The inflammatory cell influx and cytokines changes during transition from acute inflammation to fibrous repair around implanted materials

被引:122
作者
Gretzer, Christina [1 ]
Emanuelsson, Lena
Liljensten, Elisabeth
Thomsen, Peter
机构
[1] Univ Gothenburg, Sahlgrenska Acad, Inst Surg Sci, SE-40530 Gothenburg, Sweden
[2] Artimplant AB, Vastra Frolunda, Sweden
关键词
biocompatibility; cytokine; poly(urethane urea); polystyrene; titanium; wound healing;
D O I
10.1163/156856206777346340
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
The inflammatory and fibrous responses in a subcutaneous rat model were evaluated around degradable polyurethane urea (PUUR; Artelon((R))), with titanium and tissue culture polystyrene (PS) discs having different surface chemical properties but similar surface topography. Cytokines, viability, cellular response, differentiation of cells and fibrous capsule formation and vascularization was investigated after 1, 7 and 21 days of implantation. The exudates retrieved from the pockets were analysed with respect to the total cell numbers, the proportions of cell types, the differentiation of monocytes/macrophages (ED1, ED2), the DNA content and the viability (LD, Trypan blue). Tumour necrosis factor alpha ((h)TNF-alpha) and interleukin-10 ((h)IL-10) were quantified by ELISA. The number of blood vessels, blood vessel luminal area, blood vessel distribution and the fibrous capsule thickness were analysed. The highest number of cells in the exudates around all implants was detected during the early phase of healing (1-7 days). The proportion of ED2-positive cells in the exudates increased from 2-8% at 1 day to 43-56% at 21 days. The levels of TNF-alpha were low with a decrease at 7 days. After 21 days high amounts of IL-10 in the exudates were detected, in particular around PUUR. This study shows that the transition from inflammation to repair (1-21 days) around PUUR, Ti and PS materials was characterized by a decrease in inflammatory cell influx, an increasing proportion of ED2-expressing macrophages, a biphasic TNF-alpha secretion, an increase of IL-10 and a fibrous capsule formation similar to all materials tested.
引用
收藏
页码:669 / 687
页数:19
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