Morphologic effects of estrogen stimulation on 3D MCF-7 microtissues

Area of Science:

• Biomedical Engineering
• Cell Biology
• Endocrinology

Background:

• Three-dimensional (3D) cell cultures offer a more biologically relevant model than traditional 2D cultures, bridging the gap between in vitro and in vivo systems.
• MCF-7 human breast carcinoma cells in scaffold-free 3D culture form differentiated microtissues with a luminal space, mimicking aspects of human tissue.

Purpose of the Study:

• To investigate the effects of estradiol and its receptor-specific agonists on MCF-7 microtissue morphology and gene expression.
• To evaluate the utility of scaffold-free 3D culture systems for studying estrogenic compound effects.

Main Methods:

• MCF-7 cells were cultured in a 3D scaffold-free system to form microtissues.
• Microtissues were exposed to estradiol or specific estrogen receptor agonists (estrogen receptor alpha, estrogen receptor beta, G-protein coupled estrogen receptor).
• Morphological changes, lumen formation, and gene expression profiles were analyzed.

Main Results:

• Estradiol exposure decreased lumen formation and altered microtissue morphology and gene expression related to estrogen signaling, cell adhesion, and cell cycle regulation.
• Receptor-specific agonists induced unique phenotypes and gene expression signatures, highlighting differential signaling pathways.
• Scaffold-free 3D culture demonstrated sensitivity to estrogenic compounds.

Conclusions:

• Scaffold-free 3D cell culture models provide a valuable platform for studying the complex effects of estrogenic compounds on human cells.
• These models enable the investigation of receptor-specific responses to estrogen, offering insights into endocrine signaling.
• The system facilitates the study of phenotypic and molecular changes relevant to breast cancer research and drug development.