Stability of prostaglandin E2 (PGE2) embedded in poly-d,l-lactide-co-glycolide microspheres: a pre-conditioning approach for tissue engineering applications
Stability of prostaglandin E2 (PGE2) embedded in poly-d,l-lactide-co-glycolide microspheres: a pre-conditioning approach for tissue engineering applications
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嵌入聚-d,l-丙交酯-乙交酯微球中的前列腺素 E2 (PGE2) 的稳定性:组织工程应用的预处理方法
DOI:
10.1007/s10856-008-3678-9
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发表时间:
2009
期刊:
影响因子:
--
通讯作者:
Brochhausen C.
中科院分区:
文献类型:
--
作者:
Watzer B;Zehbe R;Halstenberg S;Kirkpatrick C.J;Brochhausen C.
Prostaglandin E2(PGE2) is involved in angiogenesis, bone repair and cartilage metabolism. Thus, PGE2might represent a suitable signaling molecule in different tissue engineering applications. PGE2also has a short half-life time. Its incorporation into poly-d,l-lactide-co-glycolide (PLGA) microspheres was demonstrated in a previous study. However, the stability of bioactive PGE2in these microspheres is unknown. With an adjusted mass spectrometry assay we investigated the amount of incorporated PGE2and the stability of PGE2in conventional cell culture medium and in PLGA microspheres. The stability of PGE2was closely pH dependent. Strong acidic or basic environments reduced the half-life from 300 h (pH 2.6–4.0) to below 50 h at pH 2.0 or pH 8.8. The half-life of PGE2incorporated into poly-d,l-lactide-co-glycolide increased drastically to 70 days at 37°C and to 300 days at 8°C. Analysis with scanning electron microscopy (SEM) and atomic force microscopy (AFM) demonstrated a distinct nanostructure of the polymeric phase and both nano- and microporosity.
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DOI:
10.5301/jabb.2008.4520
发表时间:
2008
期刊:
Journal of applied biomaterials & biomechanics : JABB
影响因子:
--
作者:
Christoph Brochhausen;Rolf Zehbe;Ulrich Gross;Helmut Schubert;C. Kirkpatrick
通讯作者:
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DOI:
10.1002/jbm.820050207
发表时间:
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期刊:
Journal of biomedical materials research
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1993-01-01
期刊:
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH
影响因子:
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作者:
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通讯作者:
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DOI:
10.1046/j.1523-1755.2000.00861.x
发表时间:
2000
期刊:
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作者:
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通讯作者:
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影响因子:
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通讯作者:
Ronald E. Unger