Optimal Anesthetic Regime for Motionless Three-Dimensional Image Acquisition During Longitudinal Studies of Adult...

Area of Science:

• Zebrafish research
• Anesthesiology
• Live imaging techniques

Background:

• Maintaining deep anesthesia in zebrafish is critical for live imaging, especially 3D tomography.
• Current anesthetics like MS-222 (tricaine methanesulfonate) are insufficient for prolonged motionless imaging.
• Zebrafish viability must be preserved throughout extended image acquisition.

Purpose of the Study:

• To develop and validate an improved anesthetic regimen for live adult zebrafish imaging.
• To enable motionless image acquisition for quantitative imaging platforms.
• To facilitate longitudinal studies using repeated live zebrafish imaging.

Main Methods:

• Administered a combination of MS-222 (tricaine methanesulfonate) and isoflurane (175 ppm each) to adult zebrafish.
• Utilized a novel quantitative imaging platform, compressive sensing optical projection tomography.
• Benchmarked anesthetic efficacy against imaging requirements and zebrafish viability.

Main Results:

• The MS-222 and isoflurane combination significantly improved deep anesthesia maintenance for extended periods.
• This anesthetic protocol did not negatively impact adult zebrafish health or viability.
• Nonpigmented zebrafish with the transparent gene mutation required longer to reach deep anesthesia.

Conclusions:

• The combined MS-222 and isoflurane anesthetic regime is effective for prolonged, motionless live adult zebrafish imaging.
• This protocol supports repeated, longitudinal imaging without compromising zebrafish health.
• The findings enhance accuracy and data yield in zebrafish imaging studies.