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Updated: Mar 5, 2026
Modeling the Early Steps of Ovarian Cancer Dissemination in an Organotypic Culture of the Human Peritoneal Cavity
Published on: December 31, 2015
A High-Throughput Screening Model of the Tumor Microenvironment for Ovarian Cancer Cell Growth
Madhu Lal-Nag1, Lauren McGee1, Rajarshi Guha1
11 Division of Preclinical Innovation, National Center for Advancing Translational Sciences (NCATS), National Institutes of Health, Bethesda, MD, USA.
Abstract:
The tumor microenvironment plays an important role in the processes of tumor growth, metastasis, and drug resistance. We have used a multilayered 3D primary cell culture model that reproduces the human ovarian cancer metastatic microenvironment to study the effect of the microenvironment on the pharmacological responses of different classes of drugs on cancer cell proliferation. A collection of oncology drugs was screened to identify compounds that inhibited the proliferation of ovarian cancer cells growing as monolayers or forming spheroids, on plastic and on a 3D microenvironment culture model of the omentum metastatic site, and also cells already in preformed spheroids. Target-based analysis of the pharmacological responses revealed that several classes of targets were more efficacious in cancer cells growing in the absence of the metastatic microenvironment, and other target classes were less efficacious in cancer cells in preformed spheres compared to forming spheroid cultures. These findings show that both the cellular context of the tumor microenvironment and cell adhesion mode have an essential role in cancer cell drug resistance. Therefore, it is important to perform screens for new drugs using model systems that more faithfully recapitulate the tissue composition at the site of tumor growth and metastasis.
Insights
The tumor microenvironment significantly impacts ovarian cancer drug resistance. Researchers found that drug efficacy varies based on the tumor microenvironment and cell structure, highlighting the need for advanced 3D models in drug screening.
Area of Science:
- Oncology
- Cell Biology
- Pharmacology
Background:
- The tumor microenvironment (TME) is crucial for tumor growth, metastasis, and drug resistance.
- Understanding the TME's influence on drug response is vital for developing effective cancer therapies.
Purpose of the Study:
- To investigate the effect of the ovarian cancer metastatic microenvironment on drug responses.
- To evaluate how different drug classes affect cancer cell proliferation within a 3D microenvironment model.
Main Methods:
- Utilized a multilayered 3D primary cell culture model simulating the human ovarian cancer metastatic microenvironment.
- Screened a panel of oncology drugs against ovarian cancer cells in various conditions: monolayers, spheroids, and a 3D omentum model.
Main Results:
- Drug efficacy varied significantly depending on the cellular context and cell adhesion mode.
- Certain drug targets were more effective in cells lacking the metastatic microenvironment, while others were less effective in preformed spheroids.
Conclusions:
- The tumor microenvironment and cell adhesion play critical roles in ovarian cancer drug resistance.
- Drug screening should employ models that accurately mimic the tissue composition of metastatic sites for better prediction of in vivo efficacy.
