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Kritz-Silverstein D, Bettencourt R. Egg Consumption and 4-Year Change in Cognitive Function in Older Men and Women: The Rancho Bernardo Study. Nutrients 2024; 16:2765. [PMID: 39203901 PMCID: PMC11356842 DOI: 10.3390/nu16162765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2024] [Revised: 08/12/2024] [Accepted: 08/17/2024] [Indexed: 09/03/2024] Open
Abstract
The effect of dietary cholesterol on cognitive function is debatable. While eggs contain high levels of dietary cholesterol, they provide nutrients beneficial for cognitive function. This study examined the effects of egg consumption on change in cognitive function among 890 ambulatory adults (N = 357 men; N = 533 women) aged ≥55 years from the Rancho Bernardo Study who attended clinic visits in 1988-1991 and 1992-1996. Egg intake was obtained in 1988-1991 with a food frequency questionnaire. The Mini-Mental Status Exam (MMSE), Trails B, and category fluency were administered at both visits to assess cognitive performance. Sex-specific multiple regression analyses tested associations of egg intake with changes in cognitive function after adjustment for confounders. The mean time between visits was 4.1 ± 0.5 years; average ages were 70.1 ± 8.4 in men and 71.5 ± 8.8 in women (p = 0.0163). More men consumed eggs at higher levels than women; while 14% of men and 16.5% of women reported never eating eggs, 7.0% of men and 3.8% of women reported intakes ≥5/week (p = 0.0013). In women, after adjustment for covariates, egg consumption was associated with less decline in category fluency (beta = -0.10, p = 0.0241). Other associations were nonsignificant in women, and no associations were found in men. Results suggest that egg consumption has a small beneficial effect on semantic memory in women. The lack of decline observed in both sexes suggests that egg consumption does not have detrimental effects and may even have a role in the maintenance of cognitive function.
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Affiliation(s)
- Donna Kritz-Silverstein
- Herbert Wertheim School of Public Health and Longevity Science, University of California San Diego, La Jolla, CA 92093-0725, USA
- Department of Family Medicine, School of Medicine, University of California San Diego, La Jolla, CA 92093-0725, USA
| | - Ricki Bettencourt
- Division of Gastroenterology and Hepatology, School of Medicine, University of California San Diego, La Jolla, CA 92093-0725, USA;
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2
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Flieger J, Forma A, Flieger W, Flieger M, Gawlik PJ, Dzierżyński E, Maciejewski R, Teresiński G, Baj J. Carotenoid Supplementation for Alleviating the Symptoms of Alzheimer's Disease. Int J Mol Sci 2024; 25:8982. [PMID: 39201668 PMCID: PMC11354426 DOI: 10.3390/ijms25168982] [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: 07/26/2024] [Revised: 08/12/2024] [Accepted: 08/16/2024] [Indexed: 09/03/2024] Open
Abstract
Alzheimer's disease (AD) is characterized by, among other things, dementia and a decline in cognitive performance. In AD, dementia has neurodegenerative features and starts with mild cognitive impairment (MCI). Research indicates that apoptosis and neuronal loss occur in AD, in which oxidative stress plays an important role. Therefore, reducing oxidative stress with antioxidants is a natural strategy to prevent and slow down the progression of AD. Carotenoids are natural pigments commonly found in fruits and vegetables. They include lipophilic carotenes, such as lycopene, α- and β-carotenes, and more polar xanthophylls, for example, lutein, zeaxanthin, canthaxanthin, and β-cryptoxanthin. Carotenoids can cross the blood-brain barrier (BBB) and scavenge free radicals, especially singlet oxygen, which helps prevent the peroxidation of lipids abundant in the brain. As a result, carotenoids have neuroprotective potential. Numerous in vivo and in vitro studies, as well as randomized controlled trials, have mostly confirmed that carotenoids can help prevent neurodegeneration and alleviate cognitive impairment in AD. While carotenoids have not been officially approved as an AD therapy, they are indicated in the diet recommended for AD, including the consumption of products rich in carotenoids. This review summarizes the latest research findings supporting the potential use of carotenoids in preventing and alleviating AD symptoms. A literature review suggests that a diet rich in carotenoids should be promoted to avoid cognitive decline in AD. One of the goals of the food industry should be to encourage the enrichment of food products with functional substances, such as carotenoids, which may reduce the risk of neurodegenerative diseases.
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Affiliation(s)
- Jolanta Flieger
- Department of Analytical Chemistry, Medical University of Lublin, Chodźki 4a, 20-093 Lublin, Poland
| | - Alicja Forma
- Department of Forensic Medicine, Medical University of Lublin, ul. Jaczewskiego 8b, 20-090 Lublin, Poland; (A.F.); (M.F.); (G.T.)
| | - Wojciech Flieger
- Department of Plastic Surgery, St. John’s Cancer Center, ul. Jaczewskiego 7, 20-090 Lublin, Poland; (W.F.)
| | - Michał Flieger
- Department of Forensic Medicine, Medical University of Lublin, ul. Jaczewskiego 8b, 20-090 Lublin, Poland; (A.F.); (M.F.); (G.T.)
| | - Piotr J. Gawlik
- Department of Plastic Surgery, St. John’s Cancer Center, ul. Jaczewskiego 7, 20-090 Lublin, Poland; (W.F.)
| | - Eliasz Dzierżyński
- Department of Plastic Surgery, St. John’s Cancer Center, ul. Jaczewskiego 7, 20-090 Lublin, Poland; (W.F.)
| | - Ryszard Maciejewski
- Institute of Health Sciences, John Paul II Catholic University of Lublin, Konstantynów 1 H, 20-708 Lublin, Poland;
| | - Grzegorz Teresiński
- Department of Forensic Medicine, Medical University of Lublin, ul. Jaczewskiego 8b, 20-090 Lublin, Poland; (A.F.); (M.F.); (G.T.)
| | - Jacek Baj
- Department of Correct, Clinical and Imaging Anatomy, Medical University of Lublin, ul. Jaczewskiego 4, 20-090 Lublin, Poland;
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Chan JP, Tanprasertsuk J, Johnson EJ, Dey P, Bruno RS, Johnson MA, Poon LW, Davey A, Woodard JL, Kuchan MJ. Associations between Brain Alpha-Tocopherol Stereoisomer Profile and Hallmarks of Brain Aging in Centenarians. Antioxidants (Basel) 2024; 13:997. [PMID: 39199242 PMCID: PMC11351880 DOI: 10.3390/antiox13080997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2024] [Revised: 08/05/2024] [Accepted: 08/12/2024] [Indexed: 09/01/2024] Open
Abstract
Brain alpha-tocopherol (αT) concentration was previously reported to be inversely associated with neurofibrillary tangle (NFT) counts in specific brain structures from centenarians. However, the contribution of natural or synthetic αT stereoisomers to this relationship is unknown. In this study, αT stereoisomers were quantified in the temporal cortex (TC) of 47 centenarians in the Georgia Centenarian Study (age: 102.2 ± 2.5 years, BMI: 22.1 ± 3.9 kg/m2) and then correlated with amyloid plaques (diffuse and neuritic plaques; DPs, NPs) and NFTs in seven brain regions. The natural stereoisomer, RRR-αT, was the primary stereoisomer in all subjects, accounting for >50% of total αT in all but five subjects. %RRR was inversely correlated with DPs in the frontal cortex (FC) (ρ = -0.35, p = 0.032) and TC (ρ = -0.34, p = 0.038). %RSS (a synthetic αT stereoisomer) was positively correlated with DPs in the TC (ρ = 0.39, p = 0.017) and with NFTs in the FC (ρ = 0.37, p = 0.024), TC (ρ = 0.42, p = 0.009), and amygdala (ρ = 0.43, p = 0.008) after controlling for covariates. Neither RRR- nor RSS-αT were associated with premortem global cognition. Even with the narrow and normal range of BMIs, BMI was correlated with %RRR-αT (ρ = 0.34, p = 0.021) and %RSS-αT (ρ = -0.45, p = 0.002). These results providing the first characterization of TC αT stereoisomer profiles in centenarians suggest that DP and NFT counts, but not premortem global cognition, are influenced by the brain accumulation of specific αT stereoisomers. Further study is needed to confirm these findings and to determine the potential role of BMI in mediating this relationship.
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Affiliation(s)
| | - Jirayu Tanprasertsuk
- Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA 02111, USA;
| | - Elizabeth J. Johnson
- Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA 02111, USA;
| | - Priyankar Dey
- College of Education and Human Ecology, The Ohio State University, Columbus, OH 43210, USA; (P.D.); (R.S.B.)
- Department of Biotechnology, Thapar Institute of Engineering & Technology, Patiala 147004, Punjab, India
| | - Richard S. Bruno
- College of Education and Human Ecology, The Ohio State University, Columbus, OH 43210, USA; (P.D.); (R.S.B.)
| | - Mary Ann Johnson
- Department of Nutrition and Health Sciences, University of Nebraska-Lincoln, Lincoln, NE 68588, USA;
| | - Leonard W. Poon
- Institute of Gerontology, University of Georgia-Athens, Athens, GA 30602, USA;
| | - Adam Davey
- Department of Health Behavior and Nutrition Sciences, University of Delaware, Newark, DE 19716, USA;
| | - John L. Woodard
- Department of Psychology, College of Liberal Arts and Sciences, Wayne State University, Detroit, MI 48202, USA;
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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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5
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Rosok LM, Cannavale CN, Keye SA, Holscher HD, Renzi-Hammond L, Khan NA. Skin and macular carotenoids and relations to academic achievement among school-aged children. Nutr Neurosci 2024:1-13. [PMID: 38989695 DOI: 10.1080/1028415x.2024.2370175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/12/2024]
Abstract
ABSTRACTObjectives: Carotenoids are plant pigments that accumulate in human tissue (e.g. macula and skin) and can serve as biomarkers for diet quality; however, knowledge on skin and macular carotenoids in relation to cognition in children is limited. This study aimed to address this gap by assessing links between skin and macular carotenoids and academic achievement in school-aged children.Methods: Children 7-12 years old (n = 81) participated in a crosssectional study. Skin and macular carotenoids were measured with reflection spectroscopy and heterochromatic flicker photometry, respectively. Academic achievement was measured using Woodcock-Johnson IV (WJ-IV). Body Mass Index was calculated using height and weight measurements, demographic information was collected using a family demographics and pediatric health history questionnaire, and carotenoid intake was assessed using 7-day diet records.Results: Skin carotenoids were not related to macular pigment (r = 0.08, p = 0.22). Adjusting for age, sex, BMI percentile, household income, and total carotenoid consumption (mg/1000kcal), skin carotenoids were predictive of math (β = 0.27, p = 0.02), broad math (β = 0.36, p < 0.01) and math calculation (β = 0.38, p < 0.01). Skin carotenoids displayed trending relationships with broad reading (β = 0.23, p = 0.05) and reading fluency (β = 0.22, p = 0.07). There were no significant associations between macular pigment and academic achievement (all β's ≤ 0.07, all p's ≥ 0.56).Discussion: Skin carotenoids were positively associated with academic abilities in children, while macular carotenoids did not display this relationship. Future interventions examining prospective effects of changes in carotenoids in different tissues on childhood academic achievement are warranted.
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Affiliation(s)
- Laura M Rosok
- Neuroscience Program, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Corinne N Cannavale
- Department of Kinesiology and Community Health, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Shelby A Keye
- Department of Kinesiology and Community Health, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Hannah D Holscher
- Department of Kinesiology and Community Health, University of Illinois Urbana-Champaign, Urbana, IL, USA
- Division of Nutritional Sciences, University of Illinois Urbana-Champaign, Champaign, IL, USA
- Department of Food Science and Human Nutrition, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | | | - Naiman A Khan
- Neuroscience Program, University of Illinois Urbana-Champaign, Urbana, IL, USA
- Department of Kinesiology and Community Health, University of Illinois Urbana-Champaign, Urbana, IL, USA
- Division of Nutritional Sciences, University of Illinois Urbana-Champaign, Champaign, IL, USA
- Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, Urbana, IL, USA
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Iyer S, Bhat I, Bangera Sheshappa M. Lutein and the Underlying Neuroprotective Promise against Neurodegenerative Diseases. Mol Nutr Food Res 2024; 68:e2300409. [PMID: 38487969 DOI: 10.1002/mnfr.202300409] [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: 06/15/2023] [Revised: 01/25/2024] [Indexed: 07/21/2024]
Abstract
Alzheimer's disease (AD) and Parkinson's diseases (PD) are the two most common progressive neurodegenerative diseases with limited knowledge on their cause and, presently, have no cure. There is an existence of multiple treatment methods that target only the symptoms temporarily and do not stop the progression or prevent the onset of disease. Neurodegeneration is primarily attributed to the natural process of aging and the deleterious effects of heightened oxidative stress within the brain, whether via direct or indirect mechanisms. Emerging evidence suggests that certain nutritional aspects play a crucial role in the prevention and management of neurodegenerative diseases. Lutein, a dietary carotenoid, has been studied for its antioxidant properties for more than a decade with several applications against age-related macular degeneration. It is high antioxidant potential and selective accumulation in the brain makes it a versatile compound for combatting various neurodegenerative diseases. In this review, the studies exhibiting neuroprotective properties of lutein against neurodegenerative conditions, more specifically AD and PD in various model systems as well as clinical observations have been reviewed. Accordingly, the concerns associated with lutein absorption and potential strategies to improve its bioavailability have been discussed.
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Affiliation(s)
- Saisree Iyer
- Department of Food Safety and Nutrition, Nitte (Deemed to be University), Nitte University Centre for Science Education and Research (NUCSER), Paneer Campus, Deralakatte, Mangaluru, Karnataka, 575018, India
| | - Ishani Bhat
- Department of Food Safety and Nutrition, Nitte (Deemed to be University), Nitte University Centre for Science Education and Research (NUCSER), Paneer Campus, Deralakatte, Mangaluru, Karnataka, 575018, India
| | - Mamatha Bangera Sheshappa
- Department of Food Safety and Nutrition, Nitte (Deemed to be University), Nitte University Centre for Science Education and Research (NUCSER), Paneer Campus, Deralakatte, Mangaluru, Karnataka, 575018, India
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Tang L, Liu M, Mu J, Tian J. Association between circulating antioxidants and sleep disorders: comprehensive results from NHANES 2017-2018. Food Funct 2024; 15:6657-6672. [PMID: 38814101 DOI: 10.1039/d4fo00413b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2024]
Abstract
Background: Oxidative stress plays an important role in the occurrence and pathological process of numerous human diseases. A bidirectional relationship was found between sleep disorders and oxidative stress. However, the association between circulating antioxidant levels and the risk of sleep disorders at the population-scale has yet to be determined. Methods: We used the dataset from the National Health and Nutrition Examination Survey (NHANES) 2017-2018 data release cycle and included 3062 adult participants aged 25-75 years. The circulating antioxidants levels in serum were measured, and the sleep status was assessed by self-reported sleep disorder questionnaire tests. We investigated the association and exposure-response relationship between the 12 main circulating antioxidants and sleep disorders using a generalized additive model (GAM), multiple linear, binary logistic, and restricted cubic spline (RCS) regression models. Multiple sensitivity analyses were conducted to validate the results of our study. Results: Significantly lower serum concentrations of ten antioxidants were observed in the group which had trouble sleeping symptoms compared to the control group. After adjusting for all the covariates, the binary logistic regression models indicated that six of the circulating antioxidants including alpha-carotene, alpha-cryptoxanthin, trans-beta-carotene, beta-cryptoxanthin, lutein and zeaxanthin, and vitamin C, showed a significant association with the risk of overall trouble sleeping symptoms, with odds ratios corresponding to 0.88 (95% CI: 0.80-0.96), 0.74 (95% CI: 0.62-0.87), 0.87 (95% CI: 0.79-0.97), 0.85 (95% CI: 0.75-0.95), 0.72 (95% CI: 0.61-0.84), and 0.83 (95% CI: 0.74-0.93), respectively. The GAM and multiple linear regression revealed similar associations whereas the RCS regression models further confirmed their significant negative exposure-response relationship. Conclusions: The circulating carotenoids and vitamin C levels were negatively correlated with the risk of sleep disorders. Higher circulating antioxidant levels were significantly associated with a lower risk of sleep disorders. The potential health risk of low circulating antioxidants levels was higher in the female population than in the male population.
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Affiliation(s)
- Liwei Tang
- Shenzhen Key Laboratory of Marine Biotechnology and Ecology, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, Guangdong, 518055 China.
| | - Min Liu
- Shenzhen Key Laboratory of Marine Biotechnology and Ecology, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, Guangdong, 518055 China.
- Brain Cognition and Brain Disease Institute, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055 China
| | - Jingjing Mu
- Affiliated Psychological Hospital of Anhui Medical University, Anhui Mental Health Center, Hefei Fourth People's Hospital, Hefei 230022, China
| | - Jing Tian
- Shenzhen Key Laboratory of Marine Biotechnology and Ecology, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, Guangdong, 518055 China.
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Khor KL, Kumarasuriar V, Tan KW, Ooi PB, Chia YC. Effects of fruit and vegetable intake on memory and attention: a systematic review of randomized controlled trials. Syst Rev 2024; 13:151. [PMID: 38849879 PMCID: PMC11157787 DOI: 10.1186/s13643-024-02547-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Accepted: 04/26/2024] [Indexed: 06/09/2024] Open
Abstract
BACKGROUND Memory and attention are important for daily functioning, and their function deteriorates due to aging. However, fruit and vegetable consumption are one of the protective factors against deterioration in memory and attention. This systematic review of randomized controlled trials (RCTs) aims to identify the effects of fruit and vegetable consumption on memory and attention. METHODS We conducted a systematic search in EBSCOhost, ProQuest, PubMed, Embase, and Web of Science from inception up to 06/09/2022. The inclusion criteria were peer-reviewed articles, fruit and vegetable intake measured using randomized controlled trials, and the outcome measures that showed the results of memory and attention scores. Two researchers independently extracted articles that met the selection criteria and evaluated the quality of each study. RESULTS There were 70 articles identified from the databases, of which 13 articles met the inclusion criteria and were included in this systematic review. There were 493 participants in total. The results show that consumption of fruit and vegetable intake improved memory and attention in longitudinal studies (10 to 12 weeks). Children showed improvement in immediate recall after supplementation with blueberries. Older adults required a higher dose of fruit and vegetable intake consumption to achieve significant improvement compared with children and younger adults. Furthermore, the effect of fruits and vegetables on memory showed better immediate memory recall than delayed recall. CONCLUSION This systematic review showed that there is an improvement in memory and attention with fruit and vegetable intake consumption. Hence, awareness of fruit and vegetable intake consumption is important to maintain cognitive health.
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Affiliation(s)
- Khai Ling Khor
- Department of Medical Sciences, School of Medical and Life Sciences, Sunway University, Selangor, Malaysia
- School of Psychology, DISTED College, Penang, Malaysia
| | - Vashnarekha Kumarasuriar
- Department of Medical Sciences, School of Medical and Life Sciences, Sunway University, Selangor, Malaysia
- School of Psychology and Clinical Language Sciences, University of Reading Malaysia, Iskandar Puteri, Malaysia
| | - Kok Wei Tan
- School of Psychology and Clinical Language Sciences, University of Reading Malaysia, Iskandar Puteri, Malaysia
| | - Pei Boon Ooi
- Department of Medical Sciences, School of Medical and Life Sciences, Sunway University, Selangor, Malaysia
| | - Yook-Chin Chia
- Department of Medical Sciences, School of Medical and Life Sciences, Sunway University, Selangor, Malaysia.
- Department of Primary Care Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.
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Holthaus TA, Keye SA, Verma S, Cannavale CN, Burd NA, Holscher HD, Khan NA. Dietary patterns and carotenoid intake: Comparisons of MIND, Mediterranean, DASH, and Healthy Eating Index. Nutr Res 2024; 126:58-66. [PMID: 38615632 DOI: 10.1016/j.nutres.2024.03.008] [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: 01/08/2024] [Revised: 03/18/2024] [Accepted: 03/18/2024] [Indexed: 04/16/2024]
Abstract
The Mediterranean-Dietary Approaches to Stop Hypertension (DASH) Intervention for Neurodegenerative Delay (MIND) dietary pattern is associated with reduced cognitive decline and dementia risk. However, the nutrient features that distinguish the MIND from other patterns are unknown. We investigated the relationship between accordance to the MIND pattern and carotenoid intake (phytonutrients hypothesized to confer neuroprotection) relative to the Mediterranean, DASH, and Healthy Eating Index (HEI-2020). We hypothesized that MIND diet accordance would be a stronger predictor of carotenoid intake relative to other diet indices. A total of 396 adults (aged 19-82 years) completed the Dietary History Questionnaire to assess carotenoid intake and adherence to each diet index. Stepwise regressions with adjustment for covariates followed by the Meng's Z-test were used to compare correlation strength between each diet pattern and carotenoid. All diet patterns were positively associated with lutein and zeaxanthin, β-carotene, α-carotene, and β-cryptoxanthin (all βs ≥0.38, Ps <.01). Effect size comparisons revealed that MIND accordance predicted a greater proportion of variance in lutein and zeaxanthin (all Zs ≥ 3.3, Ps < .001) and β-carotene (all Zs ≥ 2.6, Ps < .01) relative to the Mediterranean, DASH, and HEI-2020. MIND accordance explained a greater proportion of variance in α-carotene (Z = 3.8, P < .001) and β-cryptoxanthin (Z = 3.6, P < .001) relative to the HEI-2020. MIND diet accordance was disproportionately related to carotenoid intake, indicating the MIND index places greater emphasis on carotenoid-rich foods, particularly those containing lutein, zeaxanthin, and β-carotene, relative to other diet indices. Future research is needed to define the role of these carotenoids in nutritional interventions for cognitive health.
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Affiliation(s)
- Tori A Holthaus
- Division of Nutritional Sciences, University of Illinois, Louise Freer Hall, Urbana, IL 61801, USA
| | - Shelby A Keye
- Kinesiology and Community Health, University of Illinois, Louise Freer Hall, Urbana, IL 61801, USA
| | - Shreya Verma
- Kinesiology and Community Health, University of Illinois, Louise Freer Hall, Urbana, IL 61801, USA
| | - Corinne N Cannavale
- Kinesiology and Community Health, University of Illinois, Louise Freer Hall, Urbana, IL 61801, USA
| | - Nicholas A Burd
- Division of Nutritional Sciences; Kinesiology and Community Health, University of Illinois, Louise Freer Hall, Urbana, IL 61801, USA
| | - Hannah D Holscher
- Division of Nutritional Sciences; Department of Food Science and Human Nutrition, University of Illinois, Urbana, IL 61801, USA
| | - Naiman A Khan
- Neuroscience Program, Beckman Institute of Advanced Science and Technology, Division of Nutritional Sciences, Kinesiology and Community Health, University of Illinois, Urbana, IL, USA.
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Asadi nejad H, Yousefi Nejad A, Akbari S, Naseh M, Shid Moosavi SM, Haghani M. The low and high doses administration of lutein improves memory and synaptic plasticity impairment through different mechanisms in a rat model of vascular dementia. PLoS One 2024; 19:e0302850. [PMID: 38748711 PMCID: PMC11095768 DOI: 10.1371/journal.pone.0302850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Accepted: 04/12/2024] [Indexed: 05/19/2024] Open
Abstract
BACKGROUND AND AIM Vascular dementia (VD) is a common type of dementia. This study aimed to evaluate the effects of low and high doses of lutein administration in bilateral-carotid vessel occlusion (2VO) rats. EXPERIMENTAL PROCEDURE The rats were divided into the following groups: the control, sham-, vehicle (2VO+V) groups, and two groups after 2VO were treated with lutein 0.5 (2VO+LUT-o.5) and 5mg/kg (2VO+LUT-5). The passive-avoidance and Morris water maze were performed to examine fear and spatial memory. The field-potential recording was used to investigate the properties of basal synaptic transmission (BST), paired-pulse ratio (PPR), as an index for measurement of neurotransmitter release, and long-term potentiation (LTP). The hippocampus was removed to evaluate hippocampal cells, volume, and MDA level. RESULT Treatment with low and high doses improves spatial memory and LTP impairment in VD rats, but only the high dose restores the fear memory, hippocampal cell loss, and volume and MDA level. Interestingly, low-dose, but not high-dose, increased PPR. However, BST recovered only in the high-dose treated group. CONCLUSIONS Treatment with a low dose might affect neurotransmitter release probability, but a high dose affects postsynaptic processes. It seems likely that low and high doses improve memory and LTP through different mechanisms.
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Affiliation(s)
- Hamideh Asadi nejad
- Department of Physiology, The Medical School, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Amirhossein Yousefi Nejad
- Faculty of Veterinary Medicine, Department of Veterinary Medicine Islamic Azad University of Kazeroon, Shiraz, Iran
| | - Somayeh Akbari
- Histomorphometry and Stereology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Maryam Naseh
- Histomorphometry and Stereology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | | | - Masoud Haghani
- Department of Physiology, The Medical School, Shiraz University of Medical Sciences, Shiraz, Iran
- Histomorphometry and Stereology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
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11
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Jomova K, Alomar SY, Alwasel SH, Nepovimova E, Kuca K, Valko M. Several lines of antioxidant defense against oxidative stress: antioxidant enzymes, nanomaterials with multiple enzyme-mimicking activities, and low-molecular-weight antioxidants. Arch Toxicol 2024; 98:1323-1367. [PMID: 38483584 PMCID: PMC11303474 DOI: 10.1007/s00204-024-03696-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2024] [Accepted: 01/31/2024] [Indexed: 03/27/2024]
Abstract
Reactive oxygen species (ROS) and reactive nitrogen species (RNS) are well recognized for playing a dual role, since they can be either deleterious or beneficial to biological systems. An imbalance between ROS production and elimination is termed oxidative stress, a critical factor and common denominator of many chronic diseases such as cancer, cardiovascular diseases, metabolic diseases, neurological disorders (Alzheimer's and Parkinson's diseases), and other disorders. To counteract the harmful effects of ROS, organisms have evolved a complex, three-line antioxidant defense system. The first-line defense mechanism is the most efficient and involves antioxidant enzymes such as superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx). This line of defense plays an irreplaceable role in the dismutation of superoxide radicals (O2•-) and hydrogen peroxide (H2O2). The removal of superoxide radicals by SOD prevents the formation of the much more damaging peroxynitrite ONOO- (O2•- + NO• → ONOO-) and maintains the physiologically relevant level of nitric oxide (NO•), an important molecule in neurotransmission, inflammation, and vasodilation. The second-line antioxidant defense pathway involves exogenous diet-derived small-molecule antioxidants. The third-line antioxidant defense is ensured by the repair or removal of oxidized proteins and other biomolecules by a variety of enzyme systems. This review briefly discusses the endogenous (mitochondria, NADPH, xanthine oxidase (XO), Fenton reaction) and exogenous (e.g., smoking, radiation, drugs, pollution) sources of ROS (superoxide radical, hydrogen peroxide, hydroxyl radical, peroxyl radical, hypochlorous acid, peroxynitrite). Attention has been given to the first-line antioxidant defense system provided by SOD, CAT, and GPx. The chemical and molecular mechanisms of antioxidant enzymes, enzyme-related diseases (cancer, cardiovascular, lung, metabolic, and neurological diseases), and the role of enzymes (e.g., GPx4) in cellular processes such as ferroptosis are discussed. Potential therapeutic applications of enzyme mimics and recent progress in metal-based (copper, iron, cobalt, molybdenum, cerium) and nonmetal (carbon)-based nanomaterials with enzyme-like activities (nanozymes) are also discussed. Moreover, attention has been given to the mechanisms of action of low-molecular-weight antioxidants (vitamin C (ascorbate), vitamin E (alpha-tocopherol), carotenoids (e.g., β-carotene, lycopene, lutein), flavonoids (e.g., quercetin, anthocyanins, epicatechin), and glutathione (GSH)), the activation of transcription factors such as Nrf2, and the protection against chronic diseases. Given that there is a discrepancy between preclinical and clinical studies, approaches that may result in greater pharmacological and clinical success of low-molecular-weight antioxidant therapies are also subject to discussion.
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Affiliation(s)
- Klaudia Jomova
- Department of Chemistry, Faculty of Natural Sciences, Constantine The Philosopher University in Nitra, Nitra, 949 74, Slovakia
| | - Suliman Y Alomar
- Doping Research Chair, Zoology Department, College of Science, King Saud University, 11451, Riyadh, Saudi Arabia
| | - Saleh H Alwasel
- Zoology Department, College of Science, King Saud University, 11451, Riyadh, Saudi Arabia
| | - Eugenie Nepovimova
- Department of Chemistry, Faculty of Sciences, University of Hradec Kralove, 50005, Hradec Kralove, Czech Republic
| | - Kamil Kuca
- Department of Chemistry, Faculty of Sciences, University of Hradec Kralove, 50005, Hradec Kralove, Czech Republic
- Biomedical Research Center, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic
| | - Marian Valko
- Faculty of Chemical and Food Technology, Slovak University of Technology, 812 37, Bratislava, Slovakia.
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12
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Kadam I, Nebie C, Dalloul M, Hittelman J, Fordjour L, Hoepner L, Futterman ID, Minkoff H, Jiang X. Maternal Lutein Intake during Pregnancies with or without Gestational Diabetes Mellitus and Cognitive Development of Children at 2 Years of Age: A Prospective Observational Study. Nutrients 2024; 16:328. [PMID: 38276566 PMCID: PMC10819807 DOI: 10.3390/nu16020328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 01/14/2024] [Accepted: 01/19/2024] [Indexed: 01/27/2024] Open
Abstract
Lutein and its isomer zeaxanthin serve as antioxidants and preserve cognitive function during aging. However, whether lutein/zeaxanthin (L + Z) exposure early in life improves cognitive development of children is rarely explored. It is also unknown whether gestational diabetes mellitus (GDM), characterized by heightened oxidative stress, affects lutein metabolism. This prospective longitudinal cohort study examined the differences in L + Z intake and metabolism, as well as the association between maternal L + Z intake and children's cognitive development in GDM versus non-GDM pregnancies. Seventy-six pregnant women (n = 40 with GDM) were recruited between 25 and 33 weeks of gestation and dietary intakes were recorded. At delivery, cord blood was collected, and 2 years later, the Bayley III developmental test was conducted on a subset of children (n = 38). The results suggest that GDM reduced cord blood lutein levels at birth; L + Z intake during pregnancy was associated with better cognitive (β = 0.003, p = 0.001) and language (β = 0.002, p = 0.038) scoring of children at 2 years regardless of GDM status. In conclusion, maternal L + Z intake was positively associated with children's developmental scores, regardless of GDM. More studies are needed to confirm such associations.
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Affiliation(s)
- Isma’il Kadam
- PhD Program in Biochemistry, Graduate Center of the City University of New York, New York, NY 10016, USA;
- Department of Health and Nutrition Sciences, Brooklyn College of the City University of New York, Brooklyn, NY 11210, USA;
| | - Chauntelle Nebie
- Department of Health and Nutrition Sciences, Brooklyn College of the City University of New York, Brooklyn, NY 11210, USA;
| | - Mudar Dalloul
- Department of Obstetrics and Gynecology, SUNY Downstate Health Sciences University, Brooklyn, NY 11203, USA; (M.D.); (H.M.)
| | - Joan Hittelman
- Department of Psychology, SUNY Downstate Health Sciences University, Brooklyn, NY 11203, USA;
| | - Lawrence Fordjour
- Department of Pediatrics, SUNY Downstate Health Sciences University, Brooklyn, NY 11203, USA;
| | - Lori Hoepner
- Department of Environmental and Occupational Health Sciences, SUNY Downstate Health Sciences University, Brooklyn, NY 11203, USA;
| | - Itamar D. Futterman
- Departments of Obstetrics and Gynecology, Division of Maternal Fetal Medicine, Maimonides Medical Center, Brooklyn, NY 11219, USA;
| | - Howard Minkoff
- Department of Obstetrics and Gynecology, SUNY Downstate Health Sciences University, Brooklyn, NY 11203, USA; (M.D.); (H.M.)
- Departments of Obstetrics and Gynecology, Division of Maternal Fetal Medicine, Maimonides Medical Center, Brooklyn, NY 11219, USA;
| | - Xinyin Jiang
- PhD Program in Biochemistry, Graduate Center of the City University of New York, New York, NY 10016, USA;
- Department of Health and Nutrition Sciences, Brooklyn College of the City University of New York, Brooklyn, NY 11210, USA;
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13
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Takekoshi H, Fujishima M, Miyazawa T, Higuchi O, Fujikawa T, Miyazawa T. Simultaneous Intake of Chlorella and Ascidian Ethanolamine Plasmalogen Accelerates Activation of BDNF-TrkB-CREB Signaling in Rats. Molecules 2024; 29:357. [PMID: 38257270 PMCID: PMC10819417 DOI: 10.3390/molecules29020357] [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: 10/29/2023] [Revised: 12/22/2023] [Accepted: 01/04/2024] [Indexed: 01/24/2024] Open
Abstract
Brain-derived neurotrophic factor (BDNF) plays an important role in neurogenesis, synaptic plasticity, and cognition. BDNF is a neurotrophin that binds to tropomyosin receptor kinase B (TrkB), a specific receptor on target cell surfaces; it acts on neuronal formation, development, growth, and repair via transcription factors, such as cAMP response element-binding protein (CREB), and it is involved in learning and memory. BDNF expression is decreased in patients with Alzheimer's disease (AD). Exercise and the intake of several different foods or ingredients can increase BDNF expression, as confirmed with lutein, xanthophylls (polar carotenoids), and ethanolamine plasmalogen (PlsEtn), which are present at high levels in the brain. This study examined the effects of combining lutein and PlsEtn using lutein-rich Chlorella and ascidian extracts containing high levels of PlsEtn bearing docosahexaenoic acid, which is abundant in the human brain, on the activation of the BDNF-TrkB-CREB signaling pathway in the hippocampus of Sprague-Dawley rats. Although activation of the BDNF-TrkB-CREB signaling pathway in the hippocampus was not observed in Chlorella or ascidian PlsEtn monotherapy, activation was observed with combination therapy at an equal dose. The results of this study suggest that the combination of Chlorella and ascidian PlsEtn may have a preventive effect against dementia, including AD.
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Affiliation(s)
- Hideo Takekoshi
- Production and Development Department, Sun Chlorella Corp., Kyoto 600-8177, Japan;
| | - Masaki Fujishima
- Production and Development Department, Sun Chlorella Corp., Kyoto 600-8177, Japan;
| | - Taiki Miyazawa
- Food Biotechnology Platform Promoting Project, New Industry Creation Hatchery Center (NICHe), Tohoku University, Sendai 980-8579, Japan; (T.M.); (O.H.); (T.M.)
| | - Ohki Higuchi
- Food Biotechnology Platform Promoting Project, New Industry Creation Hatchery Center (NICHe), Tohoku University, Sendai 980-8579, Japan; (T.M.); (O.H.); (T.M.)
- Biodynamic Plant Institute Co., Ltd., Sapporo 004-0015, Japan
| | - Takahiko Fujikawa
- Laboratory of Molecular Prophylaxis and Pharmacology, Graduate School of Pharmaceutical Sciences, Suzuka University of Medical Science, Suzuka 513-8670, Japan;
| | - Teruo Miyazawa
- Food Biotechnology Platform Promoting Project, New Industry Creation Hatchery Center (NICHe), Tohoku University, Sendai 980-8579, Japan; (T.M.); (O.H.); (T.M.)
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14
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Twitto-Greenberg R, Liraz-Zaltsman S, Michaelson DM, Liraz O, Lubitz I, Atrakchi-Baranes D, Shemesh C, Ashery U, Cooper I, Harari A, Harats D, Schnaider-Beeri M, Shaish A. 9-cis beta-carotene-enriched diet significantly improved cognition and decreased Alzheimer's disease neuropathology and neuroinflammation in Alzheimer's disease-like mouse models. Neurobiol Aging 2024; 133:16-27. [PMID: 38381472 DOI: 10.1016/j.neurobiolaging.2023.09.005] [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: 02/16/2023] [Revised: 09/10/2023] [Accepted: 09/17/2023] [Indexed: 02/22/2024]
Abstract
A significant progressive decline in beta-carotene (βC) levels in the brain is associated with cognitive impairment and a higher prevalence of Alzheimer's disease (AD). In this study, we investigated whether the administration of 9-cis beta-carotene (9CBC)-rich powder of the alga Dunaliella bardawil, the best-known source of βC in nature, inhibits the development of AD-like neuropathology and cognitive deficits. We demonstrated that in 3 AD mouse models, Tg2576, 5xFAD, and apoE4, 9CBC treatment improved long- and short-term memory, decreased neuroinflammation, and reduced the prevalence of β-amyloid plaques and tau hyperphosphorylation. These findings suggest that 9CBC has the potential to be an effective preventive and symptomatic AD therapy.
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Affiliation(s)
- Rachel Twitto-Greenberg
- The Bert W. Strassburger Metabolic Center, Sheba Medical Center, Ramat-Gan, Israel; The Department of Neurobiology, George S. Wise Faculty of Life Sciences, Tel-Aviv University, Tel-Aviv, Israel; The Joseph Sagol Neuroscience Center, Sheba Medical Center, Ramat-Gan, Israel
| | - Sigal Liraz-Zaltsman
- The Joseph Sagol Neuroscience Center, Sheba Medical Center, Ramat-Gan, Israel; Department of Pharmacology, Institute for Drug Research, Hebrew University, Jerusalem, Israel; Institutes for Health and Medical Professions, Department of Sports Therapy, Ono Academic College, Kyrat-Ono, Israel
| | - Daniel M Michaelson
- The Department of Neurobiology, George S. Wise Faculty of Life Sciences, Tel-Aviv University, Tel-Aviv, Israel
| | - Ori Liraz
- The Department of Neurobiology, George S. Wise Faculty of Life Sciences, Tel-Aviv University, Tel-Aviv, Israel
| | - Irit Lubitz
- The Joseph Sagol Neuroscience Center, Sheba Medical Center, Ramat-Gan, Israel
| | | | - Chen Shemesh
- The Joseph Sagol Neuroscience Center, Sheba Medical Center, Ramat-Gan, Israel
| | - Uri Ashery
- The Department of Neurobiology, George S. Wise Faculty of Life Sciences, Tel-Aviv University, Tel-Aviv, Israel
| | - Itzik Cooper
- The Joseph Sagol Neuroscience Center, Sheba Medical Center, Ramat-Gan, Israel; Institutes for Health and Medical Professions, Department of Sports Therapy, Ono Academic College, Kyrat-Ono, Israel
| | - Ayelet Harari
- The Bert W. Strassburger Metabolic Center, Sheba Medical Center, Ramat-Gan, Israel
| | - Dror Harats
- The Bert W. Strassburger Metabolic Center, Sheba Medical Center, Ramat-Gan, Israel; The Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | | | - Aviv Shaish
- The Bert W. Strassburger Metabolic Center, Sheba Medical Center, Ramat-Gan, Israel; Department of Life Sciences, Achva Academic College, Be'er-Tuvia Regional Council, Israel.
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15
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Kritz-Silverstein D, Bettencourt R. The Longitudinal Association of Egg Consumption with Cognitive Function in Older Men and Women: The Rancho Bernardo Study. Nutrients 2023; 16:53. [PMID: 38201883 PMCID: PMC10780661 DOI: 10.3390/nu16010053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 12/20/2023] [Accepted: 12/21/2023] [Indexed: 01/12/2024] Open
Abstract
This study examines the prospective association of egg consumption with multiple domains of cognitive function in older, community-dwelling men and women followed for 16.3 years. Participants were 617 men and 898 women from the Rancho Bernardo Cohort aged 60 and older, who were surveyed about egg intake/week in 1972-1974, and attended a 1988-1991 research visit, where cognitive function was assessed with 12 tests. Analyses showed that egg intake ranged from 0-24/week (means: men = 4.2 ± 3.2; women = 3.5 ± 2.7; p < 0.0001). In men, covariate-adjusted regressions showed that egg intake was associated with better performance on Buschke total (p = 0.04), long-term (p = 0.02), and short-term (p = 0.05) recall. No significant associations were observed in women (p's > 0.05). Analyses showed that in those aged <60y in 1972-1974, egg intake was positively associated with scores on Heaton copying (p < 0.04) and the Mini-Mental Status Exam (MMSE; p < 0.02) in men and category fluency (p < 0.05) in women. Egg intake was not significantly associated with odds of poor performance on MMSE, Trails B, or category fluency in either sex. These reassuring findings suggest that there are no long-term detrimental effects of egg consumption on multiple cognitive function domains, and for men, there may be beneficial effects for verbal episodic memory. Egg consumption in middle age may also be related to better cognitive performance later in life.
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Affiliation(s)
- Donna Kritz-Silverstein
- Herbert Wertheim School of Public Health and Longevity Science, University of California San Diego, La Jolla, CA 92093-0725, USA
- Department of Family Medicine, School of Medicine, University of California San Diego, La Jolla, CA 92093-0725, USA
| | - Ricki Bettencourt
- Division of Gastroenterology and Hepatology, School of Medicine, University of California San Diego, La Jolla, CA 92093-0725, USA;
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16
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Zhu Q, Gao Z, Peng J, Liu C, Wang X, Li S, Zhang H. Lycopene Alleviates Chronic Stress-Induced Hippocampal Microglial Pyroptosis by Inhibiting the Cathepsin B/NLRP3 Signaling Pathway. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:20034-20046. [PMID: 38054647 DOI: 10.1021/acs.jafc.3c02749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
Lycopene (LYC) exerts a strong neuroprotective and antipyroptotic effects. This study explored the effects and mechanisms of LYC on chronic stress-induced hippocampal microglial damage and depression-like behaviors. The caspase-1 inhibitor VX-765 attenuated chronic restrain stress (CRS)-induced hippocampal microglial pyroptosis and depression-like behaviors. Moreover, the alleviation of CRS-induced hippocampal microglial pyroptosis and depression-like behaviors by LYC was associated with the cathepsin B/NLRP3 pathway. In vitro, the caspase-1 inhibitor Z-YVAD-FMK alleviated pyroptosis in highly aggressively proliferating immortalized (HAPI) cells. Additionally, the alleviation of corticosterone-induced HAPI cell damage and pyroptosis by LYC was associated with the cathepsin B/NLRP3 pathway. Furthermore, the cathepsin B agonist pazopanib promoted HAPI cell pyroptosis, whereas LYC inhibited pazopanib-induced pyroptosis via the cathepsin B/NLRP3 pathway. Similarly, Z-YVAD-FMK inhibited pazopanib-induced HAPI cell pyroptosis. These results suggest that LYC alleviates chronic stress-induced hippocampal microglial pyroptosis via the cathepsin B/NLRP3 pathway inhibition. This study provides a new strategy for treating chronic stress encephalopathy.
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Affiliation(s)
- Qiuxiang Zhu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong 510642, People's Republic of China
| | - Zhicheng Gao
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong 510642, People's Republic of China
| | - Jinghui Peng
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong 510642, People's Republic of China
| | - Chang Liu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong 510642, People's Republic of China
| | - Xiaoyue Wang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong 510642, People's Republic of China
| | - Shoujun Li
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong 510642, People's Republic of China
| | - Haiyang Zhang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong 510642, People's Republic of China
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Liu Y, Yang G, Huo S, Wu J, Ren P, Cao Y, Gao J, Tong L, Min D. Lutein suppresses ferroptosis of cardiac microvascular endothelial cells via positive regulation of IRF in cardiac hypertrophy. Eur J Pharmacol 2023; 959:176081. [PMID: 37797674 DOI: 10.1016/j.ejphar.2023.176081] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 09/09/2023] [Accepted: 09/25/2023] [Indexed: 10/07/2023]
Abstract
Cardiac microvascular dysfunction contributes to cardiac hypertrophy (CH) and can progress to heart failure. Lutein is a carotenoid with various pharmacological properties, such as anti-apoptotic, anti-inflammatory, and antioxidant effects. Limited research has been conducted on the effects of lutein on pressure overload-induced CH. Studies have shown that CH is accompanied by ferroptosis in the cardiac microvascular endothelial cells (CMECs). This study aimed to investigate the effect of lutein on ferroptosis of CMECs in CH. The transcription factor interferon regulatory factor (IRF) is associated with immune system function, tumor suppression, and apoptosis. The results of this study suggested that pressure overload primarily inhibits IRF expression, resulting in endothelial ferroptosis. Administration of lutein increased the expression of IRF, providing protection to endothelial cells during pressure overload. IRF silencing downregulated solute carrier family 7 member 11 (SLC7A11) and glutathione peroxidase 4 (GPX4) expression, leading to the induction of ferroptosis in CMECs. Lutein supplementation suppressed endothelial ferroptosis by upregulating IRF. These data suggest that IRF may function as a transcription factor for SLC7A11 and that lutein represses ferroptosis in CMECs by upregulating IRF expression. Therefore, targeting IRF may be a promising therapeutic strategy for effective cardioprotection in patients with CH and heart failure.
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Affiliation(s)
- Yang Liu
- Department of Basic Nursing, Harbin Medical University-Daqing, Daqing, Heilongjiang, China
| | - Guanlin Yang
- Key Laboratory of Ministry of Education for Traditional Chinese Medicine Viscera-State Theory and Applications, Liaoning University of Traditional Chinese Medicine, Shenyang, Liaoning, China
| | - Shiqiao Huo
- Department of Rehabilitation, Beijing Rehabilitation Hospital of Capital Medical University, Beijing, China
| | - Jiabi Wu
- Department of Pharmacology, Harbin Medical University-Daqing, Daqing, Heilongjiang, China
| | - Ping Ren
- Department of Pharmacology, Harbin Medical University-Daqing, Daqing, Heilongjiang, China
| | - Yonggang Cao
- Department of Pharmacology, Harbin Medical University-Daqing, Daqing, Heilongjiang, China
| | - Jingquan Gao
- Department of Nursing, School of Medicine, Lishui University, Lishui, China.
| | - Liquan Tong
- Department of General Surgery, The Fifth Affiliated Hospital of Harbin Medical University, Daqing, China.
| | - Dongyu Min
- Affiliated Hospital of Liaoning University of Traditional Chinese Medicine, Shenyang, China.
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18
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Almaguer J, Hindle A, Lawrence JJ. The Contribution of Hippocampal All-Trans Retinoic Acid (ATRA) Deficiency to Alzheimer's Disease: A Narrative Overview of ATRA-Dependent Gene Expression in Post-Mortem Hippocampal Tissue. Antioxidants (Basel) 2023; 12:1921. [PMID: 38001775 PMCID: PMC10669734 DOI: 10.3390/antiox12111921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 10/04/2023] [Accepted: 10/05/2023] [Indexed: 11/26/2023] Open
Abstract
There is accumulating evidence that vitamin A (VA) deficiency contributes to the pathogenesis and progression of Alzheimer's disease (AD). All-trans retinoic acid (ATRA), a metabolite of VA in the brain, serves distinct roles in the human hippocampus. Agonists of retinoic acid receptors (RAR), including ATRA, promote activation of the non-amyloidogenic pathway by enhancing expression of α-secretases, providing a mechanistic basis for delaying/preventing amyloid beta (Aβ) toxicity. However, whether ATRA is actually deficient in the hippocampi of patients with AD is not clear. Here, using a publicly available human transcriptomic dataset, we evaluated the extent to which ATRA-sensitive genes are dysregulated in hippocampal tissue from post-mortem AD brains, relative to age-matched controls. Consistent with ATRA deficiency, we found significant dysregulation of many ATRA-sensitive genes and significant upregulation of RAR co-repressors, supporting the idea of transcriptional repression of ATRA-mediated signaling. Consistent with oxidative stress and neuroinflammation, Nrf2 and NfkB transcripts were upregulated, respectively. Interestingly, transcriptional targets of Nrf2 were not upregulated, accompanied by upregulation of several histone deacetylases. Overall, our investigation of ATRA-sensitive genes in the human hippocampus bolsters the scientific premise of ATRA depletion in AD and that epigenetic factors should be considered and addressed as part of VA supplementation.
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Affiliation(s)
- Joey Almaguer
- Department of Pharmacology and Neuroscience, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA;
| | - Ashly Hindle
- Department of Pharmacology and Neuroscience and Garrison Institute on Aging, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA;
| | - J. Josh Lawrence
- Department of Pharmacology and Neuroscience, Garrison Institute on Aging, Center of Excellence for Translational Neuroscience and Therapeutics, and Center of Excellence for Integrated Health, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
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19
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Abrego-Guandique DM, Bonet ML, Caroleo MC, Cannataro R, Tucci P, Ribot J, Cione E. The Effect of Beta-Carotene on Cognitive Function: A Systematic Review. Brain Sci 2023; 13:1468. [PMID: 37891835 PMCID: PMC10605009 DOI: 10.3390/brainsci13101468] [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: 09/17/2023] [Revised: 10/11/2023] [Accepted: 10/15/2023] [Indexed: 10/29/2023] Open
Abstract
β-carotene is a powerful antioxidant and dietary precursor of vitamin A whose role in maintaining mental health and cognitive performance, either alone or in combination with other dietary compounds, has been a topic of recent research. However, its effectiveness is still unclear. This systematic review, conducted according to the PRISMA guideline and assisted by the MySLR platform, addressed this issue. A total of 16 eligible original research articles were identified. Dietary intake or β-carotene serum levels were associated with improved measures of cognitive function in 7 out of 10 epidemiological studies included. In intervention studies, β-carotene consumption alone did not promote better cognitive function in the short term, but only in a long-term intervention with a mean duration of 18 years. However, all but one intervention study suggested the beneficial effects of β-carotene supplementation at doses ranging from 6 mg to 50 mg per day in combination with a multicomplex such as vitamin E, vitamin C, zinc, or selenium for a period of 16 weeks to 20 years. Despite the current limitations, the available evidence suggests a potential association between β-carotene dietary/supplementary intake and the maintenance of cognitive function. The β-carotene most probably does not act alone but in synergy with other micronutrients.
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Affiliation(s)
- Diana Marisol Abrego-Guandique
- Department of Health Sciences, University of Magna Graecia Catanzaro, 88100 Catanzaro, Italy; (D.M.A.-G.); (M.C.C.)
- Galascreen Laboratories, University of Calabria, 87036 Rende, Italy;
| | - Maria Luisa Bonet
- Laboratory of Molecular Biology, Nutrition, and Biotechnology (LBNB), Universitat de les Illes Balears, 07122 Palma, Spain; (M.L.B.); (J.R.)
- Institut d’Investigació Sanitària Illes Balears (IdISBa), 07120 Palma, Spain
- CIBER de Fisiopatología de la Obesidad y Nutrición (CIBERobn), 07122 Palma, Spain
| | - Maria Cristina Caroleo
- Department of Health Sciences, University of Magna Graecia Catanzaro, 88100 Catanzaro, Italy; (D.M.A.-G.); (M.C.C.)
- Galascreen Laboratories, University of Calabria, 87036 Rende, Italy;
| | - Roberto Cannataro
- Galascreen Laboratories, University of Calabria, 87036 Rende, Italy;
- Research Division, Dynamical Business & Science Society, DBSS International SAS, Bogota 110311, Colombia
| | - Paola Tucci
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Italy;
| | - Joan Ribot
- Laboratory of Molecular Biology, Nutrition, and Biotechnology (LBNB), Universitat de les Illes Balears, 07122 Palma, Spain; (M.L.B.); (J.R.)
- Institut d’Investigació Sanitària Illes Balears (IdISBa), 07120 Palma, Spain
- CIBER de Fisiopatología de la Obesidad y Nutrición (CIBERobn), 07122 Palma, Spain
| | - Erika Cione
- Galascreen Laboratories, University of Calabria, 87036 Rende, Italy;
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Italy;
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20
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Bardinet J, Pouchieu C, Chuy V, Helmer C, Etheve S, Gaudout D, Samieri C, Berr C, Delcourt C, Cougnard-Grégoire A, Féart C. Plasma carotenoids and risk of depressive symptomatology in a population-based cohort of older adults. J Affect Disord 2023; 339:615-623. [PMID: 37467792 DOI: 10.1016/j.jad.2023.07.076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 06/22/2023] [Accepted: 07/14/2023] [Indexed: 07/21/2023]
Abstract
BACKGROUND As part of a healthy diet, higher carotenoid intakes have been associated with a reduced risk of depression, mainly in adults, while prospective studies on plasma carotenoids in older adults are lacking. The aim of this study was to assess the prospective association between plasma carotenoids and the risk of Depressive Symptomatology (DS) in older adults. METHODS The study sample was based on the Three-City cohort of adults aged 65y+ free from DS at enrollment in 1999. Plasma carotenoids were measured at baseline. DS was assessed every 2-3 years over 17 years and defined by a Center for Epidemiologic Studies-Depression Scale score ≥ 16 and/or by antidepressant use. The association between plasma carotenoids or carotenoid/lipids (cholesterol and triglycerides) ratio and the risk for DS was assessed through multiple random-effect logistic regression. RESULTS The study sample was composed of 1010 participants (mean age 74 y (±4.9), 58 % of women) followed-up during a median time of 13.4 years. Plasma zeaxanthin and ratios of zeaxanthin/lipids, lutein+zeaxanthin/lipids and β-carotene/lipids were independently associated with a significant reduced risk of DS over time (Odds ratio (OR) = 0.81, 95 % Confidence Interval (CI) [0.67;0.99], OR = 0.79 [0.67;0.98], OR = 0.79 [0.64;0.94] and OR = 0.80 [0.66;0.97] for +1 standard deviation of each exposure respectively). LIMITATIONS Plasma carotenoids were only available at study baseline. CONCLUSION Focusing on circulating carotenoids and considering lipids levels, the present results suggested an association between higher levels of plasma zeaxanthin, combined lutein+zeaxanthin and β-carotene and a decreased risk of DS over time in older adults.
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Affiliation(s)
- Jeanne Bardinet
- Univ. Bordeaux, INSERM, BPH, U1219, F-33000 Bordeaux, France; Activ'Inside, 33750 Beychac-et-Caillau, France.
| | | | - Virginie Chuy
- Univ. Bordeaux, INSERM, BPH, U1219, F-33000 Bordeaux, France; Univ. Bordeaux, CHU Bordeaux, Department of Dentistry and Oral Health, F-33000 Bordeaux, France
| | - Catherine Helmer
- Univ. Bordeaux, INSERM, BPH, U1219, F-33000 Bordeaux, France; Clinical and Epidemiological Research Unit, INSERM CIC1401, F-33000 Bordeaux, France
| | | | | | - Cécilia Samieri
- Univ. Bordeaux, INSERM, BPH, U1219, F-33000 Bordeaux, France
| | - Claudine Berr
- INM, Univ Montpellier, INSERM, F-34091 Montpellier, France
| | - Cécile Delcourt
- Univ. Bordeaux, INSERM, BPH, U1219, F-33000 Bordeaux, France
| | | | - Catherine Féart
- Univ. Bordeaux, INSERM, BPH, U1219, F-33000 Bordeaux, France
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21
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Cannavale CN, Keye SA, Rosok LM, Martell SG, Holthaus TA, Raine LR, Mullen SP, Holscher HD, Hillman CH, Kramer AF, Cohen NJ, Hammond BR, Renzi-Hammond L, Khan NA. Macular Pigment Optical Density and Skin Carotenoids in a Childhood Sample. J Nutr 2023; 153:3144-3151. [PMID: 37315793 PMCID: PMC10613722 DOI: 10.1016/j.tjnut.2023.06.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 05/15/2023] [Accepted: 06/06/2023] [Indexed: 06/16/2023] Open
Abstract
BACKGROUND Carotenoids are plant pigments with light filtering and antioxidant properties that deposit in human tissues, including retina and skin. Descriptive characteristics and covariates of carotenoid status in macula and skin have been examined in adults; however, similar studies in children are limited. Thus, this study aimed to delineate how factors of age, sex, race, weight status, and dietary carotenoid intake relate to macular and skin carotenoids in children. METHODS Children (7-13 y, N = 375) completed heterochromatic flicker photometry to assess macular pigment optical density (MPOD). Participants underwent anthropometrics to measure weight status (BMI percentile [BMI%]), and parent/guardian provided demographic information. Subsample data were available for skin carotenoids (N = 181), assessed using reflection spectroscopy, and dietary carotenoids (N = 101) using the Block Food Frequency Questionnaire. Relationships between skin and macular carotenoids were assessed using partial Pearson's correlations controlling for age, sex, race, and BMI%. Relationships between dietary carotenoids and macular and skin carotenoids were assessed using stepwise linear regression including age, sex, race, and BMI% in the model. RESULTS Mean MPOD was 0.56 ± 0.22 and skin carotenoid score was 282 ± 94.6. There was no significant correlation between MPOD and skin carotenoids (r = 0.02, P = 0.76). BMI% was negatively associated with skin (stdβ = -0.42, P < 0.001), but not macular carotenoids (stdβ = -0.04, P = 0.70). Neither MPOD nor skin carotenoids were associated with age, sex, or race (all P > 0.10). MPOD was positively associated with energy-adjusted reported lutein + zeaxanthin intake (stdβ = 0.27, P = 0.01). Skin carotenoids were positively associated with energy-adjusted reported carotenoid intake (stdβ = 0.26, P = 0.01). CONCLUSIONS The mean MPOD values in children were higher than what has been reported in adult populations. Previous studies in adult samples report an average MPOD of 0.21. Although macular and skin carotenoids were not related, they were associated with dietary carotenoids relevant to the respective tissues; however, skin carotenoids may be more susceptible negative influence from higher weight status.
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Affiliation(s)
- Corinne N Cannavale
- Department of Kinesiology and Community Health, University of Illinois Urbana-Champaign, Urbana, IL
| | - Shelby A Keye
- Department of Kinesiology and Community Health, University of Illinois Urbana-Champaign, Urbana, IL
| | - Laura M Rosok
- Neuroscience Program, University of Illinois Urbana-Champaign, Urbana, IL
| | - Shelby G Martell
- Neuroscience Program, University of Illinois Urbana-Champaign, Urbana, IL
| | - Tori A Holthaus
- Division of Nutritional Sciences, University of Illinois Urbana-Champaign, Urbana, IL
| | - Lauren R Raine
- Center for Cognitive and Brain Health, Northeastern University, Boston, MA; Department of Physical Activity, Movement, & Rehabilitation Sciences, Northeastern University, Boston, MA; Department of Medical Sciences, Northeastern University, Boston, MA
| | - Sean P Mullen
- Department of Kinesiology and Community Health, University of Illinois Urbana-Champaign, Urbana, IL; Beckman Institute for the Advancement of Science and Technology, University of Illinois Urbana-Champaign, Urbana, IL; Informatics Programs, University of Illinois Urbana-Champaign, Urbana, IL; Center for Social and Behavioral Sciences, University of Illinois Urbana-Champaign, Urbana, IL
| | - Hannah D Holscher
- Division of Nutritional Sciences, University of Illinois Urbana-Champaign, Urbana, IL
| | - Charles H Hillman
- Center for Cognitive and Brain Health, Northeastern University, Boston, MA; Department of Physical Activity, Movement, & Rehabilitation Sciences, Northeastern University, Boston, MA; Department of Psychology, Northeastern University, Boston, MA
| | - Arthur F Kramer
- Center for Cognitive and Brain Health, Northeastern University, Boston, MA; Department of Psychology, Northeastern University, Boston, MA; Beckman Institute for the Advancement of Science and Technology, University of Illinois Urbana-Champaign, Urbana, IL
| | - Neal J Cohen
- Neuroscience Program, University of Illinois Urbana-Champaign, Urbana, IL; Department of Psychology, University of Illinois Urbana-Champaign, Urbana, IL; Interdisciplinary Health Science Institute, University of Illinois Urbana-Champaign, Urbana, IL
| | | | | | - Naiman A Khan
- Department of Kinesiology and Community Health, University of Illinois Urbana-Champaign, Urbana, IL; Neuroscience Program, University of Illinois Urbana-Champaign, Urbana, IL; Division of Nutritional Sciences, University of Illinois Urbana-Champaign, Urbana, IL; Beckman Institute for the Advancement of Science and Technology, University of Illinois Urbana-Champaign, Urbana, IL.
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22
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Widomska J, Subczynski WK, Welc-Stanowska R, Luchowski R. An Overview of Lutein in the Lipid Membrane. Int J Mol Sci 2023; 24:12948. [PMID: 37629129 PMCID: PMC10454802 DOI: 10.3390/ijms241612948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 08/10/2023] [Accepted: 08/16/2023] [Indexed: 08/27/2023] Open
Abstract
Lutein, zeaxanthin, and meso-zeaxanthin (a steroisomer of zeaxanthin) are macular pigments. They modify the physical properties of the lipid bilayers in a manner similar to cholesterol. It is not clear if these pigments are directly present in the lipid phase of the membranes, or if they form complexes with specific membrane proteins that retain them in high amounts in the correct place in the retina. The high content of macular pigments in the Henle fiber layer indicates that a portion of the lutein and zeaxanthin should not only be bound to the specific proteins but also directly dissolved in the lipid membranes. This high concentration in the prereceptoral region of the retina is effective for blue-light filtration. Understanding the basic mechanisms of these actions is necessary to better understand the carotenoid-membrane interaction and how carotenoids affect membrane physical properties-such as fluidity, polarity, and order-in relation to membrane structure and membrane dynamics. This review focuses on the properties of lutein.
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Affiliation(s)
- Justyna Widomska
- Department of Biophysics, Medical University of Lublin, 20-090 Lublin, Poland
| | - Witold K. Subczynski
- Department of Biophysics, Medical College on Wisconsin, Milwaukee, WI 53226, USA;
| | | | - Rafal Luchowski
- Department of Biophysics, Institute of Physics, Maria Curie-Sklodowska University, 20-031 Lublin, Poland;
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23
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Christifano DN, Chollet-Hinton L, Hoyer D, Schmidt A, Gustafson KM. Intake of eggs, choline, lutein, zeaxanthin, and DHA during pregnancy and their relationship to fetal neurodevelopment. Nutr Neurosci 2023; 26:749-755. [PMID: 35715980 PMCID: PMC9758270 DOI: 10.1080/1028415x.2022.2088944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
BACKGROUND Maternal intake of eggs and nutrients contained within eggs during pregnancy have the potential to impact fetal neurodevelopment; however, this area is understudied. The purpose of this study was to determine whether maternal egg and choline intake and nutrient interactions between choline, lutein and zeaxanthin (L/Z), and DHA predict fetal neurodevelopment in a large cohort of pregnant women (n = 202). NCT02709239. METHODS Food frequency questionnaires were used to assess egg and nutrient intake during pregnancy. Fetal neurodevelopment was measured using fetal biomagnetometry at 32 and 36wks gestation, and fetal autonomic indices (SDNN, RMSSD) and brain maturation indices (fABAS) were calculated. Generalized linear models tested the relationships between choline intake, egg intake, and nutrient interactions with fetal neurodevelopment. RESULTS Maternal egg intake predicted RMSSD at 32wks and fABAS at 36wks. The interaction between choline and L/Z intake predicted fABAS at 32wks and 36wks and the interaction between choline intake, L/Z intake, and DHA predicted fABAS at 36wks. At 36wks, SDNN was predicted by L/Z intake and interactions between choline and L/Z, L/Z and DHA, and choline, L/Z, and DHA. CONCLUSION Eggs and the nutrients contained within eggs showed synergistic associations with fetal neurodevelopment, and consumption should be encouraged among pregnant women.
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Affiliation(s)
- Danielle N Christifano
- Department of Nutrition and Dietetics, University of Kansas Medical Center, Kansas City, KS, USA
- Department of Dietetics and Nutrition, University of Kansas Medical Center, Kansas City, KS, USA
| | - Lynn Chollet-Hinton
- Department of Biostatistics & Data Science, University of Kansas Medical Center, Kansas City, KS, USA
| | - Dirk Hoyer
- Biomagnetic Center, Hans Berger Department of Neurology, Jena University Hospital, Jena, Germany
| | - Alexander Schmidt
- Biomagnetic Center, Hans Berger Department of Neurology, Jena University Hospital, Jena, Germany
- Department of Obstetrics, Jena University Hospital, Jena, Germany
| | - Kathleen M Gustafson
- Department of Dietetics and Nutrition, University of Kansas Medical Center, Kansas City, KS, USA
- Department of Neurology, University of Kansas Medical Center, Kansas City, KS, USA
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24
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Sueyasu T, Yasumoto K, Tokuda H, Kaneda Y, Obata H, Rogi T, Izumo T, Kondo S, Saito J, Tsukiura T, Nakai M. Effects of Long-Chain Polyunsaturated Fatty Acids in Combination with Lutein and Zeaxanthin on Episodic Memory in Healthy Older Adults. Nutrients 2023; 15:2825. [PMID: 37447152 DOI: 10.3390/nu15132825] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 06/07/2023] [Accepted: 06/19/2023] [Indexed: 07/15/2023] Open
Abstract
Arachidonic acid (ARA), docosahexaenoic acid (DHA), and eicosapentaenoic acid (EPA), which are long-chain polyunsaturated fatty acids (LCPUFAs), as well as lutein (L) and zeaxanthin (Z), can potentially improve brain function. However, the effect of a combination of these components (LCPUFAs + LZ) on memory function in healthy older individuals remains unclear. This study aimed to determine if LCPUFAs + LZ-supplemented food could improve memory function. Exploratory and confirmatory trials (Trials 1 and 2, respectively) were conducted in healthy older Japanese individuals with memory complaints. We conducted randomized, double-blind, placebo-controlled, parallel-group trials. Participants were randomly allocated to two groups: placebo or LCPUFAs + LZ. LCPUFAs + LZ participants were provided with supplements containing ARA, DHA, EPA, L, and Z for 24 weeks in Trial 1 and 12 weeks in Trial 2. Memory functions were evaluated using Cognitrax before and after each trial. Combined analyses were performed for subgroups of participants with cognitive decline in Trials 1 and 2. The results showed that supplementation with LCPUFAs + LZ did not significantly affect memory function in healthy, non-demented, older individuals with memory complaints whereas it improved memory function in healthy, non-demented, older individuals with cognitive decline.
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Affiliation(s)
- Toshiaki Sueyasu
- Institute for Science of Life, Suntory Wellness Limited, 8-1-1 Seikadai, Seika-cho, Soraku-gun, Kyoto 619-0284, Japan
| | - Keisuke Yasumoto
- Institute for Science of Life, Suntory Wellness Limited, 8-1-1 Seikadai, Seika-cho, Soraku-gun, Kyoto 619-0284, Japan
| | - Hisanori Tokuda
- Institute for Science of Life, Suntory Wellness Limited, 8-1-1 Seikadai, Seika-cho, Soraku-gun, Kyoto 619-0284, Japan
| | - Yoshihisa Kaneda
- Institute for Science of Life, Suntory Wellness Limited, 8-1-1 Seikadai, Seika-cho, Soraku-gun, Kyoto 619-0284, Japan
| | - Hidenori Obata
- Institute for Science of Life, Suntory Wellness Limited, 8-1-1 Seikadai, Seika-cho, Soraku-gun, Kyoto 619-0284, Japan
| | - Tomohiro Rogi
- Institute for Science of Life, Suntory Wellness Limited, 8-1-1 Seikadai, Seika-cho, Soraku-gun, Kyoto 619-0284, Japan
| | - Takayuki Izumo
- Institute for Science of Life, Suntory Wellness Limited, 8-1-1 Seikadai, Seika-cho, Soraku-gun, Kyoto 619-0284, Japan
| | - Sumio Kondo
- Fukushima Healthcare Center, Medical Corporation Kenshokai, 2-12-16, Tamagawa, Fukushima-ku, Osaka 553-0044, Japan
| | - Jiro Saito
- Medical Station Clinic, 3-12-8, Takaban, Meguro-ku, Tokyo 152-0004, Japan
| | - Takashi Tsukiura
- Department of Cognitive, Behavioral and Health Sciences, Graduate School of Human and Environmental Studies, Kyoto University, Yoshida Nihonmatsu-cho, Sakyo-ku, Kyoto 606-8501, Japan
| | - Masaaki Nakai
- Institute for Science of Life, Suntory Wellness Limited, 8-1-1 Seikadai, Seika-cho, Soraku-gun, Kyoto 619-0284, Japan
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25
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Cerna J, Edwards CG, Martell S, Athari Anaraki NS, Walk ADM, Robbs CM, Adamson BC, Flemming IR, Labriola L, Motl RW, Khan NA. Neuroprotective influence of macular xanthophylls and retinal integrity on cognitive function among persons with multiple sclerosis. Int J Psychophysiol 2023; 188:24-32. [PMID: 36907558 DOI: 10.1016/j.ijpsycho.2023.03.002] [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: 09/18/2022] [Revised: 03/02/2023] [Accepted: 03/07/2023] [Indexed: 03/13/2023]
Abstract
BACKGROUND No studies to date have examined if macular xanthophyll accumulation and retinal integrity are independently associated with cognitive function in individuals with multiple sclerosis (MS). This study explored whether macular xanthophyll accumulation and structural morphometry in the retina were associated with behavioral performance and neuroelectric function during a computerized cognitive task among persons with MS and healthy controls (HCs). METHODS 42 HCs and 42 individuals with MS aged 18-64 years were enrolled. Macular pigment optical density (MPOD) was measured using heterochromatic flicker photometry. Optic disc retinal nerve fiber layer (odRNFL), macular retinal nerve fiber layer, and total macular volume were assessed via optical coherence tomography. Attentional inhibition was assessed using an Eriksen flanker task while underlying neuroelectric function was recorded using event-related potentials. RESULTS Persons with MS had a slower reaction time, lower accuracy, and delayed P3 peak latency time during both congruent and incongruent trials compared with HCs. Within the MS group, MPOD explained variance in incongruent P3 peak latency, and odRNFL explained variance in congruent reaction time and congruent P3 peak latency. CONCLUSIONS Persons with MS exhibited poorer attentional inhibition and slower processing speed, yet higher MPOD and odRNFL levels were independently associated with greater attentional inhibition and faster processing speed among persons with MS. Future interventions are necessary to determine if improvements in these metrics may promote cognitive function among persons with MS.
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Affiliation(s)
- Jonathan Cerna
- Neuroscience Program, University of Illinois Urbana-Champaign, United States of America
| | | | - Shelby Martell
- Neuroscience Program, University of Illinois Urbana-Champaign, United States of America
| | | | - Anne D M Walk
- Department of Psychology, Eastern Illinois University, United States of America
| | | | - Brynn C Adamson
- Department of Kinesiology and Community Health, University of Illinois Urbana-Champaign, United States of America; Department of Health Sciences, University of Colorado Colorado Springs, United States of America; Multiple Sclerosis Research Collaborative, University of Illinois, Urbana, IL, United States of America
| | - Isabel R Flemming
- Department of Health Sciences, Central Michigan University, United States of America
| | - Leanne Labriola
- Surgery, University of Illinois College of Medicine, United States of America
| | - Robert W Motl
- Department of Kinesiology and Nutrition, University of Illinois Chicago, United States of America; Multiple Sclerosis Research Collaborative, University of Illinois, Urbana, IL, United States of America
| | - Naiman A Khan
- Neuroscience Program, University of Illinois Urbana-Champaign, United States of America; Department of Kinesiology and Community Health, University of Illinois Urbana-Champaign, United States of America; Division of Nutritional Sciences, University of Illinois Urbana-Champaign, United States of America; Multiple Sclerosis Research Collaborative, University of Illinois, Urbana, IL, United States of America.
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26
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Antioxidant and Anti-Inflammatory Effects of Carotenoids in Mood Disorders: An Overview. Antioxidants (Basel) 2023; 12:antiox12030676. [PMID: 36978923 PMCID: PMC10045512 DOI: 10.3390/antiox12030676] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 02/25/2023] [Accepted: 03/07/2023] [Indexed: 03/12/2023] Open
Abstract
Depression has a multifactorial etiology comprising family history and unemployment. This review aims to summarize the evidence available for the antioxidant and anti-inflammatory effects of carotenoids in mood disorders. This review article’s methodologies were based on a search of the PubMed database for all linked published papers. Epidemiological studies indicate that a diet rich in vegetables, fruits, nuts, fish, and olive oil may prevent the development of depression. Antioxidant supplementation has been found to combat various stress-induced psychiatric disorders, including depression and anxiety. A growing body of evidence indicates that carotenoids have both antioxidant and anti-inflammatory. Studies also suggest that poor dietary intake, particularly low intakes of fruit and vegetables and high intakes of fast food and other convenience foods, may increase the risk of developing depression. Thus, dietary interventions have the potential to help mitigate the risk of mental health decline in both the general population and those with mood disorders. Considering that carotenoids have both antioxidant and anti-inflammatory effects, it is expected that they might exert a promising antidepressant effect. Nevertheless, further studies (including interventional and mechanistic studies) assessing the effect of carotenoids on preventing and alleviating depression symptoms are needed.
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27
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Revisiting the Role of Vitamins and Minerals in Alzheimer's Disease. Antioxidants (Basel) 2023; 12:antiox12020415. [PMID: 36829974 PMCID: PMC9952129 DOI: 10.3390/antiox12020415] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 02/02/2023] [Accepted: 02/03/2023] [Indexed: 02/11/2023] Open
Abstract
Alzheimer's disease (AD) is the most common type of dementia that affects millions of individuals worldwide. It is an irreversible neurodegenerative disorder that is characterized by memory loss, impaired learning and thinking, and difficulty in performing regular daily activities. Despite nearly two decades of collective efforts to develop novel medications that can prevent or halt the disease progression, we remain faced with only a few options with limited effectiveness. There has been a recent growth of interest in the role of nutrition in brain health as we begin to gain a better understanding of what and how nutrients affect hormonal and neural actions that not only can lead to typical cardiovascular or metabolic diseases but also an array of neurological and psychiatric disorders. Vitamins and minerals, also known as micronutrients, are elements that are indispensable for functions including nutrient metabolism, immune surveillance, cell development, neurotransmission, and antioxidant and anti-inflammatory properties. In this review, we provide an overview on some of the most common vitamins and minerals and discuss what current studies have revealed on the link between these essential micronutrients and cognitive performance or AD.
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A Review on Phyto-Therapeutic Approaches in Alzheimer's Disease. J Funct Biomater 2023; 14:jfb14010050. [PMID: 36662097 PMCID: PMC9861153 DOI: 10.3390/jfb14010050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 12/29/2022] [Accepted: 01/14/2023] [Indexed: 01/19/2023] Open
Abstract
Neurodegenerative diseases occur due to progressive and sometimes irreversible loss of function and death of nerve cells. A great deal of effort is being made to understand the pathogenesis of neurodegenerative diseases. In particular, the prevalence of Alzheimer's disease (AD) is quite high, and only symptomatic therapy is available due to the absence of radical treatment. The aim of this review is to try to elucidate the general pathogenesis of AD, to provide information about the limit points of symptomatic treatment approaches, and to emphasize the potential neurologic effects of phytocompounds as new tools as therapeutic agents for disease prevention, retardation, and therapy. This survey also covers the notable properties of herbal compounds such as their effects on the inhibition of an enzyme called acetylcholinesterase, which has significant value in the treatment of AD. It has been proven that phytopharmaceuticals have long-term effects that could protect nervous system health, eliminate inflammatory responses, improve cognitive damage, provide anti-aging effects in the natural aging process, and alleviate dementia sequelae. Herbal-based therapeutic agents can afford many advantages and can be used as potentially as new-generation therapeutics or complementary agents with high compliance, fewer adverse effects, and lower cost in comparison to the traditional pharmaceutical agents in the fight against AD.
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29
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Association of Dietary α-Carotene and β-Carotene Intake with Low Cognitive Performance in Older Adults: A Cross-Sectional Study from the National Health and Nutrition Examination Survey. Nutrients 2023; 15:nu15010239. [PMID: 36615894 PMCID: PMC9823947 DOI: 10.3390/nu15010239] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 12/23/2022] [Accepted: 12/28/2022] [Indexed: 01/04/2023] Open
Abstract
This study aims to examine the relationships of dietary α-carotene and β-carotene intake with cognitive function. The data were selected from the National Health and Nutrition Examination Survey (NHANES) 2011-2014. A total of 2009 participants were included in this analysis. Dietary α-carotene and β-carotene intake were averaged by two 24-h dietary recalls. The Consortium to Establish a Registry for Alzheimer's Disease Word Learning subset (CERAD W-L), Animal Fluency Test (AFT), and Digit Symbol Substitution Test (DSST) were used to evaluate cognitive function. Logistic regression and restricted cubic spline models were applied to explore the associations of dietary α-carotene and β-carotene intake with cognitive performance. After adjusting for all confounding factors, compared with individuals in the lowest quartile of β-carotene dietary intake, those in the highest quartile had lower risks of both CERAD W-L decline [odds ratio (OR) = 0.63, 95% confidence interval (CI): 0.44-0.90] and AFT decline (OR = 0.66, 95% CI: 0.47-0.94). In addition, the third quartile of β-carotene dietary intake had a significantly decreased risk of lower DSST (OR = 0.67, 95% CI: 0.48-0.83). Compared with the lowest quartile of α-carotene intake, the OR of AFT decline in the highest intake quartile was 0.66 (95% CI: 0.46, 0.94). For males, both dietary α-carotene and β-carotene intake were associated with a decreased risk of AFT decline (OR = 0.42, 95% CI: 0.25-0.71; OR = 0.51, 95% CI: 0.30-0.85, respectively). For females, dietary α-carotene intake was associated with a decreased risk of CERAD W-L decline (OR = 0.55, 95% CI: 0.33-0.91) and dietary β-carotene intake was associated with decreased risks of both CERAD W-L and AFT decline (OR = 0.37, 95% CI: 0.21-0.64; OR = 0.58, 95% CI: 0.37-0.91, respectively). Our results suggested that higher dietary α-carotene and β-carotene intake had inverse effects on cognitive function decline among older adults.
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Dorey CK, Gierhart D, Fitch KA, Crandell I, Craft NE. Low Xanthophylls, Retinol, Lycopene, and Tocopherols in Grey and White Matter of Brains with Alzheimer's Disease. J Alzheimers Dis 2023; 94:1-17. [PMID: 35988225 PMCID: PMC10357197 DOI: 10.3233/jad-220460] [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] [Accepted: 07/14/2022] [Indexed: 11/15/2022]
Abstract
BACKGROUND Oxidative stress contributes to pathogenesis and progression of Alzheimer's disease (AD). Higher levels of the dietary antioxidants- carotenoids and tocopherols- are associated with better cognitive functions and lower risk for AD, and lower levels of multiple carotenoids are found in serum and plasma of patients with AD. Although brains donated by individuals with mild cognitive impairment had significantly lower levels of lutein and beta-carotene, previous investigators found no significant difference in carotenoid levels of brains with AD and cognitively normal brains. OBJECTIVE This study tested the hypothesis that micronutrients are significantly lower in donor brains with AD than in healthy elderly brains. METHODS Samples of donor brains with confirmed AD or verified health were dissected into grey and white matter, extracted with organic solvents and analyzed by HPLC. RESULTS AD brains had significantly lower levels of lutein, zeaxanthin, anhydrolutein, retinol, lycopene, and alpha-tocopherol, and significantly increased levels of XMiAD, an unidentified xanthophyll metabolite. No meso-zeaxanthin was detected. The overlapping protective roles of xanthophylls, carotenes, α- and γ-tocopherol are discussed. CONCLUSION Brains with AD had substantially lower concentrations of some, but not all, xanthophylls, carotenes, and tocopherols, and several-fold higher concentrations of an unidentified xanthophyll metabolite increased in AD (XMiAD).
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Affiliation(s)
| | | | - Karlotta A. Fitch
- Alzheimer’s Disease Research Center, Massachusetts General Hospital Boston, MA, USA
| | - Ian Crandell
- Center for Biostatistics and Health Data Science, Virginia Tech, Roanoke, VA, USA
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Low Serum Vitamin D Status Is Associated with Incident Alzheimer's Dementia in the Oldest Old. Nutrients 2022; 15:nu15010061. [PMID: 36615719 PMCID: PMC9824107 DOI: 10.3390/nu15010061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 12/14/2022] [Accepted: 12/16/2022] [Indexed: 12/24/2022] Open
Abstract
Background. Vitamins A, D and E and beta-carotene may have a protective function for cognitive health, due to their antioxidant capacities. Methods. We analyzed data from 1334 non-demented participants (mean age 84 years) from the AgeCoDe study, a prospective multicenter-cohort of elderly general-practitioner patients in Germany, of whom n = 250 developed all-cause dementia and n = 209 developed Alzheimer’s dementia (AD) during 7 years of follow-up. We examined whether concentrations of vitamins A (retinol), D (25-hydroxycholecalciferol) and E (alpha-tocopherol) and beta-carotene, would be associated with incident (AD) dementia. Results. In our sample, 33.7% had optimum vitamin D concentrations (≥50 nmol/L). Higher concentrations of vitamin D were associated with lower incidence of all-cause dementia and AD (HR 0.99 (95%CI 0.98; 0.99); HR0.99 (95%CI 0.98; 0.99), respectively). In particular, subjects with vitamin D deficiency (25.3%, <25 nmol/L) were at increased risk for all-cause dementia and AD (HR1.91 (95%CI 1.30; 2.81); HR2.28 (95%CI 1.47; 3.53), respectively). Vitamins A and E and beta-carotene were unrelated to (AD) dementia. Conclusions. Vitamin D deficiency increased the risk to develop (AD) dementia. Our study supports the advice for monitoring vitamin D status in the elderly and vitamin D supplementation in those with vitamin D deficiency. We observed no relationships between the other vitamins with incident (AD) dementia, which is in line with previous observational studies.
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Investigation of the protective effects of lutein on memory and learning using behavioral methods in a male rat model of Alzheimer's disease. J Funct Foods 2022. [DOI: 10.1016/j.jff.2022.105319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Cannavale CN, Keye SA, Rosok L, Martell S, Holthaus TA, Reeser G, Raine LB, Mullen SP, Cohen NJ, Hillman CH, Hammond BR, Renzi-Hammond L, Khan NA. Enhancing children's cognitive function and achievement through carotenoid consumption: The Integrated Childhood Ocular Nutrition Study (iCONS) protocol. Contemp Clin Trials 2022; 122:106964. [PMID: 36252934 PMCID: PMC10150405 DOI: 10.1016/j.cct.2022.106964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 10/05/2022] [Accepted: 10/11/2022] [Indexed: 01/27/2023]
Abstract
Lutein and zeaxanthin (L + Z) are carotenoids that accumulate in neural tissue and potentially confer benefits to cognition. Whereas cross-sectional studies have revealed positive associations between macular carotenoids (MC) and cognition, no studies have investigated whether L + Z supplementation impacts MC and cognition in childhood. Accordingly, the Integrated Childhood Ocular Nutrition Study aims to investigate the impact of L + Z supplementation over 9-months on academic abilities, attentional control, memory, and MC among preadolescent children. Children 8-10 years (N = 288) will enroll in a 9-month double-blind, placebo-controlled, randomized trial. The study is registered and approved as a clinical trial on the U.S. National Library of Medicine http://ClinicalTrials.gov registry (NCT05177679). Participants will be randomized into an active (10 mg lutein+2 mg zeaxanthin) or waitlist placebo-controlled group. Primary outcomes include hippocampal-dependent memory, attentional inhibition, and academic achievement using a spatial reconstruction task, an Eriksen flanker task, and the Kaufman Test of Academic and Educational Achievement 3rd edition, respectively. Secondary outcomes include event-related brain potentials of attentional resource allocation and information processing speed (i.e., P3/P300 amplitude and latency) recorded during the flanker task. Macular pigment optical density (MPOD) will be assessed using heterochromatic flicker photometry. Cognitive assessments will be completed prior to and after completion of the supplementation period. MPOD will be quantified prior to, at the mid-point of (4-5 months), and after (9 months) the supplementation period. It is hypothesized that L + Z supplementation will improve cognition and academic achievement. Further, benefits for cognition and achievement are anticipated to be mediated by increases in MC among treatment group participants.
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Affiliation(s)
- Corinne N Cannavale
- Department of Kinesiology and Community Health, University of Illinois Urbana-Champaign, Urbana, IL, United States of America
| | - Shelby A Keye
- Department of Kinesiology and Community Health, University of Illinois Urbana-Champaign, Urbana, IL, United States of America
| | - Laura Rosok
- Neuroscience Program, University of Illinois Urbana-Champaign, Urbana, IL, United States of America
| | - Shelby Martell
- Neuroscience Program, University of Illinois Urbana-Champaign, Urbana, IL, United States of America
| | - Tori A Holthaus
- Division of Nutritional Sciences, University of Illinois Urbana-Champaign, Urbana, IL, United States of America
| | - Ginger Reeser
- Department of Kinesiology and Community Health, University of Illinois Urbana-Champaign, Urbana, IL, United States of America
| | - Lauren B Raine
- Department of Physical Therapy, Movement, and Rehabilitation Sciences, Northeastern University, Boston, MA, United States of America
| | - Sean P Mullen
- Department of Kinesiology and Community Health, University of Illinois Urbana-Champaign, Urbana, IL, United States of America; Beckman Institute for the Advancement of Science and Technology, University of Illinois Urbana-Champaign, Urbana, IL, United States of America; Illinois Informatics Institute, University of Illinois Urbana-Champaign, Urbana, IL, United States of America; Center for Social and Behavioral Science, University of Illinois Urbana-Champaign, Urbana, IL, United States of America
| | - Neal J Cohen
- Neuroscience Program, University of Illinois Urbana-Champaign, Urbana, IL, United States of America; Department of Psychology, University of Illinois Urbana-Champaign, Urbana, IL, United States of America; Interdisciplinary Health Sciences Institute, University of Illinois Urbana-Champaign, Urbana, IL, United States of America
| | - Charles H Hillman
- Department of Psychology, Northeastern University, Boston, MA, United States of America; Department of Physical Therapy, Movement, and Rehabilitation Sciences, Northeastern University, Boston, MA, United States of America
| | - Billy R Hammond
- Department of Psychology, University of Georgia, Athens, GA, United States of America
| | - Lisa Renzi-Hammond
- Department of Psychology, University of Georgia, Athens, GA, United States of America; College of Public Health, University of Georgia, Athens, GA, United States of America
| | - Naiman A Khan
- Department of Kinesiology and Community Health, University of Illinois Urbana-Champaign, Urbana, IL, United States of America; Neuroscience Program, University of Illinois Urbana-Champaign, Urbana, IL, United States of America; Division of Nutritional Sciences, University of Illinois Urbana-Champaign, Urbana, IL, United States of America; Beckman Institute for the Advancement of Science and Technology, University of Illinois Urbana-Champaign, Urbana, IL, United States of America.
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Miranda-Dominguez O, Ramirez JSB, Mitchell AJ, Perrone A, Earl E, Carpenter S, Feczko E, Graham A, Jeon S, Cohen NJ, Renner L, Neuringer M, Kuchan MJ, Erdman JW, Fair D. Carotenoids improve the development of cerebral cortical networks in formula-fed infant macaques. Sci Rep 2022; 12:15220. [PMID: 36076053 PMCID: PMC9458723 DOI: 10.1038/s41598-022-19279-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 08/26/2022] [Indexed: 11/25/2022] Open
Abstract
Nutrition during the first years of life has a significant impact on brain development. This study characterized differences in brain maturation from birth to 6 months of life in infant macaques fed formulas differing in content of lutein, β-carotene, and other carotenoids using Magnetic Resonance Imaging to measure functional connectivity. We observed differences in functional connectivity based on the interaction of diet, age and brain networks. Post hoc analysis revealed significant diet-specific differences between insular-opercular and somatomotor networks at 2 months of age, dorsal attention and somatomotor at 4 months of age, and within somatomotor and between somatomotor-visual and auditory-dorsal attention networks at 6 months of age. Overall, we found a larger divergence in connectivity from the breastfeeding group in infant macaques fed formula containing no supplemental carotenoids in comparison to those fed formula supplemented with carotenoids. These findings suggest that carotenoid formula supplementation influences functional brain development.
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Affiliation(s)
- Oscar Miranda-Dominguez
- Department of Pediatrics, University of Minnesota, Minneapolis, MN, 55414, USA.
- Masonic Institute for the Developing Brain, University of Minnesota, Minneapolis, MN, 55414, USA.
| | - Julian S B Ramirez
- Center for the Developing Brain, Child Mind Institute, New York, NY, 10022, USA
| | - A J Mitchell
- Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, OR, 97239, USA
- Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, 97006, USA
| | - Anders Perrone
- Department of Pediatrics, University of Minnesota, Minneapolis, MN, 55414, USA
- Masonic Institute for the Developing Brain, University of Minnesota, Minneapolis, MN, 55414, USA
| | - Eric Earl
- Data Science & Sharing Team, National Institute of Mental Health, Bethesda, MD, 20892, USA
| | - Sam Carpenter
- Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, OR, 97239, USA
| | - Eric Feczko
- Department of Pediatrics, University of Minnesota, Minneapolis, MN, 55414, USA
- Masonic Institute for the Developing Brain, University of Minnesota, Minneapolis, MN, 55414, USA
| | - Alice Graham
- Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, OR, 97239, USA
| | - Sookyoung Jeon
- Division of Nutritional Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
- Department of Food Science & Nutrition and the Korean Institute of Nutrition, Hallym University, Chuncheon, Gangwon-Do, Republic of Korea
| | - Neal J Cohen
- Department of Psychology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Laurie Renner
- Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, 97006, USA
| | - Martha Neuringer
- Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, 97006, USA
| | | | - John W Erdman
- Division of Nutritional Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Damien Fair
- Department of Pediatrics, University of Minnesota, Minneapolis, MN, 55414, USA
- Masonic Institute for the Developing Brain, University of Minnesota, Minneapolis, MN, 55414, USA
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Mahmassani HA, Switkowski KM, Johnson EJ, Scott TM, Rifas-Shiman SL, Oken E, Jacques PF. Early Childhood Lutein and Zeaxanthin Intake Is Positively Associated with Early Childhood Receptive Vocabulary and Mid-Childhood Executive Function But No Other Cognitive or Behavioral Outcomes in Project Viva. J Nutr 2022; 152:2555-2564. [PMID: 36774121 PMCID: PMC9644167 DOI: 10.1093/jn/nxac188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 07/19/2022] [Accepted: 08/22/2022] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Lutein and zeaxanthin are carotenoids associated with better cognition in older adults. Recent evidence suggests that their dietary intake may also have cognitive implications in childhood. OBJECTIVE The aim was to examine associations of early childhood lutein and zeaxanthin (L/Z) intake with cognition in early and mid-childhood. METHODS Among 1378 children in Project Viva, a prospective cohort, mothers reported their child's dietary intake in early childhood (median: 3.2 y) using a food-frequency questionnaire. Child cognition and behavior were assessed at the same time point using the Peabody Picture Vocabulary Test (PPVT-III) and the Wide Range Assessment of Visual Motor Abilities (WRAVMA) and at mid-childhood (median: 7.7 y) using the Kaufman Brief Intelligence Test, the WRAVMA drawing subtest, the Wide Range Assessment of Memory and Learning, the Behavior Rating Inventory of Executive Function (BRIEF), and the Strengths and Difficulties Questionnaire. RESULTS Children consumed a daily mean (SD) of 1.0 (0.4) mg L/Z in early childhood. Children in the third-quartile category of L/Z intake had a mean PPVT-III score 2.40 (95% CI: 0.27, 4.53) points higher than children in the lowest quartile category in early childhood, suggesting better receptive vocabulary. Children in the highest quartile category of L/Z intake had a parent-reported mean BRIEF Global Executive Composite score 1.65 (95% CI: -3.27, -0.03) points lower than children in the lowest quartile category in mid-childhood, indicating better executive function. We did not observe associations between L/Z intake and any of the other cognitive or behavioral outcomes assessed. CONCLUSIONS The overall findings do not provide strong evidence of an association between child L/Z intake and cognition and behavior. However, the positive associations found between early childhood L/Z intake and early childhood receptive vocabulary and mid-childhood executive function, in addition to previous evidence of neurodevelopmental benefit of L/Z intake, suggest that this relation deserves further investigation.
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Affiliation(s)
- Hiya A Mahmassani
- Dorothy J and Gerald R Friedman School of Nutrition and Science Policy at Tufts University, Boston, MA, USA,Jean Mayer–USDA Human Nutrition Research Center on Aging at Tufts University, Boston, MA, USA
| | - Karen M Switkowski
- Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, MA, USA
| | - Elizabeth J Johnson
- Dorothy J and Gerald R Friedman School of Nutrition and Science Policy at Tufts University, Boston, MA, USA
| | - Tammy M Scott
- Dorothy J and Gerald R Friedman School of Nutrition and Science Policy at Tufts University, Boston, MA, USA
| | - Sheryl L Rifas-Shiman
- Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, MA, USA
| | - Emily Oken
- Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, MA, USA,Department of Nutrition, Harvard TH Chan School of Public Health, Boston, MA, USA
| | - Paul F Jacques
- Dorothy J and Gerald R Friedman School of Nutrition and Science Policy at Tufts University, Boston, MA, USA; Jean Mayer-USDA Human Nutrition Research Center on Aging at Tufts University, Boston, MA, USA.
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Marino A, Battaglini M, Moles N, Ciofani G. Natural Antioxidant Compounds as Potential Pharmaceutical Tools against Neurodegenerative Diseases. ACS OMEGA 2022; 7:25974-25990. [PMID: 35936442 PMCID: PMC9352343 DOI: 10.1021/acsomega.2c03291] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Accepted: 06/29/2022] [Indexed: 06/01/2023]
Abstract
Natural antioxidants are a very large diversified family of molecules classified by activity (enzymatic or nonenzymatic), chemical-physical properties (e.g., hydrophilic or lipophilic), and chemical structure (e.g., vitamins, polyphenols, etc.). Research on natural antioxidants in various fields, such as pharmaceutics, nutraceutics, and cosmetics, is among the biggest challenges for industry and science. From a biomedical point of view, the scavenging activity of reactive oxygen species (ROS) makes them a potential tool for the treatment of neurodegenerative diseases including Alzheimer's disease, Parkinson's disease, Huntington's disease, dementia, and amyotrophic lateral sclerosis (ALS). In addition to the purified phytochemical compounds, a variety of natural extracts characterized by a complex mixture of antioxidants and anti-inflammatory molecules have been successfully exploited to rescue preclinical models of these diseases. Extracts derived from Ginkgo biloba, grape, oregano, curcumin, tea, and ginseng show multitherapeutic effects by synergically acting on different biochemical pathways. Furthermore, the reduced toxicity associated with many of these compounds limits the occurrence of side effects. The support of nanotechnology for improving brain delivery, controlling release, and preventing rapid degradation and excretion of these compounds is of fundamental importance. This review reports on the most promising results obtained on in vitro systems, in vivo models, and in clinical trials, by exploiting natural-derived antioxidant compounds and extracts, in their free form or encapsulated in nanocarriers.
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Affiliation(s)
- Attilio Marino
- Istituto
Italiano di Tecnologia, Smart Bio-Interfaces, Viale Rinaldo Piaggio 34, 56025 Pontedera, Italy
| | - Matteo Battaglini
- Istituto
Italiano di Tecnologia, Smart Bio-Interfaces, Viale Rinaldo Piaggio 34, 56025 Pontedera, Italy
| | - Nadia Moles
- Istituto
Italiano di Tecnologia, Smart Bio-Interfaces, Viale Rinaldo Piaggio 34, 56025 Pontedera, Italy
- Politecnico
di Torino, Department of Mechanical
and Aerospace Engineering, Corso Duca degli Abruzzi 24, 10129 Torino, Italy
| | - Gianni Ciofani
- Istituto
Italiano di Tecnologia, Smart Bio-Interfaces, Viale Rinaldo Piaggio 34, 56025 Pontedera, Italy
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Effect of macular pigment carotenoids on cognitive functions: A systematic review. Physiol Behav 2022; 254:113891. [PMID: 35752349 DOI: 10.1016/j.physbeh.2022.113891] [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: 03/15/2022] [Revised: 06/18/2022] [Accepted: 06/20/2022] [Indexed: 11/30/2022]
Abstract
Lutein and zeaxanthin-xanthophyll carotenoids with antioxidant and anti-inflammatory characteristics-are present in the retina and the brain. High concentrations of these carotenoids have been positively related to cognitive performance. Therefore, this systematic review analyses the relationship between macular pigment density and cognitive functions. Most relevant databases were scoured for studies on healthy people relating cognitive functions to macular pigment optical density (MPOD). There were no age, sex, or race limitations. PROSPERO registration: CRD42021254833. Nineteen studies were included, seven randomized controlled trials (RCT) and eleven observational studies. The general aim of the studies was to examine the association between carotenoids (lutein, meso‑zeaxanthin and zeaxanthin) and cognitive function. Most observational studies correlates MPOD levels with cognitive function or brain activity. Besides, RCTs compared the cognitive function and/or brain activity after increasing lutein and zeaxanthin intake though dietary supplementation or avocado consumption. Dietary lutein and zeaxanthin intake increased MPOD in six of the seven clinical trials and significantly improved most of the cognitive functions studied. A wide variety of test and methodologies for measuring cognitive functions were observed. Memory, processing speed, attention and reasoning were the cognitive function significantly related to MPOD levels in adults. Brain activity also was related to MPOD, but the results were inconsistent. Only four of the eleven observational studies were based on young people and all studies showed a significant relationship between MPOD and cognitive functions. This systematic review showed a direct relationship among cognitive functions, macular pigment and the intake of lutein and zeaxanthin.
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From Foods to Chemotherapeutics: The Antioxidant Potential of Dietary Phytochemicals. Processes (Basel) 2022. [DOI: 10.3390/pr10061222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Food plants have been recognized for their medicinal properties for millennia, a concept supported by epidemiological studies indicating long-term health benefits for people consuming greater amounts of fruits and vegetables. As our technology and instrumentation advance, researchers have the ability to identify promising phytochemicals, and examine their potential benefits, or detriments, to human health. While results from trials investigating single chemical supplementation have sometimes produced negative health results, studies investigating the synergistic action of phytochemicals—either within our diet or as an adjuvant to radiation or chemotherapy—appear promising. Utilizing phytochemicals as synergistic agents may lower the chemotherapeutic doses needed to incur physiological results, while also using chemicals with fewer toxic effects. This review investigates a variety of plant-produced chemicals humans typically ingest, their impacts on overall health patterns, molecular mechanisms associated with their health impacts, and the potential of their synergistic use for therapeutic purposes.
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Biological Potential, Gastrointestinal Digestion, Absorption, and Bioavailability of Algae-Derived Compounds with Neuroprotective Activity: A Comprehensive Review. Mar Drugs 2022; 20:md20060362. [PMID: 35736165 PMCID: PMC9227170 DOI: 10.3390/md20060362] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 05/23/2022] [Accepted: 05/24/2022] [Indexed: 12/04/2022] Open
Abstract
Currently, there is no known cure for neurodegenerative disease. However, the available therapies aim to manage some of the symptoms of the disease. Human neurodegenerative diseases are a heterogeneous group of illnesses characterized by progressive loss of neuronal cells and nervous system dysfunction related to several mechanisms such as protein aggregation, neuroinflammation, oxidative stress, and neurotransmission dysfunction. Neuroprotective compounds are essential in the prevention and management of neurodegenerative diseases. This review will focus on the neurodegeneration mechanisms and the compounds (proteins, polyunsaturated fatty acids (PUFAs), polysaccharides, carotenoids, phycobiliproteins, phenolic compounds, among others) present in seaweeds that have shown in vivo and in vitro neuroprotective activity. Additionally, it will cover the recent findings on the neuroprotective effects of bioactive compounds from macroalgae, with a focus on their biological potential and possible mechanism of action, including microbiota modulation. Furthermore, gastrointestinal digestion, absorption, and bioavailability will be discussed. Moreover, the clinical trials using seaweed-based drugs or extracts to treat neurodegenerative disorders will be presented, showing the real potential and limitations that a specific metabolite or extract may have as a new therapeutic agent considering the recent approval of a seaweed-based drug to treat Alzheimer’s disease.
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Beydoun MA, Beydoun HA, Fanelli-Kuczmarski MT, Weiss J, Hossain S, Canas JA, Evans MK, Zonderman AB. Association of Serum Antioxidant Vitamins and Carotenoids With Incident Alzheimer Disease and All-Cause Dementia Among US Adults. Neurology 2022; 98:e2150-e2162. [PMID: 35508396 PMCID: PMC9169941 DOI: 10.1212/wnl.0000000000200289] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 02/10/2022] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND AND OBJECTIVES Serum antioxidant vitamins and carotenoids may protect against neurodegeneration with age. We examined associations of these nutritional biomarkers with incident all-cause and Alzheimer disease (AD) dementia among US middle-aged and older adults. METHODS Using data from the third National Health and Nutrition Examination Surveys (1988-1994), linked with Centers for Medicare & Medicaid follow-up data, we tested associations and interactions of serum vitamins A, C, and E and total and individual serum carotenoids and interactions with incident AD and all-cause dementia. Cox proportional hazards regression models were conducted. RESULTS After ≤26 years follow-up (mean 16-17 years, 7,283 participants aged 45-90 years at baseline), serum lutein+zeaxanthin was associated with reduced risk of all-cause dementia (65+ age group), even in the lifestyle-adjusted model (per SD: hazard ratio [HR] 0.93, 95% CI 0.87-0.99; p = 0.037), but attenuated in comparison with a socioeconomic status (SES)-adjusted model (HR 0.92, 95% CI 0.86-0.93; p = 0.013). An inverse relationship was detected between serum β-cryptoxanthin (per SD increase) and all-cause dementia (45+ and 65+) for age- and sex-adjusted models (HR 0.86, 95% CI 0.80-0.93; p < 0.001 for 45+; HR 0.86, 95% CI 0.80-0.93; p = 0.001 for 65+), a relationship remaining strong in SES-adjusted models (HR 0.89, 95% CI 0.82-0.96; p = 0.006 for 45+; HR 0.88, 95% CI 0.81-0.96; p = 0.007 for 65+), but attenuated in subsequent models. Antagonistic interactions indicate putative protective effects of 1 carotenoid may be observed at lower levels other carotenoids or antioxidant vitamin. DISCUSSION Incident all-cause dementia was inversely associated with serum lutein+zeaxanthin and β-cryptoxanthin levels. Further studies with time-dependent exposures and randomized trials are needed to test neuroprotective effects of supplementing the diet with select carotenoids. CLASSIFICATION OF EVIDENCE This study provides Class II evidence that incident all-cause dementia was inversely associated with serum lutein+zeaxanthin and β-cryptoxanthin levels.
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Affiliation(s)
- May A Beydoun
- From the Laboratory of Epidemiology and Population Sciences (M.A.B., S.H., M.K.E., A.B.Z.), National Institute on Aging, Intramural Research Program, NIA/NIH/IRP, Baltimore, MD; Department of Research Programs (H.A.B.), Fort Belvoir Community Hospital, VA; Department of Behavioral Health and Nutrition (M.T.F.-K.), University of Delaware, Newark; Department of Demography (J.W.), University of California, Berkeley; and Department of Pediatrics (J.A.C.), Johns Hopkins Medical Institutions, St. Petersburgh, FL
| | - Hind A Beydoun
- From the Laboratory of Epidemiology and Population Sciences (M.A.B., S.H., M.K.E., A.B.Z.), National Institute on Aging, Intramural Research Program, NIA/NIH/IRP, Baltimore, MD; Department of Research Programs (H.A.B.), Fort Belvoir Community Hospital, VA; Department of Behavioral Health and Nutrition (M.T.F.-K.), University of Delaware, Newark; Department of Demography (J.W.), University of California, Berkeley; and Department of Pediatrics (J.A.C.), Johns Hopkins Medical Institutions, St. Petersburgh, FL
| | - Marie T Fanelli-Kuczmarski
- From the Laboratory of Epidemiology and Population Sciences (M.A.B., S.H., M.K.E., A.B.Z.), National Institute on Aging, Intramural Research Program, NIA/NIH/IRP, Baltimore, MD; Department of Research Programs (H.A.B.), Fort Belvoir Community Hospital, VA; Department of Behavioral Health and Nutrition (M.T.F.-K.), University of Delaware, Newark; Department of Demography (J.W.), University of California, Berkeley; and Department of Pediatrics (J.A.C.), Johns Hopkins Medical Institutions, St. Petersburgh, FL
| | - Jordan Weiss
- From the Laboratory of Epidemiology and Population Sciences (M.A.B., S.H., M.K.E., A.B.Z.), National Institute on Aging, Intramural Research Program, NIA/NIH/IRP, Baltimore, MD; Department of Research Programs (H.A.B.), Fort Belvoir Community Hospital, VA; Department of Behavioral Health and Nutrition (M.T.F.-K.), University of Delaware, Newark; Department of Demography (J.W.), University of California, Berkeley; and Department of Pediatrics (J.A.C.), Johns Hopkins Medical Institutions, St. Petersburgh, FL
| | - Sharmin Hossain
- From the Laboratory of Epidemiology and Population Sciences (M.A.B., S.H., M.K.E., A.B.Z.), National Institute on Aging, Intramural Research Program, NIA/NIH/IRP, Baltimore, MD; Department of Research Programs (H.A.B.), Fort Belvoir Community Hospital, VA; Department of Behavioral Health and Nutrition (M.T.F.-K.), University of Delaware, Newark; Department of Demography (J.W.), University of California, Berkeley; and Department of Pediatrics (J.A.C.), Johns Hopkins Medical Institutions, St. Petersburgh, FL
| | - Jose Atilio Canas
- From the Laboratory of Epidemiology and Population Sciences (M.A.B., S.H., M.K.E., A.B.Z.), National Institute on Aging, Intramural Research Program, NIA/NIH/IRP, Baltimore, MD; Department of Research Programs (H.A.B.), Fort Belvoir Community Hospital, VA; Department of Behavioral Health and Nutrition (M.T.F.-K.), University of Delaware, Newark; Department of Demography (J.W.), University of California, Berkeley; and Department of Pediatrics (J.A.C.), Johns Hopkins Medical Institutions, St. Petersburgh, FL
| | - Michele Kim Evans
- From the Laboratory of Epidemiology and Population Sciences (M.A.B., S.H., M.K.E., A.B.Z.), National Institute on Aging, Intramural Research Program, NIA/NIH/IRP, Baltimore, MD; Department of Research Programs (H.A.B.), Fort Belvoir Community Hospital, VA; Department of Behavioral Health and Nutrition (M.T.F.-K.), University of Delaware, Newark; Department of Demography (J.W.), University of California, Berkeley; and Department of Pediatrics (J.A.C.), Johns Hopkins Medical Institutions, St. Petersburgh, FL
| | - Alan B Zonderman
- From the Laboratory of Epidemiology and Population Sciences (M.A.B., S.H., M.K.E., A.B.Z.), National Institute on Aging, Intramural Research Program, NIA/NIH/IRP, Baltimore, MD; Department of Research Programs (H.A.B.), Fort Belvoir Community Hospital, VA; Department of Behavioral Health and Nutrition (M.T.F.-K.), University of Delaware, Newark; Department of Demography (J.W.), University of California, Berkeley; and Department of Pediatrics (J.A.C.), Johns Hopkins Medical Institutions, St. Petersburgh, FL
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Wang H, Wang G, Billings R, Li D, Haase SR, Wheeler PF, Vance DE, Li W. Can Diet Supplements of Macular Pigment of Lutein, Zeaxanthin, and Meso-zeaxanthin Affect Cognition? J Alzheimers Dis 2022; 87:1079-1087. [DOI: 10.3233/jad-215736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Background: Lutein (L), zeaxanthin (Z), and meso-zeaxanthin (MZ) are collectively called macular pigment. MZ can be converted from L in the macula. In the recent decade, many studies have been performed to investigate the effects for taking carotenoids, especially L and Z or L, Z, and MZ, as diet supplements on human health. Objective: We examined if diet supplements of L + Z or L + Z + MZ have effects on cognitive function in adults. Methods: A systemic literature search was performed in March 2021 with the following keywords: lutein, zeaxanthin, meso-zeaxanthin, cognition, cognitive, and macular pigment. The searched databases included Medline EBSCOhost, Scopus, Elsevier, Cochrane Library, ProQuest, and ClinicalTrials.gov. Findings from eight clinical trials were presented as the strongest evidence on the studied topic. Results: Most studies have found that macular pigments (L + Z) in blood or macula are positively correlated with cognitive performance. As an index of the amount of macular pigments in the brain, macular pigment optical density is related to cognitive performance in adults. In addition, there is an inverse relationship between a higher amount of macular pigment in the blood and lower risk of mild cognitive impairments or Alzheimer’s disease. Based on the findings from the clinical trials, diet supplements of L + Z or L + Z + MZ are associated with improved cognition in adults. Conclusion: The diet supplements of L + Z or L + Z+MZ are associated with better cognitive functioning, which may be via their beneficial effects on the vision.
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Affiliation(s)
- Hongwei Wang
- Department of Physiology, Henan Chinese Medicine University, Zhengzhou, China
| | - Ge Wang
- Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Rebecca Billings
- UAB Libraries, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Daniel Li
- University of California at Los Angeles, Los Angeles, CA, USA
| | - Shakaye R. Haase
- Department of Psychology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Pariya F. Wheeler
- Department of Psychology, University of Alabama at Birmingham, Birmingham, AL, USA
- School of Nursing, University of Alabama at Birmingham, Birmingham, AL, USA
| | - David E. Vance
- Department of Psychology, University of Alabama at Birmingham, Birmingham, AL, USA
- School of Nursing, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Wei Li
- School of Health Professions, University of Alabama at Birmingham, Birmingham, AL, USA
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Evaluation of Phenolic Compounds and Pigments in Freshwater Cladophora glomerata Biomass from Various Lithuanian Rivers as a Potential Future Raw Material for Biotechnology. WATER 2022. [DOI: 10.3390/w14071138] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Freshwater macroalgae produces a wide range of bioactive compounds, and interest in utilizing its biomass is growing rapidly. Meanwhile, exploiting renewable sources for biomass collection could lead to more sustainable biotechnological chains. The aim of this study was to investigate Cladophora glomerata biomass from Lithuanian rivers as a potential raw material for biotechnology. For this reason, phenolic compound profiles, antioxidant activity and pigment concentrations were determined in macroalgal biomass samples collected from the following four Lithuanian rivers: Dubysa (B1), Šventoji (B2), Nevėžis (B3) and Jūra (B4). The highest total phenolic compound content was determined in B3 (1.32 mg GAE/g). Three phenolic acids were identified, namely gallic (12.94–35.13 µg/g), p-hydroxybenzoic (23.97–29.05 µg/g) and p-coumaric (1.79–6.46 µg/g). The results indicate significant C. glomerata antioxidant activity; the highest reducing power reached 0.737 AU (B3), the total antioxidant content was 1.47 mg Trolox/g (B3), DPPH and ABTS radical scavenging was 11.09% (B3) and 97.86% (B1) and FRAP activity 20.86 µmol/L (B3). The content of pigments ranged from 0.56-0.74, 0.39–0.57, 0.17–0.23 to 0.11–0.17 mg/g in chlorophyll a, b, carotenoids, and lutein, respectively. To conclude, C. glomerata macroalgal biomass may have the potential to act as a functional raw material, as several groups of bioactive compounds and antioxidant activities were observed.
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Lopresti AL, Smith SJ, Drummond PD. The Effects of Lutein and Zeaxanthin Supplementation on Cognitive Function in Adults With Self-Reported Mild Cognitive Complaints: A Randomized, Double-Blind, Placebo-Controlled Study. Front Nutr 2022; 9:843512. [PMID: 35252311 PMCID: PMC8891800 DOI: 10.3389/fnut.2022.843512] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Accepted: 01/25/2022] [Indexed: 11/13/2022] Open
Abstract
Background Lutein and zeaxanthin are fat-soluble, dietary carotenoids with high concentrations in human brain tissue. There have been a number studies confirming an association between lutein and zeaxanthin and cognitive function. Purpose Examine the effects of lutein and zeaxanthin supplementation on cognitive function in adults with self-reported cognitive complaints. Study Design Two-arm, parallel-group, 6-month, randomized, double-blind, placebo-controlled trial. Methods Ninety volunteers aged 40–75 years received either 10 mg of lutein and 2 mg of zeaxanthin, once daily or a placebo. Outcome measures included computer-based cognitive tasks, the Cognitive Failures Questionnaire, Behavior Rating Inventory of Executive Function, Profile of Mood States, and the Patient-Reported Outcomes Measurement Information System-29. Results Compared to the placebo, lutein and zeaxanthin supplementation was associated with greater improvements in visual episodic memory (p = 0.005) and visual learning (p = 0.001). However, there were no other statistically-significant differences in performance on the other assessed cognitive tests or self-report questionnaires. Lutein and zeaxanthin supplementation was well-tolerated with no reports of significant adverse effects. Conclusion The results from this trial suggest that 6-months of supplementation with lutein and zeaxanthin may improve visual memory and learning in community-dwelling adults with self-reported cognitive complaints. However, it had no other effect on other computer-based measures of cognitive performance or self-report measures of cognition, memory, mood, or physical function.
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Affiliation(s)
- Adrian L. Lopresti
- Clinical Research Australia, Perth, WA, Australia
- Healthy Ageing Research Centre and Discipline of Psychology, College of Science, Health, Engineering and Education, Murdoch University, Perth, WA, Australia
- *Correspondence: Adrian L. Lopresti
| | - Stephen J. Smith
- Clinical Research Australia, Perth, WA, Australia
- Healthy Ageing Research Centre and Discipline of Psychology, College of Science, Health, Engineering and Education, Murdoch University, Perth, WA, Australia
| | - Peter D. Drummond
- Healthy Ageing Research Centre and Discipline of Psychology, College of Science, Health, Engineering and Education, Murdoch University, Perth, WA, Australia
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Chen C, Lu Z, Zhang D, Li S. The Mediation Role of the Risk of Non-Alcoholic Fatty Liver Disease in Relationship between Lutein and Zeaxanthin and Cognitive Functions among Older Adults in the United States. Nutrients 2022; 14:nu14030578. [PMID: 35276937 PMCID: PMC8840044 DOI: 10.3390/nu14030578] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2021] [Revised: 01/25/2022] [Accepted: 01/26/2022] [Indexed: 11/23/2022] Open
Abstract
Background: Previous studies showed lutein and zeaxanthin (L and Z) may influence cognitive function by different mechanisms. Our study aimed to be the first to examine whether the risk of non-alcoholic fatty liver disease (NAFLD) mediated the possible association between the dietary intake of L and Z and cognitive function. Methods: We conducted a cross-sectional analysis of participants aged 60 years or over in the National Health and Nutrition Examination Survey (NHANES) 2011–2014. Multivariable linear regression was used to investigate the association between the dietary intake of L and Z and cognitive function, and structural equation modeling tested the mediation effect. Results: The fatty liver index for the United States population (US FLI) acted as a mediator in the association between the higher intake of L and Z and the Animal Fluency Test, the Digit Symbol Substitution Test (DSST), and composite score and mediated 13.89%, 17.87%, and 13.79% of the total association in dietary L and Z intake (14.29%, 13.68%, and 10.34% of the total association in total L and Z intake), respectively. Conclusion: Our study indicated the potential role of the risk of NAFLD as a mediator of associations between the dietary intake of L and Z and cognitive function in the geriatric American population.
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Affiliation(s)
| | | | | | - Suyun Li
- Correspondence: ; Tel.: +86-0532-8299-1712
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López GD, Álvarez-Rivera G, Carazzone C, Ibáñez E, Leidy C, Cifuentes A. Bacterial Carotenoids: Extraction, Characterization, and Applications. Crit Rev Anal Chem 2021; 53:1239-1262. [PMID: 34915787 DOI: 10.1080/10408347.2021.2016366] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
Natural carotenoids are secondary metabolites that exhibit antioxidant, anti-inflammatory, and anti-cancer properties. These types of compounds are highly demanded by pharmaceutical, cosmetic, nutraceutical, and food industries, leading to the search for new natural sources of carotenoids. In recent years, the production of carotenoids from bacteria has become of great interest for industrial applications. In addition to carotenoids with C40-skeletons, some bacteria have the ability to synthesize characteristic carotenoids with C30-skeletons. In this regard, a great variety of methodologies for the extraction and identification of bacterial carotenoids has been reported and this is the first review that condenses most of this information. To understand the diversity of carotenoids from bacteria, we present their biosynthetic origin in order to focus on the methodologies employed in their extraction and characterization. Special emphasis has been made on high-performance liquid chromatography-mass spectrometry (HPLC-MS) for the analysis and identification of bacterial carotenoids. We end up this review showing their potential commercial use. This review is proposed as a guide for the identification of these metabolites, which are frequently reported in new bacteria strains.
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Affiliation(s)
- Gerson-Dirceu López
- Chemistry Department, Laboratory of Advanced Analytical Techniques in Natural Products (LATNAP), Universidad de los Andes, Bogotá, Colombia
- Physics Department, Laboratory of Biophysics, Universidad de los Andes, Bogotá, Colombia
- Laboratory of Foodomics, Institute of Food Science Research (CIAL), CSIC, Madrid, Spain
| | | | - Chiara Carazzone
- Chemistry Department, Laboratory of Advanced Analytical Techniques in Natural Products (LATNAP), Universidad de los Andes, Bogotá, Colombia
| | - Elena Ibáñez
- Laboratory of Foodomics, Institute of Food Science Research (CIAL), CSIC, Madrid, Spain
| | - Chad Leidy
- Physics Department, Laboratory of Biophysics, Universidad de los Andes, Bogotá, Colombia
| | - Alejandro Cifuentes
- Laboratory of Foodomics, Institute of Food Science Research (CIAL), CSIC, Madrid, Spain
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Cheng FW, Ford NA, Taylor MK. US Older Adults That Consume Avocado or Guacamole Have Better Cognition Than Non-consumers: National Health and Nutrition Examination Survey 2011-2014. Front Nutr 2021; 8:746453. [PMID: 34722611 PMCID: PMC8551489 DOI: 10.3389/fnut.2021.746453] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 09/15/2021] [Indexed: 11/13/2022] Open
Abstract
Purpose: The goal of this study is to examine how avocado relates to cognitive function among older adults. Methods: A total of 2,886 National Health and Nutrition Examination Survey 2011-2014 participants aged 60 or older met the eligibility criteria and were included of our cross-sectional study. Participants were binarily classified as avocado consumers (i.e., reported consuming any avocado/guacamole in either 24-h dietary recalls) or non-consumers. Cognitive performance was evaluated with: Consortium to Establish a Registry for Alzheimer's disease (CERAD)-immediate and delayed recall (IWR/DWR), the Animal Fluency test, and the Digit Symbol Substitution Test. We calculated the education-dependent z-scores for each subject because education level can impact cognitive function. Global cognitive score, an average of the z-scores for each cognitive test, was calculated in participants who had completed all four tests. To account for relevant covariates, we tested for mean differences in cognition between consumers and non-consumers using independent sample t-tests and ANCOVA, special cases of ordinary least squares regression. Results: Avocado consumers had significantly better cognitive scores across all cognitive tests and the global cognition score (p < 0.05) in the unadjusted model. Some mean differences attenuated after adjusting for potential confounders, but others remained significant. Compared to non-consumers, avocado consumers had significantly higher z-scores of 0.15, 0.15, and 0.11 for CERAD IWR and DWR, and global cognition score, respectively (all p < 0.05 in adjusted models). Conclusion: Avocado consumption was associated with significantly better IWR, DWR, and the overall global cognition score, which remained significant when controlling for all relevant confounders.
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Affiliation(s)
- Feon W Cheng
- Avocado Nutrition Center, Mission Viejo, CA, United States
| | - Nikki A Ford
- Avocado Nutrition Center, Mission Viejo, CA, United States
| | - Matthew K Taylor
- Medical Center Department of Dietetics and Nutrition, University of Kansas, Kansas City, KS, United States.,Alzheimer's Disease Center, University of Kansas, Fairway, KS, United States
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Makuch K, Hryc J, Markiewicz M, Pasenkiewicz-Gierula M. Lutein and Zeaxanthin in the Lipid Bilayer-Similarities and Differences Revealed by Computational Studies. Front Mol Biosci 2021; 8:768449. [PMID: 34765645 PMCID: PMC8575744 DOI: 10.3389/fmolb.2021.768449] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 10/01/2021] [Indexed: 12/11/2022] Open
Abstract
Lutein and zeaxanthin are two similar carotenoids of the xanthophyll subgroup. Carotenoids are synthesized almost entirely by plants but are also present in significant amounts in animals. They are essential components of the lipid matrix of biomembranes, and one of their functions is to protect cells from light radiation, free radicals and oxidative stress. Carotenoids, depending on their chemical structure, can locate at various positions and in different orientations in the bilayer. Xanthophylls (XAN) are polar and in the bilayer are positionally restricted. In the case of lutein and zeaxanthin, whose both ionone rings are hydroxy-substituted and as such are anchored in the lipid bilayer interfaces, the position is generally transmembrane. However, both experimental and computer modelling studies indicate that lutein can also locate horizontally below the bilayer interface. This location has never been observed for zeaxanthin. To find a molecular-level explanation for the difference in the orientations of the XAN molecules in the bilayer, a number of phosphatidylcholine-XAN bilayers were constructed and molecular dynamics (MD) simulated for 1.1 µs each. The all-trans XAN molecules were initially placed either parallel or perpendicular to the bilayer surface. With the exception of one lutein, the horizontally placed molecules adopted the transmembrane orientation within 100-600 ns. On the basis of detailed analyses of the XAN orientations and the numbers and lifetimes of their interactions in the bilayer, a plausible explanation is offered as to why a lutein molecule may remain in the horizontal orientation while zeaxanthin does not. Contrary to common believe, lutein horizontal orientation is not related to the ε-ring rotation around the C6'-C7' bond.
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Affiliation(s)
| | | | | | - Marta Pasenkiewicz-Gierula
- Department of Computational Biophysics and Bioinformatics, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
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Zafar J, Aqeel A, Shah FI, Ehsan N, Gohar UF, Moga MA, Festila D, Ciurea C, Irimie M, Chicea R. Biochemical and Immunological implications of Lutein and Zeaxanthin. Int J Mol Sci 2021; 22:10910. [PMID: 34681572 PMCID: PMC8535525 DOI: 10.3390/ijms222010910] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Revised: 09/27/2021] [Accepted: 10/03/2021] [Indexed: 12/21/2022] Open
Abstract
Throughout history, nature has been acknowledged for being a primordial source of various bioactive molecules in which human macular carotenoids are gaining significant attention. Among 750 natural carotenoids, lutein, zeaxanthin and their oxidative metabolites are selectively accumulated in the macular region of living beings. Due to their vast applications in food, feed, pharmaceutical and nutraceuticals industries, the global market of lutein and zeaxanthin is continuously expanding but chemical synthesis, extraction and purification of these compounds from their natural repertoire e.g., plants, is somewhat costly and technically challenging. In this regard microbial as well as microalgal carotenoids are considered as an attractive alternative to aforementioned challenges. Through the techniques of genetic engineering and gene-editing tools like CRISPR/Cas9, the overproduction of lutein and zeaxanthin in microorganisms can be achieved but the commercial scale applications of such procedures needs to be done. Moreover, these carotenoids are highly unstable and susceptible to thermal and oxidative degradation. Therefore, esterification of these xanthophylls and microencapsulation with appropriate wall materials can increase their shelf-life and enhance their application in food industry. With their potent antioxidant activities, these carotenoids are emerging as molecules of vital importance in chronic degenerative, malignancies and antiviral diseases. Therefore, more research needs to be done to further expand the applications of lutein and zeaxanthin.
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Affiliation(s)
- Javaria Zafar
- Institute of Industrial Biotechnology, Government College University Lahore, Lahore 54000, Pakistan; (J.Z.); (A.A.); (F.I.S.); (N.E.); (U.F.G.)
| | - Amna Aqeel
- Institute of Industrial Biotechnology, Government College University Lahore, Lahore 54000, Pakistan; (J.Z.); (A.A.); (F.I.S.); (N.E.); (U.F.G.)
| | - Fatima Iftikhar Shah
- Institute of Industrial Biotechnology, Government College University Lahore, Lahore 54000, Pakistan; (J.Z.); (A.A.); (F.I.S.); (N.E.); (U.F.G.)
| | - Naureen Ehsan
- Institute of Industrial Biotechnology, Government College University Lahore, Lahore 54000, Pakistan; (J.Z.); (A.A.); (F.I.S.); (N.E.); (U.F.G.)
| | - Umar Farooq Gohar
- Institute of Industrial Biotechnology, Government College University Lahore, Lahore 54000, Pakistan; (J.Z.); (A.A.); (F.I.S.); (N.E.); (U.F.G.)
| | - Marius Alexandru Moga
- Faculty of Medicine, Transilvania University of Brasov, 500036 Brasov, Romania; (M.A.M.); (M.I.)
| | - Dana Festila
- Radiology and Maxilo Facial Surgery Department, Iuliu Hatieganu University of Medicine and Pharmacy, 400012 Cluj Napoca, Romania
| | - Codrut Ciurea
- Faculty of Medicine, Transilvania University of Brasov, 500036 Brasov, Romania; (M.A.M.); (M.I.)
| | - Marius Irimie
- Faculty of Medicine, Transilvania University of Brasov, 500036 Brasov, Romania; (M.A.M.); (M.I.)
| | - Radu Chicea
- Faculty of Medicine, “Lucian Blaga” University, 550169 Sibiu, Romania;
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Gazzolo D, Picone S, Gaiero A, Bellettato M, Montrone G, Riccobene F, Lista G, Pellegrini G. Early Pediatric Benefit of Lutein for Maturing Eyes and Brain-An Overview. Nutrients 2021; 13:3239. [PMID: 34579116 PMCID: PMC8468336 DOI: 10.3390/nu13093239] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 08/31/2021] [Accepted: 09/02/2021] [Indexed: 01/15/2023] Open
Abstract
Lutein is a dietary carotenoid preferentially accumulated in the eye and the brain in early life and throughout the life span. Lutein accumulation in areas of high metabolism and oxidative stress such as the eye and the brain suggest a unique role of this ingredient during the development and maturation of these organs of common embryological origin. Lutein is naturally provided to the developing baby via the cord blood, breast milk and then infant diet. The presence of this carotenoid depends on fruit and vegetable intakes and its bioavailability is higher in breastmilk. This paper aims to review the anatomical development of the eye and the brain, explore the presence and selective deposition of lutein in these organs during pregnancy and infancy and, based on its functional characteristics, present the latest available research on the beneficial role of lutein in the pediatric population. The potential effects of lutein in ameliorating conditions associated with increase oxidative stress such as in prematurity will be also addressed. Since consumption of lutein rich foods falls short of government guidelines and in most region of the world infant formulas lack this bioactive, dietary recommendations for pregnant and breastfeeding women and their child can help to bridge the gap.
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Affiliation(s)
- Diego Gazzolo
- Neonatal Intensive Care Unit, Department of Pediatrics, University G. d’Annunzio, 65100 Chieti, Italy
- Department of Pediatrics, Maastricht University, 6200 MD Maastricht, The Netherlands
| | - Simonetta Picone
- Neonatal Intensive Care Unit, Policlinico Casilino, 00169 Rome, Italy;
| | - Alberto Gaiero
- Pediatric and Neonatology Unit, asl2 Ospedale San Paolo Savona, 17100 Savona, Italy;
| | - Massimo Bellettato
- Department of Women and Child’s Health, San Bortolo Hospital, 36100 Vicenza, Italy;
| | - Gerardo Montrone
- S.S.V.D “NIDO E STEN” Ospedali Riuniti Foggia, 71122 Foggia, Italy;
| | | | - Gianluca Lista
- Neonatal Intensive Care Unit, Department of Pediatrics, Ospedale dei Bambini V. Buzzi, ASST-FBF-Sacco, 20154 Milan, Italy;
| | - Guido Pellegrini
- Department of Pediatrics and Neonatology, Presidio Ospedaliero “Città di Sesto San Giovanni, Sesto san Giovanni, 20099 Milan, Italy;
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Wołoszynowska-Fraser MU, Kouchmeshky A, McCaffery P. Vitamin A and Retinoic Acid in Cognition and Cognitive Disease. Annu Rev Nutr 2021; 40:247-272. [PMID: 32966186 DOI: 10.1146/annurev-nutr-122319-034227] [Citation(s) in RCA: 60] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The history of vitamin A goes back over one hundred years, but our realization of its importance for the brain and cognition is much more recent. The brain is more efficient than other target tissues at converting vitamin A to retinoic acid (RA), which activates retinoic acid receptors (RARs). RARs regulate transcription, but their function in the cytoplasm to control nongenomic actions is also crucial. Controlled synthesis of RA is essential for regulating synaptic plasticity in regions of the brain involved in learning and memory, such as the hippocampus. Vitamin A deficiency results in a deterioration of these functions, and failure of RA signaling is perhaps associated with normal cognitive decline with age as well as with Alzheimer's disease. Further, several psychiatric and developmental disorders that disrupt cognition are also linked with vitamin A and point to their possible treatment with vitamin A or RA.
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Affiliation(s)
| | - Azita Kouchmeshky
- Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, Scotland, United Kingdom;
| | - Peter McCaffery
- Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, Scotland, United Kingdom;
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