OBJECTIVE: To investigate the effects of irbesartan and enalapril on the blood pressure and the expression of related plasma molecule-marker in SHR rats.METHODS: Forty SHR were randomly divided into irbesartan group(SHR-I),enalapril group(SHR-E),irbesartan-enalapril group(SHR-IE) and blank control group(SHR-C).Another ten WKY rats were assigned to normal group(WKY).The blood pressure and activities of sICAM-1 and PAI-1 were measured after 16-week's intragastric administration with corresponding drugs,and then the results were compared with those before experiment.RESULTS: As compared before treatment,there were significant differences in blood pressure in all drug-treated groups after treatment(P

Objective To explore the causes and treatment measures of hyponatremia after liver transplantation. Methods The clinical data of 27 patients with hyponatremia after liver transplantation were analyzed retrospectively. Results Among the 27 patients, postoperative hyponatremia occurred in 25 cases in about one week, and preoperative hyponatremia occurred in 2 cases and severe ~hyponatre -mia occurred immediate after operation. Acute hyponatremia occurred in one case. Blood natrium was 130 to 135 mmol/L in 10 cases, 120 to 130 mmol/L in 12 cases and less than 120 mmol/L in 5 cases. The levels of blood potassium, phosphor and calcium were all normal. Urinary natrium, potassium and chlorine levels were all normal. The ascites natrium level was higher than blood natrium at the same time. Hyponatremia was treated by supply of hypertonic saline via gastrointestine an/or veins. Conclusion Various causes could result in hyponatremia after liver transplantation. The hyponatremia was treated by supply of hypertonic saline constantly and slowly.

BACKGROUND: Most of hematopoietic growth factor regulates proliferation and differentiation of blood cells through JAKs-STATs signal transduction pathway. Total saponins of Panax ginseng (TSPG) can promote in vitro differentiation of CD34+ hematopoietic progenitor cells into erythroid cells, with similar effectiveness of hematopoietic growth factor.Erythropoietin receptor (EpoR) expression on the cell membrane of progenitor cells is critical during the erythroid differentiation process.OBJECTIVE: To investigate the molecular mechanism of TSPG to induce erythroid cells through erythropoiesis and its receptor-mediated JAK2/STAT5 signal transduction.DESIGN, TIME AND SETTING: An in vitro cytological observation. The study was performed at the Department of Histology and Embryology, Institute of Basic Medicine, Chongqing Medical University from May 2006 to October 2008.MATERIALS: Umbilical cord blood of normal full-term pregnancy was provided by the First Hospital of Chongqing Medical University. TSPG, purity＞95%, provided by Chongqing Institute of Traditional Chinese Medicine, was diluted in RPMI-1640 for work concentration of 1 g/L and degermed by positive pressure filtration.in RPMI-1640 culture solution containing horse serum, with various dilutions of TSPG (0 as blank control, 10, 25, 50, 75,100 mg/L). The MNCs were cultured on 96-well culture plate, with 0.2 mL in each well. Early erythroid cells were counted on were harvested and cultured separately in RPMI-1640 culture solution containing 10% horse serum as control group and in TSPG (25 mg/L)- conditioned culture system as experimental group. 5 U/mL Epo was added for 0, 2, 5 and 30 minutes.Immunoprecipitation of JAK2/STAT5 was used for the effect of TSPG on Epo/EpoR-induced tyrosine phosphorylation of JAK2/STAT5.MAIN OUTCOME MEASURES: Effect of TSPG on proliferation of erythroid progenitor cells from human umbilical cord blood;Effect of Epo on the proliferation of hematopoietic cells; Effect of TSPG on EpoR expression of the umbilical blood cells; tyrosine phosphorylations of JAK2 and STAT5.RERULTS: TSPG (10-75 mg/L) promoted the colony formation of BEU-E, CFU-E, and the preferential differentiation into erythroid lineage cells was most induced from 25 mg/L of TSPG. Using the colorimetric MTT assay, MNCs exhibited proliferative responses to Epo (2-50 U/mL) reaching maximum at 5 U/mL Epo. The addition of TSPG did not increase the expression of EpoR after MNCs were incubated in the presence of with or without TSPG for 24 hours. The pretreatment with TSPG for 24 hours enhanced Epo-induced tyrosine phosphorylation of JAK2 and STAT5 (STAT5a and STAT5b).

Objective:To analyze the infectious ODDS risks of anticancer plant alkaloids and other anticancer drugs in GI cancer patients with chemotherapy regiments.Method:2384 profiles of cancer patients agreeable with studying condition were collected.All the profiles were evaluated with different variants,and then these variants were analyzed with the logistic liner.Result:The line values of ages,days in hospital,insurances,alkylating agents,platinum antitumor com- pounds and other antitumor drugs were 0.010,0.147,-0.361,-0.930,-0.390,and-1.306.Conclusion:The infection OR of the ages and days in hospital increased OR factors and the medical insurances decreased OR factors.Antitumor antibiot- ics,antimetabolites,plant alkaloids had their higher infectious risks than platinum antiturnor compounds,alkylating agents and other antitumor drugs did in GI cancer patients with chemotherapy regiments.

TcdA and B toxins secreted by Clostridium difficile( CD) are two important causes of diseases in organisms. The expression of tcdA and tcdB genes is regulated by a few factors located in the pathogenicity locus ( PaLoc) .Studies have indicated that the tcdC gene is likely to act as a negative regulator of toxin gene expression.So far, it has been debatable whether tcdC gene is regarded as a negative regulator.The mechanism of tcdC gene in pathogenesis remains unclear.In this paper, the structure and function of the tcdC gene are summarized, which will help study the mechanism of tcdC gene and obtain optimal drug targets.

Objective To compare the consistence and difference between the assay results of the second generation of Tg (Tg Ⅱ) and the first generation of Tg (Tg Ⅰ) immunoassay,as well as to evaluate the impact of Tg Ⅱ on the clinical management of thyroid diseases.Methods Serum samples of 249 patients (30 with benign thyroid disorders and 219 with DTC;64 males and 185 females,average age 43.0 years)were collected and assayed by Tg Ⅱ and TgⅠ kits simultaneously.The measuring ranges of TgⅠ and TgⅡ were 0.10-1 000.00 μg/L and 0.04-500.00 μg/L,respectively.Data were analyzed by the Wilcoxon rank sum test and Spearman correlation analysis using IBM SPSS 19.0.Results The assay results of TgⅡ and TgⅠ strongly correlated (rs =0.979,P＜0.05).However,the median value of TgⅡ (2.31 (0.06-13.17) μg/L) was lower than that of TgⅠ(3.63(0.41-16.84) μg/L)(z=-13.25,P＜0.001).The difference between Tg Ⅱ and Tg Ⅰ got bigger when TgⅠ value decreased more.TgⅡ values were 11.09％ lower than TgⅠ (5.61(1.07-26.39) μg/L) vs 6.31(2.07-33.93) μg/L;z=-4.78,P＜0.05) in 30 patients with benign thyroid disorders and 37.71％ lower (2.18(0.07-7.47) μ.g/L) vs 3.50(0.39-10.18) μg/L;z=-9.02,P＜0.001) in 108 DTC patients without 131 Ⅰ treatment.But the above changes had no influence on clinical diagnosis and treatment.In the 71 DTC patients post 131Ⅰ treatment with low TSH and normal TgAb,there were 3 cases with TgⅠ＞1.0 μg/L but TgⅡ＜1.0μg/L,and 12 cases with TgⅠ＞0.1 μg/L but TgⅡ＜0.04 μg/L.Conclusions Serum TgⅡand Tg Ⅰ assay results are strongly correlated,though Tg Ⅱ value is slightly lower than Tg Ⅰ value.This difference may have no significant influence on the clinical diagnosis of thyroid diseases.However,TgⅡ may be better to evaluate the curative effect in some DTC patients post 131Ⅰ therapy.

Traditionally,antigen presenting cells were shown to express MHC Ⅱ antigens.However,some researchers have demonstrated that a subset of T lymphocytes could express MHCⅡ antigens in some situation.Its regulatory mechanism and biological effects remains challenging to researchers.This review provides an overview of the results of these MHC Ⅱ + T lymphocytes regarding to the generation,mechanisms,and the role in immune tolerance induction,aim to provide some insights in clinical immune tolerance induction.

BACKGROUND: The assessment of chronic nerve root injury is mainly depend on indirect evidences of imaging results.OBJECTIVE: This study is designed to find out the relationship between the degrees of the pathological changes of nerve roots and motor evoked potential (MEP) changes due to chronic compression.DESIGN: A self-controlled trial with animals as subjects.SETTING: Spine Surgery Department of the Second Clinical Hospital of Jinan University.MATERIALS: The trial was completed in the Spinal Surgery Department of the Second Clinical Hospital of Jinan University from October 2001 to May 2003. The subjects were 30 healthy cats of either gender weighing 3 to 5 kg.INTERVENTIONS: The compression model was established by wedging a Ⅴ-shape bone flap into the right intervertebral foramens between C7, C8 and T1 vertebrae. The left foramens served as controls. The cats underwent CT examination on the 2nd, 4th, 8th and 12th postoperative week to show the foramen changes. Six randomly selected cats underwent magnetic stimulation MEP each time on the 2nd, 4th, 8th, 12th and 24th week. The injuries to the compressed nerve roots were assessed according to Mackinnon Standard and they were compared with the MEP wave.MAIN OUTCOME MEASURES: Whether the superficial magnetic stimulated MEP monitoring result was in correspondence with the pathological changes of the chronically compressed nerve roots.RESULTS: The MEP did not show any abnormal changes for Grade Ⅰ injury prolonged to 9.6- 10. 2 ms. There was almost no evoke potential at all stimulation points for grade Ⅴ nerve root injury.CONCLUSION: That the injured nerve root presents dysesthesia and normal MEP results suggests grade Ⅰ injury. Prolonged latency including prolonged F wave suggests grade Ⅱ injury. And additional amplitude decrease together with widened and unclassifiable waves implies the injury be grade Ⅲ. The prominent features of grade Ⅳ nerve injury is much more decreased amplitudes and more prolonged latency. For grade Ⅴ injury there is always disappearance of whole MEP or some potential components. The superficial magnetic stimulated MEP monitoring results are in correspondence with the pathological changes of the nerve roots due to chronic compression, which means MEP monitoring results could serve as the quantitative indication to pathological changes of nerve injury.

Objective The aim of our study was to investigate the effects and mechanisms of ghrelin on neovascularization in atherosclerosis plaque. Methods 30 male New Zealand rabbits were randomly divided into normal control group ( CON group) , atherosclerosis model group ( AS group) , and ghrelin treatment group ( ghrelin group) , and each group of 10 rabbits. The AS group and ghrelin group underwent balloon-induced arterial wall injury and then fed with high fat diet, the CON group was fed only on a regular diet. They were all fed for 3 months. Then the ghrelin group was given ghrelin 25μg·kg-1 ·d-1 , the other two groups received the same amount of sterile normal saline only. Four weeks later, body weight and blood lipids were detected. The thickness ratio of the intima to media was measured by HE staining. Degree of intra-plaque angiogenesis was evaluated by CD31+ cells immunohisto-chemistry. The vascular endothelial growth factor ( VEGF ) and vascular endothelial growth factor receptor 2 ( VEGFR2) were detected by quantitative realtime PCR and Western blot. The expressions of matrix metalloproteinase ( MMP)-2 and MMP-9 were detected by immunohistochemistry and Western blot. Results ( 1 ) No significant differences in body weight and blood lipids were found between the AS group and the ghrelin group(P>0. 05), but both items were significantly higher than those of the CON group(P<0. 05). (2)The thickness ratio of the intima to media in the ghrelin treated group was distinctly less than that in the AS group(P<0. 05). (3)Compared with the AS group, the ghrelin group showed significantly decreased microvascular density and the expressions of VEGF and VEGFR2 (P<0. 05). (4)Compared with the AS group, ghrelin dramatically inhibited the plaque contents of MMP-2 and MMP-9 ( P<0. 05 ). Conclusions Ghrelin is able to inhibit the growth of neovascularizationin in the atherosclerotic plaque and the development of plaque. And these beneficial effects derive from downregulation of VEGF, VEGFR2, MMP-2, and MMP-9 at the advanced stage of atherosclerosis in rabbits.

As tremendous genomic data avalanches, exploring biological mechanism by data analysis and theory methods has become important for theoretical biology research. This method is significant for the study of complex gene functions and gene networks. Bowers used higher order logic relationships to decipher protein network organization, which is a systemic method called logic analysis of phylogenetic profiles (LAPP). LAPP is a data modeling and different from traditional computational methods. This computational approach identifies logic relationships of the elements (or components) in complex networks through the logic analysis of their expression data. The method can be used to infer functional relationships of two associated proteins to one another. It is important for discovering the new function mechanism of the protein. The clusters of orthologous groups (COGs) involved in a gene network usually are large groups and therefore LAPP is also an approach for complex gene logic networks. After the establishment of the gene logic network, it is convenient for the regulation of gene through the network. The method can used in many fields, such as species evolution, oncologic diagnosis and so on. LAPP was systematically described and analyzed and recent developments in methodologies and applications were highlighted. Some opinions of them were also given.