• Tuberculosis and Respiratory Diseases
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• 제45권2호
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• pp.301-310
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• 1998

연구배경: 결핵성 흉막염은 면학적으로 흉강내에 국소적으로 활성화된 CD4+ T림프구와 대식세포가 관여하는 세포매개면역이 중요한 역할을 하며 이들의 상호작용은 다양한 사이토카인에 의해 좌우된다고 알려져 있다. 특히 helper T cell type 1 (Th1) 사이토카인인 IL-12 및 IFN-$\gamma$와 Th2 사이토카인인 IL-4 및 IL-10간의 균형이 세포매개반응의 정도를 결정한다고 생각되고 있다. 본 연구는 세포매개면역반응의 지표로서 Th1 사이토카인인 IL-12, IFN-$\gamma$와 이들과 길항적으로 작용한다고 알려져있는 Th2 사이토카인 중 IL-10이 결핵성 흉수내에 어떻게 표현되는지를 검사하여 대조군인 악성 흉수와 비교함으로써 결핵성 흉막염의 변역학적 기전을 이해하는데 도움이 되고자 하였으며 아울러 사이토카인의 진단적 유용성을 알아보고자 하였다. 방 법: 각 20명의 결핵성 흉막염과 악성 흉막염 환자를 대상으로 흉수와 혈장에서 IL-10, IL-12, IFN-$\gamma$를 측정하고 흉수에서의 ADA를 측정하여 비교하였다. 사이토카인은 대상환자의 혈액과 흉수를 원심분리하여 얻은 상층액을 ELISA 방법으로 측정하였고 ADA 활성도는 비색법으로 측정하였다. 결 과: 결핵성 흉막염 환자에서 흉수의 IL-10, IL-12, IFN-$\gamma$의 농도는 $121.3{\pm}83.7$ pg/mL, $571.4{\pm}472.7$ pg/mL, $420.4{\pm}285.9$ pg/mL로 혈장의 $21.2{\pm}60.9$ pg/mL, $194.5{\pm}67.6$ pg/mL, $30.1{\pm}18.3$ pg/mL 보다 모두 유의하게 높았다 (p<0.01). 악성 흉막염 환자에서 흉수의 IL-10, IL-12, IFN-$\gamma$의 농도는 $88.4{\pm}40.4$ pg/mL, $306.5{\pm}271.1$ pg/mL, $30.5{\pm}54.8$ pg/mL로 혈장의 $43.4 {\pm}67.2$ pg/mL, $206.8{\pm}160.6$ pg/mL, $14.6{\pm}3.3$ pg/mL와 비교하였을때 IL-10 만이 유의하게 높았고 (p<0.001) IL12, IFN-$\gamma$에선 유의한 차이가 없었다. 결핵성 흉막염과 악성 흉막염 환자의 흉수에서의 농도를 비교하였을 때 IL-12, IFN-$\gamma$, ADA는 결핵성 흉막염에서 유의하게 높았으나 (p=0.046, <0.001, <0.001) IL-10은 유의한 차이가 없었다. 결핵성 흉수염을 악성 흉수염과 감별하는데 있어 IL-12, IFN-$\gamma$, ADA의 기준을 각각 300 pg/mL, 100 pg/mL, 45 U/L으로 하였을때 민감도/특이도는 IL-12에서 60%/70%, IFN-$\gamma$에서 90%/85%, ADA 에서 85%/90%였다. 결 론: 결핵성 흉수에서 흉강내에 Th1 사이토카인인 IL-12, IFN-$\gamma$와 함께 IL-10이 증가되어 있었고 악성흉수와 비교했을때 IL-12, IFN-$\gamma$는 유의하게 증가되어 있었으나 IL-10은 의의가 없었다. 따라서 결핵성 흉막염의 면역기전에 Th1 경로의 세포매개변역반응이 주로 관여함을 확인할 수 있었고 국소적인 IL-10 증가의 임상적 의의는 추후의 연구가 필요할 것으로 생각된다. 또한 IFN-$\gamma$와 ADA는 결핵성 흉수와 악성 흉수와의 감별에 유용한 진단법으로 생각된다.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제32권1호
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• pp.36-41
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• 2006

Objective. The objective of this study was to examine the hypothesis that inflammatory synovial fluid from TMJ internal derangement initiates a transient increase in intracellular calcium concentration ([$Ca^{2+}$]i) in chondrocytes and the induced Ca2+ signaling affects iNOS/COX-2 gene expression patterns following exposure to inflamed synovial fluid. Materials and Methods. Two female adult patients with symptoms of TMD who agreed to participate in the study were selected for this study. Immortalized human juvenile costal chondrocyte C-28/I2 was grown to 80% confluency and synovial fluids from two patients were added respectively to culture media for 24 hours at the concentration of 100ng/10ml. Confocal laser scanning microscope (CLSM) was used to examine changes of intracellular calcium concentration ([$Ca^{2+}$]i). RT-PCR was performed to identify the expression profile of IL-1${\alpha}$, iNOS, COX-2. Results. Increased [$Ca^{2+}$]i was observed in chondrocytes subjected to inflamed synovial fluid compared to control cultures and in respective cultures exposed to inflamed synovial fluids from each patient, IL-1${\beta}$, COX-2 mRNA were detected. However, in neither case iNOS mRNA was expressed. IL-1${\alpha}$, COX-2, and iNOS mRNA were expressed in control culture. Conclusion. Our results show that immortalized chondrocytes cultured with inflamed synovial fluids from patients diagnosed as disc displacement without reduction and limitation in mouth opening showed increased calcium concentration and expression of COX-2 while inhibiting the production of iNOS, which in turn could adversely affect the chondrocytes in at least short term by hindering physiologic role of NO against inflammatory cascades. These findings suggest that inflamed synovial fluid may differentially regulate the transcriptomes of relevant inflammatory mediators, especially iNOS/COX-2 axis in chondrocytes through adjusting calcium transients.

• 대한방사선기술학회지:방사선기술과학
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• 제11권1호
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• pp.63-69
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• 1988

In case of occuring the atomic energy accidents the proper medical treatments should be necessary. As the aim of the basic data for protective actions, the present studies were carried out to evaluate the decontamination of radioiodine by the administration of the antithyroid drugs (KI, NaI) and isotonic saline. Some recommended methods of decorporating radioiodine were investigated using 450, NIH-GP mice, each injected intraperitoneally with $1{\mu}Ci$ of $NaI^{131}$ as the internal contamination and treated with 2mg/0.2ml-saline of NaI and 2.6mg/0.2ml-saline of KI as the antithyroid drugs. Accordingly, effects of antithyroid drugs for internal contamination were: 1. Administration of NaI and KI caused to rapidly excrete internal radioiodine as the antithyroid drugs and decrease in whole body retention was reduced than in the saline group. 2. After internal contamination NaI and KI were to be administered for radioprotective effects as quickly as possible. 3. Decrease in body-retention made temporary shifts with enough fluids (water), however, as far as radioprotective effects is concerned, saline was not more significant than in the other group (NaI and KI). 4. Regarding to thyroid protective effects NaI, KI and saline were significant in effectively order.

• Tuberculosis and Respiratory Diseases
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• 제57권5호
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• pp.425-433
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• 2004

연구배경 : 경구면역관용 유도는 4주 이내의 급성천식모델에서 알레르기 염증반응을 효과적으로 억제하는 것으로 알려져 있다. 하지만 경구면역관용 유도가 4주 이상 지속되는 만성천식모델에서도 알레르기 염증반응을 효과적으로 억제할 수 있는 지에 대해서는 아직 불확실하다. 본 연구에서는 8주 동안 지속되는 만성천식모델을 이용하여 경구면역관용 유도가 알레르기 염증반응 및 기도재형성에 어떤 영향을 미치는 지를 관찰하였다. 방 법 : 5주된 암컷 BALB/c 마우스에 ovalbumin(OVA)을 복강 내로 투여하여 감작시킨 후, 6주 동안 주 2회 OVA를 반복 흡입시킴으로써 만성천식모델을 만들었다. 경구면역관용은 감작시키기 전에 OVA를 경구 투여함으로써 유도하였으며, 저용량 군(OVA 1 $mg/day{\times}6$일)과 고용량 군(OVA 25 $mg/day{\times}1$일)으로 나누었다. 기도과민성은 농도별 메타콜린 흡입에 따른 enhanced pause (penh) 값의 변화로 평가하였으며, 기관지폐포세척액 내의 염증세포수를 측정하고 IL-13, IFN-${\gamma}$ 농도 및 혈청 내 OVA 특이 IgE, IgG1, IgG2a 농도를 ELISA로 측정하였다. 기도재형성 정도는 폐조직의 PAS 및 Masson's trichrome 염색으로 관찰하였다. 결 과 : 경구면역관용군은 천식군에 비해 penh 값, 기관지폐포세척액 내의 염증세포 수, IL-13 및 IFN-${\gamma}$ 농도, 혈청 내의 OVA 특이 IgE, IgG1 및 IgG2a 농도, 폐조직 술잔세포의 과다형성, 기저막하부의 섬유화 정도가 유의하게 감소되었다 (P<0.05). 결 론 : 알레르기 기관지천식모델에서 경구면역관용 유도는 8주까지 장기적으로 기도과민성, 염증반응 및 기도재 형성을 억제하였으며, 그 기전에는 항원 특이 면역글로불린과 Th1 및 Th2 시토카인들에 대한 억제작용이 중요한 역할을 하는 것으로 추측되었다.

• Tuberculosis and Respiratory Diseases
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• 제45권2호
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• pp.271-279
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• 1998

연구배경: 결핵의 유병률은 감소하는 추세이나 노인, 항암약물요법, HIV 감염 풍에 의해 면역기능이 약화된 환자에 있어서 결핵의 발생이 문제가 되고 있으며, 특히 다제내성균주의 출현은 큰 문제이다. 결핵진단법 중 체액에서 도말검사나 배양검사를 통해서 Myco-bacterium tuberculosis를 검출하는 것이 표준진단법이나, 도말검사는 상대적으로 민감도가 낮고 배양검사는 오랜시간이 소요된다. 중함연쇄반응을 이용하여 결핵균의 DNA를 검출하는 방법은 매우 민감하나 비용이 많이 소요된다. ELISA(enzyme linked immunosorbent assay)를 이용하여 혈청에서 결핵균 특이항원에 대한 항체를 검출하는 방법이 객담도말음성인 활동성 폐결핵환자를 다른 비결핵성 폐질환으로부터 감별하는데 유용한지를 확인하고자 하였다. 방 법: 연세대학교 세브란스 병원에 입원한 183명의 객담도 말음성인 폐질환환자에서 항산균에 대한 객담도말 및 배양검사와 결핵균 특이 항원인 recombinant 38 kilo-dalton 항원과 culture filtrate항원을 이용한 ELISA 검사를 시행하였다. 결 과: 35명의 활동성 폐결핵환자 중 18명에서 배양검사상 Mycobacterium tuberculosis를 검출할 수 있었다. 38 kDa와 culture filtrate에 대한 흡광도는 활동성 폐결핵환자들에서 비결핵성 폐질환자들보다 유의하게 높았다 (p<0.05). 활동성 폐결핵환자 중 객담배양양성과 음성군사이에 38 kDa와 culture filtrate에 대한 홉광도의 유의한 차이는 없었다 (p>0.05) 객담도말음성인 환자에 있어서 38 kDa과 culture filtrate의 민감도는 각각 20.0%와 31.4%였고 특이도는 각각 95.3%와 93.9%였다. 결 론: 객답도말검사 음성인 활동성 폐결핵환자에 있어서 ELISA를 이용한 38 kDa과 culture filtrate 항원에 대한 혈청항체검사법은 기존진단방법보다 낮은 민감도를 보여, 비결핵성 폐질환으로부터 활동성 폐결핵을 감별진단하는데 크게 도움이 되지 않을 것으로 여겨진다.

• 대한한방내과학회지
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• 제30권4호
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• pp.719-731
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• 2009

Objectives : Stroke is the most common disabling neurological disease of adult life. The treatment and rehabilitation of stroke patients is an important and challenging area in the field of medicine. In Korea, a lot of stroke patients are treated using oriental medicine and there have been reports on their functional recovery. The aim of this study was to prove the therapeutic effect of oriental medicine on ischemic stroke. We also tried to identify characteristics of patients whose functional recovery was prominent and studied whether or not the use of fluids, anticoagulants, antiplatelets and neuroprotective agents increased the functional recovery of patients. Methods : We studied 794 patients within 2 weeks after first attack of ischemic stroke who were admitted to Kyung-Hee Oriental Medical Center from 1999 to 2000. Their maximum admission period was 60 days. Results : Motor power grade, NIHSS and MBI scores of patients improved during hospitalization significantly. Factors affecting functional recovery were admission period, motor power grade, NIHSS and MBI at admission. Age, waist-hip ratio and HDL cholesterol also affected functional recovery of patients. Whether or not fluids, anticoagulants, antiplatelets and neuroprotective agents were administered had nothing to do with functional recovery. Conclusion : Oriental medicine is effective for treatment and rehabilitation of ischemic stroke patients. When we manage stroke, we have to consider some important factors.

• 한국유변학회:학술대회논문집
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• 한국유변학회 2006년도 춘계 학술발표회 논문집
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• pp.81-84
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• 2006

Slot coating process, in continuous and patch modes, has been applied for the many precise coating products, e.g., flat panel displays and second batteries. However, manufacturing uniform coating products is not a trivial task at high-speed operations because various flow instabilities or defects such as leaking, bubbles, ribbing, and rivulets are frequently observed in this process. It is no wonder, therefore, that many efforts to understand the various aspects of dynamics and coating windows of this process have been made both in academia and industry. In this study, as the first topic, flow dynamics within the coating bead in slot coating process has been investigated using the one-dimensional viscocapillary model by lubrication approximation and two-dimensional model by Flow-3D software. Especially, operability windows in both 1D and 2D cases with various slot die lip designs have been successfully portrayed. Also, effects of process conditions like viscosity and coating gap size on slot coating window have been analyzed. Also, some experiments to find minimum coating thickness and coating windows have been conducted using slot die coater implemented with flow visualization device, corroborating the numerical results. As the second topic, flow dynamics of both Newtonian and Non-Newtonian fluids in patch or pattern slot coating process, which is employed in manufacturing IT products such as secondary batteries, has been investigated for the purpose of optimal process designs. As a matter of fact, the flow control in this system is more difficult than in continuous case because od its transient or time-dependent nature. The internal die and die lip designs for patterned uniform coating products have been obtained by controlling flow behaviors of coating liquids issuing from slot. Numerical simulations have been performed using Fluent and Flow-3D packages. Flow behavior and pressure distribution inside the slot die has been compared with various die internal shapes and geometries. In the coating bead region, efforts to reduce irregular coating defects in head and tail parts of one patterned coating unit have been tried by changing die lip shapes. It has been concluded that optimal die internal design gas been developed, guaranteeing uniform velocity distribution of both Newtonian and shear thinning fluids at the die exit. And also optimal die lip design has been established, providing the longer uniform coating layer thickness within one coating unit.

• BMB Reports
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• 제52권6호
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• pp.373-378
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• 2019

The nucleotide-binding and oligomerization domain (NOD) is an innate pattern recognition receptor that recognizes pathogen- and damage-associated molecular patterns. The 29-kDa amino-terminal fibronectin fragment (29-kDa FN-f) is a matrix degradation product found in the synovial fluids of patients with osteoarthritis (OA). We investigated whether NOD2 was involved in 29-kDa FN-f-induced pro-catabolic gene expression in human chondrocytes. The expression of mRNA and protein was measured using quantitative real-time polymerase chain reaction (qrt-PCR) and Western blot analysis. Small interfering RNAs were used for knockdown of NOD2 and toll-like receptor 2 (TLR-2). An immunoprecipitation assay was performed to examine protein interactions. The NOD2 levels in human OA cartilage were much higher than in normal cartilage. NOD1 and NOD2 expression, as well as pro-inflammatory cytokines, including interleukin-1beta (IL-$1{\beta}$) and tumor necrosis factor-alpha (TNF-${\alpha}$), were upregulated by 29-kDa FN-f in human chondrocytes. NOD2 silencing showed that NOD2 was involved in the 29-kDa FN-f-induced expression of TLR-2. Expressions of IL-6, IL-8, matrix metalloproteinase (MMP)-1, -3, and -13 were also suppressed by TLR-2 knockdown. Furthermore, NOD2 and TLR-2 knockdown data demonstrated that both NOD2 and TLR-2 modulated the expressions of their adaptors, receptorinteracting protein 2 (RIP2) and myeloid differentiation 88, in 29-kDa FN-f-treated chondrocytes. 29-kDa FN-f enhanced the interaction of NOD2, RIP2 and transforming growth factor beta-activated kinase 1 (TAK1), an indispensable signaling intermediate in the TLR-2 signaling pathway, and activated nuclear factor-${\kappa}B$ (NF-${\kappa}B$), subsequently leading to increased expressions of pro-inflammatory cytokines and cartilage-degrading enzymes. These results demonstrate that 29-kDa FN-f modulated pro-catabolic responses via cross-regulation of NOD2 and TLR-2 signaling pathways.

• 대한한방내과학회지
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• 제42권6호
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• pp.1269-1284
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• 2021

Objectives: Phragmitis Rhizoma is the fresh or dried rhizome of Phragmites communis Trin., which has been prescribed in traditional Korean medicine to relieve fever and vomiting and to nourish the body fluids. Recently, the protective effect of Phragmitis Rhizoma extract or its components on myelotoxicity and inflammatory responses have been reported, but no study has yet been conducted on oxidative stress. Methods: The present study investigated whether an ethanol extract of Phragmitis Rhizoma (PR) could protect against cellular damage induced by oxidative stress in Chang liver cells. Results: Pretreatment with PR significantly suppressed the hydrogen peroxide (H₂O₂)-induced reduction of Chang cell viability and generation of reactive oxygen species (ROS), thereby deferring apoptosis. PR also markedly inhibited H₂O₂-induced comet tail formation and phospho-γH2AX expression, suggesting that PR protected against oxidative stress-mediated DNA damage. PR also effectively prevented the inhibition of ATP synthesis in H₂O₂-treated Chang cells by inhibiting the loss of mitochondrial membrane potential, indicating that PR maintains energy metabolism through preservation of mitochondrial function while eliminating ROS generated by H₂O₂. Immunoblotting results indicated that PR attenuated the H₂O₂-induced downregulation of Bcl-2 and upregulation of Bax expression. Conclusions: PR protects against oxidative injury in Chang liver cells by regulating energy homeostasis via ROS generation blockade, which is at least partly mediated through inactivation of the mitochondria-mediated apoptosis pathway.

• Tuberculosis and Respiratory Diseases
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• 제40권2호
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• pp.104-111
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• 1993

연구배경 : 그람 음성균의 내독소는 ARDS를 유발하는 제일 흔한 원인으로 알려져 있으며 그 기전중에 내독소에 의해서 폐로의 유입이 증가되고 활성화된 호중구에서 분비하는 산소기가 증가하여 모세혈관 내피세포등에 손상을 입히기 때문이라는 설이 유력하다. 그러한 증가된 산소기를 처리하는 항산화효소가 내독소를 대량 투여하거나 소량 반복투여시 어떻게 변화하는지 알아보고자 본 실험을 하였다. 방법 : 250~300g 되는 쥐에 내독소 대량투여군은 7mg/kg body weight로 내독소를 1회 복강내 주사하였고 소량 반복투여군은 1 mg/kg body weight로 10일간 매일 복강내 주사하였다. 대량투여군은 주사후 6, 12, 24시간후에, 소량 반복투여군은 주사후 3, 7, 10일에 각각 기관지 폐포세척술을 시행하고 살해하였다. 폐동맥을 통하여 생리 식염수를 주입하여 적혈구를 제거한후 양측 폐를 들어내고 무게를 잰후 무게의 5배되는 용량의 50 mM potassium phosphate 완충액하에 3분 간 homogenize시켰다. 이들 $4^{\circ}C$ 에서 60분간 100,000g의 속도로 원심분리하여 상충액을 $-70^{\circ}C$에 보관하였다가 Cu, Zn SOD, Mn SOD, catalase, GSH-Px와 albumin 농도를 측정하였다. 결과: 1) 폐의 wet/dry 무게비 및 기관지 폐포세척액내 albumin 농도는 내독소 대량투여후 12시간에 최고로 증가하였고 기관지 폐포세척액내 호중구는 내독소 대량투여후 6 시간에 최고로 증가하였다. 2) Cu, Zn SOD (IU/mg protein)는 대조군 ($66.7{\pm}26.3$)에 비해 대량투여군에서 6시간후 ($21.86{\pm}5.79$)와 12시간후 ($31.96{\pm}9.54$)에 각각 의의있는 감소를 나타냈으며 소량 반복투여군에서는 큰 변화가 없었다. 3) Mn SOD, catalase, GSH-Px의 양은 대량 또는 소량투여군 모두에서 특별한 변화를 관찰할 수 없었다. 결론: 내독소를 대량투여시 급성 폐부종의 소견과 함께 폐조직내 Cu, Zn SOD가 6시간 및 12시간후에 현저히 감소함을 관찰할 수 있었는데 이러한 현상은 내독소에 의해서 폐의 세포가 손상을 받은 때문으로 생각된다. 따라서 SOD를 외부에서 보충해주거나 폐내에서 합성을 증가시키는 방법으로 급성 폐손상의 진행을 막을수 있는지에 대한 연구가 진행되어야 할 것으로 사료된다.