Objective To investigate the antiviral property of a lead ligand, YK51 that was synthesized based on the flavanoid of a natural product toward dengue virus type-2 (DENV2) replication. Methods cRNA was isolated from HepG2 cells inoculated with 1 000 median tissue culture infective dose of DENV2 and treated with different doses of the ligand followed by RT-PCR to quantify the virus gene copies. Confocal microscopy of actin and tubulin redistribution was also performed. Results The quantitative RT-PCR result showed reduction of the DENV2 gene copies as the ligand concentration was increased. The confocal microscopy result showed increase in the tubulin intensity (79.6%) of infected BHK21 cells treated with the ligand, compared with the non-treated cells (54.8%). The 1.5-fold increase in the intensity of tubulin suggested that the ligand inhibitory effect stabilized the cellular microtubule structure. Conclusions The synthesized ligand YK51 reduced DENV2 viral load by inhibiting virus replication thus is highly potential to be developed as antiviral agent.

BACKGROUND: The purpose of this study was to promote organ donation by active identification and proper management of brain-dead donor with collaborating network system and to assume operating expenses in the setting of independent organ procurement organization (IOPO) in Korea. METHODS: Seoul National University Hospital and Gachon University Gill Hospital worked together as regional OPO during 8 months from April to December 2008. RESULTS: We constructed cooperative network system with five base-hospitals by MOU (memorandum of understanding). We visited 138 hospitals 223 times and built up brain-dead organ donation. Among total 265 dead patients in intensive care unit (ICU), 95 (36%) patients were considered as potential organ donors, but only 14 (14.7%) donated their organs actually. During the previous 8 months, there were 67 contacts for potential donor evaluation and total 100 solid organs were actually procured from 31 brain-dead donors except 4 cases. We also established and applied a flow chart and critical pathway of potential brain-dead donor. It was worthy of notice to manage 3 brain-dead donors and successfully procured their organs without donor transportation to HOPO. Apart from operating and depreciation expenses, we could estimate the expenses loss of mean 850,000 won per organ in the current system. CONCLUSIONS: Our results showed hope for success of IOPO in Korea which would be founded in the near future. Besides persistent active relationship with regional hospitals, a certain degree of financial support or other means such as increase of organ fee and medical insurance coverage should be considered.
Animals ; Brain ; Brain Death ; Critical Pathways ; Depreciation ; Fees and Charges ; Financial Support ; Gills ; Humans ; Insurance Coverage ; Intensive Care Units ; Korea ; Tissue and Organ Procurement ; Tissue Donors ; Transportation