Growing Desmoplastic Three-Dimensional Pancreatic Cancer Spheroids from Co-Culture

Area of Science:

• Oncology
• Biomedical Engineering
• Cancer Biology

Background:

• Pancreatic ductal adenocarcinoma (PDAC) has a poor prognosis, largely due to its dense desmoplastic extracellular matrix (ECM) that hinders treatment efficacy.
• Existing pre-clinical models often fail to accurately predict clinical outcomes for PDAC therapies.
• A clinically relevant model is crucial for evaluating novel therapeutic strategies against PDAC.

Purpose of the Study:

• To describe a simple protocol for generating 3D desmoplastic spheroids that mimic the pancreatic tumor microenvironment.
• To establish a clinically relevant model for assessing the response of pancreatic cancer to experimental therapies.

Main Methods:

• Human pancreatic stellate cells (HPaSteC) and PANC-1 cells were co-cultured in a 1:2 ratio.
• Cells were cultured in a poly-HEMA coated, 96-well low attachment U-well plate, centrifuged, and incubated for 14 days with media changes every 3 days.
• Spheroid volume was monitored, and ECM components like collagen-I, hyaluronic acid, fibronectin, and laminin were assessed.

Main Results:

• A protocol for generating 3D desmoplastic spheroids with a robust, naturally formed ECM was successfully established.
• Mature spheroids, with an average volume of 0.048 ± 0.012 mm³, were formed after 14 days of culture.
• The model recapitulates key ECM components found in clinical PDAC tumors.

Conclusions:

• The developed 3D spheroid model provides a clinically relevant platform for evaluating PDAC therapies.
• This model effectively mimics the desmoplastic tumor microenvironment, overcoming limitations of previous models.
• The protocol is simple and does not require external scaffolds, facilitating its use in therapeutic assessments.