Objective To investigate the neuroprotection of different brain regions after transplantation of genetically modified myoblasts producing brain derived neurotrophic factor (BDNF) into cortices of neonatal rats subjected to hypoxic ischemic encephalopathy (HIE). Methods Seven day old pups were randomized into sham operated group (C), HIE+BDNF group (B) and HIE+mock transplantation group (A). A rat myoblast cell line expressing and secreting BDNF (BDNF(+)/L 6TG) was constructed. A stereotaxical intracerebroparenchymal transplantation of either BDNF(+)/L 6TG (B) or BDNF(-)/L 6TG (absence of BDNF, A) at 0.8 ?l of cell suspension (4?10 4/?l) into the left cortex of the brain was carried out shortly after HIE undergone by ligation of left common carotid artery followed by a 2.5 h inhalation of humidified 8% O 2+92% N 2 at 37℃. Changes of areas of different brain regions of cortex, hippocampus and striatum at different sections were observed 21 d after the procedure. Injury severity scores of brain tissues were also performed. Results Twenty one days after the manipulation, various degrees of atrophy were observed in the three regions of left hemispheres in group A or B versus contralateral corresponding regions or group C whereas this atrophy in group B was significantly reduced when compared to group A. Not only was the atrophy of cortex near the grafting point alleviated but some other regions of left hemispheres. A similar change pattern was seen in injury severity scores of the tissue. Conclusion Present data suggest that intracerebral transplantation of genetically modified myoblasts producing BDNF has a beneficial effect on the protection from damage of both circumscriptus brain tissues and some other areas distanced from the grafted place.

Objective To optimize the preparation of high-efficiency galactocylated poly-L-lysine (Gal-PLL) ligand of the asialoglycoprotein receptor in liver, providing premise and foundation for upper preparation of ultrasound contrast agent of liver targeted nanoscale perfluorocarbon microballoon and the liver targeted molecular imaging. Methods Chemical reactions of reductive amination were carried out on group A and group B according to different proportions of reaction component. Each group was subdivided into three subgroups. In group A, three different molar ratios of D-galactose and poly-L-lysine (PLL) were compounded respectively with equivalent and sufficient reductant borohydride. In group B, identical molar ratios of D-galactose and PLL were compounded respectively with three unequal reductants borohydride. Products of each group were separated and purified by sephadex column to acquire different molecular weight distributions and the results were analyzed. Results In the condition of identical reductant, the peak curve of compound's molecular weight appeared earlier when D-galactose decreased properly. In the condition of identical molar ratio of D-galactose and PLL,the peak curve of compound's molecular weight appeared also earlier when reductant decreased properly. When the molar ratio of D-galactose and reductant was 1∶1, the peak curve of compound Gal-PLL and free components was more obvious, and the quantity of compound Gal-PLL increased to maximum. Conclusions In the condition of identical reductant, coupling effect of D-galactose and PLL increased when D-galactose decreased properly. In the condition of identical molar ratio of D-galactose and PLL, coupling effect was better when reductant decreased properly. When the molar ratio of D-galactose and reductant was 1∶1, coupling effect of them was the best. The coupling of D-galactose and PLL was related to not only the proportion of D-galactose and PLL, but also the proportion of D-galactose and reductant.

Adolescent ; Ethmoid Sinus ; Humans ; Male ; Osteoma ; complications ; Skull Neoplasms ; complications ; Vision, Low ; etiology

Anemia, Aplastic ; diagnosis ; etiology ; Benzene ; poisoning ; Expert Testimony ; Humans ; Male ; Occupational Diseases ; diagnosis

Consensus Development Conferences as Topic ; Endoscopy ; Europe ; Humans ; Nose Neoplasms ; diagnosis ; surgery ; Skull Base Neoplasms ; diagnosis ; surgery

The teaching of sensory integration theory to therapists(trainees and in-service staff)is an effective way to enrich their theoretical knowledge and enhance their skills in pediatric rehabilitation.This article summarized the experience of our teaching methods in experimenting Dr.Jean Ayers'sensory integration theory from the design,preparation and implementation of teaching.

Aim To investigate the influence of iridosides of cornus officinalis(ICO) on morphology, cell cycle and oxidative stress of glomerular mesangial cells(GMC) cultured with advanced glycation end products(AGEs). Methods GMC were incubated in culture medium containing AGEs in the presence of ICO and aminoguanidin for 48 hours. At the same time, the control and model groups were added. Then the cultured GMC were stained by mixed fluorescence liquid and observed under fluorescence microscope. Cell cycle of GMC were analyzed using flowcytometry. The content of MDA, activity of SOD and GSH-Px in GMC supernatant were measured. The level of ROS was detected using flowcytometry. Result Morphology analysis showed that the morphology and structure of normal GMC were normal. The structure of most cells in AGEs were unclear, cell counts increased largely and they grow intensively. Cell cycle analysis showed that cell percentage of S phase increased and G_0/G_1 reduced. The level of ROS, MDA remarkably increased, and SOD, GSH-Px activity reduced. When the ICO were added, cell morphology tended to be basically normal and cell counts decreased, the percentale of S phase also decreased. The level of ROS, MDA and the SOD, GSH-Px activity restored in comparison with the model groups. Conclusion ICO can prevent the cultured GMC from lesion caused by AGEs. ICO may protect GMC from AGES to retard the progression of diabetic nepropathy by partially inhibiting the occurrence of oxidative stress.

Objective To evaluate the safety of dynamic anterior plate fixation for cervical distractive flexion injuries and compare its rigidity between different types of plate design. Methods Twelve sets of cadaveric calf spine were used in this test. All the specimens were made into distractive flexion injury models (C4-C5) ac- cording to Allen's method. After discectomy and grafting, they were randomized into three groups in which Orion, Codman, and Window instrumentations were used respectively. The stiffness of each construct was tested in flexion, extension, lateral bending and axial torsion conditions sequentially. Results Compared with an intact cervical spine, the range of motion (ROM) of an injured cervical spine increased whatever plate was applied. Orion in- strumentation presented stiffness the closest to that of the normal control, except for less torsional stiffness. Codman instrumentation provided stiffness close to that for normal and Orion groups only in lateral bending. Window's was the weakest mad not enough in all kinds of movement. Conclusions Static anterior fixation is the first choice for cervical injuries. Dynamic plate fixation may sacrifice stiffness to some extent, especially when a shifting kind of design is to be chosen.

Objective To retrospectively investigate and compare the clinical features in type 2 diabetic patients with various lesions of diabetic nephropathy.Methods One hundred and fifty patients of type 2 diabetes mellitus were registered from December 1990 to April 2004,among them 73 cases of diffuse glomerulosclerosis (DIF)and 77 nodular glomerulosclerosis(NOD)were all proven by renal biopsy.Data such as the durations of diabetes mellitus and hypertension,body mass index(BMI),diabetic retinopathy,HbA_1c,plasma albumin, proteinuria,urine N-acetyl-?,-glucosaminidase,urine osmolarity,ereatinine clearance rate(Ccr)were collected and compared.Results(1)Compared with the patients with DIF,the patients with NOD had longer duration of diabetes mellitus[(122.0?8.1 vs 56.0?7.8)months,P

·AIM: To analyze the clinical manifestation of Alport syndrome, especially the ocular features.·METHODS: The physical, ophthalmologic and audiologic examination results of thirty two patients with Alport syndrome were analyzed retrospectively.·RESULTS: Thirty (93.7%) patients had some family history. All patients had renal disease: eighteen(56.3%) patients with chronic renal failure, four(12.5%) patients with renal insufficiency, and the other ten(31.3%) patients with hematuria. Twenty (62.5%) patients had sensorineural deafness. Thirteen (40.6%) patients had ocular deformity, five(15.6%) patients had typical ocular changes: three patients with anterior lenticonus, and two patients with macular flecks.·CONCLUSION: Ocular anomalies are not requisite for the diagnosis of Alport syndrome. But its typical ocular features should be recognized by the ophthalmologists which supports the diagnosis.