Objective To investigate the relationship between age and biochemical markers of bone absorption and bone formation in old men. Methods Urinary deoxypyridinoline crosslinks (Dpd),calcium (Ca),serum bone g1aprotein (BGP),procollagen I C terminal peptides (PICP) and testosterone (Tes) were determined by ELISA. Urinary hydroxyproline (Hyp) was tested by HPLC,and bone specific alkaline phosphatase (BALP) was assayed by electrophoresis. The data from 210 old man were compared with those of postmenopausal women and young men. Results As the age increased in old men, the levels of bone absorption markers increased (Dpd:12.6%,Hyp:23.5%), and bone formation markers decreased (BGP:3.1%,PICP:45.9%).The average level of Dpd in old men was (4.53?1.34) nmol/mmolCre, lower than that of postmenopausal women [(7.90?3.27) nmol/mmolCre] and young men [(6.78?3.31) mol/mmolCre], t test P

Objective: To investigate the childrens congenital and acquired nutritional status and the physical development among the different nationalities in Guizhou province; to find out the factors that greatly influence the childrens physical development. Methods: Investigations were carried out on the diet, height and the weight of the mothers during the early and late stage of their pregnancy and after the delivery of the babies. Results: The living conditions in the groups of Miao and Buyi were very poor. For the pregnant women among Han, Miao and Buyi groups, during their middle and late stage of the pregnancy, the intakes of protein, calcium and VB 2 did not reach 80% RDA. For the 2-4 years old children, the intake of protein was below 80% RDA. For those in Miao and Buyi groups, the chief source of protein was from cereals. There was a great insufficient intake of calcium and VB 2 in different age groups of the children mentioned above. With the increase of age, the infants of Buyi and Miao groups were gradually diverting from the standard criterion from 3rd or 4th month. The greatest difference was in Miao group, i.e. at the age of 6, the difference in height was 9.8 cm(male), 8.3 cm(female); the difference in weight was 1.64 kg(male), 1.92 kg(female). Conclusion: The physical development of the infants in Buyi and Miao groups is inferior to those in Han group. Besides the environmental influence, the quality and quantity of the protein in diet play an important role in physical development.

Objective To apply team based learning (TBL) in the teaching of dental endodontics for undergraduates in order to expand and deepen the TBL teaching in stomatology education.Methods TBL was used among 2008 grade oral undergraduates in Chongqing Medical University.Average test scores of 2008 grade undergraduates before and intra class were calculated and questionnaire was designed.At the same time,final examination scores between 2007 grade and 2008 grade under-graduates were compared.Results There was no significant correlation in average test scores before and intra class (r =0.027,P ＞ 0.05).Final examination scores were higher in 2008 grade than in 2007 grade.Based on the questionnaire survey,learning interests,sense of teamwork and classroom knowledge grasp of 2008 grade undergraduates were obviously elevated.Conclusions TBL teaching significantly improve students' learning effect and it can be promoted in stomotology education.

Tooth germ injury can lead to abnormal tooth development and even tooth loss, affecting various aspects of the stomatognathic system including form, function, and appearance. However, the research about tooth germ injury model on cellular and molecule mechanism of tooth germ repair is still very limited. Therefore, it is of great importance for the prevention and treatment of tooth germ injury to study the important mechanism of tooth germ repair by a tooth germ injury model. Here, we constructed a Tg(dlx2b:Dendra2-NTR) transgenic line that labeled tooth germ specifically. Taking advantage of the NTR/Mtz system, the dlx2b⁺ tooth germ cells were depleted by Mtz effectively. The process of tooth germ repair was evaluated by antibody staining, in situ hybridization, EdU staining and alizarin red staining. The severely injured tooth germ was repaired in several days after Mtz treatment was stopped. In the early stage of tooth germ repair, the expression of phosphorylated 4E-BP1 was increased, indicating that mTORC1 is activated. Inhibition of mTORC1 signaling in vitro or knockdown of mTORC1 signaling in vivo could inhibit the repair of injured tooth germ. Normally, mouse incisors were repaired after damage, but inhibition/promotion of mTORC1 signaling inhibited/promoted this repair progress. Overall, we are the first to construct a stable and repeatable repair model of severe tooth germ injury, and our results reveal that mTORC1 signaling plays a crucial role during tooth germ repair, providing a potential target for clinical treatment of tooth germ injury.
Animals ; Mice ; Mechanistic Target of Rapamycin Complex 1/pharmacology* ; Signal Transduction ; Tooth/metabolism* ; Tooth Germ/metabolism* ; Odontogenesis

OBJECTIVE：To observe the safety and other related indexes of canagliflozin in the treatment of type 2 diabetes complicated with high risk of cardiovascular disease. METHODS ：Totally 306 patients，admitted to Hainan Provincial People ’s Hospital and Haikou People ’s Hospital ，with type 2 diabetes complicated with high risk of cardiovascular disease were selected from Dec. 2018 to Apr. 2019. They were divided into observation group （153 cases）and control group （153 cases）according to random number table . The control group was treated with in sulin，metformin or sulfonylureas conventional hypoglycemic therapy ， and the observation group was treated with Canagliflozin tablets 100 mg，once a day ，po，on the basis of control group. The course of treatment was 1 year in both groups. The levels of HbA 1c，BMI，SBP，DBP and eGFR before and after treatment were observed in 2 groups，and the incidence of safety （including death from cardiovascular causes ，myocardial infarction ，ischemic stroke ， hospitalization for heart failure and death from any cause etc. ） after treatment and serious ADR/ADE （including hypogly- cemia，diabetic ketoacidosis ，fracture，acute kidney injury 68622942。E-mail：zhaixin0123@126.com etc.）during the treatment were recorded. RESULTS ：A total of 5 patients in the control group were not followed up ， in which 3 quited and 2 were lost ；and 4 patients in the observation group were not followed up ，in which 1 quited and 3 were lost . Before treatment ，there were no statistical significance in the levels of HbA 1c，BMI，SBP，DBP and eGFR between 2 groups（P＞0.05）. After treatment ，HbA1c levels of 2 groups，BMI and SBP of observation group were all significantly lower than those before treatment with the same group ；HbA1c level and SBP of observation group were significantly lower than those of control group （P＜0.05）. eGFR levels of 2 groups after treatment were significantly higher than before treatment with the same group ，while the observation group was significantly higher than that of contrl group. The incidence of death from cardiovascular causes and death from any cause in observation group were significantly lower than control group （P＜0.05）. There were no statistically significant differences in other safety indexes and the incidence of serious ADR/ADE between 2 groups（P＞0.05）. CONCLUSIONS ：Canagliflozin can significantly reduce the incidence of death from cardiovascular causes and death from any cause in type 2 diabetes patients complicated with high risk of cardiovascular disease，ameliorate blood glucose and blood pressure ，and do not increase the occurrence of serious ADR/ADE.