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Sanlier N, Yildiz E, Ozler E. An Overview on the Effects of Some Carotenoids on Health: Lutein and Zeaxanthin. Curr Nutr Rep 2024:10.1007/s13668-024-00579-z. [PMID: 39304612 DOI: 10.1007/s13668-024-00579-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/04/2024] [Indexed: 09/22/2024]
Abstract
PURPOSE OF REVIEW In this review, the chemical properties, nutritional sources, absorption mechanisms, metabolism, biosynthesis and promising health-related benefits of lutein and zeaxanthin were emphasized and some recommendations for the future studies are suggested. RECENT FINDINGS Lutein and zeaxanthin are phytochemical compounds in the carotenoid group and are synthesised only by plants. All mammals get lutein and zeaxanthin into their bodies by consuming plant-based foods. Especially leafy green vegetables, broccoli, pumpkin, cabbage, spinach and egg yolk are rich in lutein and zeaxanthin. Lutein and zeaxanthin have potential health effects by preventing free radical formation, exhibiting protective properties against oxidative damage and reducing oxidative stress. These compounds have neuroprotective, cardioprotective, ophthalmological, antioxidant, anti-inflammatory, anti-cancer, anti-osteoporosis, anti-diabetic, anti-obesity, and antimicrobial effects. The preventive properties of lutein and zeaxanthin against numerous diseases have attracted attention recently. Further clinical trials with large samples are needed to make generalisations in the prevention and treatment of diseases and to determine the appropriate doses and forms of lutein and zeaxanthin.
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Affiliation(s)
- Nevin Sanlier
- Department of Nutrition and Dietetics, School of Health Sciences, Ankara Medipol University, 06050, Altındağ, Ankara, Turkey.
| | - Elif Yildiz
- Department of Nutrition and Dietetics, School of Health Sciences, Ankara Medipol University, 06050, Altındağ, Ankara, Turkey
| | - Ebru Ozler
- Department of Nutrition and Dietetics, School of Health Sciences, Ankara Medipol University, 06050, Altındağ, Ankara, Turkey
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2
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Udensi J, Loskutova E, Loughman J, Byrne HJ. Raman spectroscopic analysis of human blood serum of glaucoma patients supplemented with macular pigment carotenoids. JOURNAL OF BIOPHOTONICS 2024; 17:e202400060. [PMID: 38937976 DOI: 10.1002/jbio.202400060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 04/17/2024] [Accepted: 04/30/2024] [Indexed: 06/29/2024]
Abstract
As all major dietary carotenoids are contained in blood, it is a suitable substrate to evaluate their content, in vivo. Following 18-month supplementation of open-angle glaucoma patients with macula-pigment carotenoids (Lutein, Zeaxanthin and Meso-Zeaxanthin) in the European Nutrition in Glaucoma Management trial, Raman spectroscopic analysis of the carotenoid content of pre- and post-supplementation participant blood serum was carried out, to investigate the systemic impact of the supplementation regimen and explore a more direct way of quantifying this impact using routine blood tests. Using a 532 nm laser source for optimal response, a consistent increase in serum carotenoid concentration was observed in the supplemented serum, highest in patients with initial high baseline carotenoid content. A shift in the 1519 cm-1 carotenoid peak also revealed differences in the carotenoid structural profile of the two groups. The findings highlight the potential of Raman spectroscopy toquantify and differentiate carotenoids directly in blood serum.
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Affiliation(s)
- Joy Udensi
- FOCAS Research Institute, Technological University Dublin, Dublin, Ireland
- School of Physics and Clinical and Optometric Sciences, Technological University Dublin, Dublin, Ireland
- Centre for Eye Research, Ireland, Technological University Dublin, Dublin, Ireland
| | - Ekaterina Loskutova
- School of Physics and Clinical and Optometric Sciences, Technological University Dublin, Dublin, Ireland
- Centre for Eye Research, Ireland, Technological University Dublin, Dublin, Ireland
| | - James Loughman
- School of Physics and Clinical and Optometric Sciences, Technological University Dublin, Dublin, Ireland
- Centre for Eye Research, Ireland, Technological University Dublin, Dublin, Ireland
| | - Hugh J Byrne
- FOCAS Research Institute, Technological University Dublin, Dublin, Ireland
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Kumar P, Banik SP, Ohia SE, Moriyama H, Chakraborty S, Wang CK, Song YS, Goel A, Bagchi M, Bagchi D. Current Insights on the Photoprotective Mechanism of the Macular Carotenoids, Lutein and Zeaxanthin: Safety, Efficacy and Bio-Delivery. JOURNAL OF THE AMERICAN NUTRITION ASSOCIATION 2024; 43:505-518. [PMID: 38393321 DOI: 10.1080/27697061.2024.2319090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 02/11/2024] [Indexed: 02/25/2024]
Abstract
Ocular health has emerged as one of the major issues of global health concern with a decline in quality of life in an aging population, in particular and rise in the number of associated morbidities and mortalities. One of the chief reasons for vision impairment is oxidative damage inflicted to photoreceptors in rods and cone cells by blue light as well as UV radiation. The scenario has been aggravated by unprecedented rise in screen-time during the COVID and post-COVID era. Lutein and Zeaxanthin are oxygenated carotenoids with proven roles in augmentation of ocular health largely by virtue of their antioxidant properties and protective effects against photobleaching of retinal pigments, age-linked macular degeneration, cataract, and retinitis pigmentosa. These molecules are characterized by their characteristic yellow-orange colored pigmentation and are found in significant amounts in vegetables such as corn, spinach, broccoli, carrots as well as fish and eggs. Unique structural signatures including tetraterpenoid skeleton with extensive conjugation and the presence of hydroxyl groups at the end rings have made these molecules evolutionarily adapted to localize in the membrane of the photoreceptor cells and prevent their free radical induced peroxidation. Apart from the benefits imparted to ocular health, lutein and zeaxanthin are also known to improve cognitive function, cardiovascular physiology, and arrest the development of malignancy. Although abundant in many natural sources, bioavailability of these compounds is low owing to their long aliphatic backbones. Under the circumstances, there has been a concerted effort to develop vegetable oil-based carriers such as lipid nano-emulsions for therapeutic administration of carotenoids. This review presents a comprehensive update of the therapeutic potential of the carotenoids along with the challenges in achieving an optimized delivery tool for maximizing their effectiveness inside the body.
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Affiliation(s)
- Pawan Kumar
- R&D Department, Chemical Resources (CHERESO), Panchkula, India
| | - Samudra P Banik
- Department of Microbiology, Maulana Azad College, Kolkata, India
| | - Sunny E Ohia
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, Texas Southern University, Houston, TX, USA
| | - Hiroyoshi Moriyama
- Department of Scientific Affairs, The Japanese Institute for Health Food Standards, Tokyo, Japan
| | - Sanjoy Chakraborty
- Department of Biological Sciences, New York City College of Technology/CUNY, Brooklyn, NY, USA
| | - Chin-Kun Wang
- Department of Nutrition, Chung Shan Medical University, Taichung, Taiwan
| | - Yong Sang Song
- Department of Obstetrics and Gynaecology, Seoul National University Hospital, Seoul, South Korea
| | - Apurva Goel
- Regulation Department, Chemical Resources (CHERESO), Panchkula, India
| | | | - Debasis Bagchi
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, Texas Southern University, Houston, TX, USA
- Department of Biology, College of Arts and Sciences, and Department of Psychology, Gordon F. Derner School of Psychology, Adelphi University, Garden City, NY, USA
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Kulbay M, Wu KY, Nirwal GK, Bélanger P, Tran SD. The Role of Reactive Oxygen Species in Age-Related Macular Degeneration: A Comprehensive Review of Antioxidant Therapies. Biomedicines 2024; 12:1579. [PMID: 39062152 PMCID: PMC11274723 DOI: 10.3390/biomedicines12071579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2024] [Revised: 06/26/2024] [Accepted: 07/12/2024] [Indexed: 07/28/2024] Open
Abstract
This review article delves into the intricate roles of reactive oxygen species (ROS) in the pathogenesis of age-related macular degeneration (AMD). It presents a detailed analysis of the oxidative stress mechanisms that contribute to the development and progression of these diseases. The review systematically explores the dual nature of ROS in ocular physiology and pathology, underscoring their essential roles in cellular signaling and detrimental effects when in excess. In the context of AMD, the focus is on the oxidative impairment in the retinal pigment epithelium and Bruch's membrane, culminating in the deterioration of macular health. Central to this review is the evaluation of various antioxidant strategies in the prevention and management of AMD. It encompasses a wide spectrum of antioxidants, ranging from dietary nutrients like vitamins C and E, lutein, and zeaxanthin to pharmacological agents with antioxidative properties. The review also addresses novel therapeutic approaches, including gene therapy and nanotechnology-based delivery systems, aiming to enhance antioxidant defense mechanisms in ocular tissues. The article concludes by synthesizing current research findings, clinical trial data, and meta-analyses to provide evidence-based recommendations. It underscores the need for further research to optimize antioxidant therapies, considering individual patient factors and disease stages. This comprehensive review thus serves as a valuable resource for clinicians, researchers, and healthcare professionals in ophthalmology, offering insights into the potential of antioxidants in mitigating the burden of AMD.
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Affiliation(s)
- Merve Kulbay
- Department of Ophthalmology & Visual Sciences, McGill University, Montréal, QC H4A 3S5, Canada;
| | - Kevin Y. Wu
- Division of Ophthalmology, Department of Surgery, University of Sherbrooke, Sherbrooke, QC J1H 5N4, Canada; (K.Y.W.)
| | - Gurleen K. Nirwal
- Department of Zoology, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Paul Bélanger
- Division of Ophthalmology, Department of Surgery, University of Sherbrooke, Sherbrooke, QC J1H 5N4, Canada; (K.Y.W.)
| | - Simon D. Tran
- Faculty of Dental Medicine and Oral Health Sciences, McGill University, Montreal, QC H3A 1G1, Canada
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Takayanagi Y, Kadoh Y, Sasaki J, Obana A, Tanito M. Association between Skin Carotenoid Levels and Cognitive Impairment Screened by Mini-Cog in Patients with Glaucoma. Curr Issues Mol Biol 2024; 46:6940-6950. [PMID: 39057055 PMCID: PMC11275399 DOI: 10.3390/cimb46070413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2024] [Revised: 06/24/2024] [Accepted: 06/29/2024] [Indexed: 07/28/2024] Open
Abstract
Carotenoids, having strong antioxidant properties, have been associated with neurodegenerative conditions like dementia and glaucoma, characterized by neuronal loss leading to cognitive and visual dysfunction. Therefore, carotenoids have attracted attention as factors predictive of the onset and progression of these neurodegenerative diseases. However, the impact of carotenoids on cognitive impairment and glaucomatous visual field defects remains unexplored. We conducted a retrospective, observational clinical study to investigate the association between skin carotenoid (SC) levels and cognitive impairment, as screened by the Mini-Cog test, in glaucoma patients. The study included 406 participants and 812 eyes were examined (average age: 69.7 ± 11.4 years; 228 men, 178 women) with various types of glaucoma: primary open angle (57.6%), exfoliation (18.6%), and other types (23.8%). SC levels were estimated via pressure-mediated reflection spectroscopy. Mixed-effects regression models were utilized to examine the relationship between SC levels, visual field defects, and Mini-Cog results. Of the participants, 28 (6.9%) tested positive on the Mini-Cog, suggesting cognitive impairment. The average SC level in the Mini-Cog positive group was significantly lower than in the negative group (269.5 ± 86.4 A.U. vs. 329.2 ± 120.4 A.U., respectively; p = 0.01). Additionally, the visual field mean deviation (MD) in the Mini-Cog positive group was notably worse than that in the negative group (-19.64 ± 9.07 dB vs. -12.46 ± 9.28 dB, respectively; p < 0.0001). The mixed-effects regression analysis revealed a significant association between Mini-Cog positivity and lower SC levels (p = 0.0006), although SC levels did not significantly correlate with MD (p = 0.3). Our findings suggest that cognitive impairment in glaucoma patients is associated with lower SC levels, underscoring the potential benefits of maintaining carotenoid levels to slow cognitive function decline. The protective role of carotenoids in glaucoma merits further investigation.
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Affiliation(s)
- Yuji Takayanagi
- Department of Ophthalmology, Faculty of Medicine, Shimane University, Izumo 693-8501, Shimane, Japan; (Y.T.); (Y.K.)
- Department of Ophthalmology, Seirei Hamamatsu General Hospital, Hamamatsu 430-8558, Shizuoka, Japan;
| | - Yoichi Kadoh
- Department of Ophthalmology, Faculty of Medicine, Shimane University, Izumo 693-8501, Shimane, Japan; (Y.T.); (Y.K.)
| | - Junichi Sasaki
- Department of Ophthalmology, Faculty of Medicine, Shimane University, Izumo 693-8501, Shimane, Japan; (Y.T.); (Y.K.)
| | - Akira Obana
- Department of Ophthalmology, Seirei Hamamatsu General Hospital, Hamamatsu 430-8558, Shizuoka, Japan;
| | - Masaki Tanito
- Department of Ophthalmology, Faculty of Medicine, Shimane University, Izumo 693-8501, Shimane, Japan; (Y.T.); (Y.K.)
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Liu Y, Lawler T, Liu Z, Thuruthumaly C, Vajaranant T, Wallace R, Tinker L, Nalbandyan M, Mares J. Low Macular Pigment Optical Density Is Associated with Manifest Primary Open-Angle Glaucoma in Older Women. Curr Dev Nutr 2024; 8:103789. [PMID: 38974349 PMCID: PMC11225677 DOI: 10.1016/j.cdnut.2024.103789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2024] [Revised: 05/14/2024] [Accepted: 05/22/2024] [Indexed: 07/09/2024] Open
Abstract
Background Lower density of carotenoids lutein and zeaxanthin (L/Z) in the macula (i.e., macular pigment) has been linked to greater risk for age-related eye disease. Objectives We evaluated whether macular pigment optical density (MPOD) was associated with manifest primary open-angle glaucoma (POAG) among older women in the Carotenoids in Age-Related Eye Disease Study 2 (CAREDS2). Methods MPOD was measured with customized heterochromatic flicker photometry in women who attended CAREDS2 (2016-2019) and CAREDS1 (2001-2004) study visits. Manifest POAG at CAREDS2 was assessed using visual fields, disc photos, optical coherence tomography, and medical records. Age-adjusted linear and logistic regression models were used to investigate the cross-sectional association between POAG and MPOD at CAREDS2, and MPOD measured 15 years earlier at CAREDS1. Results Among 426 CAREDS2 participants (mean age: 80 y; range: 69-98 y), 26 eyes with manifest POAG from 26 participants were identified. Glaucomatous eyes had 25% lower MPOD compared to nonglaucomatous eyes [mean (SE): 0.40 (0.05) compared with 0.53 (0.01)] optical density units (ODU), respectively (P = 0.01). Compared with MPOD quartile 1, odds for POAG were lower for women in quartiles 2-4 (P-trend = 0.01). After excluding eyes with age-related macular degeneration, associations were similar but not statistically significant (P-trend = 0.16). Results were similar for MPOD measured at CAREDS1. Conclusions Our results add to growing evidence that low MPOD may be a novel glaucoma risk factor and support further studies to assess the utility of dietary interventions for glaucoma prevention.
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Affiliation(s)
- Yao Liu
- Department of Ophthalmology and Visual Sciences, University of Wisconsin-Madison, Madison, WI, United States
| | - Thomas Lawler
- Department of Nutritional Sciences, University of Wisconsin-Madison, Madison, WI, United States
| | - Zhe Liu
- Department of Ophthalmology and Visual Sciences, University of Wisconsin-Madison, Madison, WI, United States
| | | | - Thasarat Vajaranant
- Department of Ophthalmology and Visual Sciences, University of Illinois-Chicago, Chicago, IL, United States
| | - Robert Wallace
- Department of Epidemiology, University of Iowa, Iowa City, IA, United States
| | - Lesley Tinker
- Department of Cancer Prevention, Fred Hutchinson Cancer Research Center, Seattle, WA, United States
| | - Marine Nalbandyan
- Department of Ophthalmology and Visual Sciences, University of Wisconsin-Madison, Madison, WI, United States
| | - Julie Mares
- Department of Ophthalmology and Visual Sciences, University of Wisconsin-Madison, Madison, WI, United States
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Hu W, Seah V, Huang V, Kim JE. Effect of Antioxidant Supplementation on Macular Pigment Optical Density and Visual Functions: A Systematic Review and Network Meta-Analysis of Randomized Controlled Trials. Adv Nutr 2024; 15:100216. [PMID: 38582248 PMCID: PMC11052915 DOI: 10.1016/j.advnut.2024.100216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 03/14/2024] [Accepted: 03/29/2024] [Indexed: 04/08/2024] Open
Abstract
Antioxidants are bioactive molecules that function to scavenge free radicals and balance oxidative stress. Although all antioxidants can act as reactive oxygen species scavengers, their efficacy on eye health may vary. Moreover, the comparative effectiveness and potential additive effect between groups of antioxidants, hitherto, have not been systematically studied. A systematic review and network meta-analysis were conducted to investigate the comparative or additive effect of dietary antioxidant supplements on eye health. Four databases (PubMed, Embase, CINAHL, and Cochrane) were searched, and relevant randomized controlled trials were identified. Out of 60 articles selected for systematic review, 38 were included in the network meta-analysis, categorized into 8 distinct antioxidant-supplemented groups and placebo. All groups significantly increased macular pigment optical density and contrast sensitivity at low spatial frequency, whereas only the antioxidant mixture + lutein (L) + fatty acid combination exhibited significant improvements in visual acuity (hazard ratio = -0.15; 95% confidence interval: -0.28, -0.02) and L + zeaxanthin combination for photostress recovery time (hazard ratio = -5.75; 95% confidence interval: -8.80, -1.70). Especially, the L + zeaxanthin + fatty acid combination was ranked best for macular pigment optical density (surface under the cumulative ranking: 99.3%) and second best for contrast sensitivity at low spatial frequency (67.7%). However, these findings should be interpreted with caution due to low quality of evidence, primarily influenced by indirectness and potential publication bias. Overall, antioxidant supplementation was estimated to improve eye health parameters, whereas different combinations of antioxidants may also have varying effects on improving visual health from multiple perspectives. This study was registered at PROSPERO as CRD42022369250.
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Affiliation(s)
- Weili Hu
- Department of Food Science and Technology, National University of Singapore, Singapore
| | - Vernice Seah
- Department of Food Science and Technology, National University of Singapore, Singapore
| | - Vanessa Huang
- Department of Food Science and Technology, National University of Singapore, Singapore
| | - Jung Eun Kim
- Department of Food Science and Technology, National University of Singapore, Singapore.
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Loskutova E, Butler JS, Setti A, O'Brien C, Loughman J. Ability to Process Multisensory Information Is Impaired in Open Angle Glaucoma. J Glaucoma 2024; 33:78-86. [PMID: 37974328 DOI: 10.1097/ijg.0000000000002331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Accepted: 10/09/2023] [Indexed: 11/19/2023]
Abstract
PRCIS Patients with glaucoma demonstrated deficiencies in their ability to process multisensory information when compared with controls, with those deficiencies being related to glaucoma severity. Impaired multisensory integration (MSI) may affect the quality of life in individuals with glaucoma and may contribute to the increased prevalence of falls and driving safety concerns. Therapeutic possibilities to influence cognition in glaucoma should be explored. PURPOSE Glaucoma is a neurodegenerative disease of the optic nerve that has also been linked to cognitive health decline. This study explored MSI as a function of glaucoma status and severity. METHODS MSI was assessed in 37 participants with open angle glaucoma relative to 18 age-matched healthy controls. The sound-induced flash illusion was used to assess MSI efficiency. Participants were presented with various combinations of simultaneous visual and/or auditory stimuli and were required to indicate the number of visual stimuli observed for each of the 96 total presentations. Central retinal sensitivity was assessed as an indicator of glaucoma severity (MAIA; CenterVue). RESULTS Participants with glaucoma performed with equivalent capacity to healthy controls on unisensory trials ( F1,53 =2.222, P =0.142). Both groups performed equivalently on congruent multisensory trials involving equal numbers of auditory and visual stimuli F1,53 =1.032, P =0.314). For incongruent presentations, that is, 2 beeps and 1 flash stimulus, individuals with glaucoma demonstrated a greater influence of the incongruent beeps when judging the number of flashes, indicating less efficient MSI relative to age-matched controls ( F1,53 =11.45, P <0.002). In addition, MSI performance was positively correlated with retinal sensitivity ( F3,49 =4.042, P <0.025), adjusted R ²=0.15). CONCLUSIONS Individuals with open angle glaucoma exhibited MSI deficiencies that relate to disease severity. The type of deficiencies observed were similar to those observed among older individuals with cognitive impairment and balance issues. Impaired MSI may, therefore, be relevant to the increased prevalence of falls observed among individuals with glaucoma, a concept that merits further investigation.
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Affiliation(s)
- Ekaterina Loskutova
- Centre for Eye Research Ireland, School of Physics, Clinical & Optometric Sciences, Technological University Dublin, Dublin, Ireland
| | - John S Butler
- Centre for Eye Research Ireland, School of Mathematical Sciences, Technological University Dublin, Dublin, Ireland
| | - Annalisa Setti
- School of Applied Psychology, University College Cork, Cork, Ireland
| | - Colm O'Brien
- Department of Ophthalmology, Mater Misericordiae University Hospital, Dublin, Ireland
| | - James Loughman
- Centre for Eye Research Ireland, School of Physics, Clinical & Optometric Sciences, Technological University Dublin, Dublin, Ireland
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Hu W, Shankar P, Yao Y, Su X, Kim JE. Effect of xanthophyll-rich food and supplement intake on visual outcomes in healthy adults and those with eye disease: a systematic review, meta-analysis, and meta-regression of randomized controlled trials. Nutr Rev 2023; 82:34-46. [PMID: 37094947 DOI: 10.1093/nutrit/nuad037] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2023] Open
Abstract
CONTEXT Xanthophyll intake is known to improve eye health; however, its benefits on visual outcomes have not been systematically studied, particularly in a population with eye diseases. OBJECTIVE A systematic review, meta-analysis, and meta-regression were conducted to investigate the effect of xanthophyll intake on visual outcomes, and further subgroup analysis was performed on the basis of eye disease status. DATA SOURCES The PubMed, Scopus, Embase, CINAHL, Cochrane, and Web of Science databases were searched, and relevant randomized controlled trials were identified. DATA EXTRACTION For systematic review, meta-analysis, and meta-regression, 43, 25, and 21 articles were selected, respectively. DATA ANALYSIS Xanthophyll intake enhanced macular pigment optical density (MPOD) for both heterochromatic flicker photometry (weighted mean difference [WMD], 0.05; 95% confidence interval [CI], 0.03-0.07) and autofluorescence imaging (WMD, 0.08; 95%CI, 0.05-0.11) measurements and decreased photostress recovery time (WMD, -2.35; 95%CI, -4.49 to -0.20). While enhancement in visual acuity logarithm of the minimum angle of resolution was observed in response to the xanthophyll-rich food and supplement intake only for patients with eye disease (WMD, -0.04; 95%CI, -0.07 to -0.01). Meta-regression showed a positive correlation between change in MPOD (heterochromatic flicker photometry) and the corresponding change in serum lutein levels (regression coefficient = 0.068; P = 0.00). CONCLUSION Intake of xanthophyll-rich food or supplements can improve eye health. Additional improvement in visual acuity was observed in patients with eye disease. A positive association between MPOD and serum lutein level, while absent with dietary xanthophyll intake, suggests the importance of bioavailability when examining the effect of xanthophyll on eye health. SYSTEMATIC REVIEW REGISTRATION PROSPERO registration no. CRD42021295337.
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Affiliation(s)
- Weili Hu
- are with the Department of Food Science and Technology, National University of Singapore, Singapore, Singapore
| | - Pavitra Shankar
- are with the Department of Food Science and Technology, National University of Singapore, Singapore, Singapore
| | - Yuanhang Yao
- are with the Department of Food Science and Technology, National University of Singapore, Singapore, Singapore
| | - Xinyi Su
- is with the Department of Ophthalmology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Jung Eun Kim
- are with the Department of Food Science and Technology, National University of Singapore, Singapore, Singapore
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Udensi J, Loughman J, Loskutova E, Byrne HJ. Raman Spectroscopy of Carotenoid Compounds for Clinical Applications-A Review. Molecules 2022; 27:9017. [PMID: 36558154 PMCID: PMC9784873 DOI: 10.3390/molecules27249017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 12/09/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022] Open
Abstract
Carotenoid compounds are ubiquitous in nature, providing the characteristic colouring of many algae, bacteria, fruits and vegetables. They are a critical component of the human diet and play a key role in human nutrition, health and disease. Therefore, the clinical importance of qualitative and quantitative carotene content analysis is increasingly recognised. In this review, the structural and optical properties of carotenoid compounds are reviewed, differentiating between those of carotenes and xanthophylls. The strong non-resonant and resonant Raman spectroscopic signatures of carotenoids are described, and advances in the use of Raman spectroscopy to identify carotenoids in biological environments are reviewed. Focus is drawn to applications in nutritional analysis, optometry and serology, based on in vitro and ex vivo measurements in skin, retina and blood, and progress towards establishing the technique in a clinical environment, as well as challenges and future perspectives, are explored.
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Affiliation(s)
- Joy Udensi
- FOCAS Research Institute, Technological University Dublin, City Campus, Camden Row, Dublin 8, D08 CKP1 Dublin, Ireland
- School of Physics and Clinical and Optometric Sciences, Technological University Dublin, City Campus, Grangegorman, Dublin 7, D07 EWV4 Dublin, Ireland
- Centre for Eye Research, Ireland, Technological University Dublin, City Campus, Grangegorman, Dublin 7, D07 EWV4 Dublin, Ireland
| | - James Loughman
- School of Physics and Clinical and Optometric Sciences, Technological University Dublin, City Campus, Grangegorman, Dublin 7, D07 EWV4 Dublin, Ireland
- Centre for Eye Research, Ireland, Technological University Dublin, City Campus, Grangegorman, Dublin 7, D07 EWV4 Dublin, Ireland
| | - Ekaterina Loskutova
- School of Physics and Clinical and Optometric Sciences, Technological University Dublin, City Campus, Grangegorman, Dublin 7, D07 EWV4 Dublin, Ireland
- Centre for Eye Research, Ireland, Technological University Dublin, City Campus, Grangegorman, Dublin 7, D07 EWV4 Dublin, Ireland
| | - Hugh J. Byrne
- FOCAS Research Institute, Technological University Dublin, City Campus, Camden Row, Dublin 8, D08 CKP1 Dublin, Ireland
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Combined drug triads for synergic neuroprotection in retinal degeneration. Biomed Pharmacother 2022; 149:112911. [DOI: 10.1016/j.biopha.2022.112911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 03/28/2022] [Accepted: 03/29/2022] [Indexed: 11/23/2022] Open
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Mechanism of glycometabolism regulation by bioactive compounds from the fruits of Lycium barbarum: A review. Food Res Int 2022; 159:111408. [DOI: 10.1016/j.foodres.2022.111408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 04/30/2022] [Accepted: 05/22/2022] [Indexed: 11/21/2022]
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13
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Richer S, Novil S, Gullett T, Dervishi A, Nassiri S, Duong C, Davis R, Davey PG. Night Vision and Carotenoids (NVC): A Randomized Placebo Controlled Clinical Trial on Effects of Carotenoid Supplementation on Night Vision in Older Adults. Nutrients 2021; 13:3191. [PMID: 34579067 PMCID: PMC8471486 DOI: 10.3390/nu13093191] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 09/07/2021] [Accepted: 09/10/2021] [Indexed: 12/22/2022] Open
Abstract
Twilight and low luminance levels are visually challenging environments for the elderly, especially when driving at night. Carotenoid rich diets are known to increase macular pigment optical density (MPOD), which in turn leads to an improvement in visual function. It is not known whether augmenting MPOD can lead to a decrease in vision related night driving difficulties. Additionally, it is unknown if carotenoid supplementation provides additional measurable benefits to one's useful field of view (UFOV) along with a decreased composite crash risk score. The aim of the study was to evaluate changes in night vision function and UFOV in individuals that took carotenoid vitamin supplements for a six-month period compared to a placebo group. METHODS A prospective, randomized, double-blind, six-month trial of a 14 mg zeaxanthin/7 mg lutein-based supplement was carried out. Participants were randomized into active or placebo group (approx 2:1). RESULTS n = 33 participants (26 males/7 females) participated with 93% capsule intake compliance in the supplemented group (n = 24) and placebo group (n = 9). MPOD (mean/standard error SE) in the active group increased in the Right eye from 0.35 density units (du)/0.04 SE to 0.41 du/0.05 SE; p < 0.001 and in the Left eye from 0.35 du/0.05 SE to 0.37 du, p > 0.05). The supplemented group showed significant improvements in contrast sensitivity with glare in both eyes with improvements in LogMAR scores of 0.147 and 0.149, respectively (p = 0.02 and 0.01, respectively), monocularly tested glare recovery time improved 2.76 and 2.54 s, respectively, (p = 0.008 and p = 0.02), and we also noted a decreased preferred luminance required to complete visual tasks (p = 0.02 and 0.03). Improvements in UFOV scores of divided attention (p < 0.001) and improved composite crash risk score (p = 0.004) were seen in the supplemented group. The placebo group remained unchanged. CONCLUSIONS The NVC demonstrates that augmenting MPOD in individuals with difficulty in night vision showed measurable benefits in numerous visual functions that are important for night vision driving in this small sample RCT. Additionally, we observed an improvement in UFOV divided attention test scores and decreased composite risk scores.
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Affiliation(s)
- Stuart Richer
- Captain James A Lovell Fed Health Care Facility, North Chicago, IL 60064, USA;
- Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, IL 60064, USA; (T.G.); (A.D.); (S.N.); (C.D.)
| | - Steven Novil
- Captain James A Lovell Fed Health Care Facility, North Chicago, IL 60064, USA;
| | - Taylor Gullett
- Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, IL 60064, USA; (T.G.); (A.D.); (S.N.); (C.D.)
| | - Avni Dervishi
- Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, IL 60064, USA; (T.G.); (A.D.); (S.N.); (C.D.)
| | - Sherwin Nassiri
- Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, IL 60064, USA; (T.G.); (A.D.); (S.N.); (C.D.)
| | - Co Duong
- Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, IL 60064, USA; (T.G.); (A.D.); (S.N.); (C.D.)
| | - Robert Davis
- Davis Eye Care Associates, Oak Lawn, IL 60453, USA;
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