ArticleArteriosclerosis, thrombosis, and vascular biology2025
Visualizing Vascular Bone Marrow Niche Alterations in Diabetes.
Article in Arteriosclerosis, thrombosis, and vascular biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundDiabetes is characterized by chronic hyperglycemia that leads to systemic vascular complications. Hyperglycemia impairs endothelial function and promotes vascular inflammation, resulting in leukocytosis, altered hematopoiesis, and cardiovascular complications. Bone marrow endothelial cells play a pivotal role in regulating myeloid progenitor cells and leukocyte trafficking. However, the effects of diabetes on the structure and function of bone marrow vasculature remain poorly understood. To address this, we used a multiscale imaging approach integrating intravital microscopy, dynamic contrast-enhanced magnetic resonance imaging, and multispectral optoacoustic tomography to investigate diabetes-induced vascular changes in the bone marrow.
methodsDiabetes was induced in C57BL/6J female mice using streptozotocin. Flow cytometry and histology characterized bone marrow myeloid progenitors, blood leukocytes, and bone marrow endothelial cell populations, as well as hypoxia. Intravital microscopy was used to visualize vascular density, permeability, and sprouting angiogenesis in the calvarial marrow. Dynamic contrast-enhanced magnetic resonance imaging quantified vascular density and permeability in the femoral marrow, while multispectral optoacoustic tomography assessed hemoglobin oxygenation in the calvarial marrow.
resultsHyperglycemia significantly increased myelopoiesis, leading to elevated leukocytosis driving diabetic inflammation. Flow cytometry and histology revealed increased bone marrow endothelial cell numbers (
conclusionsThis study demonstrates that diabetes induces profound vascular remodeling and hypoxia in the bone marrow, reshaping the hematopoietic niche and driving myelopoiesis and leukocytosis. By validating dynamic contrast-enhanced magnetic resonance imaging and multispectral optoacoustic tomography as noninvasive translational tools, coupled with intravital microscopy, we provide a comprehensive framework for exploring novel therapies targeting bone marrow vasculature to mitigate inflammation-driven outcomes in diabetes.
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