血清源酸热稳定多肽促伤口愈合的研究

THE STUDY OF ENHANCEMENT EFFECT ON WOUND HEALING FROM ACID/HEAT STABLE PEPTIDES DERIVED FROM PIG SERUM

为了研究多肽促进伤口愈合的可能性，从猪血清中分离出一组酸、热稳定的多肽，分子量低于１８ｋｕ，无免疫原性、无毒副作用。用５０μｌ多肽制剂（５ｍｇ／ｍｌ）注入小鼠皮下埋置的聚乙烯醇海绵“死腔伤口”中，从致伤当日起，每日一次共５次；对照“死腔伤口”内注入５０μｌ牛血清白蛋白（５ｍｇ／ｍｌ）。伤后７，１０ｄ治疗组海绵中总ＤＮＡ、蛋白质及羟脯氨酸含量明显高于对照组，有显著差异（Ｐ＜０．０５），伤后１４ｄ两组间无差异（Ｐ＞０．０５）。体外实验发现，与对照基质１％胎牛血清１６４０液相比，含０．２％多肽制剂的对照基质可明显促进伤口修复细胞增殖，经统计学处理有显著差异（Ｐ＜０．０５）。结果证实，猪血清源分子量低于１８ｋｕ的酸、热稳定多肽，具有促伤口愈合的活性，直接促进伤口修复细胞生长是其发挥作用的机理之一。

It was reported in this article that a preparation of acid/heat stable peptides (AHSP) from pig serum with a molecular weight less than 18 ku a without antigenity and toxicity could exert enhancement effect on wound healing. Two pieces of polyvinyl alcohol (PVA) sponge implanted in rat dorsal subcutaneous pouchs of 20 mice were selected as the wound model. The subcutaneous pouch having one piece of sponge was taken as the experimental group and the other as the control. Injection of 50 μl of such peptide preparation into the test sponge was performed once a day from the time of injury on for 5 consecutive times, while 50 μl of BSA (5 mg/ml) into the control sponge in the same way. The levels of total DNA, protein and hydroproline in AHSP treated sponge were observed significantly higher than those in the control sponge on the 7th and 10th days after wounding (P<0.05). No significant difference was seen on the 14th postinjury day (P>0.05). The effect of AHSP on proliferation of wound fibroblast cultured in vitro was also dectected. In conclusion, such peptides derived from pig serum had the activity to accelerate wound healing without resultant excessive healing and its direct stimulation of the proliferation of wound fibroblast was probably one of the way which AHSP exerted its action.