• 대한한의학원전학회지
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• 제20권2호
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• pp.195-200
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• 2007

Lee Je-Ma's theory claimed Xin(心) as Qi(氣). But he also described Xin as Taiji(太極) in the center as if Xin combines LI(理) and Qi. Taiji is meant to be a residence of the body, but it does not mean that Xin equals Li. The relations between Xin and the remaining four viscera are similar to the relations between RenXin(人心) and DaeXin(道心) and Zhuzi's(朱子) theory in many respects. If the theory that Xin equals Daoxan and FeiPiGanShen(肺脾肝腎) equals RenXin is acceptable, the vertical relations between Xin and FeiPiGanShen can be explained. That is, Xin is explained as the controller of the body, and FeiPiGanShen acts as a subordinate serving Xin. In other words, the relations associated with Xin can explain physiological states of the body. When the Xin does not function normally, FeiPiGanShen cannot perform its roles and will have a negative impact on physiological functions of the body.

• BMB Reports
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• 제45권10호
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• pp.554-559
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• 2012

Oligosaccharide modification by N-acetylglucosaminyltransferase-V (GnT-V), a glycosyltransferase encoded by the Mgat5 gene that catalyzes the formation of ${\beta}1$,6GlcNAc (N-acetylglucosamine) branches on N-glycans, is thought to be associated with cancer growth and metastasis. Overexpression of GnT-V in cancer cells enhances the signaling of growth factors such as epidermal growth factor by increasing galectin-3 binding to polylactosamine structures on receptor N-glycans. In contrast, GnT-V deficient mice are born healthy and lack ${\beta}1$,6GlcNAc branches on N-glycans, but develop immunological disorders due to T-cell dysfunction at 12-20 months of age. We have developed Mgat5 transgenic (Tg) mice (GnT-V Tg mice) using a ${\beta}$-actin promoter and found characteristic phenotypes in skin, liver, and T cells in the mice. Although the GnT-V Tg mice do not develop spontaneous cancers in any organs, there are differences in the response to external stimuli between wild-type and GnT-V Tg mice. These changes are similar to those seen in cancer progression but are unexpected in some aspects. In this review, we summarize what is known about GnT-V functions in skin and liver cells as a means to understand the physiological roles of GnT-V in mice.

• 동의생리병리학회지
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• 제30권6호
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• pp.370-375
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• 2016

Recent advances in systems biology are shedding a new light on the traditional medicine research. The systems biology highlights the way each component interacts with each other within a system, and the network behavior that emerges from such interactions. This feature of systems biology can accent the systemic aspects of Korean medicine such as the mechanism of action of herbal formulae, pattern differentiation, and the meridian systems, as both the Korean medicine and the systems biology theorize the human physiological functions and phenomena from a holistic point of view. This paper outlines the meaning of the recent Korean medicine research using the systems biology methodology. We discuss the methodologies of the two fields in a comparative manner, and overview the advantages and limitations of the integrated approaches. Finally, we suggest the future prospects for the systems biology inspired approaches to the Korean medicine research. The systems biology may provide a new modernized research methodology for the Korean medicine that can highlight its unique features.

• BMB Reports
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• 제36권4호
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• pp.344-348
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• 2003

Protein kinase CKII is composed of two catalytic ($\alpha$ or $\alpha$') subunits and two regulatory ($\beta$) subunits. The $CKII{\beta}$ subunit is thought to mediate the tetramer formation and interact with other target proteins. However, its physiological function remains obscure. In this study, point mutants of $CKII{\beta}$ that are defective for the L41 binding were isolated by using the reverse two-hybrid system. A sequence analysis of the point mutants revealed that Asp-26, Met-52, and Met-78 of $CKII{\beta}$ are critical for L41 binding; Asn-67 (and/or Lys-139) and Met-52 are important for $CKII{\beta}$ homodimerization. Two point mutants, R75 and R83, of $CKII{\beta}$ interacted with L5, topoisomerase $II{\beta}$, and CKBBP1/SAG, but not with the wild-type $CKII{\beta}$. This indicates that $CKII{\beta}$ homodimerization is not a prerequisite for its binding to target proteins. These $CKII{\beta}$ point mutants may be useful in exploring the biochemical physiological functions of $CKII{\beta}$.

• BMB Reports
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• 제41권2호
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• pp.102-107
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• 2008

Extracellular proteases play an important role in a wide range of host physiological events, such as food digestion, extracellular matrix degradation, coagulation and immunity. Among the large extracellular protease family, serine proteases that contain a "paper clip"-like domain and are therefore referred to as CLIP-domain serine protease (clip-SP), have been found to be involved in unique biological processes, such as immunity and development. Despite the increasing amount of biochemical information available regarding the structure and function of clip-SPs, their in vivo physiological significance is not well known due to a lack of genetic studies. Recently, Drosophila has been shown to be a powerful genetic model system for the dissection of biological functions of the clip-SPs at the organism level. Here, the current knowledge regarding Drosophila clip-SPs has been summarized and future research directions to evaluate the role that clip-SPs play in Drosophila immunity are discussed.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2008년도 추계학술대회A
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• pp.1479-1483
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• 2008

The three main physiological functions of nose are air-conditioning, filtering and smelling. Knowledge of airflow characteristics in nasal cavities is essential to understand the physiological and pathological aspects of nasal breathing. Several studies have utilized physical models of the healthy nasal cavity to investigate the relationship between nasal anatomy and airflow. In our laboratory, there have been a series of experimental investigations on the nasal airflow in normal and deformed nasal cavity models by PIV under both constant and periodic flow conditions. In this time, airflow inside normal nasal cavity is investigated numerically by the FVM general purpose code. The comparisons with PIV measurement are appreciated. Heat and humidity transfer is dealt numerically. Dense CT data and careful treatment of model surface under the ENT doctor’s advice provide more sophisticated cavity models for both PIV experiment and numerical grid system. Average and RMS velocity distributions have been obtained for inspirational and expirational nasal. Temperature distribution, heat and humidity transfer through the mucosa are obtained.

• BMB Reports
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• 제47권2호
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• pp.51-59
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• 2014

Cellular senescence is a physiological process of irreversible cell-cycle arrest that contributes to various physiological and pathological processes of aging. Whereas replicative senescence is associated with telomere attrition after repeated cell division, stress-induced premature senescence occurs in response to aberrant oncogenic signaling, oxidative stress, and DNA damage which is independent of telomere dysfunction. Recent evidence indicates that cellular senescence provides a barrier to tumorigenesis and is a determinant of the outcome of cancer treatment. However, the senescence-associated secretory phenotype, which contributes to multiple facets of senescent cancer cells, may influence both cancer-inhibitory and cancer-promoting mechanisms of neighboring cells. Conventional treatments, such as chemo- and radiotherapies, preferentially induce premature senescence instead of apoptosis in the appropriate cellular context. In addition, treatment-induced premature senescence could compensate for resistance to apoptosis via alternative signaling pathways. Therefore, we believe that an intensive effort to understand cancer cell senescence could facilitate the development of novel therapeutic strategies for improving the efficacy of anticancer therapies. This review summarizes the current understanding of molecular mechanisms, functions, and clinical applications of cellular senescence for anticancer therapy.

• 한국식품영양과학회지
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• 제29권3호
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• pp.460-465
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• 2000

본 연구는 여성 갱년기장애에 대한 홍삼의 효과를 조사할 목적으로 수행하였다. 홍삼의 효과는 자연적으로 갱년기 장애가 유도되었다고 생각되는 자성 노령흰쥐를 사용하여 홍삼 조사포닌 분획을 투여(20mg/kg,b.w./day) 한 후 그 효괴를 조사하였다. 홍삼조사포닌 분획은 노령쥐의 체지방 축적으로 야기되는 체중 증가를 다소 감소시키는 것으로 관찰되었다. (p<0.01). 노령쥐는 젊은 쥐에 비해 혈중 당, 총콜레스테롤, BUN 함량이 증가하였는데 조사포닌 분획의 투여는 혈당, 총콜레스테롤 함량 및 BUN 함량증기를 유의하게 억제하는 것으로 나타났다. (p<0.05, p<0.01). 노령쥐는 노령화에 따른 간기능의 저하로 GOT 및 GPT 활성이 증가하였으나 사포닌의 투여는 GOT 및 GPT 활성증가를 억제하여 간기능을 젊은 쥐의 수준으로 회복시킴을 알 수 있었다. (p<0.01). 노령쥐의 대퇴골은 사포닌투여와 관계없이 현저한 무게차이가 관찰되자 않았으나 대퇴골중 무기이온 Na+ 함량은 사포닌 투여시 약 2배 증가하는 것으로 나타났다. 이러한 사실로부터 홍삼 조사포닌 분획은 노령쥐의 혈당, 총콜레스테롤, BUN 함량증가를 억제하는 효과를 나타내며 또한 노령화에 따른 간기능 관련 생화학 지수를 개선하는 것으로 사료된다.

• 한국식생활문화학회지
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• 제18권6호
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• pp.592-600
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• 2003

Male rats were fed a purified diet containing one of 3 experimental diets, gelatinized rice starch that was not modified physically (RC), gelatinized physically modified rice starch using ultrasonic homogenizer(RU), gelatinized physically modified rice starch using hydroshear homogenizer(RH) during 28 days. RC was used as the rice starch control. Feeding a physically modified rice starch (RU) caused an increase in liver weight and RH increased RNA and protein contents in kidney significantly although there were no differences in food intakes compared to feeding a RC diet. The wet weight of liver, kidney and heart were higher in RU. The wet weights of fecal output of the rats fed RH was greater than in rice control group. The gut transit time was longer in the rats fed RH than in the rice control group significantly. Serum GOT, GPT, total bilirubin concentration were tended to be lower and blood urea nitrogen was significantly lower in RH group. The maturation index of kidney was higher in RU than in RC. These results suggest that physically modified rice starch improved growth performance and physiological functions in organs of growing rats.

• Molecules and Cells
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• 제26권3호
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• pp.270-277
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• 2008

This study addresses the physiological functions of the Ran-binding protein homolog NbRanBP1 in Nicotiana benthamiana. Virus-induced gene silencing (VIGS) of NbRanBP1 caused stunted growth, leaf yellowing, and abnormal leaf morphology. The NbRanBP1 gene was constitutively expressed in diverse tissues and an NbRanBP1:GFP fusion protein was primarily localized to the nuclear rim and the cytosol. BiFC analysis revealed in vivo interaction between NbRanBP1 and NbRan1 in the nuclear envelope and the cytosol. Depletion of NbRanBP1 or NbRan1 reduced nuclear accumulation of a NbBTF3:GFP marker protein. In the later stages of development, NbRanBP1 VIGS plants showed stress responses such as reduced mitochondrial membrane potential, excessive production of reactive oxygen species, and induction of defense-related genes. The molecular role of RanBP1 in plants is discussed in comparison with RanBP1 function in yeast and mammals.