摘要
目的:评价自制的羊脱细胞真皮基质(acellular dermal matrix,ADM)的免疫原性。方法:自制羊ADM,然后制成交联型ADM和未交联型ADM。将160只大鼠随机分配为4组:A组,于大鼠皮下埋植未交联型羊ADM;B组,于大鼠皮下埋植交联型羊ADM;C组,于大鼠皮下埋植异体皮;对照组,大鼠做皮下游离切开后无埋植物直接缝合。观察实验组埋植区外观变化,有无明显的排斥反应,取埋植区组织显微镜下观察局部的炎症反应情况。埋植后3 d及1,2,3周检测各组大鼠血清中白介素4(IL-4)和γ-干扰素(IFN-γ)的表达情况。结果:肉眼观察埋植区切口愈合良好,无明显的免疫排斥反应,羊ADM逐渐被吸收减少。镜下观察羊ADM与周围的组织连接较紧密,有一定量的炎性细胞浸润至羊ADM深处并有增多趋势,羊ADM结构逐渐被破坏。A,B,C组和对照组的IL-4和IFN-γ的表达在第3天差异无统计学意义(P>0.05)。3 d后对照组创面炎症反应消退,IL-4和IFN-γ的表达下降明显,而A,B,C组的表达仍然处于高位,体现出羊ADM的埋植使IL-4和IFN-γ的表达增高,与羊ADM引起的免疫反应有关。IL-4/IFN-γ的值显示:与对照组相比,3 d内A,B,C组差异无统计学意义(P>0.05),1周、2周、3周差异均有统计学意义(P<0.05),A,B,C组之间差异无统计学意义(P>0.05)。结论:自制的羊ADM移植后引起的排斥反应强度较低,具有较低的免疫原性;交联和未交联羊ADM对IL-4和IFN-γ的表达的影响无明显差异。
Objective： To evaluate the immunogenicity of self-made sheep skin acellular dermal matrix （ADM）. Methods： Both cross-linked and non-crosslinked ADMs were made after the sheep skin ADM was ready. A total of 160 healthy mice were then randomly divided into 4 groups. Group A, cross-linked ADM was implanted under skin; Group B, non-crosslinked ADM was implanted under skin; Group C, allosome skin was embedded under skin; Control group, without any implantation. Any visible changes in implantation region and any apparent rejection was recorded. Any symptoms of inflammatory reaction in implantation region were also observed by microscope. The levels of IL-4 and IFN-γ in serum were measured on the 3rd day, 1 week, 2 weeks and 3 weeks after the operation, respectively. Results： Visual study： wound healing in implantation regions were obvious, the immunologic rejection was not significant, and the sheep ADM was absorbed gradually by ambient tissues. Microscope results： the connection between the sheep ADM and surrounding tissues was very tight with infiltration of a few inflammatory cells into the depth of sheep ADM. The structure of sheep ADM was gradually destroyed by inflammatory cells. The levels of IL-4 and IFN-γ were not significant difference between the group of A, B or C and the control group on the 3rd day after the operation. The inflammatory reaction in implantation region of the control group degraded after 3 days, concomitant with a decrease in the levels of IL-4 and IFN-γ. But the levels of IL-4 and IFN-γ in the Group A, B or C remained at high level, suggesting the elevation of IL-4 and IFN-γ levels were related to the immunologic reaction by sheep ADM. The values of IL-4/IFN-γ were significant difference between the group A, B or C and the control group at the end of the 1st week, 2nd week, and 3rd week. However, there were not significantly different among the Group A, B and C. Conclusion： Sheep skin ADMs do not cause apparent rejection from mice after the transplantation because of the low immunogenicity. The cross-linked and non-crosslinked ADMs do not obviously affect the levels of IL-4 and IFN-γ.
出处
《中南大学学报（医学版）》
CAS
CSCD
北大核心
2016年第1期51-57,共7页
Journal of Central South University ：Medical Science
基金
内蒙古自然科学基金(2008040MS1115)~~
