Suppression of antipyretic response in rabbits by intraventricular protein synthesis inhibitor, anisomycin

Area of Science:

• Neuroscience
• Physiology
• Pharmacology

Background:

• Fever is a common physiological response to infection or inflammation.
• Endogenous pyrogen (EP) and prostaglandin E2 (PGE2) are key mediators in fever development.
• The precise mechanisms of fever regulation, particularly antipyresis, are not fully understood.

Purpose of the Study:

• To investigate the role of protein synthesis in the central nervous system (CNS) in the development of antipyresis.
• To determine if inhibiting protein synthesis affects the duration of fever induced by EP and PGE2.

Main Methods:

• Fever was induced in subjects via intravenous injection of endogenous pyrogen (EP) and intraventricular prostaglandin E2 (PGE2).
• Anisomycin, a protein synthesis inhibitor, was administered intraventricularly.
• Administration of anisomycin occurred either 30 minutes before or 1 hour after the injection of EP or PGE2.

Main Results:

• The duration of fevers induced by EP and PGE2 was significantly prolonged when anisomycin was administered.
• This prolongation occurred regardless of whether anisomycin was given before or after the pyrogen injections.
• The findings suggest a critical role for CNS protein synthesis in resolving fever.

Conclusions:

• Protein synthesis within the central nervous system is essential for the development of antipyresis.
• Inhibiting CNS protein synthesis interferes with the body's ability to reduce fever.
• These results highlight a potential therapeutic target for modulating fever responses.