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Objective:To investigate the efficacy and safety of fat suction combined with bipolar radiofrequency on face and neck rejuvenation.Methods:A total of 115 patients with face and neck fat deposits and skin laxity underwent fat suction combined with bipolar radiofrequency between December 2021 and October 2022 by the same surgeon in Changsha My Like Medical Cosmetology Hospital. There were 3 men and 112 women in this research. The mean age was 36.1 years (range, 26-55 years) and the mean body mass index was 21.4 (range, 16.8-27.7 kg/cm 2). Postoperative patient satisfaction surveys were conducted and 2 independent doctors evaluated clinical effect with preoperative and postoperative photographs at 3-6 months postoperatively. Results:The mean amount of fat aspirated was 44.5 ml (range, 10-92 ml) and the mean energy delivered was 4.5 kJ (range, 2.1-8.9 ml). 88.7% of patients were satisfied with their postoperative effect (102/115 patients). 92.2% of doctors were satisfied with the postoperative effect (106/115 patients). Four out of 115 patients (3.5%) developed irregularity by fat suction.Conclusions:Fat suction combined with bipolar radiofrequency can effectively reduce the fat accumulation of facial and neck and significantly improve skin relaxation. It is an effective method to rejuvenate facial and neck.
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Objective To evaluate the effect of resurfacing facial atrophic acne scars with 2790 nm YSGG fractional laser.Methods 38 patients with facial atrophic acne scars were treated with the 2790 nm YSGG fractional laser.All patients were randomly divided into two groups:group A using the combination with ablative and non-ablative mode of treatment; group B only using the non-ablative mode throughout the entire face,four treatment sessions for each patient,6 weeks interval.Comparative photographs were taken by using VISIA.Specific complexion analysis was used to identify and quantify depressed scars and texture,and patient satisfaction was graded with a 4-point scale.Results All of facial atrophic acne scars obtained different degree of improvement were treated by 4 times.In groups A and B,cure rate achieved 56.0 ％ and 30.8 ％,respectively.All the 38 patients had a chieved efficacy (81.6 ％),and they were satisfied with the results (84.2 ％).No severe side effect was observed.Conclusions 2790 nm YSGG laser is easy to manipulate and is more exactly than other lasers.It is especially effective in enhancing the clinical outcomes of scar revision with less complications and pigmentation,and thereby 2790 nm YSGG fractional laser can provide the patients with superficial scar in face as an additional therapeutic option.
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Objective To investigate the biological activities of a conditioned medium for human dermal papilla. Methods Culture medium of the lower passage human dermal papilla cells was collected as the conditioned medium. The growth pattern and the growth curve of the higher passage human dermal papilla cells cultured with conditioned medium were observed in vitro. And the morphology of the co-culture of the higher passage human dermal papilla cells and the lower passage human dermal papilla cells was observed. Results The higher passage human dermal papilla cells, which was cultured with conditioned medium from the lower passage human dermal papilla cells, showed aggregative growth pattern. And the growth curve of the higher passage human dermal papilla cells was much better than that in the control groups (P
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Objective To screen and analyze genes differentially expressed within dermal papillae cells(DPC)with aggregative behavior.Methods Total RNA was extracted from DPC with and without ag-gregative behavior,and double-stranded cDNA were synthesized by using SMART cDNA synthesis.The cD-NA fragments of differentially expressed genes in dermal papillae cells with aggregative behavior were isolat-ed by suppression subtractive hybridization,sequencing,and then subtracted library was set up.Positive clones were screened by PCR method and verified by cDNA dot blot and then analyzed through homologous retrieving.Results A subtractive cDNA library of DPC with aggregative behavior was successfully construct-ed.The results of screening and cloning of the library showed that DPC with aggregative behavior could ex-press genes related to homologous aggregation,regnlation of growth,differentiation and development,and sig-nal transduction proliferation and cycle control,which included known genes(capping protein,paladin,vas-cular endothelial growth factor),hematopoietic stem/progenitor cells(HSPC)related genes(HSPC011and HSPC016)and a new gene.Conclusions The construction of subtractive library of DPC lays solid founda-tion for screening and cloning new and specific genes related to aggregative behavior of DPC.Several genes may cooperatively involve in homologous aggregation,and regnlation of growth of DPC.Among these genes,capping protein and palladin may be closely related to aggregative behavior of DPC,and VEGF and HSPC re-lated clones may be responsible for the status of higher proliferation of DPC.
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Objective To investigate the actions of extra cellular medium in growth and differentiation of hair follicle and to look for growth adjusting factors for dermal papilla cells (DPC). Methods Dermal papilla cells were isolated and cultivated with two steps method and the cells were identified by immunohistochemical staining for actin. Influence was examined on the adhesion and growth of dermal papilla cells by chondroitin sulfate A, chondroitin sulfate C and heparin sulfate. Results Two steps method of enzyme digestion for isolating and cultivating dermal papilla cells was an efficient method and large amount of dermal papilla of high purity were harvested with this method. The method is very simple and easy to manege with. Increased adhesion and growth of dermal papilla cells were observed in specimen treated with chondroitin A and heparin sulfate. No significant effects was observed in the cells treated with chondroit in sulfate C. Conclusion Some extra cellular medium can regulate the adhesion and growth of dermal papilla cells and therefore influence the growth and development of hair follicle.
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Objective To investigate the actions of extra cellular medium in growth and differentiation of hair follicle and to look for growth adjusting factors for dermal papilla cells (DPC). Methods Dermal papilla cells were isolated and cultivated with two steps method and the cells were identified by immunohistochemical staining for actin. Influence was examined on the adhesion and growth of dermal papilla cells by chondroitin sulfate A, chondroitin sulfate C and heparin sulfate. Results Two steps method of enzyme digestion for isolating and cultivating dermal papilla cells was an efficient method and large amount of dermal papilla of high purity were harvested with this method. The method is very simple and easy to manege with. Increased adhesion and growth of dermal papilla cells were observed in specimen treated with chondroitin A and heparin sulfate. No significant effects was observed in the cells treated with chondroit in sulfate C. Conclusion Some extra cellular medium can regulate the adhesion and growth of dermal papilla cells and therefore influence the growth and development of hair follicle.
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Objective To investigate the actions of extra cellular medium in growth and differentiation of hair follicle and to look for growth adjusting factors for dermal papilla cells (DPC). Methods Dermal papilla cells were isolated and cultivated with two steps method and the cells were identified by immunohistochemical staining for actin. Influence was examined on the adhesion and growth of dermal papilla cells by chondroitin sulfate A, chondroitin sulfate C and heparin sulfate. Results Two steps method of enzyme digestion for isolating and cultivating dermal papilla cells was an efficient method and large amount of dermal papilla of high purity were harvested with this method. The method is very simple and easy to manege with. Increased adhesion and growth of dermal papilla cells were observed in specimen treated with chondroitin A and heparin sulfate. No significant effects was observed in the cells treated with chondroit in sulfate C. Conclusion Some extra cellular medium can regulate the adhesion and growth of dermal papilla cells and therefore influence the growth and development of hair follicle.
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Objective To investigate the location and proliferation of human hair follicle stem cells. Methods The expression of keratin 19(K19) in the human hair follicles on the occiput was detected by immunohistochemical staining, and the positive area was located. The follicle epithelium containing the K19-positive area above the hair bulb were cultured with or without mesenchymes (dermal papilla cells, DPCs) at the air-liquid interface of the collagen gel. When the proliferating colonies formed, the distance from the colony to the bottom of hair follicles was measured and the relationship between the K19-positive position and the proliferation colonies was analyzed. The ultrastructure of the proliferation colony was observed by transmission electron microscopy. Results Two portions were found positive for K19 in the outer root sheath of the human hair follicles, the upper one being at the bulge region and the lower one at the outer root sheath above the hair bulb. The proliferating colony formed only when the epithelium of the hair follicle was co-cultured with mesenchymes cells. The statistical analysis suggested the lower portion positive for K19 and the proliferation colonies in the culture were traced to locate at the same site of the human hair follicles. Under electron microscopy, juvenile cells, mature keratinocytes and apoptotic cells were found in the proliferating colonies. Conclusions The human hair follicles may contain two distinct reservoirs for stem cells, which locate in the bulge area and in the region of the outer root sheath above the hair bulb, respectively. Mesenchymes are needed for the proliferation of stem cells. New stem cells, mature keratinocytes and apoptotic cells may be three endings of the stem cells′ proliferation.
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Objective To investigate the effects of staphylococcal enterotoxin A SEA gene on target cells mediated by replicative-deficient recombinant adenovirus vector. Methods Lymphocytes of C57BL/6 mice were infected with various titers of recombinant adenoviruses. Supernatants were collected after 12 h, 24 h, 48 h, 72 h, 96 h, 120 h and 144 h of incubation and analyzed for proliferation of lymphocytes by MTT assay. IL-2 level in the culture supernatants was measured with ELISA. The killing effect of lymphocytes was also observed by MTT assay. Results Proliferation response and elevated levels of IL-2 were observed in experimental group. The killing effect on B16 cells was stronger in experimental group, which seemed to be dose-dependent with the increase of ratio of lymphocytes/target cells. Conclusions SEA gene can be expressed in lymphocytes of C57BL/6 mice mediated by replicative-deficient recombinant adenovirus vector. The expressing products can activate lymphocytes of C57BL/6 mice, which kill B16 cells in vitro.
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Objective To investigate Th1/Th2 pattern of response in psoriasis and to study the effects of CTLA4Ig on Th1/Th2 shift in psoriasis. Methods The levels of IL-2, IFN-?and IL-4 were assessed by ELISA in the supernatant of cultured peripheral blood mononuclear cells (PBMCs) from 33 patients with psoriasis vulgaris and 20 healthy blood donors. Cytokine synthesis was induced by activation with phytohemagglutinin (PHA) and staphylococcal enterotoxin B (SEB) with or without CTLA4Ig. Results Levels of IL-2, IFN-?and IL-4 were markedly increased by PBMCs from psoriatic patients incubated with SEB (P
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Objective To study the phenomena and the related mechanisms of malignant transformation of dermis derived multipotential stem cells in vitro . Methods Clonal populations of dermal multipotential stem cells were passaged sequentially in vitro , and the subcutaneous inoculation of cells in nude mice was used for observation of the tumor formation. The transcript profiles of the transformed cells were analyzed by DNA microarray technique. Results Dermal multipotential stem cells underwent spontaneous malignant transformation after serial subculture in vitro . Cells grew out of control, and chromosome number was abnormal. After cells were inoculated subcutaneously into BALB/c nu/nu athymic mice, tumors characterized by fibrous histiocytoma were produced. Immunohistochemistry showed that there were different cell populations for the expression of vimentin, cytokeratin, S 100, and ? smooth actin. Detection by DNA microarray technique revealed that the transformed cells expressed multilineage transcripts, indicating that the transformed cells might have the multipotency. Among the differentially expressed genes in transformed cells, most of the up regulated genes were related to the proliferation process, but most of the down regulated genes were growth factors and their receptors. The enhanced expression of the c ki ras gene and its relevant molecules may play important roles in the transformation process. A candidate gene with unknown functions related to the stem cell proliferation was also preliminarily identified. Conclusion Dermal multipotential stem cells can undergo spontaneous malignant transformation in vitro . Further studies of the mechanisms of this process at the molecular level may have significance both in stem cell application and in tumorigenesis.