Objective To observe the alteration of astrocyte and apoptosis in neonatal hypoxic-ischemic encephalopathy(HIE).Me-thods The pathological brain specimens of 25 newborns who died of HIE were observed macroscopically and microscopically,included male 14 cases and female 11 cases.The immunochemistry staining with glial fibrillary acidic protein(GFAP)and in situ end terminal dexynucleotidy 1 transferase mediated deoxyuridine triphosphate-biotion nick and labeling(TUNEL)methods were used to observe the changes of astrocyte and the neurons apoptosis in HIE.The relationship between the change of astrocyte and the neurons apoptosis and the occurrence of HIE and course of disease were further synthetically analyzed.Results The brain specimens of 25 newborn HIE had apoptosis cells at the different level.The degree of apoptosis of cerebral neurons was severe in the cases of 24 h-6 d survival(P

Combining the structural features of picotamide and linotroban, a series of N,N'-bis-(halogenophenyl)-4-methoxybenzene-1, 3-disulfonamides were designed and synthesized on the basic principles of drug design. The structures of target compounds were confirmed by IR, 1H NMR and HR-MS, and the in vitro antiplatelet aggregation activity was evaluated by Born turbidimetric method with adenosine diphosphate (ADP) as the platelet aggregation inducers. The assay results showed that twelve compounds (4b, 4f, 4l, 5b, 5d-5g, 5j, 5k, 5m and 5n) were found to have superior anti-platelet aggregation activities than the positive drug picotamide. The preliminary structure-activity relationship (SAR) has been explored.
Adenosine Diphosphate ; Drug Design ; Phthalic Acids ; Platelet Aggregation ; Platelet Aggregation Inhibitors ; chemical synthesis ; chemistry ; Structure-Activity Relationship ; Sulfonamides ; chemical synthesis ; chemistry

OBJECTIVETo explore the mechanisms of electro-acupuncture (EA) in improving synaptic plasticity after cerebral ischemic injury.

METHODSFocal cerebral ischemia (FCI) model was established by middle cerebral artery occlusion (MCAO) with heat-coagulation method. The changing rules of synaptic ultrastructure, synaptophysin (P38), growth-associated protein-43 (GAP-43), brain-derived neurotrophic factor (BDNF) and nerve growth factor (NGF) in the ischemic cortex 2 and 5 weeks after FCI and the effects of EA on them were observed.

RESULTSExpression of numerical density (Nv), surface density (Sv), volume density (Vv), post synaptic density (PSD) and P38 in the ischemic cortex significantly decreased after MCAO (P<0.01). Among them, Nv and Sv were raised at the 5th week in FCI rats either treated or untreated with EA (P<0.01), but the increment of Sv was higher in those of the treated rats (P<0.01); PSD in the EA treated rats also showed a significant increase at the 5th week, which was significant higher than that in those untreated; EA showed insignificant influence on Vv and synaptic interfacial curvature; P38 lowered continuously after 2 weeks, but at the 5th week, it was higher in EA treated rats than that in untreated rats (P<0.01), while at the 2nd week, the levels in treated and untreated rats were equal. GAP-43 rose in the 2nd week after modeling, with no difference between EA treated and untreated animals, at the 5th week, it was lowered in untreated rats to near that in sham-operated rats, but maintained at higher level in EA treated rats; NGF and BDNF positive cells significantly increased after modeling (P<0.01), and showed a descending trend with the time going (P<0.01) both in rats treated or untreated with EA.

CONCLUSIONEA can protect synaptic ultrastructure, promote the expression of P38, GAP-43, NGF and BDNF in the ischemic cerebral cortex, and thus improve synaptic plasticity in cerebral ischemic rats.

Acupuncture Therapy ; Animals ; Electroacupuncture ; Female ; Infarction, Middle Cerebral Artery ; physiopathology ; therapy ; Male ; Neuronal Plasticity ; Random Allocation ; Rats ; Rats, Sprague-Dawley ; Synapses ; physiology

In the reductive branch, glycerol is first dehydrated to 3-hydroxypropionaldehyde that is then reduced to 1,3-PD under the consumption of reducing power (NADH). If over-expression of the gene dhaB encoding glycerol dehydrase is achieved,the reducing power will be scarce and 3-hydroxypropionaldehyde will be accumulated,which is disadvantage to produce 1,3-propanediol.The structure gene yqhD from E.coli encoding 1,3-propanediol oxidoreductase isoenzyme[under the consumption of reducing power (NADPH)]and the gene dhaB encoding glycerol dehydrase from Klebsiella pneumoniae was amplified using PCR method.The two gene were transferred into expression vector pEtac to construct a novel recombinant Klebsiella pneumoniae (pEtac-dhaB-tac-yqhD).Over-expression of yqhD and dhaB in Klebsiella pneumoniae was achieved with pEtac-dhaB-tac-yqhD.The fermentation result on aerobic conversion showed the increase of 20% of 1,3-propanediol yield by Klebsiella pneumoniae(pEtac-dhaB-tac-yqhD) was obtained compared with Klebsiella pneumoniae.The main by-products,acetic acid and butanediol decreased estrogen receptors 30% obviously.

Pestalotiopsis photiniae is one of the predominant pathogens of strawberry root rot disease. Based on preliminary research, it was proved that crude toxins were main pathogenic substances of the pathogen. For further investigation and utilization of toxins produced by this fungus, conditions of producing toxins were analyzed with the leaf disk method in this experiment. The result showed that pH values, cultural time, vibration, and tested temperatures obviously affected the production of toxins, except for light treatment. The most suitable culture conditions for the toxin production were pH 6.2, 25?C, darkness and stillness, for 5 d～7 d. Besides, it was discovered that crude toxins could significantly inhibit seed germination and elongation growth of roots or shoots for maize, rye and mung bean.

AIM To study the effect of Vit E on the MLCK activity and expression in the liver of atherosclerosis model rabbits. METHODS The MLCK activity of rabbit liver was measured by the method of ?- 32P incorporated and its expression was detected by immunofluorescent. RESULTS The model of atherosclerosis was estabilished. After rabbits were fed with cholesterol for four weeks and twelve weeks, the activity of MLCK increased markedly, and there was significantly statistical difference compared with the normal control (P0.05). MLCK expression increased after the rabbits was fed with cholesterol for four weeks, and this increase became more obvious had been the rabbits was fed with cholesterol for twelve weeks. The expression decreased when vitamin E had been added into the cholesterol fed. CONCLUSION The pathology of liver may be associated with the increase of the activity of MLCK. Vit E may reduce MLCK activity and protect hepatocyte from injury.

Objective To evaluate laparoscopic continuous circulatory hyperthermic intraperitoneal chemotherapy (CHIPC) in the treatment of malignant ascites from peritoneal carcinomatosis.Methods From March 2006 to March 2008, 21 patients of malignant ascites secondary to peritoneal carcinomatosis received CHIPC with three courses of treatment for each patient. The first course was performed in operation room under general anesthesia, the second and third were performed in patients ward or intensive care unit (ICU), NS solution of mitomycin-C and cisplatin was delivered by continuous circulatary perfusion into peritoneal cavity at a rate of 500 ml/min for 90 min with an inflow temperature of 43 degrees C. Results Intraoperative course was uneventful in all cases, and mean operative time was (80 ± 18) min. There was no postoperative deaths and severe complications. After treatment patients KPS KPS (Karnofsky,KPS)grades rose from 10-40, with an average rise of (22.2 ± 2.4) (P ＜ 0.01). After laparoscopic CHIPC, clinical complete regression of ascites and related symptoms was achieved in 19 patients, and partial remission achieved in 2 patients. Follow-up was made to all patients until the death which occurred at post laparoscope-assisted CHIPC 1 - 9 months, with a median survival time of 6 months.Two patients who underwent partial remission suffered from port site seeding and tumor metastasis leading to death after treatment at 1 and 2 months respectively. Conclusions Laparoscopy-assisted CHIPC is effective for the treatment of malignant ascites from inoperable peritoneal carcinomatosis and improves the quality of life of these patients.

Objective To discuss the clinical characteristic and diagnosis of children with moyamoya disease(MMD).Method The clinical features of 4 children with MMD were analyzed.Results The early clinical spectrum in children with MMD was transiently ischemic attack,and presented with injured neuron manifestations after some seizures,such as paralysis,extremity sensory disturbance, seizure of epilepsy,language disorder,involuntary movement and psychotic symptoms.Magnetic resonance angiography(MRA) and DSA demonstrated multiple cerebral vessels occlusion or stenosis and moyamoya vessels,so MRA became the first choice for detec- ting MMD.Conclusions The clinical symptom and neuron symptom of children MMD may not be typical,and it is easily misdiagnosed.Its correct diagnosis depends on thorough physical examination,appropriate laboratory tests,and the general knowledge of this disease.

Objective To investigate the role and intracellular signal transduction mechanism in the injury of renal tubular cells induced by postasphyxial-serum in neonate.Methods Human renal proximal tubular cell(HK-2 cell) was used as target cell. The experiment was designed as:control group, asphyxia group ,and pyrrolidine dithiocarbamate (PDTC)blocking group. The attacking concentration of serum was 20%, and the apoptosis rate of HK-2 cells was detected by flow cytometer.Results Compared with controls[(13.3?1.70)%],after being stimulated with postasphyxial-serum, the apoptosis rate of HK-2 cells of asphyxia group [(46.73?3.68)%] and PDTC blocking group [(31.19?2.79)%]were significantly increased(P

Objective To learn more about the clinical and laboratory features of childhood paroxysmal nocturnal hemoglobinuria(PNH) and to improve the diagnosis.Methods The clinical and laboratory features of 12 cases of PNH were analyzed,who were diagnosed from January 2000 to November 2004,and the positive responses to treatments were observed.Results 1) The youngest age of onset was 2 years;the disease often manifested with anemia(100%),recurrent infections(50%) and hemorrhages(33%),occurring mainly in skin and mucosa.No patient developed a thrombosis.2) 66.7% of the patients showed peripheral blood cytopenia.Dysplasia of bone marrow was observed in 25% of patients.Fifty percent of them had an increased percentage of erythroid lineage.3) Positive hemolytic tests included urine OB 41.6%,Ham′s test 33.3% and Rous′ test 25%.Glycosyl-phosphatidyl inositol(GPI) deficient cells were found in 100% of the patients.4) 57.1% of patients was improved after being treated with adrenocortical hormone,androgens or cysporin.Conclusions Besides hemoglobinuria,peripheral blood cytopenia were also the common manifestation of PNH.Flow cytometry based immunophenotypic methods for the analysis of CD_(55) and CD_(59) may improve the diagnosis of PNH.J Appl Clin Pediatr,2006,21(3):153-154