Chinese Journal of Tissue Engineering Research ›› 2021, Vol. 25 ›› Issue (16): 2528-2534.doi: 10.3969/j.issn.2095-4344.3147
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Li Jie1, Xu Jianzhen1, Hu Ping1, Lei Qiqi1, Zhang Wenning1, Ao Ningjian1, 2
Received:
2020-04-25
Revised:
2020-04-27
Accepted:
2020-05-22
Online:
2021-06-08
Published:
2021-01-07
Contact:
Ao Ningjian, Researcher, Master’s and doctoral supervisor, College of Life Science and Technology, Jinan University, Guangzhou 510632, Guangdong Province, China; Key Laboratory of Biomaterials of Guangdong Education Department, Guangzhou 510632, Guangdong Province, China
About author:
李洁,女,1997年生,云南省西双版纳傣族自治州勐海县人,暨南大学在读硕士,主要从事生物医用材料研发与创伤修复研究。
许楗桢,男,1993年生,广西壮族自治区南宁市人,汉族,暨南大学毕业,硕士,工程师,主要从事新型医用高分子材料与医疗器械产品研发工作。
Supported by:
CLC Number:
Li Jie, Xu Jianzhen, Hu Ping, Lei Qiqi, Zhang Wenning, Ao Ningjian . Preparation and performance evaluation of carboxymethyl chitosan/oxidized glucomannan/Panax notoginseng compound sponge dressing for chronic wound[J]. Chinese Journal of Tissue Engineering Research, 2021, 25(16): 2528-2534.
2.6 复合海绵对3T3细胞增殖影响分析 作为慢性伤口敷料必须具备的功能就是可以促进表皮成纤维细胞的生长,以此加速创面的愈合速度,因此通常采用成纤维细胞的增殖情况作为判断伤口敷料有效性依据。图7为各组复合海绵对3T3细胞增殖的影响对比图,可以看到各组复合海绵1,2,3 d的3T3细胞增殖率均超过90%,相比于CMCS海绵,CMCS/OKGM复合海绵可明显促进3T3细胞的增殖;在CMCS/OKGM复合海绵的基础上分别加入2%,6%,10%的PNS,3T3细胞增殖率有显著提升,几乎呈梯度式增长且增殖率均大于95%,说明在CMCS/OKGM复合海绵的基础上加入10%的PNS,能显著提高复合海绵促进3T3细胞增殖的能力,从而对伤口的愈合起到促进作用。"
2.7 复合海绵的抑菌效果分析 图8为各组复合海绵抗菌能力测试结果,图中看到所制材料对2种代表性菌种的抑菌圈直径均大于7 mm,表现出明显的抑菌作用,其中CMCS/OKGM是CMCS在体系中所占比例最高的材料,由于CMCS的优良抑菌作用,其对大肠杆菌和金黄色葡萄球菌均产生超过9 mm的抑菌圈;随着PNS的加入,可以观察到CMCS/OKGM/PNS-2复合海绵对2种代表性菌种的抑菌圈均在8 mm左右,略弱于CMCS/OKGM复合海绵的抑菌效果,该两种复合海绵对大肠杆菌的抑菌性均略强于对金黄色葡萄球菌的抑菌性;CMCS/OKGM/PNS-6复合海绵对2种代表性菌种的抑菌效果弱于CMCS/OKGM、CMCS/OKGM/PNS-2复合海绵,抑菌圈均略小于8 mm; CMCS/OKGM/PNS-10复合海绵对2种代表性菌种所产生的抑菌圈在7.0-8.0 mm间,并且很清晰,说明其与CMCS/OKGM/PNS-2、CMCS/OKGM/PNS-6复合海绵相比有极佳的抑菌效果,符合医用敷料的抗菌需求。各组复合海绵的抑菌圈直径见表1。 "
2.8 复合海绵急性全身毒性实验结果 KM小鼠在注射不同材料浸提液1周内生理活动都正常,无中毒或死亡现象发生,且体质量稍有增长,故判定所制材料无急性全身毒性反应,具有生物安全性。 腹腔注射材料浸提液后1,3 ,7 d的KM小鼠体质量变化记录表如表2所示,第1天各组材料浸提液对KM小鼠体质量影响不大;第3,7天时各组KM小鼠体质量日渐增加,生理盐水组与CMCS/OKGM/PNS-2组、CMCS/OKGM/PNS-6组体质量增长结果相似;第7天时,CMCS/OKGM组体质量增长最少;CMCS/OKGM/PNS-10组第3天时体质量增长最少,第7天时体质量增长最多。在复合海绵对3T3细胞增殖影响结果中也表明了CMCS/OKGM/PNS-10复合海绵对3T3细胞的增殖效果最佳,该两项测试结果的高度吻合,证明CMCS/OKGM/PNS-10复合海绵具有极好的生物安全性。 "
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