OBJECTIVE:To optimize water extraction technology of Shenqi yiqi capsules. METHODS:The water extraction technology of Shenqi yiqi capsules was optimized by L9(34)orthogonal test with amount of water added,decoction times and decoc-tion time as factors using the extraction rate of astragaloside,calyosin-7-O-β-D-glycoside,icariin and bergenin as index,and the verification test was made. RESULTS:The best extraction technology was as follows as 8-fold water,decocting for 3 times,2 h each time;comprehensive score of 3 batches of samples in validation test were 98.95,99.71 and 99.98(RSD<2%,n=3). CON-CLUSIONS:The water extraction technology optimized by multi-index comprehensive score-orthogonal test is stable,scientific and reasonable.

Objective To measure stress distribution of the main bone architecture of the normal adult cadaveric foot and discuss the effect of plantar ligament injury on stress distribution. Methods Seven fresh adult cadaveric feet were used and 10 strain gauges attached to the bones of the longitudinal foot arch,including the calcaneus,navicular,medial cuneiform,1-5 metatarsal trunk,the distal part of the tibia and fibular,respectively.After the loading Was added to 700 N by almighty test machine,resistance strainmeter was used to measure surface strain of these bones.The results were processed statistically. Results The strain was varied based on different bone segments attached and increased with loading.Tensile force was always found at the medial part of the navicular,the distal part of the tibia and fibular,while the others showed compression all the time.Peak strain was found at calcaneus.followed by the second and third metatarsal.Strain on the surface of the bone segments changed greatly with different ligament injury(P＜0.05).Conclusion The bone surface stress of the longitudinal foot arch changes significantly when the plantar ligament is injured.

Aim To study the vasodilation of MS23,a brand new phosphodiesteras inhibitor,on contractions induced by various stimuli in rings of arteries isolated from rat different organs.Method Tension of aortic and microvessel rings were recorded isometrically by PowerLab and DMT system respectively.Results MS23 concentration-dependently shifted the noradrenaline(NA)-induced concentration-contraction curves rightward in a non-parallel manner with the maximal contraction depressed by 74.7%.MS23 and aminophylline(Ami) produced concentration-dependent relaxation on KCl or NA-induced precontraction.Endothelium deprivation and NO synthesis inhibition induced by L-NAME failed to affect the relaxation.MS23 and Ami relaxed KCl-induced precontraction of rat coronary,middle cerebral,renal and mesenteric arterial rings in a concentration-dependent manner,and showed no organ preference in this respect.Conclusion MS23 antagonizes and relaxes contractions induced by various stimuli in the rings of arteries isolated from different organs of rat without marked preference among the organ origin of artery and stimuli.The vasorelaxation induced by MS23 is related neither to endothelium nor to nitric oxide synthesis.

Objective: To observe the expression of proteins Rb and P 53 in leukoplakia (LK) and squamous cell carcinoma (SCC) of oral muco sa. Methods: The expression of proteins Rb and P 53 was determined by immunohistochemical S-P method. Paraffin sections of 33 s amples of SCC and 20 of LK were immunohistochemically stained and analyzed. Results: (1)The expression of Rb in OLK, OSCC was not si gnificantly different from that in normal oral mucosa ;(2)the overexpression of mutant P 53 were found in OLK and its expression was increasing with dysp hasia degree (P

To provide a digital simulation platform for foot-ankle biomechanics research, a 3-D finite element model was established through helical CT images under the principle of RE (reverse engineering) and meshed in FEM software. In the process of modeling cartilage, ligaments, tendons and plantar soft tissue, many anatomic data and results of cadaver specimen experiment were referenced; LINE elements and SHELL elements were used skillfully to simplify the model and resemble the physiological state. The model was then validated by specimen experimentation, which was done on seven fresh cadaver foot specimens, and digital speckle correlation method (DSCM) was used to measure their displacements. Upon the comparison with experimentation and others models, this study also testified that the model, of which the plantar fascia is linked to the heads of metatarsus, is more reasonable to clinical application.
Adult ; Biomechanical Phenomena ; Finite Element Analysis ; Foot ; diagnostic imaging ; Humans ; Imaging, Three-Dimensional ; Male ; Models, Anatomic ; Tomography, Spiral Computed

In active health, biomechanics plays an irreplaceable role. Exercise creates mechanical stimulation to human tissues and organs. It promotes health, or causes injury and disease. In addition, biomechanics is involved in the design and evaluation of assistive devices, as well as in rehabilitation clinical diagnosis and treatment. The development of active health biomechanics requires the integration of sports and medicine. It includes more dynamics, fatigue and mechanical coupling issues. In the future research, on the one hand, the experience of other directions in biomechanics should be learnt from. On the other hand, it is necessary to combine the frontiers of scientific and technological development to develop new directions in biomechanics.

Objective To discuss the clinical efficacy of surgical treatment of pathologic vertebral surgery for thoracic and lumbar tuberculosis. Methods All of 322 cases of thoracic and lumbar spinal tuberculosis patients from December 2003 to June 2014 were retrospectively analyzed in our department. All patients were underwent debridement, fusion and nerve decompres?sion surgery. According to different fixed methods, patients were divided into pathologic vertebral surgery group (fixation complet?ed within lesions invaded motion unit) including 91 males and 100 females, with an average age of 41.53 years, and non?pathologic vertebral surgery group (long segments or short segment fixation) including 61 males and 70 females, with an average age of 42.72 years. We observed the tuberculosis cure rate, degrees of deformity, pain and neurological recovery, operative time, blood loss and complications by follow?up. Results The average follow?up time was 75.52 months in pathologic vertebral surgery group and 76.21 months in non?pathologic vertebral surgery group. The total number of pathologic vertebras in pathologic vertebral surgery group and non?pathologic vertebral surgery group were 277 and 218 respectively, and the average was 1.45 and 1.66. The total number of fixed segments was 277 in pathologic vertebral surgery group and 485 in non?pathologic vertebral surgery group, and the average fixed segments was 1.45 and 3.70. The cure rate was 85.86%in pathologic vertebral surgery group and 85.49%in non?pathologic vertebral surgery group at 6 months postoperatively, and 98.95%and 98.47%at the last follow?up time, with no signifi?cant difference between groups. Graft fusion rate was 89.00%in pathologic vertebral surgery group and 89.31%in non?pathologic vertebral surgery group 6 months postoperatively, 98.38%and 98.47%at the last follow?up time, without significant difference. In lumbar spine, the average correction of Cobb's angle was 12.4° in pathologic vertebral surgery group and 13.1° in non?pathologic vertebral surgery group, and the average angle loss was 1.3 and 1.4°, with no significant difference. In thoracolumbar, the average correction of Cobb’s angle was 10.9°in pathologic vertebral surgery group and 11.1°in non?pathologic vertebral surgery group, and the average angle loss was 1.7°and 1.5° respectively, without significant difference. However, in thoracic, the average correction of Cobb's angle was 10.2° in pathologic vertebral surgery group and 12.7° in non?pathologic vertebral surgery group, and the average angle loss was 3.6° and 2.5°respectively, with significant difference. The mean operation time was 210.45 min in pathologic verte?bral surgery group and 210.45 min in non?pathologic vertebral surgery group, with significant difference. The average blood loss was 726.12 ml in pathologic vertebral surgery group and 726.12 ml in non?pathologic vertebral surgery group, with significant dif?ference. The complication rate was 11.51%in pathologic vertebral surgery group and 11.45%in non?pathologic vertebral surgery group, with no significant difference. Conclusion Pathologic vertebral surgery surgery is a safe, effective and feasible method of operation for treatment of thoracic and lumbar tuberculosis, which can effectively preserve adjacent normal vertebral motion unit features. The thoracic surgery was less satisfactory than the lumbar and thoracolumbar surgery.

Objective To study the in vitro cytotoxicity of HRZ (isoniazid + rifampin + pyrazinamide) / transforming growth factor (TGF) β1 siRNA nanoliposomes on human macrophages and the underlying mechanism. Methods Self-made nanoliposomes were used to study with the cultured human macrophages in vitro. MTT assay was used to detect cell proliferation. Flow cytometry was used to analyze apoptosis and cell cycle. Electron microscopy was used to observe autophagy. RT-PCR and Western blot were employed to analyze the silenced expression of target gene TGF-β1. Results HRZ/TGF-β1 siRNA nanoliposomes (triple liposome) inhibited macrophage proliferation within certain range of concentration, and cell cycle was captured in G2 phase. The HRZ / TGF-β1 SiRNA nanoliposomes could significantly inhibit the expression of target gene TGF-β1 in human macrophages. Conclusions The self-made triple liposome has evident effect in silencing the target gene. It is a promising biomaterial, which meets the required specifications in terms of cytotoxicity.

Tai Chi, developed from a kind of martial arts into a new form of exercise therapy, has received wide attention. Studies on the rehabilitation effects of Tai Chi and its mechanism have been conducted by researches in both China and other countries, and most of these studies are concerned with Tai Chi’s role in balance improvement. According to the purpose of the study and the evaluation index, the rehabilitation function and biomechanical characteristics of Tai Chi exercising were reviewed. The biomechanical mechanism of rehabilitation function was discussed by comparing the differences between the research method and the conclusion. Due to the lack of a unified specification for the standard and duration of Tai Chi exercising, some study result are inconsistent. Enhancing biomechanical researches on Tai Chi and setting different practicing standards for people with various health conditions will be a main direction for Tai Chi study in the future.

Objective To analyze the biomechanical effects of gravity loading countermeasure garment on human lumbar intervertebral disc in microgravity environment. Methods Based on CT images of a healthy adult volunteer, the finite element model of L4-5 vertebrae was established. Through the empty load and 400 N axial loading for 4 hours on lumbar finite element model, the biomechanical effect of the non-intervention and gravity loading countermeasure garment were simulated respectively in microgravity environment. Results The central pore pressure, radial displacement and water content of the human lumbar intervertebral disc increased with time in microgravity environment. In the case of wearing gravity loading countermeasure garment, the central pore pressure, axial stress, radial displacement and water content of the lumbar intervertebral disc were reduced after 72 hours of cyclic loading compared with the non-intervention group. Conclusions Wearing gravity loading countermeasure garment can help astronauts to prevent the adverse effects of microgravity on the spine to some extent in microgravity environment.