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Article in English | WPRIM | ID: wpr-825805


Objective:To detect the expression of thymic stromal lymphopoietin (TSLP) and IL-4, IL- 13 (interleukin-4, interleukin-13) through overexpression of microRNA-375 in allergic rhinitis (AR) mice.Methods:AR mice models with overexpression of miRNA375 were induced by ovalbumin (OVA) in Lentivirus overexpression vector AR group (Overexpression vector+OVA), lentivirus control vector AR group (Control vector+OVA) as well as AR (OVA) group. While saline was administered in control (Saline) group, nasal mucosa of each group were collected for further use. Relative expressions of TSLP and IL-4, IL-13 mRNA and proteins were detected by quantitative reverse transcriptase-polymerase chain reaction (RT-PCR) and western blot analysis.Results:Real-time fluorescence quantitative method verified the overexpression of miRNA375 in allergic rhinitis group, and the same method has been adopted to verify the expressions of IL-4 and IL-13 genes in the overexpression group. The relative expressions of TSLP and IL-4, IL-13 mRNA and protein decreased in overexpression of microRNA-375 nasal mucosa compared with AR group (P<0.05).Conclusions:The results indicated that the lentivirus in the nasal mucosa of mice with allergic rhinitis may affect the expression of IL-4, IL-13 and TSLP, and the expression of lentivirus in the nasal mucosa of mice with allergic rhinitis is different from that in the miR-375 lentivirus group. The expression of lentivirus in the nasal mucosa of mice with allergic rhinitis was different.

Article in Chinese | WPRIM | ID: wpr-698460


BACKGROUND:β-tricalcium phosphate (β-TCP) and monocalciumphosphate monohydrate (MCPM) are traditionally considered as reactants for dicalcium phosphate dehydrate (DCPD) bone cement,but little is reported on the hydroxyapatite (HA) as a reactant.OBJECTIVE:To verify whether HA and MCPM can be used to prepare DCPD bone cement and to explore the physicochemical properties.METHODS:The HA and β-TCP were prepared by wet chemical precipitation method,and mixed with appropriate proportion of MCPM.Then,the HA-DCPD and β-TCP-DCPD were obtained by adding a proper amount of curing water.The composition and structure of the two materials were analyzed by X-ray diffraction,the morphology was observed by scanning electron microscope,and the mechanical strength was tested by Instron5567 universal material test machine.These two kinds of materials were placed in simulated body fluid for detecting the weight loss ratio,soaked for 14 days and taken out for X-ray diffraction and scanning electron microscope detection.RESULTS AND CONCLUSION:X-ray diffraction findings indicated that these two kinds of materials both belonged to high-purity DCPD bone cement.Under the scanning electron microscope,β-TCP-DCPD bone cement had dense crystal structure,with less pore number;however,the HA-DCPD bone cement presented with finer grains,loose structure,and higher pore number.With the increase of curing time,the mechanical strength of two kinds of bone cements was correspondingly increased,but the compressive strength of β-TCP-DCPD bone cement was significantly higher than that of HA-DCPD bone cement (P < 0.05).In the simulated body fluid,the weight loss ratio of β-TCP-DCPD bone cement was significantly lower than that of HA-DCPD bone cement (P < 0.05).At 14 days after soaking in the simulated body fluid,a layer of spherical particles that was formed on the surface of both materials was identified as hydroxyapatite by scanning electron microscope observation and X-ray diffraction analysis.In summary,HA-DCPD bone cement has good biodegradability,excellent bioactivity and bone conductivity,but poor mechanical properties.

Article in English | WPRIM | ID: wpr-820491


OBJECTIVE@#To investigate the effect of Yupingfeng on hyaluronic acid (HA) and Foxp3(+) Treg in patients with nasopharyngeal carcinoma.@*METHODS@#A total of 58 cases of nasopharyngeal carcinoma were divided into two groups, 30 cases in the treatment group, 28 cases in the control group. Patients in two groups were treated with synchronous radiotherapy and chemotherapy treatment, the treatment group was treated with the Yupingfeng granules through oral administration, 10 g/time, tid for 2 courses. The serum Foxp3(+) Treg markers of each group were detected by flow cytometry assay before treatment and after treatment, and the level of HA in serum was detected by radio immunoassay.@*RESULTS@#After radiotherapy and chemotherapy, the contents of Foxp3(+) Treg and HA were significantly decreased in two groups (P < 0.05), and the decrease of treatment group was more significantly (P < 0.01). Correlation analysis showed positive correlation between Foxp3(+) Treg and HA (P < 0.05). After treatment, the incidence of side effects in two groups was significantly decreased. And there was significant difference between two groups (P < 0.05).@*CONCLUSIONS@#Combined chemotherapy and radiotherapy with Yupingfeng treatment can decrease the levels of Foxp3(+) Treg and HA in nasopharyngeal carcinoma patients. Yupingfeng can also effectively reduce the side effect due to radiation and chemotherapy.

Article in English | WPRIM | ID: wpr-819780


OBJECTIVE@#To explore effect of calcium citrate on bone integration in a rabbit femur defect model, and to compare the bone formation with different sizes by radiological and histological study.@*METHODS@#Twenty-four male Japanese white rabbits were randomly divided into three groups (Group A, B, C) in this study. Under anesthesia, defects of four sizes (1.2, 1.5, 2.0 and 2.5 mm) were created in each of the rabbits. Commercially pure calcium citrate powder was placed inside the medullary compartment of the femur (Experimental), while in the contralateral femur (Control) nothing was implanted. The defects were analyzed using radiography and histological analysis by using Imagepro-Plus 6.0 software after animal was sacrificed at 4th(Group A), 6th(Group B) and 8th(Group C) weeks postoperatively. Four samples were analyzed for each size of defect and each healing period.@*RESULTS@#The histological and the radiologic evaluation were performed after sacrification of all rabbits on postoperative 4th and 6th weeks, It showed significant difference between the experimental group and the control group when these defects were less than or equal to 2.0 mm. No statistical difference was observed when these defects were larger than 2.0 mm at all healing periods except at the 4th week.@*CONCLUSIONS@#Calcium citrate affects the early periods of bone defects healing mechanism in Japanese white rabbits positively, especially when the defect is not too large. We suggest further studies on calcium citrate to determine the effects of various dosages, administration ways and the experimental time on the bone defects.

Animals , Bone Density Conservation Agents , Pharmacology , Bone Regeneration , Calcium Citrate , Pharmacology , Femur , Diagnostic Imaging , Male , Rabbits , Radiography , Random Allocation , Wound Healing