BACKGROUND:Currently, little is reported regarding the effectiveness of mineralized gelatin electrostatic spinning fibers on periodontal tissue osteogenic induction. OBJECTIVE: To investigate the effect of mineralized gelatin electrostatic spinning on the proliferation and osteogenic differentiation of periodontal ligament fibroblasts. METHODS: Human periodontal ligament fibroblasts were respectively compositely cultured with non-mineralized gelatin electrostatic spinning, gelatin electrostatic spinning after 1 day of nano-hydroxyapatite mineralization and gelatin electrostatic spinning after 5 days of nano-hydroxyapatite mineralization. Cel proliferation was determined at 1, 4, 7, 10 and 13 days of culture using MTT assay. Alkaline phosphatase activity of cels was determined at 1, 7, 14 days of culture using biochemical analyzer. RESULTS AND CONCLUSION:At the 10th day of culture, the periodontal ligament cels on the surface of membrane distributed uniformly, grew wel, spread out as sheets and secreted a large amount of extracelular matrix, linked closely with the materialsl; moreover, the effect was more obvious at 5 days of mineralization. Cel growth density and status were better than those in the non-mineralized gelatin electrostatic spinning membrane group. Cel proliferation and alkaline phosphatase activities at different time points: 5-day mineralized gelatin electrostatic spinning membrane group > 1-day mineralized gelatin electrostatic spinning membrane group > non-mineralized gelatin electrostatic spinning fibers group (alP < 0.05). These results demonstrate that the gelatin electrostatic spinning after nano-hydroxyapatite mineralization may promote the proliferation and osteogenic differentiation of periodontal ligament fibroblasts in a time-dependent manner.

Objective To investigate the biological function of miR-622 in human gastric cancer cell lines of SGC-7901 and NCI-N87 cells and its role in gastric carcinogenesis.Methods We analyzed the expression of miR-622 in those human gastric cancer cell lines by quantitative real-time polymerase chain reaction.Tumorigenesis,migration and invasion ability of miR-622 overexpression was assessed in vitro with miR-622 precursor and inhibitor in in SGC-7901 and NCI-N87 cells.Results The expression level of miR-622 in SGC 7901 was 1.29 ± 0.57,and it was 10.96 ± 1.02 in NCI-N87 cells.The soft agar colony formation rate was 76％ in SGC-7901 after transfecting miR-331-3p precursor,the ability of scratch healing was ( 11 ±7) μm,and the ability of transwell invasion was (731 ±3),compared with that in control group,the differences were statistically significant ( P ＜ 0.05 ).Conclusions Over-expression of miR-622 promotes tumorigenesis,migration,and invasion in gastric cancer cells in vitro.

Objective To determine the frequency of Th22 cells and expression of their related cytokines in peripheral blood of patients with alopecia areata(AA), to investigate their significance, and to explore the role of T lymphocytes in the occurrence of AA. Methods A total of 38 patients with AA were enrolled from Central Hospital of Minhang District in Shanghai between January 2015 and May 2016, and served as the case group. At the same time, 38 healthy people served as the control group. Peripheral blood samples were obtained from these patients and controls. Flow cytometry was performed to determine the percentage of Th22 cells, and enzyme?linked immunosorbent assay(ELISA)to measure serum levels of interleukin?22(IL?22)and IL?17. Results Compared with the control group, the case group showed significantly increased percentages of Th22 cells, Th17 cells, IL?17+IL?22+CD4+T cells and IFN?γ+IL?22+CD4+ T cells(all P < 0.01), as well as serum levels of IL?22 and IL?17(both P < 0.05). A significant increase was observed in percentages of Th22 cells, Th17 cells, IL?17+IL?22+CD4+T cells and IFN?γ+IL?22+CD4+T cells, as well as serum levels of IL?22 and IL?17, in patients with severe AA compared with those with mild AA, and in patients with active AA compared with those with stable AA (all P < 0.05). Conclusion Th22 cells and their related cytokines may participate in the occurrence, development and prognosis of AA.

Objectives:To finely divide the aortic sinus into sections and accurately localize the coronary ostium through CARTO three-dimensional mapping,and to assess the clinical effects of treating aortic sinus cusps premature ventricular contraction(ASC-PVC)and the ablation risk in the corresponding area with zero X-ray radiofrequency ablation. Methods:A total of 66 patients who underwent radiofrequency ablation for ASC-PVC from January 2020 to January 2023 were included in this analysis,patients were divided into experimental group(n=34)and conventional group(n=32).In the conventional group,the CARTO 3 system was used to create an aortic sinus model through the conventional method.The earliest stimulating target was identified by using electrical stimulation mapping(ESM).Radiofrequency ablation treatment was performed after the distance between the target and the coronary ostium was precisely measured by coronary angiography through the hollow tube of the ablation catheter or coronary angiography tube.In the experimental group,the CARTO 3 system was used to build a model of the aortic sinus and the coronary ostium and aortic sinus were divided into sections.The earliest stimulating target was identified by ESM.After localizing coronary ostium through the impedance changing pattern on the ablation catheter tips,catheter ablation was performed with zero X-ray.The data regarding the impedance of the ablation catheter in the aortic sinus were collected.The total operative time,the operative time in the aortic sinus,contrast dosage,X-ray exposure time,immediate and short-term success rates of the operation and complication rates were compared between the two groups.Besides,the distribution of successfully ablated targets and their relationship with the risk of ablation were analyzed in both groups. Results:There was no significant statistical difference in the immediate and short-term success rates between the two groups(93.8%vs.94.1%;90.6%vs.88.2%,both P>0.05).The experimental group did not receive contrast agents during the operation,and the total operation time and intra-aortic sinus operation time in the experimental group were significantly shorter than those in the conventional group([58.76±4.94]min vs.[66.91±5.94]min,P<0.001;[43.12±4.49]min vs.[50.31±5.18]min,P<0.001).During the process of moving the ablation catheter from the intra-aortic sinus to the coronary artery opening and into the coronary artery,the impedance suddenly increased,which was significantly different from the impedance in other parts of the intra-aortic sinus(all P<0.001). Conclusions:Radiofrequency ablation of ASC-PVC with zero X-ray can simplify the procedures and shorten the operative time.The steep increase in impedance at the tip of the ablation catheter can be used as a basis for localizing the coronary ostium.Dividing the aortic sinus into sections allows a detailed assessment of the risk for ablation treatment at the targets.

Objective To compare the clinical effect and operation difficulty of the combined skin flap with reversed proper palmar digital arterial dorsal branch island flap and cross-finger flap and the abdominal flap in the treatment of distal finger degloving injury.Methods Inclusion criteria:①Soft tissue defect far beyond the level of distal interphalangeal joints.②The inured finger was from second to fifth.③Single finger injury.④ Iniury time within 8 h.Exclusive criteria:①With tendon injury.② Multiple finger injuries.③Followed-up time within 6 months.Between February,2009 and September,2016,52 patients (52 fingers) with distal finger degloving injury were reviewed,there were 32 males and 20 females,aged from 18 to 60 (36.02±11.00) years.The time from injury to operation was 2.5-8.0 (4.81±1.28) h.Affected fingers included index finger in 15 cases,middle finger in 22 cases,ring finger in 10 cases,and little finger in 5 cases.Twenty patients (20 fingers) were treated by combined skin flap with reversed digital arterial dorsal branch island flap and cross-finger flap(group combined-flap).The cubital skin was grafted onto the donor sites.Thirty-two patients (32 fingers) were treated by abdominal flap (group abdominal-flap).Results The patients were followed-up 6-25 (9.25±3.97) months.The operation time:group combined-flap was 80-130 (98.46±8.34) min and group abdominal-flap was 85-125(107.84±8.63)min.There was no significant difference in two groups (P＞0.05).Pedicle division time:group combined-flap was 15-24 (16.75±1.74) d and group abdominal-flap was 24-45 (28.31±5.12) d.There was a significant difference in two groups (P＜0.05).And the pedicle division time in group combined-flap was much shorter than in group abdominal-flap.Flap function at last follow-up,the excellent and good rate of the flap in group combined-flap and group abdominal-flap was 90.00％ and 59.38％,respectively.There was a significant difference in two groups (P＜0.05),and the flap function in group combined-flap was much better than in group abdominal-flap.Affected finger function at last follow-up,the excellent and good rate of the affected fingers was 95.00％ and 71.88％.There was a significant difference in two groups (P＜0.05),and the affected finger function in group combined-flap was much better than in group abdominal-flap.Conclusion The combined skin flap with reversed digital arterial dorsal branch island flap and cross-finger flap is a simple and high-survival-rate flap,whose texture,appearance and clinical outcome for repair of distal finger degloving injury are much better than traditional abdominal flap.

Objective To study the effect of Ilizarov technique on thumb shortening and bone defect after trauma.Methods The clinical data of 20 patients with thumb shortening or bone defect treated by Ilizarov technique from April 2010 to January 2018 were retrospectively analyzed.There were 19 males and 1 female including 15 left fingers and 5 right fingers.The age ranged from 20 to 56 years,with an average of 33.1 years.The osteotomy plane included 9 cases at distal part of the metacarpal,6 cases proximal phalanx base,1 case interphalangeal joint and 1 case distal part of proximal phalanx.Two cases were osteomyelitis after proximal and distal phalanges trauma,which resulted in interphalangeal joint defects after lesion clearance,and the length of the joint defect was 0.5 cm and 0.7 cm respectively.One case was emergency finger shortening fusion,which resulted in metacarpophalangeal joint defect due to nonunion of fusion site,and the length of the joint defect was 0.5 cm.Causes of injury included mechanical strangulation (12 cases),crush injury (6 cases) and traffic injury (2 cases).Semi-ring external fixator was used to extend the extension.There were 15 cases of metacarpal bone osteotomy and 5 cases of proximal phalanx osteotomy,prolonged from the 5th day after surgery.The osteotomy was prolonged by 0.5 mm every day,once every 6 hours.Results The follow-up time ranged from 184 to 446 days with an average of 244.6 days.The average extension period was 62.2 days (26-118 days),and the average extension length was 3.1 cm (1.3-5.9 cm).The healing index was 43.7-84.1 d/cm and the average healing index was 64.8 d/cm.The external fixed extender was used for 114-376 days with an average of 206.3 days.The distraction index was 20.1 c/cm (range,19.5-21.4 d/cm) and the maturity index was 46.5 d/cm (range,39.4-110.1 d/cm) and the external fixation index was 66.5 d/cm (range,60-130.8 d/cm).The finger pointing function and sensory function of thumb were restored after operation.According to the trial criteria of thumb and finger reconstruction function evaluation in the upper limb part evaluation criteria of Hand Surgery Society of Chinese Medical Association,11 cases were excellent,9 cases good,and the excellent and good rate was 100％(20/20).The two-point discrimination was 4-9 mm.The patients were satisfied with the function and appearance.Conclusion Ilizarov technique is a good method to treat thumb shortening and bone defect after trauma.