Preclinical Imaging Studies: Protocols, Preparation, Anesthesia, and Animal Care

Area of Science:

• * Preclinical imaging
• * Translational research
• * Animal models

Background:

• * Positron emission tomography (PET) imaging facilitates the connection between laboratory research and clinical applications.
• * Nearly identical imaging protocols can be applied to both animal models and humans, bridging the gap between preclinical and clinical research.
• * Significant hurdles exist in preclinical PET imaging, particularly concerning animal anesthesia and monitoring during scans.

Purpose of the Study:

• * To review common pitfalls in preclinical PET imaging based on practical experience.
• * To provide guidance on designing studies, selecting appropriate anesthesia, and implementing effective monitoring strategies.
• * To highlight critical considerations for ensuring accurate results and animal welfare in preclinical PET studies.

Main Methods:

• * Review of practical experiences and common challenges in preclinical PET imaging.
• * Discussion on study design considerations for animal models.
• * Emphasis on the selection and impact of anesthesia and monitoring techniques.

Main Results:

• * Anesthesia choice significantly influences study outcomes, potentially more than the experimental procedures themselves.
• * Continuous monitoring is essential for maintaining physiological homeostasis in anesthetized animals, crucial for reliable results.
• * Rodents are particularly susceptible to hypothermia, necessitating careful management during imaging.
• * Proper catheterization for tracer administration and blood sampling, along with consideration for rodent physiology, are vital.

Conclusions:

• * Selecting appropriate anesthesia and monitoring protocols is paramount for both scientific accuracy and animal welfare in preclinical PET imaging.
• * Overcoming challenges related to anesthesia, physiological stability, and experimental design is key to successful translational research using PET.
• * Careful planning, including tracer administration and sample collection, minimizes scan interference and accounts for the unique physiology of small animal models.