Objective To study the force and pressure transmission through normal wrist,and the effect of transverse carpal ligament release on the biomechanics of carpal tunnel.Methods A 3-D finite element model of the wrist based on CT scan images was established.The load transmission of carpus and the distribution of contact stress on radiocarpal joint under axial compressive force on metacarpals as well as the effect of transverse carpal ligament(TCL)release on the displacement of carpal bones were computed and analyzed.Results The computational results of force and pressure transmission through normal carpus matched well with previous studies.The release of TCL resulted in radial and palmar displacement of the scaphoid,flexion and radial rotation of radiocarpal joint as well as a further radial deviation of the whole carpal tunnel.Conclusion A 3-D finite element model of the wrist that includes the carpal tunnel,distal radius and ulna and proximal metacarpals is developed.This model may simulate the load transmission better and contact stress distribution of carpal tunnel and radiocarpal joint,as well as provide an operational plateform for further deeply studing on biomechanical behavior of carpal structure.The computed and analyzed results of the effect of TCL release on the displacements of carpal bones can be served as related theoratic base on carpal tunnel syndrome,carpal tunnel release surgery and recovery after operation.

Adult ; Agriculture ; Female ; Humans ; Lung ; physiology ; Male ; Middle Aged ; Plastics ; Respiratory Function Tests ; Surveys and Questionnaires

Objective To discuss the effect of self-clotting cutter radiofrequency ablation in curing the hysteromyoma. Methods 96 patients with hysteromyoma were selected. Their hysteromyomas were cured by self-clotting cutter radiofrequency ablation through virgina under the direction of B-ultrasound. Then they were followed up for one month, three months and six months after the operation. Results Six months after the treatment,42.71% of the patients were eumenorrhea,44.79% of the patients' menstrual bleeding volumes were few, 12.5% has no change. The cure rate of anaemia was 100%. 1 month,3 months ,6 months after the treatment, the bulks of uterus and myoma were reduced,and the myoma reduced most after six months. 35.42% of the patients were cured,47.92% had remarkable effect, 15.6% had effect, 1.04% had no effect. Total effective rate was 98.72%. Conclusion The clinical effect of self-clotting cutter radiofrequency ablation in curing the hysteromyoma was satisfactory. It was a minimally invasive technique which could keep the integrality of uterus and it was rapid recovery,effective and safe,and easy to operate.

The effect of gonadotropin-releasing hormone analogue(GnRHa) on lineafity growth and final height in 82 girls with central precocious puberty (CPP) was evaluated. The growth velocity in the second year was positively correlated with the difference value of bone age between the first year and the second year after treatment. The height standard deviation score for bone age and predicted aduh height increased after treatment. Twenty-six girls who had been followed to final height obtained better adult height than target height. GnRHa in combination with aerobic exercise increases linear growth and final height in girls with CPP.

Objective To investigate the effect of sodium fluoride(NaF) on proliferation, differentiation and the mRNA expression of osteoprotegerin (OPG) and receptor activator of nuclear factor κβ ligand (RAN KL) of mouse osteoblasts. Methods Osteoblasts were isolated from calvarias of Kunming mice born in 1 - 2 d and cultured. Various concentrations of NaF(0, 10-8, 10-7, 10-6, 10-5, 10-4, 10-3mol/L) were added to the culture medium, the proliferation and activity of alkaline phosphatase(ALP) was determined after 72 h or 120 h. The expression of OPG mRNA and RANKL mRNA was analyzed by semi-quantification RT-PCR. Difference among groups was analyzed by One-Way AN0VA. Difference between two groups was analyzed by LSD-t test. Results There was significant difference in cell proliferation among groups after 72 h(F = 13.806, P < 0.05). Compared with control group(0.434 ± 0.010) , the proliferation was significantly induced in 10-7 - 10-4 mol/L groups treated osteoblasts (0.448 ± 0.010, 0.453 ± 0.013, 0.454 ± 0.016, 0.449 ± 0.018, all P< 0.05), and was significantly suppressed in 10-3 mol/L group(0.401 ± 0.009, P < 0.05). There was statistic difference in the activity of ALP among groups(F = 9.021, P < 0.05). Compared with control group (1.677 ± 0.682), the activity of ALP significantly increased in 10-7 - 10-5 mol/L groups[ (2.447 ± 0.756) × 106, (2603 ± 0.183) × 106, (2.687 ± 0.886) × 106 U/L, P < 0.05 or P < 0.01 ] and significantly decreased in 10-4 mol/L group[ (1.479 ± 0.366) × 106 U/L, P < 0.05 ]. There was significant difference in the expression of OPG mRNA among groups(F = 11.299, P< 0.05). Compared with control group (1.000 ± 0.000), the expression of OPG mRNA was significantly increased in 10-7 - 10-4 mol/L groups( 1.058 ± 0.027, 1.053 ± 0.026, 1.088 ± 0.055, 1.069 ± 0.008, P < 0.05 or P < 0.01) , while significantly decreased in 10-3 mol/L group (0.941 ± 0.029, P< 0.05). There was no difference in RANKL mRNA expression among groups (F= 1.311, P> 0.05). The ratio of RANKL/OPG decreased with increasing doses of fluoride and increased in 10-4, 10-3 mol/L groups, but there was no difference between groups(F = 1.376, P> 0.05). Conclusions A biphasic pattern of proliferation and differentiation has been induced in mouse osteoblasts, which manifests stimulation effect in low doses and suppression in higher doses. Low doses of sodium fluoride suppress differentiation and maturation of osteoblasts by increasing expression of OPG mRNA, while high doses of sodium fluoride enhance differentiation and maturation of osteoblasts by decreasing expression of OPG mRNA.

Antibodies, Monoclonal, Murine-Derived ; metabolism ; Diagnosis, Differential ; Female ; Follow-Up Studies ; Hemangioendothelioma ; metabolism ; pathology ; surgery ; Hemangioendothelioma, Epithelioid ; metabolism ; pathology ; surgery ; Humans ; Lymphatic Metastasis ; Middle Aged ; Platelet Endothelial Cell Adhesion Molecule-1 ; metabolism ; Sarcoma ; metabolism ; pathology ; surgery ; Thigh ; Vimentin ; metabolism ; von Willebrand Factor ; metabolism

A three-dimensional finite element model of the cell culture membrane was developed in the culture device under tension state made by us. The magnitude of tension and the displacement distribution in the membrane made of silicon rubber under different hydrostatic load were obtained by use of FEM analysis. A comparative study was made between the numerical and the experimental results. These results can serve as guides to the related cellular mechanical research.
Animals ; Biomechanical Phenomena ; Cell Culture Techniques ; Finite Element Analysis ; Imaging, Three-Dimensional ; Membranes, Artificial ; Rats ; Rats, Sprague-Dawley ; Silicone Elastomers

In recent years, the development of molecular biology and medicine has prompted the research of gene therapy for brain diseases. In this review, we summarized the current gene therapy approaches of major brain diseases. Against the pathogenesis of major brain diseases, including brain tumors, Parkinson's disease, Alzheimer's disease and cerebrovascular disorders, there are several effective gene therapy strategies. It is no doubt that, gene therapy, as a novel treatment, is of great significance for understanding the causes, as well as comprehensive treatment for brain diseases.
Alzheimer Disease ; genetics ; therapy ; Brain Neoplasms ; genetics ; therapy ; Cerebrovascular Disorders ; genetics ; therapy ; Genetic Therapy ; methods ; Humans ; Parkinson Disease ; genetics ; therapy

Actins ; metabolism ; Aged ; Breast Neoplasms ; metabolism ; pathology ; surgery ; Carcinoma ; metabolism ; pathology ; surgery ; Diagnosis, Differential ; Fasciitis ; metabolism ; pathology ; Female ; Fibroma ; metabolism ; pathology ; surgery ; Humans ; Keratin-5 ; metabolism ; Mastectomy, Modified Radical ; Neoplasms, Muscle Tissue ; metabolism ; pathology

AIM To study the chemical constituents from Phyllodium pulchellum (L.) Desv..METHODS The ethyl acetate and n-butanol fractions of P.pulchellum 95％ ethanol extract were isolated and purified by Sephadex LH-20,silica,ODS and pre-HPLC column,then the structures of isolated compounds were identified by physicochemical properties and spectral data.RESULTS Eleven compounds were isolated and identified as phydroxybenzoic acid (1),protocatechuic acid (2),protocaechuic acid methyl ester (3),protocatechuic acid ethyl ester (4),ethyl gallate (5),p-coumaric acid (6),caffeic acid ester (7),loliolide (8),uridine (9),arbutin (10),daucosterol (11).CONCLUSION Compounds 4-11 are isolated from genus Phyllodium for the first time,compounds 2 and 3 are first obtained from this plant.