#11
Anne M Walk, Caitlyn G Edwards, Nicholas W Baumgartner, Morgan R Chojnacki, Alicia R Covello, Ginger E Reeser, Billy R Hammond, Lisa M Renzi-Hammond, Naiman A Khan
One apparent consequence of aging appears to be loss of some aspects of cognitive control. This loss is measurable as early as mid-adulthood. Since, like many aspects of cognition, there is wide variance among individuals, it is possible that behavior, such as one's diet, could drive some of these differences. For instance, past data on older humans and non-human primates have suggested that dietary carotenoids could slow cognitive decline. In this study, we tested how early such protection might manifest by examining a sample (n = 60) of 25-45 year olds...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28643712/comparison-of-macular-pigment-optical-density-in-patients-with-dry-and-wet-age-related-macular-degeneration
#12
COMPARATIVE STUDY
Ayhan Ozyurt, Nilufer Kocak, Pınar Akan, Ozlem Gursoy Calan, Taylan Ozturk, Mahmut Kaya, Eyup Karahan, Suleyman Kaynak
AIM: The aim of the study was to evaluate the macular pigment optical density (MPOD) levels in patients with wet age-related macular degeneration (AMD), dry AMD, and also in healthy controls. SETTINGS AND DESIGN: This study was conducted at Department of Ophthalmology, and the study design was a prospective study. PATIENTS AND METHODS: Forty-eight patients with wet AMD, 51 patients with dry AMD, and 50 controls were included in the study. All patients were naive to both previous lutein or zeaxanthin administration and any previous intravitreal injections...
June 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28535707/macular-pigment-optical-density-is-positively-associated-with-academic-performance-among-preadolescent-children
#13
Sasha M Barnett, Naiman A Khan, Anne M Walk, Lauren B Raine, Christopher Moulton, Neal J Cohen, Arthur F Kramer, Billy R Hammond, Lisa Renzi-Hammond, Charles H Hillman
OBJECTIVE: Macular pigment optical density (MPOD) - a non-invasive indicator of retinal xanthophylls and correlate of brain lutein - has been associated with superior cognitive function among adult populations. Given that lutein accumulation in the brain occurs in early life, it is possible that the cognitive implications of greater MPOD may be evident in childhood. METHODS: Participants aged 8-9 years (n = 56) completed MPOD measurements via heterochromatic flicker photometry...
May 23, 2017: Nutritional Neuroscience
https://www.readbyqxmd.com/read/28528704/from-neuro-pigments-to-neural-efficiency-the-relationship-between-retinal-carotenoids-and-behavioral-and-neuroelectric-indices-of-cognitive-control-in-childhood
#14
Anne M Walk, Naiman A Khan, Sasha M Barnett, Lauren B Raine, Arthur F Kramer, Neal J Cohen, Christopher J Moulton, Lisa M Renzi-Hammond, Billy R Hammond, Charles H Hillman
Lutein and zeaxanthin are plant pigments known to preferentially accumulate in neural tissue. Macular Pigment Optical Density (MPOD), a non-invasive measure of retinal carotenoids and surrogate measure of brain carotenoid concentration, has been associated with disease prevention and cognitive health. Superior MPOD status in later adulthood has been shown to provide neuroprotective effects on cognition. Given that childhood signifies a critical period for carotenoid accumulation in brain, it is likely that the beneficial impact would be evident during development, though this relationship has not been directly investigated...
August 2017: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/28431432/contrast-sensitivity-and-lateral-inhibition-are-enhanced-with-macular-carotenoid-supplementation
#15
RANDOMIZED CONTROLLED TRIAL
James M Stringham, Kevin J O'Brien, Nicole T Stringham
Purpose: Once deposited in the retina, the so-called macular carotenoids lutein (L), zeaxanthin (Z), and mesozeaxanthin (MZ) have been shown to enhance visual performance. The purpose of our study was to investigate whether increasing macular pigment optical density (MPOD) could enhance lateral inhibitory processes, and thereby improve contrast sensitivity (CS). Methods: A total of 59 young (18-25 years), healthy individuals participated in this 1-year, double-masked, placebo-controlled study...
April 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28426871/macular-pigment-density-and-quantitative-fundus-autofluorescence-in-young-healthy-subjects
#16
Chiara M Eandi, Marco Nassisi, Carlo Lavia, Camilla Alovisi, Ugo de Sanctis
Purpose: To measure macular pigment (MP) and find possible correlation between heterochromatic flicker photometry (HFP) and quantitative autofluorescence (qAF) in young healthy subjects. Methods: We enrolled 80 eyes of 40 young healthy subjects. Macular pigment optical density (MPOD) was automatically calculated with a macular pigment screener (MPS; MPODHFP). We calculated qAF comparing gray levels (GL) of qAF images with GL of internal reference of a confocal scanning laser ophthalmoscopy...
April 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28336284/macular-pigment-density-variation-after-supplementation-of-lutein-and-zeaxanthin-using-the-visucam-%C3%A2-200-pigment-module-impact-of-age-related-macular-degeneration-and-lens-status
#17
RANDOMIZED CONTROLLED TRIAL
G Azar, M Quaranta-El Maftouhi, J-J Masella, M Mauget-Faÿsse
PURPOSE: To assess the evolution of macular pigment optical density (MPOD) following supplementation with various macular formulations obtained with the Visucam(®) 200, and to study the factors affecting MPOD measurements. MATERIALS AND METHODS: In this prospective, randomized, double-masked multicenter study, patients were divided into 2 groups: group A (patients without retinal pathology who underwent cataract surgery 1 month previously) and group B (patients with neovascular age-related macular degeneration [AMD] in one eye)...
April 2017: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/28271618/plasma-long-chain-omega-3-polyunsaturated-fatty-acids-and-macular-pigment-in-subjects-with-family-history-of-age-related-macular-degeneration-the-limpia-study
#18
Bénédicte M J Merle, Benjamin Buaud, Jean-François Korobelnik, Alain Bron, Marie-Noëlle Delyfer, Marie-Bénédicte Rougier, Hélène Savel, Carole Vaysse, Catherine Creuzot-Garcher, Cécile Delcourt
PURPOSE: In numerous epidemiological studies, omega-3 polyunsaturated fatty acids (PUFAs) have been associated with a decreased risk of age-related macular degeneration (AMD). Beyond their structural, functional and neuroprotective roles, omega-3 PUFAs may favour the retinal accumulation of lutein and zeaxanthin and thus increase macular pigment optical density (MPOD). We examined the associations of MPOD with plasma omega-3 PUFAs in subjects with family history of AMD. METHODS: The Limpia study is a double-blind, placebo-controlled, prospective randomized clinical trial performed in 120 subjects...
March 8, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28231126/macular-pigment-optical-density-and-measures-of-macular-function-test-retest-variability-cross-sectional-correlations-and-findings-from-the-zeaxanthin-pilot-study-of-response-to-supplementation-zeastress-pilot
#19
Alessandro Iannaccone, Giovannella Carboni, Gina Forma, Maria Giulia Mutolo, Barbara J Jennings
We report on the short-term test-retest baseline variability in macular function tests in ZEASTRESS-Pilot participants (n = 18), on their cross-sectional correlation with macular pigment optical density (MPOD), and on the effects of four months (FUV4) of 20 mg/day zeaxanthin (ZX), followed by a four-month washout (FUV8; n = 24, age 50-81 years old). Outcomes included: MPOD at 0.5 and 2.0 deg eccentricity (MPOD-0.5 and -2.0); contrast sensitivity (CS); pattern-reversal electroretinogram (PERG) amplitude; dark-adapted 650 nm foveal cone sensitivity (DA650-FCS); and 500 mn parafoveal rod sensitivity (DA500-PFRS)...
April 29, 2016: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28198205/supplementation-with-macular-carotenoids-reduces-psychological-stress-serum-cortisol-and-sub-optimal-symptoms-of-physical-and-emotional-health-in-young-adults
#20
Nicole Tressa Stringham, Philip V Holmes, James M Stringham
PURPOSE: Oxidative stress and systemic inflammation are the root cause of several deleterious effects of chronic psychological stress. We hypothesize that the antioxidant and anti-inflammatory capabilities of the macular carotenoids (MCs) lutein, zeaxanthin, and meso-zeaxanthin could, via daily supplementation, provide a dietary means of benefit. METHODS: A total of 59 young healthy subjects participated in a 12-month, double-blind, placebo-controlled trial to evaluate the effects of MC supplementation on blood cortisol, psychological stress ratings, behavioural measures of mood, and symptoms of sub-optimal health...
February 15, 2017: Nutritional Neuroscience
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