ObjectiveTo observe Semaphorins-3A and synaptophysin P38 expression in hippocampus of developing rat induced by status epilepticus.Methods 320 SD rats were divided into four groups (P7,P14,P21 and P28) according to day -old after birth (7d,14d,21d and 28d).Rats in each group were randomly divided into model group (SE group) and saline control group (NS group).SE was induced by Pentylenetetrazol (PTZ).Semaphorins-3A and synaptophysin P38 expression were determined by immunohistochemical staining on 1d,7d,14d,21d and 28d after SE in hippocampal CA1 of rats.ResultsSemaphorins-3A-positive cells could be seen in the hippocampal granule cell layer in all rats.Semaphorins-3A expression tended to decrease with the increasing of day-age,especially in P7 group(91 552.68 ± 4664.69 ).No matter how day-age,Semaphorins-3A expression was similar to that in NS group and was obvious reduced in 7d after SE(56 938.84 ± 5688.47 ).Meanwhile P38 expression in P7-day-age rats had had been gradually increasing between 1 day and 14d (5413.18 ±48.77,6223.40±29.19,6902.94 ±78.51 ) and then stabilized gradually on 21d(7523.42 ± 62.94) after rats were tested.P38 expression in other day-age rat was relatively stable on the same level in physiological state.On the other hand P38 expression in the hippocampal CA1 region of P7,P14,P21 and P28 rats was significantly higher than that in normal rats between 1day and 28day after SE episode(P＜ 0.05 ),and reached a peak on 14 day(8408.35 ± 55.73 ).ConclusionSemaphorins-3A and synaptophysin P38 involved in hippocampal synaptic plasticity of rat in developing stage and epilepsy.

Objective To observe neural stem cells proliferation,migration and differentiation in hippocampus in developing rats with status epileptictus.Methods 320 healthy SD rats at age 7,14,21,28 d (P7,P14,P21,P28) were randomly divided into status epilepticus (SE) and normal control group.In each group those rats at the same age were further randomly divided into 1,7,14,21,28 d five time points after PTZ-induced SE (n =8).New cell proliferation and migration were observed by immunohistochemistry studies in the dentate gyms.Double labeling with Brdu/NeuN and Brdu/GFAP was performed in the P14 rats.Results Nestin positive cells appeared in the dentate gyms on 1 d after SE in P7,P14,P21,P28 rats.The number of nestin positive cells gradually increased on 7 d and reached a peak on 14 d,then gradually reduced on 21 d,finally fell to a minimum on 28 d after SE.The numbers of nestin positive cells on 7 d(177.00 ± 3.22,t =16.033) and 14 d (195.00 ± 3.41,t =28.840) were significantly higher in the SE group than the NS group (147.50 ± 2.08,136.50 ± 2.65,both P ＜ 0.05).The smaller age of rats with SE onset,the greater the nestin intensity.But the number of nestin positive cells in the dentate gyrus of normal rats were gradually decreased with increasing age.Nestin positive cells were distributed in subgranular zone of dentate gyrus on 1 d and 7 d after SE,then gradually migrated to the granule cell layer on 14 d with morphological changes.Small part of nestin positive cells were ectopically migrated to the hilus of dentate gyrus in P14,P21,P28 age rats,and were also seen in the CA1,CA3 of hippocampus and cortex with various cell morphology.For differentiation of newly generated cells,most of Brdu positive cells coexpressed NeuN and about 4％-5％ cells co-expressed GFAP.Conclusions SE could induce neurogenesis in the hippocampal dentate gyrus area in developing rats which has age-related characteristics.Most new cells migrate from the subgranular zone to the granule cell layer of the dentate gyrus,and a small number of newly generated cells ectopically migrated to the hilus of dentate.The majority of newly generated cells differentiate into neurons,and the others differentiate into glial.

Objective To study the distribution and expression of Semaphorins-3A protein in brain of postnatal rats.Methods Semaphorins-3A positive cells were observed by immunohistochemistry in the cerebral cortex,hippocampus,dentate gyms and entorhinal cortex in postnatal 0d,7d,14d,21 d and 28d of Sprague Dawley rats.Results Semaphorins-3A positive cells widely distributed in the granule cell layer ( Ⅱ ),external pyramidal cell layer ( Ⅲ ),internal granular cell layer ( Ⅳ ),pyramidal cell layer ( Ⅴ ) and layer of polymorphous cells ( Ⅵ ),in addition to the molecular layer ( Ⅰ ) of the parietal,occipital,frontal,temporal,insular,cingulate cortex,piriform cortex and entorhinal cortex with postnatal 0d,7d,14d,21d and 28d rats.The amount of semaphorins-3A positive cells(IOD) in the entorhinal cortex was 84916.23 ± 3266.34 in P0d,77711.41 ± 2634.26 in P7d,74124.25 ± 3989.09 in P14d,65887.63 ± 3406.57 in P21d and 57705.96 ± 3136.35 in P28d,meanwhile the region of semaphorins-3A positive cells narrowed in the part level with Ⅱ -Ⅵ levels of cortex.Similarly semaphorins-3A positive cells distributed mainly in granule cell layer of dentate gyrus,CA1,CA3 region and only a few of semaphorins-3A positive cells scattered in the multi-line layer in hippocampus.The expression level of semaphorins-3Awas significant difference among postnatal 0d,7d,14d,21d and 28d rats (P＜0.01).Conclusion Semaphorins-3A positive cells widely distribute in the various cortex and hippocampus in developing rat brain,and the region of semaphorins-3A is reduced with age growth of rats.

OBJECTIVEThe purpose of this study is to comprehensively explore the risk factors of primary open angle glaucoma (POAG) in China.

METHODSTwo groups of data based on distinct resources were analyzed to explore the risk factors of POAG. One group of data was based on hospital records between 1995 and 2000 which composed of 107 patients with POAG and 149 controls without POAG. The other group of data was based on 40 patients with POAG and 120 matched controls without POAG. The former was designed by non-matched case control study, the latter was done by 1:3 matched case control study. The relationships between POAG and the factors such as age, sex, family history, diabetes, hypertension, intraocular pressure (IOP), cardiovascular diseases, smoking, drinking and mutation of TIGR gene were studied by logistic regression analysis.

RESULTSThe simple factor analysis showed that the risk of POAG was related to age, family history, hypertension, IOP, cardiovascular diseases, smoking, drinking and the mutation of TIGR gene (T353I). However, logistic regression analysis confirmed that POAG mainly related to IOP, family history, hypertension, smoking, alcohol intake and the mutation of TIGR gene.

CONCLUSIONThe most important risk factor of POAG was IOP. Family history, hypertension, smoking and the mutation of TIGR gene were also important risk factors of POAG. However, alcohol intake was a protective factor for POAG.

Adolescent ; Adult ; Age Factors ; Aged ; Alcohol Drinking ; adverse effects ; Case-Control Studies ; China ; epidemiology ; Cytoskeletal Proteins ; Eye Proteins ; genetics ; Female ; Glaucoma, Open-Angle ; epidemiology ; genetics ; Glycoproteins ; genetics ; Humans ; Male ; Middle Aged ; Risk Factors ; Smoking ; adverse effects

Cardiac Catheterization ; Ductus Arteriosus, Patent ; therapy ; Heart Septal Defects, Atrial ; therapy ; Humans ; Printing, Three-Dimensional ; Vena Cava, Inferior

With intensified aging， Alzheimer's disease has become a serious problem in China's health field. In the field of traditional Chinese medicine （TCM）， Alzheimer's disease mainly describes cognitive deficits such as dementia and amnesia. After the inheritance and summary by medical experts of successive generations， the theory of "toxin damaging brain collaterals" has become a mature pathogenesis hypothesis of this disease. Blood stasis， as one of the main viral pathogens， is also closely related to the theory of Alzheimer's disease in modern pharmacology. Chuanxiong Rhizoma is used frequently in clinical prescriptions for Alzheimer's disease. As the main component of Chuanxiong Rhizoma， tetramethylpyrazine has a series of pharmacological effects on the cardiovascular system such as vasodilation， anti-platelet aggregation， anti-atherosclerosis， and anti-myocardial ischemia， which reflects the effects of Chuanxiong Rhizoma in activating blood circulation and removing blood stasis. However， few studies have focused on the effect of tetramethylpyrazine on the pathogenesis of Alzheimer's disease. From the perspective of TCM theory and modern pharmacology， this article discussed the effects of tetramethylpyrazine on the pathology and pathogenesis of Alzheimer's disease from the aspects of cardiovascular function， oxidative stress， inflammatory response， mitochondrial function， and cholinergic system and made prospects for the future application of tetramethylpyrazine to prevent and treat Alzheimer's disease.