Objective To establish a fast and accurate technique of identifying the pachytene spermatocytes,round spermatids and elongating and condensing spermatids during STA-PUT velocity sedimentation.Methods Using STA-PUT velocity sedimentation method to isolate the pachytene spermatocytes, round spermatids and elongating and condensing spermatids from mouse testes.To determine the cell populations` distribution,each tube of cell fraction was then partially transfered to the 96 plate well,and each well was added with acridine orange dye.Then each well was analyzed using fluorescence microscopy.Results Three types of spermatogenic cells can be identified quickly and accurately by it`s specific cytoplasm/nucleus character using the acridine orange dye staining under fluorescence detection.Conclusions A rubust method to quickly and accurately determine the pachytene spermatocytes,round spermatids and elongating and condensing spermatids during STA-PUT velocity sedimentation is successfully developed.

Objective To explore the clinical features of very long chain acyl-CoA dehydrogenase deifciency (VLCADD). Methods The clinical manifestation and the biochemical data of one baby girl with VLCADD were summarized and related literatures were reviewed. Results Female patient, aged 7 months, presented with recurrent vomit, haematemesis, stare, nodal tachycardia, hypoglycemia, abnormal liver function and myocardial enzyme. She died after one month due to frequent relapse together with withdrawing treatment. Conclusion VLCADD as a rare disease that cause sudden unexpected death in infant, the early diagnosis and treatment are important to patients.

AIM: To set the model of rat bone marrow me se nchymal stem cells (BMMSCs) that differentiate into cardiomyocytes and observe t he connection structure between cells. METHODS: BMMSCs were isolated by adhering to culture plates and cultured in vitro to expand. Induction of BMMSCs to differentiate into cardi omyo cytes was conducted by treating the cells with 5-aza. Immunocytochemical stainin g was used to identify sarcomeric actin and intercalated disc-like structure wh en the cells were cultured for additional 1 week, 2 or 3 weeks, respectively. RESULTS: Sarcomeric actin positive cells were observed in 1 week , 2 or 3 weeks after 5-aza treatment. Some cells stained positive for connexin4 3 at 1 week and 2 weeks after 5-aza treatment, with brown pellet located disper sively around nucleus. 3 weeks after 5-aza treatment, connexin43 positive cells s howed brown pellet arranging in thready structure around nucleus, such structure could be seen between very few cells which was similar to intercalated disc-lik e structure in normal heart tissue. CONCLUSION: During the process of BMMSCs differentiating into ca rdiomyocytes, intercalated disc-like structure is gradually formed with increas e in culture time and cell density.

OBJECTIVE:To study the compatibility of gatifloxacin for injection with famotidine for injection in 0.9% sodium chloride injection or 5% glucose injection.METHODS:At room temperature ((20?1)℃)for 8 hours,the changes of the mixture in appearance,pH and UV spectra were observed,and the contents of gatifloxacin and famotidine were determined by ultraviolet spectrophotometry.RESULTS:No significant change was found in pH values and contents within 8h after mixing of the two drugs,nor significant changes were found for the mixture in appearance within 8h in 0.9% sodium chloride injection or within 6h in 5% glucose injection.CONCLUSION: The mixture of gatifloxacin for injection and famotidine for injection were stable in 0.9% sodium chloride injection or 5% glucose injection.

OBJECTIVE:To study the compatibility of gatifloxacin for injection with etamsylate injection in 0.9% sodium chloride injection and 5% glucose injection.METHODS:The appearance of the mixture of gatifloxacin for injection with etams-ylate injection in 0.9% sodium chloride injection and 5% glucose injection at room temperature,i.e.(20?1)℃ within 8 hours was observed,with its pH measured and ultraviolet spectra observed.The contents of gatifloxacin and etamsylate were determined by a dual ultraviolet spectrophotometry.RESULTS:No significant change was noted for the mixture within 8 h in pH and appearance,and the contents of gatifloxacin and etamsylate within 8 h in 0.9% sodium chloride injection or within 6 h in 5% glucose injection showed no obvious change.CONCLUSION:Gatifloxacin for injection can be mixed with etamsylate injection in 0.9% sodium chloride injection or 5% glucose injection.

AIM: To investigate the protecting mechanisms of adjusting blood pressure and blood fat capsule(Radix angelicae sinesis,Rhizoma alismatis,poria,Rhizoma attactylodis macrocephalae,Rhizoma Chuanxiong,Radix Paeoniae alba,semen arecae,Folium perillae) in diabetic nephropathy rats induced by streptozotocin. METHODS: Forty-eight health male Wister rats were randomly divided into normal group,diabetic nephropathy group,adjusting blood pressure and blood fat capsule group and valstatan group.After experiment urine,blood,kidney samples were taken,and immunohistochemistry were performed. RESULTS: 24 hour urinary microalbumin,creatinine clearance,?_2-microglobulin,creatinine clearance ET1 and NOS in kidneys had distinct difference among three gruops. CONCLUSION: The provention and cure of DN ' function of adjusting blood pressure and blood fat capsule bears relationship with inhibition of ET-1,NOS's expression.

AIM:To investigate the effect of exogenous epidermal growth factor(EGF) on expression of EGFR and EGF mRNA of the injuried lung tissue of neonatal premature rats exposed to hyperoxia.METHODS:The neonatal Sprague-Dawley rats of 21-day gestational age model of hyperoxia induced lung injury were made by continually inhaling 95% oxygen.The model rats were divided into two groups randomly,the EGF trail group and the NS control group.The other rats were taken into the air control group.Each group was divided into three subsets:a(1-3 days),b(4-6 days) and c(1-6 days) according to different application times of EGF or NS.Rats in sub groups were executed and the lung tissues were removed at postnatal 3th,7th,14th day respectively.Using immunohistochemistry method,the expression of EGF-R of lung tissues in different groups was observed,and the expression of EGF mRNA was determined by reverse transcriptase polymerase chain reaction(RT-PCR).RESULTS:The expression of EGF mRNA increased by degrees following the increasing postnatal days.Compared with the air control group,the expression of EGF-R and EGF mRNA increased in the hyperxia group at 7th day and 14th day.The expression of EGF-R increased in corresponding hyperxia NS control group at 14th day(P

Objective To summarize adverse reactions of common traditional Chinese medicine injection for the treatment of cardiovascular and cerebrovascular diseases,and put forward the countermeasures.Methods Adverse reactions of common traditional Chinese medicine injection for the treatment of cardiovascular and cerebrovascular diseases were arranged,and the reasons were analyzed.Results Adverse reactions were mainly skin and cardiovascular system diseases and so on,and were related with the quality of medicinal material,preparation process,and so on.Conclusion We should strengthen every link of production,from the medicinal plant to clinical use,improve the quality of traditional Chinese medicine injection,and strengthen the supervision to reduce the incidence of adverse reactions and ensure drug safety.

Objective To assess the imaging characteristics of 18F-Alfalide II in different tumorbearing mice and pharmacokinetics in Beagle dogs.Methods BALB/c nude mice(n-24)were used for subcutaneous tumor models(A549 and U87MG),orthotopic lung cancer models(A549)and orthotopic breast cancer models(MDA-MB-231)(n=6 in each group).18F-Alfatide II and 18F-fluorodeoxyglucose(FDG)microPET/CT images were compared in the 4 types of tumor-bearing nude mice models.18F-Alfatide II blocking experiment,biodistribution experiment and imaging studies in tumors of different growth cycles were performed in A549 subcutaneous tumor-bearing nude mice models.Pharmacokinetic experiments were carried out in Beagle dogs(n = 6)and CD-1 mice(n = 9).Two-sample t test was used to analyze the data.Results Compared with 18F-FDG,18F-Alfatide II microPET/CT images showed better imaging quality and contrast in subcutaneous A549,U87MG tumors and orthotopic A549(tumor/heart:4.50±1.17 vs 0.95±0.31;t = 4.125,P<0.01),orthotopic MDA-MB-231(tumor/muscle:6.60±1.53 vs 0.92±0.43;t = 3.984,P<0.01)transplantation nude mice models.18F-Alfatide II could specifically target A549 tumors,and the tumor uptake of 18F-Alfatide II was reduced by about 75% after pre-injection with cyclo(Arg-Gly-Asp-D-Tyr-Lys)(c(RGDyk)).18F-Alfatide II was rapidly cleared from the blood of Beagle dogs(T1/2 was(57.34±11.69)min).It was cleared in the form of prototype drug and(69.24±6.82)% of cumulative dose was excreted through the urine within 4 h after administration.Conclusions 18F-Alfatide II shows a higher target/non-target ratio than,18F-FDG in the imaging of A549,MDA-MB-231 and U87MG tumor-bearing nude mice models,which is more conducive to the diagnosis of tumor.18F-Alfatide II has excellent pharmacokinetic properties.

Based on the biomechanical simulation curve of OpenSim, an open source software of biomechanical model, a spherical exoskeleton parallel mechanism with two degrees of freedom for hip joint is proposed in this paper for the rehabilitation therapy of patients with impaired leg motor function or elderly people with walking dysfunction. Firstly, the parallel mechanism is modeled and the position inverse solution of the parallel mechanism is obtained using inverse kinematics analysis. The velocity analysis expression of the mechanism is derived by deriving the inverse kinematics solution. The model is imported into the mechanical system dynamics analysis software ADAMS and matrix processing analysis software MATLAB to carry out simulation experiments. The correctness of the velocity analysis is verified by comparing the velocity simulation results of the two methods. Then, three singular types of the mechanism are analyzed according to the obtained Jacobian matrix. According to the inverse solution of the mechanism, the reachable workspace of the mechanism is obtained by programming in MATLAB with given mechanism parameters and restriction conditions. Finally, the prototype platform is built. The experimental results show that the exoskeleton hip joint using this parallel mechanism can satisfy the requirement of rotation angle of human hip joint movement, but also can be good to assist patients with leg flexion-extension movement and adduction-abduction movement, and it is helpful to carry out corresponding rehabilitation training. It also has theoretical significance and application value for the research work of human hip exoskeleton parallel mechanism.
Biomechanical Phenomena ; Exoskeleton Device ; Hip Joint ; physiology ; Humans ; Models, Theoretical ; Movement ; Rehabilitation ; instrumentation ; Rotation ; Walking