In order to investigate the influence of Danshen on the viability of skin from II degree burned and the effect of Danshen on the wound healing, 20 rabbits having a wound from second degree burn were divided into two groups randomly. The experimental group was treated with Danshen and the control was treated with normal saline. Then succinate dehydrogenase, SDH activity, malonyl dialdehyde, MDA concentration, water content and morphological change of wound tissue were observed dynamically. The results showed that the levels of SDH activity in the experimental group were significantly higher than that of the control group (P lt; 0.05), the MDA concentration and water content of the former were lower than that of the latter (P lt; 0.05) and the morphological examination showed that the wound healing process of former were better than that of the latter. The conclusion was Danshen had a beneficial effect on the viability of the burned skin and this effect was due to its protecting the residual epithelial cells of the burned skin.
OBJECTIVE: To explore the effect of Fas/Apo-1 and Bcl-2 gene expression on mechanism of scar formation. METHODS: Immunohistochemical method was applied to defect the expression of Fas and Bcl-2 protein in fibroblasts from 10 cases with normal skin, 10 cases with hypertrophic scar and 10 cases with keloid. RESULTS: The positive expression rate of Bcl-2 protein in keloid was 83.2%, significantly higher than that in hypertrophic scar (38.6%), (P lt; 0.01), and the positive expression rate in hypertrophic scar and keloid was higher than that in normal skin (6.78%), (P lt; 0.01). But the positive expression rate of Fas/Apo-1 protein was 78.4% in normal skin 80.4% in hypertrophic scar, 84.4% in keloid respectively, which showed no significant difference among them (P gt; 0.05). CONCLUSION: Bcl-2 gene but Fas gene may take part in the formation of pathologic scar.
In order to study the biological properties of fibroblasts isolated from different tissues. The fibroblasts from normal skin, hypertrophic scar and keloid were cultured, respectively, in vitro, and their morphologies and growth kinetics were compared. The results revealed that although fibroblasts in keloid were irregularly arranged, crisscross and overlapping with loss of polarization, there was no significant difference in the 3 groups so far the cellular morphology of fibroblast itself, cellular growth curve, cellular mitotic index, cloning efficiency and DNA content provided those cultures were in the same cellular density and culture conditions. It was concluded that fibroblasts isolated from culture of normal skin, hypertrophic scar and keloid in vitro showed no significant difference in morphology and growth kinetics, on the contrary, their biological behaviors were quite similar.
An experiment on the effect of phenytoin onthe healing of wounds of rabbits with the selfcontrol was otiserved from the followingparameters: the reduction of surface area ofwound, the time required for the healing ofwound, examination of the wound tissues bylight and electronic microscope , and the bacterialcounts of the wound. It was noted thatphenytoin was capable to increase the rate ofwound healing, reduce the time of woundhealing, enhance the growth of healthygranulation tissue, enh...
The experience of the treatment of 5 thoracic ulcers and 1 large and deep neck ulcer was reported. Vascularized latissimus dorsi and rectus abdominis myocutaneous flaps were used to treat the ulcers with one failure. No recurrence was foundduring the followup from one to five years. In the early stage of acute inflammatory necrosis, treatment was focused on debridement. In order to remove the necrotic tissue and provide good drainage, it was not appropriate to cover the wound immediately. In the chronic stage, the radiation ulcers with their adjacent tissues should be excised. Island myocutaneous flap and axial pattern skin flap were selected to repair the wound. If the wound was too large, two flaps may be combined to cover it. No matter what kind of flap was chosen, the donor site should be far away from the ulcer.
In experimental study on pigs was designed to evaluate the changes of the vessel density of super thin skin flaps.By means of stratified sampling, isotropic uniform random section, the vessel density of the supor thin skin flap was obeerved under the MIAS-200 image analyzer. The results showed that the remarkable changes of vascular density were found to begin on the 5th day after operation and was first appeared in the distal port of the survived flap,then,it proceeded gradually from the distal proximally.