Inhalation studies with the Göttingen minipig

Area of Science:

• Pharmacology
• Toxicology
• Animal Models

Background:

• Developing effective drug delivery methods is crucial for preclinical research.
• Inhalative exposure offers a non-invasive route for administering substances.
• Minipigs are increasingly used as preclinical models due to physiological similarities to humans.

Purpose of the Study:

• To develop and validate a novel inhalative exposure method for minipigs.
• To assess the pharmacokinetic profile of verapamil administered via inhalation in minipigs.
• To evaluate the suitability of Göttingen minipigs for inhalation studies.

Main Methods:

• A computer-controlled mask inhalation system was designed for simultaneous exposure of four minipigs.
• Different controlled dose levels of test substances were administered.
• Pharmacokinetic parameters of inhaled verapamil were compared to intravenous administration.

Main Results:

• The developed system allows for precise and controlled inhalative exposure.
• Verapamil demonstrated good absorption and favorable pharmacokinetic properties following inhalation.
• Inhalation delivery resulted in comparable or improved pharmacokinetic profiles versus intravenous injection.

Conclusions:

• The novel inhalative exposure method is effective for minipigs.
• Inhalative drug administration in Göttingen minipigs is a viable and promising alternative to parenteral routes.
• This method supports further preclinical inhalation studies using minipigs.