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Updated: May 28, 2026

In Vivo Osteo-organoid Approach for Harvesting Therapeutic Hematopoietic Stem/Progenitor Cells
Published on: February 16, 2024
Osteoprotegerin positively regulates hematopoietic progenitor cells
Eric Schweikle1, Tina Baessler, Sedat Yildirim
1University of Tübingen, Medical Center, Department of Hematology, Oncology and Immunology, Germany.
Abstract:
Osteoprotegerin (OPG), the soluble decoy receptor of RANKL is released by bone marrow osteoblasts and plays an important role in physiological osteoblastogenesis and pathological bone disease. In earlier studies, we have shown that generated stromal cell lines from the aorta-gonad-mesonephros (AGM)-region serving as good supporters of murine and human hematopoietic progenitor cell (HPC) expansion highly express OPG detected by microarray analysis. Here, we investigated the role of OPG to HPC expansion in vitro. Addition of OPG leads to an enhanced expansion of HPC in liquid culture. In addition, progenitor cell function, measured by colony and cobblestone formation, was increased. The observed effects were partially antagonized by addition of RANKL. In conclusion, these findings suggest an important role of OPG maintaining progenitor cell function in the osteoblastic niche.
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