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A 3D-Printable Cell Array for In Vitro Breast Cancer Modeling.

Ilaria Arciero1, Silvia Buonvino2, Valeria Palumbo3

  • 1Department of Chemical Sciences and Technologies, University of Rome "Tor Vergata", Via Della Ricerca Scientifica 1, 00133 Rome, Italy.

International Journal of Molecular Sciences
|December 17, 2024
PubMed
Summary

This study shows that increasing bone tissue stiffness promotes breast cancer metastasis and microcalcification. A novel 3D model also revealed decreased drug resistance in breast cancer cells over time.

Keywords:
3D cell modelscell migrationfibroinhydrogelosteoblast-like

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Area of Science:

  • Biomedical Engineering
  • Cancer Biology
  • Materials Science

Background:

  • Breast cancer is a leading cause of cancer death in women, with metastasis to bone significantly worsening prognosis.
  • The tumor microenvironment, including tissue stiffness, plays a crucial role in cancer progression and invasiveness, but remains poorly understood.
  • Understanding how bone tissue properties influence breast cancer behavior is vital for developing effective treatments.

Purpose of the Study:

  • To investigate the impact of bone tissue stiffness on breast cancer cell behavior.
  • To develop and utilize a novel 3D cell-biomaterial system mimicking in vivo bone conditions.
  • To assess the potential of this 3D model for evaluating therapeutic responses in breast cancer.

Main Methods:

  • Development of a 3D-printable cell array using PEG-silk fibroin (PSF) hydrogels to mimic bone tissue rigidity.
  • Culturing the highly metastatic MDA-MB-231 breast cancer cell line within the 3D array.
  • Modulating hydrogel stiffness to simulate varying bone tissue environments.
  • Assessing cancer cell trans-differentiation, microcalcification production, and drug sensitivity.

Main Results:

  • Increased stiffness in the 3D model promoted trans-differentiation of MDA-MB-231 cells into osteoblast-like cells.
  • Higher stiffness also led to the production of breast microcalcifications.
  • The 3D model demonstrated a decrease in breast cancer cell drug resistance to chemotherapeutics over time.

Conclusions:

  • Bone tissue stiffness significantly influences breast cancer cell behavior, promoting osteoblast-like trans-differentiation and microcalcification.
  • The developed 3D cell-biomaterial system is a valuable platform for studying breast cancer metastasis and bone interactions.
  • This model shows promise for evaluating cancer cell drug sensitivity and therapeutic efficacy in a bone-mimicking environment.