Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz

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"Köpfe" der aktuellen Meldungen:

Nina Höller

Nariae Baik-Schneditz

Bernhard Schwaberger

Lukas Peter Mileder

Niels Hammer

Gerhard Pichler

Roland Malli

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SHR Neuro Krebs Kardio Lipid Stoffw Microb

Chen, Y; Jacamo, R; Shi, YX; Wang, RY; Battula, VL; Konoplev, S; Strunk, D; Hofmann, NA; Reinisch, A; Konopleva, M; Andreeff, M.
Human extramedullary bone marrow in mice: a novel in vivo model of genetically controlled hematopoietic microenvironment.
Blood. 2012; 119(21):4971-4980 Doi: 10.1182/blood-2011-11-389957 [OPEN ACCESS]
Web of Science PubMed FullText FullText_MUG

Co-Autor*innen der Med Uni Graz: Hofmann Nicole; Reinisch Andreas; Strunk Dirk
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Abstract:: The interactions between hematopoietic cells and the bone marrow (BM) microenvironment play a critical role in normal and malignant hematopoiesis and drug resistance. These interactions within the BM niche are unique and could be important for developing new therapies. Here, we describe the development of extramedullary bone and bone marrow using human mesenchymal stromal cells and endothelial colony-forming cells implanted subcutaneously into immunodeficient mice. We demonstrate the engraftment of human normal and leukemic cells engraft into the human extramedullary bone marrow. When normal hematopoietic cells are engrafted into the model, only discrete areas of the BM are hypoxic, whereas leukemia engraftment results in widespread severe hypoxia, just as recently reported by us in human leukemias. Importantly, the hematopoietic cell engraftment could be altered by genetical manipulation of the bone marrow microenvironment: Extramedullary bone marrow in which hypoxia-inducible factor 1α was knocked down in mesenchymal stromal cells by lentiviral transfer of short hairpin RNA showed significant reduction (50% ± 6%; P = .0006) in human leukemic cell engraftment. These results highlight the potential of a novel in vivo model of human BM microenvironment that can be genetically modified. The model could be useful for the study of leukemia biology and for the development of novel therapeutic modalities aimed at modifying the hematopoietic microenvironment.
Find related publications in this database (using NLM MeSH Indexing): Animals -; Bone Marrow Cells - cytology; Bone Marrow Cells - metabolism; Bone Marrow Cells - physiology; Bone Marrow Transplantation - methods; Bone Marrow Transplantation - physiology; Cells, Cultured -; Cellular Microenvironment - genetics; Cellular Microenvironment - physiology; Hematopoiesis, Extramedullary - genetics; Hematopoiesis, Extramedullary - physiology; Humans -; Hypoxia-Inducible Factor 1, alpha Subunit - genetics; Hypoxia-Inducible Factor 1, alpha Subunit - metabolism; Interleukin Receptor Common gamma Subunit - genetics; Mice -; Mice, Inbred NOD -; Mice, SCID -; Mice, Transgenic -; Models, Animal -; Osteogenesis - genetics; Osteogenesis - physiology; Species Specificity -; Transplantation, Heterotopic -