ABSTRACT
Psoriasis is a chronic non-contagious autoimmune disease. Gallic acid is a natural compound with potential health benefits, including antioxidant, anticancer, antiviral and antibacterial properties. Nevertheless, the influence of gallic acid on psoriasis has not been fully determined. This investigation aimed to discover the effect of gallic acid on psoriasis. Thirty-one pairs of psoriatic skin tissues and healthy adult human skin tissues were collected. Human keratinocytes (HaCaT cells) were transfected with interleukin 17A (IL-17A) to create the psoriatic keratinocyte model. The content of bromodomain-containing protein 4 (BRD4) microRNA was assessed using qRT-PCR testing. The content of BRD4 was detected by Western blotting. Cell migration was evaluated by conducting a wound healing assay. Cell proliferation was determined using an EdU assay. Apoptosis was detected by the TUNEL assay. The contents of interferon gamma (IFN-γ), IL-6, IL-8 and IL-17 were detected by ELISA. BRD4 was up-regulated in psoriatic skin tissues and in the IL-17A group compared to the healthy adult human skin tissues and the control group. Silencing BRD4 inhibited cell migration, proliferation and inflammatory response but induced apoptosis in IL-17A-treated HaCaT cells. Conversely, BRD4 over-expression promoted cell migration, proliferation and inflammatory response but suppressed apoptosis in IL-17A-treated HaCaT cells. Gallic acid repressed cell migration, proliferation and inflammatory response but indu-ced apoptosis in HaCaT cells transfected with IL-17A by down-regulating BRD4. Gallic acid represses cell migration, proliferation and inflammatory response but induces apoptosis in IL-17A-transfected HaCaT cells by down-regulating BRD4.
Subject(s)
Apoptosis , Cell Cycle Proteins , Cell Movement , Cell Proliferation , Gallic Acid , Inflammation , Keratinocytes , Psoriasis , Transcription Factors , Humans , Psoriasis/metabolism , Psoriasis/pathology , Psoriasis/drug therapy , Transcription Factors/metabolism , Cell Cycle Proteins/metabolism , Cell Cycle Proteins/genetics , Gallic Acid/pharmacology , Keratinocytes/drug effects , Keratinocytes/metabolism , Apoptosis/drug effects , Inflammation/pathology , Cell Proliferation/drug effects , Cell Movement/drug effects , Interleukin-17/metabolism , MicroRNAs/genetics , MicroRNAs/metabolism , Adult , Nuclear Proteins/metabolism , Nuclear Proteins/genetics , Male , HaCaT Cells , Female , Gene Expression Regulation/drug effects , Cell Line , Bromodomain Containing ProteinsABSTRACT
The aim of the present study was to investigate the efficacy of human umbilical cordderived mesenchymal stem cell (HUMSCs) embedded in platelet poor plasma (PPP) gel combined with amnion (PPPA) in improving wound healing on SpragueDawley (SD) rats. HUMSCs were cultured and labeled with chloromethylbenzamido1,1'dioctadecyl3,3,3'3'tetramethylindocarbocyanine perchlorate (CMDiI) on their third passage. The expression levels of growth factors of HUMSCs in PPPA were assessed by ELISA. Fullthickness excisional skin wounds were induced in 36 male SD rats, which were treated with PPPA grafted with HUMSCs (PPPAC), PPPA, or HUMSC or PBS injection. The degree of healing and the distribution of labeled HUMSCs in the wound were evaluated by hematoxylin and eosin (H&E) staining and immunofluorescence. On day 14 postsurgery, wound healing in PPPACtreated rats was significantly higher than the PPPA group, compared with rats treated with HUMSCs alone and control rats (P<0.05 and P<0.01, respectively). H&E staining showed that morphology and thickness of the epidermis in the PPPAC group was similar to that of healthy skin. ELISA revealed that levels of growth factors of HUMSCs in PPPAC were higher than in monolayer cells. In conclusion, PPPA can modify growth factor expression levels of HUMSCs and improve the efficiency of HUMSCs in the healing of full thickness wounds in rats.
