Related Experiment Video
Updated: Sep 9, 2025
Microfluidic Co-Culture Models for Dissecting the Immune Response in in vitro Tumor Microenvironments
Published on: April 30, 2021
Study of the Reciprocal Interaction Between Tumor Cells and Macrophages Based on the Biomimic Microfluidic Device
Shuxuan Jin1, Qian Wu1, Shiqi Chang2
1Laboratory of Medicine, Dalian Medical University, Dalian.
Insights
This study developed a 3D microfluidic chip to model glioma's immune microenvironment. It revealed that macrophages enhance glioma cell invasion and shift to a tumor-supportive M2 phenotype, offering insights into metastasis.
Area of Science:
- Biomedical Engineering
- Cancer Biology
- Immunology
Background:
- Tumor-macrophage interactions are critical in cancer progression, influencing angiogenesis, immune suppression, and matrix remodeling.
- Understanding the glioma microenvironment is essential for developing effective cancer therapies.
- Tumor-associated macrophages (TAM) play a significant role in promoting glioma invasion and metastasis.
Purpose of the Study:
- To develop a biomimetic microfluidic chip simulating the glioma immune microenvironment.
- To investigate the dynamic interactions between glioma cells and macrophages in a 3D matrix.
- To explore the molecular mechanisms underlying tumor-macrophage reciprocal signaling and its effect on invasion.
Main Methods:
- Co-culture of glioma cells (as spheroids) and macrophages within a 3D collagen I matrix on a microfluidic chip.
- Real-time monitoring of macrophage morphology, glioma spheroid invasion, and cell-cell interactions.
- In situ isolation of cell types for molecular analysis (Western blotting, qPCR).
Main Results:
- Glioma cell spheroids exhibited significantly enhanced invasiveness in the presence of macrophages.
- Macrophages altered their phenotype from M0 to M2 (tumor-supportive) when influenced by glioma cells.
- The study explored the molecular mechanisms driving this reciprocal tumor-macrophage interaction.
Conclusions:
- The developed 3D microfluidic chip serves as a valuable tool for studying the glioma microenvironment.
- Macrophage presence and phenotype modulation are key drivers of glioma cell invasion.
- This model provides deeper insights into glioma metastasis mechanisms, particularly the role of TAM.
Abstract:
Tumor-macrophage interactions play a key role in various physiological and pathological processes, such as angiogenesis, immune suppression, and extracellular matrix remodeling. In this study, a biomimetic microfluidic chip was developed to simulate the immune microenvironment of glioma through the co-culture of glioma cells and macrophages in a three-dimensional (3D) matrix. Glioma cells were embedded in collagen I solution after forming spheroids in the microwell array chip and subsequently co-cultured with macrophages in different channels. This chip enabled the real-time monitoring of morphological changes in macrophages, the invasion of glioma cell spheroids, and molecular interactions between different cell types. Two distinct cell types could be extracted and isolated in situ for subsequent molecular biological detection, such as Western blotting or qPCR. The results demonstrated that glioma cell spheroids significantly enhanced invasiveness in the presence of macrophages. Moreover, the phenotype of macrophages altered from M0 to M2 (tumor-supportive) under the influence of tumor cells. The molecular mechanism mediating this reciprocal process was extensively explored. It is believed that this 3D microfluidic tumor model could serve as a useful tool for studying the biological properties of the glioma microenvironment. In addition, a more comprehensive understanding of the mechanisms involved in glioma metastasis could be obtained, especially of how tumor inflammatory cells, including tumor-associated macrophages (TAM), affect invasion process.
