Effective Rapid Blood Perfusion in Xenopus

Area of Science:

• Amphibian research
• Comparative genomics
• Developmental biology

Background:

• Xenopus are established model organisms for studying vertebrate development and disease.
• Abundant blood proteins and cells in Xenopus tissues can mask molecules of interest for analysis.
• Existing methods lack standardization for tissue sampling across diverse Xenopus populations.

Purpose of the Study:

• To define a rapid and effective blood perfusion protocol for Xenopus.
• To significantly reduce blood content in all tissues for enhanced molecular and cellular studies.
• To standardize tissue sampling procedures for Xenopus laevis and Xenopus tropicalis.

Main Methods:

• A novel protocol involving direct cardiac ventricular injection of heparinized phosphate-buffered saline (PBS).
• Perfusion of the vascular system to displace blood throughout the organism.
• Procedure duration of approximately 10 minutes per animal.

Main Results:

• Achieves a consistent and drastic reduction of blood within all Xenopus tissues.
• Facilitates reproducible characterization of adult Xenopus tissues using quantitative proteomics and single-cell transcriptomics.
• Protocol is applicable to Xenopus of varying sex, age, and health status.

Conclusions:

• The defined blood perfusion protocol is crucial for advancing quantitative proteomics and single-cell transcriptomics in Xenopus.
• This method enhances the utility of Xenopus as a model organism by improving tissue analysis.
• Standardization of this perfusion technique will benefit comparative studies across different Xenopus species and conditions.