• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2009년도 춘계 종합학술대회 논문집
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• pp.1136-1140
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• 2009

최근 노인인구의 증가와 평균수명의 연장으로 암 발생빈도가 증가 추세에 있고, 암환자를 위한 방사선치료가 증가되면서 장해의 인식과 중요성이 널리 알려져 있다. 본 연구에서는 미량의 선량부터 고 선량의 방사선을 마우스에 조사하여 급성장해로 나타나는 혈액세포의 변화를 비교 실험함으로 종양 치료 환자들의 조혈기계 장해를 알 수 있었다. 따라서 증감제 투여는 말초혈액 성분의 많은 장해를 초래할 수 있으므로 종양환자 치료 시 조혈기계 장해의 위험성을 고려해야 될 것으로 사료되며, 합리적인 방사선 치료가 이루어질 것으로 판단된다.

• Toxicological Research
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• 제18권4호
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• pp.375-384
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• 2002

Repeated-dose toxicity of hyrubicin ID6105, a novel anthrarycline anticancer agent, was investigated in Sprague-Dawley rats. ID6105 was injected intravenously to rats at dose levels of 0.04, 0.2 or 1.0 mg/kg/day for 4 week. As a result, there were no dose-related mortality and specific clinical signs of all animals treated with the drug. However body weight gain of both male and female rats treated with a high dose (l.0 mg/kg/day) of ID6105 significantly decreased compared to control. Interestingly, the numbers of RBC and platelets, and concentration of hemoglobin remarkably increased, while protein synthesis was suppressed, which may be related to the atrophy of spleen, thymus and liver. Moreover there were severe lymphocytic depletion in spleen and thymus as well as decrease in the number of hematopoietic cells in bone marrow. Also, degeneration of cardiac muscles and testicular germinal epithelia were observed. Taken together, it is suggested that Long-term administration of ID6105 at high doses over 0.2 mg/kg/day might cause hematopoietic and male reproductive system injuries, in addition to hepatic dysfunction.

• 종양간호연구
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• 제5권2호
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• pp.136-145
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• 2005

Purpose: To investigate the degree and relationship of the quality of life(QOL) and family burden in hematopoietic stem cell transplantation recipients(HSCTr) at admission and discharge to isolation unit. Method: Data were obtained by interviewing from 60 HSCTr and 50 of their primary caregivers' and were analyzed by SAS program. Result: The degree of quality of life in pre and post HSCTr was significantly lower in the group who had physical discomfort compared with those who had no physical discomfort. The mean score of quality of life in pre HSCTr was significantly lower compared with in post HSCTr. Objective burden of family was higher than subjective one. Conclusion: QOL in HSCTr showed lower in the group of who had medical history, physical discomfort, no hope for cure and more than 5 weeks of length of stay. On the basis of these results, it is necessary to develop nursing intervention and to apply nursing care for improving their quality of life.

• 대한소아신경학회지
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• 제24권3호
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• pp.71-83
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• 2016

X-linked adrenoleukodystrophy (X-ALD) is caused by mutations in the ATP binding cassette subfamily D member 1 (ABCD1), a gene that encodes peroxisomal membrane located on ABC half-transporter named adrenoleukodystrophy protein (ALDP). X-ALD is characterized by a highly variable clinical spectrum, including progressive cerebral type, adrenomyeloneuropathy, and addison-only phenotype. No genotype/phenotype correlation has been established. Thus, unidentified modifier genes and other co-factors are speculated to modulate the phenotypic variation and disease severity. Recent advanced sequencing methods and reprogramming technologies not only offer an affordable and applicable approach to investigate the pathophysiological mechanisms of adrenoleukodystrophy, but also provide means to develop therapy. A causal therapy of X-ALD is lacking. Lorenzo's oil therapy is recommended for asymptomatic boys, but the longest study found that the oil was not beneficial at all to symptomatic X-ALD patients. Hematopoietic stem cell therapy has a relevant chance of success when performed during this early stage of cerebral type X-ALD. Recently, it has been insisted that lentiviral-mediated gene therapy of hematopoietic stem cells can provide clinical benefits in X-ALD. This review describes current knowledge on the clinical presentation, pathogenesis, diagnosis and management of X- ALD.

• Clinical and Experimental Pediatrics
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• 제51권12호
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• pp.1336-1341
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• 2008

목 적: 본 연구의 목적은 사람의 동종 조혈모세포이식에서 공여자의 이식편과 환자의 이식 후 말초혈액에서 $CD4^+CD25^+$ T 세포 분획의 분포를 알아보고 급성 이식편대숙주병(GVHD)과 연관성을 알아보고자 하였다. 방 법: 동종 조혈모세포이식을 시행 받은 17명의 소아를 대상으로 하였다. 공여자의 이식편과 이식 받은 환자의 이식 후 말초혈액으로부터 얻은 검체를 유세포 분석(flow cytometry)하였다. 공여자의 이식편과 이식 후 1개월과 3개월에 환자의 말초혈액 내 $CD4^+CD25^+$ T 세포의 분획과 절대 세포수를 알아보았다. 결 과: 공여자의 이식편 내 $CD4^+CD25^+$ T 세포의 분획은 급성 GVHD 발생군과 비발생군에서 각각 0.90%, 1.06%이었으며 차이가 없었다(P=0.62). 이식편 내 $CD4^+CD25^+$ T세포의 절대수는 급성 GVHD 발생군과 비발생군이 각각 $6.18{\times}10^5/kg$와 $25.85{\times}10^5/kg$으로 급성 GVHD 비발생군이 발생군보다 많은 경향을 보였으나 유의성은 없었다(P=0.09). 급성 GVHD 비발생군의 말초혈액 $CD4^+CD25^+$ T 세포는 이식 후 1개월에 2.11%, 3개월에 1.43%로 유의하게 감소하였으나(P=0.028), 급성 GVHD 발생군의 말초혈액 내 $CD4^+CD25^+$ T 세포는 이식 후 1개월과 3개월에 각각 2.47%와 2.30%로 유의한 차이가 없었다(P=0.50). 결 론: 본 실험을 통하여 저자들은 공여자의 이식편 내 $CD4^+CD25^+$ T세포의 분포와 이식 후 환자의 급성 GVHD의 관계에 대한 유의성은 검증할 수 없었으며 이식 후 환자의 말초혈액 내 $CD4^+CD25^+$ T 세포에는 조절 T세포보다 GVHD와 연관된 활성화된 T세포의 분획이 더 클 것으로 사료되나 추가적인 조절 T세포의 표지자를 이용한 검증이 필요할 것으로 사료된다.

• Animal cells and systems
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• 제1권1호
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• pp.157-164
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• 1997

Ly-6E.1 antigen was proposed as a regulatory molecule of T lymphocyte activation, a hematopoietic stem cell marker, a memory cell marker, and an adhesion molecule. Though there were several reports suggesting the presence of Ly-6 ligand, the characterization of the ligand was not yet performed, As an attempt to screen the expression of Ly-6E.1 ligand, we prepared a probe for detecting Ly-6E.1 ligand by producing a fusion protein between Ly-6E.1 and $hlgC_{r1}$, A mammalian cell expression vector with Ly-6E.$1/hlgC_{r1}$ chimeric cDNA was transfected in SP2/0-Ag14 myeloma cells, and stable transfectants were selected. The fusion protein was produced as a dimer and maintained the epitopes for monoclonal antibodies specific for Ly-6E.1 and for anti-human lgG antibody. The purified fusion protein through Gammabind G column was used for FACS analyses for the expression of Ly-6E.1 ligand. The fusion protein interacted with several cell lines originating from B cells, T cells, or monocytes. The fusion Protein also strongly stained bone marrow, lymph node, and spleen cells, but thymic cells weakly, if any. The staining was more obvious in C57BL/6 $(Ly-6^b)$ than Balb/c $(Ly-6^a)$ mice. These results suggest that the interaction of Ly-6E.1 with Ly-6E.1 ligand may function both in the stem cell environment and in the activation of mature lymphocytes. The fusion protein may be a valuable tool in characterization of biochemical properties of the Ly-6E.1 ligand and, further, in isolating its cDNA.

• 한국식품영양과학회지
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• 제39권3호
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• pp.356-362
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• 2010

동결건조된 솔잎(Pinus densiflora needles)으로부터 냉수(PD-CW), 열수(PD-HW)와 메탄올추출물(PD-M)을 분획하여 in vitro에서 Peyer's patch를 경유한 장관면역 활성을 측정한 결과, PD-M 획분에서 유력한 골수세포 증식활성을 나타내었다. 메탄올 추출방법을 확립하기 위하여 MeOH 추출물을 균질화, 교반 또는 환류 등의 방법으로 조제하였을 때, 환류방법으로 조제된 MeOH 추출물에서 유의적(p<0.05)으로 가장 높은 장관면역 활성을 in vitro에서 확인할 수 있었다. 솔잎으로부터 분획된 PD-M을 마우스에 경구 투여하고 Peyer's patch를 분리하여 ex vivo에서의 장관면역 활성도 관찰하였다. 다양한 농도로 1주일 동안 PD-M을 경구투여 한 결과, 1.0 g/kg of BW/day의 용량으로 경구투여 한 C3H/He 마우스의 Peyer's patch로부터 얻은 세포배양 상등액에서 saline 대조군보다 2.5배의 높은 장관면역 활성을 보여주었다(p<0.05). 또한 다양한 농도로 경구투여 된 Peyer's patch 세포의 배양액을 이용하여 측정한 IL-6 생산능은 1.0 g/kg of BW/day의 용량에서 1.13배로 증가하였으나 GM-CSF는 처리 용량에 따라 유의적인 값을 보이지는 않았다. 이러한 결과는 PD-M의 경구투여가 Peyer's patch 세포로부터 GM-CSF와 IL-6 등의 조혈세포 증식인자의 분비를 촉진함을 나타내는 것이며, 이러한 cytokine들이 골수세포 증식의 조절인자로서 작용함을 보여주는 것으로 생각한다.

• IMMUNE NETWORK
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• 제2권3호
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• pp.166-174
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• 2002

Background: Human umbilical cord bloods, which could be taken during the delivery are utilized as a source of hematopoietic stem cells. Also in cord blood, there are several kinds of stem cells such as endothelial and mesenchymal stem cells. Methods: We isolated the mesenchymal stem cells from human umbilical cord bloods and confirmed the differentiation of these cells into osteoblast progenitor cells. The mesenchymal stem cells derived from umbilical cord blood have the ability to differentiate into specific tissue cells, which is one of characteristics of stem cells. These cells were originated from the multipolar shaped cells out of adherent cells of the umbilical cord blood mononuclear cell culture. Results: The mesenchymal stem cells expressed cell surface antigen CD13, CD90, CD102, CD105, ${\alpha}$-smooth muscle actin and cytoplasmic antigen vimentine. Having cultrued these cells in bone formation media, we observed the formation of extracellular matrix and the expression of alkaline phosphatase and of mRNA of cbfa-1, ostoecalcin and type I collagen. Conclusion: From these results we concluded that the cells isolated from the umbilical cord blood were mesenchymal stem cells, which we could differentiate into osteoblast when cultured in bone formation media. In short, it is suggested that these cells could be used as a new source of stem cells, which has the probability to alternate the embryonic stem cells.

• 한국임상수의학회지
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• 제8권1호
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• pp.1-10
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• 1991

The B-lymphocyte differentiation from committed B-cell progenitors to antibody-secreting cells was discussed. B-cell progenitors derived from hematopoietic stem cells undergo the rearrangement of immunoglobulin(Ig) gene. The earliest cells as B-cell precursors have cytoplasmic Is(${\mu}$ chain). The entire Is molecule is expressed on the surface after synthesis of L chain. The resting B cells(Go stage) stimulated by binding antigen via Ig-receptors are activated(G$_1$ stage) and followed by proliferation(S stage), coupled with further selection(affinity maturation. class switch). The production of antibody against a particular antigen depends on the activation of B cells with surface Is capable of reacting with that antigen. This process does not occur in isolation but is controlled by helper and suppressor T cells and antigen presenting cells(APC). The mechanism of T cell-dependent B-cell response for production of antibody is largely explained by the cell to cell cooperation and soluble helper factors of T cells. 1) The antigen specific B cells and helper T cells are linked by Is-receptors, leading to the delivery of helper signals to the B cells. 2) Helper T cells recognize the processed antigen-derived peptides with the MHC class II molecules(la antigen) and is stimulated to secrete B-cell proliferation and differentiation factors which activate B cells of different antigenic specificity. The two models are shown currently 1) At low antigen concentration, only the antigen-specific B cell binds antigen and presents antigen-derived peptides with la molecules to helper T cells, which are stimulated to secrete cytokines(IL-4, IL-5, etc.) and 2) At high antigen concentration, antigen-derived peptides are presented by specific B cells, by B cells that endocytose the antigens, as well as by APC Cytokines secreted from helper T cells also lead to the activation of B cells and even bystander B cells in the on- vironmment and differentiate them into antibody-secreting plasma cells.

• BMB Reports
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• 제49권2호
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• pp.93-98
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• 2016

Germline stem cells (GSCs) are the best understood adult stem cell types in the nematode Caenorhabditis elegans, and have provided an important model system for studying stem cells and their cell fate in vivo, in mammals. In this review, we propose a mechanism that controls GSCs and their cell fate through selective activation, repression and mobilization of the specific mRNAs. This mechanism is acutely controlled by known signal transduction pathways (e.g., Notch signaling and Ras-ERK MAPK signaling pathways) and P granule (analogous to mammalian germ granule)-associated mRNA regulators (FBF-1, FBF-2, GLD-1, GLD-2, GLD-3, RNP-8 and IFE-1). Importantly, all regulators are highly conserved in many multi-cellular animals. Therefore, GSCs from a simple animal may provide broad insight into vertebrate stem cells (e.g., hematopoietic stem cells) and their cell fate specification.