Vitamin B1 (Thiamin)

2015 ◽  
pp. 236-237
Keyword(s):  
Vitamin B1

HIF1-α-Mediated Gene Expression Induced by Vitamin B1 Deficiency

2013 ◽  
Vol 83 (3) ◽  
pp. 188-197 ◽  
Author(s):  
Rebecca L. Sweet ◽  
Jason A. Zastre
Keyword(s):  
Gene Expression ◽  
Thiamine Deficiency ◽  
Glucose Transporter ◽  
Neuroblastoma Cell ◽  
Hypoxia Inducible Factor ◽  
Clinical Manifestations ◽  
Vitamin B1 ◽  
Low Oxygen ◽  
Glucose Transporter 1 ◽  
Metabolic Intermediates

It is well established that thiamine deficiency results in an excess of metabolic intermediates such as lactate and pyruvate, which is likely due to insufficient levels of cofactor for the function of thiamine-dependent enzymes. When in excess, both pyruvate and lactate can increase the stabilization of the hypoxia-inducible factor 1-alpha (HIF-1α) transcription factor, resulting in the trans-activation of HIF-1α regulated genes independent of low oxygen, termed pseudo-hypoxia. Therefore, the resulting dysfunction in cellular metabolism and accumulation of pyruvate and lactate during thiamine deficiency may facilitate a pseudo-hypoxic state. In order to investigate the possibility of a transcriptional relationship between hypoxia and thiamine deficiency, we measured alterations in metabolic intermediates, HIF-1α stabilization, and gene expression. We found an increase in intracellular pyruvate and extracellular lactate levels after thiamine deficiency exposure to the neuroblastoma cell line SK-N-BE. Similar to cells exposed to hypoxia, there was a corresponding increase in HIF-1α stabilization and activation of target gene expression during thiamine deficiency, including glucose transporter-1 (GLUT1), vascular endothelial growth factor (VEGF), and aldolase A. Both hypoxia and thiamine deficiency exposure resulted in an increase in the expression of the thiamine transporter SLC19A3. These results indicate thiamine deficiency induces HIF-1α-mediated gene expression similar to that observed in hypoxic stress, and may provide evidence for a central transcriptional response associated with the clinical manifestations of thiamine deficiency.

PENGARUH KOMBINASI INTENSITAS NAUNGAN DENGAN ZAT PENGATUR TUMBUH INDOLE BUTIRIC ACID (IBA), NAPHTHALENE ACETIC ACID (NAA), DAN VITAMIN B1 DALAM AKLIMATISASI PERTUMBUHAN BIBIT GAHARU (Aquilaria beccariana)

2013 ◽  
Vol 14 (3) ◽  
Author(s):  
Daru Mulyono
Keyword(s):  
Acetic Acid ◽  
Factorial Design ◽  
Vitamin B1 ◽  
Naphthalene Acetic Acid ◽  
Randomized Design ◽  
Optimal Formula

The objective of this research is to know the optimal formula of Indole Butiric Acid (IBA), Naphthalene Acetic Acid (NAA), Vitamine B1 and the combination with shading intensities to the acclimatization of Gaharu stump (Aquilaria beccariana). This research used Factorial Design with basic analysis of Complete Randomized Design in order to know theeffect of treatment. The research was carried out in Agroindustry and Biotechnology Laboratory, Ciampea, Bogor, from July to September 2007. The results of the research showed that after 8 weeks of treatment: (a). The combination of 55 % shading intensity with IBA 15 mg/l + NAA 10 mg/l + Vitamine B1 1 mg/l was the best formula for increasingheight of Gaharu stump 4.660 cm. (b). The combination of 55 % shading intensity with IBA 15 mg/l + NAA 30 mg/l + Vitamine B1 1 mg/l was the best formula for increasing sum of Gaharu leaf stump 12.337 leafs, (c). The combination of 55 % shading intensity with IBA 15 mg/l + NAA 40 mg/l + Vitamine B1 1 mg/l was the best formula for increasing sumof Gaharu root stump 3.783 roots, and (d). The combination of 55 % shading intensity with IBA 15 mg/l + NAA 40 mg/l + Vitamine B1 1 mg/l was the best formula for increasing length of Gaharu root stump 3.686 cm.

Comparison of Extraction Methods for the Determination of Vitamin B1 and B3 in Foods

2020 ◽  
Vol 49 (8) ◽  
pp. 822-828
Author(s):  
Jimin Yoon ◽  
Naeun Kim ◽  
Ahyeong Jeon ◽  
Jihyun Kwon ◽  
Sang-Hoon Lee ◽  
...  
Keyword(s):  
Vitamin B1 ◽  
Extraction Methods

Vitamin B1: A Versatile Organocatalyst for Organic Synthesis

2017 ◽  
Vol 4 (2) ◽  
Author(s):  
Ruby Singh ◽  
Shakeel Ahmad Ganaie ◽  
Aakash Singh
Keyword(s):  
Organic Synthesis ◽  
Vitamin B1

Directing cation-cation interactions in thiamine compounds: Analysis of a series of organic salts based on vitamin B1

2021 ◽  
Vol 1232 ◽  
pp. 130046
Author(s):  
Joseph Traver ◽  
Erica Chenard ◽  
Matthias Zeller ◽  
Gary L. Guillet ◽  
Will E. Lynch ◽  
...  
Keyword(s):  
Vitamin B1 ◽  
Organic Salts

scholarly journals Vitamin Intake and Loss of Muscle Mass in Older People with Type 2 Diabetes: A Prospective Study of the KAMOGAWA-DM Cohort

Nutrients ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 2335
Author(s):  
Fuyuko Takahashi ◽  
Yoshitaka Hashimoto ◽  
Ayumi Kaji ◽  
Ryosuke Sakai ◽  
Yuka Kawate ◽  
...  
Keyword(s):  
Type 2 Diabetes ◽  
Vitamin D ◽  
Older People ◽  
Vitamin B12 ◽  
Muscle Mass ◽  
Vitamin B1 ◽  
Vitamin D Intake ◽  
Glucagon Like Peptide 1

The aim of this prospective cohort study was to examine the relationships between the intakes of various vitamins and the loss of muscle mass in older people with type 2 diabetes (T2DM). The change in skeletal muscle mass index (SMI, kg/m2) (kg/m2/year) was defined as follows: (SMI at baseline (kg/m2) − SMI at follow-up (kg/m2))/follow-up period (year). The rate of SMI reduction (%) was calculated as follows (the change in SMI (kg/m2/year)/SMI at baseline (kg/m2)) × 100. The rate of SMI reduction ≥ 1.2% was considered as the loss of muscle mass. Among 197 people with T2DM, 47.2% of them experienced the loss of muscle mass at the 13.7 ± 5.2 month follow-up. Vitamin B1 (0.8 ± 0.3 vs. 0.8 ± 0.3 mg/day, p = 0.031), vitamin B12 (11.2 ± 8.3 vs. 13.4 ± 7.5 μg/day, p = 0.049), and vitamin D (16.5 ± 12.2 vs. 21.6 ± 13.0 μg/day, p = 0.004) intakes in people with the loss of muscle mass were significantly lower than those without. Vitamin D intake was related to the loss of muscle mass after adjusting for sex, age, exercise, alcohol, smoking, body mass index, SMI, glucagon-like peptide-1 agonist, sodium glucose cotransporter-2 inhibitor, insulin, HbA1c, creatinine, energy intake, and protein intake (adjusted odds ratio 0.93, 95% confidence interval: 0.88–0.97, p = 0.003). This study showed that vitamin D intake was related to the loss of muscle mass in older people with T2DM. Vitamin B12 intake tended to be related to the loss of muscle mass, although vitamin A, vitamin B2, vitamin B6, vitamin C, and vitamin E intake were not related.

scholarly journals CHEMICAL DETERMINATION OF VITAMIN B1

1939 ◽  
Vol 127 (2) ◽  
pp. 531-540
Author(s):  
Daniel Melnick ◽  
Henry Field
Keyword(s):  
Vitamin B1 ◽  
Chemical Determination

scholarly journals Nutritional and Functional Evaluation of Inula crithmoides and Mesembryanthemum nodiflorum Grown in Different Salinities for Human Consumption

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4543
Author(s):  
Alexandre Lima ◽  
Florinda Gama ◽  
Viana Castañeda-Loaiza ◽  
Camila Costa ◽  
Lisa M. Schüler ◽  
...  
Keyword(s):  
Salt Stress ◽  
Vitamin B1 ◽  
Nutritional Composition ◽  
Human Consumption ◽  
Functional Evaluation ◽  
Cultivation System ◽  
Safe Production ◽  
Soilless Cultivation ◽  
Relative Productivity ◽  
Β Carotene

The nutritional composition and productivity of halophytes is strongly related to the biotic/abiotic stress to which these extremophile salt tolerant plants are subjected during their cultivation cycle. In this study, two commercial halophyte species (Inula crithmoides and Mesembryanthemum nodiflorum) were cultivated at six levels of salinity using a soilless cultivation system. In this way, it was possible to understand the response mechanisms of these halophytes to salt stress. The relative productivity decreased from the salinities of 110 and 200 mmol L−1 upwards for I. crithmoides and M. nodiflorum, respectively. Nonetheless, the nutritional profile for human consumption remained balanced. In general, I. crithmoides vitamin (B1 and B6) contents were significantly higher than those of M. nodiflorum. For both species, β-carotene and lutein were induced by salinity, possibly as a response to oxidative stress. Phenolic compounds were more abundant in plants cultivated at lower salinities, while the antioxidant activity increased as a response to salt stress. Sensory characteristics were evaluated by a panel of culinary chefs showing a preference for plants grown at the salt concentration of 350 mmol L−1. In summary, salinity stress was effective in boosting important nutritional components in these species, and the soilless system promotes the sustainable and safe production of halophyte plants for human consumption.

scholarly journals BIOLOGICAL ESTIMATION OF THE THIAZOLE AND PYRIMIDINE MOIETIES OF VITAMIN B1

1945 ◽  
Vol 159 (1) ◽  
pp. 117-122
Author(s):  
H.G. Obermeyer ◽  
Ling Chen
Keyword(s):  
Vitamin B1
Sign in / Sign up

Export Citation Format

Share Document