Dream Pharm Mother Nature's Timesless Recipes Lutein

References online: Lutein

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Lutein and Eye Nutrition Center: Home| Lutein and Eye Nutrition Center: What is Lutein ?| Lutein and Eye Nutrition Center: What does Lutein do for us ?| Lutein and Eye Nutrition Center: Are we taking enough lutein ?| Lutein and Eye Nutrition Center: Are there other eye nutritions than Lutein ?| Lutein and Eye Nutrition Center: Research Reports: Role of Carotenoids| Lutein and Eye Nutrition Center: Research Reports: Serum lutein and carotenoid level in response to taking dietary carotenoids| Lutein and Eye Nutrition Center: Research Reports: Lutein and Lung Function| Lutein and Eye Nutrition Center: Research Reports: Lutein and Congestive Heart Failure| Lutein and Eye Nutrition Center: Research Reports: Lutein, Lycopene, and Prostate Cancer| Lutein and Eye Nutrition Center: Research Reports: Lutein, carotenoids, and breast cancer| Lutein and Skin Cancer| Lutein: General Information Page| Lutein and Age-related Macular Degeneration| Lutein improves visual function in age-related cataracts patients| Lutein may be a nutritional factor for protecting lens in age-related cataracts patients| Intakes of antioxidants in coffee, wine, and vegetables are correlated with plasma carotenoids in humans.| Plasma Antioxidant Status, Immunoglobulin G Oxidation and Lipid Peroxidation in Demented Patients: Relevance to Alzheimer Disease and Vascular Dementia.| Photo-oxidative stress in a xanthophyll-deficient mutant of Chlamydomonas.| Application of tristimulus colorimetry to estimate the carotenoids content in ultrafrozen orange juices.| Macular pigment: quantitative analysis on autofluorescence images.| QTL and candidate genes phytoene synthase and zeta-carotene desaturase associated with the accumulation of carotenoids in maize.| Thermal processing of vegetables increases cis isomers of lutein and zeaxanthin.| Serum vitamins and the subsequent risk of bladder cancer.| The relationship between dietary carotenoids and prostate cancer risk in Southeast Chinese men.| Macular pigments: their characteristics and putative role.| The effect of an acute phase response on tissue carotenoid levels of growing chickens (Gallus gallus domesticus).| Resonance Raman measurement of macular carotenoids in retinal, choroidal, and macular dystrophies.| Assessment of carotenoid bioavailability of whole foods using a Caco-2 cell culture model coupled with an in vitro digestion.| Lutein, zeaxanthin, macular pigment, and visual function in adult cystic fibrosis patients.| Serum Carotenoid and Retinol Levels during Childhood Infections.| Chlorophyll, carotenoids and the activity of the xanthophyll cycle.| De-epoxidation of violaxanthin in light-harvesting complex I proteins.| Carotenogenesis during tuber development and storage in potato. adm.monash.edu.au

Our understanding of the influence of nutrition on bone health is limited because most studies concentrate on the role of calcium and protein, while other nutrients receive less attention. Recent evidence shows a positive link between fruit and vegetable consumption and bone health. In the present study, the relationships of dietary intakes of preformed retinol and carotenoids, one group of phytonutrients abundant in fruit and vegetables, were examined in an Anglo-Celtic Australian population of 68 men and 137 women. Bone mass of total body and lumbar spine were positively related to lycopene intake in men, and to lycopene and lutein/zeaxanthin intake in premenopausal women. In addition, a positive association of lumbar spine bone mass with dietary beta-carotene intake was observed in postmenopausal women. No relationship was found between dietary retinol intake and bone mineral status. The finding of the present study suggests a beneficial effect of fruit and vegetable consumption, as indicated by dietary carotenoid intake, on bone health, possibly via an antioxidant mechanism.

lutein online source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=14672872&dopt=Abstract lutein

akh-wien.ac.at

PURPOSE: A review of the role of the carotenoids, lutein and zeaxanthin, and their function in altering the pathogenesis of age-related macular degeneration (AMD). METHODS: Medline and Embase search. RESULTS: Recent evidence introduces the possibility that lutein and zeaxanthin, carotenoids found in a variety of fruits and vegetables may protect against the common eye disease of macular degeneration. This potential and the lack to slow the progression of macular degeneration, has fueled high public interest in the health benefits of these carotenoids and prompted their inclusion in various supplements. The body of evidence supporting a role in this disease ranges from basic studies in experimental animals to various other clinical and epidemiological studies. Whilst some epidemiological studies suggest a beneficial role for carotenoids in the prevention of AMD, others are found to be unrelated to it. Results of some clinical studies indicate that the risk for AMD is reduced when levels of the carotenoids are elevated in the serum or diet, but this correlation is not observed in other studies. Published data concerning the toxicity of the carotenoids or the optimum dosage of these supplements is lacking. CONCLUSION: An intake of dietary supplied nutrients rich in the carotenoids, lutein and zeaxanthin, appears to be beneficial in protecting retinal tissues, but this is not proven. Until scientifically sound knowledge is available we recommend for patients judged to be at risk for AMD to: alter their diet to more dark green leafy vegetables, wear UV protective lenses and a hat when outdoors. Future investigations on the role of nutrition, light exposure, genetics, and combinations of photodynamic therapy with intravitreal steroid (triamcinolone-acetonide) injections hold potential for future treatment possibilities.

lutein online source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=14670087&dopt=Abstract lutein



J Biol Chem. 2004 Feb 20;279(8):6337-44. Epub 2003 Dec 08.
Photo-oxidative stress in a xanthophyll-deficient mutant of Chlamydomonas.

Baroli I, Gutman BL, Ledford HK, Shin JW, Chin BL, Havaux M, Niyogi KK.

Department of Plant and Microbial Biology, University of California, Berkeley, California 94720-3102, USA.

When there is an imbalance between the light energy absorbed by a photosynthetic organism and that which can be utilized in photosynthesis, photo-oxidative stress can damage pigments, proteins, lipids, and nucleic acids. In this work we compared the wild type and a xanthophyll-deficient mutant of Chlamydomonas reinhardtii in their response to high amounts of light. Wild-type Chlamydomonas cells were able to acclimate to high amounts of light following transfer from low light conditions. In contrast, the npq1 lor1 double mutant, which lacks protective xanthophylls (zeaxanthin and lutein) in the chloroplast, progressively lost viability and photosynthetic capacity along with destruction of thylakoid membrane protein-pigment complexes and accumulation of reactive oxygen species and membrane lipid peroxides. Loss of viability was partially rescued by lowered oxygen tension, suggesting that the high sensitivity of the mutant to light stress is caused by the production of reactive oxygen species in the chloroplast. Cell death was not prevented by the addition of an organic carbon source to the growth medium, demonstrating that the photo-oxidative damage can target other essential chloroplast processes besides photosynthesis. From the differential sensitivity of the mutant to exogenously added pro-oxidants, we infer that the reactive oxygen species produced during light stress in npq1 lor1 may be singlet oxygen and/or superoxide but not hydrogen peroxide. The bleaching phenotype of npq1 lor1 was not due to enhanced photodamage to photosystem II but rather to a less localized phenomenon of accumulation of photo-oxidation products in chloroplast membranes.

lutein online source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=14665619&dopt=Abstract lutein



J Agric Food Chem. 2003 Dec 17;51(26):7825-34.
Phytochemical profiles and antioxidant activity of wheat varieties.

Adom KK, Sorrells ME, Liu RH.

Departments of Food Science and Plant Breeding and Institute of Comparative and Environmental Toxicology, Cornell University, Ithaca, New York 14853-7201, USA.

Whole grain consumption has been associated with reduced risk of chronic diseases, such as cardiovascular diseases and cancer. These beneficial effects have been attributed to the unique phytochemicals of grains that complement those found in fruits and vegetables. Wheat is one of the major grains in the human diet; however, little is known about the inherent varietal differences in phytochemical profiles, total phenolic and carotenoid contents, or total antioxidant activities of different wheat varieties, which ultimately influence the associated nutritional and health benefits of wheat and wheat products. The objectives of this study were to determine the phytochemical profiles and total antioxidant activity for 11 diverse wheat varieties and experimental lines. The profiles included free, soluble-conjugated, and insoluble-bound forms of total phenolics, flavonoids, and ferulic acids and carotenoid content including lutein, zeaxanthin, and beta-cryptoxanthin. The results showed that total phenolic content (709.8-860.0 micromol of gallic acid equiv/100 g of wheat), total antioxidant activity (37.6-46.4 micromol of vitamin C/g), and total flavonoid content (105.8-141.8 micromol of catechin equiv/100 g of wheat) did not vary greatly among the 11 wheat lines. However, significant differences in total ferulic acid content (p < 0.05) and carotenoid content (p < 0.05) among the varieties were observed, with carotenoid content exhibiting the greatest range of values. Carotenoid content among the 11 wheat varieties exhibited 5-fold, 3-fold, and 12-fold differences in lutein, zeaxanthin, and beta-cryptoxanthin, respectively. A synthetic wheat experimental line, W7985, gave the lowest carotenoid concentrations of any of the genotypes in this study. Such large genotypic differences in carotenoid content may open up new opportunities for breeding wheat varieties with higher nutritional value.

lutein online source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=14664553&dopt=Abstract lutein

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