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Published in: Journal of Artificial Organs 4/2012

01-12-2012 | Original Article

Delivery system for autologous growth factors fabricated with low-molecular-weight heparin and protamine to attenuate ischemic hind-limb loss in a mouse model

Authors: Shingo Nakamura, Megumi Takikawa, Masayuki Ishihara, Takefumi Nakayama, Satoko Kishimoto, Susumu Isoda, Yuichi Ozeki, Masahiro Sato, Tadaaki Maehara

Published in: Journal of Artificial Organs | Issue 4/2012

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Abstract

Frozen and thawed platelet-rich plasma (PRP) contains high concentrations of various growth factors, such as fibroblast growth factor (FGF)-2, vascular endothelial growth factor, and hepatocyte growth factor. We previously reported that low-molecular-weight heparin/protamine microparticles (LH/P MPs) are useful as biodegradable carriers for the controlled release of FGF-2. In this study, we examined the ability of PRP/LH/P MPs to prevent limb loss in an induced ischemic hind-limb model that used adult BALB/c-nu/nu male mice. One day after inducing ischemia, intramuscular injections of a PRP/LH/P MPs solution were administered into several sites of the ischemic hind limb. Seven days and onward after the injections, the PRP/LH/P MPs-treated and PRP-treated groups recovered from ischemia, as reflected by the improved oxygen saturation. In the PRP-treated group, however, the level of recovery of oxygen saturation after ischemia decreased after 14 days. From the 21st day onward, there was a significant difference between those two groups. In the LH/P MPs-treated group, a partial recovery occurred only in the early period. The saline-treated group (i.e., the control) and the noninjection group (i.e., ischemia only) exhibited no recovery. The limb survival rate at 1 year in the ischemia-induced mice injected with PRP/LH/P MPs was approximately 25 % (two of eight mice) but was absent in the other groups.
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Metadata
Title
Delivery system for autologous growth factors fabricated with low-molecular-weight heparin and protamine to attenuate ischemic hind-limb loss in a mouse model
Authors
Shingo Nakamura
Megumi Takikawa
Masayuki Ishihara
Takefumi Nakayama
Satoko Kishimoto
Susumu Isoda
Yuichi Ozeki
Masahiro Sato
Tadaaki Maehara
Publication date
01-12-2012
Publisher
Springer Japan
Published in
Journal of Artificial Organs / Issue 4/2012
Print ISSN: 1434-7229
Electronic ISSN: 1619-0904
DOI
https://doi.org/10.1007/s10047-012-0658-0

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