Objective To investigate the functional protective effect of lycium barbarum polysaccharide (LBP) against light-in-duced retinal degeneration. Design experimental studies. Participants sixty SD rats were divided randomly into 6 groups. Methods Sprague-Dawley rats were exposed for 24 hours to 2000-lux cool white fluorescent light after treatment with LBP. Scotopic flash elec-troretinogram (ERG) were recorded before and on day D1, D6 and D14 after light exposure. The b-wave amplitude was statistic. In addi-tion, rats from each group were killed for retinal morphometric analyses. Main outcome Measure The amplitudes of b-wave of scotopic flash ERG, the histopathological changes. Results In the untreated group, light exposure caused collapse of the b-wave sensitivity curves. Bmax was reduced by 29.97% at D1 without subsequent recovery. Histopathology of the temporal superior central retinas of rats showed outer segment disorganization and shortening, the inner segments swelled and vacuolated, the outer nuclear layer thicknesses decreased markedly with subsequent recovery. In the treated groups, light exposure had a weaker effect on sensitivity curves. The values of b-wave amplitude were significantly increased than those in the exposed-untreated group (P=0.005). Retinal morphometry was pre-served. Conclusion LBP afford functional protection against light-induced retinal damage. (Ophthalmol CHN, 2009, 18: 229-233)

OBJECTIVE:To provide information about the current situations and trend of development in Chinese phar?maceutical trade.METHODS:We have generally overviewed the basic situation and existing problems in Chinese pharmaceu?tical trade and analysed and discussed its trend of development in the future.RESULTS&CONCLUSION:Chinese pharma?ceutical enterprises must think highly of their existing problems and the chances and challenges after entry into WTO,and take corresponding countermeasures to continually strengthen and improve their power of competition and jointly keep Chinese pharmaceutical trade healthy,constant and stable development.

Objective To study the gene polymorphism at position padi4_94 in Chinese Han people of Hebei Province and the characters of distribution.Methods 106 healthy individuals and 115 rheumatoid arthritis patients in Hebei Province were randomly selected. Padi4_94 gene was screened by sequencing of the promotor. The correlations between the SNP site and anti-cyclic citrullinated peptide antibody (anti-CCP) was discussed.Results There were three genotypes: AA, AG and GG in Chinese Han people of Hebei Province. No significant differences of gene frequency and allele gene frequency were found between healthy individuals and RA patients, and no correlation between SNP and the production of anti-CCP.Conclusions Hebei Province The gene polymorphisms at position padi4_94 existed in Chinese Han people of Hebei Province,but possibly would not affect RA susceptibility and the production of anti-CCP.

Objective To study the association of peptidylarginine deiminase 4 (PADI4) (padi4_94 and padi4_104) genetic single nucleotide polymorphism (SNP) and rheumatoid arthritis (RA) susceptibility in Han population of Hebei province. Methods This hospital-based case-control study included 115 RA patients and 106 healthy controls. All the individuals were recruited from Han Hebei residents and were randomly selected. The genotype and allele frequencies of PADI4 gene polymorphisms (padi4_94 and padi4_104) were analyzed by PCR-DNA sequencing method. Results The distribution of padi4_94 and padi4_104 genotypes between the two groups was not significantly deviated from that expected by Hardy-Weinberg equilibrium (P>0.05). The combined effect of padi4_94 and padi4_104 SNPs was analyzed and three haplotypos (AA, AG and GG) were found but without GA haplotype. The genotype and allele distribution of padi4_94 and padi4_104 in the patients with RA was not significantly different from that in healthy controls,and the analysis of haplotypes revealed that no haplotypes were risk factors for RA. Conclusion In Han population of Hebei province, the SNPs of PADI4 (padi4_94 or/and padi4_104) is no associated with RA susceptibility. Therefore, it should not be regarded as a genetic risk factor for RA.

Objective To evaluate the clinical value between peritoneal lavage cytology (PLC) and prognosis of gastric cancer. Methods The peritoneal lavage fluid of 60 gastric cancer patients and 12 noncancer patients were collected,different methods were used to examine the exfoliated cancer cells,and relationships between positive results and relative clinico-pathological parameters were evaluated.Results The positive rate of PLC was 31.8%,and was positively correlated with the degree of histologic differentiation of gastric cancer (P0.05). The postoperative one-year recurrence and survival rates of the positive and negative groups were significantly different(P

Objective Post-transcription RNA interference (RNAi) is more and more widely applied in multigene therapy.This study aimed to establish an subcutaneous xenotransplanted tumor (SXT) model of human HT-29 colon carcinoma in nude mice and investigate the effects of the survivin shRNA-APC double gene co-expression lentiviral vector on the growth of SXT.Methods Thirty-five nude mice were equally divided into five groups, double-gene survivin shRNA, survivin shRNA, APC, empty vector, and blank, and injected into the left anterior axillary with respective stably transfected cell lines and human HT-29 colon carcinoma cells, all at 2×106/mL, to establish an SXT model of human HT-29 colon carcinoma.The inhibition rate of tumor growth was calculated by measuring the size and weight of the SXT, the expressions of survivin mRNA and protein in the tumor tissue detected by real time PCR and immunohistochemistry respectively, and the apoptosis of the HT-29 colon carcinoma cells determined by TUNEL.Results The mean size and weight of the SXT were significantly reduced in the double-gene survivin shRNA-APC, survivin shRNA, and APC groups as compared with the blank and empty vector groups (P<0.05), though increased in the survivin shRNA and APC groups in comparison with the double-gene group (P<0.05).The expressions of survivin mRNA and protein in the tumor tissue were remarkably lower in the double-gene survivin shRNA-APC, survivin shRNA, and APC groups than in the blank and empty vector groups (P<0.05), even lower in the double-gene group than in the survivin shRNA, and APC groups (P<0.05).The apoptosis rate of the HT-29 colon carcinoma cells was markedly up-regulated in the double-gene survivin shRNA-APC ([56.72±3.17]%), survivin shRNA ([33.64±2.03]%), and APC groups ([31.19±1.79]%) as compared with the blank ([9.89±0.31]%) and empty vector groups ([10.06±0.43]%) (P<0.05), even more significantly in the double-gene than in the survivin shRNA and APC groups (P<0.05).Conclusion The survivin shRNA-APC double gene co-expression lentiviral vector can reduce the expression level the survivin gene, promote the apoptosis of colon carcinoma cells, and suppress the growth of the subcutaneous xenotransplanted tumor.

Objective To examine characteristics of patients with blood urea nitrogen (BUN) levels higher and lower than the normal limit.Methods During January 2012 to January 2015,116 patients with upper gastrointestinal diseases were selected to study,according to the patient's blood urea nitrogen level,all the patients were divided into high BUN group and low BUN group,and there were 76 patients in the high BUN group,and 40 patients in low BUN group,compared the biochemical indices,gastrointestinal bleeding forrest grading and disease severity of the two groups,and univariate logistic regression analysis.Results The serum white blood cell count,blood urea nitrogen,creatinine and glycated hemoglobin levels in patients of high BUN group [(9 593±5 012)× 102/μl,368.1±162.3 mg/L,11.2±3.7 mg/L and 6.38±1.08％] were significantly higher than that of low BUN patients [(6 804 ± 2 087) × 102/μl,121.0 ± 39.3 mg/L,8.1 ± 3.2 mg/L and 5.51 ± 0.42 ％] (t =3.645～12.659,all P＜0.05),and the hemoglobin levels (87.3±35.1 g/L) of the patients in high BUN group was significantly lower than that of the low BUN patients (108.0 ± 31.2 g/L) (t=3.252,P=0.032).Logistic regression analysis showed the presence of hemoglobin and glycosylated hemoglobin levelst of wo groups of patients was significantly different (P＜0.05),and showed that showed the highest correlation with BUN.Gastrointestinal bleeding forrest hierarchical data of the two groups of patients showed no significant difference (P＞0.05).The proportion of patients with gastric ulcers of high BUN patients was significantly higher than that of the low BUN patients (x2 =39.655,P=0.000).Conclusion Patients with high expression of serum urea nitrogen had more severe upper gastrointestinal bleeding,and it is worthy of attention in the process of clinical diagnostic.

Objective To study the role of manganese-enhanced MRI(MEMRI) in the depiction of cortical architecture of rat brain after systemic administration of Mn~(2+) through caudal vein and compare the effects of normal or opened blood-brain barrier on the manganese-enhanced MRI. Methods Fifteen SD rats were randomly divided into three groups according to ranked list of random. Blood-brain barrier was opened in short time by the injection of 30% mannitol via the right internal carotid artery, in group A, then 100 mmol/L MnCl_2 physiologic saline solution was delivered through vena caudalis, and MRI was performed 12 hours later. In group B, 100 mmol/L MnCl_2 physiologic saline solutions was administrated through vena caudalis, following normal saline injection into the right internal carotid artery, and MRI was performed 12 hours later. The group C served as normal control group. All images were acquired with a 7.0 T microMR scanner. Signal-to-noise ratios (SNR) in regions of interest were measured by Paravision 4.0 and the differences of three groups were compared by using one-way ANOVA. The differences of SNR on both sides of hemispheres were compared by using paired t test. Results MEMRI could show the gray matter and white matter of rat brain and the anatomy borders between somatosensory cortex and motor cortex clearly. Periventricular structures such as hippocampus, dentate gyms, habenula united, and olfactory bulb could also be showed clearly. Symmetrical enhancement on both sides of the cortex and banded structures was shown clearly in group B. The SNR increased and the differences were significant in right cerebral cortex, both sides of cerebellar cortex, hippocampus and pituitary, among three groups (right cerebral cortex 35.2±7.0,30.1±2.4,26.6±2.8,F =4.36,P=0.038;left cerebellar cortex 27.1±5.2,29.4±3.8,19.4±4.5, F=6.66, P=0.011;right cerebellar cortex 27.8±3.8,28.5±4.2,20.4±4.8, F=5.84, P=0.017; left hippocampus 34.5±4.9,38.1±5.3,24.5±3.6, F=11.38, P=0.002; right hippocampus 35.3±5.5, 37.6±4.7,25.6±3.0,F=9.93,P=0.003;pituitary 39.5±3.8,52.6±9.1,26.2±4.2,F=22.80, P=0.001) after systemic administration of Mn~(2+). Asymmetric enhancement on two sides of cortex was shown in group A. The mannitol-infused side was enhanced obviously but displayed blurring banded structures. However,the SNR differences of both sides of hemispheres in group A and B were not significant (P >0.05). Conclusions After systemic administration of MnCl_2 through vena caudalis, MEMRI could map the laminar architectures and the anatomy border of functional zone of somatosensory cortex specifically. High concentration of mannitol could open blood brain barrier(BBB) effectively and have distinct impacts on the architectures displayed in MEMRI. Opening or maintaining BBB in MEMRI had respective characteristics, and it should be selected according to practical needs.

AIM: To study the expression and the role of ERK1/2 and JNK1/2 of MAPKs pathways in the development of neural tube defects induced by hyperthermia. METHODS: The animal models of golden hamster were produced by hyperthermia. The expression of ERK1/2 and JNK1/2, and levels of their phosphorylation were measured by Western blotting in control group and hyperthermia group. RESULTS: p-ERK1/2 steadily expressed in each control group, and the expression of p-ERK1/2 significantly decreased, which was different from that in the corresponding control group (P<0.05). The activity of p-JNK1/2 increased in hyperthermia group and the amount of p-JNK1/2 increased as compared to control group. The peak appeared at 16 h after exposed to hyperthermia (P<0.05). CONCLUSION: Hyperthermia, which induces a decrease in p-ERK1/2 expression and increases the expression of p-JNK1/2 of MAPKs pathway, results in the unbalance of cell proliferation and apoptosis, and induces neural tube defects.

In vivo tumor imaging technique method based on bioluminescence principle was established to evaluate the anti-tumor effect of paclitaxel mixed micelle (PMM). MDA-MB-231 tumor cells with luciferase reporter vectors were firstly implanted into nude mice, and subsequently the luciferase substrate was regularly injected during intraperitoneal administration of PMM. Then the tumor size, growth and the intensity of light signals were monitored with in vivo imaging technique. The method of luciferase tumor in vivo imaging could be real-time, reliable and exact in labeling and reflecting the growth of tumors, and the observed results were consistent with that by conventional method, so it would be a feasible approach to study anti-tumor effect of drugs. The anti-tumor effect of paclitaxel mixed micelle was observed by this method, and the results showed that this formulation could inhibit growth of tumor, and the anti-tumor rate of it was about 85%.