• 대한한방내과학회지
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• 제36권4호
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• pp.470-477
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• 2015

Objectives: Given current vaccinations against the hepatitis B virus and changes in dietary lifestyles, the status of liver disorders, especially in the younger population, is different than it was in the past. This study aimed to discover the prevalence of the HBsAg positive and abnormal hepatic enzyme among college students.Methods: The study analyzed the medical examinations of 2,646 college students that were performed at Semyung University from March to September 2013.Results: A total of 11 out of 2,646 students (0.4%) showed as positive for the hepatitis B antigen, while 23.8% of students had the serum HBs antibody. A total of 212 students (8.0%) showed abnormally elevated serum levels of ALT, with significant differences between men and women. The prevalence of the abnormal serum ALT and its average value significantly increased according to an increase of BMI score, especially in male students.Conclusions: This study showed the importance of obesity as a causative factor in liver disorders, especially in the young generation. This finding will be useful for the development of therapeutics using Korean medicine in the future.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• 제10권2호
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• pp.166-172
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• 2007

목 적: 최근 HBsAb 및 HBcAb 양성인 공여자의 간이 식편을 이식 받은 수혜자에서 신생 B형 간염이 발생하는 것이 보고 되고 있으며, 저자들도 약 40%에서 신생B형 간염이 발생하는 것을 보고하였다. 한국인에서의 HBcAb 양성률은 50%가 넘는 것으로 보고하고 있는데, 이는 임상 간이식의 걸림돌이 될 수 있으며 저자들은 이를 예방하기 위한 일환으로써 본 연구를 시행하였다. 방 법: 1997년 11월부터 1998년 11월까지 12개월 동안 서울 아산병원에서 생체 간이식 공여자가 과거 B형간염과 C형 간염 감염의 증거가 없으면서 HBsAg 음성이면서 HBsAb 양성, HBcAb 양성인 성인 공여자 6명을 대상으로 하였다. 간이식 수술 시 동결 생검을 위하여 채취한 절편의 일부를 보관하여 실험에 사용하였다. 동결 절편 조직에서 DNA를 분리하여, HBV DNA의 표면 구역과 핵심 구역에 대한 시발체를 이용하여 이중 중합효소 연쇄 반응을 시행하여 검사를 시행하였다. 결 과: 공여자 6명의 조직에서 표면 구역이 모두 양성으로 관찰되었으며, 핵심 구역은 4명에서 양성으로 관찰되었다. 그 중 4명의 간을 이식받은 소아 수혜자는 모두 예방법을 시행하면서, 신생 B형 간염의 발생은 관찰되지 않고 있다. 결 론: 본 결과는 간이식 후 발생하는 신생 B형 간염의 원인으로 HBcAb 양성이 위험 인자임을 지지하고 있다. HBcAb 양성 공여자의 간이식편에서 핵심구역은 66%에서 양성으로 보여 이식 후 잠재 HBV 감염 혹은 신생 B형 간염의 발생을 막기 위해 예방적 치료가 필요할 것으로 사료된다.

• 대한핵의학회:학술대회논문집
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• 대한핵의학회 1999년도 제38차 추계학술대회
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• pp.26.2-26.2
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• 1999

• Biomolecules & Therapeutics
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• 제9권1호
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• pp.55-62
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• 2001

CJC-50100 is a recombinant hepatitis B virus surface antigen (HBsAg) expressed in yeast. The general pharmacological properties of CJC-50100 were evaluated in mice, rats, dogs and isolated guinea pig ileum. The doses were 0.33~33.3 $\mu$g/kg i.m. for mice and rats and 3.3~9.9 $\mu$g/kg i.v. for dogs. The concentrations of 0.002~0.02 $\mu$g/ml were used for the assay with guinea pig ileum. Intramuscular administration of CJC-50100 at the doses did not alter general behavior and the responses for central nervous system, smooth muscle, gastrointestinal system, cardiovascular and respiratory system, and water and electrolytes excretion. In summary, CJC-50100 had no pharmacological effect in these studies even up to the 100-fold of the expected clinical dose, 20 $\mu$g/man/60 kg.

• Clinical and Experimental Pediatrics
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• 제51권7호
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• pp.696-703
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• 2008

Korea is now classified as an area of intermediate endemicity for hepatitis B virus (HBV), due to the implementation of universal HBV vaccination and national preventive programs for HBV infection. A national program of HBV vaccination was launched in Korea in 1988 for school-going children and was listed on a vaccination guideline in 1991. In 1995, universal vaccination for newborn infants was started for the prevention of perinatal HBV transmission. The prevalence of HBsAg among Korean middle school students has shown marked decreased from 3.2% in the late 1990s to 0.44% in 2007. HBsAg positivity in preschool children was 0.9% in 1995, decreased to 0.2% in 2007 by national prevention program of hepatitis B vertical transmission, launched in 2002. Vaccine failure rate of HBV immunoprophylaxis is 4.2% by this program. The infected children should be monitored per 6-12 months interval. Lamivudine and interferon are approved therapies for children with chronic hepatitis B in immune-clearance phase in Korea.

• Biomolecules & Therapeutics
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• 제7권2호
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• pp.133-137
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• 1999

This study was undertaken to test for anti-Hepatitis B virus (HBV) activity of the aqueous extracts prepared from Eugenia caryophyllate, Ephedra sinica, Cinnamomum cassia. Aqueous extracts were assayed for the inhibition of HBV replication by measurement of HBV DNA and surface antigen (HBsAg) levels in the extracellular medium of HePG2 2.2.15 cells. All extracts decreased the levels of extracellular HBV virion DNA at concentrations ranging from 128 to 256 $\mu$g/ml and inhibited the production of HBsAg dose-dependently. Our findings suggest that these three hebal medicinal plants may have potential to develop as specific anti-HBV drugs in the future.

• KSBB Journal
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• 제5권4호
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• pp.365-371
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• 1990

To improve the growth of mouse hybridoma 2c3.1 secreting anti-Hepatitis B surface antigen monoclonal antibody (anti-HBsAg MAb), we had constructed an enriched medium and observed the effects of fetal bovine serum and serum-free supplements including human serum albumin, 'insulin and transferrin', and monoethanolamine. For further enhancement of growth, the concentrations of two major energy sources, glucose and glutamine, were strengthened with various ratios in the enriched medium. Maximum cell growth and monoclonal antibody production obtained in various ratios of glucose/glutamine with an inoculation concentration of 2$\times$105 cells/ml were 0.73$\times$106-4.62$\times$106 cells/ml and 65.1-422.6 $\mu\textrm{g}$/ml, respectively. Glutamine was round to be a major energy source and a limiting nutrient in comparison to glucose for 2c3.1 cell cultivation in enriched media with low serum.

• 약학회지
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• 제43권4호
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• pp.458-463
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• 1999

This study was undertaken to test for antiviral activity of the aqueous extracts prepared from 4 medicinal plants of Korea (Terminalia chebula, Sanguisorba officinalia, Rubus coreanus, Rheum palmatum). Aqueous extracts were assayed for the inhibition of hepatitis B virus (HBV) replication by measurement of HBV DNA and surface antigen (HBsAg) levels in the extracellular medium of HepG2 2.2.15 cells. All extracts decreased the levels of extracellular HBV virion DNA at concentrations ranging from 64 to $128{\;}\mu\textrm{g}/ml$ and inhibited the production of HBsAg dose-dependently. Among the 4 tested plants, Terminalia chebula exhibits the most prominent anti-HBV activities. Our findings suggest that these 4 medicinal plants may have potential to develop as specific anti-HBV drugs in the future.

• KSBB Journal
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• 제10권5호
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• pp.482-490
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• 1995

The relationship between pressure drop and liquid flow rate, for an axial and a radial flow chromatographic column packed with compressible porous media was theoretically analyzed using modified Kozeny-Carman equation. The results were compared with experimental observations obtained using compressible DEAE-agarose as a model medium. At 2-9 psi range studied, the theoretical derivation accounting for 'gel compression' effect predicted simple Langmuirian type response of volumetric flow rate to changes in pressure drop. On the other hand, the experimental response was more or less sigmoidal. At the same pressure drop, radial column showed 2-3 times higher flow rates than those of axial column both theoretically and experimentally. Using r-HBsAg crude extract, protein resolution effects between the two types of columns at different flow rates were compared side-by-side. It turned out that, though general chromatographic behavior was very similar, axial column was somewhat superior in terms of r-HBsAg recovery yield and specificity. However, the number of theoretical plates analysis indicated the protein resolution effects were comparable.

• 농업생명과학연구
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• 제45권6호
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• pp.193-199
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• 2011

An efficient transient expression system has been developed and characterized for the production of foreign genes in seedlings. The seedlings can be easily produced from commercial seeds used for vegetable sprouts. In principal, a chemical abrasive was employed to generate wounds in seedlings prior to vacuum-infiltration with Agrobacterium tumefaciens bearing the target gene. This optimized chemical wounding-assisted agro-infiltration process resulted in up to 15-fold increase in $\beta$-glucuronidase (GUS) enzyme activity. This procedure has been used efficiently to express hepatitis B surface antigen (HBsAg) protein in a transient mode. Therefore, seedlings with proper wounds can be suggested as a convenient tool for the production of useful recombinant proteins.