BACKGROUND:The mechanical index is an important method for the evaluation of the therapeutic efficiency of drug treatment for osteoporosis animal models. OBJECTIVE: To explore the effects of various drug treatments on osteoporosis through a mechanical performance test about the femoral compression of rats. METHODS: Thirty-six Wistar female rats were randomized into six groups: normal control group, model group, Dan Qiparticles group, alpha-D3 group, premarin group, ipriflavone group, with six rats in each group. Osteoporosis models were made in al groups except for the normal control group, and after modeling, the rats in different groups were treated withDan Qi particles, alpha-D3 group, premarin and ipriflavone, respectively. After 15 weeks, the rats were kiled by abdominal aortic bloodletting to take out the left and right femurs that were placed on a universal testing machine to perform a compressive test at a speed of 5 mm/min. RESULTS AND CONCLUSION:The maximum load, maximum stress, maximum displacement, maximum strain, and elastic modulus were significantly lower in the model group than the other four groups (P < 0.05). There was no difference in different mechanical parameters between alpha-D3 group and model group as wel as between Dan Qi particles group and normal control group (P> 0.05). These findings indicate that osteoporosis leads to the variation of compression mechanical properties of the femur. There are good compression mechanical properties of the femur after treatment with premarin and ipriflavone, andDan Qi particles has the best effect.

Objective To determine the prevalence of gastroesophageal reflux disease (GERD) in patients with idiopathic pulmonary interstitial fibrosis (IPIF). Methods From December 2006 to January 2008, 24 consecutive patients with IPIF admitted to Beijing Chaoyang Hospital underwent 24-hour esophageal pH monitoring and esophageal manometry. Meanwhile, 23 patients with diffuse parenchymal lung disease (DPLD) (excluding IPIF) admired to the hospital in the same period served as a control group. Comparison of the prevalence of pathologic esophageal acid exposure GERD symptoms, and ineffective esophageal motility (IEM) between the two groups was made. In this study, nocturnal acid exposure is defined as acid reflux episodes occurring from 10pro to 6am. Results (1) 16 out of the 24 (66. 7%) patients with IPIF were demonstrated to have pathologic esophageal acid exposure; the prevalence of GERD in IPIF patients was significantly higher than that in other DPLD patients, whose prevalence was 26. 1% (P<0.05); (2) 87.5% patients with IPIF and GERD (GERD-IPIF) had nocturnal acid exposure episodes; (3) only 37.5% of the GERD-IPIF patients was found to have typical GERD symptoms such as heartburn and regurgitation; (4) The prevalence of IEM was similar in IPIF and other DPLD patients, being 42.9% and 39. 1% respectively (P >0. 05). Conclusions IPIF patients have higher prevalence of GERD and most of them usually do not show typical reflux symptoms. It is hereby suggested that IPIF patients should be screened with pH monitoring for GERD.

Objective To observe the effect of jiaweibugan decoction on VEGF expression of sciatic nerve in experimental diabetic rat and explore the preventive and therapeutic effects of iiaweibugan decoction on peripheral neumpathy in~xperimental diabetic rats.Methotis The diabetic rat model was established by streptozotocin(STZ).The rats were killed on the 4th or 8th week from the beginning of treatment respectively,and VEGF mRNA of sciatic nerve was detected by reverse-transcriptase polymerase chain reaction(RT-PCR).Resuits The results of RT-PCR showed that VEGF expression ofthe model group and treated group on the4th or8th week WaS higherthan that of the normal control group(P＜0.05).Compared with the model group,VEGF expression in the diabetic rats treated byjiaweibugan decoction increased markedly at the end of4th week(P＜0.05),while decreaSed significantly at the end of8th week(P＜0.05).Conclusion Jiaweibugan decoction has a proventive and therapeutic effect on peripheral neumpathy in experimental diabetic rats.

Objective To investigate the therapeutic effect of frozen-thawed murine islets which were transplanted into diabetic rats after cultured with hyperbaric oxygenated rotary cell culture system (HORCCS). Methods The purified rat islets were divided into two groups: A. In vitro experiment groups (IvEG) : The rat islets in each subgroup were cultured in HORCCS or common medium for 30 days, then evaluated for the intracellular DNA and insulin contents of islets, and the viability and insulin secreting level of islets. B. Islet transplantation experimental groups (TxEG) : The frozen-thawed islets were cultured in HORCCS or common medium for 7 days, and then transplanted into the recipients. We observed the blood glucose level (BGL) and insulin secreting level in the recipients as well as the uhrastructure change of islets in TxEG. Results The viability and insulin secreting level of islets cultured with HORCCS at 14th day were much higher than those cultured with common medium (P <0.05). The blood glucose level in recipients transplanted with islets cultured with HORCCS recovered to normal value at the 2nd week and lasted for 8 weeks. All these recipients maintained the normal glucose tolerance curve. Electronic microscopy found microchannel outlets on the surface of the frozen-thawed islets cultured with HORCCS. Conclusions Frozen-thawed islets cultured with HORCCS could establish nutrient transmission microchannels, which were not only capable of oxygen and nutrients transmission, but also improving cryopreservation solution to diffuse inside the islet cells evenly and uniformly. So this method not only lessens islet damage from cryopreservation, but also improves the effect of transplantation.

Objective To investigate the effects of dexmedetomidine on oxidative stress response after operation in patients with acute craniocerebral trauma. Methods Sixty patients who underwent intracranial hematoma and decompressive craniectomy within 24 h after acute craniocerebral trauma,were randomly divided into midazolam group and dexmedetomidine group(n=30). All patients were maintained seda-tion for 12 h after operation. Mean arterial blood pressure (MAP),heart rate (HR),blood glucose,S-100B protein (S-100B),malond-ia1ehyde(MDA) and superoxide dismutase (SOD) were recorded at the end of operation(T0),3 h(T1),6 h(T2),12 h(T3) after opera-tion. Results Postoperative MAP, HR and blood glucose were stability in two groups. MAP, HR and blood glucose of dexmedetomidine group were lower than those of midazolam group(P<0. 05). The serum concentrations of S-100B and MDA gradually reduced,and the serum levels of SOD gradually increased at T1 ~T3 in two groups. Compared with midazolam group, these changes were significantly higher in dexmedetomidine group(P<0. 05). Conclusion Dexmedetomidine can protect the brain by maintaining haemodynamic stability and attenu-ating oxidative stress response after operation in patients with acute craniocerebral trauma.

To investigate the protective effects of scutellarin benzyl ester on neonatal rats' cardiomyocytes injured by ischemia and its anti-apoptosis mechanism.

Objective To analyze the characteristic of trauma in 246 fatal falls. Methods We collect 246 cases of fatal falls from Pudong district of Shanghai from 2005 to 2014, and then analyze the characteristics of trauma by using different parameters. Results The height in suicides by fall is higher than accidents by fall (25.7m:13.98m). In all fatal falls, head has a higher possibility in suffering trauma than other body regions (75.2%), while neck has a lower possibility (6.5%). The possibility of head trauma in accidents by fall is higher than suicides by fall (89.4%:75.2%). Conclusion Comparing with suicides by fall, victims in accidents by fall have lack of protection from limbs. Besides, the low rate of ifnding neck trauma suggests legal physicians should be more careful in examining this area.

ObjectiveTo determine the mechanism of Yitangkang in correcting excessive apoptosis of skeletal muscle cells to improve insulin resistance （IR） by inhibiting the advanced glycation end product （AGE）/receptor for the advanced glycation end product （RAGE） signaling pathway. Method① In vitro experiments. Yitangkang-medicated serum was prepared. C2C12 cells were divided into a blank group， a model group， high-， medium-， and low-dose Yitangkang-medicated serum groups （40， 20， and 10 g·kg^-1）， and a RAGE inhibitor group. The IR model was induced by palmitic acid in C2C12 cells except for those in the blank group. After the corresponding intervention methods were conducted，the cell viability and glucose consumption level of each group were determined. In addition，the apoptosis rate was determined using flow cytometry. The mRNA and protein expression levels of the important apoptotic proteins ［B-cell lymphoma 2 （Bcl-2）， Bcl-2-associated X protein （Bax）， p53， cysteinyl aspartate-specific protease-3 （Caspase-3）， and cysteinyl aspartate-specific protease-9 （Caspase-9）］ were determined using Real-time fluorescence quantitative polymerase chain reaction （Real-time PCR） and Western blot. ② In vivo experiments. Ninety-six eligible Wistar rats were divided into a blank group， a model group， high-，medium-，and low-dose Yitangkang groups （40， 20， and 10 g·kg^-1）， and a western medicine group （pioglitazone hydrochloride，1.35 mg·kg^-1）. The IR model was induced using high-glucose and high-fat feed for diabetes combined with intraperitoneal injection of low-dose streptozotocin （STZ） in animals and verified by the hyperinsulinemic-euglycemic clamp （HEC） test. After the model was determined successfully， the rats in each group were given intragastric administration of drugs as required. Terminal deoxynucleotidyl transferase dUTP nick end labeling （TUNEL） assay was performed to determine the number of positive apoptotic cells in the skeletal muscle tissues of rats in each group，while Real-time polymerase chain reaction（Real-time PCR） and Western blot were performed to determine the mRNA and protein expression levels of the important apoptotic proteins Bcl-2， Bax， p53， Caspase-3， and Caspase-9. Result① In vitro experiments. compared with the blank group， the model groups showed increased apoptosis rate of C2C12 cells and decreased cell viability and glucose consumption （P<0.01）. Compared with the model group， the Yitangkang-medicated serum groups and the RAGE inhibitor group showed decreased apoptosis rate of C2C12 cells and increased cell viability and glucose consumption （P<0.01）. Compared with the blank group， the model group showed decreased expression levels of Bcl-2 mRNA and protein in C2C12 cells and increased mRNA and protein expression levels of Bax， p53， Caspase-3， and Caspase-9 （P<0.01）. Compared with the model group， the Yitangkang-medicated serum groups and the RAGE inhibitor group showed increased expression levels of Bcl-2 mRNA and protein in C2C12 cells （P<0.01） and decreased mRNA and protein expression levels of Bax， p53， Caspase-3， and Caspase-9 （P<0.05， P<0.01）. ② In vivo experiments. The number of positive apoptotic cells in the skeletal muscle tissues of rats in the model group significantly increased as compared with that in the blank group （P<0.01）. The number of positive apoptotic cells in the skeletal muscle tissues of rats in the Yitangkang groups and the western medicine group decreased as compared with that in the model group （P<0.01）. Compared with the blank group， the model group showed decreased expression levels of Bcl-2 mRNA and protein in skeletal muscle tissues of rats and increased mRNA and protein expression levels of Bax， p53， Caspase-3， and Caspase-9 （P<0.01）. Compared with the model group， the Yitangkang groups and the western medicine group showed increased expression levels of Bcl-2 mRNA and protein in skeletal muscle tissues of rats （P<0.01） and decreased mRNA and protein expression levels of Bax， p53， Caspase-3， and Caspase-9 （P<0.05， P<0.01）. The medium-dose Yitangkang showed a similar effect as RAGE inhibitor， and the effect was equivalent to that of pioglitazone hydrochloride. ConclusionYitangkang can inhibit skeletal muscle cell apoptosis by inhibiting the AGE/RAGE signaling pathway.