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. cdc.gov

OBJECTIVE: To examine the relationships between circulating concentrations of C-reactive protein and concentrations of retinol, retinyl esters, vitamin C, vitamin E, carotenoids, and selenium. DESIGN: Cross-sectional study using National Health and Nutrition Examination Survey III (1988-1994) data. SETTING: United States population. SUBJECTS: Up to 14 519 US noninstitutionalized civilian men and women aged > or=20 y. RESULTS: C-reactive protein concentration (dichotomized at the sex-specific 85th percentile) was inversely and significantly associated with concentrations of retinol, retinyl esters, vitamin C, alpha-carotene, beta-carotene, cryptoxanthin, lutein/zeaxanthin, lycopene, and selenium after adjustment for age, sex, race or ethnicity, education, cotinine concentration, body mass index, leisure-time physical activity, and aspirin use. CONCLUSIONS: These results suggest that the inflammatory process, through the production of reactive oxygen species, may deplete stores of antioxidants. Whether increased consumption of foods rich in antioxidants or supplementation with antioxidants can provide health benefits to people characterized by elevated C-reactive protein concentrations may be worthy of further study.

lutein online source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12947436&dopt=Abstract lutein




Asia Pac J Clin Nutr. 2004;13(Suppl):S117.
The relationship between dietary carotenoids and prostate cancer risk in Southeast Chinese men.

Binns CW, LJ LJ, Lee AH.

School of Public Health, Curtin University of Technology, Perth, 6845 WA, Australia.

To investigate whether dietary intake of lycopene and other carotenoids has an aetiological association with prostate cancer, a case-control study was conducted in Hangzhou, southeast China during 2001-2002. The cases were 130 incident patients with histologically confirmed adenocarcinoma of the prostate. The controls were 274 hospital inpatients without prostate cancer or any other malignant diseases, who were matched to the age of cases. Information on usual food consumption, including all vegetables and fruits, was collected by face-to-face interview using a structured food frequency questionnaire. The risk of prostate cancer for the intake of carotenoids and selected vegetables and fruits rich in carotenoids was assessed using multivariate logistic regression, adjusting for age, locality, education, income, body mass index, marital status, number of children, family history of prostate cancer, tea drinking, total fat and caloric intake. The prostate cancer risk declined with increasing consumption of lycopene, alpha-carotene, beta-carotene, beta-cryptoxanthin, lutein and zeaxanthin. Tomatoes, pumpkin, spinach, watermelon and citrus intake were also inversely related to the risk of prostate cancer. The adjusted odds ratio for the highest quartiles compared with the lowest were 0.18 (95% CI: 0.08-0.41) for lycopene, 0.43 (95% CI: 0.21-0.85) for alpha-carotene, 0.34 (95% CI: 0.17-0.69) for beta-carotene, 0.15 (95% CI: 0.06-0.34) for alpha-cryptoxanthin and 0.02 (95% CI: 0.01-0.10) for lutein and zeaxanthin. The dose response relationships were also significant, suggesting that intake of lycopene and other carotenoid rich vegetables and fruits may associate with a reduced risk of prostate cancer.

lutein online source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=15294649&dopt=Abstract lutein



J Agric Food Chem. 2003 Nov 19;51(24):7044-9.
Identification and quantification of zeaxanthin esters in plants using liquid chromatography-mass spectrometry.

Weller P, Breithaupt DE.

Universitat Hohenheim, Institut fur Lebensmittelchemie, Garbenstrasse 28, D-70599 Stuttgart, Germany.

It has been suggested that lutein and zeaxanthin may decrease the risk for age-related macular degeneration. Surprisingly, oleoresins rich in zeaxanthin are not yet available on the market. Several authors have reported enhanced stability of esterified xanthophylls, so plants containing zeaxanthin esters were investigated to establish valuable sources for the production of durable oleoresins. Liquid chromatography-atmospheric pressure chemical ionization mass spectrometry [LC-(APCI)MS] was used to unequivocally identify zeaxanthin esters of a standard mixture and in several plant extracts. Zeaxanthin esters were quantified on the basis of their respective molecular masses using zeaxanthin for calibration; total zeaxanthin was determined after saponification of aliquots of the extracts. Thus, dried wolfberries (Lycium barbarum), Chinese lanterns (Physalis alkekengi), orange pepper (Capsicum annuum), and sea buckthorn (Hippophae rhamnoides) proved to be valuable zeaxanthin ester sources. The present LC-MS method allows for an even more detailed analysis of zeaxanthin esters than reported previously.

lutein online source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=14611169&dopt=Abstract lutein

utmb.edu

The stability to autoxidation of the polar carotenoids, lutein and zeaxanthin, was compared to that of the less polar carotenoids, beta-carotene and lycopene at physiologically or pathophysiologically relevant concentrations of 2 and 6 microM, after exposure to heat or cigarette smoke. Three methodological approaches were used: 1) Carotenoids dissolved in solvents with different polarities were incubated at 37 and 80 degrees C for different times. 2) Human plasma samples were subjected to the same temperature conditions. 3) Methanolic carotenoid solutions and plasma were also exposed to whole tobacco smoke from 1-5 unfiltered cigarettes. The concentrations of individual carotenoids in different solvents were determined spectrophotometrically. Carotenoids from plasma were extracted and analyzed using high performance liquid chromatography. Carotenoids were generally more stable at 37 than at 80 degrees C. In methanol and dichloromethane the thermal degradation of beta-carotene and lycopene was faster than that of lutein and zeaxanthin. However, in tetrahydrofuran beta-carotene and zeaxanthin degraded faster than lycopene and lutein. Plasma carotenoid levels at 37 degrees C did not change, but decreased at 80 degrees C. The decrease of beta-carotene and lycopene levels was higher than those for lutein and zeaxanthin. Also in the tobacco smoke experiments the highest autoxidation rates were found for beta-carotene and lycopene at 2 microM, but at 6 microM lutein and zeaxanthin depleted to the same extent as beta-carotene. These data support our previous studies suggesting that oxidative stress degrade beta-carotene and lycopene faster than lutein and zeaxanthin. The only exception was the thermal degradation of carotenoids solubilized in tetrahydrofuran, which favors faster breakdown of beta-carotene and zeaxanthin.

lutein online source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=15096658&dopt=Abstract lutein

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