Adult ; Anti-Inflammatory Agents, Non-Steroidal ; therapeutic use ; Arthritis, Rheumatoid ; diagnosis ; drug therapy ; Drugs, Chinese Herbal ; therapeutic use ; Female ; Humans ; Male ; Middle Aged ; Phytotherapy ; Spondylitis, Ankylosing ; diagnosis ; drug therapy ; Tripterygium ; chemistry

Recent epidemiologic data indicate that metfomin has an anti-tumor effect.However,the underlying anti-tumor mechanisms remain unclear.MicroRNAs (miRNAs)can exhibit pro-oncogenic or anti-oncogenic effects by regulating the differentiation and proliferation of cells.In vitro studies show that metformin can regulate the expressions of multiple miRNAs which are closely associated with tumor development,a process possibly relating to the anti-cancer roles of metformin.

OBJECTIVETo discuss the mechanism of superfine comminution of traditional Chinese medicine (TCM) at low temperature.

METHODGlycyrrhiza uralensis roots were at room superfinely comminuted temperature and at low temperature by cryogenic vibration mill. The superfine powders were observed and analyzed by laser particle size analyzer and SEM.

RESULTThe powder processed at low temperature was of smaller effective diameter and narrower size distribution and was also with smoother surface and smaller angle of repose.

CONCLUSIONThe G. uralensis roots could be superfinely comminuted with high efficiency and simple procedure by vibration mill at low temperature.

Glycyrrhiza uralensis ; Particle Size ; Plant Roots ; Plants, Medicinal ; Powders ; Technology, Pharmaceutical ; instrumentation ; methods ; Vibration

Adult ; Air Pollutants, Occupational ; poisoning ; Humans ; Male ; Middle Aged ; Occupational Diseases ; etiology ; Occupational Exposure ; adverse effects ; Pneumoconiosis ; etiology ; Silicon Dioxide ; poisoning

Objective: To study the effects of the melt casting and the sintering methods on the machinability and other characteristics of K_2O-MgO-MgF_2-SiO_2 glass-ceramics. Methods: X-ray diffraction(XRD) and scanning electron microscopy (SEM)were used to examine the main crystal and the microstructure of the glass ceramics of the same composition which were made by melt casting and sintering methods, respectively. The transmissivity, flexural strength and brittleness index were observed respectively. Results: The glass ceramics made by two different methods have the same crystal, KMg_(2.5)Si_4O_(10)F_2, while the specimen prepared by the sintering method had lower transmissivity,better machinability and mechanical properties due to the higher mica volume percent. Conclusion; For production of fluoro-mica glass ceramics, sintering method has superiority compared to melt-casting method.

Objective Precondition is an approach to myocardial protection during ischemia-reper-fusion by inhibiting myocardial cell apoptosis.The purpose of this study was to evaluate the cardioprotective effect using 99Tcm-syuaptotagmin I (Syt I)-C2A to detect myocardial cell apoptosis in the myocardial is-chemia-repedusion rat model.Methods (1) The C2A domain of Syt I was labeled with 99Tcm using 2-iminothiophene hydrochloride (IT) method.Radiochemical purity was determined with thin layer chroma-tography.The binding activity of radiolabeled protein was assessed using eamptothecin-treated Jurket cells.(2) One group of 6 rats was prepared for myocardial ischemia-reperfusion model(A group),and another group of 6 rats was prepared for myocardial ischemia precondition model(B group).99Tcm-Syt I-C2A was injected via the tail vein at a dosage of about 7.4 MBq.At 1h after injection,the rat was sacrificed,and the heart was removed to rinse with saline and dye with triphenyl tetrazolium eoride (TTC).According to the resdt of myocardial dye,theischemic myoeardium was separated from the viable myocardium and weight was measured,and then its radioactivity was determined by gamma counting.The difference of radioactive uptake in the ischemic myocardium between these two group models was compared using percentage activity of injection dose per gram of tissue(%ID/g)±standard deviation(x±s).SPSS 12.0 was used for data analy-sis,and t-test was used to compare data.Results (1) The radiochemical purity of 99Tcm-Syt I-C2A was (98.90±0.43)%,and the radioactivity in the camptothecin-treated group was (10.99±0.55) folds higher than that of non-treated viable control group.(2)In the ischemia-reperfusion model,the radioactive uptake of 99Tcm-Syt,I-C2A was(2.41±0.32)%ID/g in the ischemic myocardium,and(0.16±O.02)%ID/g in the nomud myocardiunm.However,in the myocardial ischemia precondition model,(0.46±0.05)%ID/g in the isehemic myocardium was measured,and(0.20±0.05)%ID/g in the normal myocardium.Uptake of 99Tcm-Syt I-C2A in ischemic myocrdium showed statistically significant difference (t=8.52,P

Objective To determine the variation of bone mineral density(BMD)and bone mineral content (BMC)in cadaveric lumbar vertebrae and investigate their significance in determining fracture modes and biomecha- nical properties.Methods The lumbar motion segments of the spines of 19 cadavers(mean age:56 years)were compressed to failure.The BMD and BMC of the cranial and caudal endplates were determined,along with the BMD and BMC of the upper and lower 1/3 transverse sub-endplate layers and the middle 1/3 transverse layer.The anteri- or,middle and posterior 1/3 vertical parts,anterior and posterior 1/2 vertical parts and the whole BMD and BMC were measured by using dual energy X-ray absorptiometry as well.All the data were analyzed statistically.Results Among the 19 segments,macrography after dissection revealed that 16 had been fractured,about 84.2%.The frac- ture always occurred in the centre or in the anterior part of the endplate.Within a vertebral body,the BMD and BMC of the cranial endplate were less than those of the caudal endplate,and the cranial 1/3 transverse layer and middle layer had lower BMD and BMC readings than the caudal layer.For the vertical region,from the anterior 1/3 to the posterior 1/3,or from the anterior 1/2 to the posterior 1/2,the BMD and BMC increased.For the endplate around the disc,the BMD of upper endplate was higher than that of the lower one,but the BMCs were equal.In one motion segment,the failure load correlated positively with BMD,and with the BMC of the endplate and the sub-endplate bone.Conclusion The variations in BMD and BMC within a vertebra and around a disc can explain why vertebral fractures are concentrated on the upper endplate,and why compressive fractures are always wedge-shaped.This un- derstanding can assist in the placement of inter-vertebral spacers.

OBJECTIVETo evaluate the effectiveness of locking plate external fixator in treating middle and distal tibial fractures.

METHODSFrom January 2010 to January 2013,18 patients suffered from middle and distal tibial fractures were treated by locking plate external fixator,including 11 males and 7 females, with an average age of 53.5 (ranged from 13 to 80) years old,the course of disease ranged from 2 h to 3 d. According to AO classification, 4 cases were type A,11 cases were type B and 3 were type C. Among them,6 patients were open fracture, including 2 cases with type I, 3 cases with type II and 1 case with type III, according to Gustilo classification), 12 patients were close fracture. Operation time, postoperative complications were observed, and Johner-Wruhs scoring were used to evaluate clinical outcomes.

RESULTSAll patients were followed up from 6 to 15 (meaned 11) months. Two cases occurred skin necrosis (1 case occurred bone exposure), 2 cases occurred delayed union (all were open fracture), and 1 case occurred nail infection. No screw loosening or broken occurred. According to Johner-Wruhs scoring, 10 cases obtained excellent result,6 cases good,and 2 cases fine.

CONCLUSIONLocking plate external fixator for the treatment of middle and distal tibial fractures, which has advantages of lessen damage, shorter operative time, less complications and rapid functional recovery, is one of good choice.

Adolescent ; Adult ; Aged ; Aged, 80 and over ; Bone Plates ; utilization ; External Fixators ; utilization ; Female ; Fracture Fixation ; instrumentation ; methods ; Humans ; Male ; Middle Aged ; Tibial Fractures ; surgery ; Treatment Outcome ; Young Adult

OBJECTIVETo investigate the feasibility and effectiveness of modified Stoppa approach in treatment of bilateral pubic fractures of pelvic.

METHODSThe therapeutic effects of 16 patients with bilateral pubic fractures treated through the modified Stoppa approach from January 2010 to January 2014 were summarized and analyzed, involved 11 males and 5 females with an average age of 40.5 years old ranging from 17 to 59 years. According to Tile classification, there were 8 patients with type A, 6 with type B and 2 with type C. For 16 pelvic fractures, the modified Stoppa approach was used exclusively 11 cases, in combination with the iliac fossa approach in 4 cases, and in combination with the posterior approach in 1 case. The operation incision length, operation time , intra-operative blood loss and postoperative complications were observed. The fracture reduction and post-operative function were assessed by Matta criteria and Majeed system respectively.

RESULTSThe incision length of the modified Stoppa approach ranged from 8 to 10 cm (averaged in 9 cm). The operation time ranged from 75 to 135 minutes (averaged in 95 minutes). The intra-operative blood loss ranged from 400 to 900 ml (averaged in 600 ml). Sixteen patients were followed up from 7 to 18 months (averaged in 12.5 months). The fractures were all healed, the fracture healing time was 2.7 to 5 months (means 3.1 months). There were no infections, ectopic ossification, screw loosening, plate breakage and lateral ventral syndrome. According to Matta criteria for pubic fracture reduction, the result was excellent in 9 cases, good in 6, fair in 1. The Majeed function scores at 6 months after operation was 85.32±8.50; the result was excellent in 8 cases, good in 6 cases, fair in 2 cases.

CONCLUSIONThe modified Stoppa approach has characteristics of convenience and directness of incisions, clear operation field, easy reduction, few complications and fast recovery , it is an ideal choice in surgical treatment of bilateral pubic fractures.

Adolescent ; Adult ; Bone Plates ; Female ; Follow-Up Studies ; Fracture Fixation, Internal ; Fractures, Bone ; surgery ; Humans ; Male ; Middle Aged ; Operative Time ; Orthopedics ; methods ; Pubic Bone ; injuries ; surgery ; Young Adult

OBJECTIVETo identify the affect of chronic low back pain on multifidus muscle atrophy and fatty infiltration.

METHODSFrom March 2010 to August 2013, a retrospective study were carried out in the department of orthopedics of patients with low back pain. Finally 31 cases were selected to this study including 19 males and 12 females with an average age of 36.4 years ranging from 23 to 55 years. The main symptoms of these patients were repeated back pain. Duration was more than 1 year. X-ray, CT, MRI showed no obvious abnormalities. The changes of net cross-sectional area of multifidus and T2 signal ratio of the same patient were measured at different time by MRI. VAS and Oswestry disability scores were recorded in two MRI examination. Correlation between these change of multifidus net area and T2 signal ratio in two times measurement and duration of low back pain, VAS, Oswestry disability scores were analyzed to find the affection of low back pain on paraspinal multifidus muscle.

RESULTSThe net multifidus cross-sectional area in same case by the second follow-up MRI is significantly smaller than that of the first follow-up, T2 signal ratio at second was significantly higher than that of the first (P < 0.05). The net cross sectional area of multifidus muscles reduced rate were positively correlated with VAS scores, duration and of Oswestry disabilitry scores (P < 0.001). The rate of increase in T2 signal ratio was not correlated with VAS scores,duration and the Oswestry disability scores (P > 0.05).

CONCLUSIONChronic low back pain is one of the most important reasons of paraspinal multifidus muscle atrophy and fatty. The duration, VAS and Oswestry disability scores of chronic low back pain were positively correlated with the multifidus muscle atrophy.

Adult ; Chronic Disease ; Female ; Humans ; Low Back Pain ; complications ; Male ; Middle Aged ; Muscular Atrophy ; diagnostic imaging ; etiology ; Paraspinal Muscles ; diagnostic imaging ; Radiography ; Retrospective Studies ; Young Adult