• The Journal of the Korean Society for Microbiology
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• v.11 no.1
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• pp.13-18
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• 1976

The rabbit anti-rat brain associated ${\theta}(RBA{\theta})$ serum wich was obtained by immunization of rabbit with DA rat brain tested against rat lymphoid tissues for cytotoxicity, indirect immunofluorescent staining and ability to inhibit a graft-vs-host reaction. It was founded that the antiserum was a potent anti-${\theta}$ like antiserum, and rat brain associated ${\theta}$ antigen was cross-reactive with mouse thymocytes and brain antigen. Using the RBA ${\theta}$ sera, distribution of ${\theta}$-bearing lymphocytes in rat lymphoid tissues was detected. And it was found that approximately 98% of thymocytes, 70-76% of lymph node lymphocytes, 72% of peripheral blood lymphocytes, 36-44% of spleen lymphocytes, and 4% of bone marrow were ${\theta}$-bearing.

• Korean Journal of Veterinary Service
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• v.33 no.4
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• pp.345-351
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• 2010

Toxoplasma gondii is a species of parasitic protozoa in the genus Toxoplasma. The definitive host of T. gondii is the cat, but the parasite can be carried by the vast majority of warm-blooded animals, including humans. It is often found in the tissues of food animals including pigs and sheep. To determine the regional prevalence of infection with T. gondii, bloods (n=300) from domestic pigs and tissues (n=200) from slaughter pigs in Gyeongnam province were tested using an enzyme-linked immunosorbent assay (ELISA) and a polymerase chain reaction (PCR) for detection of antibody and antigen. A total of 115 sero-positive pigs were identified for a prevalence rate of 38.3%. Of the 50 herds from domestic pigs tested, 34 had at least one sero-positive pig for a herd prevalence rate of 68.0%. Sero-positive rates of pigs in fattening farm were higher than that of pigs in breeding company. Sero-positive rates of sows were higher than that of growing pigs. Seasonally, sero-positive rates of pigs were highest in winter (80.0%) and lowest in spring (23.8%). According to farm size, sero-positive rates of pigs were higher in small size farms (${\leq}$2,000) than that of big size farms (>2,000). However, none of the bloods (n=300) from domestic pigs and tissues (n=200) from slaughter pigs were positive for T. gondii specific DNA by PCR.

• Parasites, Hosts and Diseases
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• v.56 no.2
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• pp.167-173
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• 2018

Malaria is one of the most important public health problems in tropical areas on the globe. Several factors are associated with susceptibility to malaria and disease severity, including innate immunity such as blood group, hemoglobinopathy, and heme oxygenase-1 (HO-1) polymorphisms. This study was carried out to investigate association among ABO blood group, thalassemia types and HO-1 polymorphisms in malaria. The malarial blood samples were collected from patients along the Thai-Myanmar border. Determination of ABO blood group, thalassemia variants, and HO-1 polymorphisms were performed using agglutination test, low pressure liquid chromatography and polymerase chain reaction, respectively. Plasmodium vivax was the major infected malaria species in the study samples. Distribution of ABO blood type in the malaria-infected samples was similar to that in healthy subjects, of which blood type O being most prevalent. Association between blood group A and decreased risk of severe malaria was significant. Six thalassemia types (30%) were detected, i.e., hemoglobin E (HbE), ${\beta}$-thalassemia, ${\alpha}$-thalassemia 1, ${\alpha}$-thalassemia 2, HbE with ${\alpha}$-thalassemia 2, and ${\beta}$-thalassemia with ${\alpha}$-thalassemia 2. Malaria infected samples without thalassemia showed significantly higher risk to severe malaria. The prevalence of HO-1 polymorphisms, S/S, S/L and L/L were 25, 62, and 13%, respectively. Further study with larger sample size is required to confirm the impact of these 3 host genetic factors in malaria patients.

• Journal of Physiology & Pathology in Korean Medicine
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• v.18 no.2
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• pp.580-585
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• 2004

BJYGC is often clinically used as a treatment of allergic rhinitis. This study was aimed to find out the effect BJYGC would have on the helper T cell, and how it can promote the subsets of helper T cells to regain their balance that they lost due to immunological diseases. Splenocytes were prepared from BALB/c mice was cultured without stimulation in the presence of BJYGC for 48 hr. The viability of CD4 T cells from Balb/c mouse were measured at various concentrations of BJYGC using the MTS assay. It was somewhat increased up to concentration of 400 ㎍/ml, but did not show any significant difference. Proliferation was measured using the MTS assay, CD4 Th cells were stimulated with anti-CD3/28 in the presence of BJYGC for 48 hr. As evidence for rapid T cell activation, CD25 expression by flow cytometry was evaluated at 10, 50, 100 and 200 ㎍/㎖ of BJYGC. Th cell differentiation experiments were performed to examine whether BJYGC can affect the Th polarization process. CD4 T cells were activated in culture under neutral, Th1-polarized or Th2-polarized conditions in the presence of BJYGC at 10, 100 and 200 ㎍/㎖. Cytokine production was measured by ELISA. This experiment proved that BJYGC could inhibit the secretion of both IL-4 and IFN-γ in neutral condition and polarized condition, too. Considering that BJYGC shows an excellent effect on treating allergies, the author can conclude that its pharmacological action may be associated with decreased IL-4 and, it may also regulate IFN-γ depending the host's need. Also, it was discovered that Th1 cell was pathologic in chronic inflammatory tissue specific diseases, such as insulin dependent diabetes mellitus, multiple sclerosis, RA, and uveitis. We are counting on the BJYGC to be able to control the tendency of Th1 cell predominancy in an immune reaction.

• Journal of Microbiology and Biotechnology
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• v.8 no.6
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• pp.560-567
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• 1998

We have found that Thermoactinomyces vulgaris KFB-Cl00 produces a chitinase. The optimum temperature and pH of the enzyme activity were $55^{\circ}C$ and 6.5. The enzyme was stable after heat treatment at $80^{\circ}C$ for 30 min and stable in acidic and basic conditions (PH 6.0~11.0). The thermostable endo-chitinase from Thermoactinomyces vulgaris KFB-C100 was cloned into the plasmid pBR322 by using E. coli DH5$\alpha$ as a host strain. The positive clone carrying a recombinant plasmid (PKCHI23) with a 4.1-kb fragment containing the chitinase gene was found. The recombinant plasmid was analyzed to determine the essential region for chitinase activity and obtained a 2.3-kb fragment, which was sub cloned into pTrc99A using the PstI and SalI sites to construct pTrc99A/pKCHI23-3. The resulting plasmid exerted high chitinase activity upon transformation of E. coli XL1-Blue cells. Chitinase was overproduced 14 times more in the clone cells than in the wild-type cells and the enzyme was purified to homogeneity. The purified enzyme showed the similar properties as the native chitinase from T. vulgaris in terms of molecular weight and substrate specificity. The catalytic action of the cloned enzyme was an endo type, producing chitobiose as a major reaction product.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.50 no.5
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• pp.547-552
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• 2017

The viral hemorrhagic septicemia virus (VHSV) has an extensive host range, and infects farmed and wild fish inhabiting both freshwater and marine ecosystems. Enzyme-linked immunosorbent assay (ELISA) is highly useful in diagnosing viral hemorrhagic septicemia. However, ELISA shows high, non-specific background reaction with fish antibodies. In this study, we optimized the antigen and antibody concentrations used for detecting specific antibodies in VHSV-infected olive flounder to reduce non-specific binding, and improve the sensitivity of ELISA. The results suggested that OD (optical Density) values were valid when ELISA was performed with $0.1{\mu}g/well$ of virus, involving blocking with blocking buffer (Roth, Roti-Block), 1:300-1:600 dilution with flounder antisera, and 1:1000 dilution with anti-flounder IgM and HRP-conjugated goat anti-mouse IgG for detecting the VHSV antibody in flounder sera. Furthermore, 11 different VHSV strains isolated in Korea from 2012 to 2016 were used to infect the fish. The results showed no correlation between viral pathogenicity and antibody production. This research is a basic study on the application of antibody detection in the diagnosis of viral hemorrhagic septicemia in the olive flounder.

• Journal of Yeungnam Medical Science
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• v.20 no.2
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• pp.187-196
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• 2003

The cytokines are the hormone-like proteins, which are produced in the mononuclear cells. They have many roles, such as immune mediators, cell differentiations, angiogenesis. The chemokines have chemotactic effects which control the host immune response. There were few reports about the cytokines associated with musculoskeletal tumors. From late 1980s, the cytokine studies of bone tumors such as osteosarcoma were started, but most studies for benign and malignant musculoskeletal tumors were left to be explored. To evaluate the characteristics of the cytokines in variable musculoskeletal tumors, tissues were obtained from the seven patients who visited the Yeungnam University hospital from February to July 2000. They were lipoma (1 case), parosteal osteoma (1 case), enchondroma (2 cases), pigmented villonodular synovitis (1 case), ganglion (1 case), and metastaic squamous cell carcinoma (1 case). The gene experession of the cytokines were analyzed by RNase protection assay (RPA) and reverse transcription-polymerase chain reaction (RT-PCR). The lipoma and parosteal osteoma expressed MIP-$1{\beta}$, and IP-10 genes. The two enchondromas showed different results, one expressed all of MIP-$1{\alpha}$, MIP-$1{\beta}$ and IP-10 genes but the other expressed none of above. The pigmented villonodular synovitis strongly expressed MIP-$1{\alpha}$ and IP-10 when compared with the other cases. The ganglion did not express all of the chemokines mentioned above. And the metastatic squamous cell carcinoma expressed all of the chemokines and especially IP-10 was highly expressed. Even though this study has only a few cases, these results provide a basis for the cytokine mediating network study in musculoskeletal tumors.

• Korean Journal of Veterinary Research
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• v.43 no.4
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• pp.689-696
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• 2003

Canine sarcoptic mite (Sarcoptes scabiei var. canis) burrow usually in the stratum corneum of the skin of dogs and rabbits. Antigens from the burrowing mites induce cutaneous inflammatory reaction and humoral and cell-mediated immune response in the host. The effect of immunization induced by somatic antigens of house dust mite (Dermatophagoides spp.) has been evaluated to control the canine sarcoptic mite in this experiment. Twelve common antigens (187, 142, 126, 120, 109, 92, 80, 68, 51, 30, 25, 17 kDa) were found using SDS-PAGE with silver staining and Western blot between canine sarcoptic mite and house dust mite. In order to evaluate the immunologic effect of these common antigens 10 New Zealand white rabbits were divided as 4 groups such as negative control (group I), positive challenged control (group II), vaccinated (group III), and vaccinated-challenged (group IV) groups. Group II was artificially infested with about 1,000 canine sarcoptic mites and group III and IV were immunized with somatic antigens of house dust mite. In addition group IV was artificially infested with about 1,000 canine sarcoptic mites and group II, IV were treated with ivermectin. At the 8 weeks of the vaccination with common antigen, the antibody titers of all groups of II, III and IV had been increased. Both infestation score and live canine sarcoptic mite counts of group IV were lower than group III. Infestation score of group II become 0 by 2 weeks and group IV by 4 weeks after infestation. These results suggest that house dust mite, which is easy to culture in vitro, can be a vaccine candidate for protection of canine sarcoptic mite infestation.

• Asian Pacific Journal of Cancer Prevention
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• v.14 no.1
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• pp.145-148
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• 2013

Aim: Individual differences in chemosensitivity and clinical outcome of non-small-cell lung cancer (NSCLC) patients may be induced by host inherited factors. We investigated the impact of XPD Arg156Arg, XPD Asp312Asn, XPD Asp711Asp and XPD Lys751Gln gene polymorphisms on the efficacy of platinum-based chemotherapy in NSCLC patients. Methods: A total of 496 were consecutively selected from the Affiliated Hospital of Nantong University between Jan. 2003 and Nov. 2006, and all patients were followed-up until Nov. 2011. The genotyping of XPD Arg156Arg, XPD Asp312Asn, XPD Asp711Asp and XPD Lys751Gln was conducted by duplex polymerase-chain-reaction with the confronting-two-pair primer methods. Results: Individuals with XPD 312 C/T+T/T and XPD 711 C/T+T/T exhibited poor responses to chemotherapy when compared with the wild-type genotype, with adjusted ORs(95% CI) of 0.67(0.38-0.97) and 0.54(0.35-0.96), respectively. Cox regression showed the median PFS and OS of patients of XPD 312 C/T+T/T genotype and XPD 711 C/T+T/T genotype to be significantly lower than those with wild-type homozygous genotype. Conclusion: We found polymorphisms in XPD to be associated with response to platinum-based chemotherapy in NSCLC, and our findings provide information for therapeutic decisions for individualized therapy.

• Molecular & Cellular Toxicology
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• v.5 no.4
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• pp.354-363
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• 2009

Cytotoxic Nitric oxide (NO) overproduced by inducible NO Synthase (iNOS or NOS2), which was induced in inflammatory reactions and immune responses directly or indirectly affects the functions as host defense and can cause normal tissue damage. Microarray analysis was performed to identify gene profiles of both NO-dependent and -independent transcripts in RAW 264.7 macrophages that use selective NOS2 inhibitors aminoguanidine ($100\;{\mu}M$) and L-canavanine (1 mM). A total of 3,297 genes were identified that were up- or down-regulated significantly over 2-fold in lipopolysaccharide (LPS)-treated macrophages. NO-dependency was determined in the expressed total gene profiles and also within inflammatory conditions-related functional categories. Out of all the gene profiles, 1711 genes affected NO-dependently and -independently in 567 genes. In the categories of inflammatory conditions, transcripts of 16 genes (Pomp, C8a, Ifih1, Irak1, Txnrd1, Ptafr, Scube1, Cd8a, Gpx4, Ltb, Fasl, Igk-V21-9, Vac14, Mbl1, C1r and Tlr6) and 29 geneas (IL-1beta, Mpa2l, IFN activated genes and Chemokine ligands) affected NO-dependently and -independently, respectively. This NO dependency can be applied to inflammatory reaction-related functional classifications, such as cell migration, chemotaxis, cytokine, Jak/STAT signaling pathway, and MAPK signaling pathway. Our results suggest that LPS-induced gene transcripts in inflammation or infection can be classified into physiological and toxic effects by their dependency on the NOS2-mediated NO release.