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- 저자 : 한규동 (검색결과 61 건)
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DNA methylation of mobile genetic elements in human cancers
한규동,이정남,김희수,양광모,이주미 한국유전학회 2013 Genes & Genomics Vol.35 No.3
Mobile genetic elements are responsible for half of the human genome, creating the host genomic instability or variability through several mechanisms. Two types of abnormal DNA methylation in the genome, hypomethylation and hypermethylation, are associated with cancer progression. Genomic hypermethylation has been most often observed on the CpG islands around gene promoter regions in cancer cells. In contrast, hypomethylation has been observed on mobile genetic elements in the cancer cells. It is recently considered that the hypomethylation of mobile genetic elements may play a biological role in cancer cells along with the DNA hypermethylation on CpG islands. Growing evidence has indicated that mobile genetic elements could be associated with the cancer initiation and progression through the hypomethylation. Here we review the recent progress on the relationship between DNA methylation and mobile genetic elements, focusing on the hypomethylation of LINE-1 and HERV elements in various human cancers and suggest that DNA hypomethylation of mobile genetic elements could have potential to be a new cancer therapy target in the future.
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한규동,하정수,이우석,문세영,김윤지 한국유전학회 2016 Genes & Genomics Vol.38 No.2
The human genome has various genomic structural variations such as insertion/deletions between human individuals. These structural variations have led to genomic fluidity and rearrangements in individuals and populations. To investigate Korean-specific structural genomic variations, we performed next generation sequencing with 309 mean coverage from 27 Korean individuals using illumina-HiSeq 2000 platform. We collected a total of 119 deletion loci as transposable elementmediated Korean-specific deletion (KSD) candidates. Of the 119 loci, 35 were filtered out due to computational overlapping regions. A total of 78 loci were validated by PCR amplification with 27 Korean individuals and 80 human individuals from four different populations. We confirmed deletion breakpoints of the 78 loci using Sanger sequencing. We also investigated different deletion mechanisms based on sequencing alignment analysis. We found at least one KSD locus in 80 human individual panel. It has not been previously reported in human genomes. Here, for the first time, we report transposable element-mediated KSD study based on whole genome sequencing data of 27 Korean.
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벤처기업 창업가의 특성과 경영전략이 경영성과에 미치는 영향
한규동 한국벤처창업학회 2019 벤처창업연구 Vol.14 No.6
This paper empirically analyzed the relationship between the characteristics of venture business founders and management performance, setting the management strategy as a parameter to provide a suggestion for the survival and development of venture companies that play an important role in the national economy and job creation. Previous studies in Korea have analyzed the relationship between the characteristics of business founders, management strategies and management performance in a single dimension. This paper, however, explained the business performance of a company from a multi-dimensional perspective while setting the characteristics of business founders as independent variables and setting the business strategy of the enterprise as a parameter. The first result of the analysis shows that the characteristics of venture business founders have a positive effect on business performance. In particular, among the characteristics of venture business founders, a progressive spirit has had the greatest impact on business performance. On the other hand, the influence of risk sensitivity was very weak. Second, the characteristics of venture business founders were found to have a positive effect on business strategy. In particular, innovation was an important variable that affected the technological innovation differentiation strategy, and a progressive spirit was the most influential factor in the marketing differentiation strategy. Third, management strategies of venture firms were found to have a positive effect on business performance. In particular, the technology innovation differentiation strategy has a greater impact on business performance than the marketing differentiation strategy. Fourth, it was revealed that management strategy partially has a mediated effect on the relationship between the characteristics of venture business founders and management performance. In other words, it was found that the characteristics of the founders have a direct impact on business performance but if it is linked to management strategy it has an indirect effect on business performance. The results of this study show that business performance improves when venture business founders' personal characteristics and the firms’ management strategy are combined. 본 연구에서는 국가경제와 일자리 창출에 중요한 역할을 수행하고 있는 벤처기업의 생존 및 발전에 시사점을 제시하고자 벤처기업 창업가의 특성과 경영성과와의 관계에 경영전략을 매개변수로 하여 실증분석을 하였다. 기존의 국내 선행연구들이 창업가의 특성과 경영전략을 경영성과에 대한 동일한 단일차원의 함수관계로 분석하는데서 벗어나서, 창업가의 특성을 독립변수로, 기업차원의 경영전략을 매개변수로 하여 다차원적인 관점에서 기업의 경영성과를 설명하려고 하였다. 분석결과는 첫째, 벤처 창업가의 특성은 경영성과에 정(+)의 영향을 미치는 것으로 나타났다. 특히, 창업가의 특성 중에서도 진취성이 경영성과에 미치는 영향력이 가장 큰 변수로 확인되었다. 반면, 위험감수성은 그 영향력이 상대적으로 매우 미미한 수준으로 분석되었다. 둘째, 벤처 창업가의 특성은 경영전략에 정(+)의 영향을 미치는 것으로 나타났다. 특히, 창업가 특성 중에서 혁신성은 기술혁신 차별화 전략에, 진취성은 마케팅 차별화 전략에 가장 큰 영향을 주는 중요한 변수로 분석되었다. 셋째, 벤처기업의 경영전략은 경영성과에 정(+)의 영향을 미치는 것으로 나타났다. 특히, 경영전략 중에서도 기술혁신 차별화전략이 마케팅 차별화 전략에 비해 경영성과에 미치는 영향력이 큰 것으로 분석되었다. 넷째, 벤처 창업가의 특성과 경영성과와의 관계에서 경영전략은 부분 매개효과가 있는 것으로 나타났다. 즉, 창업가의 특성은 경영성과에 직접적인 영향을 미치기도 하지만 경영전략과 매개되어 경영성과에 간접적인 영향을 미치는 것으로 밝혀졌다. 이런 연구결과는 벤처기업 창업가의 개인적인 특성과 기업차원의 경영전략이 연계되었을 때 더 극대화된 경영성과를 이룰 수 있다는 것을 시사해준다.
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