ObjectiveTo investigate the changes of expression of intercellular adhesion molecule 1 (ICAM-1) on myocardial ischemic reperfusion injury(IRI) in old rats and the cardiac protective effect of Esmolol(ES). Methods116 rats were divided into three groups: IR group, IR+ES group and Sham group. The ischemic samples were observed in ischemia and 3,6,12,24 hours after IR. The myocardial levels of expression of ICAM-1 mRNA were evaluated by method of IN Situ Hybridization and the protein were evaluated by immunocytochemistry. The content of infiltration of polymorphonuclear neutrophils(PMNs), malomdialdehyde(MDA), superoxides dismutase(SOD) and the myocardial infarction area were measured too. ResultsAfter IR, myocardial levels of expression of ICAM-1 mRNA, protein,MDA and PMNs were increased significantly; SOD was decreased significantly. Between the levels of expression of ICAM-1 protein and PMNs, infarction area of myocardium, a close correlation were observed(P<0.05). In IR+ES group, all of the indicators were increased after IR, but the levels of increase in IR+ES group were more significantly modification as compared with IR group(P<0.05-0.01).Conclusions The findings indicate that PMNs could induce myocardial IRI after IR, which result from the ICAM-1 mediated PMNs adhesion.ES is able to decrease myocardial IRI by blocking the expression of ICAM-1 partially.

Acute Disease ; Humans ; Male ; Middle Aged ; Thrombocytopenia ; chemically induced ; Tyrosine ; adverse effects ; analogs & derivatives

To establish and manage of multicentral collection bio-sample banks of malignant tumors from digestive system, the paper designed a multicentral management system, established the standard operation procedures (SOPs) and leaded ten hospitals nationwide to collect tumor samples. The biobank has been established for half a year, and has collected 695 samples from patients with digestive system malignant tumor. The clinical data is full and complete, labeled in a unified way and classified to be managed. The clinical and molecular biology researches were based on the biobank, and obtained achievements. The biobank provides a research platform for malignant tumor of digestive system from different regions and of different types.
Biological Specimen Banks ; organization & administration ; Digestive System ; pathology ; Humans ; Neoplasms ; Specimen Handling

AIM: To investigate the mechanism of proliferation effect induced by (R,R)-XY-10 and (S,S)-XY-10 on retinal pigmented epithelial cells(ARPE-19).METHODS: Human retinal pigmented epithelial cells(ARPE-19) and human umbilical vein endothelial cells (HUVECs) were used to investigate the effect of (R,R)-XY-10 and (S,S)-XY-10 on cell growth,and their mechanisms of proliferative action by using ERK、 AKT、PI3K、Protein kinase C (PKC)and Nitric oxide synthase (NOS) inhibitors.RESULTS: (R,R)-XY-10 and (S,S)-XY-10 dose-dependently increased ARPE-19 cell proliferation,but not on HUVECs. When treated with proliferative inhibitors,H7(5μmol/L)、hypericin(20μmol/L)、PD98059(2μmol/L)、LY294002(50μmol/L)、SH-5 (10μmol/L) and L-NAME (100μmol/L),the proliferative effect was reduced by H7、hypericin、PD98059 and LY294002,but not by SH-5 and L-NAME.CONCLUSION: (R,R)-XY-10 and (S,S)-XY-10 can induce cell proliferation through MAPK and PI3K dependent pathway. KEYWORDS: age-related macular degeneration; (R,R)-XY-10; (S,S)-XY-10; ARPE-19 cells; human umbilical vein endothelial cells; proliferation

Background and purpose:Lower expression of E-cadherin is associated with metastasis of cancer cells, however, the correlation between E-cadherin and glucose metabolism has seldom been reported. This article studied the correlation between E-cadherin and glycolysis effect in PANC-1 cells.Methods:Through treatment of transforming growth factor β (TGF-β) in PANC-1 cells to decrease E-cadherin expression, knock-down the gene of E-cadherin interaction protein β-catenin, and overexpressing of E-cadherin, the effects of E-cadherin on the glucose uptake and lactate production ability and on the expression of key glycolytic genes were assessed.Results:E-cadherin negatively regulated the glycolytic effect of PANC-1 cells by inhibiting glucose uptake and lactate production (P<0.05). Moreover, E-cadherin interacting partner β-catenin signiifcantly promoted glucose metabolism transformation in PANC-1 cells (P<0.05). Moreover, key glycolysis regulator sirtuin 3 (SIRT3) could lower E-cadherin expression.Conclusion:Lower expression of E-cadherin induced the transformation of glucose metabolism transformation in PANC-1 cells and manipulation of E-cadherin expression level could change the glycolysis effect. Moreover, through maneuver glycolysis process could inhibit high metastatic potential of pancreatic cancer cells.

OBJECTIVETo investigate the influence of pinacidil preconditioning on the protection of the structure and respiratory function of injured myocardial mitochondria in scalded rats.

METHODSSeventy-five healthy Wistar rats, weighed 250 approximately 300 g, were randomly divided into three groups: i.e. control (n = 9, with intraperitoneal injection of 50 microg/kg isotonic saline), scald (n = 33, with 30% TBSA full thickness scald) and pre-conditioning (n = 33, with same extent of scald injury after intraperitoneal injection of 50 microg/kg pinacidil) groups. Mitochondrial ultrastructure was observed by transmission electron microscope. The mitochondrial respiratory function, the MDA content and the superoxide anion level were determined with corresponding methods.

RESULTSThe degree of injury to rat myocardial mitochondria in pre-conditioning group was less intensive than that in scald group (P < 0.05 or 0.01). The respiratory control rate in pre-conditioning group was obviously higher than that in scald group (P < 0.05), and the contents of MDA and superoxide anion in pre-conditioning group were markedly lower than those in scald group (P < 0.05 or 0.01), as evidenced by their contents at 3 post scalding hours (0.60 +/- 0.09 micromol/g and 0.127 +/- 0.020) were obviously lower than those in scald group (0.83 +/- 0.07 micromol/g and 0.169 +/- 0.015) (P < 0.01).

CONCLUSIONPinacidil preconditioning was beneficial in the protection of myocardial mitochondria in scalded rats, and it might be related to the pre-opening of potassium channel which was sensitive to mitochondrial ATP.

Animals ; Burns ; drug therapy ; metabolism ; pathology ; Cell Respiration ; drug effects ; Disease Models, Animal ; Mitochondria, Heart ; metabolism ; pathology ; Pinacidil ; therapeutic use ; Rats ; Rats, Wistar ; Superoxides ; analysis

Objective To construct the Neisseria surface protein A (NspA) DNA vaccine of Neisseria gonorrhoeae and evaluate the humoral and cellular immune responses induced by this vaccine in mice model.Methods The recombinant expression vector pcDNA3.1 (+)/NspA was constructed by inserting NspA gene into the eukaryotic expression vector pcDNA3.1 (+) and confirmed by poly merase chain reaction (PCR),restriction enzymes HindⅢ,XbaⅠand DNA sequencing.NspA mR- NA in transfected RAW264.7 cells and NspA protein expression in transfected COS-7 cells were de- tected by reverse transcription-polymerase chain reaction (RT-PCR) and immunohistochemical stai- ning,respectively.Forty-five male BALB/c mice were immunized with pcDNA3.1 (+)/NspA recom binant plasmid.The level of serum anti-Neisseria gonorrhoeae antibody of the immunized mice was detected by tube agglutination test,and the level of interieron (IFN)-?was assayed by enzyme-linked immunosorbent assay (ELISA).The proliferation of splenocytes was determined by methyl thiazolyl tetrazolium (MTT) colormetry.The NspA gene in BALB/c mice was identified by PCR with the total DNA extracted from quadriceps femoris in immunized sites.Results Restriction enzymes digestion a- nalysis and DNA sequencing results revealed that the pcDNA3.1 (+)/NspA had been constructed successfully.NspA gene had been transcripted and expressed in mammalian cells.The peak titer of specific antibody was 1:640 in pcDNA3.1(+)/NspA immunized group and there was no specific an- tibody detected in both pcDNA3.1 (+) immunized group and PBS group.The IFN-?level in pcD NA3.1 (+) immunized group was (23.79?11.85)pg/mL and that in pcDNA3.1 (+)/NspA immu- nized group was(169.71?30.52)pg/mL (P

Transmembrane protein p185 (the product of Her2/c-erbB-2 gene) is a member of the epidermal growth factor receptor (EGFR) family. Its overexpression was found in about 30% of breast cancer. It is essential to obtain soluble extracellular domain (ECD) of p185, especially disulfide bond rich domains, for identifying the epitopes of anti-p185 antibodies and researching the interrelationship between the antigen and antibody. The disulfide bond rich domain I-II and domain IV of p185 ECD were amplified from plasmid pBabe/erbB-2 by PCR respectively. These two fragments were inserted into pGEX/4T-1 vector, transfected into E. coli Origami B (DE3) pLysS and expressed inductively by low concentration of IPTG and low temperature overnight. After the pressure lysis of cells, the supernatants were analyzed by SDS-PAGE and the result demonstrated that this GST-fusion protein was expressed solubly in the amount of 10-15 mg/L. By the ELISA, Western blot and other immunological assays, the fusion proteins and their GST cut-off derivates both showed binding activities with several anti-p185 antibodies respectively. These results indicated that it was a feasible and effectual method to express disulfide bond rich domain I-II and domain IV of p185 ECD and this method may also be used to express other disulfide bond rich proteins.
Antibodies, Monoclonal ; immunology ; Disulfides ; immunology ; Escherichia coli ; genetics ; metabolism ; Genetic Vectors ; genetics ; Humans ; Receptor, ErbB-2 ; biosynthesis ; genetics ; immunology ; Recombinant Fusion Proteins ; biosynthesis ; genetics ; immunology ; Solubility ; Transfection

OBJECTIVETo observe the alteration of cardiac myocyte nuclear inositol 1,3,4,5-tetrakisphosphate receptor (IP(4)R) binding properties in rat subjected to myocardial ischemic reperfusion in order to further make it clear whether this change is involved in the molecule mechanism of cell apoptosis of rat with myocardial ischemic reperfusion.

METHODSExtracting of cardiac myocyte nucleus was accomplished by saccharose density gradient centrifugation method, the binding properties of nuclear IP(4)R in different conditions were detected by radioligand binding assay. Apoptosis index of myocardial cell was determined by using TUNEL assay.

RESULTS(1) Myocardial cell apoptosis index in rat heart underwent 30 min regional ischemia and 3 h reperfusion increased distinctly compared with that in control group (P < 0.01). (2) There were two IP(4) binding sites located to the nuclear envelope. (3) In ischemic reperfusion injury (IRI) group, Bmax from high affinity binding site of nuclear IP(4)R significantly increased compared with that in sham-operated group, whereas Bmax from low affinity binding site didn't change. Kd values of both sites were all significantly decreased by 63% and 55%, respectively. (4) Phosphorylation of nuclear IP(4)R by PKC increased markedly its binding ability both in IRI and control group (P < 0.05), which was more apparent in IRI group. (5) In sham-operated group, the binding ability of nuclear IP(4)R increased with increasing free calcium concentrations in cytoplasm, and the binding properties of IP(4)R in IRI group were also increased in the condition of calcium overloading.

CONCLUSIONThe increasing of binding properties of nuclear IP(4)R from ischemic reperfusion heart may be one of important mechanism involved in myocardial cell apoptosis, furthermore resulting in myocardial IRI.

Animals ; Apoptosis ; Cell Nucleus ; metabolism ; Male ; Myocardial Reperfusion ; Myocardial Reperfusion Injury ; metabolism ; pathology ; Myocytes, Cardiac ; metabolism ; Rats ; Rats, Wistar ; Receptors, Cytoplasmic and Nuclear ; metabolism

Autistic traits including social reciprocal deficits, communication deficits and stereotyped behaviors, are manifested not only in patients with autism spectrum disorders (ASD) and their families, but also in general population. In recent years, there has much research related to autistic traits. This article summarizes research advance of autistic traits in ASD relations and general population.
Child Development Disorders, Pervasive ; diagnosis ; Humans ; Magnetic Resonance Imaging ; Phenotype ; Severity of Illness Index ; Surveys and Questionnaires