Autologous Fat Grafting in Scar Revision / 中国医学科学院学报

Regenerative medicine is an emerging discipline. Adipose tissue is a rich source of fat cells and mesenchymal stem cells, and autologous fat grafting has increasingly been applied in plastic surgeries and dermatological treatments. This paper reviews the latest advances in autologous fat grafting in scar revision.

Effect of Dermabrasion and ReCellon Large Superficial Facial Scars Caused by Burn, Trauma and Acnes / 中国医学科学杂志(英文版)

<strong>Objective</strong> To explore the effects of dermabrasion combined with ReCellon large superficial facial scars caused by burn, trauma and acnes.<strong>Methods</strong> Nineteen patients with large superficial facial scars were treated by the same surgeon with dermabrasion combined with ReCell. According to the etiology, patients were classified into post-burning group (n=5), post-traumatic group (n=7) and post-acne group (n=7). Fifteen patients completed the follow-ups, 5 patients in each group. Healing time, complication rate, the preoperative and 18-month-post-operative assessments using Patient Satisfaction Score (PSS), Vancouver Scar Scale (VSS), and Patient and Observer Scar Assessment Scale (POSAS) of each group were analyzed to compare the effect of the combined therapy on outcomes.<strong>Results</strong> The healing time of post-burning group (19.6±4.0 days), post-traumatic group (15.8±2.6 days), and post-acne group (11.4±3.1 days) varied remarkably (F=7.701, P=0.007). The complication rates were 60%, 20%, and 0 respectively. The post-operative POSAS improved significantly in all groups (P<0.05), where the most significant improvement was shown in the post-acne group (P<0.05). The post-operative PSS and VSS improved only in the post-traumatic group and post-acne group (all P<0.05), where the more significant improvement was also shown in the post-acne group (P<0.05).<strong>Conclusions</strong> The combined treatment of dermabrasion and ReCellhas remarkable effect on acne scars, moderate effect on traumatic scars and is not suggested for burn scars. POSAS should be applied to assess the therapeutic effects of treatments for large irregular scars.

Effect of Dermabrasion and ReCellon Large Superficial Facial Scars Caused by Burn, Trauma and Acnes / 中国医学科学杂志(英文版)

Objective To explore the effects of dermabrasion combined with ReCellon large superficial facial scars caused by burn, trauma and acnes.Methods Nineteen patients with large superficial facial scars were treated by the same surgeon with dermabrasion combined with ReCell. According to the etiology, patients were classified into post-burning group (n=5), post-traumatic group (n=7) and post-acne group (n=7). Fifteen patients completed the follow-ups, 5 patients in each group. Healing time, complication rate, the preoperative and 18-month-post-operative assessments using Patient Satisfaction Score (PSS), Vancouver Scar Scale (VSS), and Patient and Observer Scar Assessment Scale (POSAS) of each group were analyzed to compare the effect of the combined therapy on outcomes.Results The healing time of post-burning group (19.6±4.0 days), post-traumatic group (15.8±2.6 days), and post-acne group (11.4±3.1 days) varied remarkably (F=7.701, P=0.007). The complication rates were 60%, 20%, and 0 respectively. The post-operative POSAS improved significantly in all groups (P<0.05), where the most significant improvement was shown in the post-acne group (P<0.05). The post-operative PSS and VSS improved only in the post-traumatic group and post-acne group (all P<0.05), where the more significant improvement was also shown in the post-acne group (P<0.05).Conclusions The combined treatment of dermabrasion and ReCellhas remarkable effect on acne scars, moderate effect on traumatic scars and is not suggested for burn scars. POSAS should be applied to assess the therapeutic effects of treatments for large irregular scars.

The clinical classification method research of keloid / 中华整形外科杂志

<p><b>OBJECTIVE</b>To explore the clinical classification method of keloids and providing a thread for the treatment of keloids.</p><p><b>METHODS</b>To summarize the 600 cases of keloid patients we accepted and diagnosed from November 2004 to October 2012, and filling in keloid patients information sheet, recording the keloids form by photographs, analyzing the treatment, putting forward the classification method of keloids in clinic.</p><p><b>RESULTS</b>According to the position and quantity that keloids grow, the keloid patients are divided into four major categories:one in single site, one in each site, more than one in single site and more than one in each site; According to the area and thickness of keloids, the keloid single lesion is divided into four subclasses: type of small area and thin, type of small area and thick, type of large areas and thin,type of large areas and thick; According to the number of lesions, keloid multiple lesions is divided into two subgenera: isolated multiple and dispersion multiple, different kinds of keloids suit different methods of treatment.</p><p><b>CONCLUSION</b>The clinical classification method of keloids can be used to provide thought for the treatment of keloids, and have a good application value.</p>

Skin needle roller importing triamcinolone acetonide into scar to treat hypertrophic scars / 中华整形外科杂志

<p><b>OBJECTIVE</b>To evaluate the effect of importing triamcinolone acetonide into hypertrophic scars with skin roller needles.</p><p><b>METHODS</b>Thirty-two cases with burn hypertrophic scar were treated. The skin roller needles were moved back and forth on the hypertrophic scars with triamcinolone acetonide dropping on the scar surface at the same time. So the triamcinolone acetonide could be imported into the scar through needles and needle holes. The effect was evaluated as cured, effective, and no effect. The Vancouver scaring criteria and visual analogue scale was used to assess the scar color, thickness, texture and feeling before and after treatment, as well as at the untreated scar area (control).</p><p><b>RESULTS</b>Thirty-two cases were treated 1-3 times, including 28 cases with cured result and 4 cases with effective result. The total effective rate was 100%. The scar color, thickness, texture and feeling was significantly different between the scar before and after treatment, or between the treated and untreated scar (P < 0.05).</p><p><b>CONCLUSIONS</b>Importing triamcinolone acetonide into hypertrophic scars with skin roller needles is effective. It is a new method for the treatment of large hypertrophic scar with medicine.</p>

Transforming growth factor-β1 phage model peptides isolated from a phage display 7-mer peptide library can inhibit / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Transforming growth factor-β1 (TGF-β1) is known to have a role in keloid formation through the activation of fibroblasts and the acceleration of collagen deposition. The objective of this current study was to isolate TGF-β1 phage model peptides from a phage display 7-mer peptide library to evaluate their therapeutic effect on inhibiting the activity of keloid fibroblasts.</p><p><b>METHODS</b>A phage display 7-mer peptide library was screened using monoclonal anti-human TGF-β1 as the target to obtain specific phages containing ectogenous model peptides similar to TGF-β1. Enzyme-linked immunosorbent assay (ELISA) was performed to select monoclonal phages with good binding activity, which underwent DNA sequencing. MTT assay and apoptosis assessment were used to evaluate the biological effects of the phage model peptides on keloid fibroblasts. Immunofluorescence assay was employed to show the binding affinity of the model peptides on phages causing keloid fibroblasts. Quantitative real-time PCR analysis was carried out to detect the expressions of nuclear factor κB (NF-κB) mRNA, connective tissue growth factor (CTGF) mRNA and TGF-β receptor II (TβRII) mRNA in keloid fibroblasts.</p><p><b>RESULTS</b>Specific phages with good results of ELISA were beneficiated. Four phage model peptides were obtained. The data of MTT showed that TGF-β1 and one phage model peptide (No. 4) could promote keloid fibroblasts proliferation, however, three phage model peptides (No. 1 - 3) could inhibit keloid fibroblasts proliferation. The results of apoptosis assessment showed that the three phage model peptides could slightly induce the apoptosis in keloid fibroblasts. The data of immunofluorescence assay revealed that the model peptides on phages rather than phages could bind to keloid fibroblasts. The findings of quantitative real-time PCR analysis suggested that the expressions of NF-κB mRNA and CTGF mRNA in the three phage model peptide groups decreased, while the expression of TβRII mRNA slightly increased.</p><p><b>CONCLUSIONS</b>Three phage model peptides isolated from a phage display 7-mer peptide library can inhibit keloid fibroblasts proliferation and induce the apoptosis in keloid fibroblasts. They can inhibit the activity of keloid fibroblasts by blocking TGF-β1 binding to its receptor and then regulating the expressions of NF-κB, CTGF and TβRII.</p>

Effect of survivin antisense oligodeoxynucleotide on proliferation and apoptosis of human malignant melanoma cells / 中华烧伤杂志

<p><b>OBJECTIVE</b>To investigate the effect of survivin antisense oligodeoxynucleotide (ASODN) on proliferation and apoptosis of human malignant melanoma cells.</p><p><b>METHODS</b>hMMC A375 colonies in log growth phase were collected and divided into control group (C, without transfection), sense chain group [SC, transfected with 600 nmol/L survivin sense oligodeoxynucleotide (ODN)], mismatch chain group (MC, transfected with 600 nmol/L survivin mismatch sense ODN), liposome group (L, treated with liposome), antisense chain group (AC, transfected with survivin ASODN, and subdivided into AC 200, 400, 600 nmol/L subgroups) according to the random number table. Transfection result was observed under inverted fluorescence microscope. Inhibition rate of cell proliferation was calculated after determination of cell viability with MTT method. Cell cycle and apoptosis rate were detected with bi-variable flow cytometry. Expression of survivin protein was determined with Western blot. Activity of caspase-3 was assessed with kinase method. Data were processed with analysis of variance.</p><p><b>RESULTS</b>(1) Cell transfection rates in SC, MC, AC 600 nmol/L groups were all above 80%. (2) Compared with those in SC group [(5.23 +/- 0.25)%], MC group [(5.09 +/- 0.13)%] and L group [(4.70 +/- 0.45)%], inhibition rates of cell proliferation in AC 200, 400, 600 nmol/L groups 24 hours after transfection [(10.30 +/- 0.56)%, (16.69 +/- 0.58)%, (24.67 +/- 0.67)%] were significantly increased (F = 746.91, and P values all below 0.05). As time after transfection went on, proliferation inhibition rate was increased obviously. (3) Apoptosis rate in AC 200, 400, 600 nmol/L groups 24 hours after transfection was respectively (13.5 +/- 1.9)%, (20.1 +/- 1.5)%, (32.1 +/- 2.9)%, which were significantly higher than those in C, SC, MC, and L groups [(6.5 +/- 0.6)%, (5.6 +/- 0.7)%, (6.4 +/- 1.0)%, (6.5 +/- 1.3)%, F = 139.9, P values all below 0.05]. Cells in AC group were blocked in G2/M stage. (4) Compared with those in C group, expression amount of survivin protein decreased, and caspase-3 activity obviously increased (F = 63.1, P values all below 0.05) in AC group. No significant difference in caspase-3 activity between SC, MC, L groups and C group was observed (F = 0.512, P values all above 0.05).</p><p><b>CONCLUSIONS</b>Survivin ASODN can inhibit the proliferation of hMMC A375 in a concentration-time dependent manner, and it induces G2/M stage block and promotes its apoptosis.</p>

Keratinocyte growth factor phage model peptides can promote epidermal cell proliferation without tumorigenic effect / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Keratinocyte growth factor (KGF) significantly influences epithelial wound healing. The aim of this study was to isolate KGF phage model peptides from a phage display 7-mer peptide library to evaluate their effect on promoting epidermal cell proliferation.</p><p><b>METHODS</b>A phage display 7-mer peptide library was screened using monoclonal anti-human KGF antibody as the target. Enzyme linked immunosorbent assay (ELISA) was performed to select monoclonal phages with good binding activity. DNA sequencing was done to find the similarities of model peptides. Three-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay, immunofluorescence assay and quantitative real-time PCR analysis were employed to evaluate the effect of the phage model peptides on epidermal cells.</p><p><b>RESULTS</b>Thirty-three out of fifty-eight (56.9%) of the isolated monoclonal phages exhibited high binding activity by ELISA. Ten of fifteen obtained phage model peptides were similar to KGF or epidermal growth factor (EGF). MTT assay data showed that four (No. 1 - 4) of the ten phage model peptides could promote epidermal cell proliferation. The expression of keratinocyte growth factor receptor (KGFR) mRNA in the KGF control group and the two phage model peptide groups (No. 1 and No. 2) increased. Expression of c-Fos mRNA and c-Jun mRNA in the KGF control group increased, but did not increase in the four phage model peptide groups (No.1 - 4).</p><p><b>CONCLUSION</b>Four phage model peptides isolated from the phage display 7-mer peptide library can safely promote epidermal cell proliferation without tumorigenic effect.</p>

Experimental research of correlation between anatomy structure of rabbit ear and creating hypertrophic scar animal model / 中华整形外科杂志

<p><b>OBJECTIVE</b>To observe the anatomy structure of rabbit ear and the effect of different operation methods and post-operative treatments on the formation of hypertrophic scar.</p><p><b>METHODS</b>The experimental animals were 25 New Zealand white rabbits. 6 pieces of full skin specimens were obtained from each of the ears in 5 rabbits for histological examination. 6 full-thickness skin wounds (d = 8 mm) were made on different sites of ventral side of each ear in the other 20 rabbits. The total number of the wounds was 240. 120 wounds in 10 rabbits were divided into 4 groups randomly to receive different treatments on day 7 postoperatively. No treatment was performed in the other 120 wounds. The wounds healing and the scar formation were observed for six months. The scars were harvested 4 weeks and 8 weeks after operation for pathologic examination and measurement of scar elevation index (SEI).</p><p><b>RESULTS</b>Histological analysis showed that the anatomy structure was different in different sites of the rabbit ear. The best sites for creating hypertrophic scar model were on the medial margin of the middle- and inferior part of ear. The depth of the wound should reach the cartilage membrane of the ear to facilitate the formation of hypertrophic scar. The second strip crust on day 7 postoperatively enhanced the wounds healing and minimized the scar proliferation and hypertrophy.</p><p><b>CONCLUSIONS</b>There is a close correlation between the anatomy structure of the ear and the creation of hypertrophic scar animal model. The wound site, the depth of wound and the post-operative treatment will affect the formation of hypertrophic scar. The study can help to improve the successful rate of creating hypertrophic scar animal model.</p>

Significance of location of mandibular canal by 3-dimensional CT in the mandibular angle osteotomy / 中华整形外科杂志

<p><b>OBJECTIVE</b>To decrease the incidence of inferior alveolar neurovascular bundle injury through location of mandibular canal by 3-dimensional (3-D) CT.</p><p><b>METHODS</b>30 female cases with prominent mandibular angle underwent 3-D CT before operation. The 3-D images were used to measure the distances between upper points of lower teeth to the inferior border of the canal. Then the osteotomy was designed according to the canal position to avoid the inferior alveolar neurovascular bundle injury. The canal protection was observed intraoperatively and postoperatively.</p><p><b>RESULTS</b>The mandibular canal was protected very well in all 30 cases without any injury to the inferior alveolar neurovascular bundle.</p><p><b>CONCLUSIONS</b>The 3-D CT can accurately locate the mandibular canal to guide the design of the mandibular angle osteotomy for patients with prominent mandibular angle.</p>

Effect of vascular endothelial growth factor 165 gene transfection on bone defects and its mRNA expression in rabbits / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Gene therapy has been a hot spot in repair of bone defects in recent years. This study aimed to construct a recombinant plasmid pcDNA3.1-VEGF(165), and to observe the effect of vascular endothelial growth factor 165 (VEGF(165)) gene therapy on bone defects in rabbits.</p><p><b>METHODS</b>Total RNA was extracted from rabbit bone tissues. VEGF(165) cDNA fragment was prepared by reverse transcription and the gene was cloned by polymerase chain reaction (PCR). Plasmid pMD18-T/VEGF(165) combined with pcDNA3.1 was cloned to reconstruct pcDNA3.1-VEGF(165) plasmid. Thirty New Zealand white rabbits weighing (2.50 +/- 0.13) kg were used to establish models of bone defects (1 cm in length) of the bilateral radii. The bone defects were repaired with absorbable gelatin sponge. After the operation, physiological sodium chloride solution was injected into the injured site in one of the forelegs of the rabbits as the control group, and pcDNA3.1-VEGF(165) plasmid (0.2 ml, 200 ng) was injected into the opposite foreleg as the experiment groups. At weeks 1, 2, 4, 6, 8, and 12 after the treatments, the bones were examined by X-ray, and the specimens of the bone defects were collected, stained with HE, and observed under a light microscope. The expression of VEGF(165) mRNA was examined by real-time quantitative polymerase chain reaction (RQ-PCR).</p><p><b>RESULTS</b>The pcDNA3.1-VEGF(165) plasmid with a correct sequence was constructed successfully. Postoperative X-ray found no difference between the two groups at week 1. In the experiment group, callus and synostosis were observed after 2 weeks, and osteosis structure was normal at week 12; these phenomena occurred much later in the control group. In the experiment group, HE staining showed a large amount of newly formed blood vessels after 2 weeks, a number of bone trabeculae with osteoblasts proliferation at 4 weeks, and fresh bone cortex and reformed medullary cavity at 12 weeks; whereas in the control group these structures formed in later phases. The VEGF(165) mRNA in the experiment group was expressed at a low level at week 1, reached the peak at weeks 3, and then decreased to a normal level after 6 weeks.</p><p><b>CONCLUSIONS</b>Local use of pcDNA3.1-VEGF(165) plasmid at bone defects can upregulate the expression of VEGF(165) and accelerate the formation of capillaries and the repair of bone defects. Angiogenesis and osteogenesis can be promoted by a combination of pcDNA3.1-VEGF(165) and gelatin sponge.</p>

The effect of pcDNA3.1-vEGF165 recombined vector on wound healing and the expression of collagen type I, III mRNA in wounded tissue / 中华整形外科杂志

<p><b>OBJECTIVE</b>To examine the effect of pcDNA3.1-VEGF165 vector to the angiogoiesis, expression of collagen type I and type III mRNA in soft tissue injury model.</p><p><b>METHODS</b>Thirty two Sprague-Daulay rats,weighted (180 +/- 20) g, were made tissue injury in the bilateral of vertebral region. Round wound (diameter 12 mm) was made by perforex on the back, removed the skin and 2 mm muscle, one side was experimental group by random and the other as control. The wound was done with sodium chloride (0.2 ml) in the control group, with the recombinant VEGF165 vector (0.2 ml, 200 mg) in the experimental group. The wound healing and other general state of health was observed after the operation. The specimens were obtained at 3,5, 7,14 and 30 days after injury. Draw the materials from the rats at the same time, all samples were divided into two parts. one ( > 0.1 g) was conserved in refrigerator at - 80 degrees C, which was extracted total RNA by TRIZOL, design the primer of rat's collagen type I and type III, RT-PCR analysis indicated that collagen type I, III. The other was fixed by 10% formalin. Examine wound healing of local tissue and count it' s MVD by HE staining.</p><p><b>RESULTS</b>All the rabbits were well alive, no death or infection. Wound healing time was shorter than the control one (14.2, 17.4 d). Inflammatory cell infiltrate, cellula intersitialis, fibroblast, collagen and the density of angiogenesis were more in the experimental group than in the control one. The MVD was significant difference between the two groups at 1, 2 weeks are 63.38 +/- 9.20, 52.72 +/- 7.06 and 76.64 +/- 12.27, 66.84 +/- 9.82 (P < 0.05). The expression of collagen type I , III mRNA was found in the third day, the peak was in the second week and then degression. The collagen type I , III mRNA and beta-actin specificitic belt were found and its initial template volume different, the results was trend of RT-PCR obtained.</p><p><b>CONCLUSIONS</b>The local application of pcDNA3.1-VEGF165 can enhance the expression of collagen type I, III mRNA, enhance angiogenesis and extra cellular matrix, both of which can shorten healing time of tissue injury.</p>

Study on poly A site gene mutation of transforming growth factor-beta1 receptor type II between multiple and single site keloid / 中华整形外科杂志

<p><b>OBJECTIVE</b>To investigate the pathogenesy deference between multiple and single site keloid by detecting gene mutation of Poly A site of transforming growth factor-beta1 receptor type II (TbetaR II).</p><p><b>METHODS</b>Collecting 20 keloid samples (6 multiple sites keloid samples and 14 single site keloid samples) and extracting DNA from them; designing and synthesizing the primers of Poly A site, then amplifying T1beta II DNA by PCR, analyzing the single strand conformation polymorphism about the products of PCR. After purifying the product of PCR, the site and type of the mutation rate of Poly A site was sequenced directly on the automatic sequencing equipment.</p><p><b>RESULTS</b>It had been found that the Poly A site of TbetaR II in keloid has deletion mutation, its mutation rate in multiple sites keloid was 50% (3/6), in single site keloid 7.1% (1/14). The mutation rate of Poly A site in multiple sites keloid was significant higher than that in single site keloid (P < 0.05)</p><p><b>CONCLUSION</b>It has been supposed that there are some deference in pathogenesy between the multiple and the single site keloid.</p>

Repairing soft-tissue defection of ankle and foot by sural neurovascular pedicle fasciocutaneous reversed island flap / 中华整形外科杂志

<p><b>OBJECTIVE</b>To explore the clinical application of sural neurovascular pedicle fasciocutaneous reversed island flap to repair soft-tissue defection of the ankle and foot.</p><p><b>METHODS</b>From Sep. 1994 to Oct. 2004,29 patients with soft-tissue defects in the ankle and foot were repaired by use of sural neurovascular fasciocutaneous reversed island flap, including 15 cases of traumatic defects, 11 cases of burns and 3 cases of chronic ulcer. The flap area ranged from 5 cm x 7 cm to 12 cm x 20 cm, and the length of pedicle from 5 cm to 12 cm.</p><p><b>RESULTS</b>The flaps survived totally in 27 cases, the distal necrosed partially and secondary free-skin grafting were further conducted in 2 cases. Twenty-one cases were followed-up for 3 to 60 months,the circulation, color and texture of the flaps were excellent and 2-point discrimination was 10 - 15 mm. The appearance and function of ankle joints were good.</p><p><b>CONCLUSION</b>This flap has sufficient blood supply and a high survival rate; It is convenient in design, dissection and without sacrifice of major arteries. So, it is an effective method for the reconstruction of soft-tissue defects in ankle and foot.</p>