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Related Concept Videos

Transducer Mechanism: Enzyme-Linked Receptors01:27

Transducer Mechanism: Enzyme-Linked Receptors

Enzyme-linked receptors are cell-surface receptors acting as an enzyme or associating with an enzyme intracellularly. They make excellent drug targets. Drugs can bind to the extracellular ligand-binding domain or directly affect their enzymatic domain and alter their activity.
Major types that are helpful drug targets include:
Adrenergic Receptors: ɑ Subtype01:31

Adrenergic Receptors: ɑ Subtype

Adrenoceptors are classified into α and ꞵ classes based on their potencies to catecholamine agonists. α-adrenoceptors show the following order of catecholamine potency:
Adrenaline ≥ Noradrenaline >> Isoprenaline
α-adrenoceptors are further divided into α1 and α2-adrenoceptors.
α1-Adrenoceptors: These receptors are located postsynaptically on the effector organs and cause constriction of smooth muscle mediated by activation of phospholipase C—inositol-1,4,5-trisphosphate...
Antihypertensive Drugs: Angiotensin-Converting Enzyme Inhibitors01:30

Antihypertensive Drugs: Angiotensin-Converting Enzyme Inhibitors

Angiotensin-converting enzyme (ACE), a vital component of the renin-angiotensin-aldosterone system, is abundant in lung endothelial cells. ACE converts the inactive decapeptide, angiotensin I, into the active octapeptide, angiotensin II. This potent vasoconstrictor narrows blood vessels, increasing resistance to blood flow and elevating blood pressure. Angiotensin II also stimulates aldosterone production, encouraging kidney cells to reabsorb more sodium and water from urine, thereby increasing...
Treatment for Pulmonary Arterial Hypertension: Endothelin Receptor Antagonists01:18

Treatment for Pulmonary Arterial Hypertension: Endothelin Receptor Antagonists

Endothelins (ETs) are potent vasoactive peptides critical in the human body's various physiological and pathological processes. One of the most promising therapeutic strategies for treating pulmonary arterial hypertension (PAH) involves counteracting the effects of these endothelins using a class of drugs known as endothelin receptor antagonists.
ETs are synthesized through a complex sequence of enzymatic steps, primarily involving an enzyme referred to as endothelin-converting enzyme (ECE). Of...
Pancreatic Juice and Secretion01:26

Pancreatic Juice and Secretion

Pancreatic juice is a clear fluid produced by the pancreas, containing water, salts, sodium bicarbonate, and enzymes vital for digestion in the small intestine. It helps break down large molecules, facilitating nutrient absorption.
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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.
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Related Experiment Video

Updated: Jun 26, 2026

Optimized Protocol for the Extraction of Proteins from the Human Mitral Valve
09:13

Optimized Protocol for the Extraction of Proteins from the Human Mitral Valve

Published on: June 14, 2017

The prostaglandins.

C B Clayman

    JAMA
    |August 25, 1975
    PubMed
    Summary
    This summary is machine-generated.

    Dinoprost tromethamine (Prostin F2 Alpha) is an effective second-trimester abortifacient, superior to saline. While side effects occur, experience improves outcomes for this prostaglandin therapy.

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    Published on: May 24, 2024

    Area of Science:

    • Obstetrics and Gynecology
    • Pharmacology

    Background:

    • Prostaglandins, like dinoprost tromethamine, have diverse clinical applications beyond their natural roles.
    • Dinoprost tromethamine (Prostin F2 Alpha) was the first prostaglandin used clinically as an abortifacient in the second trimester.

    Purpose of the Study:

    • To evaluate the efficacy and safety of dinoprost tromethamine for second-trimester abortion.
    • To compare dinoprost tromethamine with hypertonic saline for intra-amniotic instillation.

    Main Methods:

    • Intra-amniotic administration of dinoprost tromethamine in the United States.
    • Clinical observation of patient responses and adverse reactions.

    Main Results:

    • Dinoprost tromethamine is effective and relatively safe, outperforming hypertonic saline.
    • Adverse reactions include allergic responses, hypertension, bronchospasm, gastrointestinal distress, and uterine hyperstimulation.
    • Uterine hyperstimulation can lead to cervical laceration, lower uterine segment rupture, retained placenta, and hemorrhage.

    Conclusions:

    • Dinoprost tromethamine is a superior option for second-trimester abortion compared to hypertonic saline.
    • Improved clinical experience with dinoprost tromethamine administration enhances therapeutic outcomes and reduces adverse effects.