Objective:To analyze the clinical characteristics,neuroelectrophysiological changes and prognosis in children with Acute Flaccid Paralysis(AFP) caused by non-poliovirus(NPV) infections,and to explore it’s possible pathogenesis. Methods: Clinical observation,EV-antibody(EV-Ab) detection in blood serum,creatase detection in blood serum,cerebrospinal fluid(CSF) check-up and electrophysiologic study(EPS) were done in 32 AFP cases by NPV infections;and the result were compared. Results:(1)Children at every age were involved,mostly at age of 1~3 years;it occurred in every season,mostly in summer and autumn;Before palsy,most of them were affected by viral infections in respiratory tract or digestive tract;29 cases had AFP in one side of lower extremity with 3~4 grade muscle force,only 3 cases presented dissymmetrical AFP in both lower extremities,all cases had weakened tendon reflex,and none had sensory disorder.(2)Of 32 cases,10 presented Coxsackie virus antibody(CBV-IgM)(+) and 12 ECHOV-IgM(+) in blood serum,2 presented CBV-IgM(+) and slightly increased protein in CSF,and the rest were normal;2 cases had slightly increased CK in blood serum during climax,and presented normal in convalescent period. (3)Electrophysiologic changes included the following 29 cases had cutdowned compound muscle action potential(CMAP) wave amplitude in motor nerves,especially in the distal amplitude,even disappeared,and had normal nerve conduction velocity(NCV) in motor nerves,the present rate of F-wave was decreased,all cases had normal sensory nerve action potential(SNAP),and normal sensory nerve conduction velocity(SCV),electromyogram of 26 cases indicated neurogenic lesion,and only 3 cases had no obvious changes.(4)Majority of 32 cases recovered in two weeks,and the prognosis was good. Conclusion:The possible mechanism of AFP in children with NPV infections is that the induced immune reaction from NPV infections leaded to the motor nerve’s axonal slight degeneration,especially in its distal amplitude.

BACKGROUND: Much research focuses on the link between β-amyloid peptide and neuron death, but there is little work about white matter alterations in the Alzheimer's disease.OBJECTIVE: To investigate the anterior commissure pathological alteration in the APP/PS1 transgenic mice which model brain amyloidosis of Alzheimer's disease.DESIGN, TIME AND SETTING: A grouping observational study based on the histology was performed in the Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology between September 2007 and September 2008.MATERIALS: Female transgenic APP/PS1 mice [Thy1 APP751 SL (Swedish mutation KM670/671NL, London mutation V7171 introduced in human sequence APP751) × human mutation gene PS1 M146L], control animals were amyloid-deposit free female PS1 mice. A total of 28 mice were divided into young group (2 months, 8 APP/PS1, 7 PS1) and old group (24 months, 6 APP/PS1, 7 PS1).METHODS: The slides of brain tissue were stained with Congo red and antibody against amyloid beta (4G8) to detect brain amyloidosis in Alzheimer's disease transgenic model. Myelin was stained with gold chloride and axon was stained with anti-neurofilament M antibody. The anterior commissure axonal density and myelination were quantitatively analyzed with the relative optical density value of staining with densitometry.MAIN OUTCOME MEASURES: ①The staining of intracellular and extracellular amyloid beta; ②the average area of anterior commissure in the coronal brain tissue sections; ④the relative optical density value of myelin and axon staining in the anterior commissure.RESULTS: A lot of Congo red positive amyloid beta plaques were observed in the cortex, hippocampus, thalamus, and anterior commissure of aged APP/PS1 mice, while intracellular amyloid beta was only present in the cortex of young APP/PS1 mice. A prominent increase in the surface area of the anterior commissure was observed in aged PS1 mice compared with young PS1 mice and aged APP/PS1 mice. The neurofilament staining remarkably decreased, both in aged APP/PS1 and aged PS1 mice; an increase trend of myelination in the anterior commissure was observed both the forementioned groups. Different phenotype analysis demonstrated that axonal density and myelination was comparative in the young APP/PS1 and young PS1 mice; axonal density of aged APP/PS1 mice decreased remarkably compared with aged PS1 control mice, while myelination of aged APP/PS1 mice had no significant difference with aged PS1 mice.CONCLUSION: There exists an axon loss in the anterior commissure in the aged APP/PS1 mice with a complete myelin sheath. The amyloid beta shows a direct toxicity on the axon.

BACKGROUND: It is a researching tendency for tissue engineering to develop compound, bionic, biological-active and intelligent materials, which are characterized by biological activity and can promote proliferation and differentiation of stem cells and tissue regeneration. OBJECTIVE: To summarize the application and development of scaffold materials for nerve tissue engineering. RETRIEVAL STRATEGY: A computer-based online search was conducted in Pubmed and V6.32 database of VIP Information Resource System for English language publications containing the key words of "nerve tissue engineering, tissue engineering, neural, neural stem cells, Schwann cell, biomedical materials, scaffold" from January 2001 to June 2007. There were 123 literatures in total. Inclusion criteria: ① articles about nerve repair with tissue engineering; ② current published literatures in the same field or in authoritative journals. Exclusion criteria: duplicated researches. LITERATURE EVALUATION: Articles are mainly derived from basic researches on scaffold materials for nerve tissue engineering, including resource, physical and chemical properties and compatibility with neural stem cells and Schwann cells. Among 36 involved literatures, there were 6 reviews, statement and lectures, and the other articles are basic researches. DATA SYNTHESIS: ① Up to now, there are no significantly researching breakthroughs about regeneration and repair after nerve injury in clinic. With the discovery of adult neural stem cells and the development of material and cell culture techniques, tissue engineering brings prospect for the treatment of nerve injury. ② Scaffold imitates the structure and function of extracellular matrix (ECM) and plays a key role in replacing extracellular matrix. It is a core for tissue engineering to look for seed cells with strong regeneration capacity and biological materials adapted to cell survival. ③ Researches demonstrate that the resource of scaffold materials for nerve tissue engineering is plentiful. Gelatine, collogen, polylactic acid hybrid materials, chitosan and acellular extracellular matrix are all considered as biocompatibility, security and stable physical and chemical characteristics. Therefore, they have a greatly applied prospect for tissue engineering. ④ There are still many difficulties of scaffold for nerve tissue engineering. It is important significance to optimise tissue construction technique and accelerate clinical application and industrial development of tissue engineering technique via further exploring basic problems, systemically elucidating formation and maturity of tissue engineering and investigating basic scientific problems and internal mechanism during prognosis in vivo. While, tissue engineering will certainly become a hot topic in the future. CONCLUSION: Researches on scaffold for nerve tissue engineering have obtained some achievements, but there are still many difficulties.

BACKGROUND: Much research focuses on the link between ?-amyloid peptide and neuron death, but there is little work about white matter alterations in the Alzheimer’s disease. OBJECTIVE: To investigate the anterior commissure pathological alteration in the APP/PS1 transgenic mice which model brain amyloidosis of Alzheimer’s disease. DESIGN, TIME AND SETTING: A grouping observational study based on the histology was performed in the Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology between September 2007 and September 2008. MATERIALS: Female transgenic APP/PS1 mice [Thy1 APP751 SL (Swedish mutation KM670/671NL, London mutation V717I introduced in human sequence APP751) ? human mutation gene PS1 M146L], control animals were amyloid-deposit free female PS1 mice. A total of 28 mice were divided into young group (2 months, 8 APP/PS1, 7 PS1) and old group (24 months, 6 APP/PS1, 7 PS1). METHODS: The slides of brain tissue were stained with Congo red and antibody against amyloid beta (4G8) to detect brain amyloidosis in Alzheimer’s disease transgenic model. Myelin was stained with gold chloride and axon was stained with anti-neurofilament M antibody. The anterior commissure axonal density and myelination were quantitatively analyzed with the relative optical density value of staining with densitometry. MAIN OUTCOME MEASURES: The staining of intracellular and extracellular amyloid beta; ②the average area of anterior commissure in the coronal brain tissue sections; ③the relative optical density value of myelin and axon staining in the anterior commissure. RESULTS: A lot of Congo red positive amyloid beta plaques were observed in the cortex, hippocampus, thalamus, and anterior commissure of aged APP/PS1 mice, while intracellular amyloid beta was only present in the cortex of young APP/PS1 mice. A prominent increase in the surface area of the anterior commissure was observed in aged PS1 mice compared with young PS1 mice and aged APP/PS1 mice. The neurofilament staining remarkably decreased, both in aged APP/PS1 and aged PS1 mice; an increase trend of myelination in the anterior commissure was observed both the forementioned groups. Different phenotype analysis demonstrated that axonal density and myelination was comparative in the young APP/PS1 and young PS1 mice; axonal density of aged APP/PS1 mice decreased remarkably compared with aged PS1 control mice, while myelination of aged APP/PS1 mice had no significant difference with aged PS1 mice. CONCLUSION: There exists an axon loss in the anterior commissure in the aged APP/PS1 mice with a complete myelin sheath. The amyloid beta shows a direct toxicity on the axon.

Biological scaffolds imitate the structure and function of extracellular matrix,and so good biocompatibility is essential for it.The materials in neural tissue engineering mainly include natural biomaterial and artificial biodegradable materials presently.This article has reviewed the biological function of materials mostly used in neural tissue engineering.

Rcsult of field cultivation test by protoplastic fusion technique for biological cngln ering breeding of Poria cocos in Huoshan county, Anhui Province was reported for the first time. A fusion strain F1 was obtained from parents P1, P6578 by separation, fusion, marker of hypha protoplast and identification of recombinat. It was cultivated simultaneously with P1, P5778 for comparison. Results showed that the average cellal outputs were 1.73, 0.5 and 2.20kg respectively.As the output of strain F1 is intermediate between its parent P1 and P578, the result is considered to be unsatisfactory. The reason for such result was discussed.

Objective To investigate the prevalence of bladder hyperactivity in Huzhou city,Zhejiang prov-ince.Methods 1 872 patients aged over 50 years old male residents were selected as research subjects in Huzhou. To investigate the prevalence of bladder hyperactivity in the elderly male population in the local area.The correlation between age,IPSS score,body mass index,diabetes and the bladder was investigated.Results In 1 872 cases,the data were complete and in accordance with the requirements of this study were 1 863 cases.1 863 cases,505 patients with bladder hyperactivity,bladder disease prevalence was 27.1%.Bladder hyperactivity patients with IPSS score (17.9 ±8.1 )points,prostate volume (36.6 ±18.5 )mL,QOL score (3.6 ±1.1 )points,residual urine volume (26.9 ±3.5 )mL in the bladder,were higher than those with non bladder hyperactivity,IPSS score (3.2 ± 16.8)points,prostate volume (28.1 ±1.3)mL,QOL score (2.3 ±1.8)points,the differences were statistically sig-nificant (t =7.277,5.910,19.814,2.406,P <0.01 -0.05).Qmax(12.6 ±6.3)mL/s in the patients with bladder hyperactivity was significantly lower than Qmax(17.1 ±7.4)mL/s of non bladder hyperactivity,and the difference was statistically significant (t =3.577,P <0.01).With the increasing age of male population,the prevalence of blad-der diseases was increased.With the increase of IPSS score,the incidence rate of bladder excessive activity increased. Diabetes,higher body mass index,the incidence of bladder excessive activity was higher.Conclusion Men with blad-der hyperactivity disorder has higher prevalence in Huzhou city,Zhejiang province.Age,lower urinary tract symptoms, diabetes,obesity are the risk factors in the incidence of bladder disease.

Objective To explore the clinical manifestation of stroke caused by central nervous system vasculitis (CNSV). Methods 49 patients who suffered from stroke by CNSV were reviewed retrospectively. Results Among the 49 patients, 5 were intracerebral hemorrhage, 15 were ventricular hemorrhage, 7 were subarachnoid hemorrhage and 22 were cerebral infarction; the mean of age was (26.0±12.7) years old. Conclusion The clinical manifestation of stroke caused by CNSV is variform, and usually happens in young age. CNSV should be considered as the cause of stroke in adolescent.

Intracerebral hemorrhage is a neurological emergency with high disability and mortality. Studies have demonstrated that thrombin formation,erythrocytolysis and iron ions play important roles in the brain injury after intracerebral hemorrhage. This article reviews the mechanisms of thrombin and iron ions in intracerebral hemorrhage-mediated brain injury.

Objective To investigate the effects of collateral pathways on prognosis of cerebral infarct patients with prior transient ischemic attack (TIA) and its role in neuroprotective mechanism of TIA. Methods A total of 164 cases of the first ever cerebral infarct patients were consecutively allocated into three groups: A , B and C group according to their age.Three groups were divided into two subgroups respectively based on the absence or presence of prior ipsilateral TIA: A1, A2, B1, B2, C1, C2 group. Neurological dysfunctional scores at admission and 1 month after treatment, barthel index, collateral pathways status, and cerebral infarction volume were evaluated respectively. The relationship between development of collateral pathways and prognosis was assessed at the same time. Results The neurological dysfunctional scores and cerebral infarction volume of patients in A1 group and B1 group were significantly lower than those of A2 group and B2 group (P