OBJECTIVE:To optimize the matrix formulation of ketoprofen cataplasm and to investigate its influencing factors.METHODS:Orthogonal design was used to design formulations,adhesive stress was tested with the tension meter and the per cutem permeability in vitro was studied using the franz diffusion cell.RESULTS:The optimal poultice was acquired with adhesive stress at40N and steady permeation flux at9.72?g/(cm 2 ?h).CONCLUSION:The established preparation technique of poultice is stable and feasible,and its leading influencing factors are adhesive stress and transdermal effects.

OBJECTIVE:To establish a method for content determination of matrine in it's liposomes by acid dye colorime_ try.METHODS:Sephadex gel G-50 column was established by swelling of matrine liposomes sample in distilled water for at least 12 hours,distilled water was used as mobile phase,after eluting,the column was mixed with 0.0 125%of bromothymol bl_ ue buffer solution and chloroform,and then the mixture was shaken,standing and demixed,the absorbability of chloroform layer was detected at the wavelength of 413 nm.RESULTS:The detection concentration of matrine showed good linearity with its absorbability within the range of 0.04～0.20mg/ml(r=0.9 972),the average recovery was 94.10%(RSD=1.86%).CONCL_ USION:The established method is simple and accurate,which can be used for quality control of matrine liposomes.

Objective To investigate whether poly arginine as the carrier can carry foreign proteins to penetrate the cell membrane and even penetrate the eyeball barrier.Methods Poly-Args (R9) was used as a CPP in this study.R9-green fluorescent protein (GFP) and GFP were constructed.In vitro,human lens epithelial cells were treated with these two proteins.Then,MTT assay were used to detect whether the protein could affect the proliferation of the cells.Flow cytometry and laser confocal microscopy were used to detect the penetrability of CPPs on the cells.In vivo,eyes of mice were treated with protein in eye drops way for 7 days.Then total protein were extracted,ELISA were used to detect the penetrability of CPPs.Results The results of MTT,flow cytometry and laser confocal microscopy showed that CPPs could carry protein into cells in a dose dependent manner without affecting cell proliferation.In vivo,slit lamp showed that the mice eyeballs had no any abnormal after treated by GFP,R9-GFP,and ELISA results also showed that R9 could effectively get foreign protein into the eyeball.Conelusion R9 can carry foreign protein into the cell membrane and eyeball barrier.This study provides the basis for the eye medication and dosing mode improvement.

OBJECTIVEThe aim of this study was to establish the average of superfacial masseter muscle of young females with normal occlusion, and further supply a clue for dentists to evaluate the muscle function of patients with malocclusion.

METHODSTotally 31 young females were investigated in this study, whose mean age was 21 years and 4 months old. Ultrasound technique was applied to obtain the ultrasound parameters of images, including area, width, mean thickness, maximal thickness of the cross-section and the length of the vertical-section of the masseter muscle under relaxing, maximal clenching and maximal protruding condition. The data were analyzed using ANOVA analysis.

RESULTSThe mean value and standard deviation of every parameter were figured out and it was found that there was a significant difference between relaxing and maximal clenching as well as maximal protruding.

CONCLUSIONThe result indicates that ultrasonic technique is an effective method for describing superfacial masseter muscle morphology and diagnosing its function.

Adult ; Dental Occlusion ; Female ; Humans ; Mandible ; physiology ; Masseter Muscle ; anatomy & histology ; diagnostic imaging ; Muscle Contraction ; Muscle Relaxation ; Ultrasonography

Objective:To establish the quality standard for Huashengping capsules. Methods: Milkvetch Root, Hedyotis diffusa Willd and Salvia miltiorrhiza were identified by TLC. The content of astragaloside A was detected by HPLC. The column was Kormasil C18(250 mm ×4.6 mm, 5 μm) and the flow rate was 1.0 ml·min-1. The mobile phases was a mixture of acetonitrile-water (32∶68 ) . The detection wavelength was 203 nm. The column temperature was 25℃ and the sample size was 20μl. Results:The TLC chro-matography spots were clear. Astragaloside A was linear within the range of 2. 000-10. 000 μg(r=0. 999 6) and the average recovery was 100. 8%(RSD=1. 9%,n=6). Conclusion:The method is simple, accurate and reliable, which can be used in the quality con-trol of Huashengping capsules.

OBJECTIVETo probe into the function of stem cell antigen-1 (Sca-1) in cell proliferation and differentiation.

METHODSSca-(1+) and Sca-(1-) muscle derived cells were separated from C57BU6 mice by fluorescence-activated cell sorting and then cultured in vitro. After 5 days cells proliferative curve were drawn according CCK-8 experimental results. Western blot also were done to detect Sca(-1), MyoD and Myogenin expression in cultured Sca(-1+) and Sca-(1-) muscle derived cells.

RESULTSThe difference of the proliferative curve of Sca-(1+) and Sca-(1-) muscle derived cells cultured 3 days in vitro was not apparent, but Sca-(1-) muscle derived cells had a accelerated division rate in the follow days compared to the Sca-(1+) muscle derived cells. Sca-1 expression in both cells was not obvious. MyoD and Myogenin expression were stronger in Sca-(1+) than Sca-(1-) muscle derived cells.

CONCLUSIONSca-1 expression in muscle derived cells takes a period of time that related to the beginning and ending of the cell cycle.

Animals ; Antigens, Ly ; Cell Differentiation ; Cell Proliferation ; Cells, Cultured ; Flow Cytometry ; Membrane Proteins ; Mice ; Muscle, Skeletal ; Myogenin ; Stem Cells

Polyhydroxyalkanoates (PHAs), as a novel class of biopolymer, are attracting more attention due to their diverse material properties and environment-independent biodegradability. Here we report the preparation of PHA exhibiting efficient antibacterial activity by embedding Nisin, a food additive generally recognized as safe, into poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx), a type of PHA with high biocompatibility. We first prepared Nisin-containing PHBHHx films using solvent casting method. Confocal laser scanning microscopy analysis showed that a well-mixed integrated structure of the films with an even distribution of the Nisin particles in the PHBHHx matrices. Then the antimicrobial activity of PHBHHx/Nisin films against Micrococcus luteus was quantified on agar plate by measuring the size of inhibition zone. Cultivation in liquid media further confirmed the releasing of Nisin from the films and the long-time antibacterial activity. Results showed that the threshold of Nisin concentration for long-time and effective inhibition against bacteria growth is 25 μg/g. These results altogether establish a technological foundation for the application of PHA in biomedicine and food industry.
3-Hydroxybutyric Acid ; chemistry ; Anti-Bacterial Agents ; chemistry ; Caproates ; chemistry ; Micrococcus luteus ; drug effects ; Nisin ; chemistry ; Polyhydroxyalkanoates ; chemistry

Sodium humate (HA-Na) has been topically used as a wound healing and anti-inflammatory agent in folk medicine. In the present study, HA-Na was investigated for cutaneous wound healing in Sprague-Dawley rats. HA-Na solution (1.0%, w/v) was topically administered to rats undergoing excision wound models. Healing was assessed with a recombinant bovine basic fibroblast growth factor for external use as positive control. Wound healing rates were calculated on Day 3, 6, 9, 14 and 21 after injury, and tissues were also harvested after the same intervals for histological analysis. In addition, tissue hydroxyproline levels were measured. Furthermore, mRNA levels and protein expressions of transforming growth factor-β1, 2, 3 (TGF-β1, 2, 3) were determined by RT-PCR and western blot. Protein expression levels of Smad-2, -3, -4 and -7 were also detected by western blot. Our study demonstrates that HA-Na has the capacity to promote wound healing in rats via accelerated wound contraction and increased hydroxyproline content. More importantly, these wound healing effects of HA-Na might be mediated through the TGF-β/Smad signaling pathway. HA-Na may be an effective agent for enhanced wound healing.