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Objective@#To investigate the expression of Golgi protein 73 (GP73) in liver cirrhosis and its assistant value in grading of liver cirrhosis.@*Methods@#A total of 160 patients with liver cirrhosis (96 males, 64 females, age: (58.6±10.3) years) and 60 healthy controls (35 males, 25 females, age: (53.5±12.2) years) were included to detect the GP73 level. Serum levels of alpha-fetoprotein (AFP), albumin (ALB), total bilirubin (TBIL) and prothrombin time (PT) were also measured. The correlations between the above indicators and the GP73 level were analyzed with Pearson correlation. The GP73 levels among patients with different Child-Pugh grading and different CT morphological grading were compared using one-way analysis of variance and the least significant difference t test. The receiver operating characteristic (ROC) curve analysis was used to analyze the diagnostic sensitivity and specificity of GP73/AFP for liver cirrhosis.@*Results@#The area under the ROC curve for GP73 was 0.886 with the cut-off value of 144.5 μg/L. The sensitivity of GP73 in the diagnosis of liver cirrhosis was 70.4%, and the specificity was 87.8%. After combining with AFP, the sensitivity and specificity were elevated to 71.6% and 90.2% respectively. GP73 levels among patients with different Child-Pugh grading and those with different CT morphological grading were significantly different (F: 3.15, 2.82, both P<0.05), and GP73 levels among groups also showed significant differences (all P<0.05). The GP73 level was correlated with AFP, ALB, TBIL, and PT (r values: 0.362, -0.428, 0.672, 0.575, all P<0.01).@*Conclusion@#Serum GP73 level increases with progression of liver cirrhosis, and it has an assistant value in the diagnosis of liver cirrhosis.
ABSTRACT
Objective To investigate the expression of Golgi protein 73 ( GP73) in liver cirrhosis and its assistant value in grading of liver cirrhosis. Methods A total of 160 patients with liver cirrhosis (96 males, 64 females, age:(58.6±10.3) years) and 60 healthy controls (35 males, 25 females, age: (53.5± 12.2) years) were included to detect the GP73 level. Serum levels of alpha-fetoprotein (AFP), albumin ( ALB) , total bilirubin ( TBIL) and prothrombin time ( PT) were also measured. The correlations between the above indicators and the GP73 level were analyzed with Pearson correlation. The GP73 levels among pa-tients with different Child-Pugh grading and different CT morphological grading were compared using one-way analysis of variance and the least significant difference t test. The receiver operating characteristic ( ROC) curve analysis was used to analyze the diagnostic sensitivity and specificity of GP73/AFP for liver cirrhosis. Results The area under the ROC curve for GP73 was 0.886 with the cut-off value of 144.5μg/L. The sensitivity of GP73 in the diagnosis of liver cirrhosis was 70.4％, and the specificity was 87.8％. After combining with AFP, the sensitivity and specificity were elevated to 71.6％ and 90.2％ respectively. GP73 levels among patients with different Child-Pugh grading and those with different CT morphological grading were significantly different ( F:3.15, 2.82, both P<0.05) , and GP73 levels among groups also showed sig-nificant differences (all P<0.05). The GP73 level was correlated with AFP, ALB, TBIL, and PT (r val-ues:0.362, -0.428, 0.672, 0.575, all P<0.01) . Conclusion Serum GP73 level increases with progres-sion of liver cirrhosis, and it has an assistant value in the diagnosis of liver cirrhosis.
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Objective To investigate the clinical application of examination of specific IgG4 to food allergens.Methods Specific IgG4 as well as specific IgE to ten kinds of food allergens in sera of 51 patients with chronic eczema was examined by ELISA.Results Food allergen specific IgG4 was positive in 35 patients (68.6%) and food allergen specific IgE was positive in 45 patients(88.2%)of the 51 cases (P
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BACKGROUND: Acidic peptide is the tripeptide composed of 3 glutamic acids, which cannot bring excitatory nerve signal transmission into playlike single glutamic acid through presynaptic release and integration withpostsynaptic NMDA receptor directly as excitable neurotransmitter. It is quite possible that acidic peptide plays its actions by integrating with multiple metabolic glutamic acidic receptors so as to promote neuron proliferation or release nerve growth factor (NGF). OBJECTIVE: To probe into whether acidic peptide induces changes in learning and memory of model rats with Alzheimer disease (AD).DESIGN: Randomized controlled single experiment was designed.SETTING: Teaching-Research Room of Biochemistry and Molecular Biology of Basic Medical College of Zhengzhou University.MATERIALS: The experiment was performed in 2nd Research Room and Experimental Animal Room of Teaching-Research Room of Biochemistry and Molecular Biology of Basic Medical College of Zhengzhou University.Totally 100 SD male rats were selected and some of them were excluded due to retarded response in step down test. Totally 84 rats were included in the experiment and randomized into 7 groups, named normal control,model group, physiological saline group (PS group), piracetam group, acidic peptide groups of 60, 30 and 15 mg/kg, 12 rats in each group. Acidic peptide is a new small molecular peptide separated from bovine brain in this research team and is tripeptide composed of three glutamic acids.METHODS: Except normal control, in the rest groups, after 1 week routine breeding, cerebral stereotactic microinjection was used to inject 5 μg ibotenic acid in hippocampus of rats to destroy bilateral Meynert's basal ganglia to establish AD model. In normal control and model group, no medication was applied. In PS group, physiological saline was used for gastric perfusion. In piracetam group, piracetam of 0.3 g/kg was used for gastric perfusion and in acidic peptide groups of 15, 30 and 60 mg/kg,acidic peptide of 60, 30 and 15 mg/kg was applied for gastric perfusion successively, continuously for 20 days, once per day, 2 mL/time. On the expiration of gastric perfusion, learning and memory of rats were examined with step down test in every group. The animal was placed on the safe table on step down platform to adapt to the environment for 3 minutes, afterwards, 36 V electric current was given. Error response was recorded if the animal jumped to the copper railings after electric shock and correct response was recorded if the animal jumped back the safe area. Step-up latent phase and frequency of correct response were recorded in 3 minutes.MAIN OUTCOME MEASURES: Comparison of learning and memory of rats in every group. RESULTS: Totally 84 rats were all included in the result analysis. ①Comparison of learning in every group: Compared with model group, stepup latent phase was shortened remarkably in every acidic peptide group[(102.03±5.33), (71.77±4.38), (68.28±9.53), (69.13±8.79) s, P ＜ 0.01] and the frequency of correct response was improved remarkably [(12.92±2.91),(16.17±2.79), (15.83±3.27), (16.33±2.53) times, P ＜ 0.01]. ② Comparison of memory in every group: Compared with model group, step-up latent phase was shortened remarkably in every acidic peptide group [(43.17±4.66),(29.78±4.48), (26.20±3.28), (22.09±4.43) s, P ＜ 0.01] and the frequency of correct response was improved remarkably [(15.67±2.15), (20.92±2.68),(20.83±2.29), (20.25±2.05) times, P ＜ 0.01].CONCLUSION: Acidic peptide can shorten remarkably the step-up latent phase of AD rats in step down test and improve the frequency of correct response. It is indicated that acidic peptide provides good intervention on learning and memory of rat model of Alzheimer disease.
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BACKGROUND: It is pointed in some experiment that acidic peptide improves learning and memory of model rat with Alzheimer disease (AD) by inhibiting the synthesis of toxic compounds of nitric oxide (NO).OBJECTIVE: Animal model with Alzheimer disease was established to observe the changes in the levels of NO, nitric oxide synthase (NOS) and acetylcholinesterase (AChE) treated with acidic peptide of various dose concentration.DESIGN: Randomized control and single experiment.SETTING: Teaching-Research Room of Biochemistry and Molecular Biology of Basic Medical College of Zhengzhou University.MATERIALS: The experiment was performed in 2nd Research Room and Experimental Animal Room of Teaching-Research Room of Biochemistry and Molecular Biology of Basic Medical College of Zhengzhou University.Totally 100 SD male rats were selected and some of them were excluded due to retarded response in step down test. Totally 84 rats were included in the experiment and randomized into 7 groups, named normal control,model group, physiological saline group (PS group), Piracetam group, acidic peptide groups of 15, 30 and 60 mg/kg, 12 rats in each group. Acidic peptide was a new small molecular peptide separated from bovine brain and is tripeptide composed of three glutamic acids.METHODS: Except normal control, in the rest groups, after 1 week routine breeding, cerebral stereotactic microinjection was used to inject 5 μg ibotenic acid in hippocampus of rats to destroy bilateral Meynert's nucleus basalis to establish AD model. In normal control and model group, no medication was applied. In PS group, physiological saline was used for gastric perfusion. In piracetam group, piracetam of 0.3 g/kg was used for gastric perfusion and in acidic peptide groupsof 15, 30 and 60 mg/kg,acidic peptide of 15, 30 and 60 mg/kg was applied for gastric perfusion successively, continuously for 20 days, once per day, 2 mL/time. On the expiration of gastric perfusion, the rats were sacrificed after anesthetized and the brain was collected on ice plate to prepare tissue homogenate. After centrifugated at 1 000 r/minute, 4℃ for 10 minutes, the supernatant was collected to assay the levels of NO, NOS and AChE with NO, NOS and AChE kits successively.MAIN OUTCOME MEASURES: Levels of NO, NOS and AChE in brain of rat in each groupRESULTS: Totally 84 rats were employed in the experiment and all entered result analysis. Comparison of levels of NO, NOS and AChE in rat brain of each group: compared with model group, NO levels in acidic peptide groups of 15, 30 and 60 mg/kg were reduced remarkably[(1.95±0.20), (1.39±0.10), (1.25±0.07), (1.00±0.04) mmoL/kg, P ＜ 0.05],NOS levels were reduced remarkably [(4.53±0.18), (3.39±0.09), (3.10±0.06),(2.97±0.06) μmol/kg, P ＜ 0.05] and AChE did not change remarkably[(0.67±0.12), (0.71±0.11), (0.72±0.08), (0.72±0.07) mmol/L, P ＞ 0.05].CONCLUSION: Acidic peptide reduces significantly the synthesis of NO and NOS in brain of AD rat, but it dose not affect AChE activity remarkably. It is suggested that acidic peptide improves learning and memory of rat with Alzheimer disease probably by inhibiting the synthesis of toxic compound of NO or its toxicity.