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Related Concept Videos

Hypoglycemia and Glucagon01:15

Hypoglycemia and Glucagon

Without prolonged fasting, healthy individuals maintain blood glucose levels above 3.5 mM due to a well-adapted neuroendocrine counterregulatory system that effectively prevents acute hypoglycemia, a potentially life-threatening condition. The primary clinical scenarios for hypoglycemia encompass diabetes treatment, inappropriate production of endogenous insulin or insulin-like substances by tumors, and the use of glucose-lowering agents in non-diabetic individuals. Notably, hypoglycemia in the...
Glucose Transporters01:27

Glucose Transporters

Glucose transporters facilitate the transport of glucose across the cell membrane. In addition to glucose, some glucose transporters can also aid the movement of other hexoses such as fructose, mannose, and galactose.
Facilitated diffusion-glucose transporters (GLUTs) are encoded by the solute-linked carrier (SLC) family 2, subfamily A gene family, or SLC2A. The 14 GLUT protein members are distributed into three classes:
Hyperglycemia01:29

Hyperglycemia

Hyperglycemia is an abnormally high blood glucose level. It is diagnosed by fasting glucose ≥126 mg/dL, 2-hour oral glucose tolerance test (or OGTT) ≥200 mg/dL, random glucose ≥200 mg/dL with symptoms, or HbA1c ≥6.5%. However, HbA1c results may be unreliable in certain conditions, such as anemia or hemoglobinopathies, and the diagnosis should be confirmed unless classic symptoms are present. Postprandial hyperglycemia is typically considered significant when glucose levels exceed 180 mg/dL two...
Glucose Homeostasis: Regulation of Blood Glucose01:02

Glucose Homeostasis: Regulation of Blood Glucose

Carbohydrates consumed through foods are converted into glucose, a crucial energy source for the body. In the prandial state, high blood glucose levels stimulate the secretion of insulin from the pancreas. Insulin inhibits hepatic glucose production and stimulates glucose uptake and metabolism by muscle and adipose tissue. The excess glucose is converted into glycogen and stored in the liver and muscles.
During fasting, when blood glucose levels are low, the pancreas secretes glucagon. it...
Overview of Carbohydrate Metabolism01:19

Overview of Carbohydrate Metabolism

Carbohydrate metabolism is a fundamental biochemical process that ensures a constant supply of energy to living cells. The most important carbohydrate is glucose, which can be broken down via glycolysis to enter into the Krebs cycle and eventually lead to the production of ATP through oxidative phosphorylation.
Glucose transport into cells is facilitated by a family of transport proteins called GLUT (Glucose Transporters). GLUT4 is the primary glucose transporter for insulin-stimulated glucose...
Glucagon-like Receptor Agonists01:24

Glucagon-like Receptor Agonists

Incretins include glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP), which stimulate insulin secretion post-meals. In type 2 diabetes, GIP's efficacy is reduced, making GLP-1 a viable drug target. GIP originates from preproGIP.
GLP-1, when administered in high doses intravenously, triggers insulin secretion, inhibits glucagon release, slows gastric emptying, reduces food intake, and restores normal insulin secretion. However, its rapid inactivation by the...

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Updated: Jun 16, 2026

A Model of Chronic Nutrient Infusion in the Rat
08:18

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Published on: August 14, 2013

The refeeding syndrome and glucose load.

Graeme O'Connor1, Jonathon Goldin

  • 1Division of Nutrition and Dietetics, Great Ormond Street Children's Hospital, London, United Kingdom. graeme.oconnor@nhs.net

The International Journal of Eating Disorders
|February 4, 2010
PubMed
Summary

Refeeding syndrome can occur even with cautious nutritional reintroduction in anorexia nervosa patients. This case highlights risks of hypophosphatemia, hypotension, and cardiac issues, even in young patients.

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A Model of Chronic Nutrient Infusion in the Rat
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Extracellular Glucose Depletion as an Indirect Measure of Glucose Uptake in Cells and Tissues Ex Vivo
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Extracellular Glucose Depletion as an Indirect Measure of Glucose Uptake in Cells and Tissues Ex Vivo

Published on: April 6, 2022

Area of Science:

  • Pediatric Endocrinology
  • Nutritional Psychiatry
  • Clinical Case Study

Background:

  • Anorexia nervosa (AN) is a serious eating disorder with significant physical complications.
  • Refeeding syndrome (RS) is a potentially fatal complication of nutritional rehabilitation in malnourished individuals.
  • Early identification and management of RS are critical for patient outcomes.

Observation:

  • A 10-year-old female with anorexia nervosa developed refeeding syndrome despite a conservative refeeding protocol.
  • The patient experienced hypophosphatemia, hypotension, and cardiac abnormalities during nutritional reintroduction.
  • This case represents the youngest reported instance of refeeding syndrome in a patient with anorexia nervosa.

Findings:

  • Cautious refeeding, even at 25 kcal/kg, can precipitate refeeding syndrome.
  • Fluid shifts, glucose dysregulation, and electrolyte imbalances are key features of RS.
  • Carbohydrate intake may exacerbate the metabolic disturbances seen in refeeding syndrome.

Implications:

  • Clinicians must remain vigilant for refeeding syndrome in all anorexia nervosa patients, regardless of age or refeeding pace.
  • This case underscores the need for meticulous biochemical and physiological monitoring during nutritional rehabilitation.
  • Further research into the role of specific macronutrients, particularly carbohydrates, in precipitating refeeding syndrome is warranted.