作者:
Chenzhi Lai, Guodong Song, Bo Zhao, Hongquan Wang, Bo Pan, Xiaoshuang Guo, Xiaolei Jin & Xianlei Zong.
英文摘要:
ABSTRACT
Introduction: Acellular dermal matrix (ADM) is commonly used to treat burn injuries and wounds. In this study, we aimed to analyze the structural and biomechanical characteristics of an ADM from human scars.
Methods: We randomly selected human mature scars, human proliferative scars, and human normal skin as experimental specimens. Split-thickness dermal grafts were obtained using a freehand graft knife. Samples were subjected to cell lysis to obtain ADMs. Structural analysis was performed via light microscopy, fluorescence microplate reader and scanning electron microscopy. Thereafter, human epithelial stem cells were incubated on these ADMs. Finally, the biomechanical characteristics of the ADMs were analyzed using a tensile machine.
Results: Normal skin ADM fibers were arranged in order, whereas proliferative scar ADM fibers were dense and disordered, and mature scar ADM fibers were porous and slightly disordered. The residual DNA of three ADM meet the residual DNA standard of biological material. After incubating human epithelial stem cells on ADMs, cells grew in an aggregated state in both normal skin ADMs and mature scar ADMs; however, cells adhered only on the surface of proliferative scar ADMs. No significant differences were observed in the Young’s modulus, relaxation slope, creep slope, creep, or maximum tensile stress among the three ADMs, although significant differences in stress-strain elongation and relaxation were noted.
Conclusions: Our findings showed that mature scar ADMs were similar to proliferative scar ADMs, showing a slight lag compared with normal skin ADMs, providing insights into the biomechanical features of these scar tissues.
Abbreviations: ADM: Acellular dermal matrix; H&E: Hematoxylin and eosin; PBS: Phosphate-buffered saline; SEM: Scanning electron microscopy
关键词:
Keywords:
Epithelial stem cells; biomechanical characteristics; scar tissue; scanning electron microscopy
JOURNAL OF BIOMATERIALS SCIENCE, POLYMER EDITION 2019, VOL. 30, NO. 9, 769-784
对一个家庭来说,最大的喜事之一,莫过于添...
截止目前,全球已有十余款新冠疫苗在多个国...
产品名称:新型冠状病毒(2019-nC...
正文...
南德 TÜV CE证书编号:No.G2...
南德 TÜV CE证书编号:No.G2...
南德 TÜV CE证书编号:No. G...
南德 TÜV CE证书编号:No.G2...
南德 TÜV CE证书编号:No. G...
南德 TÜV CE证书编号:No. G...
版权所有北京博辉瑞进生物科技有限公司 京ICP备16026579号 (京)-非经营性-2017-0030 京公网安备 11011502006176号 (京)网药械信息备字(2022)第00096号