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Lutein


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References online: Lutein




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. partners.org

Lutein and zeaxanthin are carotenoids found in green leafy vegetables with interesting antioxidant properties. They are present in high concentrations in the fovea centralis of the human retina and their role in the prevention of age-related macula degeneration has been reported. We have investigated the effect of orally administered lutein and zeaxanthin in the cutaneous response to ultraviolet B irradiation. Female hairless SKh-1 mice receiving 0.4% and 0.04% lutein plus zeaxanthin-enriched diet for 2 wk were exposed to single doses of ultraviolet B radiation. Skin biopsies were taken at 24 and 48 h after irradiation and analyzed for the presence of apoptotic cells, proliferating cells, and expression of proliferating cell nuclear antigen. Our results show a clear ultraviolet-induced dose-dependent inflammatory response. Orally administered 0.4% lutein and zeaxanthin decreased significantly the edematous cutaneous response (p<0.01) as determined by the reduction of the UVB-induced increase of ear bifold thickening. Additionally, dietary carotenoids were efficient in reducing the ultraviolet B-induced increases in the percentage of proliferating cell nuclear antigen (p<0.05), bromodeoxyuridine (p<0.05), and terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate nick end-labeling-positive cells (p<0.01). These data demonstrate that oral supplementation of lutein and zeaxanthin diminishes the effects of ultraviolet B irradiation by reducing acute inflammatory responses and ultraviolet-induced hyperproliferative rebound.

lutein online source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12880433&dopt=Abstract lutein



Arch Ophthalmol. 2003 Jul;121(7):967-72.
Resonance Raman measurement of macular carotenoids in retinal, choroidal, and macular dystrophies.

Zhao DY, Wintch SW, Ermakov IV, Gellermann W, Bernstein PS.

Department of Ophthalmology and Visual Sciences, Moran Eye Center, University of Utah School of Medicine, Salt Lake City 84132, USA.

BACKGROUND: It has been hypothesized that the macular carotenoid pigments lutein and zeaxanthin may protect against macular and retinal degenerations and dystrophies. OBJECTIVE: To test this hypothesis by objectively measuring lutein and zeaxanthin levels in a noninvasive manner in patients who have retinitis pigmentosa (RP), choroideremia (CHM), and Stargardt macular dystrophy and comparing them with an age-matched healthy control population. METHODS: Using resonance Raman spectroscopy, a novel objective noninvasive laser-optical technique, we measured macular carotenoid levels in 30 patients (54 eyes) who have RP, CHM, and Stargardt macular dystrophy and compared them with 76 age-matched subjects (129 eyes) who did not have macular pathologic conditions in a case-control study. RESULTS: As a group, patients with RP and CHM had the same macular carotenoid levels as age-matched healthy control subjects (P =.76, 2-way analysis of variance). Patients with Stargardt macular dystrophy tended to have levels of macular carotenoid pigments that, on average, were about 50% lower than healthy controls (P =.02,unpaired 2-tailed t test). CONCLUSIONS: The patients with RP and CHM had normal levels of macular carotenoids, suggesting that nutritional supplementation with macular carotenoids such as lutein, zeaxanthin, or both will be unlikely to affect the clinical course of RP and CHM. Although the number of patients with Stargardt macular dystrophy examined was limited, their macular carotenoid levels were usually lower than those of subjects of a similar age with no macular pathologic condition.

lutein online source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12860799&dopt=Abstract lutein



J Agric Food Chem. 2003 Jul 16;51(15):4219-24.
A routine high-performance liquid chromatography method for carotenoid determination in ultrafrozen orange juices.

Melendez-Martinez AJ, Vicario IM, Heredia FJ.

Department of Nutrition and Food Science, Faculty of Pharmacy, University of Seville, 41012 Sevilla, Spain.

An isocratic reversed-phase high-performance liquid chromatography method was developed for routine analysis of the main carotenoids related to the color of orange juice, using a more selective wavelength (486 nm) in which the absorption in the red-orange region of the visible spectra is maximum. Separation was carried out using as the mobile phase the mixture methanol:acetonitrile:methylene chloride:water (50:30:15:5, v/v/v/v), to which small amounts of butylated hydroxytoluene and triethylamine were added (0.1%). Identification was made by comparison either with standards obtained by thin-layer chromatography or with spectral data previously reported. The reproducibility of the method was remarkable; coefficients of variation for the most polar xanthophylls were under 1 and 4% for retention times and areas, respectively. Its application to Valencia late ultrafrozen orange juices has shown that major carotenoids are lutein + zeaxanthin (36%), lutein 5,6-epoxide (16%), antheraxanthin (14%), and beta-cryptoxanthin (12%).

lutein online source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12848488&dopt=Abstract lutein



Int J Vitam Nutr Res. 2003 May;73(3):226-31.
Plasma carotenoid levels in relation to tobacco smoking and demographic factors.

Lagiou P, Benetou V, Tebelis N, Papas A, Naska A, Trichopoulou A.

Department of Hygiene and Epidemiology, University of Athens Medical School, 75 M. Asias St. GR-115 27, Goudi, Athens, Greece.

Antioxidant compounds have been reported to play a beneficial role in the etiology of several chronic diseases. To examine the effects of tobacco smoking and demographic factors on the plasma levels of alpha-carotene, beta-carotene, lycopene, beta-cryptoxanthin, and jointly, lutein-zeaxanthin, we have conducted a cross-sectional study in the context of the Greek segment of the European Prospective Investigation into Cancer and nutrition (EPIC). A random sample of 45 men and 68 women, aged 30-82 years, from the Greek EPIC cohort of 27953 volunteers, provided fasting blood samples and completed an interviewer-administered questionnaire on lifestyle factors. Data were a







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