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Diabetologia
Published in: Diabetologia 4/2011

01-04-2011 | Article

Defective recruitment, survival and proliferation of bone marrow-derived progenitor cells at sites of delayed diabetic wound healing in mice

Authors: M. Albiero, L. Menegazzo, E. Boscaro, C. Agostini, A. Avogaro, G. P. Fadini

Published in: Diabetologia | Issue 4/2011

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Abstract

Aims/hypothesis

Bone marrow (BM)-derived endothelial progenitor cells (EPC) promote tissue healing and angiogenesis, whereas altered EPC biology may favour diabetic complications. We tested the hypothesis that diabetes impairs the contribution of BM-derived cells at sites of wound healing.

Methods

Four weeks after induction of diabetes in C57BL/6 mice, hindlimb skin wounds were created and monitored by digital imaging and histology. Circulating EPCs were quantified by flow cytometry before and after wounding. In separate experiments, bone marrow from C57BL/6 mice constitutively producing green fluorescent protein (GFP) was transplanted into myeloablated wild-type mice before induction of diabetes. We quantified proliferation, apoptosis and endothelial differentiation of tissue GFP+ cells. Net recruitment of GFP+ cells was estimated by correcting the number of tissue GFP+ cells at each time point for basal levels, apoptosis and proliferation rates.

Results

Diabetes delayed wound healing, with reduced granulation tissue thickness and vascularity, and increased apoptosis. Circulating EPC levels were not modified by 4 week diabetes and/or skin wounding. BM-derived EPCs (GFP+vWf+ [von Willebrand factor] cells) within the granulation tissue were significantly reduced in diabetic compared with control mice. BM-derived GFP+ cells showed increased apoptosis and decreased proliferation in diabetic versus non-diabetic wound tissues. Estimated net recruitment of BM-derived GFP+ cells was reduced on day 1 after wounding in diabetic mice.

Conclusions/interpretation

Diabetic-delayed wound healing was associated with defective recruitment, survival and proliferation of BM-derived progenitor cells. Local treatments aimed at restoring EPC homing and survival might improve tissue healing in diabetes.
Appendix
Available only for authorised users
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Metadata
Title
Defective recruitment, survival and proliferation of bone marrow-derived progenitor cells at sites of delayed diabetic wound healing in mice
Authors
M. Albiero
L. Menegazzo
E. Boscaro
C. Agostini
A. Avogaro
G. P. Fadini
Publication date
01-04-2011
Publisher
Springer-Verlag
Published in
Diabetologia / Issue 4/2011
Print ISSN: 0012-186X
Electronic ISSN: 1432-0428
DOI
https://doi.org/10.1007/s00125-010-2007-2

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