Project description:Soybeans (Glycine max) were genetically modified using a gene gun to produce beta-carotene, which is not normally found in the species. beta-carotene is produced in the chloroplast in which it competes with chlorophyl for production. A proteomics analysis was performed to determine the effects of the transgene on seed protein content.

2016-07-19 | PXD000709 | Pride

Adipose tissue analysis of wild-type and beta-carotene 15-15'-oxygenase 1 (Bcmo1) ko mice fed under control diet and beta-carotene diet

Project description:Cell culture studies indicate that beta-carotene-(BC)-derived apocarotenoid signaling molecules influence the activities of nuclear receptors that regulate many aspects of adipocyte physiology. Here, we analyzed the roles of the two BC metabolizing enzymes, BCMO1 and BCDO2, for this process in mouse models. Wild-type mice converted BC into retinoids and showed reduced body adiposity (by 28%), leptinemia and adipocyte size. Genome wide microarray analysis revealed a generalized decrease of mRNA expression of peroxisome proliferator-activated receptor gamma (PPARgamma) target genes. Consistently, the expression of this key transcription factor for lipogenesis was significantly reduced both on the mRNA and protein levels. This effect of BC was absent in Bcmo1-/- mice that showed increased BCDO2 expression and gamma-10gamma-apocarotenoid production. Our study evidences an important role of BC for the control of body adiposity in mice and identifies Bcmo1 as critical molecular player for the regulation of PPARgamma activity. The goal of the study was to analyze the putative differential effects of BC accumulation on Bcmo1 ko mice, and BC metabolites in wt mice. Inguinal adipose tissue gene expression profile comparing adult male and female mice under control diet and beta-carotene (BC) supplemented diet during 14 weeks. 47 mice in total. 23 wild-type (11 male/12 female) and 24 bcmo1 (12 male/12 female) mice, fed on vitamin A diet (1500 IU vit A/kg diet) or vitamin A diet supplemented with BC (1500 IU vit A/kg diet +150 mg BC/kg diet) during 14 weeks.

2011-06-01 | E-GEOD-27271 | biostudies-arrayexpress

Molecular characterisation of High Beta Carotene (HBC) Mutant

Project description:The High-β-Carotene (HBC) mutant identified from EMS mutagenized population of cultivar Arka Vikas and the biochemical studies revealed that mutant fruits contain four times higher level of β-Carotene in comparison to Wild type (cv. Arka Vikas). We have developed whole genome microarray expression profiling as a discovery platform to identify differentially expressed genes in fruits containing High-β-Carotene mutant in comparison to Wild type (cv. Arka Vikas). Tomato fruit tissue samples from different stages of fruit ripening like Mature green, Breaker, Turning and Ripening stages of High-β-Carotene (HBC) mutant and Wild type (cv. Arka VIkas) were used for microarray gene expression analysis. Carotenoid pathway analysis of both mutant and wild type reveals that the high expression of chromoplast specific lycopene- β-cyclase gene in the HBC mutant, which is involved in the conversion of lycopene to β-carotene, but in wild type the expression of this gene, was low. Four genes (PSY, PDS, CRTISO, CYCB) of the carotenoid pathway was quantified in the same RNA samples by real-time PCR, confirming that the variation of the gene expression in HBC mutant.

2017-12-01 | GSE90964 | GEO

Metabolomic profile of response to supplementation with ?-carotene in the Alpha-Tocopherol, Beta-Carotene Cancer Prevention Study.

Project description: Not available

| S-EPMC3712556 | biostudies-literature