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하태열,안지윤,Ha, Tae-Yeol,An, Ji-Yun 한국식품연구원 2003 食品技術 Vol.16 No.1
의료기술 및 생활수준의 향상과 함께 우리나라의 평균수명은 꾸준하게 늘어 2016년에는 65세 이상 인구가 전체의 20% 넘을 것으로 예상되고 있다. 이러한 노인인구의 증가와 더불어 노인성 치매는 오늘날의 고령화 사회에서 높은 발병율(65세 이상 인구의 10%, 75세 이상 인구의 25%, 85세 이상 인구의 50%에서 발생)을 보이고 있어 심각한 사회문제의 하나로 대두되고 있다. 또한 우리나라 치매노인의 증상은 가벼운 경우가 59.2%, 중등정도 27.2%, 아주 심한 경우가 13.6%이며 이중 치료를 통해 완치되는 경우는 겨우 14%에 불과하며 85% 이상이 치료불가능으로 보고되고 있다. 이와 같이 노인성 치매는 일단 발병하면 완전 치료가 거의 불가능할 뿐만 아니라 심하면 한 가정의 파탄을 초래하기도 할만큼 치매간호에 소요되는 정신적, 육체적, 경제적 고통은 막대하다. 따라서 의.약학계에서도 치매치료제에 대하여 다각도로 연구하고 있으나 지금까지 개발된 화학적 합성 의약품은 그 효능여부와 부작용 등의 논란이 크게 대두되고 있으며 또한 치매는 어떠한 질병보다 예방의 중요성이 인식되고 있는 만큼 이러한 부작용을 최소화 할 수 있는 예방 또는 개선차원의 식품소재개발이 중요하다고 하겠으며 이에 대한 연구자의 관심이 집중되고 있다. 본고에서는 현재 치매예방 및 치료제의 개발현황과 연구동향을 소개하고자 한다.
미강 페놀산 농축물과 Hydroxycinnamic Acids의 세포내 항당뇨 및 항산화 활성
정은희 ( Eun Hee Jung ),하태열 ( Tae Yeol Ha ),황인경 ( In Kyeong Hwang ) 한국식품영양학회 2010 韓國食品營養學會誌 Vol.23 No.2
Phenolic acid concentrates of rice bran(RB-ex) and hydroxycinnamic acids were investigated for their anti-hyperglycemic activities through glucose uptake and glucokinase activity using HepG2 cells and stimulatory effects on insulin secretion using HIT-TI5 cells. RB-ex was prepared as an ethylacetate extract after alkaline hydrolysis and hydroxycinnamic acids, found as major compositions of RB-ex, such as ferulic acid(FA), sinapic acid(SA) and p-coumaric acid(p-CA) were investigated to compare with the properties of RB-ex. The properties of glucose uptake in HepG2 cells were examined in the absence of insulin and two different glucose concentrations(5.5 mM and 25 mM). RB-ex and FA showed anti-hyperglycemic activities through the increase of glucose uptake and the stimulation of glucokinase activity in HepG2 cells. RB-ex exhibited higher glucose uptakes with higher glucose concentrations, whereas FA exhibited the same increasing effects on both concentrations of glucose. RB-ex and FA exhibited doubled glucokinase activities relative to control. In the presence of insulin in the 25 mM glucose-containing medium, the levels of glucose uptake were increased in all treatments compared with control. As stimulatory effects of samples on insulin secretion were estimated, RB-ex and FA stimulated insulin secretion at a concentration of 25㎕/㎖ and in particular, FA showed the highest amount of insulin-release in HIT-TI5 cells. Antioxidative effects on BIT-TI5 cells, RB-ex and hydroxycinnamic acids, excluding p-CA, showed inhibitory activities of 78% to 80% at a concentration of 100㎕㎖. On the basis of these results, we conclude that RB-ex and FA could help decrease blood glucose levels and prevent the cell damages via antioxidant activity.
밥 식이와 빵 식이가 지구성 운동 후 혈중 중성지방, 인슐린 및 그렐린에 미치는 영향
유동훈(Dong-Hun Yoo),하태열(Tae-Yeol Ha),안지윤(Ji-Yoon Ahn),정현령(Hyun-Lyung Jung),강호율(Ho-Youl Kang) 한국식품영양과학회 2012 한국식품영양과학회지 Vol.41 No.8
In this study, the effects of a rice diet and bread diet on plasma triglyceride, insulin and ghrelin levels during low-intensity endurance exercise and recovery were investigated. Ten male students randomly received 2 different treatments: the rice diet and bread diet. On the first day, the participants performed 2 hours of treadmill running with 6% uphill at 50% VO2max after breakfast and then each consumed lunch and dinner. Blood samples were drawn 120 min before exercise and, right before exercise and, 60 min and 120 min after the start of exercise. On the second day, blood samples were drawn prior to breakfast, immediately after breakfast and, 60 min, 120 min, and 180 min after breakfast with no exercise treatment. Plasma triglyceride, ghrelin, glucose, and insulin levels were not significantly different between the two treatment groups on the first day. In addition, there was no difference in the carbohydrate and fat oxidation rate between the two treatments groups. However, plasma triglyceride levels in subjects that received the rice diet were significantly reduced by 14% when compared to subjects that received the bread diet at 180 min after consuming the breakfast diet on the second day. Ghrelin levels were significantly higher for subjects that received the rice diet than subjects that were given the bread diet. However, insulin in participants that consumed the rice diet was significantly lower than those that received the bread diet at 60 min and 120 min after consumption of the breakfast diet on the second day. Glucose levels in the subjects that were given the rice diet were significantly reduced by 10.3% when compared with participants that received the bread diet at 60 min. Therefore, the results of the study showed that a rice diet may be more effective in preventing cardiovascular diseases than a bread diet when combined with exercise.