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Related Concept Videos

Regulation of Food Intake01:30

Regulation of Food Intake

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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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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.
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Insulin action is mediated through a receptor tyrosine kinase, akin to the IGF-1 receptor. The number of receptors per cell varies significantly, from 40 on erythrocytes to 300,000 on adipocytes and hepatocytes. The insulin receptor consists of linked α/β subunit dimers, forming a heterotetramer glycoprotein with two extracellular α subunits and two β subunits spanning the membrane. The α subunits inhibit the inherent tyrosine kinase activity of the β subunits, but...
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Some receptors remain unoccupied even when an agonist produces a maximal response. Such empty ones are called spare receptors. In presence of spare receptors the maximum effect of an agonist drug is achieved with fewer than 100% of the receptors being occupied. To determine the presence of spare receptors, scientists often compare the concentration of the drug needed to produce 50% of the maximum effect (EC50) with the concentration of the drug needed to occupy 50% of the receptors (Kd). If the...
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The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
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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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Related Experiment Video

Updated: May 3, 2026

White and Brown Adipose Grafts: An Approach to Correct Reproductive, Metabolic, and Renal Deficits in Black and Tan Brachyury (BTBR) Obese Mice
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White and Brown Adipose Grafts: An Approach to Correct Reproductive, Metabolic, and Renal Deficits in Black and Tan Brachyury (BTBR) Obese Mice

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Antagonizing leptin: current status and future directions.

Lennart Zabeau, Frank Peelman, Jan Tavernier

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    Summary
    This summary is machine-generated.

    Leptin, a hormone from fat cells, regulates energy use for functions like reproduction and immunity. Modulating leptin signaling offers potential therapeutic strategies for autoimmune diseases and cancer.

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    Area of Science:

    • Endocrinology
    • Immunology
    • Oncology

    Background:

    • Leptin is an adipocyte-derived hormone/cytokine crucial for metabolic regulation.
    • Leptin signaling connects nutritional status to energy-intensive processes like reproduction and immune function.
    • Dysregulated leptin signaling is implicated in the pathogenesis of autoimmune diseases and tumorigenesis.

    Purpose of the Study:

    • To review current strategies for modulating leptin signaling.
    • To explore the therapeutic and research potential of targeting leptin pathways.

    Main Methods:

    • Literature review of studies on leptin signaling modulation.
    • Analysis of therapeutic approaches targeting leptin pathways.
    • Discussion of research applications for leptin modulation.

    Main Results:

    • Identification of diverse strategies to modulate leptin signaling.
    • Evaluation of the potential of these strategies in preclinical and clinical settings.
    • Highlighting the dual role of leptin in health and disease.

    Conclusions:

    • Modulating leptin signaling presents promising avenues for research and therapeutic interventions.
    • Targeting leptin pathways could offer novel treatments for metabolic, autoimmune, and oncological conditions.
    • Further investigation is warranted to optimize leptin-based therapies.