Diabetes mellitus induces bone marrow microangiopathy

Atsuhiko Oikawa, Mauro Siragusa, Federico Quaini, Giuseppe Mangialardi, Rajesh G. Katare, Andrea Caporali, Jaap D. Van Buul, Floris P J Van Alphen, Gallia Graiani, Gaia Spinetti, Nicolle Kraenkel, Lucia Prezioso, Costanza Emanueli, Paolo Madeddu

Research output: Contribution to journalArticlepeer-review

Abstract

Objective-The impact of diabetes on the bone marrow (BM) microenvironment was not adequately explored. We investigated whether diabetes induces microvascular remodeling with negative consequence for BM homeostasis. Methods and Results-We found profound structural alterations in BM from mice with type 1 diabetes with depletion of the hematopoietic component and fatty degeneration. Blood flow (fluorescent microspheres) and microvascular density (immunohistochemistry) were remarkably reduced. Flow cytometry verified the depletion of MECA-32 endothelial cells. Cultured endothelial cells from BM of diabetic mice showed higher levels of oxidative stress, increased activity of the senescence marker β-galactosidase, reduced migratory and network-formation capacities, and increased permeability and adhesiveness to BM mononuclear cells. Flow cytometry analysis of lineage c-Kit Sca-1 cell distribution along an in vivo Hoechst-33342 dye perfusion gradient documented that diabetes depletes lineage c-Kit Sca-1 cells predominantly in the low-perfused part of the marrow. Cell depletion was associated to increased oxidative stress, DNA damage, and activation of apoptosis. Boosting the antioxidative pentose phosphate pathway by benfotiamine supplementation prevented microangiopathy, hypoperfusion, and lineage c-Kit Sca-1 cell depletion. Conclusion-We provide novel evidence for the presence of microangiopathy impinging on the integrity of diabetic BM. These discoveries offer the framework for mechanistic solutions of BM dysfunction in diabetes.

Original languageEnglish
Pages (from-to)498-508
Number of pages11
JournalArteriosclerosis, Thrombosis, and Vascular Biology
Volume30
Issue number3
DOIs
Publication statusPublished - Mar 2010

Keywords

  • Diabetes
  • Microangiopathy
  • Oxidative stress
  • Progenitor cells

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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