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中华损伤与修复杂志(电子版) ›› 2021, Vol. 16 ›› Issue (02) : 97 -103. doi: 10.3877/cma.j.issn.1673-9450.2021.02.002

所属专题: 文献

论著

微孔化羊ADM复合hUCMSC促进创面修复的机制研究
杨霄彦1, 郝春光2, 李俊亮2, 符雪2, 王凌峰2,()   
  1. 1. 014010 包头,内蒙古医科大学第三附属医院病理科
    2. 014010 包头,内蒙古烧伤研究所
  • 收稿日期:2021-01-13 出版日期:2021-04-01
  • 通信作者: 王凌峰
  • 基金资助:
    内蒙古自治区自然科学基金(2014MS0823)

Study on the mechanism of microporous sheep ADM combined with hUCMSC in promoting wound healing

Xiaoyan Yang1, Chunguang Hao2, Junliang Li2, Xue Fu2, Lingfeng Wang2,()   

  1. 1. Department of Pathology, Third Affiliated Hospital of Inner Mongolia Medical University, Baotou 014010, China
    2. Inner Mongolia Institute of Burn Research, Baotou 014010, China
  • Received:2021-01-13 Published:2021-04-01
  • Corresponding author: Lingfeng Wang
引用本文:

杨霄彦, 郝春光, 李俊亮, 符雪, 王凌峰. 微孔化羊ADM复合hUCMSC促进创面修复的机制研究[J]. 中华损伤与修复杂志(电子版), 2021, 16(02): 97-103.

Xiaoyan Yang, Chunguang Hao, Junliang Li, Xue Fu, Lingfeng Wang. Study on the mechanism of microporous sheep ADM combined with hUCMSC in promoting wound healing[J]. Chinese Journal of Injury Repair and Wound Healing(Electronic Edition), 2021, 16(02): 97-103.

目的

探讨微孔化羊脱细胞真皮基质(ADM)复合人脐带间充质干细胞(hUCMSC)促进全层损伤皮肤创面愈合的治疗机制。

方法

将hUCMSC种植于微孔化羊ADM上共培养,形成复合生物敷料。选用72只裸鼠制作成皮肤全层损伤模型,按随机数字表法分为3组,每组24只,hUCMSC种植于微孔化羊ADM上治疗全层损伤创面组(hUCMSC+微孔化羊ADM组);羊ADM治疗全层损伤组(羊ADM组);碘伏纱布治疗全层损伤创面组(碘伏纱布组)。术后14、21、28 d检测各组裸鼠创面愈合率,运用qRT-PCR技术检测创面组织中Bax和Bcl-2的mRNA的表达,免疫组织化学染色检测创面愈合相关蛋白细胞胶原蛋白Ⅰ和血管内皮生长因子(VEGF)的表达。数据比较采用单因素方差分析和t检验。

结果

术后14 d, hUCMSC+微孔化羊ADM组的愈合率为(65.34±14.72)%,明显高于碘伏纱布组[(37.54±10.21)%],也高于羊ADM组[(49.08±11.16)%],差异均有统计学意义(t=19.52、14.72,P<0.05)。随着损伤创面的逐步愈合,术后28 d, hUCMSC+微孔化羊ADM组的愈合率为(98.63±15.41)%,明显高于羊ADM组[(81.74±16.27)%]和碘伏纱布组[(63.47±14.80)%],差异均有统计意义(t=-16.42、20.35,P<0.05)。Bax在hUCMSC+微孔化羊ADM组的创面组织中的表达显著降低,尤其在术后21 d的表达量为0.25±0.06,明显低于碘伏纱布组(0.53±0.16)和羊ADM组(0.41±0.12),差异均有统计学意义(t=3.52、-2.83,P<0.05)。Bcl-2在hUCMSC+微孔化羊ADM组的表达显著高于其他2组,尤其是在术后21 d的表达量为0.63±0.19,明显高于碘伏纱布组(0.34±0.09)和羊ADM组(0.46±0.13),差异均有统计学意义(t=5.31、-6.07,P<0.05)。免疫组织化学技术检测发现hUCMSC+微孔化羊ADM组胶原蛋白Ⅰ和VEGF的表达深棕色细胞虽然比羊ADM组和碘伏纱布组稍微有所增多,但是效果并不显著。

结论

hUCMSC+微孔化羊ADM复合敷料,通过携带hUCMSC更能促进皮肤全层损伤的愈合并减少凋亡细胞的产生。

Objective

To explore the therapeutic mechanism of microporous sheep acellular dermal matrix (ADM) combined with human umbilical cord mesenchymal stem cell(hUCMSC) to promote the healing of full-thickness wounds.

Methods

hUCMSC was co-cultured on microporous sheep ADM to form composite biological dressings. Seventy-two nude mice were selected to make a full-thickness skin injury model and randomly divide them into 3 groups, each group of 24. hUCMSC+ microporous sheep ADM group, sheep ADM group and iodophor gauze group. The wound healing rate of each group was detected at 14, 21 and 28 days after operation, qRT-PCR technique was used to detect the expression of Bax and Bcl-2 in wound tissue, and immunohistochemical technique was used to detect the expression of wound healing related proteins. Data were analyzed with one-way analysis of variance and t test.

Results

On the 14 days after operation, the healing rate of the hUCMSC+ microporous sheep ADM group was (65.34±14.72)%, which was significantly higher than that of the Iodophor gauze group (37.54±10.21)%, and also higher than that of the sheep ADM group [(49.08±11.16)%], the differences were statistically significant (t=19.52, 14.72; P<0.05). With the gradual healing of the wound, the healing rate of the hUCMSC+ microporous sheep ADM group was (98.63±15.41)% at 28 days after operation, which was significantly higher than that of the sheep ADM group [(81.74±16.27)%] and the Lodophor gauze group [(63.47±14.80)%], the differences were statistically significant (t=-16.42, 20.35; P<0.05). The expression of Bax in the wound tissue of the hUCMSC+ microporous sheep ADM group was significantly reduced, especially on the 21 days after operation, the expression level was 0.25±0.06, which was significantly lower than the Lodophor gauze group (0.53±0.16) and sheep ADM group (0.41±0.12), the differences were statistically significant(t=3.52, -2.83; P<0.05). The expression of Bcl-2 in the hUCMSC+ microporous sheep ADM group was significantly higher than that of the other two groups, especially at the 21 days after operation postoperative day, the expression level was 0.63±0.19, which was significantly higher than the Lodophor gauze group (0.34±0.09) and sheep ADM group (0.46±0.13), the differences were statistically significant (t=5.31, -6.07; P<0.05). Immunohistochemical detection showed that the expression of CollagenⅠand VEGF in hUCMSC+ microporous sheep ADM group was slightly more than that of sheep ADM group and iodophor gauze group, but the effect was not significant.

Conclusion

hUCMSC+ microporous sheep ADM composite dressing can promote the healing of full-layer skin injury and reduce the production of apoptotic cells by carrying hUCMSC.

表1 各组全层损伤裸鼠术后不同时间创面愈合率比较(%, ±s)
表2 各组全层损伤裸鼠创面组织中Bax的mRNA表达量比较(±s)
表3 各组全层损伤裸鼠创面组织中Bcl-2的mRNA表达量比较(±s)
图1 各组创面组织胶原蛋白Ⅰ免疫组织化学染色 (×400);A、B、C分别为术后14 d碘伏纱布组,羊ADM组和hUCMSC+微孔化羊ADM组;D、E、F分别为术后21 d碘伏纱布组,羊ADM组和hUCMSC+微孔化羊ADM组;G、H、I分别为术后28 d碘伏纱布组,羊ADM组和hUCMSC+微孔化羊ADM组;各组创面间质内均可看到胶原蛋白Ⅰ表达,hUCMSC+微孔化羊ADM组表达略强,碘伏纱布组表达略弱,但3个时间点各组内表达强度均相对一致,没有明显变化。ADM为脱细胞真皮基质;hUCMSC为人脐带间充质干细胞
图2 各组创面组织VEGF免疫组织化学染色 (×400)。A、B、C分别为术后14 d碘伏纱布组,羊ADM组和hUCMSC+微孔化羊ADM组,可见创面组织内成纤维细胞及血管内皮均表达VEGF,A(碘伏纱布组)表达最弱 ,C(hUCMSC+微孔化羊ADM组)表达增强;D、E、F分别为术后21 d碘伏纱布组,羊ADM组和hUCMSC+微孔化羊ADM组;术后21 d, 3组VEGF表达较术后14 d 3组表达略有增强;G、H、I分别为术后28 d碘伏纱布组,羊ADM组和hUCMSC+微孔化羊ADM组,术后28 d, 3组可见血管形成明显,VEGF表达较术后21 d与术后14 d有所升高,I示VEGF表达数量和强度均最高;VEGF为血管内皮生长因子;ADM为脱细胞真皮基质;hUCMSC为人脐带间充质干细胞
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