• Asian Pacific Journal of Cancer Prevention
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• 제13권12호
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• pp.6109-6113
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• 2012

Background: Oral cancer has become one of the most prevalent cancers worldwide and human Papillomavirus is one of the risk factors for developing oral cancer. For this study HPV18 was chosen as it is one of the high risk HPV types and may lead to carcinogenesis. However, prevalence of HPV18 infection in Oral Squamous Cell Carcinoma in Malaysia remains unclear. Objective: This study aimed to investigate the viral load of HPV18 DNA in OSCC and potentially malignant lesions using saliva samples. Materials and Methods: Genomic DNAs of thirty saliva samples of normal subjects and thirty saliva samples compromised of 16 samples from potentially malignant lesions and 14 of OSCC patients were amplified for HPV18 DNA using a nested polymerase chain reaction analysis. All PCR products were then analyzed using the Bioanalyzer to confirm presence of HPV18 DNA. Result: From thirty patients examined, only one of 30 (3.3%) cases was found to be positive for HPV18 in this study. Conclusion: The finding of this study revealed that there is a low viral detection of HPV18 in Malaysian OSCC by using saliva samples, suggesting that prevalence of HPV18 may not be important in this group of Malaysian OSCC.

• Clinical and Experimental Pediatrics
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• 제60권3호
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• pp.86-93
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• 2017

Purpose: To evaluate the clinical spectrum of posttransplantation lymphoproliferative disorder (PTLD) after solid organ transplantation (SOT) in children. Methods: We retrospectively reviewed the medical records of 18 patients with PTLD who underwent liver (LT) or kidney transplantation (KT) between January 1995 and December 2014 in Seoul National University Children's Hospital. Results: Eighteen patients (3.9% of pediatric SOTs; LT:KT, 11:7; male to female, 9:9) were diagnosed as having PTLD over the last 2 decades (4.8% for LT and 2.9% for KT). PTLD usually presented with fever or gastrointestinal symptoms in a median period of 7 months after SOT. Eight cases had malignant lesions, and all the patients except one had evidence of Epstein-Barr virus (EBV) involvement, assessed by using in situ hybridization of tumor tissue or EBV viral load quantitation of blood. Remission was achieved in all patients with reduction of immunosuppression and/or rituximab therapy or chemotherapy, although 1 patient had allograft kidney loss and another died from complications of chemotherapy. The first case of PTLD was encountered after the introduction of tacrolimus for pediatric SOT in 2003. The recent increase in PTLD incidence in KT coincided with modification of clinical practice since 2012 to increase the tacrolimus trough level. Conclusion: While the outcome was favorable in that all patients achieved complete remission, some patients still had allograft loss or mortality. To prevent PTLD and improve its outcome, monitoring for EBV infection is essential, which would lead to appropriate modification of immunosuppression and enhanced surveillance for PTLD.

• 한국산학기술학회논문지
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• 제21권5호
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• pp.337-343
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• 2020

지난 수십 년간, 소형 로봇 가운데 동물과 곤충을 모방한 생체모방 로봇은 인간이 신체적으로 접근할 수 없는 영역에서 특별한 임무를 위해 개발되어 왔다. 최근 들어, 사람의 접근이 제한되는 공간(예 : 고농축 방사능 보관지역, 바이러스 지역, 대테러 위험지역 등)이 늘어나면서 로봇의 활용범위가 더욱 다양해지고 있으며, 과거에는 사람만 가능했던 많은 행위들이 소형 로봇으로의 대체가 시도 되고 있다. 그 중에서도 보행 로봇의 최적 움직임은 이동하는 표면의 특성(예: 거칠기, 곡률, 경사, 재료 등)에 의해 결정될 수 있다. 본 연구에서는 소형 보행 로봇에 적용하기 위한 구조가 간단하고 효율적으로 구동 가능한 압전세라믹 벤더 엑츄에이터를 제안하였다. 유한요소 해석법을 활용한 동적 모델링을 통해 구동원의 형상을 최적화하여 로봇의 이동 성능을 극대화 하였고, 제작과 실험을 통하여 그 결과를 검증하였다. 제작된 엑츄에이터는 무부하 조건에서 최대속도 236mm/s로 이동 하였고, 5g의 부하를 적재하고 156mm/s의 속도로 이동 가능함을 확인 하였다. 제안된 다족형 액추에이터는 수행해야 할 임무와 요구 성능에 따라 모듈식으로 추가가 가능한 장점이 있다.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• 제15권1호
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• pp.38-43
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• 2012

Purpose: Epstein-Barr virus (EBV) hepatitis is a usually asymptomatic and self-limiting disease in immunocompetent patients. However, the range of severity is wide, and the serological diagnosis is typically difficult until the convalescent phase. Thus, we examined the value of plasma EBV DNA real-time quantitative polymerase chain reaction (RT-qPCR) in EBV hepatitis for the timely diagnosis and the relationship between EBV viral load and clinical severity. Methods: Sixty samples were confirmed as having EBV infection by RT-qPCR with the EBV BALF5 gene sequence. We examined the clinical characteristics of EBV hepatitis by reviewing medical records. Results: The median total duration of fever was 8 days (range: 0-13 days). The mean peak value of aspartate aminotransferase (AST) was $241{\pm}214$ U/L, and the mean peak value of alanine aminotransferase (ALT) was $298{\pm}312$ U/L. There was no correlation between the serum levels of liver enzyme and plasma EBV DNA titer ($p$=0.1) or between median total duration of fever and EBV DNA titer ($p$=0.056). The median age of the EBV VCA IgM-negative group was lower compared with the EBV VCA IgM-positive group in EBV hepatitis (2 years vs. 6 years, $p$=0.0009). Conclusion: The severity of EBV hepatitis does not correlate with circulating EBV DNA load according to our data. Furthermore, we suggest that plasma EBV PCR may be valuable in young infants in whom the results of serology test for EBV infection commonly are negative.

• Laboratory Medicine Online
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• 제1권1호
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• pp.26-34
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• 2011

배경: 신종 인플루엔자 A (H1N1)의 검사실 진단은 환자관리와 유행대책 수립에 매우 중요하다. 연구자들은 확진을 위해서 실시간 중합효소연쇄반응검사와 바이러스 감염질환의 표준검사로 사용되어 왔던 배양검사를 신속항원검사와 함께 비교하였다. 방법: 2009년 12월부터 2010년 1월에 걸쳐 얻어진 총 861예의 호흡기 검체를 이용하여 신속항원검사, R-mix 신속배양검사, 실시간 중합효소연쇄반응검사를 동시에 시행하여 그 성적을 구하였고, 배양결과 등급과 실시간 중합효소연쇄반응검사의 cycle threshold(Ct)값에 따른 신속항원검사 결과와의 관계를 조사하였다. 결과: 861명 중 308명(35.8%)이 신종 인플루엔자 A (H1N1)로 확진되었고, 이용된 검사들의 민감도, 특이도, 양성예측치, 음성예측치는 신속항원검사가 59.7%, 99.5%, 98.4%, 81.6%, R-mix 배양검사가 93.2%, 100%, 100%, 96.3%, 실시간 중합효소연쇄반응검사가 95.8%, 100%, 100%, 97.7%였다. 신속항원검사의 양성률은 배양이 약양성인 경우는 25.3%, 실시간 중합효소연쇄반응검사의 Ct값이 30-37인 경우에는 2.3%로 매우 낮았다. 신종 인플루엔자 확진환자 중 입원율은 3.2%였고, 사망률은 0.3%였고, 위장관 증상은 7.2%에서 관찰되었다. 결론: R-mix 배양검사와 실시간 중합효소연쇄반응검사는 신종 인플루엔자의 진단에 매우 좋은 성적을 보였으며, 특히 낮은 농도의 바이러스 검체에서 유용한 검사였다.

• Childhood Kidney Diseases
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• 제19권2호
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• pp.176-179
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• 2015

Rituximab (RTX), a monoclonal antibody against the B-cell marker CD20, is commonly used as a treatment for antibody-mediated diseases or B-lymphocyte-mediated diseases. Destruction of B cells may reverse the disease course in many conditions; however, patients who are treated with RTX cannot respond appropriately to de novo infection due to lack of B lymphocytes. Here, we report one such case. A 7-year-old renal allograft recipient presented with severe anemia due to parvovirus infection after RTX treatment. The patient had focal segmental glomerulosclerosis and had received cadaveric kidney transplantation 6 months previously. She was treated with high-dose steroid for acute rejection and RTX for Epstein Barr Virus infection 3 months previously. At presentation, her hemoglobin level was 5.4 g/dL and leukocyte and platelet counts were normal. She had microcytic normochromic anemia and high viral load of parvovirus B19(70,578 copies/mL). Intravenous immunoglobulin ($200mg/kg{\cdot}d$) treatment controlled the progression of anemia and parvovirus infection. De novo parvovirus infection during the B lymphocyte-depletion period may have precipitated the severe anemia in this case. Close monitoring of infection is required after RTX therapy.

• Childhood Kidney Diseases
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• 제15권1호
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• pp.76-80
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• 2011

Cytomegalovirus (CMV)는 신 이식 후 발생하는 감염의 가장 흔한 원인으로, 예방요법과 새로운항 바이러스 제제의 도입에도 불구하고 심각한 결과를 초래하며, 거부반응을 촉진한다는 의견도 제시되고 있다. 저자들은 이식 전 CMV 양성이었던 환아에서 후기 CMV 질환이 발병한 증례를 보고하고자 한다. 이식 6개월 후 mycophenolate mofetil ((MMF)을 투여한 후로 설사와 복통을 호소하던 환아는 이식 후 8개월에 소장이 파열되었다. 환아는 6주간의 치료후에 호전되었다. CMV감염의 위험 인자로 MMF의 역할에 대해서는 더 논의가 필요하나, MMF 투여 시이식 후 바이러스 감염에 대한 주의와 주기적인 추적 관찰이 필요하다.

• Journal of Ginseng Research
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• 제28권4호
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• pp.173-182
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• 2004

We have shown that long-term intake of Korean red ginseng (KRG) delays disease progression in HIV-I infected patients. In the present study to investigate whether this slow progression was associated with protective human leukocyte antigen (HLA) alleles as well as with KRG-intake, we have performed clinical analysis of 31 HIV-1 infected patients who have been living for more than 10 years without any antiretroviral therapy. Average amount of KRG-intake over $130\;{\pm}16$ months was $4,797\;{\pm}4,921\;g$ and the annual decrease in CD4 T cell (AD) was $30\;{\pm}29{\mu}L$. We observed significant correlations among amount of KRG-intake, AD(r=-0.53, P < 0.01), and plasma HIV-1 RNA copy (r=-0.35, P < 0.05), along with a significant correlation between KRG-intake and HLA score AD(r=-0.49, P < 0.01), whereas there was no significant correlation between HLA score and AD or viral load. When the 31 patients were divided into 2 groups based on the amount of KRG-intake, the $AD(14/{\mu}L)$ in the 16 patients who had taken higher amounts of KRG was significantly less than that $(49/{\mu}L)$ in the 15 patients with a little or no KRG-intake (P < 0.01). These data indicate that KRG-intake sig­nificantly slows CD4 T cell depletion in HIV-1 infected patients.

• 식품보건융합연구
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• 제6권4호
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• pp.17-19
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• 2020

HIV/AIDS disease still remain a global pandemic and it's management has undergone series of treatment changes and improvement although there is still no permanent cure.Dolutegravir belongs to a group of HIV drugs called integrase inhibitors. Integrase inhibitors block an HIV enzyme called integrase. By blocking integrase, integrase inhibitors prevent HIV from multiplying and can reduce the amount of HIV in the body.Dolutegravir combination based regimen has turned out to be very effective (antiviral) with negligible rare side effects on clients. This drug (Dolutegravir based regimen) combination has successfully increased the appetite for food of all the clients, unlike others and has shown to reduce viral load in the most shortest period ever. It can be deduced that development of resistant mutant virus will be reduced if not eliminated with dolutogravir based regimen.The role of Continuous adherence counseling has shown to improve clients treatment management. It is important to note that the availability of food has direct effect on the economic status or financial weight on the client. Hence the progress that is increase in body mass index (BMI) is a direct impact of the availability of food for the clients.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• 제12권2호
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• pp.199-206
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• 2009

목 적: 간 이식 소아에서 발생한 PTLD의 경험을 통해 발현 양상, 발병 위험 인자, 진단 방법, 치료 및 예후에 영향을 줄 수 있는 요인들을 알아보았다. 방 법: 1988년 1월부터 2009년 6월까지 서울대학교 어린이병원에서 간 이식을 받은 소아 148명 중 PTLD로 진단된 8명의 환아들을 대상으로 후향적 분석을 하였다. 이식당시 나이, 이식 후 PTLD 증상이 나타날 때 까지의 기간, 임상적 증상, 조직학적 소견, EBV 검사 결과, 치료 및 경과에 대해 조사하였다. 결 과: 간 이식 후 PTLD의 유병률은 5.4%였고, 발생시기는 조기 PTLD가 6명(75%), 후기 PTLD가 2명(25%)이었다. 대상 환아의 간 이식 당시 나이는 평균8.1${\pm}$4.4개월로, 12개월 미만이 7명(87.5%), 12개월 이후가 1명(12.5%)이었다. PTLD 진단 시 주증상은 발열, 설사, 혈변이었고 모두 장이나 장간막 림프절 침범이 있었다. 3명은 개복 수술로 5명은 상부 위장관 내시경이나 대장 내시경을 통한 조직 검사로 진단되었다. 조직학적 진단은 early lesion이 3명, polymorphic PTLD 2명, monomorphic PTLD 1명, Burkitt 림프종 1명, B 세포 림프종이 1명이었다. EBV는 7명에서 양성을 보였다. 치료는 전례에서 1차 치료로 면역억제제를 중지하고 항바이러스제(ganciclovir)를 투여 하였다. 4명의 환아들에서 rituximab을 추가하였고 Burkitt 림프종과 B 세포림프종으로 진단된 환아들은 각각 항암 치료를 병행하였다. B 세포 림프종으로 진단되어 치료 중에 패혈증으로 1명이 사망하였으며 나머지 7명은 호전되었다. 결 론: 1세 미만에 간 이식을 받은 경우가 PTLD 발생의 주요한 위험 인자였으며, EBV viral load의 지속적인 감시와 위장관 내시경을 통한 조직 검사가 PTLD 조기진단에 유용할 것으로 생각한다.