Effect of tacrolimus on the growth cycle of murine hair follicles / 中国医学科学院学报

<p><b>OBJECTIVE</b>To explore the effect of tacrolimus on murine hair follicle cycle.</p><p><b>METHOD</b>Hematoxylin-eosin dyeing and reverse transcription-polymerase chain raction techniques were used.</p><p><b>RESULTS</b>Five days after depilation, the hair follicles in both the tacrolimus group and the minoxidil group was in anagen V, while that in the vaseline group was in anagen III. vascular endothelial growth factor (VEGF) and hepatocyte growth factor (HGF) were detected in back skin in both the tacrolimus group and the minoxidil group, but not in the vaseline group.</p><p><b>CONCLUSION</b>Tacrolimus can promote the growth of hair by stimulating the hair follicle to enter anagen V in mice, which may be explained by the effects of VEGF and HGF.</p>

Effect of hypoxia inducible factor-1alpha on cells of hair follicle / 中国医学科学院学报

<p><b>OBJECTIVE</b>To investigate the feasibility of stable transfection of human hypoxia inducible factor-1alpha (HIF-1alpha) gene into fibroblasts cells and the effects of supernatant from the transfected cell culture on hair follicle cells.</p><p><b>METHODS</b>PcDNA-HIF1alpha was stably transfected into fibroblasts cells with lipofectamine 2000. Expression of HIF-1alpha was observed by reverse transcription-polymerase chain reaction (RT-PCR) and Western blot. The supernatant was obtained to detect the expression of vascular endothelial growth factor (VEGF) by ELISA. The mRNA expression of basic fibroblast growth factor (bFGF) was detected by RT-PCR. MTT was used to detect the activity of fibroblasts cells and dermal sheath cells added with supernatant.</p><p><b>RESULTS</b>PcDNA-HIF1alpha was successfully transfected into fibroblasts cells. HIF-1alpha could be detected by RT-PCR and Western blot. The expression of VEGF in the supernatant of cells transfected with PcDNA-HIF1alpha was detected. The mRNA expression of bFGF was significantly higher than in the control group (P < 0.01). MTT showed the activity of cells added with supernatant was enhanced (P < 0.05).</p><p><b>CONCLUSION</b>PcDNA-HIF1alpha can stably transfected into fibroblasts cells, and the expressed HIF-1alpha induces the expression of VEGF and bFGF, and the expressed VEGF enhances the activity of cells.</p>