An optimized protocol for handling and processing fragile acini cultured with the hanging drop technique

Area of Science:

• Biotechnology and Cell Biology
• Microscopy and Imaging
• 3D Cell Culture Models

Background:

• The hanging drop technique facilitates the development of functional 3D mammary acini without exogenous extracellular matrix.
• Preserving the integrity of these delicate 3D structures during advanced microscopic analysis presents significant challenges.

Purpose of the Study:

• To adapt the hanging drop culture protocol for robust microscopic investigation.
• To minimize the loss of cellular components during sample processing for advanced imaging.

Main Methods:

• Development of modified handling procedures for hanging drop cultures.
• Application of confocal microscopy for high-resolution imaging.
• Utilizing scanning electron microscopy for surface topography analysis.
• Employing transmission electron microscopy for ultrastructural examination.

Main Results:

• Successfully preserved fragile 3D mammary acini during sample preparation.
• Enabled detailed imaging of cellular and tissue architecture using multiple advanced microscopy techniques.
• Demonstrated minimal loss of cellular material throughout the processing workflow.

Conclusions:

• The adapted hanging drop protocol effectively supports the investigation of 3D mammary constructs via advanced microscopy.
• This optimized method enhances the study of tissue morphogenesis and cellular interactions in a physiologically relevant 3D context.
• The technique provides a valuable tool for researchers studying mammary gland development and disease.