• 제목/요약/키워드: growth regulation

검색결과 1,537건 처리시간 0.031초

영공(領空)과 우주공간(宇宙空間)의 한계(限界)에 관한 법적(法的) 고찰(考察) ("Legal Study on Boundary between Airspace and Outer Space")

  • 최완식
    • 항공우주정책ㆍ법학회지
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    • 제2권
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    • pp.31-67
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    • 1990
  • One of the first issues which arose in the evolution of air law was the determination of the vertical limits of airspace over private property. In 1959 the UN in its Ad Hoc Committee on the Peaceful Uses of Outer Space, started to give attention to the question of the meaning of the term "outer space". Discussions in the United Nations regarding the delimitation issue were often divided between those in favour of a functional approach ("functionalists"), and those seeking the delineation of a boundary ("spatialists"). The functionalists, backed initially by both major space powers, which viewed any boundary as possibly restricting their access to space(Whether for peaceful or military purposes), won the first rounds, starting with the 1959 Report of the Ad Hoc Committee on the Peaceful Uses of Outer Space which did not consider that the topic called for priority consideration. In 1966, however, the spatialists, were able to place the issue on the agenda of the Outer Sapce Committee pursuant to Resolution 2222 (xxx1). However, the spatialists were not able to present a common position since there existed a variety of propositions for delineation of a boundary. Over the years, the funtionalists have seemed to be losing ground. As the element of location is a decisive factor for the choice of the legal regime to be applied, a purely functional approach to the regulation of activities in the space above the Earth does not offer a solution. It is therefore to be welcomed that there is clear evidence of a growing recognition of the defect inherent to such an approach and that a spatial approach to the problem is gaining support both by a growing number of States as well as by publicists. The search for a solution of the problem of demarcating the two different legal regimes governing the space above the Earth has undoubtedly been facilitated, and a number of countries, among them Argentina, Belgium, France, Italy and Mexico have already advocated the acceptance of the lower boundary of outer space at a height of 100km. The adoption of the principle of sovereignty at that height does not mean that States would not be allowed to take protective measures against space activities above that height which constitute a threat to their security. A parallel can be drawn with the defence of the State's security on the high seas. Measures taken by States in their own protection on the high seas outside the territorial waters-provided that they are proportionate to the danger-are not considered to infringe the principle of international law. The most important issue in this context relates to the problem of a right of passage for space craft through foreign air space in order to reach outer space. In the reports to former ILA Conferences an explanation was given of the reasons why no customary rule of freedom of passage for aircraft through foreign territorial air space could as yet be said to exist. It was suggested, however, that though the essential elements for the creation of a rule of customary international law allowing such passage were still lacking, developments apperaed to point to a steady growth of a feeling of necessity for such a rule. A definite treaty solution of the demarcation problem would require further study which should be carried out by the UN Outer Space Committee in close co-operation with other interested international organizations, including ICAO. If a limit between air space and outer space were established, air space would automatically come under the regime of the Chicago Convention alone. The use of the word "recognize" in Art. I of chicago convention is an acknowledgement of sovereignty over airspace existing as a general principle of law, the binding force of which exists independently of the Convention. Further it is important to note that the Aricle recognizes this sovereignty, as existing for every state, holding it immaterial whether the state is or is not a contracting state. The functional criteria having been created by reference to either the nature of activity or the nature of the space object, the next hurdle would be to provide methods of verification. With regard to the question of international verification the establishment of an International Satelite Monitoring Agency is required. The path towards the successful delimitation of outer space from territorial space is doubtless narrow and stony but the establishment of a precise legal framework, consonant with the basic principles of international law, for the future activities of states in outer space will, it is still believed, remove a source of potentially dangerous conflicts between states, and furthermore afford some safeguard of the rights and interests of non-space powers which otherwise are likely to be eroded by incipient customs based on at present almost complete freedom of action of the space powers.

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경제사상의 변화 (공급측면 경제학의 시험) (The changes of economic though (The trial of supply-side economics))

  • 서홍석
    • 한국관광식음료학회지:관광식음료경영연구
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    • 제8권
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    • pp.89-121
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    • 1997
  • Many of the measures and policies advocated by supply-siders, such as lower taxation, less government intervention, more freedom from restrictive legislation and regulation, and the need for increased productivity can be found in writing the classical economist. Nor is supply-side economics a complete divorcement from Keynesian analysis. In both camps the objectives are the same-high level employment, stable prices and healthy economic growth, the means or suggestions for attaining the objectives, however, differ. Consequently, recommended economic policies and measures are different. keynesians rely primarily on the manipulation of effective demand to increase output and employment and to combat inflation. They assume ample resources to be available in order that supply will respond to demand. The supply-siders emphasize the need to increase savings, investment, productivity and output as a means of increasing income. Supply-siders assume that the increase in income will lead to an increase in effective demand. Keynesians suggest that savings, particularly those not invested, dampen economic activity. Supply-siders hold that savings, or at least an increase in after-tax income, stimulates work effort and provides funds for investment. Perhaps keynesians are guilty of assuming that most savings are not going to be invested, whereas supply-siders may erroneously assume that almost all savings will flow into investment and/ or stimulate work effort. In reality, a middle ground is possible. The supply-siders stress the need to increase supply, but Keynes did not preclude the possibility of increasing economic activity by working through the supply side. According to Keynes' aggregate demand-aggregate supply framework, a decrease in supply will increase output and employment. It must be remembered, however, that Keynes' aggregate supply is really a price. Lowering the price or cost of supply would there by result in higher profit and/ or higher output. This coincides with the viewpoint of supply-siders who want to lower the cost of production via various means for the purpose of increasing supply. Then, too, some of the means, such as tax cuts, tax credits and accelerated depreciation, recommended by suply-siders to increase productivity and output would be favored by Keynesians also as a means of increasing investment, curbing costs, and increasing effective demand. In fact, these very measures were used in the early 1960s in the United State during the years when nagging unemployment was plaguing the economy. Keynesians disagree with the supply-siders' proposals to reduce transfer payments and slow down the process of income redistribution, except in full employment inflationary periods. Keynesians likewise disagree with tax measures that favored business as opposed to individuals and the notion of shifting the base of personal taxation away from income and toward spending. A frequent criticism levied at supply-side economics is that it lacks adequate models and thus far has not been quantified to any great extent. But, it should be remembered that Keynesian economics originally was lacking in models and based on a number of unproved assumptions, such as, the stability of the consumption function with its declining marginal propensity to consume. Just as the economic catastrophe of the great depression of the 1930s paved the way for the application of Keynesian or demand-side policies, perhaps the frustrating and restless conditions of the 1970s and 1980s is an open invitation for the application of supply-side policies. If so, the 1980s and 1990s may prove to be the testing era for the supply-side theories. By the end of 1990s we should have better supply-side models and know much more about the effectiveness of supply-side policies. By that time, also, supply-side thinking may be more crystallized and we will learn whether it is something temporary that will fade away, be widely accepted as the new economics replacing Keynesian demand analysis, or something to be continued but melded or fused with demand management.

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미숙과와 성숙과 복분자의 섭취가 복강 Macrophages의 유전자 발현에 미치는 영향 (Effects Unripe and Ripe Rubus coreanus Miquel on Peritoneal Macrophage Gene Expression Using cDNA Microarray Analysis)

  • 이정은;조수묵;김진;김정현
    • 한국식품영양과학회지
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    • 제42권10호
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    • pp.1552-1559
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    • 2013
  • 본 연구에서는 미숙과와 성숙과의 복분자 섭취에 의한 쥐복강 대식세포의 염증반응을 조사하였다. 8주간 농도별 미숙과와 성숙과 복분자 식이를 섭취시킨 후 복강대식세포를 분리한 다음, LPS로 염증반응을 유도하여 염증매개 cytokines인 TNF-${\alpha}$, IL-$1{\beta}$, IL-6의 분비와 PGE2의 분비량을 측정하였으며, cDNA microarray 방법으로 유전자 발현을 측정하였다. 미숙과와 성숙과 복분자 섭취는 TNF-${\alpha}$의 생성을 유의적으로 억제하였으나, IL-$1{\beta}$, IL-6는 미숙과 복분자 섭취에 의해서만 감소하였으며 $PGE_2$의 분비에는 영향을 주지 않았다. 본 연구결과, 미숙과와 성숙과 복분자 섭취에 의해 8개의 유전자 발현이 감소된 것으로 확인되었는데, 이중 세포의 면역반응과 관련된 5-LOX, iNOS, IL-11의 발현이 유의적으로 감소되었으며, 만성질환 특히 심혈관계 질환을 유발하는 인자인 tPA, thrombospondin 1, ceruloplasmin과 암의 성장 및 전이와 관련된 VEGF A의 발현을 유의적으로 억제하였다. 한편 혐기성 관련 유전자의 발현을 억제하는 HIF3A의 발현을 유의적으로 증가시켰다. 또한 미숙과 복분자의 섭취만이 CCL8, CXCL14, PLA2의 발현을 감소시키는 것으로 나타났다. 따라서 복분자의 섭취, 특히 미숙과 복분자의 섭취는 항염증 효과를 보일 뿐 아니라 만성염증성 질환 관련 인자의 발현을 유의적으로 감소시키므로 이와 관련된 기능성 식품 개발에 활용될 수 있을 것으로 사료되며, 추후 복분자내 항염증 효능을 갖는 생리활성 성분에 대한 연구가 더 진행되어야 할 것으로 판단된다.

아토피 피부염 모델에 대한 β-1,3/1,6-glucan과 Lactobacillus plantarum LM1004의 면역 조절 효과 (Immunomodulatory Effects of β-1,3/1,6-glucan and Lactobacillus plantarum LM1004 on Atopic Dermatitis Models)

  • 김인성;김성학;김정아;유다윤;김광일;박동찬;임종민;이상석;최인순;조광근
    • 생명과학회지
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    • 제28권1호
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    • pp.17-25
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    • 2018
  • 본 연구에서는 아토피 피부염 동물 모델에 대한 ${\beta}$-1,3/1,6-glucan과 L. plantarum LM1004의 면역조절 효과를 확인하고자 하였다. 가려움증의 횟수와 유출된 evans blue, 그리고 혈청 IgE와 histamine의 농도는 ${\beta}$-1,3/1,6-glucan과 L. plantarum LM1004를 섭취한 그룹에서 아토피 피부염 유발그룹에 비해 유의적으로 감소하는 결과를 나타내었다. 아토피 피부염이 유발되면 전사 수준에서 Th2 및 Th17 세포의 전사인자 및 cytokine은 과발현되며, ${\beta}$-1,3/1,6-glucan과 L. plantarum LM1004를 섭취하였을 때 이를 유의적으로 감소되었다. 또한 ${\beta}$-1,3/1,6-glucan과 L. plantarum LM1004는 Th1 및 Treg 세포의 전사인자(T-bet, GATA-3, $ROR{\gamma}T$, Foxp3) 및 cytokine (INF-${\gamma}$, IL-4, IL-17, TGF-${\beta}$)의 발현을 증가시킴으로써 면역 균형을 조절하는 것으로 나타났다. Galectin-9과 filaggrin은 아토피피부염 유발 처리군에서 유의적으로 가장 낮았으며, ${\beta}$-1,3/1,6-glucan 처리군에서 유의적으로 가장 높게 나타났다. 이와 반대로 TSLP는 아토피 피부염 유발그룹에서 유의적으로 가장 높았으며 ${\beta}$-1,3/1,6-glucan과 L. plantarum LM1004를 섭취한 그룹은 대조군과 유사한 수준이었다. 이러한 결과를 통해 ${\beta}$-1,3/1,6-glucan과 L. plantarum LM1004는 아토피 피부염 동물 모델에서 면역조절 작용 및 아토피 피부염의 개선 효과를 가짐을 알 수 있었다. 따라서 ${\beta}$-1,3/1,6-glucan과 L. plantarum LM1004는 아토피 피부염에 유용한 천연소재로서 사용될 것으로 기대된다.

Expression of CsRCI2s by NaCl stress reduces water and sodium ion permeation through CsPIP2;1 in Camelina sativa L.

  • Kim, Hyun-Sung;Lim, Hyun-Gyu;Ahn, Sung-Ju
    • 한국작물학회:학술대회논문집
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    • 한국작물학회 2017년도 9th Asian Crop Science Association conference
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    • pp.194-194
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    • 2017
  • Camelina (Camelina sativa L.) is a potential bio-energy crop that has short life cycle about 90 days and contains high amount of unsaturated fatty acid which is adequate to bio-diesel production. Enhancing environmental stress tolerance is a main issue to increase not only crop productivity but also big mass production. CsRCI2s (Rare Cold Inducible 2) are cold and salt stress related protein that localized at plasma membrane (PM) and assume to be membrane potential regulation factor. These proteins can be divide into C-terminal tail (CsRCI2D/E/F/G) or no-tail group (CsRCI2A/B/C/H). However, function of CsRCI2s are less understood. In this study, physiological responses and functional characterization of CsRCI2s of Camelina under salt stress were analyzed. Full-length CsRCI2s (A/B/E/F) and CsPIP2;1 sequences were confirmed from Camelina genome browser. Physiological investigations were carried out using one- or four-week-old Camelina under NaCl stress with dose and time dependent manner. Transcriptional changes of CsRCI2A/B/E/F and CsPIP2;1 were determined using qRT-PCR in one-week-old Camelina seedlings treated with NaCl. Translational changes of CsRCI2E and CsPIP2;1 were confirmed with western-blot using the antibodies. Water transport activity and membrane potential measurement were observed by cRNA injected Xenopus laevis oocyte. As results, root growth rate and physiological parameters such as stomatal conductance, chlorophyll fluorescence, and electrolyte leakage showed significant inhibition in 100 and 150 mM NaCl. Transcriptional level of CsPIP2;1 did not changed but CsRCI2s were significantly increased by NaCl concentration, however, no-tail type CsRCI2A and CsRCI2B increased earlier than tail type CsRCI2E and CsRCI2F. Translational changes of CsPIP2;1 was constitutively maintained under NaCl stress. But, accumulation of CsRCI2E significantly increased by NaCl stress. CsPIP2;1 and CsRCI2A/B/E/F co-expressed Xenopus laevis oocyte showed decreased water transport activity as 61.84, 60.30, 62.91 and 76.51 % at CsRCI2A, CsRCI2B, CsRCI2E and CsRCI2F co-expression when compare with single expression of CsPIP2;1, respectively. Moreover, oocyte membrane potential was significantly hyperpolarized by co-expression of CsRCI2s. However, higher hyperpolarized level was observed in tail-type CsRCI2E and CsRCI2F than others, especially, CsRCI2E showed highest level. It means transport of $Na^+$ ion into cell is negatively regulated by expression of CsRCI2s, and, function of C-terminal tail is might be related with $Na^+$ ion influx. In conclusion, accumulation of NaCl-induced CsRCI2 proteins are related with $Na^+$ ion exclusion and prevent water loss by CsPIP2;1 under NaCl stress.

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Sodium Chloride가 치즈의 품질에 미치는 영향과 저염치즈 개발 기술: 총설 (The Effect of Sodium Chloride on the Quality of Cheese and Upcoming Technologies for Manufacturing Reduced-Sodium Cheeses: A Review)

  • 천정환;김현숙;김동현;김홍석;송광영;정동관;김수기;서건호
    • Journal of Dairy Science and Biotechnology
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    • 제33권1호
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    • pp.47-57
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    • 2015
  • 세계보건기구(World Health Organization)는 식료품에 함유된 NaCl을 낮출 것을 권하고 있으며, 식품 내 NaCl 수치 감소시키는 것은 중요한 연구분야가 되었다. 염화나트륨(sodium chloride, NaCl)의 과다 섭취는 고혈압, 골다공증, 뇌졸증, 신장결석, 심혈관계 질환 등의 다양한 질병과 직접 또는 간접적으로 많은 연관되어 있다. 산업국가에서는 치즈등의 가공식품을 통해 많은 양의 소금을 섭취하고 있기 때문에, 치즈 내 NaCl의 함유량 감소에 대한 연구가 진행 중에 있다. 따라서 최근에 치즈 내 NaCl의 함유량을 감축하기 위한 많은 방법들이 이용되고 있다. NaCl은 치즈 내에서 방부제 역할을 하며, 식품의 풍미를 높이고, 치즈의 주요 기능적 특성을 담당하기 때문에, 치즈의 품질에 영향을 주지 않으면서 치즈에 함유된 NaCl을 감소하는 것은 쉽지 않다. 대체방법을 사용하지 않고, 치즈에 함유된 NaCl을 감축시키는 연구가 진행되어 왔지만, NaCl 감소 시에 발생하는 식품의 관능적 특성, 유동학 및 안정성 문제들이 보고되고 있다. 지금까지의 연구 결과에 의하면 식품 내 NaCl을 감소시키는 방법으로는 NaCl 대체(NaCl substitution)라고 불리는 방법이 있으며, 이 방법은 NaCl을 부분적으로 다른 염분(염화칼륨, 염화마그네슘, 염화칼슘)으로 대체함으로써 식품에 함유된 NaCl 수치를 감소시킨다. 실례로 자연치즈에 함유된 NaCl을 KCl로 대체하였을 때 치즈의 특성, 특히 맛에 변화와 안정선에 문제가 야기되었다. 반면, 가공치즈에 함유된 NaCl을 KCl로 대체하였을 때, 치즈의 특성이 큰 영향을 받지 않았기 때문에, 이 방법을 사용하여 치즈에 함유된 NaCl의 수치를 감소시킬 수 있는 가능성이 높다는 것을 나타냈다. 이와 같은 결과는 자연치즈 내의 NaCl 함량을 감축하기 위해서는 치즈에 함유된 NaCl의 역할, NaCl과 건강문제, NaCl 감소 방법, 다른 염분(특히 염화칼륨으로 NaCl 대체하는 방법)을 사용하는 방법 등에 관한 더 많은 향후 연구가 많이 필요하며, 적극적으로 진행되어야 할 것이다.

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The Contribution of Innovation Activity to the Output Growth of Emerging Economies: The Case of Kazakhstan

  • Smagulova, Sholpan;Mukasheva, Saltanat
    • 유통과학연구
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    • 제10권7호
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    • pp.33-41
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    • 2012
  • The purpose of this study is to analyse the state of the energy industry and to determine the efficiency of its functioning on the basis of energy conservation principle and application of innovative technologies aimed at improving the ecological modernisation of agricultural sectors of Kazakhstan. The research methodology is based on an integrated approach of financial and economic evaluation of the effectiveness of the investment project, based on calculation of elasticity, total costs and profitability, as well as on comparative, graphical and system analysis. The current stage is characterised by widely spread restructuring processes of electric power industry in many countries through introduction of new technical installations of energy facilities and increased government regulation in order to enhance the competitive advantage of electricity market. Electric power industry features a considerable value of creating areas. For example, by providing scientific and technical progress, it crucially affects not only the development but also the territorial organisation of productive forces, first of all the industry. In modern life, more than 90% of electricity and heat is obtained by Kazakhstan's economy by consuming non-renewable energy resources: different types of coal, oil shale, oil, natural gas and peat. Therefore, it is significant to ensure energy security, as the country faces a rapid fall back to mono-gas structure of fuel and energy balance. However, energy resources in Kazakhstan are spread very unevenly. Its main supplies are concentrated in northern and central parts of the republic, and the majority of consumers of electrical power live in the southern and western areas of the country. However, energy plays an important role in the economy of industrial production and to a large extent determines the level of competitive advantage, which is a promising condition for implementation of energy-saving and environmentally friendly technologies. In these circumstances, issues of modernisation and reforms of this sector in Kazakhstan gain more and more importance, which can be seen in the example of economically sustainable solutions of a large local monopoly company, significant savings in capital investment and efficiency of implementation of an investment project. A major disadvantage of development of electricity distribution companies is the prevalence of very high moral and physical amortisation of equipment, reaching almost 70-80%, which significantly increases the operating costs. For example, while an investment of 12 billion tenge was planned in 2009 in this branch, in 2012 it is planned to invest more than 17 billion. Obviously, despite the absolute increase, the rate of investment is still quite low, as the total demand in this area is at least more than 250 billion tenge. In addition, industrial infrastructure, including the objects of Kazakhstan electric power industry, have a tangible adverse impact on the environment. Thus, since there is a large number of various power projects that are sources of electromagnetic radiation, the environment is deteriorated. Hence, there is a need to optimise the efficiency of the organisation and management of production activities of energy companies, to create and implement new technologies, to ensure safe production and provide solutions to various environmental aspects. These are key strategic factors to ensure success of the modern energy sector of Kazakhstan. The contribution of authors in developing the scope of this subject is explained by the fact that there was not enough research in the energy sector, especially in the view of ecological modernisation. This work differs from similar works in Kazakhstan in the way that the proposed method of investment project calculation takes into account the time factor, which compares the current and future value of profit from the implementation of innovative equipment that helps to bring it to actual practise. The feasibility of writing this article lies in the need of forming a public policy in the industrial sector, including optimising the structure of energy disbursing rate, which complies with the terms of future modernised development of the domestic energy sector.

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Microarray와 Network 분석을 통한 병원균 및 스트레스 저항성 관련 주요 유전자의 대량 발굴 (Identification of multiple key genes involved in pathogen defense and multi-stress tolerance using microarray and network analysis)

  • 김형민;문수윤;이진수;배원실;원경호;김윤경;강권규;류호진
    • Journal of Plant Biotechnology
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    • 제43권3호
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    • pp.347-358
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    • 2016
  • 브라시노스테로이드는 식물의 생장과 발육 과정에 있어서 중요한 역할을 담당 할 뿐 아니라 생물학적/ 비 생물학적 스트레스에 대한 복합 저항성을 보인다고 알려져 있다. 따라서 본 연구에서는 브라시노스테로이드와 광범위스트레스 내성을 연결하는 중요한 생물학적 네트워크를 이해하기 위해, Agilent Arabidopsis $4{\times}44K$ oligo chip을 이용하여 브라시노스테로이드 신호가 강화된 bes1-D 계통의 전 전사체 비교분석을 수행하였다. 그 결과 bes1-D 계통에서 DEGs (Differentially Expressed Genes)를 1,091 (562 up-regulated, 529 down-regulated) 개 선발하였다. 또한 선발된 유전자들의 GO 와 단백질 상호작용 네트워크 분석을 통해 대사, 발달, 스트레스, 면역, 방어 반응에 관련된 주요 브라시노스테로이드 신호전달과 연결된 스트레스 관련 유전자군을 분리하였다. 선발된 유전자중 NB-ARC와 FLS2는 bes1-D 계통이 야생형 En-2 계통에 비해 약 6배 정도의 발현량이 증가되었으며, TIR1, TSA1, OCP3 유전자등은 bes1-D 계통이 야생형 En-2 계통에 비해 발현이 감소되었다. 또한 브라시노스테로이드 활성형 계통이 야생형 식물체 계통에 비해 가뭄 스트레스 및 병원균에 대해 저항력이 향상되었다. 따라서 microarray 분석을 통한 유전자 간 발현 네트워크와 유전체 정보를 결합하여 대단위 주요 기능 유전자들을 동정할 수 있는 방법을 고안하여 실험에 사용하였다. 이를 통해 기능 획득 돌연변이 bes1-D가 식물들이 다양한 스트레스 환경에 적응할 수 있는 반응을 조절한다는 사실을 보여주고 있다.

미만형 위암에서 임상병리학적 인자와 Hsp70, BAG1과 Raf-1 발현간의 상관성 (Correlation between Clinicopathology and Expression of HSP70, BAG1 and Raf-1 in Human Diffuse Type Gastric Carcinoma)

  • 정상봉;이현욱;정경태
    • 생명과학회지
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    • 제26권1호
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    • pp.101-108
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    • 2016
  • 본 연구에서는 미만형 위암조직에서의 임상병리학적 인자와 HSP70, BAG1, Raf-1의 발현간의 상관관계를 평가하고자 하였다. Hsp70은 열충격단백질(heat shock protein)의 환경적 스트레스로부터 세포를 보호하는 분자생물학적 chaperone으로 작용하는 것뿐 아니라 anti-apoptotic 작용을 통하여 암세포의 생존과 전이를 촉진시키는 것으로 알려져 있다. Proto-oncogene의 일종인 Raf는 사람을 포함한 진핵세포의 생장에 관여하는 중요한 신호전달경로인 mitogen-activated protein kinase (MAPK)경로의 중심인자로서 다양한 암에서 그 발현이 증가한다고 알려져 있다. Bcl-2에 결합하여 세포사멸을 저해하는 것으로 처음 보고된 Bcl-2-associated athanogene-1 (BAG-1)은 다양한 암에서 그 발현이 증가된다고 보고되었다. 또한 BAG-1은 HSP70과 상호작용하여 Raf-1-ERK signal pathway와 cell growth를 조절하는 것으로 보고되었다. Hsp70의 발현은 임파절 전이가 있는 경우 24례(64.9%)에서 양성, 13례(35.1%)에서 음성을 보였으며, 임파절 전이가 없는 경우 6례(26.1%)에서 양성, 17례(73.9%)에서 음성을 보여 임파절의 전이가 있는 경우가 임파절 전이가 없는 경우에 비해 유의하게 높은 발현율을 보였다(p=0.007). N-stage에 따른 발현은 N-stage가 증가함에 따라 발현율이 유의하게 증가하였다(p=0.006). BAG1의발현은 전체 대상 환자 중 43례(71.7%)에서 양성, 17례(28.3%)에서 음성소견을 보였으며, 65세 미만에서 65세 이상에 비해 유의하게 높은 발현율을 보였다(p=0.035). RAF1의 경우 전체 대상 환자 중 45례(75.0%)에서 양성, 15례(25.0%)에서 음성소견을 보였으며, BAG1 양성환자에서 RAF1의 발현이 유의하게 증가 하였다(p=0.021). 본연구 결과 Hsp70은 종양의 진행과 상관성이 있을 것으로 생각되어지며, BAG1과 Raf-1은 미만형위 암의 진단적 마커로 유용할 것으로 사료된다.

저항성 운동이 골격근 유전자 발현에 미치는 영향: Beadarray 분석 (Effect of Resistance Training on Skeletal Muscle Gene Expression in Rats: a Beadarray Analysis)

  • 오승렬;오상덕
    • 생명과학회지
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    • 제23권1호
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    • pp.116-124
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    • 2013
  • 본 연구의 목적은 저항성 운동 후 골격근에서 저항성 관련 유전자를 규명하는 것이다. 연구 목적을 달성하기 위하여 총 32두의 Sprague-Dawley계 수컷 흰쥐를 분양 받은 후 4주차 통제군(4 wks CON, n=8), 8주차 통제군(8 wks CON, n=8), 4주차 운동군(4 wks REG, n=8), 8주차 운동군(8 wks REG, n=8)으로 집단을 분류하였다. 저항성 운동군은 꼬리에 무게를 달고 동물용 사다리(1-m vertical, 85 degree incline)를 오르는 저항성 사다리 운동을 1회 10번, 주당 3일, 4주와 8주간 점증적으로 실시하였으며, 골격근 조직은 저항성 운동 후 장무지굴근(flexor hallucis longus; FHL)을 적출하여 분석에 이용하였다. 적출한 골격근에서 total RNA를 분류한 후, 대규모 유전자 발현분석을 위하여 Illumina RatRef-12 Expression BeadChip을 이용한 Beadarray를 시행하였으며, Beadarray 결과를 확인하기 위해 qPCR (real-time quantitative PCR)를 실시하였다. 유의성 검증은 Beadstudio software를 이용하여 실시하였으며, Beadarray 데이터 중 Detection p-value to <0.01, M-value {M= $log_2$ (condition)-$log_2$ (reference)} to >1.0, DiffScore to >20인 유전자만을 통계적으로 의미 있는 유전자로 선택하였다. 4주차 저항성 운동 후 통제집단에 비해 2배 이상 유의하게 발현이 증가한 유전자는 30개였으며, 6개의 유전자가 감소하였다. 8주차 저항성 운동 후에는 5개의 유전자가 발현이 증가하였으며, 12개의 유전자가 유의하게 감소하였다. 연구결과 다음의 유전자를 포함한 저항성 운동과 근비대와 관련 후보 유전자를 도출하였다; 1) 세포 성장 조절(IGFBP1, PLA2G2A, OKL38); 2) 근육발생(CSRP3); 3) 조직 재생과 근육 발달(MUSTN1, MYBPH); and 4) 비대 모델(CYR61, ATF3, NR4A3); and 5) 당대사(G6PC, PCK1). 이러한 연구결과는 차후 저항성 운동과 관련된 다양한 생리학적 변인을 연구하는데 있어서 기초 자료를 제공할 것으로 생각된다.