BACKGROUND: Vascular dementia is a syndrome characterized by cognitive impairment, which is induced by ischemic or hemorrhagic apoplexy or ischemic-anoxic brain injury. It is assigned to "imbecility", "dementia", "sluggish consciousness", "susceptible to forget things" etc. By traditional Chinese medicine. Impairments of memory and cognition etc. Caused by dementia seriously affect psychosomatic health and quality of life of elderly people.OBJECTIVE: To observe the effects of shuanggen cephalocathartic decoctum on learning, memory and spatial discrimination ability of vascular dementia rats.DESIGN: Randomized control trail taking experimental animals as objects.SETTING: Teaching and Research Section of Basic Theory of Traditional Chinese Medicine, Preclinical Medicine College, Nanjing University of Traditional Chinese Medicine.MATERIALS: The experiment was performed in Laboratory of Viscerastate of Teaching and Research Section of Basic Theory of Traditional Chinese Medicine, Preclinical Medicine College, Nanjing University of Traditional Chinese Medicine, from January to February 2004. A total of 40 male SD rats were selected and randomly divided into sham operation group, model group, model plus traditional Chinese medicine group and model plus Western medicine group, with 10 in each group. Before the experiment, all the rats were adaptively fed for one week, free drinking and eating before and during the experiment. Medicine and reagent are shuanggen cephalocathartic decoctum and Nimotop tablet, and main experimental apparatuses are DTT-2 jumping apparatus and SMG-2 water maze apparatus.METHODS: Blood was collected from left ventricle under aseptic condi tion, and dried in incubator at 37 ℃, after trituration, it was sifted with sieve of 200μm meshes and embolus was prepared. 1 mg embolus and 0.3 mL physiological saline was mixed and shaken up into suspension. Common carotid artery was temporarily occluded with a vascular clamp, and external carotid artery was retrogradely intubated and the embolus suspension was injected into encephalon to establish model of multiple cerebral infarction. In sham operation group, canulate tubule was intubated only to the bifurcation of common carotid artery, with no fluid injected in. Before the experiment, rats in model group and sham operation group were normally fed, while rats in model plus traditional Chinese medicine group were additionally given shuanggen cephalocathartic decoctum [4 g/(kg·d)] infusion and rats in model plus western medicine group were additionally given Nimotop [2 mg/(kg·d)] infusion, once a day for consecutive 15 days. Passive escape jumping experiment was conducted on rats in each group on the 9th day.Recorded the reaction time for rat jumping onto the rubber cushion after electric shock and the frequency of mistakes of suffering electric shock due to jumping down from the platform in 3 minutes, and took the results as learning indexes. The test was repeated on the 10th day. Put the rat into the box for 3-minture adaptation, then put it on the rubber cushion; recorded the latency for rat first jumping down from the rubber cushion and the frequency of jumpingdown from the rubber cushion in 3 minutes, and took the results as memory indexes. Water maze spatial discrimination experiment was conducted on rats in each group on the 11th day, recorded the frequency of mistakes of rats entering dead end and the latency for landing on safe platform. Every time, took a 40-second rest after swimming. Each rat was trained 10 times a day for consecutive three days. MAIN OUTCOME MEASURES: Results of passive escape jumping experiment and water maze spatial discrimination experiment. RESULTS: Each group had a rat dead in the process of operation except sham operation group in which all rats moved normally. Totally 37 rats entered results analysis. ① Results of passive escape jumping experiment: On the 9th day, compared with model group, the reaction time of rats in sham operation group, model plus traditional Chinese medicine group and model plus western medicine group significantly shortened (P < 0.01 -0.05), the frequency of mistakes in 3 minutes remarkably decreased in sham operation group and model plus traditional Chinese medicine group (P < 0.05); on the 10th day, the latency was significantly prolonged in sham operation group as compared with model group (P < 0.05); compared with model group, the frequency of mistakes in 3 minutes significantly decreased in sham operation group, model plus traditional Chinese medicine group and model plus western medicine group (P < 0.05). ② Results of water maze spatial discrimination: On the 3rd day, compared with model group, the frequency of mistakes of rats entering dead end significantly decreased in sham operation group, model plus traditional Chinese medicine group and model plus western medicine group (P < 0.001-0.05); the frequency of mistakes in model plus traditional Chinese medicine group obvi ously decreased as compared with model plus western medicine group (P < 0.05). During the 2nd and 3rd days of water maze experiment, the time for the rat reaching terminal was significantly shortened in sham operation group, model plus traditional Chinese medicine group and model plus western medicine group as compared with model group (P < 0.05).CONCLUSION: Shuanggen cephalocathartic decoctum can significantly improve learning and memory ability of rat model of vascular dementia, and is more effective than Nimotop in the aspect of improving spatial discrimination ability of rat.

With the goal of practice teaching for laboratory medicine students, we focus on culti-vating students' clinical thinking and scientific thinking through setting up reasonable teaching task and designing the scientific graduation thesis, and try to develop a novel practice teaching mode for laboratory medicine students. Therefore, we do exploration and practice in the following aspects: orientation training, clinical practice, medical ethics education, clinical communication ability, and scientific research design, hoping to improve students' research thinking ability and innovation ability. Through actual operation and graduation thesis writing, we try to help students to establish and improve their clinical thinking ability and innovation ability.

Clinical biochemical test course construction in the new medical model, first of all, requires a combination of subject characteristics of the course, and proceeds with the improvement from the teaching methods and evaluation system. Secondly, we should cultivate students' doctor-patient communication skills and humanities quality in the teaching process. Finally, we should establish the effective clinical biochemical test teaching mode to achieve both teaching and learning.

Objective To investigate the renal protection of Chinese cobra venoms (CCV) and its mechanism in renal ischemia/reperfusion (I/R). Methods Thirty-two rats were divided into four groups. 0.1% CCV was separately infused into abdominal cavity at 0.5 h, 24 h before reperfusion in group Ⅰ and Ⅱ . Group Ⅲ suffered from kidney I/R was served as pathological control. Group Ⅳ was sham operation group. BUN and Scr were measured before ischemia and 24 h after reperfusion. Complement C3 was observed at 0, 0.5, 2, 24 h after reperfusion. The kidney samples were examined by HE stain under light microscopy. Apoptosis was detected by terminal deoxynucleotidyl transferase mediated dUTP-biotin in situ nick-end labeling(TUNEL). Results Significant histological damage, apoptosis of tubular cell and impaired renal function were found in group Ⅰ and Ⅲ.The above indexes decreased to a less extend in group Ⅱ (P

Objective To study the inhibition activity of volatile oil from Mappianthus iodoies on SPC-A-1 and BEL-7402 cancer cells.Methods The volatile oil in Mappianthus iodoie was extracted by SFE-CO2.MTT assay was employed to test the antitumor effect of volatile oil from Mappianthus iodoies in two kinds of malignant tumor cell lines,with IC50 applied to evaluate the degree of inhibition activity.Results When the dose of volatile oil from Mappianthus iodoies was 200 μg/ml,the inhibition ratios of the tumor cell was in excess of 50％,the IC50 was 169.54,695.21 μg/ml respectively.Conclusion Volatile oil from Mappianthus iodoies extracted by SFE-CO2 has obvious inhibition activity on SPC-A-1 and BEL-7402 cancer cells.

BACKGROUND:Through compounding hydroxyapatite and poly-DL-lactide, the mechanical properties, physical and chemical properties of the implants can be enhanced.
OBJECTIVE:To detect the effect of hydroxyapatite/poly-DL-lactide composite internal fixation screws in canine femoral condyle cancel ous bone fracture repair.
METHODS:Forty-two beagle dogs were operated to bilateral femoral condyle fracture models. The left side was fixed using hydroxyapatite/poly-DL-lactide screws as experimental group;while the right side was fixed with pure poly-DL-lactide screws as control group. After 2, 4, 8, 12, 24, 36 and 48 weeks, conditions of fracture were observed using X-ray, femoral and screw specimens were observed histopathological y, and the bending strength and the average molecular weight were detected. The biological absorption rate, intensity decay rate and biodegradation rate were calculated.
RESULTS AND CONCLUSION:After 2-48 weeks, bilateral fractures were fixed wel and new bone grew wel , but the biological absorption rate of the screws in the experimental group was lower than that in the control group (P ≤0.01). In the first 2, 4 weeks, the bending strength of the experimental screws was higher than that of the control screw (P ≤0.05), but the biodegradable speed was slower in the former one (P ≤ 0.05 or P ≤ 0.01). The pathological changes were similar in the two groups. After 48 weeks, the fractures were healed and bone tissue reconstruction was completed. Compared with the pure poly-DL-lactide screws, the hydroxyapatite/poly-DL-lactide composite internal fixation screws have better fixation effects, biocompatibility, mechanical properties and biodegradability.

Child ; Child, Preschool ; Female ; Humans ; Infant ; Intracellular Signaling Peptides and Proteins ; genetics ; Male ; Membrane Proteins ; genetics ; Nephrotic Syndrome ; ethnology ; genetics ; WT1 Proteins ; genetics

Combined training is a new training mode which combines the education of profes-sional degree of clinical medicine graduate and the resident standardization training. Xiangya hospital of Central South University has tried this kind of training mode since 2012. We draw lessons from the advanced training concept in America in combination with the practical situation of our hospital and have established theXiangya-Yalemodel of resident standardization training featuring with the Six Xiangya goals which areprofessional ethics, professional skills, patient safety, medical ethics, teamwork spirit, innovation and self-improvement, highlighting the project manager responsibility system, 360 degree examination and assess-ment, assessment of the OSCE, Mini-CEX evaluation. Through comparing and analyzing the midterm exami-nation scores between the combined training group and non-combined training group, we have found that the combined training group is significantly superior to non-combined training group on clinical skills. In addition, the questionnaire survey results show that most graduate students have positive attitude tocombined training. They believe it will be helpful for them to improve the ability of clinical skills, med-ical practice, doctor-patient communication skills and theoretical knowledge, and contributes to the future career development. Combined training is one major initiative deepening the reform of medical health system and medical education which greatly promotes the development of our country health enterprise, although there still exist some flaws including training teachers, content, implementation, management and evaluation.

Objective To construct the eukaryotic expression vector of pcDNA3.1(+)/NOR1 and analyze the effect of NOR1 on the liver cancer cells. Methods NOR1cDNA was cloned into eukaryotic expression vector pcDNA3.1(+), recombinant eukaryotic expressing plasmid pcDNA3.1(+)/NOR1 was transiently introduced into human liver cancer cell line HepG2 mediated by cation iron lipofectamin.The biology effect of NOR1 on the liver cancer cells was analyzed through the MTT test, trypan blue exclusion assay and flowcytometric analysis. Results The eukaryotic expression vector of pcDNA3.1(+)/NOR1 was successfully constructed.The liver cancer cell growth rate was obviously slow after it was transfected by recombinant plasmid pcDNA3.1(+)/NOR1 and the cell cycle from G0/G1 to S distinctly prolong.Conclusions Recombinant plasmid pcDNA3.1(+)/NOR1 can express in HepG2 cells and affect the growth of HepG2 cells.

Carbon Monoxide ; physiology ; Humans ; Nervous System Diseases ; physiopathology ; Neurotransmitter Agents ; physiology ; Nitric Oxide ; physiology