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Related Concept Videos

Acid Suppressive Drugs for Peptic Ulcer Disease: Histamine H2-Receptor Antagonists01:28

Acid Suppressive Drugs for Peptic Ulcer Disease: Histamine H2-Receptor Antagonists

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Histamine H2 receptors, which are intricately located on the basolateral membrane of parietal cells, play a crucial role in modulating gastric acid secretion. When released from enterochromaffin-like cells, histamine engages H2 receptors, initiating the cyclic AMP (cAMP) pathway. In this pathway, adenylyl cyclase converts ATP into cAMP, elevating intracellular cAMP levels. The activation of protein kinase A follows, stimulating the proton pump. This stimulation prompts the secretion of hydrogen...
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Upper Respiratory Drugs: First and Second-Generation Antihistamines01:15

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Antihistamines are a class of drugs widely used to alleviate the symptoms of allergies, such as sneezing, itching, and nasal congestion. They work by inhibiting the actions of histamine, which is released by immune cells in response to allergenic substances or tissue injuries.
Histamine binds to specific receptor sites, known as H1 receptors, on tissue cells, triggering inflammation and swelling. Antihistamines combat these effects by competing with histamine for these receptor sites. By...
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Hormones Secreted by the Stomach01:25

Hormones Secreted by the Stomach

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Enteroendocrine cells, accounting for only 1% of stomach epithelial cells, play a significant role in digestion and are classified by their digestive hormone secretions.
Each of these hormones secreted by different enteroendocrine cells plays a unique role in digestion. Here are a few examples:
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Hormonal Regulation01:40

Hormonal Regulation

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Hormones regulate a significant portion of digestion through activation of the neuroendocrine system. The neuroendocrine system of digestion contains many different hormones all with multiple functions that are both, directly and indirectly, involved in digestion.
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Allergic Reactions

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Overview
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Hypersensitivities01:30

Hypersensitivities

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Hypersensitivity, also known as a hypersensitivity reaction or allergic reaction, is a condition where the body's immune system reacts abnormally to a foreign substance. Such substances, that cause hypersensitivity are referred to as an allergen, could be something typically harmless to most people, like pollen or certain foods.
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Correction: Kim, K.-H.; Yoo, B.C. Gintonin as a Lysophosphatidic Acid-Enriched GPCR Ligand System: Molecular Architecture and Receptor Pharmacology in <i>Panax ginseng</i>. <i>Biomolecules</i> 2026, <i>16</i>, 465.

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Humanized Mediator Release Assay as a Read-Out for Allergen Potency
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New Insight in Histamine Functions.

Silvia Sgambellone1, Silvia Marri1, Emanuela Masini1

  • 1Department of Neuroscience, Psychology, Drug Research and Child Health (NEUROFARBA), Section of Pharmacology, University of Florence, Viale Gaetano Pieraccini, 6, 50139 Florence, Italy.

Biomolecules
|May 28, 2022
PubMed
Summary
This summary is machine-generated.

Histamine (HA) causes blood vessel dilation and gut muscle contraction. It also constricts airways during anaphylaxis, highlighting its diverse physiological roles.

Area of Science:

  • Pharmacology and Physiology
  • Immunology

Background:

  • Histamine (HA) is a key mediator in physiological and pathological processes.
  • Early research identified HA's roles in vasodilation and smooth muscle contraction.

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