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Related Concept Videos

Obesity01:24

Obesity

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The Body Mass Index (BMI) is a numerical value derived from a person's weight and height, used to categorize individuals into weight ranges. It is calculated using the formula: weight in kilograms divided by height in meters squared. Obesity is a health condition characterized by excessive accumulation of adipose tissue that poses health risks, often diagnosed with a BMI ≥ 30. This excess fat storage occurs when surplus dietary calories are converted into triglycerides and stored in...
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Short-term regulation of food intake primarily involves neural signals from the gastrointestinal (GI) tract, blood nutrient levels, and GI tract hormones. Communication between the gut and brain via vagal nerve fibers plays a significant role in evaluating the contents of the gut. Clinical studies have shown that protein ingestion produces a more prolonged response in these nerve fibers compared to an equivalent amount of glucose. Additionally, the activation of stretch receptors caused by GI...
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Drug metabolism, a critical process in the liver, involves two primary phases: Phase I reactions and Phase II conjugation. Obesity introduces significant alterations in this metabolic process, primarily due to fatty infiltration of the liver, leading to conditions such as nonalcoholic fatty liver disease (NAFLD). This condition can modify the activities of both Phase I and II enzymes, impacting how drugs are metabolized in obese patients.Phase I metabolism sees variable effects across...
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Pharmacokinetics in Obese Patients: Drug Absorption and Distribution01:25

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Obesity significantly alters the pharmacokinetic processes of drug absorption and distribution, presenting unique challenges in medical treatment. The increased fat tissue and decreased lean muscle in obese individuals can significantly affect how drugs are absorbed into the body and distributed across different tissues. This alteration can lead to variances in the effectiveness and safety of medications, necessitating adjustments in dosing or drug selection for obese patients.One notable...
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Although not a source of energy, cholesterol plays a significant role as a foundational structure for bile salts, steroid hormones, and vitamin D, as well as being a crucial component of plasma membranes. Approximately 15% of blood cholesterol is derived from our diet, with the remainder synthesized from acetyl CoA by the liver and intestines. Cholesterol is eliminated from the body through its conversion into bile salts, which are eventually discarded in the feces.
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Overview of Lipid Metabolism01:24

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Lipid metabolism is a crucial process in the human body that involves the synthesis and degradation of lipids. This process is essential for energy production, cell membrane formation, and hormone production, among other functions.
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Related Experiment Video

Updated: Nov 3, 2025

Experimental Approach to Examine Leptin Signaling in the Carotid Bodies and its Effects on Control of Breathing
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Leptin and Obesity: Role and Clinical Implication.

Milan Obradovic1, Emina Sudar-Milovanovic1, Sanja Soskic1

  • 1Department of Radiobiology and Molecular Genetics, "VINČA" Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia.

Frontiers in Endocrinology
|June 4, 2021
PubMed
Summary

Leptin, a hormone regulating body mass, faces resistance in obesity, reducing therapeutic effectiveness. Combining leptin with sensitizers may overcome this, aiding obesity treatment.

Keywords:
leptinleptin receptorleptin resistanceleptin-based therapiesobesity

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Area of Science:

  • Endocrinology
  • Metabolism
  • Obesity Research

Background:

  • Leptin is a peptide hormone regulating key physiological processes including food intake, body mass, and reproductive function.
  • Produced by fat cells, leptin acts via the leptin receptor (LEP-R), crucial for the negative feedback loop between adipose tissue and the hypothalamus that controls body mass.
  • Leptin resistance, characterized by reduced satiety and increased body mass, often complicates obesity treatment.

Purpose of the Study:

  • To review recent findings on leptin's role in obesity.
  • To evaluate the therapeutic potential of leptin and leptin sensitizers in managing obesity.

Main Methods:

  • Review of human and animal studies.
  • Analysis of data on leptin function, leptin resistance, and obesity treatment strategies.

Main Results:

  • Leptin plays a significant role in regulating body mass through a feedback mechanism involving the hypothalamus.
  • Obesity frequently leads to leptin resistance, diminishing the efficacy of leptin therapy.
  • Combined leptin and leptin sensitizer therapies show promise for overcoming leptin resistance.

Conclusions:

  • Leptin is a critical regulator of energy homeostasis and body weight.
  • Leptin resistance is a major challenge in treating obesity.
  • Combination therapies targeting leptin signaling may offer a viable strategy for obesity management.