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The effect of low intensity laser therapy on wound healing in Streptozotocin-induced diabetic rats

机译:低强度激光治疗对链脲佐菌素诱导的糖尿病大鼠伤口愈合的影响

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Diabetes Mellitus is a condition that results in a delay of the wound healing process, that is associated with an insufficient production of collagen, a decrease of the amount of collagen fibrils and deficient blood flow in the wound area. It is suggested that Low Intensity Laser Therapy acts by improving wound healing in normal organisms, accelerating tissue regeneration. The aim of this work was to investigate the biostimulatory effect of the HeNe laser irradiation, at 632.8 nm, on wound healing in 15 male rats suffering from diabetes induced by Streptozotocin, compared to 15 control diabetic animals. Irradiation parameters were: laser power of 15mW, exposition time of 17 s., irradiated area of 0.025 cm~2 and laser energy density of 10 J/cm~2. Full-thickness skin squared samples, with 5 mm of non-injured tissue around the wound, were obtained at 4, 7 and 15 days after wounding procedure (5 treated and 5 control animals each time). The histopathologic analysis performed by haematoxylin-eosin staining. Results suggested that the irradiation of diabetic rats was efficient for wound healing. Treated group presented better quality of the wound tissues by the macroscopic observation than control group and the microscopic analysis demonstrated that treated animals had better histopathologic evaluation than non treated.
机译:糖尿病是导致伤口愈合过程延迟的病症,其与胶原蛋白产生不足,胶原蛋白原纤维数量减少以及伤口区域的血流不足有关。建议低强度激光治疗通过改善正常生物体的伤口愈合,加速组织再生来发挥作用。这项工作的目的是研究与15例对照糖尿病动物相比,HeNe激光照射在632.8 nm处对15例链脲佐菌素诱导的糖尿病雄性大鼠伤口愈合的生物刺激作用。辐照参数为:激光功率为15mW,曝光时间为17 s。,辐照面积为0.025 cm〜2,激光能量密度为10 J / cm〜2。在伤口手术后第4、7和15天获得全厚度的皮肤平方样品,在伤口周围有5 mm的未受伤组织(每次治疗5只,对照组5只)。通过苏木精-伊红染色进行组织病理学分析。结果表明,糖尿病大鼠的照射对伤口愈合有效。通过肉眼观察,治疗组的伤口组织质量优于对照组,并且显微镜分析表明,治疗组的动物病理学评估优于未治疗组。

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