Biomedical subjects

Lichun Wang

Publications and source records attributed to Lichun Wang.

4 recordsLinked to original sources

PubMed2003

Studies of marine sulfated polymannuroguluronate on endothelial cell proliferation and endothelial immunity and related mechanisms.

Anti-proliferation action and enhancement of endothelial cell immunity and related mechanisms by marine sulfated polymannuroguluronate (SPMG) were investigated in the present studies. Endothelial cell proliferation was evaluated by MTT assay. Intercellular adhesion molecule-1 (ICAM-1) expression was analyzed by flow cytometry. The interaction of SPMG with basic fibroblast growth factor (bFGF) was evaluated by surface plasmon resonance. Results showed that SPMG exhibited a significant inhibitory effect against proliferation in both normal human umbilical vein endothelial cells (HUVEC) and bFGF-treated HUVEC, the action of which was completely abrogated by bFGF antibody. SPMG exerted high affinity to bFGF in a multivalent pattern, characterized by one molecule SPMG binding to 3 - 4 molecules of bFGF. Moreover, SPMG enhanced ICAM-1 expression in HUVEC and prevented and restored bFGF-treated downregulation of ICAM-1 expression in HUVEC, the expression of which was not counteracted by bFGF antibody. In conclusion, this is the first report demonstrating that SPMG exerted an anti-proliferation effect dependent on the bFGF-regulated pathway and afforded upregulatory activity on ICAM-1 expression regardless of the involvement of bFGF.

Alginates↗

PubMed2003

In vivo adaptive response of the peripheral conduit artery in patients with borderline systolic hypertension.

OBJECTIVE: To investigate elastic changes of the radial artery, a medium-sized muscular peripheral conduit artery, in patients with borderline systolic hypertension. METHODS: Using a non-invasive high-resolution echo-tracking device coupled to a photoplethysmography (Finapres system) allowing simultaneous arterial diameter and finger blood pressure monitoring, we measured radial artery elastic parameters of 20 patients with borderline systolic hypertension and 20 normal subjects according to Langewouters model. RESULTS: The diameter of the radial artery of control subjects and those with borderline systolic hypertension at the isobaric level of 100 mmHg and mean arterial pressure was similar, but the compliance and distensibility at similar conditions in patients with borderline systolic hypertension did not further reduced and even increased. CONCLUSION: In patients with borderline systolic hypertension, the adaptive responses of the radial artery compliance and distensibility to increased pressure were directed to maintain its elasticity, contributing to the homeostasis of the cardiovascular system.

Adaptation, Physiological↗

PubMed2002

An SR-protein induced by HSVI binding to cells functioning as a splicing inhibitor of viral pre-mRNA.

The interaction between a virus and its specific receptor on the membrane of the host cell mimics the physiological combination of signal ligand and its receptor, and initiates the specific signal transduction from this activated receptor to induce a relative gene response. During the investigation of the interaction between Herpes simplex virus I (HSVI) and human fibroblast via the virus binding to its receptor complex on the cellular membrane, a new gene of cellular response against the specific stimulation of HSVI binding to fibroblasts was cloned from a cDNA library established from mRNA of an early gene response. This gene encoded a protein of 14.9kDa with the structural characteristics of Arg-rich and RS repeats. The analysis of the role of this protein in the infection by HSVI indicated that this protein, expressed only in G(1)/S phase and phosphorylated, functioned as a splicing inhibitor of HSVI pre-mRNA. The details of the mechanism of this inhibition of HSVI pre-mRNA splicing is still unclear.

Amino Acid Sequence↗

PubMed2002

XEMBL: distributing EMBL data in XML format.

UNLABELLED: Data in the EMBL Nucleotide Sequence Database is traditionally available in a flat file format that has a number of known shortcomings. With XML rapidly emerging as a standard data exchange format that can address some problems of flat file formats by defining data structure and syntax, there is now a demand to distribute EMBL data in an XML format. XEMBL is a service tool that employs CORBA servers to access EMBL data, and distributes the data in XML format via a number of mechanisms. AVAILABILITY: Use of the XEMBL service is free of charge at http://www.ebi.ac.uk/xembl/, and can be accessed via web forms, CGI, and a SOAP-enabled service. SUPPLEMENTARY INFORMATION: Information on the EMBL Nucleotide Sequence Database is available at http://www.ebi.ac.uk/embl/. The EMBL Object Model is available at http://corba.ebi.ac.uk/models/. Information on the EMBL CORBA servers is at http://corba.ebi.ac.uk/

Computer Communication Networks↗