A Bioinformatics 3D Cellular Morphotyping Strategy for Assessing Biomaterial Scaffold Niches

Area of Science:

• Biomaterials Science
• Cell Biology
• Bioinformatics

Background:

• Biomaterial scaffolds are crucial for tissue engineering and drug screening, but comparing their cell niches is challenging.
• Current comparison methods focus on cell function or material properties, not direct niche comparison.
• A standardized method is needed to compare cell niches across diverse biomaterial scaffold formats.

Purpose of the Study:

• To develop and validate a three-dimensional (3D) cellular morphotyping strategy for comparing cell niches within different biomaterial scaffolds.
• To establish a quantitative method for analyzing cell morphology in response to various scaffold types.

Main Methods:

• Cultured primary human bone marrow stromal cells (hBMSCs) on 8 different biomaterial scaffolds (fibrous, hydrogels, sponges).
• Utilized a bioinformatics approach with 82 shape metrics to analyze approximately 1000 cells per treatment group.
• Applied multivariate analysis and L1-depth metric for distinguishing cell shapes in 2D vs. 3D environments.

Main Results:

• Identified distinct cellular morphotypes: planar on 2D substrates and elongated/equiaxial with greater height in 3D scaffolds.
• Demonstrated that multivariate analysis and L1-depth effectively differentiate cell morphologies between planar and scaffold environments.
• Quantified morphological differences in hBMSCs across 10 treatment groups and 8 scaffold types.

Conclusions:

• The 3D cellular morphotyping technique provides a direct comparison of cellular microenvironments across diverse biomaterial scaffolds.
• This strategy facilitates the design of novel biomaterial scaffolds based on established cell structure-function relationships.
• Enables more accurate comparisons for tissue engineering and drug screening applications.