OBJECTIVES: This study aimed to explore the impact of cell spreading area on odontoblast polarization and differentiation using micropatterned surfaces ge-nerated by photolithography. METHODS: Micropatterned surfaces with differential adhesive properties were prepared using polyethylene glycol diacrylate (PEGDA)-ba-sed photolithography. Human dental pulp stem cells (hD-PSCs) were isolated into single cells and cultured on micropatterned surfaces with areas of 1 800, 2 700, and 3 600 μm². Immunofluorescence staining was used to observe cell morphology and analyze the relocating of the golgi apparatus and nucleus. Alkaline phosphatase staining was preformed to examine odontogenic differentiation. RESULTS: The hDPSCs were successfully isolated and cultured on micropatterned surfaces mimicking the morphology of polarized odontoblasts. Phalloidin staining confirmed that the isolated hDPSCs successfully recapitulated the morphology of predesigned micropatterns. Immunofluorescence staining showed that the polarization and differentiation levels of the hDPSCs with a 3600 μm² area were significantly higher than those with 1 800 and 2 700 μm² areas (P<0.05). CONCLUSIONS The polarization and differentiation of single hDPSCs increased with the cell areas on micropatterned surfaces.
Cell Differentiation ; Humans ; Dental Pulp/cytology* ; Odontoblasts/cytology* ; Stem Cells/cytology* ; Cells, Cultured ; Cell Polarity ; Surface Properties

Objective:Based on the National Patent Database, this paper analyzes the medication rule of Traditional Chinese Medicine (TCM) compound patents for the treatment of colorectal cancer in the past 10 years.Methods:By searching for and extracted screening out TCM compound patents for the treatment of colorectal cancer and after the dada selection, data entry , data specifications, the compound patents database for the treatment of colorectal cancer was established. then used IBM SPSS Modeler and IBM SPSS Statistics software to perform frequency analysis, attribute analysis, association analysis and cluster analysis of TCM.Results:A total of 97 compound patents were included, including 411 TCM, among which the core medicines are Atractylodis macrocephalae rhizoma, Hedyotis diffusa, Astragali radix, Glycyrrhizae radix et rhizoma, Scutellariae barbatae herba, Poria, etc. The medicine is mainly cold and warm; The medicine mainly tastes bitter and sweet; The spleen meridian is the main meridian. The cluster analysis result shows there are 7 categories, and the paired TCM with strong correlation includes Hedyotis diffusa- Scutellariae barbatae herba, Atractylodis macrocephalae rhizoma- Curcumae rhizoma, Astragali radix- Codonopsis radix and so on. Conclusions:Treating colorectal cancer should take those medicine which could invigorate the spleen and nurture the deficiency, such as Atractylodis macrocephalae rhizoma, Astragali radix, Codonopsis radix, while for clearing away heat, detoxifying, promoting blood circulation and removing blood stasis, such as Hedyotis diffusa, Scutellariae barbatae herba, and Curcumae rhizoma. At the same time, it can be combined as appropriate, attacking and replenishing simultaneously, regulating qi and blood.

Objective: The antitumor mechanism of Pleurotes sapidus on 4 kinds of tumor cell lines was studied. The active components of its ethanol extracts were studied. Methods:Using techniques of cell culture in vitro, phytochemical methods, FACS and RT-PCR, expressions of p53 and fas gene of four tumor cell lines treated with Pleurotas sapidu were analysed. Results:The apoptosis rates were remarkably increased after treated by ethanol extracts (0.1g/ml) and water extracts (0.1g/ml) for 12 h and 24 h respectively. The expression of P53 protein in the groups of ethanol and water extracts were significantly increased, and the gene expressions of p53 and fas were aslo highly up-regulated. Conclusion:The antitumor effect of Pleurotas sapidus on tumor cell lines in vitro is evident, and its mechanisms are probably associated with the regulation of apoptosis by inducing the gene expressions related to apoptosis.