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Related Experiment Video

Updated: Jun 27, 2026

Real-time Imaging of Myeloid Cells Dynamics in ApcMin/+ Intestinal Tumors by Spinning Disk Confocal Microscopy
05:21

Real-time Imaging of Myeloid Cells Dynamics in ApcMin/+ Intestinal Tumors by Spinning Disk Confocal Microscopy

Published on: October 6, 2014

Visualizing stromal cell dynamics in different tumor microenvironments by spinning disk confocal microscopy.

Mikala Egeblad1, Andrew J Ewald, Hanne A Askautrud

  • 1Department of Anatomy, University of California, San Francisco, 513 Parnassus Avenue, San Francisco, CA 94143, USA. mikala.egeblad@ucsf.edu

Disease Models & Mechanisms
|December 3, 2008
PubMed
Summary

Researchers visualized stromal cell behavior in the tumor microenvironment using multicolor imaging. They discovered distinct migration patterns influenced by hypoxia and identified specific myeloid cell subpopulations with varying motility.

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Area of Science:

  • Oncology
  • Immunology
  • Cell Biology

Background:

  • The tumor microenvironment (TME) comprises stromal cells and extracellular factors that interact with carcinoma cells.
  • Understanding stromal cell dynamics within the TME is crucial for cancer research and therapeutic development.

Purpose of the Study:

  • To develop and apply multicolor imaging techniques for analyzing stromal cell behavior in live mouse tumor microenvironments.
  • To investigate the influence of hypoxia on stromal cell migration within the TME.
  • To characterize distinct subpopulations of myeloid cells based on their motility and markers.

Main Methods:

  • Development and application of multicolor imaging techniques for real-time analysis of stromal cell populations in intact tumors.
  • In vivo observation of regulatory T-lymphocytes (Tregs), dendritic-like cells, myeloid cells, and carcinoma-associated fibroblasts.
  • Experimental manipulation including acute systemic hypoxia and fluorescent labeling (dextran uptake, anti-Gr1 antibodies) to define myeloid cell subsets.

Main Results:

  • Regulatory T-lymphocytes (Tregs) were observed migrating near blood vessels.
  • Stromal cells (dendritic-like cells, myeloid cells, fibroblasts) showed higher motility at the tumor periphery compared to the tumor core.
  • Acute hypoxia halted Treg migration but not myeloid cell migration; myeloid cells were further classified into low-motility (macrophage markers) and high-motility (vessel-patrolling) subpopulations.

Conclusions:

  • Multicolor imaging provides real-time combinatorial analysis of cell populations within intact tumors, applicable beyond cancer research.
  • Stromal cell migration patterns are spatially regulated within the TME and influenced by environmental factors like hypoxia.
  • Distinct myeloid cell subpopulations within the TME exhibit differential motility and characteristics, suggesting specialized roles.