The antipyretic activity of adenosine agonists
Related Experiment Video
Updated: Oct 31, 2026

Determining the Serum Stability of Human Adenosine Deaminase 1 Enzyme
Published on: September 27, 2024
1Department of Pharmacology, Medical University of Gdansk, Poland.
Abstract:
1. Thermoregulatory reactions after IV administration of A1 [N6-cyclohexyladenosine (CHA); 0.15 mg/kg] and A2 [5'-N-ethylcarboxamidoadenosine (NECA); 0.15 mg/kg] receptor agonists were investigated in pyrogen-treated rabbits (lipopolysaccharide; 1 microgram/kg IV) at an ambient temperature of 20 +/- 1 degrees C. 2. Both compounds produced antipyresis, which was accompanied by inhibition of metabolic rate. NECA, additionally, reversed the inhibitory effect of pyrogen on respiratory rate. 3. Neither CHA nor NECA affected postpyrogen drops in ear skin temperature. 4. The mechanisms underlying the antipyretic action of the compounds in question are discussed.
Related Concept Videos
Adrenergic Agonists: Chemistry and Structure-Activity Relationship
Aromatic ring substitutions: Substituting the aromatic ring with –OH groups at positions 3 and 4 yields catecholamines (e.g., epinephrine), which have a high affinity for adrenoceptors. Hydrogen bonding between –OH groups and receptors enhances adrenergic activity.
Separation of the aromatic...
Adrenergic Agonists: Therapeutic Uses
Emergency and Intensive Care Unit (ICU) applications: Pressor agents increase blood pressure, heart rate, and contractility in shock and organ failure situations. Dopamine can induce vasodilation and stimulate adrenoceptors. Endogenous catecholamines are effective in treating cardiogenic shock. α2-agonists like clonidine can reverse anesthesia-induced hypertension.
Allergies and anaphylaxis:...
Adrenergic Agonists: Therapeutic Classification
Vasopressor or pressor agents: They increase blood pressure and function as cardiac stimulants. Examples include endogenous catecholamines (norepinephrine and dopamine) and synthetic agents (phenylephrine).
Bronchodilators: β2-agonists can relax bronchial muscles and widen airways. They are commonly used for treating obstructive pulmonary...
Adrenergic Agonists: Direct-Acting Agents
These agents can be classified...
Adrenergic Agonists: Mixed-Action Agents
Ephedrine and pseudoephedrine lack a catecholamine group, making them less susceptible to degradation by metabolic enzymes. They have increased oral bioavailability and lipophilicity, resulting in a longer duration of action. Their response is reduced by...
Adrenergic Antagonists: Pharmacological Actions of ɑ-Receptor Blockers
α1-blockers: These drugs inhibit α1-adrenoceptors on smooth muscle cells, resulting in vasodilation. This vasodilation lowers blood pressure, making α1-blockers valuable in treating hypertension. Additionally, α1-blockers effectively address urinary obstruction...

