• Archives of Pharmacal Research
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• 제22권4호
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• pp.354-360
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• 1999

Inflammatory bowel disease (IBD) is a multifactorial disorder with unknown etiology and pathogenesis. DA-6034,$ 7-carboxymethyloxy-3^{l}, 4^{l},$ 5-trimethoxy flavone, is a synthetic flavonoid known to possess anti-inflammatory activity. This study was performed to evaluate the oral therapeutic effect of DA-6034 in three experimental animal models of IBD : two chemical-induced IBD models of rats and the human leukocyte antigen (HLA)-B27 transgenic rat model known to develop spontaneous colitis without the use of exogenous agents. Acute chemical colitis was induced by intracolonic instillation of 1.2 ml of 4% acetic acid solution. Prednisolone (1 mg/kg), sulfasalazine (100 mg/kg) and DA-6034 (0.3~3 mg/kg) were orally administered twice daily for 6 days in these rats. In addition, chronic chemical colitis was induced by intracolonic administration of trinitrobenzene sulfonic acid (TNBS) 30 mg in 50% ethanol and agents were orally administered for 6 or 20 days. In chemical-induced IBD models, all of these agents reduced the severity of colitis and specially, DA-6034 (3 mg/kg) showed more potent effect than other drugs in macroscopic lesion score. In HLA-B27 transgenic rats, DA-6034 (3 mg/kg) and prednisolone (0.5 gm/kg) were treated orally twice daily for 6 weeks. The HLA-B27 transgenic rats showed only mild colitis, compared with the chemical-induced colitis models. DA-6034 ameliorated the loose stool and decreased microscopic damage, which is the important indicator of this model. In conclusion, oral therapy of DA-6034 attenuated the macroscopic and histologic damages of the colon in all three experimental models of IBD, which suggest that DA-6034 could be a promising drug in the treatment of IBD.

• Advances in Traditional Medicine
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• 제5권4호
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• pp.251-261
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• 2005

Rheumatoid arthritis (RA) is an autoimmune/inflammatory disorder with a complex genetic component. RA is characterized by chronic inflammation of the synovial membrane in the joint, which leads to the progressive destruction of articular cartilage, ligament and bone. Several cytokines such as tumor necrosis $factor-{\alpha}\;TNF-{\alpha}\;and\;interleukin-1{\beta}\;(IL-1{\beta})$ and interleukin-6 (IL-6) have been implicated in the pathological mechanisms of synovial tissue proliferation, joint destruction and programmed cell death in rheumatoid joint. Genome wide screening of subjects suffering from autoimmune diseases especially arthritis revealed linkage to inflammatory molecules like $TNF-{\alpha},\;IL-1{\beta}$ and IL-6, inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2), nuclear factor-kappaB $(NF-{\kappa}B)$ and human leucocyte antigen/major histocompatibility complex (HLA/MHC) locus. The status of the pharmacological mechanism of herbal drugs in the light of genome wide screening results has been discussed to reinforce the therapeutic potential and the pharmacological basis of the herbal drugs.

• Asian Pacific Journal of Cancer Prevention
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• 제15권20호
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• pp.8947-8950
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• 2014

Immunological functions of heat shock proteins (HSPs) have long been recognized. In this study we aimed to efficiently purify HSP70 from renal cell carcinoma and test it as a tumor antigen for pulsing dendritic cells in vitro. HSP70 was purified from renal cell carcinoma specimens by serial column chromatography on Con A-sepharose, PD-10, ADP-agarose and DEAE-cellulose, and finally subjected to fast protein liquid chromatography (FPLC). Dendritic cells derived from the adherent fraction of peripheral blood mononuclear cells were cultured in the presence of IL-4 and GM-CSF and exposed to tumor HSP70. After 24 hours, dendritic cells were phenotypically characterized by flow cytometry. T cells obtained from the non-adherent fraction of peripheral blood mononuclear cells were then co-cultured with HSP70-pulsed dendritic cells and after 3 days T cell cytotoxicity towards primary cultured renal cell carcinoma cells was examined by Cell Counting Kit-8 assay. Dendritic cells pulsed in vitro with tumor-derived HSP70 expressed higher levels of CD83, CD80, CD86 and HLA-DR maturation markers than those pulsed with tumor cell lysate and comparable to that of dendritic cells pulsed with tumor cell lysate plus TNF-${\alpha}$. Concomitantly, cytotoxic T-lymphocytes induced by HSP70-pulsed dendritic cells presented the highest cytotoxic activity. There were no significant differences when using homologous or autologous HSP70 as the tumor antigen. HSP70 can be efficiently purified by chromatography and induces in vitro dendritic cell maturation in the absence of TNF-${\alpha}$. Conspecific HSP70 may effectively be used as a tumor antigen to pulse dendritic cells in vitro.

• Tuberculosis and Respiratory Diseases
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• 제69권6호
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• pp.456-464
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• 2010

Background: Synergistic antitumor effects of the combined chemoimmunotherapy based on dendritic cells have been reported recently. The aim of this study is to search new applicability of gefitinib into the combination treatment through the confirmation of gefitinib effects on the monocyte derived dendritic cells (moDCs); most potent antigen presenting cell (APC). Methods: Immature and mature monocyte-derived dendritic cell (im, mMoDC)s were generated from peripheral blood monocyte (PBMC) in Opti-MEM culture medium supplemented with IL-4, GM-CSF and cocktail, consisting of TNF-${\alpha}$ (10 ng/mL), IL-$1{\beta}$ (10 ng/mL), IL-6 (1,000 U/mL) and $PGE_2$ ($1{\mu}/mL$). Various concentrations of gefitinib also added on day 6 to see the influence on immature and mature MoDCs. Immunophenotyping of DCs under the gefitinib was performed by using monoclonal antibodies (CD14, CD80, CD83, CD86, HLA-ABC, HLA-DR). Supernatant IL-12 production and apoptosis of DCs was evaluated. And MLR assay with $[^3H]$-thymidine uptake assay was done. Results: Expression of CD83, MHC I were decreased in mMoDCs and MHC I was decreased in imMoDCs under gefitinib. IL-12 production from mMoDCs was decreased under $10{\mu}M$ of gefitinib sinificantly. Differences of T cell proliferation capacity were not observed in each concentration of geftinib. Conclusion: In spite of decreased expressions of some dendritic cell surface molecules and IL-12 production under $10{\mu}M$ of gefitinib, significant negative influences of gefitinib in antigen presenting capacity and T cell stimulation were not observed.

• IMMUNE NETWORK
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• 제13권4호
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• pp.116-122
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• 2013

This study was conducted to determine whether CD4 T cell responses to citrullinated fibrinogen occur in patients with rheumatoid arthritis (RA), especially in HLA-DR4-positive subjects. Whole peripheral blood mononuclear cells (PBMCs) of RA patients and control subjects were stimulated with citrullinated fibrinogen peptides, and T-cell production of proliferation and proinflammatory cytokines, such as interferon-${\gamma}$(IFN-${\gamma}$) and interleukin-17A (IL-17A), were measured. In addition, CD4 T cells from RA patients were stimulated with the citrullinated fibrinogen peptide, $Fib-{\alpha}$ R84Cit, identified as a DRB1*0401-restricted T cell epitope in HLA-DR4 transgenic mice, and the degree of T cell activation was examined similarly. No proliferative responses to the citrullinated fibrinogen peptides were observed in whole PBMCs or CD4 T cells from RA patients. Furthermore, no increased production of IFN-${\gamma}$ or IL-17A was found in whole PBMCs or CD4 T cells stimulated with the citrullinated fibrinogen peptides, although these cells responded to recall antigen, a mixture of tetanus toxoid, purified protein derivative (PPD) from Mycobacterium tuberculosis, and Candida albicans. The results of this study indicate that anti-citrulline immunity in RA patients may be mediated by fibrinogen because there is no evidence of CD4 T cell-mediated immune responses to citrullinated fibrinogen peptides.

• Imaging Science in Dentistry
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• 제30권3호
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• pp.217-222
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• 2000

A 31-year-old male with the complaint of severe limitation of mouth opening was referred to our department of Chonbuk National University Hospital. The physical status of the patient was hyposthenic. Extraoral examination showed no condylar movement of the both temporomandibular joints, no pain, no facial swelling or paresthesia. Intraoral examination showed several cervical caries on the upper anterior teeth, and gingival swelling on the whole dentition. Transcranial view showed no condylar movement, and narrowing of joint spaces. Chest P-A view showed straightening of thoracic, lumbar spine, and squaring of vertebrae of the same spines. Conventional lateral radiograph of cervical spine showed calcification of the intervertebral ligament. Computed tomograph showed extensive bone formation between temporal bone and the condylar head at both sides. Laboratory findings showed positive reaction on HLA-B27 histocompatibility antigen and increased level of IgA, IgG, ESR. Based on the clinical, radiographic, and the laboratary findings, final diagnosis was made as bony ankylosis of the both temporomandibular joints secondary to ankylosing spondylitis.

• 대한수의학회지
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• 제35권2호
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• pp.307-315
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• 1995

The characterization of the MHC of domestic animals may constitute a first step towards increasing the efficiency of food production through improved disease resistance. In order to study the role of the MHC in regulating immune response it is first necessary to identify the different MHC alleles. In this research we try to investigate the possible associations between BoLA of Korean native cattles and infectious cattle disease. For this purpose we used one approach, serology. The results were summarized as follows : 1. Korean native cattle's lymphocyte reacted with alloantisera which recognized seven official BoLA allele. Korean native cattle's lymphocytes were reacted same as European breeds(especially with 673/3(W20)). 2. Korean native cattle's lymphocytes reacted with alloantisera 773/2, 673/3, 638/3, 773/3, 602/2, 639/2 and 639/3 at high reaction frequency. But alloantisera 642/1 was not expressed on Korean native cattle. If this allele, recognized by alloantisera(642/1), officially certificate In BoLA workshop it will be characterization factor of Korean native cattle. 3. According to cellular similarity index, we can presume on genetic relativity which has no family relationship.

• 한국발생생물학회지:발생과생식
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• 제23권2호
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• pp.79-92
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• 2019

Humanized mice, containing engrafted human cells and tissues, are emerging as an important in vivo platform for studying human diseases. Since the development of Nod scid gamma (NSG) mice bearing mutations in the IL-2 receptor gamma chain, many investigators have used NSG mice engrafted with human hematopoietic stem cells (HSCs) to generate functional human immune systems in vivo, results in high efficacy of human cell engraftment. The development of NSG mice has allowed significant advances to be made in studies on several human diseases, including cancer and graft-versus-host-disease (GVHD), and in regenerative medicine. Based on the human HSC transplantation, organ transplantation including thymus and liver in the renal capsule has been performed. Also, immune reconstruction of cells, of the lymphoid as well as myeloid lineages, has been partly accomplished. However, crosstalk between pluripotent stem cell derived therapeutic cells with human leukocyte antigen (HLA) mis/matched types and immune CD3 T cells have not been fully addressed. To overcome this hurdle, human major histocompatibility complex (MHC) molecules, not mouse MHC molecules, are required to generate functional T cells in a humanized mouse model. Here, we briefly summarize characteristics of the humanized mouse model, focusing on development of CD3 T cells with MHC molecules. We also highlight the necessity of the humanized mouse model for the treatment of various human diseases.

• Clinical and Experimental Pediatrics
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• 제48권2호
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• pp.178-185
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• 2005

목 적 : JMML은 소아에서 발생하는 매우 드문 종류의 백혈병으로서 통상적인 항암화학요법만으로는 완치가 어려워 동종 조혈 모세포 이식을 시행하여야 한다. 아직 국내에서는 본 질환의 조혈 모세포 이식 성적에 대한 보고가 없어 저자들은 단일기관에서 경험한 JMML 환자의 동종 조혈 모세포 이식 성적을 보고하고자 하였다. 방 법 : 8개월에서 39개월 된 11명의 JMML 환자를 대상으로 동종 조혈 모세포 이식을 시행하였다. 조혈 모세포의 공급원으로 비혈연 골수 혹은 제대혈 7례, HLA 일치 형제 공여자 3례, HLA 1 항원 불일치 가족 공여자 1례 등을 이용하였다. 모든 환자들은 이식 전 항암화학요법을 시행 받았고 일부 환자에게는 13-cis-retinoic acid(CRA)를 사용하였다. 결 과 : 총 11례 중 3례만이 이식 전 치료로 혈액학적 및 임상적 완전관해에 도달하였다. 이식 후 1개월째 첫 키메리즘 평가 결과 완전 공여자 키메리즘 5례, 혼합 키메리즘 5례, 자가회복 1례였다. 혼합 키메리즘 상태에서 비장종대가 해소되지 않았던 1례에서 면역억제제의 급속 감량과 함께 CRA를 지속적으로 투여한 결과 완전 공여자 키메리즘으로의 전환과 함께 완전관해가 유도되었다. 자가회복 되었던 1례는 이식 후 조기 재발하였으나 복합 항암화학요법과 CRA의 투여로 이차 완전관해가 유도되었다. 결과적으로 11례 중 6례가 이식 후 정중 추적기간 15.5개월간 무사건 생존 중이다. 사망한 3례는 모두 완전 공여자 키메리즘에 실패하였던 경우들로서 질병의 재발 혹은 진행이 사망의 원인이었다. 결 론 : 본 연구 결과 JMML의 근치에는 동종 조혈 모세포 이식 후 이식편대 백혈병 효과가 중요한 역할을 담당하며 CRA도 긍정적 역할을 가지는 것으로 사료된다. 이식 후에도 완전관해에 도달하지 못하고 혼합 키메리즘 양상을 보이는 경우, 면역 억제제를 조기 감량하는 정책과 함께 CRA를 도입함으로써 완치의 가능성을 높일 수 있을 것으로 기대된다.

• Journal of Periodontal and Implant Science
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• 제29권2호
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• pp.333-350
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• 1999

The modulation of leukocyte cell surface adhesion molecules may influence the development of cellular events that determine the course of the inflammatory process. Direct interaction between activated T cells and monocytes resulted in a large production of $IL-1{\beta}$ by monocytes. In this reactions, adhesion molecules play an important part, yet the role of them in Tmonocytes interaction remain unclear. This study was undertaken in an effort to elucidate, 1) the influence of 1.25(OH)$_2D_3-induced$ differentiation on the monocyte responsiveness to direct contact with T lymphocytes, and 2) the role of adhesion molecules on the T-monocyte direct interaction. Initially, I observed that direct contact of monocyte cell line THP-1 with stimulated fixed T cell line HuT78 markedly induces IL-1${\beta}$ production by THP-1. $IL-1{\beta}$ production was higher when THP-1 had been previously exposed to 1.25(OH)$_2D_3$ as compared to control, with ${\alpha}$- 1.25(OH)$_2D_3$ dose-dependent and exposure time-dependent manner. It was shown that 1.25(OH)$_2D_3$ also increased the expression of ${\beta}_2$ integrin adhesion receptor Mac-1(CD11b/CD18) dose- and timedependently, but did not increase the expression of human leukocyte antigen- D(HLA-D) and intercellular adhesion molecule-1(ICAM-1). The $IL-1{\beta}$ producing activity of THP-1 cells correlated well with the ability to induce the Mac-1 expression on THP-1 surface. Monoclonal antibody raised against relevant cell surface glycoproteins on THP-1 were tested for their ability to block the response of THP-1 to T cells. Antibody to Mac-1 only partially blocked $IL-1{\beta}$ production by THP-1, whereas antibodies to ICAM-1 and HLA-D did not. These data indicate that regulation of Mac-1 expression on THP-1 cells can alter the responsiveness of these cells to contact by activated T cells, however other unknown structures on the THP-1 cells may be involved in this process also.