Objective:To investigate the effects of ursolic acid (UA) on the proliferation and differentiation of osteoclasts (OC), and to explore its role in orthodontic force-induced root resorption and its relationship with OC.Methods:The mononuclear / macrophage cells RAW264.7 were induced to the OC.Tacrolimus acid phosphatase (TRAP) staining and bone resorption lacunae observation were used to identify the induction.CCK-8 method was used to select the appropriate concentration of UA for RAW264.7 cell-free biotoxicity and to observe its effect on the proliferation and differentiation of RAW264.7.In experimental groups, UA with gradient concentrations (1.0,2.5,5.0,10.0,20.0and 40.0 μmol·L-1)were added.UA was not added in control group.Results:The TRAP staining and bone resorption lacunae observation showed that after the RAW264.7 cells were induced for 5 d, the TRAP staining positive cells were found;the resorption lacunae were rounded,and oval, etc,the bottom wall was coarser,and the boundary was clear,which indicated that the RAW264.7 cells were successfully differentiated into the osteoclasts.The CCK-8 detection results showed that high concentration of UA (> 10.0 μmol·L-1) significantly inhibited the proliferation of OC;the appropriate concentration of UA (5.0 μmol·L-1) was in the biological safety concentration range and could inhibit the OC proliferation;low concentration of UA (<2.5 μmol·L-1) had no effect.Conclusion:RANKL can induce the differentiation and maturation of RAW264.7 cells.UA is correlated with the proliferation and differentiation of OC;UA has inhibitory effect on OC at the appropriate concentration (5.0 μmol·L-1) in a time-dependent manner.

OBJECTIVE:To investigate chemotherapeutic efficacy and safety of Paclitaxel combined with lobaplatin by inter-ventional embolization for cervical cancer. METHODS:Totally 68 cases of cervical cancer patients selected from our hospital dur-ing May 2010-Mar. 2014 were divided into control group and observation group according to therapy plan,with 34 cases in each group. Control group was given Paclitaxel liposome for injection 175 mg/m2 added into 5% Glucose injection 250 mL,ivgtt+Loba-platin for injection 80 mg/m2 added into 5% Glucose injection 250 mL,ivgtt. Observation group was given Paclitaxel liposome for injection 175 mg/m2+Lobaplatin for injection 80 mg/m2+5% Glucose injection 10 mL via percutaneous catheter after selecting uter-ine artery and tumor vessel by arterial catheterization arteriography,gelfoam embolization. Both groups were treated in the first day of every treatment course,21 d as a treatment course,for 3 courses. Clinical efficacies were observed in 2 groups as well as the levels of T lymphocyte subsets(CD4+,CD8+,CD4+/CD8+)before and after treatment. The occurrence of ADR during treatment,lo-cal recurrence and metastasis after 2 years,and survival situation were recorded. RESULTS:The total response rate of observatio group(85.29%)was significantly higher than that of control group(61.76%),with statistical significance(P<0.05). Before treat-ment,there was no statistical significance in the levels of CD4+,CD8+ or CD4+/CD8+ between 2 groups (P>0.05). After treat-ment,CD4+and CD4+/CD8+of 2 groups were increased significantly,while CD8+was decreased significantly;above indexes of ob-servation group were improved significantly compared to control group,with statistical significance (P<0.05). The survival time of observation group [(22.58±0.61)months] was significantly longer than that of control group [(17.61±1.32)months],and 2-year survival rate(70.59%)was significantly higher than control group(47.06%),with statistical significance(P<0.05). There were no statistical significance in incidence of disease control,incidence of total ADR and incidence of local recurrence and metastasis between 2 groups (P>0.05). CONCLUSIONS:Paclitaxel combined with lobaplatin by interventional embolization show definite chemotherapeutic efficacy for cervical cancer,and can improve the levels of T lymphocyte subset with good safety.