Imaging tools for analysis of the ureteric tree in the developing mouse kidney

Area of Science:

• Developmental Biology
• Renal Physiology
• Biomedical Imaging

Background:

• Previous 2D analyses of ureteric tree structure in developing kidneys lack accuracy.
• The ureteric tree is a complex 3D structure, necessitating 3D measurement techniques.

Purpose of the Study:

• To develop and validate a novel 3D method for quantifying ureteric tree development.
• To enable accurate and precise measurement of ureteric tree growth in embryonic kidneys.

Main Methods:

• Culture of metanephric kidneys (mouse embryonic day 12, rat embryonic day 14).
• Whole-mount immunofluorescence staining of ureteric tree epithelium.
• Confocal microscopy for Z-series acquisition.
• Image analysis for binarization, skeletonization, and 3D branch length measurement.

Main Results:

• A robust 3D method for measuring ureteric tree structure was established.
• The technique allows for precise quantitation of ureteric tree growth.
• The method was extended to 4D analysis, enabling longitudinal studies.

Conclusions:

• The developed 3D imaging and analysis technique provides accurate and precise quantitation of ureteric tree growth.
• This method overcomes the limitations of previous 2D approaches.
• The 4D extension facilitates detailed studies of kidney development over time.