1.Pirfenidone effects on human hypertrophic scar fibroblasts cultured in vitro
Wei LAN ; Xiaojian LI ; Xueliang JI ; Xianfeng YI ; Yanzhi LIU ; Rongmei TU
Chinese Journal of Tissue Engineering Research 2015;(24):3808-3812
BACKGROUND:Studies have shown that cytokine inhibitor pirfenidone can inhibit biological activity of fibroblasts by regulating a variety of cytokines. It has made good progress in the research and application of anti-fibrosis of internal organs, but the effect and mechanism for hypertrophic scars and skin fibroblasts are unclear. OBJECTIVE:To investigate the effect of pirfenidone on human hypertrophic scar fibroblasts. METHODS:Human hypertrophic scar fibroblasts were cultured using tissue culture method. Passages 3-6 cel s grew wel in the logarithmic growth phase were col ected. Cel s were divided into the control group (0 g/L pirfenidone), 0.15, 0.3 and 1 g/L pirfenidone groups according to different mass concentrations. Cel s were intervened for 12, 36 and 48 hours. RESULTS AND CONCLUSION:MTT, reverse transcription-polymerase chain reaction and enzyme-linked immunosorbent assay results demonstrated that compared with the control group, cel proliferation, transforming growth factorβ1 mRNA expression, types I and III col agen secretion were decreased in the 0.15, 0.3 and 1 g/L pirfenidone groups (P<0.05), and the decrease was most significant in the 1 g/L pirfenidone group (P<0.05). At 24, 48 and 72 hours after intervention, significant differences in inhibitory rate of cel proliferation and the secretion of types I and III col agen were detected among 0.15, 0.3 and 1 g/L pirfenidone groups (P<0.05). Results confirmed that pirfenidone apparently inhibited the secretion of col agen of hypertrophic scar fibroblasts cultured in vitro, transforming growth factorβ1 expression and cel proliferation and viability.
2. Clinical efficacy of dorsal digital nerve fasciocutaneous pedicle flap with superficial vein anastomosis in repair of the type III and type IV of fingertip defects
Liang GUO ; Xuejun WU ; Jingui LIN ; Xianfeng LAN
Chinese Journal of Microsurgery 2019;42(6):528-532
Objective:
To analysis the clinical efficacy of dorsal digital nerves fasciocutaneous pedicle flap (DDNFPF) with superficial vein anastomosis in the treatment of the type III and type IV of fingertip defect, and the relationship between the incidence of vein crisis and superficial vein anastomosis.
Methods:
A total of 85 patients with 92 fingers, treated by DDNFPF from February, 2017 to December, 2018, were retrospectively analyzed. The superficial veins of 30 patients with 32 fingers were anastomosed, and 55 patients with 60 fingers were not. The difference of the superior rate and the incidence of venous crisis between superficial vein anastomosis and non-superficial vein anastomosis was compared by Chi-square test. The difference was considered as statistically significant when