ライフサイエンスコーパス: provitamin

1 preformed vitamin A (all-trans-retinol) and provitamin A (beta,beta-carotene).

2 Sorghum grain is seriously deficient in provitamin A (beta-carotene) and in the bioavailability

3 Vitamin A (retinol) and provitamin A (beta-carotene) are metabolized to specific

4 nge-peeled fruits represent a rich source of provitamin A (ca. 124 mug retinol-activity-equivalents/1

5 n of fruit development and ripening; neither provitamin A (carotenoids) nor vitamin E contents were m

6 Treatment for STH significantly increases provitamin A (e.g., beta-carotene) levels but is associa

7 by preformed vitamin A (animal sources), not provitamin A (fruit and vegetable sources).

8 a unique ability to promote and/or stabilize provitamin A accumulation during plant growth and post-h

9 sociation between intake of carotenoids with provitamin A activity and carotid artery plaques in 12,7

10 harmacologic doses, with the excepton of the provitamin A activity of carotene.

11 nst lipid peroxidation in humans, as well as provitamin A activity.

12 the activities of dietary beta-carotene as a provitamin A and as a modulator of risk for cardiovascul

13 gress on biofortification of micronutrients (provitamin A and folates) and an essential amino acid (l

14 respectively, and the total daily supply of provitamin A and vitamin A from diet and supplements was

15 r RA production in adipocytes and implicates provitamin A as a dietary regulator of body fat reserves

16 The 15-y change in provitamin A carotenoid and lutein/zeaxanthin concentrat

17 bal health burden, can be alleviated through provitamin A carotenoid biofortification of major crop s

18 Conventionally bred maize hybrids with high provitamin A carotenoid concentrations may have the pote

19 A large range of provitamin A carotenoid conversion efficiencies was obse

20 15'-monooxygenase 1 (BCMO1), a key enzyme in provitamin A carotenoid metabolism, as a surrogate for c

21 Asymmetric alpha-carotene, a provitamin A carotenoid, is cleaved to produce retinol (

22 We evaluated the efficacy of regular provitamin A carotenoid-biofortified "orange" maizemeal

23 naturally rich in beta-carotene, the primary provitamin A carotenoid.

24 Provitamin A carotenoids (beta-carotene and beta-cryptox

25 [odds ratio (OR): 0.31; 95% CI: 0.04, 2.44], provitamin A carotenoids (OR: 0.31; 95% CI: 0.03, 2.84),

26 range maize is being promoted as a source of provitamin A carotenoids (pVAC) in Zambia.

27 Year 0 sum of provitamin A carotenoids and beta-cryptoxanthin concentr

28 The sum of provitamin A carotenoids and lycopene remained significa

29 take of vitamin A in the form of retinol and provitamin A carotenoids and the prevalence of bronchial

30 cesses through which beta-carotene and other provitamin A carotenoids are converted to vitamin A, the

31 Provitamin A carotenoids are oxidatively cleaved by beta

32 of the value of ingesting high doses of non-provitamin A carotenoids are validated.

33 ur results show that BCO1 favors full-length provitamin A carotenoids as substrates, with the notable

34 e (BCO1) catalyzes the oxidative cleavage of provitamin A carotenoids at the central 15-15' double bo

35 BCO2 catalyzes the oxidative cleavage of the provitamin A carotenoids beta-carotene, alpha-carotene,

36 imating the metabolic vitamin A potential of provitamin A carotenoids by using [2H4]retinyl acetate (

37 ess the bioavailability and bioconversion of provitamin A carotenoids have advanced significantly in

38 for stabilizing and increasing the level of provitamin A carotenoids in seeds of major food crops.

39 Provitamin A carotenoids in staple crops are not very st

40 Vitamin A activity of plant provitamin A carotenoids is uncertain.

41 in A value of individual plant foods rich in provitamin A carotenoids may vary significantly and need

42 Furthermore, the provitamin A carotenoids stored were shown to be stable

43 Provitamin A carotenoids such as beta-carotene are the m

44 mucosa plays a key role in the metabolism of provitamin A carotenoids such as beta-carotene, thus gre

45 ltimately they must derive them from dietary provitamin A carotenoids through a process known as caro

46 xcentric cleavage of both provitamin and non-provitamin A carotenoids to form apo-10'-carotenoids, in

47 catalyzes the oxidative cleavage of dietary provitamin A carotenoids to retinal (vitamin A aldehyde)

48 measurement of the bioconversion of dietary provitamin A carotenoids to vitamin A is reviewed in thi

49 s of the food matrix on the bioconversion of provitamin A carotenoids to vitamin A, dietary fat effec

50 t is expressed in the intestine and converts provitamin A carotenoids to vitamin A-aldehyde.

51 Non-provitamin A carotenoids were also cleaved, although wit

52 cleavage of 9-cis-beta-carotene and the non-provitamin A carotenoids zeaxanthin and lutein, and is i

53 The three provitamin A carotenoids, alpha- and beta-carotene and b

54 While BCO1 cleaves provitamin A carotenoids, BCO2 is more promiscuous and a

55 of lutein/zeaxanthin, lycopene, sum of the 3 provitamin A carotenoids, beta-carotene, and beta-crypto

56 e human and other species clearly absorb non-provitamin A carotenoids, little is known of the extent

57 ed to estimate dietary intake of retinol and provitamin A carotenoids, tobacco exposure, and asbestos

58 erosis in productivity and concentrations of provitamin A carotenoids.

59 noid oxygenases to synthesize retinoids from provitamin A carotenoids.

60 he first step of vitamin A biosynthesis from provitamin A carotenoids.

61 ermination of the true vitamin A activity of provitamin A carotenoids.

62 ta-Carotene from xoi gac is a good source of provitamin A carotenoids.

63 pheral vitamin A synthesis from plasma-borne provitamin A carotenoids.

64 les and 2) retinyl palmitate formed from the provitamin A carotenoids.Women (n = 12) each consumed 5

65 The meals provided 4.2 mg provitamin A carotenoids/d (mainly beta-carotene) from y

66 e two branches and a threefold difference in provitamin A compounds.

67 Biofortified maize contains enhanced provitamin A concentrations and has been bioefficacious

68 Selection of parental lines with high provitamin A content and desirable agronomic traits from

69 Several hybrids with high provitamin A content that were competitive to a commerci

70 tion genes associated with reduced endosperm provitamin A content.

71 vitamin A deficient during seasons when the provitamin A food source is limited.

72 rotene- rich rice preparation as a source of provitamin A for children in rural Vietnam.

73 effectively produce maize grain with higher provitamin A levels.

74 Recently, key players of provitamin A metabolism have been molecularly identified

75 clarify the contribution of these enzymes to provitamin A metabolism.

76 cy of red palm oil in increasing retinol and provitamin A status in pregnant and lactating women.

77 aize meal can provide significant amounts of provitamin A to diets of Zambians even after 4months of

78 rovided the greatest amount of bioaccessible provitamin A with 1850 mug/100g dry matter (DM) versus 7

79 corbic acid, total phenols, carotenoids, and provitamin A) of Cape gooseberry juice.

80 nventional white cassava roots are devoid of provitamin A, biofortified yellow varieties are naturall

81 These carotenoid-derived products include provitamin A, hormones, and flavor and fragrance molecul

82 entation with red palm oil, which is rich in provitamin A, increased alpha- and beta-carotene concent

83 Development of a rice variety enriched in provitamin A, the accumulation of polyhydroxybutyrate po

84 feature to measure electronic properties of provitamin A, vitamin E, and vitamin K1 in the gas phase

85 Mammalian genomes encode two provitamin A-converting enzymes as follows: the beta-car

86 onents of the human diet as antioxidants and provitamin A.

87 beta-Carotene is the major dietary source of provitamin A.

88 beta-Carotene is the major human dietary provitamin A. beta-Carotene-15,15'-oxygenase (CMOI) has

89 can catalyze the excentric cleavage of both provitamin and non-provitamin A carotenoids to form apo-

90 ts competition between BCO1 and BCO2 for the provitamin and the production of noncanonical beta-carot

91 Vitamins, provitamins and nutriceuticals often blunt oxidative cha