Effect of shuanghuangbu on the adhesion growth and proliferation of human periodontal ligament cells on the zein stent / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To study the effect of Shuanghuangbu on the adhesion growth and proliferation of human periodontal ligament cells (HPDLCs) on the zein scaffold, and to study the feasibility of Shuanghuangbu zein used in the periodontal tissue engineering as a compound scaffold material.</p><p><b>METHODS</b>HPDLCs were cultured in vitro using the explants adherent method. Shuanghuangbu Decoction was prepared using water extraction and alcohol precipitation method. Zein scaffold was prepared using solvent casting/corpuscle leaching method, which was dispensed into Shuanghuangbu culture fluid at the concentration of 50, 100, 150, 200, 500, 1000 microg/mL, respectively. Shuanghuangbu of different concentrations groups, the zein scaffold leaching liquid group, and the cell control group were also set up. The effect of each group on the proliferation of HPDLCs was detected by MTT. According to results of MTT, the best concentration of Shuanghuangbu (100 microg/mL) was selected as the experiment group. Ten percent FBS of DMEM culture fluid was taken as the control group. The effect of Shuanghuangbu on the morphology of HPDLCs on the zein scaffold was observed using inverted phase contrast microscope and scanning electron microscope.</p><p><b>RESULTS</b>Compared with the zein scaffold leaching liquid group and the cell control group, the proliferation of HPDLCs could be promoted by different concentrations of Shuanghuangbu culture fluid, with the most obvious effect shown by Shuanghuangbu at 100 microg/mL (P<0.01). There was no obvious difference between the zein scaffold leaching liquid group and the cell control group (P>0.05), but their cell proliferation rates were positive values. The morphological results demonstrated that HPDLCs successfully grew on the zein scaffold. The number of HPDLCs under the action of Shuanghuangbu was more and the morphous was better.</p><p><b>CONCLUSIONS</b>Shuanghuangbu could promote the adhesion growth and proliferation of HPDLCs on the zein scaffold. Shuang- huangbu zein was feasible to be used in the periodontal tissue engineering as a compound scaffold materia.</p>

Role of the Chinese herbal medicine xianhuayin on the reversal of premalignant mucosal lesions in the golden hamster buccal pouch / 国际口腔科学杂志·英文版

<p><b>AIM</b>To investigate the role of the Chinese herbal medicine Xianhuayin on the reversal of 7,12-dimethylbenz[a]anthracene (DMBA)-induced premalignant mucosal lesions in the oral buccal pouch of golden hamsters.</p><p><b>METHODOLOGY</b>The animals were randomly divided into a non-diseased control group (n=5) and an experimental group including 50 animals in which the buccal mucosa had been painted with DMBA (0.5% in acetone) to generate an oral mucosa premalignant lesion. Animals in the experimental group were further divided into Xianhuayin-treated group (n=30), untreated premalignant lesion group (n=10) and normal saline (NS)-treated group (n=10). The cheek (buccal) pouch mucosa of the golden hamsters in each group was observed with light and electron microscopy eight weeks after intragastric administration with NS or Xianhuayin.</p><p><b>RESULTS</b>In the non-diseased control group, the buccal mucosa was keratinized and stratified squamous epithelium under a light microscope. In the untreated premalignant lesion group, variable degrees of epithelial dysplasia was observed. The irregular epithelial mucosa gradually became distinct in the Xianhuayin-treated group. Scanning electronic microscopic (SEM) analysis showed that surface of the cells exhibited honeycomb structures in the hamster of untreated-group. The cells were morphologically irregular, overlapped and loosened in the untreated premalignant lesion group. Most of the cell surface exhibited honeycomb structure in the Xianhuayin-treated group. Transmission electronic microscopic (TEM) analysis showed that buccal mucosal epithelial cells were morphologically regular in the non-diseased control group. Desmosomes and tonofibrils were reduced and the nucleus was morphologically irregular in the untreated premalignant lesion group. In the Xianhuayin-treated group, the widening intercellular gap was gradually reduced, desmosomes and the cells becoming morphologically regular. No significant difference was observed between the hamsters in NS-treated group and those in the untreated premalignant lesion group. Significant therapeutic efficacy was observed in the group receiving Xianhuayin.</p><p><b>CONCLUSION</b>Xianhuayin is effective in the reversal of DMBA-induced premalignant lesions in the buccal pouch of golden hamsters.</p>

Effects of Shuanghuangbu on the total protein content and ultrastructure in cultured human periodontal ligament cells / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Successful periodontal regeneration depends on the migration, proliferation and differentiation of periodontal ligament cells in periodontal defects. The total protein content and the ultrastructure demonstrate the metabolizability and activity of periodontal ligament cells. This study was conducted to observe the effects of Shuanghuangbu, a mixture of medicinal herbs, on the total protein content and the ultrastructure of human periodontal ligament cells.</p><p><b>METHODS</b>Periodontal ligament cells were grown to confluence and then cultured in Dulbecco's modified eagle medium (DMEM) supplemented with Shuanghuangbu over the concentration range of 0 to 1000 microg/ml. The total protein content in cultured cells was determined by using Coommasie brilliant blue technique. Periodontal ligament cells were incubated in 0 and 100 microg/ml Shuanghuangbu decoction for 5 days, then observed through transmission electron microscope.</p><p><b>RESULTS</b>The total protein content of human periodontal ligament cells increased in each experiment group added 10 - 1000 microg/ml Shuanghuangbu respectively, and the effect of 100 microg/ml was excellent. Under the transmission electron microscope, there were more rough endoplasmic reticulums and mitochodrias in the experiment group than those in the control group.</p><p><b>CONCLUSION</b>Shuanghuangbu stimulates the protein synthesis of human periodontal ligament cells and improves human periodontal ligament cells' metabolizability and activity.</p>