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Updated: Feb 6, 2026
08:07
Isolation, Culture, and Differentiation of Bone Marrow Stromal Cells and Osteoclast Progenitors from Mice
Published on: January 6, 2018
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Multiplexed fluorescence microscopy reveals heterogeneity among stromal cells in mouse bone marrow sections
Karolin Holzwarth1, Ralf Köhler2, Lars Philipsen3
1Immune Dynamics, Charité - Universitätsmedizin, Berlin, Germany.
Summary
Bone marrow niches are complex. Multiepitope-ligand-cartography (MELC) reveals stromal cell networks and their interactions with B cells, aiding spatial analysis of these crucial microenvironments.
Area of Science:
- Hematology
- Immunology
- Cell Biology
- Tissue Engineering
Background:
- Bone marrow (BM) niches are structured microenvironments housing hematopoietic and stromal cells.
- These niches regulate hematopoietic stem cell pools, cell differentiation, and immunological memory.
- The cellular and molecular complexity of BM niches hinders a complete understanding of their composition.
Purpose of the Study:
- To develop and validate a method for analyzing the complex composition of bone marrow niches.
- To investigate the spatial relationships between stromal cells and immune cells within the bone marrow microenvironment.
- To reveal the heterogeneous expression of key molecules within the bone marrow stromal network.
Main Methods:
- Application of multiepitope-ligand-cartography (MELC) on mouse bone sections.
- Combination of multiplexed immunofluorescence histology with object-based segmentation algorithms.
- Validation of MELC and segmentation algorithms using flow cytometry and manual evaluation.
Main Results:
- MELC confirmed as a robust histological method for complex tissue analysis.
- Heterogeneous expression of leptin receptor (LpR), BP-1, and VCAM-1 identified in the stromal network.
- Quantification revealed preferential contact of B cell subsets and plasma cells with CXCL12-expressing stromal cell processes.
Conclusions:
- The developed MELC-based approach enables detailed spatial analysis of complex tissue structures like bone marrow niches.
- This method provides novel insights into the heterogeneous nature of stromal cells and their interactions with immune cells.
- Findings contribute to a better understanding of bone marrow microenvironmental regulation and immune cell homing.
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