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RNA-seq for understanding effects of vitamin B12 removal on astrocyte culture and understanding astrocyte S1P1 signaling

ABSTRACT: This SuperSeries is composed of the SubSeries listed below.

ORGANISM(S): Mus musculus

PROVIDER: GSE99115 | GEO | 2022/05/17

REPOSITORIES: GEO

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RNA-seq for understanding effects of vitamin B12 removal on astrocyte culture

Project description:Astrocytes express a vitamin B12 uptake receptor, CD320/TCblR, that is regulated by S1P1 signaling. In search of genes controlled under B12 deficiency in astrocytes, we employed RNA-seq using RNA of astrocytes cultured in normal or B12 deficient media.

2022-05-17 | GSE99113 | GEO

RNA-seq for understanding effects of vitamin B12 removal on astrocyte culture and understanding astrocyte S1P1 signaling

Project description:RNA-seq for understanding effects of vitamin B12 removal on astrocyte culture and understanding astrocyte S1P1 signaling

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RELATIONSHIPS BETWEEN BIOTIN AND VITAMIN B12. EFFECTS OF BIOTIN AND VITAMIN B12 ON FOLIC ACID METABOLISM.

Project description:1. The effects of dietary biotin compared with vitamin B(12) on the total content and on the distribution of the various folate derivatives in the liver of rats given a biotin-free diet have been studied. The effect of both vitamins on the conversion in vitro of folic acid into citrovorum factor in the same experimental conditions was also examined. 2. In biotin-treated rats as well as in vitamin B(12)-treated rats the total content of folic acid-active substances measured microbiologically by Pediococcus cerevisiae, Streptococcus faecalis and Lactobacillus casei is significantly higher than that in biotin-deficient rats. The liver distribution of various folate derivatives in the three groups of animals is also markedly modified. 3. The amount of citrovorum factor formed in systems with liver homogenate of rats receiving biotin or vitamin B(12) is higher than that with liver homogenates of deficient rats. 4. The results obtained demonstrate the influence of biotin in the metabolism of folic acid, and the similar actions at this level of both biotin and vitamin B(12). These results are discussed in relation to the participation of the two vitamins in the metabolism of C(1) units, as a biochemical interpretation of the relationships between vitamin B(12) and biotin.

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Effects of vitamin A on ventricular myocardium gene expression

Project description:This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

2016-07-25 | E-GEOD-74906 | biostudies-arrayexpress

RNA-seq for understanding astrocyte S1P1 signaling

Project description:Astrocytic S1P1 has been previously shown to be essential for FTY720 (an orally delivered drug for MS) efficacy (CNS), in addition to its well-known immunological mechanisms of action. FTY720-P (an analogue of S1P) is a functional antagonist to S1P1. TetTag c-Fos reporter mice displayed temporal and spatial GFP-labeling of astrocytic nuclei under experimental autoimmune encephalomyelitis (EAE) pathology. We generated astrocyte conditional S1P1-KO mice in c-Fos background (S1P1-AsCKOfos). In search of essential factors controlled by S1P-S1P1 signaling in astrocytes, we employed nuclear RNA-seq using RNA of DAPI+NeuN-GFP+ nuclei isolated from spinal cords (SCs) of EAE-induced WTfos, S1P1-AsCKOfos, and FTY720-treated WTfos mice.

2022-05-17 | GSE99114 | GEO

Plasma Vitamin B12 Levels, High-Dose Vitamin B12 Treatment, and Risk of Dementia.

Project description:BackgroundIt is controversial whether B12 deficiency causes dementia or B12 treatment can prevent dementia.ObjectiveTo assess associations between low plasma (P-)B12 levels, B12 treatment, and risk of Alzheimer's disease (AD; primary outcome) and all-cause or vascular dementia (secondary outcomes).MethodsWe conducted a population-based cohort study using Danish registry data to assess associations between low P-B12 levels, high-dose injection or oral B12 treatment, and risk of dementia (study period 2000-2013). The primary P-B12 cohort included patients with a first-time P-B12 measurement whose subsequent B12 treatment was recorded. The secondary B12 treatment cohort included patients with a first-time B12 prescription and P-B12 measurement within one year before this prescription. For both cohorts, patients with low P-B12 levels (<200 pmol/L) were propensity score-matched 1:1 with patients with normal levels (200-600 pmol/L). We used multivariable Cox regression to compute 0-15-year hazard ratios for dementia.ResultsFor low P-B12 and normal P-B12 level groups, we included 53,089 patients in the primary P-B12 cohort and 13,656 patients in the secondary B12 treatment cohort. In the P-B12 cohort, hazard ratios for AD centered around one, regardless of follow-up period or treatment during follow-up. In the B12 treatment cohort, risk of AD was unaffected by low pre-treatment P-B12 levels, follow-up period and type of B12 treatment. Findings were similar for all-cause and vascular dementia.ConclusionWe found no associatio1n between low P-B12 levels and dementia. Associations were unaffected by B12 treatment. Results do not support routine screening for B12 deficiency in patients with suspected dementia.

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The pioneer factor CEBPA modulates vitamin D signaling

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Extensive transcriptional and chromatin changes underlie astrocyte maturation in vivo and in culture

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Antagonistic interaction between androgen signaling and vitamin D signaling in prostate cancer

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