Endocrine Abstracts

Background: Metformin is currently the first drug of choice for treatment of type 2 diabetes (T2D). Metformin is known to reduce lipid levels through activation of AMP activated protein kinase-alpha (AMPKα). Metformin induces deficiency of vitamin B12 (B12) in patients with T2D. In humans, studies have shown that low B12 is associated with dyslipidemia (higher triglycerides and low HDL). Therefore, we investigated whether B12 deficiency m...

Background: Vitamin B12 (B12) is an essential micronutrient required for optimal hematopoietic, neurologic and other several metabolic reactions. Longitudinal studies and animal models showed that low maternal vitamin B12 deficiency is associated with the maternal obesity, development of insulin resistance and metabolic syndrome phenotype. Although the mechanisms underpinning metabolic disorders remain poorly defined, it has become increasingly cle...

Background: Metformin is currently the first drug of choice for treatment of type 2 diabetes (T2D). Metformin is known to reduce lipid levels through activation of AMP activated protein kinase-alpha (AMPKα). Metformin induces deficiency of vitamin B12 (B12) in patients with T2D. In humans, studies have shown that low B12 is associated with dyslipidemia (higher triglycerides and low HDL). Therefore, we investigated whether B12 deficiency m...

Background: Vitamin B12 (B12) is an essential micronutrient required for optimal hematopoietic, neurologic and other several metabolic reactions. Longitudinal studies and animal models showed that low maternal vitamin B12 deficiency is associated with the maternal obesity, development of insulin resistance and metabolic syndrome phenotype. Although the mechanisms underpinning metabolic disorders remain poorly defined, it has become increasingly cle...

Introduction: Non-alcoholic fatty-liver disease and T2DM remain a global burden. Metformin is the first-line drug for T2DM that decreases glucose and lipid levels. However, prolonged metformin treatment decreases vitamin B12(B12), whereas low B12 is associated with obesity and dyslipidaemia. Clinical studies showed that metformin treatment increases circulating adiponectin and adiponectin improves NAFLD. Others suggested that metformin has no effect on intrahepatic triglycerid...

Background: Vitamin B12 (B12) deficiency is associated with obesity and was recently shown to trigger lipid accumulation in the adipose tissues and liver. The body is capable of synthesizing fatty acids (FAs) endogenously via de novo lipogenesis in the liver. However, dysregulated levels are associated with adverse consequences in subjects. We therefore assessed B12 regulation of de novo fatty acid synthesis and the profile of various FAs in hepatocytes.<...

Vitamin B12 (B12) is an essential micronutrient required for optimal hematopoietic, neurologic and other several metabolic reactions. Longitudinal studies and animal models showed that low maternal vitamin B12 deficiency is associated with the maternal obesity, development of insulin resistance and metabolic syndrome phenotype suggesting the crucial role of B12 in adipose tissue function. Although the mechanisms underpinning metabolic disorders remain poorly defined, the patho...

Vitamin B12 (B12) is an essential micronutrient required for two key metabolic reactions. Longitudinal studies and animal models showed that B12-deficiency during pregnancy is associated with the maternal obesity, development of insulin resistance and metabolic syndrome phenotype. Although the mechanisms underpinning low B12 and metabolic disorders remain poorly defined, it’s becoming increasingly clear that lipid dysregulation is associated with obesity and co-morbiditie...

Background: The liver stores 10 μg cobalamin per gram protein and able to hold 50% (1–1.5 mg) of body’s B12. Making up the bulk of the liver, hepatocytes express receptors regulating cellular uptake of B12 in the liver. However, relationship between circulating and intracellular B12 levels as well as regulation of hepatic uptake of B12 is unexplored.Objective: To assess the regulation of cellular uptake and storage of B12 in hepatocytes in...

Background: Metformin is utilized in clinical trials for treatment of non-alcoholic fatty liver disease (NAFLD) and obesity. Metformin increases AMP:ATP ratio activating AMP activated protein kinase-alpha (AMPKα), a mediator of fatty acid oxidation (FAO) in the liver. Meanwhile, prolonged oral metformin therapy in T2DM decreases vitamin B12(B12) in patients and evidence shows that low B12 dysregulates lipid levels. We therefore investigated whether low B12 impairs FAO ind...