• 대한한방내과학회지
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• 제32권4호
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• pp.565-583
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• 2011

Objectives : This study investigated the biochemical mechanisms of anti-proliferative and pro-apoptotic effects of the water extract of Dan-Seon-Tang (DST) in human leukemia U937 cells. Methods : U937 cells were exposed to DST and growth inhibition was measured by MTT assay. Results : Exposure of U937 cells to DST resulted in the growth inhibition in a concentration-dependent manner. This inhibitory effect was associated with morphological changes and apoptotic cell death such as formation of apoptotic bodies, increased populations of apoptotic-sub G1 phase and induction of DNA fragmentation. The induction of apoptotic cell death in U937 cells by DST was associated with up-regulation of death receptor 4 (DR4) and down-regulation of Bid, surviving and cellular inhibition of apoptosis protein-2 (cIAP-2) expression. DST treatment also induced the proteolytic activation of caspase-3, caspase-8 and caspase-9, and a concomitant degradation of caspase-3 substrate proteins such as poly (ADP-ribose) polymerase (PARP), phospholipase (PLC)-${\gamma}1$, ${\beta}$-catenin and DNA fragmentation factor 45/inhibotor of caspase activated DNAse (DFF45/ICAD). Furthermore, apoptotic cell death by DST was significantly inhibited by caspase-3 specific inhibitor z-DEVD-fmk, demonstrating the important role of caspase-3. Conclusions : These findings suggest that herb prescription DST may be a potential chemotherapeutic agent for the control of human leukemia U937 cells; further study is needed to identify the active compounds.

• 대한수의학회지
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• 제48권3호
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• pp.323-326
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• 2008

A two-year-old mixed breed sow was requested to the Veterinary Pathology Laboratory of Cheju National University with a clinical signs of severe abdominal pain and sudden death. Grossly, there was severe hemorrhage in abdominal cavity. Most of internal parenchymas and subcutaneous muscle showed severe pale discoloration. Both ovaries were enlarged with oval to round protruding multilobular masses and dark red in color. And they were firm and contained multiple small cysts in their cut surface. Histopathologically, numerous neoplastic granulosa cells had spherical-to-oval, hyperchromatic nuclei and scant eosinophilic cytoplasms were distributed with follicular pattern in ovarian masses. And the typical Call-Exner bodies, distinctive microcavityies, were observed in the center of small neoplastic follicles. Based on the gross and histopathologic findings, this case was diagnosed as granulosa cell tumor. In our best knowledge, this is believed to be the first report of granulosa cell tumor in a sow in Korea.

• 대한기관식도과학회:학술대회논문집
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• 대한기관식도과학회 1978년도 제12차 학술대회연제 순서 및 초록
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• pp.4.1-4
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• 1978

식도 및 기도이물은 이비인후과 영역에서 자주 볼 수 있는 질환이며 특히 기도이물은 단시간내에 치명적일 경우가 있으므로 이비인후과 영역에서 매우 중요하다고 하겠다. 저자들은 1968년 6월부터 1978년 4월까지 최근 9년10개월간 본원에 내원하였던 95례의 식도 및 기도이들 환자들을 임상통계학적으로 분석하여 다음과 같은 결과를 얻었기에 문헌고찰과 함께 보고하는 바이다. 1. 식도 및 기도이물관자는 총 95례로서 식도이물이 89례(93.7%), 기도이물이 6례(6.3%)였으며 그 비는 14.8 : 1이었다. 2. 성별비에서는 64례(67.4%)가 남자였고, 31례(32.6%)가 여자로서 그 비는 2. 1 : 1이었다 3. 식도 및 기도이물을 종류별로 보면 식도이물에서는 주화. 바둑돌, 돌의 순서로 많았고, 기도에서는 땅콩 및 콩종류가 가장 많았다. 4. 연령별로는 5세이하가 64례(67.4%)였으며 특히 주화는 5세이하가 52례(92.9%)였다. 육류를 제외한 거의 모든 이물은 10세이하에서 발생하였다. 5. 년도별 및 월별분포에서는 뚜렷한 경향을 볼 수는 없었으나 최근 2년간 그 빈도가 현저히 감소하였다. 6. 식도 및 기도이물의 발생부위를 보면 식도이물은 제 1협착부에서 70례(78.7%)로 가장 많았으며, 육류는 계 2 협착부에 가장 많았으며 대부분에서 상흔협착을 동반한 경우였었다. 기도이물의 부위별 빈도는 기관지가 가장 많았으며 3 : 2로 우측에 많았다. 7. 이물의 체류기간은 1일 이내인 경우가 50례(52.6%)로 가장 많았고 한달이상 경과한 후 내원한 경우도 3례가 있었다. 8. 식도이물은 국소마취하에 83례(93.3%)는 식도경을 통하여 제거하였으나 6례(6.7%)는 제거하지 못하였다. 기도이물 6례는 모두 기관지경을 통하여 제거하였으며 이중 5세이하의 5례는 기관절개공을 통하여 제거하였다.였다. 주화의 경우 총 61례중 8례(13.1%)는 검사도중에 위속으로 내려갔다. 기도이물에서 후두이물 2례는 국소마취하에 후두경으로, 기관이물 5례중 2례(40%)는 국소마취하에 기관절개술과 함께 기관지경술로, 3례(60%)는 전신마취하에 기관지경술로 적출하였으며 기관지이물 1례는 흉부외과에서 전신마취하에 개흉술로 적출하였다.과를 매년 보고하는 한편 15년간 단속 followup할 예정이다.to-$PGF_{1{\alpha}}$생성증가 효과는 prostacyclin 합성효소억제제에 의해 길항하였다. 이상의 결과와 같이 인삼saponin 성분들은 arachidonic acid로부터 cyclooxygenase를 통해 일단 생성된 endoperoxide에서 각각의 prostaglandin을 생성하는 효소, 특히 G-$Rb_2$는 $TXA_2$ synthetase에 강력한 억제제로, G-Re는 prostacyclin 생합성에 촉진데로 심혈관계 균형에 기여하리라 생각된다. 발생하는 free radical을 소거할 수 있는지를 조사한 결과, free radical을 50% 소거시키는 농도값이 6 $\mu\textrm{g}$/$m\ell$로 표준물질인 비타민 C (19 $\mu\textrm{g}$/$m\ell$)나 butylated hydroxyl toluene (18.5 $\mu\textrm{g}$/$m\ell$)보다 우수한 효과를 나타내었다. 그리고 mast cell내에서 활성화되며 hyaluronic acid를 분해하는 hyaluronidase에 대한 저해를 조사한 결과, $IC_{50}$/ 값이 210 $\mu\textr

• 한국콘텐츠학회논문지
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• 제11권8호
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• pp.239-246
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• 2011

한국에서 변사자 처리의 문제점은 변사체를 가장 먼저 접촉하고 실제 검시업무를 주도적으로 담당하는 일선 사법경찰관들이 비전문가로 인하여 사망에 대한 정확한 사인분석이 어렵다는 것이다. 이는 때로는 살인자에게 면죄부를 주어 억울한 희생자를 만들어 낼 수 있다는 점에서 변사자 초기대응에 대한 경찰의 활동은 반드시 개선되어야 한다. 이에 대한 방안으로 우리나라와 유사한 구조를 가지는 대륙법계에의 일본경찰제도를 중심으로 살펴보고 이를 바탕으로 한국경찰의 변사자 대응에 대한 시사점을 제시하면 다음과 같다. 첫째, 사체취급업무의 제도를 강화해야 한다. 형사조사관 제도를 도입하여 형사조사관, 형사조사관보조를 양성하고 사체의 사인규명에 대한 검시제도를 강화해야 한다. 둘째, 사체취급업무에 종사하는 경찰관에 대한 교육을 강화해야 한다. 셋째, 사체취급업무와 관련한 기자재를 확보해야 한다. 사체취급현장에서 신속히 자 타살을 판단하기 위한 기자재 등을 적극적으로 확보할 수 있도록 예산을 확보해야 한다.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제44권1호
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• pp.18-24
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• 2018

Objectives: Foreign bodies (FBs) account for 3.8% of all pathologies of the head and neck region, and approximately one third of them are missed on initial examination. Thus, FBs represent diagnostic challenges to maxillofacial surgeons, rendering it necessary to employ an appropriate imaging modality in suspected cases. Materials and Methods: In this cross-sectional study, five different materials, including wood, metal, glass, tooth and stone, were prepared in three sizes (0.5, 1, and 2 mm) and placed in three locations (soft tissue, air-filled space and bone surface) within a sheep's head (one day after death) and scanned by panoramic radiography, cone-beam computed tomography (CBCT), and ultrasonography (US) devices. The images were reviewed, and accuracy of the detection modalities was recorded. The data were analyzed statistically using the Kruskal-Wallis, Mann-Whitney U-test, Friedman, Wilcoxon signed-rank and kappa tests (P<0.05). Results: CBCT was more accurate in detection of FBs than panoramic radiography and US (P<0.001). Metal was the most visible FB in all of modalities. US was the most accurate technique for detecting wooden materials, and CBCT was the best modality for detecting all other materials, regardless of size or location (P<0.05). The detection accuracy of US was greater in soft tissue, while both CBCT and panoramic radiography had minimal accuracy in detection of FBs in soft tissue. Conclusion: CBCT was the most accurate detection modality for all the sizes, locations and compositions of FBs, except for the wooden materials. Therefore, we recommend CBCT as the gold standard of imaging for detecting FBs in the maxillofacial region.

• 대한수사과학회지
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• 제2권2호
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• pp.67-91
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• 2007

The nature of deaths occurred at sea may be revealed the differences from that in the land, but there is no comprehensive statistical analysis of deaths occurred at Korean Sea so far. Therefore, the cases of deaths or missing in the period 1993 - 2006 were analyzed by the cause, place of death, and results of preliminary investigation. In the period from 1993 to 2006, over 1000 peoples were died or missing every year. The cases of marine safety accidents including self-carelessness and mishap were approached over 60% and cases of homicide were less than 1%. The closure cases of preliminary investigation were reached over 70% and the most of deaths occurred in fishing vessels (the range of 20 ~ 99 tonnage). The suspension cases of preliminary investigation were reached to 70% of all missing and drowning cases. The results showed that the most of deaths occurred at sea could be prevented by the safety regulations including mandatory report of accidents, marine safety education and training, punishment the people responsible for the accidents. For the unidentified bodies, data should be collected and recorded for the future identification. The crime scene investigators should be trained to ensure the quality of their professional skills regularly.

• International Journal of Oral Biology
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• 제35권2호
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• pp.35-42
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• 2010

The use of bacteria in the treatment of cancer has a long and interesting history. The use of live bacteria in this way however has a number of potential problems including toxicity. Purified low molecular weight bacterial proteins have therefore been tested as anticancer agents to avoid such complications. Oral cancer is a widely occurring disease around the world and these lesions are typically very resistant to anticancer agents. In our present study we investigated the effects of purified recombinant azurin from Pseudomonas (P.) aeruginosa against YD-9 (p53-positive) human oral squamous carcinoma cells. Azurin showed cytotoxic effects against these cells in a dose dependent manner. The cell death accompanied by this treatment was found to be characterized by chromatin condensation and apoptotic bodies. Azurin treatment was further found to increase the expression of p53 The stabilization of p53 and induction of apoptosis in YD-9 cells by azurin suggests that it has potentially very strong anticancer properties in oral squamous carcinoma.

• 한국어병학회지
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• 제16권1호
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• pp.39-49
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• 2003

Cytosolic oxidation by 4-hydroxy-2-nonenal (4HNE) and tert-butyl hydroperoxide (t-BHP) results in cell death of bovine aortic endothelial cells (BAEC). In this study, we have investigated the roles of antioxidants such as 2,3,6-tribromo-4,5-dihydroxy benzyl methyl ether (TDB) and phloroglucinol in preventing cell death. After treatment with oxidants for 6h, cells became compact and showed nuclear condensation, which were characteristics of early apoptosis. After l2h treatment, morphologic features including severe cytoplasm condensation, membrane blebbing, and apoptotic bodies were prominent and these findings were interpreted as characteristics of late-apoptosis. When the apoptotic cells were treated with antioxidants for 12h, both early and late apoptotic cells did show no significant change. After oxidant treated cells were incubated with antioxidant for 24h, the characteristics of early-apoptosis were eliminated but cells in lateapoptosis could not return to normal cells. These results suggest that TDB and phloroglucinol prevent the cells from dying through apoptosis induced by 4HNE and t-BHP in early stage.

• 대한한방내과학회지
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• 제29권1호
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• pp.42-66
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• 2008

Aconiti Tuber is a traditional medicinal plant generally used in Oriental medicine therapy. In this study, we investigated the biochemical mechanisms of anti-proliferative effects by the methanol extract of Aconiti tuber (MEBJ) in Caki-1 human renal cell carcinoma cells. It was found that MEBJ could inhibit, in a dose-dependent manner, cell growth which was associated with apoptotic cell death such as formation of apoptotic bodies, DNA fragmentation and increased populations of apoptotic-sub G1 phase. Apoptosis of Caki-1 cells by MEBJ was associated with an up-regulation of pro-apoptotic Bax expression, and a down-regulation of anti-apoptotic Bcl-2 in a dose-dependent manner; however, the levels of IAP family were not affected. MEBJ treatment also induced the proteolytic activation of caspase-3 and -8, and a inhibition of poly(ADP-ribose) polymerase (PARP) and $PLC{\gamma}1$ protein. Furthermore, MEBJ treatment caused a dose-dependent inhibition of iNOS and cyclooxygenase-2 (Cox-2). Though further studies will be needed to identify the active compounds that confer the anti-cancer activity of MEBJ, the present findings provide important new insights into the possible molecular mechanisms of the apoptotic activity of MEBJ in cancer cells.

• 대한수의학회지
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• 제36권4호
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• pp.1013-1016
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• 1996

Since 1993, sudden and massive death has occurred among penaeid shrimp, Penaeus orientalis cultured in Korea. We investigated the pathological characterizations on the spontaneously and experimentally infected penaeid shrimp. The major gross findings of the spontaneous cases were 2-6mm sized-white spots on the inside of the carapace and reddish discolorization. Histopathologically, massive necrosis of lymphoid organ, degeneration and necrosis of epithelia of epidermis and foregut were observed in both spontaneous and experimental cases. Amphophilic to basophilic intranuclear inclusion bodies were readly observed epithelia of epidermis, foregut and gills. Electron microscopy revealed enveloped, non-occuluded ellipsoid to rod shaped virus particles, within the nucleus, in the lymphoid organs and interstitial cells of hepatopancreas of both spontaneously and experimentally infected shrimps. The size of the virion was $375{\times}167nm$, and the nucleocapsid was $290{\times}75nm$. The causative agent causing massive death in penaeid shrimps in Korea resembles baculovirus associated with white spot syndrome (WSBV) occurred in Taiwan in virus morphology and gross and histological changes of the shrimps.