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PCI Interface HDTV 수신카드의 인식률 개선
서영하(Young-Ha Seo),김용득(Yong-Deak Kim) 한국멀티미디어학회 2009 한국멀티미디어학회 학술발표논문집 Vol.2009 No.1
본 논문은 LGDT3303(VSB IC)를 사용한 PCI 지상파 HDTV 수신카드의 인식률 개선에 관한 것이다. Desktop 시스템에서 초기 부팅시 LGDT3303 IC가 장착된 PCI HDTV card 인식률 개선방법에 대해 설명하였으며 양산제품 출하 후 PCI HDTV 인식불량 현상을 없애므로써 SCR(Service Call Rate)및 제품 유지보수 비용을 감소시킬 수 있다.
산화스트레스가 유도된 TM3 세포에서 통캇알리 추출물이 테스토스테론 생성에 미치는 영향
정재인,은상원,이재경,서영하,배문형,김룡,김은지 한국식품영양과학회 2022 한국식품영양과학회지 Vol.51 No.7
통캇알리 추출물은 선행 동물시험과 인체적용시험에서 테스토스테론을 증가시킴으로써 남성갱년기 증상 개선 가능성이 제시되었으나 테스토스테론 증가 기전에 대해 밝혀지지 않았다. 본 연구에서는 H2O2로 산화스트레스를 유도한 TM3 세포에 통캇알리 추출물이 테스토스테론 수준과 테스토스테론의 생성과 전환에 관여하는 효소의 발현을 조사함으로써 테스토스테론 증가 기전을 밝히고자 하였다. TM3 세포에 50 μM H2O2로 산화스트레스를 유도한 경우는 테스토스테론 수준이 유의적으로 감소하였고, 콜레스테롤 운반체로 작용하는 StAR 발현과 테스토스테론 생성에 관여하는 3β-HSD와 CYP17A1 발현이 유의적으로 감소하였다. 반면 테스토스테론 전환에 관여하는 5α-reductase와 aromatase의 발현은 50 μM H2O2 처리에 의해 유의적으로 증가하였다. H2O2로 산화스트레스를 유도한 TM3 세포에 통캇알리 추출물을 여러 농도(10, 25, 50 및 100 μg/mL)로 처리한 경우 테스토스테론 수준이 유의적으로 증가하였다. 통캇알리 추출물 처리에 의해 StAR, 3β-HSD 및 CYP17A1 발현이 유의적으로 증가하였으나 5α-reductase와 aromatase 발현이 유의적으로 감소하였다. 이는 통캇알리 추출물이 미토콘드리아 내로의 콜레스테롤 이동과 테스토스테론 생성을 증가하고 테스토스테론 전환을 감소함으로써 산화스트레스에 의한 테스토스테론 감소를 개선함을 나타내며, 테스토스테론 감소에 의한 남성갱년기 증상을 개선할 수 있는 가능성을 제시한다.
김주혜,박희진,배문형,서영하,구은영,오택근,이병석 충남대학교 농업과학연구소 2024 Korean Journal of Agricultural Science Vol.51 No.2
Cordyceps militaris L. (C. militaris ) has been traditionally used as tonic medicine for metabolic syndrome. Cordycepin, has been reported with immunomodulatory, antitumor, and hepatoprotective effect, is the main extract from C. militaris . This study was conducted to evaluate the alcohol degradation and hepatoprotective effect of cordycepin-enriched C. militaris extract (CM) powder in chronic and binge ethanol (ethanol Lieber-DeCarli diet)-fed male C57BL/ 6 Mice. Cordycepin-enriched C. militaris extract powder was orally administered once daily at dose levels of 0, 125, 250, and 500 mg·kg-1·day-1 for 16 days. For evaluating alcohol degradation, ethanol concentration and alcohol dehydrogenase (ADH) and aldehyde dehydrogenase (ALDH) activity were measured in serum. Serum ethanol (EtOH) concentration was decreased at CM treated groups, and the activities of ADH and ALDH were increased dose-dependently at CM treated groups compare to EtOH model group. In clinical chemistry, the values of aspartate aminotransferase (AST) and alanine aminotransferase (ALT) were lower in CM treated groups than those in EtOH model group. Additionally, absolute and relative (to body weight) liver weights were statistically decreased in the CM treated groups compared to the EtOH model group. In conclusion, our study showed that cordycepin-enriched C. militaris extract powder exhibits hepatoprotective effect by upregulating the ADH and ALDH enzyme in an alcoholic liver disease model.
박희진,김주혜,배문형,서영하,구은영,오택근,이병석 충남대학교 농업과학연구소 2024 Korean Journal of Agricultural Science Vol.51 No.2
Hepatic fibrosis refers to the scarring of liver tissue, often resulting from chronic liver injury or inflammation. It is characterized by excessive deposition of extracellular matrix proteins, impairing liver function and potentially progressing to cirrhosis if left untreated. To improve the liver functions, Cordyceps militaris , a species of parasitic fungus known for its medicinal properties, is used in the form of extract. It has been traditionally used in Chinese medicine to boost energy, improve stamina, and support overall health. In this study, we investigated the hepatoprotective effects of Cordyceps militaris extract powder in a liver injury model induced by hepatic fibrosis. Sprague-Dawley (SD) rats were administered Dimethylnitrosamine (DMN) to induce liver injury, and the hepatoprotective effects of Cordyceps militaris extract powder intake were assessed by comparing changes in liver enzyme levels and histological observations. Rats injected with DMN were orally administered Cordyceps militaris extract powder at doses of 0, 125, 250, and 500 mg·kg-1·day-1 for three weeks. After three weeks of treatment, no significant differences were observed in hematological, clinical chemical, organ weight, gross examination, or microscopic examination between the DMN-alone group and the Cordyceps militaris extract powder-treated group. In conclusion, hepatoprotective effects against DMN-induced liver injury in SD rats treated with Cordyceps militaris extract powder were not observed under this study condition.
김주혜,박희진,배문형,서영하,구은영,오택근,이병석 충남대학교 농업과학연구소 2024 Korean Journal of Agricultural Science Vol.51 No.2
Herbal medicinal mushroom Cordyceps militaris has been traditionally used as tonic medicine for metabolic syndrome. Cordycepin, main extract of C. militaris , has been reported with immunomodulatory, anticancer, and hepatoprotective effects. This study was conducted to evaluate the potential hepatoprotective effect of cordycepin-enriched Cordyceps militaris , against high fat diet (HFD)-induced hepatic steatosis (HS) in male obese (ob/ob) mice. HFD was provided to ob/ob mice ad libitum (except negative control). Cordycepin-enriched C. militaris extract powder (CM) was orally administered once daily at dose levels of 0, 125, 250, and 500 mg·kg-1 for 4 weeks. During the study, body weight gain was statistically increased in all HFD fed groups compared to negative control, but body weight gain in CM 500 mg·kg-1 treated group shows a low tendency compared to HS model group. In organ weights, absolute and relative weights (to body weight) in liver and perirenal adipose tissue were increased in all HFD treated groups except CM 500 mg·kg-1 treated group compared to the negative control. In clinical chemistry, serum glucose and total cholesterol levels in CM 250 and/or 500 mg·kg-1 treated groups were lower than HS model group. In microscopical examination, hepatocyte vacuolation with macrovesicles in HS model group was increased compared to negative control, but this finding was decreased in CM 500 mg·kg-1 treated group compared to HS model group. In this study, CM exhibited hepatoprotective effects against hepatic steatosis at mg·kg-1 in ob/ob mice.