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BACKGROUND:There are a lot of adipose-derived stem cel s in the vascular stroma. These cel s are shown to play a very important role in the fat granule transplantation. OBJECTIVE:To explore the role of adipose-derived stem cel s in the fat granule transplantation. METHODS:Normal adipose tissues were obtained from 10 male BALB/C mice, SPF grade. Adipose-derived stem cel s and fat granules were extracted from the abdominal fat tissues. Another 24 nude mice acted as recipients and were assigned into control, fat granule transplantation or mixed transplantation (adipose-derived stem cel s+fat granules) groups. In the latter two groups, fat granule suspension and suspension of fat granules and adipose-derived stem cel s were injected into the shoulder of rats, respectively. In the control group, the same volume of cel medium was injected. Four weeks later, separated plasma and grafts were taken out for indicator measurement. RESULTS AND CONCLUSION:Compared with the fat granule transplantation group, the mixed transplantation could remarkably increase the weight of grafts, while reduce the absorption of grafted fat tissues (P<0.01). After transplantation, the highest level of vascular endothelial growth factor in the plasma was obtained in the mixed transplantation group fol owed by fat granule transplantation group and control group (P<0.01). Level of basic fibroblast growth factor and microvessel density were significantly higher in the mixed transplantation group than the fat granule transplantation group (P<0.01). Better cel morphology and higher number of fat droplets were found in the mixed transplantation group compared with the fat granule transplantation group. Al these results indicate that adipose-derived stem cel transplantation can remarkably promote the expression of basic fibroblast growth factor, improve graft microcirculation, and improve morphology and function of fat granules.
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Objective To observe the changes of MMP-1 and TIMP-1 expression in the pathological scar tissue after scar-skin replantation and to explore the mechanism of treating pathological scars with scar-skin replantation through a rabbit ear model.Methods Rabbit ears were used to establish the hypertrophic scar animal model in this study.Specimens were taken for three times:normal skin,hypertrophic scar and scar-skin replantion separately.We then performed HE staining,Masson staining and immunohistochemical staining to observe the expression of MMP-1 and TIMP-1 in these three groups of specimens.Results The expression of both MMP-1 and TIMP-1 significantly increased in the hypertrophic scar tissue after scar-skin replantation compared with the control group (P＜0.01).The expression of MMP-1 increased more significantly than that of TIMP-1 (P＜0.01).Conclusions The mechanism of scar-skin replantation's effect in the treatment for hypertrophic scar is relevant to the imbalance in the interaction between MMP-1 and TIMP-1 in the scar tissue.
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Objective To investigate the difference between simple continued traction and areola dermal flap filling in inverted nipple correction surgery.Methods There were 60 nipples of 32 patients in simple continuous traction group and 62 nipples of 32 patients in dermal flap filling group.Follow-up was conducted for 12 months.The surgical results were compared with statistical analysis.Results Wound healing,nipple shape,blood supply,feeling and breast-feeding function in simple continuous traction group were better than those of the dermal flap filling group.There was no statistically significant difference in diameter and height of nipple,nipple retraction and relapse rate between the two groups.Conclusions Simple continuous traction is superior to dermal flap filling.Both methods are safe and effective for the treatment of various types of inverted nipple and two groups of patients have improved in symptoms and appearance.
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Objective To treat axillary osmidrosis by using three procedures (small incision apocrine curettage,cut-off operation and aspiration surgery),to observe the postoperative complications,efficacy and the pathological changes of skin,and to explore the advantages of these three procedures.Methods Seventy-five cases of evere bilateral axillary osmidrosis were involved in this study,totally 150 axillary surgery area,which was randomly divided into different group:Group A (curettage group); Group B (cut-off group) and Group C (aspiration group).Different surgical treatment was conducted in the three groups of operation area.Results Incidence of complications was 28.30 ％ and total effective rate was 94.34 ％ in Group A; in Group B,incidence of complications was 6.38 ％,and total effective rate was 97.87 ％ ; in Group C,incidence of complications was 4.00 ％ and total effective rate was 78.00 ％.The incidence of complications was significantly different between Groups A and B and between Groups A and C,but not significant difference between Groups B and C.The cure rate and efficiency were not significant difference between Groups A and B groups,but significant difference was found between Groups A and C and Groups B and C.HE staining results showed that the dermal tissues were partially destroyed in Group A and B,and no apocrine sweat glands were not seen within the dermis and subcutaneous tissues; in Group C,the dermal tissue was rarely destroyed,and a lot of apocrine sweat glands were reserved within the dermis and subcutaneous tissues.Conclusions Efficacy of curettage and cut-off procedures is better,but that of aspiration is worse in the treatment of axillary asmidrosis.The complications of cut-off surgery and aspiration are less,but urettage has more complications.Therefore,the efficacy of cut-off operation is the best with least complications among the three procedures.
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Objective To investigate the expression of the cyclin D1 in pubertal mammary hypertrophy and micromastia. Methods The expression of cyclin D1 was detected by SP immunohisto-chemistry in 18 cases of pubertal mammary hypertrophy and 12 cases of micromastia. Results The expression rate of cyclin D1 within breast tissue was 83. 33 % and 16. 67 % in pubertal mammary hypertrophy and micromastia, respectively. There was significant difference between the two groups (P<0. 01). Conclusion The expression level of the cyclin D1 within breast tissue in pubertal mammary hypertrophy is higher than that in micromastia.