Previous investments have shown that chitin , chitosan or their oligosaccharides were able to stimulate immune system . either intravenously or intraperitoneal administered to mouse , these polysacca - rides or oligosaccharides were able to increase polymorphonuclear cells in blood or peritoneal exudate , and activated macrophages , t lymphocytes and nk cells of mouse 将这些多糖、寡糖经腹腔或静脉给予小鼠，可以使其腹腔渗出液及外周血中多型核白细胞增多，巨噬细胞、脾脏t淋巴细胞、 nk细胞等活性增强。
P - selectin was negative both in the normal skin and in the postmortem damage group . in the wound specimens aged 1h , we detected expression of icam - 1 in the epidermis , a strong positive staining was observed in 3 hours after wound , and continued to 1 days from the skin was injured after incised , weak staining were showed on epiderm of the injury margin after 3 days incised , and disappeared in 5 days . expression of icam - 1 was also detectable in polymorphonuclear cells ( pmns ) in the wound specim - ents aged 3h 本实验研究证明，皮肤损伤后表皮层icam1表达增高，其表达呈现一定时间规律性，在损伤后lh ，损伤边缘表皮细胞即呈黄褐色染色，伤后3h组， icam一二在表皮层中呈深黄褐色，并一直持续至伤后id ，伤后3d组icam 1染色转淡，呈黄褐色染色，在伤后sd及7d组， 1 m一二表达基本恢复至正常状态。
