• Korean Journal of Head & Neck Oncology
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• v.19 no.1
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• pp.25-33
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• 2003

Background and Objectives: The Herpes Simplex type 2 Defective Infectious Single Cycle virus (DISC virus) is attenuated virus originally produced as viral vaccines but are also efficient gene transfer vehicle. The main goals of this study were to examine the efficiencies of the gene transfer using DISC vectors for various head and neck squamous cell carcinoma cell lines and to evaluate the efficacy of vaccination with DISC virus carrying a immunomodulatory genes (GM-CSF) as cancer therapy in a organotopic oral cavity squamous cell cancer model. Materials and Methods : We determinated the gene transfer efficiency of DISC virus by x-gal stain method and proved gene and protein expression of DISC-GMCSF transfected SCCVII cells by RT-PCR and ELISA method. Also we evaluated the ex vivo vaccination effects of SCCVII/GMCSF (DISC-GMCSF transfected SCCVII vaccine) vaccine on preventing the recurrence of micro-residual tumor. After the vaccination of SCCVII/GMCSF, specific cytotoxic T-cell responses was evaluated by CTL assay. Results: At an MOI of 10 DISC virus showed 64-88% of transfection rates in various head and neck squamous cancer cell lines. SCCVII cells transduced by DISC virus vector (MOI=10) carrying the GM-CSF gene, produced 4.5 nanogram quantities of GM-CSF per $10^6$ cells. In vivo vaccination using tumor cells transduced ex vivo with DISC-GMCSF resulted in better protection rate against subsequent tumor recurrence in organotopic oral cavity cancer model. Although tumor free survival rate was not statistically significantly increased in vaccination group (p=0.078), tumor specific cytotocic T-cell responses were significantly increased in SCCVII/GMCSF vaccination group. Conclusion: These data demonstrate that; 1) The DISC virus vector is capable of efficient gene transfer to various head and neck squamous cancer cell lines, 2) GM-CSF secreting genetically modified tumor vaccine (SCCVII/GMCSF) efficiently protected against tumor recurrence in organotopic micro-residual oral cavity cancer model and produced tumor specific cytotoxic T-cell response. DISC virus-mediated, cytokine gene transfer may prove to be useful as a clinical therapy for head and neck cancers.

• Microbiology and Biotechnology Letters
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• v.40 no.4
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• pp.396-402
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• 2012

The chemical composition, anti-porcine epidemic diarrhea virus (PEDV) activity and antimicrobial activity of Artemisia dubia essential oil were evaluated in this study. Fifty eight compounds from A. dubia essential oil were identified through analysis by gas chromatography-mass spectrometry (GC-MS). The major constituents of the oil were camphor (17.18 %), germacrene-D (15.70%), trans (${\beta}-$) racaryophyllene (6.79%), ene thujones (6.57%), 1, 8-cineole (5.94%) and camphene (5.08%). The essential oil was evaluated for antiviral activity against PEDV in Vero cells using a cytopathic effect (CPE) reduction method. The oils actively inhibited PEDV replication with a 50% inhibitory concentration ($IC_{50}$) of 43.7 ${\mu}^3/mL$. The 50% cytotoxicity concentration ($CC_{50}$) of the oils was over 100 ${\mu}/mL$ and the derived therapeutic index was >2.3. Similar analysis of the ribavirin revealed that they have a relatively weaker efficacy when compared to the oils. The antimicrobial activity of the essential oil against 5 microorganisms was evaluated by the disc diffusion method. The essential oil exhibited antimicrobial activity against 5 tested microorganisms with a clear zone of 8-22 mm. Among the tested microorganisms, Streptococcus pyogenes was the most sensitive and Candida albicans the least. Therefore, in can be concluded that essential oils of A. dubia may have interesting applications for microbial control or the control of PEDV-derived diseases.

• Journal of fish pathology
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• v.18 no.3
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• pp.239-245
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• 2005

Galla Rhois was extracted with various solvents such as ethyl alcohol, ethyl acetate, n-hexane, and n-butyl alcohol, and antibacterial activity of the extracts were also tested. The ethyl acetate extracted Galla Rhois showed high antibacterial activities and was the most effective extract, was further fractionated into 8 subfractions with silica gel column chromatography. The subfractions 4 and 5 exhibited an excellent antibacterial activity against Streptococcus iniac KCTC3657.

• Clinical Pain
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• v.20 no.2
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• pp.131-134
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• 2021

We report a rare case of anti-viral agent induced hypophosphatemic osteomalacia presented with localized and radicular pain. A 51-year-old man, who had been taking adefovir for chronic hepatitis, had experienced low back pain radiating to his right thigh for 2 years. With impression of lumbar disc herniation, he underwent magnetic resonance imaging and found multi-level disc herniation with facet joint synovial cysts. He received transforaminal epidural steroid injections, however, symptoms did not improve. To find other possible causes, additional tests were performed. Blood tests revealed hypophosphatemia and increased serum alkaline phosphatase, and osteoporosis was noted in dual-energy X-ray absorptiometry with multiple hot uptakes in bone scan. After replacement of adefovir to entecavir and supplement of phosphate and vitamin D, phosphate level and the clinical symptoms were improved. This is the first to report the presentation of osteomalacia due to anti-viral agent as radicular low back pain with facet synovial cysts.

• Journal of dental hygiene science
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• v.3 no.2
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• pp.67-70
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• 2003

The biological effects of the crude extracts from medicinal plants, Brachyglottis monroi and Trichocolea hatcheri were investigated. The crude ethanol extract inhibited the growth of the Gram positive bacterium Bacillus subtilis (ATCC 19659, 1 mm inhibition zone at $150{\mu}g/disc$) and the dermatophyte Trichophyton mentagrophytes (ATCC 28185, 6 mm inhibition zone at $150{\mu}g/disc$), and was toxic to P388 murine leukaemia cells ($IC_{50}$ $23.96{\mu}g/mL$ at $75{\mu}g/disc$). B. monroi ethanol extract showed stronger antiviral activity than that of T. hatcheri against Herpes simplex Type I virus (ATCC VR 733) and Polio Type I virus (Pfizer vaccine strain) (50% activity, @ 5 mg/ml at $150{\mu}g/disc$). The crude ethanol extract of T. hatcheri showed stronger antimicrobial activity than that of B. monroi. However, this extract was inactive against P388 murine leukaemia cells.

• Korean Journal of Plant Tissue Culture
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• v.22 no.3
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• pp.149-155
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• 1995

The coat protein (CP) gene was cloned from RNA genome of the Cucumber Mosaic Virus strain ABI (CMV-ABI) isolated in Korea. The comparisons of the nucleotide sequence of the cloned CP gene and its deduced amino acid sequences with other CP genes revealed that the CMV-ABI belongs to subgroup I (type I), CMV-ABI developed the typical mosaic symptom in infected plants. Tobacco plants (Samsun and NC82) were transformed by leaf-disc transformation via Agrobacterium, temefaciens LB4404 harboring pVCP, witch CMV-ABI CP gene was inserted into the pBI121, and a number of mature transgenic tobacco plants were developed. Southern and PCR analysis of genomic DNA from the transgenic plants showed that the CP gene was integrated into the genomes of the most of the transgenic plant. Result of the segregation patterns of resistance in T1 seedlings of the plants to kanamycin showed that the transgenic plants containing l,2 and 3 copies of CP gene were50%, 39% and 11% of the total transgenic plants, respectively.

• Applied Biological Chemistry
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• v.38 no.3
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• pp.224-231
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• 1995

To increase the expression of a foreign protein in transgenic plant, the benefits of 5'-untranslated leader sequences of tobacco mosaic virus (TMV) RNA or soybean glycinin gene, Gy2, fused to a protein coding sequence were exploited. pGA643-derived plasmid contains 355 promoter of cauliflower mosaic virus, protein coding sequence of maize 10 kDa zein (10kZ) and Gy2 terminator. The leader from Gy2 or TMV RNA was inserted between the promoter and the coding sequence in each construct. The recombinant DNAs were introduced into tobacco plants by Agrobacterium mediated leaf disc transformation method. Although the transgene without the leader had more transcripts than the others, mRNAs containing the leader were translated more efficiently. It might be due to difference in the length of 5'-untranslated sequence and context surrounding the AUG codon, but could be sequence specific rather. These results suggest that the leader sequences of Gy2 and TMV play important roles as an enhancer in translational control of foreign gene in transgenic tobacco plant.

• Journal of Life Science
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• v.21 no.9
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• pp.1244-1250
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• 2011

The study was performed to evaluate the antibacterial and antiviral activities of ginseng fine root in order to search for antibacterial substances. Among 8 kinds of fermentation strains, Lactobacillus plantarum was selected based on viable cell count and antibacterial activities during incubation. Optimum conditions of ginseng fine root fermentation for L. plantarum were incubation at $35^{\circ}C$ for 48 hr in 5% ginseng fine root broth. That methanolic extract of fermented ginseng fine root broth was observed to be antibacterial and have antiviral activities. The results of paper disc method of non-fermented extract and fermented extract measured against E. coli was 11 mm and 20 mm, S. aureus was 15 mm and 22 mm, respectively. Shaking flask method was observed to inhibit the growth E. coli and S. aureus in fermented extract by 99.9%. However, antiviral activity of Feline calicivirus (FCV) was mostly activated. Fermented extract was used to investigate the compositional changes of ginsenosides on HPLC analysis. By fermentation, ginsenoside Rg1, Re and Rd were increased, with Rd showing a significant increase of 50 ${\mu}g/g$. These results suggest that ginseng fine root extract is a useful resource.

• Journal of Plant Biotechnology
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• v.29 no.2
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• pp.93-98
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• 2002

A VP6 fragments was subcloned with BamHI in the binary pMBP-1 vector under Califlower Mosaic Virus (CaMV) 355 promoter and neomycin phosphotransferase II (npt II) gene. The recombinant binary vector was mobilized into Agrobacterium-tumefaciens LBA4404 by the freeze-thaw method and potato (Solanum tubensum L. cv Desiree) was transformed by modified leaf-disc cocultivation. Shoots were induced on MS medium with 0.01 mg/L NAA, 0.1 mg/L GA$_3$, 2.0 mg/L Zeatin, 100.0 mg/L kanamycin, 500.0 mg/L carbenicillin. In order to identify the copy number of VP6 into potato plant, total genomic DNA was isolated from transgenic potato and analysed by Southern blotting. Genomic DNA and total mRNA analysis demonstrated the incorporation of the foreign gene into the potato genome, as well as their transcription.

• Korean Journal of Poultry Science
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• v.32 no.4
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• pp.225-229
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• 2005

Microinjection of recombinant retrovirus beneath the blastoderm of non-incubated chicken embryo is now the most widespread method for generating transgenic chickens, but transgenesis rates are very low. So to improve this problem, we first introduced retrovirus vector carrying RSV-GFP gene to an one-cell embryo culture system. To investigate whether retrovirus could work on an one-cell chicken embryo, we microinjected the concentrated retrovirus stocks into the germinal disc of one cell or stage-X chicken embryos. Analysis of reporter gene expression on day 4 embryos showed that GFP expression was observed in the only stage-X chicken embryo but was not in the one-cell embryo group. These results suggest that retrovirus system is the most efficient method to generate transgenic chickens in the stage-X embryo.