• Journal of Microbiology
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• 제41권4호
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• pp.335-339
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• 2003

Many genetic variants of ${\alpha}_1$-antitrypsin have been associated with early onset emphysema and liver cirrhosis. However, the detailed structural basis of pathogenic ${\alpha}_1$-antitrypsin molecules is rarely known. Here we found that a recombinant $M_{malton}$ variant (Phe52-deleted) lost inhibitory activity by spontaneous conformational conversion into a more stable, inactive form under physiological conditions. Biochemical and spectroscopic data suggested that the variant converts into a reactive center loop-inserted conformation, resembling the latent form of plasminogen activator inhibitor-1.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2006년도 가을 학술발표논문집 Vol.33 No.2 (A)
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• pp.63-66
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• 2006

본 논문에서는 SNP데이터를 이용하여 간경화에 대한 감수성을 예측하기 위해 의사결정 트리를 이용하였다. 데이터는 간경화 환자와 정상환자 총 116명의 데이터를 사용하였으며, Feature 값으로는 간질환과 밀접한 연관성을 갖는 28개의 SNP데이터를 사용하였다. 실험방법은 각각의 SNP에 대하여 의사결정트리로 분류율을 측정한 후 가장 높은 분류율을 가지는 SNP부터 조합해 나가는 방식으로 C4.5 의사결정트리를 이용 leave-one-out cross validation으로 간경화와 정상을 구분하는 정확도를 측정하였다. 실험결과 간 질환 관련 SNP중 IL1RN-S130S, IRNGR2-Q64R, IL-10(-592), IL1B_S35S 4개의 SNP조합에서 65.52%의 정확도를 얻을 수 있었다.

• Asian Pacific Journal of Cancer Prevention
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• 제15권8호
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• pp.3567-3570
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• 2014

Background: Hepatocellular carcinoma (HCC) is one of the most common cancers in men and the third most common cancer in woman in Thailand. This retrospective study was designed to assess the prevalence, clinical manifestations, treatment outcomes and prognosis of HCC in the central region of Thailand. Materials and Methods: The authors retrospectively reviewed all HCC patients aged more than 15 years old in Thammasat university hospital (TUH) during the period from January 2007 to December 2012. Clinical information, biochemical tests and radiologic findings were collected from review of medical records. Results: There were 308 patients with HCC, which accounted for the prevalence of 5.19% of all cancers diagnosed in TUH during the study period. Of these, 125 (40.5%) had complete information retrievable from their medical records and met the inclusion criteria, 99 (79.2%) were males. The mean age was 57.4 years. A quarter of HCC patients in this study presented without any symptom before diagnosis. The common clinical presentations in the remaining patients were hepatomegaly 64/125 (51.2%), abdominal pain 56/125 (44.8%) and ascites 16/125 (20.8%). Cirrhosis was seen in almost all patients (92.8%). The most common causes of HCC in this study were chronic hepatitis B (49.6%) and C (19.2%). Based on Barcelona Clinic Liver Cancer staging, 75.4% presented at intermediate or late stage. Patients receiving curative therapy with either surgical treatment or radiofrequency ablation had significantly longer survival time after the HCC diagnosis than the palliative therapy group (11.0 months vs 4.0 months, p value= 0.004). The mean survival time after the HCC diagnosis was 10.5 months. Conclusions: The common causes of HCC in central region of Thailand were chronic hepatitis B and C. Surgical therapy or RFA seemed to provide better outcomes than other treatments but only in patients with early stage lesions. Most of the patients in this study presented with advanced diseases and had grave prognosis. Appropriate screening patients at risk for HCC might be an appropriate way to achieve early diagnosis and improve the treatment outcome.

• Asian Pacific Journal of Cancer Prevention
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• 제17권4호
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• pp.2145-2150
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• 2016

Background: Infection with hepatitis B virus (HBV) is a major global public health problem, with a wide spectrum of clinical manifestations. Human cytosolic glutathione-S-transferases (GSTs) include several classes such as alpha (A), mu (M), pi (P), sigma (S), zeta (Z), omega (O) and theta (T). The present study aimed to investigate the role of GST omega genes (GSTO1 and GSTO2) in different groups of patients infected with HBV. Materials and Methods: HBV groups were classified according to clinical history, serological tests and histological analysis into normal carriers (N), acute (A), chronic (CH), cirrhosis (CI) and hepatocellular carcinoma (HCC) cases. The study focused on determination of the genotypes of GST omega genes (GSTO1 and GSTO2) and GST activity and liver function tests. Results: The results showed that GSTO1 (A/A) was decreased in N, A, CH, CI and HCC groups compared to the C-group, while, GSTO1 (C/A) and GSTO1(C/C) genotypes were increased significantly in N, A, CH, CI and HCC groups. GSTO2 (A/A) was decreased in all studied groups as compared to the C-group but GSTO2(A/G) and GSTO2(G/G) genotypes were increased significantly. In addition, GST activities, albumin and TP levels were decreased in all studied groups compared to the C-group, while the activities of transaminases were increased to differing degrees. Conclusions: The results indicate that GSTO genetic polymorphisms may be considered as biomarkers for determining and predicting the progression of HBV infection.

• 한국치위생학회지
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• 제9권2호
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• pp.125-136
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• 2009

The purpose of this study was to investigate the recognition of the infection routes, symptoms and treatments of HBV by students of health-related departments so as to help students learn correct knowledge about hepatitis B and provide the basic data for establishment of oral health policies to prevent hepatitis B and improve the quality of infection management. For the subjects of this study, 666 students of health-related departments and other departments of universities in Daegu City, Gyeongbuk Province were arbitrarily chosen and given a questionnaire. Then the questionnaires collected between October 1st and 31st, 2007 were analyzed. Major findings from this study are summarized below. 1. Regarding general characteristics of the subjects, 311 were students of health-related departments and 355 were students of other departments. 55.9% of the health-related department students and 49.0% of the other department students received immunization against hepatitis. 36.0% of the health-related department students and 31.6% of the other department students had antibodies. 2. Regarding the recognition of the infection routes of HBV, the right answer "Infected through placenta" was chosen by more juniors(94.4%), sophomores(93.8%) and freshmen(74.1%) of health-related departments than other students in this order (P<0.05). The answer "Infected through sexual intercourse" was chosen by the highest percentage(75.0%) of juniors followed by freshmen(69.2%) and sophomores(31.9%) (P<0.05). 3. The percentages of health-related department students who knew that "HBV can develop into hepatic cirrhosis or liver cirrhosis were the highest among juniors(88.9%), freshmen(87.7%) and sophomores(68.8%) in this order(P<0.05). Among the other department students, the percentages of right answers to the question "Acute HBV infection shows jaundice" were the highest among juniors(75.0%), sophomores(74.8%) and freshmen(58.7%)(P<0.05).

• 대한영상의학회지
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• 제81권6호
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• pp.1517-1522
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• 2020

양측 잔류좌골동맥은 드문 선천성 혈관 기형으로 동맥류를 잘 동반하며, 이는 사례의 40~61%에서 발생한다. 본 증례는 알코올성 간경화가 있는 70세 남자에서 발생한 좌골동맥 잔존의 1예이다. 간경화와 관련된 응고 병증으로 인한 대퇴부 출혈을 평가하기 위해 시행한 컴퓨터단층사진 혈관조영술 검사에서 양측 완전 좌골동맥 잔존이 우연히 발견되었다. 환자는 선택적 좌측 잔류좌골동맥 혈관조영술에서 좌측 잔류좌골동맥의 동맥류 및 혈전성 폐색이 있어 흡인 혈전제거술로 혈전 부분 제거를 시행하였으며 심부 대퇴 동맥의 경험적 혈관조영색전술을 통해 대퇴근육 내 출혈을 성공적으로 치료하였다.

• 생명과학회지
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• 제19권10호
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• pp.1360-1367
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• 2009

간섬유화는 지속적인 간세포 손상에 대한 수복현상으로 일어나며, 급성 염증반응과 같은 손상이 주어진 후에는 간세포의 괴사 및 세포외기질의 축적이 일어나게 된다. 간섬유화에 대한 새로운 치료방법을 모색하기 위하여 본 연구에서는 간섬유화 과정에서 염증 반응과 관련된 NF-$\kappa$B와 세포외기질의 축적과 관련된 Sp1전사인자를 동시에 조절하여 간섬유화 억제효과를 관찰하고자 하였다. 전사인자인 Sp1과 NF-$\kappa$B를 동시에 억제하기 위하여 한 분자 내에 Sp1과 NF-$\kappa$B의 전사인자와 결합하는 부위를 가지는 Chimeric (Chi) decoy oligodeoxynucleotide (ODN)을 제작하였다. Chi decoy ODN은 활성화된 간성상세포에서 간섬유화 와 관련된 유전자 발현을 억제시켰으며, 섬유화 동물모델에서도 간 조직의 염증 반응 및 섬유화 관련 인자의 발현을 현저히 억제시켰다. 따라서 Chi decoy ODN은 간섬유화 및 활성화된 간성상세포의 활성을 억제할 수 있는 유전자 치료제로 고려될 수 있을 것으로 사료된다.

• 대한핵의학회지
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• 제19권2호
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• pp.81-86
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• 1985

To evaluate the significance of serum $beta_2-microglobulin$ in patients with various liver diseases, serum $\beta_2m$ levels were measured in 44 cases of normal controls, 32 cases of asymptomatic HBsAg carriers and 134 patients with various liver diseases, by radioimmunoassay using Phadebas $Beta_2-micro$ test kits. The following results were obtained: 1) The mean level of serum $\beta_2m$ was $1.39{\pm}0.25mg/l(Mean{\pm}S.D.)$ in normal controls ($1.39{\pm}0.23mg/l$ in 24 males, $1.38{\pm}0.27mg/l$ in 20 females). 2) The serum levels of $\beta_2m$ in patients with various liver diseases and asymptomatic HBsAg carriers were as follows; $1.40{\pm}0.27mg/l$ in asymptomatic HBsAg carriers, $2.42{\pm}0.37mg/l$ in 45 patients with acute viral hepatitis, $2.10{\pm}0.26mg/l$ in 46 patients with chronic persistent hepatitis, $2.60{\pm}0.34mg/l$ in 23 patients with chronic active hepatitis, and $2.60{\pm}0.49mg/l$ in 20 patients with liver cirrhosis. Serum $\beta_2m$ levels of each disease group were significantly higher than that of normal controls(p<0.001). 3) There was significant correlation between the levels of serum $\beta_2m$ and the degrees of lymphocytic infiltration in patients with chronic active hepatitis(p<0.001). 4) Significant correlations were observed between the levels of serum $beta_2-microglobulin$ and serum alanine aminotransferase(r=0.68, p<0.05) and bilirubin(r=0.63, p<0.05) in 15 patients with acute viral hepatitis. In conclusion, the serum $beta_2-microglobulin$ levels were increased in patients with various liver diseases, and it may serve as a new index of liver disease activity.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• 제23권4호
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• pp.346-355
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• 2020

Purpose: Peroxisome proliferator-activated receptor gamma (PPAR-γ) has a key role in hepatic fibrogenesis by virtue of its effect on the hepatic stellate cells (HSCs). Although many studies have shown that PPAR-γ agonists inhibit liver fibrosis, the mechanism remains largely unclear, especially regarding the cross-talk between PPAR-γ and other potent fibrogenic factors. Methods: This experimental study involved 25 male Wistar rats. Twenty rats were subjected to bile duct ligation (BDL) to induce liver fibrosis, further divided into an untreated group (BDL; n=10) and a group treated with the PPAR-γ agonist thiazolidinedione (TZD), at 14 days post-operation (BDL+TZD; n=10). The remaining 5 rats had a sham operation (sham; n=5). The effect of PPAR-γ agonist on liver fibrosis was evaluated by histopathology, protein immunohistochemistry, and mRNA expression quantitative polymerase chain reaction. Results: Histology and immunostaining showed markedly reduced collagen deposition, bile duct proliferation, and HSCs in the BDL+TZD group compared to those in the BDL group (p<0.001). Similarly, significantly lower mRNA expression of collagen α-1(I), matrix metalloproteinase-2, platelet-derived growth factor (PDGF)-B chain, and connective tissue growth factor (CTGF) were evident in the BDL+TZD group compared to those in the BDL group (p=0.0002, p<0.035, p<0.0001, and p=0.0123 respectively). Moreover, expression of the transforming growth factor beta1 (TGF-β1) was also downregulated in the BDL+TZD group (p=0.0087). Conclusion: The PPAR-γ agonist inhibits HSC activation in vivo and attenuates liver fibrosis through several fibrogenic pathways. Potent fibrogenic factors such as PDGF, CTGF, and TGF-β1 were downregulated by the PPAR-γ agonist. Targeting PPAR-γ activity may be a potential strategy to control liver fibrosis.

• 대한임상검사과학회지
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• 제50권2호
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• pp.183-189
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• 2018

에이코사펜타엔산(EPA) 및 도코사헥사엔산(DHA)을 비롯한 오메가-3 불포화 지방산은 어류 및 어유에 많이 존재한다. 최근 연구에 따르면 오메가-3 지방산이 암, 심장 혈관 질환, 면역 체계, 간경변 및 신경계 장애에 효과가 있는 것으로 나타났다. 특히, 오메가-3는 고지혈증 개선과 간기능검사에 도움을 주는 것으로 보고되고 있다. 하지만 우리나라의 경우 사례가 많지 않다. 본 연구에서는 오메가-3를 2주간 1 gm/day을 섭취하여 혈중 고지혈증과 간기능 개선에 효과가 있는지 알아보고자 하였다. 본 실험 결과, 간기능검사에서는 AST가 감소하였고, 알콜성간염이나 지방간과 관계있는 GGT에서 유의한 결과를 보였다. 오메가-3가 간기능 개선에 도움을 주는 것으로 나타났다. 심혈관질환과 관계있는 중성지방, 총콜레스테롤, 저밀도 콜레스테롤은 오메가-3 섭취후 감소를 보였고, 특히 고밀도 콜레스테롤이 유의하게 증가하였다. 고지혈 질환에서도 개선효과가 있는 것으로 나타났다. 남자군과 여자군별 오메가-3 섭취 전과 후를 비교한 결과, 남자군에서는 AST에서 유의한 결과를 보였고, 여자군에서는 GGT와 고밀도 콜레스테롤에서 유의한 결과를 보였다. 결과적으로 오메가-3 섭취가 간기능검사나 고지혈 질환의 예방 및 개선에 도움이 되는 것으로 나타났다.