• 과학기술학연구
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• 제5권1호
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• pp.93-123
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• 2005

이 글은 서로 층위가 다른 제 사회세력들이 시험관아기 시술을 매개로 어떤 방식으로 여성의 재생산권과 모성의 의미를 구성하는지를 밝히고, 시험관아기 시술을 통해 부상하게 된 기술과학주체(technoscientific subject)인 여성은 어떤 위치에 놓여있는지를 논의하는 것을 목적으로 한다. 연구방법은 문헌연구와 심층면접으로써, 과학기술 연구와 페미니즘 관련 문헌들과 심층면접 자료, 불임여성모임 단체와 입양단체의 문건과 회원들이 올린 글들, 언론매체의 기사와 칼럼들을 이용하였다. 불임여성의 경험을 가족 체계, 의료 체계, 그리고 국가 체계를 통해 본 결과는 다음과 같다. 가족의 공간에서 불임여성은 비정상의 범주에 속해질 뿐 아니라 스스로도 자신의 여성성에 의문을 갖지만, 다른 한편 "모성"에 대한 성찰과 확장된 인식을 갖게 되는 계기를 마련하기도 하였다. 의료 공간에서 불임여성은 자신의 몸이 자신 가족, 의료진에게 각기 달리 인식된다는 사실을 경험하게 된다. 몸을 소유한 것도, 소유된 것도 아닌 것으로 인식하는 이 시선은 교환과 거래가 주도하는 공간에 새로운 논리의 창출과 새로운 기술과학주체의 행위성을 예견하게 한다. 국가의 공간에서 배아복제 연구가 국가경쟁력의 기표로 부상함에 따라 난자제공자로서의 여성의 위치도 정치성을 띄게 됐다. 여성은 한편으론 국가발전에 참여할 국민으로 호명되지만 다른 한편으론 "생명"의 존엄성이라는 허구를 지키는 수호자의 역할을 할 것을 요구받는 모순된 위치에 놓여있다. 국가의 경제발전을 위한 기획에 호명되면서 경제적 보상의 범주에는 들지 못하는 국민이라는 정체성과, 생명을 파괴하는 것을 전제로 생명을 창조하는 것을 허락하는 배아복제에 참여하면서 "생명" 수호자의 정체성을 부여받는 것이 각기 내포하는 모순에 대해 여성이 어떻게 순을하고 타협하고 저항할지에 따라 배아복제 연구의 방향과 속도가 달라질 것이다.

• 한국수정란이식학회지
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• 제23권2호
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• pp.67-76
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• 2008

Since the birth of Dolly using fully differentiated somatic cells as a nuclear donor, viable clones were generated successfully in many mammalian species. These achievements in animal cloning demonstrate developmental potential of terminally differentiated somatic cells. At the same time, the somatic cell nuclear transfer (SCNT) technique provides the opportunities to study basic and applied biosciences. However, the efficiency generating viable offsprings by SCNT remains extremely low. There are several explanations why cloned embryos cannot fully develop into viable animals and what factors affect developmental potency of reconstructed embryos by the SCNT technique. The most critical and persuasive explanation for inefficiency in SCNT cloning is incomplete genomic reprogramming, such as DNA methylation and histone modification. Numerous studies on genomic reprogramming demonstrated that incorrect DNA methylation and aberrant epigenetic reprogramming are considerably correlated with abnormal development of SCNT cloned embryos even though its mechanism is not fully understood. The SCNT technique is useful in cloning farm animals because pluripotent stem cells are not established in farm animal species. Therapeutic cloning combined with genetic manipulation will help to control various human diseases. Also, the SCNT technique provides a chance to overcome excessive demand for the organs by production of transgenic animals as xenotransplantation resources. Here, we describe the factors affecting the efficiency of generating cloned farm animals by the SCNT technique and discuss future directions of animal cloning by SCNT to improve the cloning efficiency.

• 과학기술학연구
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• 제5권1호
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• pp.125-148
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• 2005

본 논문은 황우석 교수의 2005년 5월 배아줄기세포 연구성과 발표에 대한 인터넷상의 공론이 어떻게 이루어졌는지를 통해 일반 공중의 배아복제에 대한 이해를 연구한다. 인터넷 공론에 대한 분석은 일반화의 어려움은 있지만 질적 연구의 장점이 있다는 점을 분명히 하면서 사례연구를 하였다. 5월 20일 주요 신문은 연구성과의 세계적인 의의와 더불어 난치병 치료를 위한 연구로 자리매김을 만들었으며 윤리문제를 부각하는 데서 약간의 차이를 보였다. 그런 영향으로 인터넷상에서는 훨씬 더 분명한 형태로 환호하는 분위기를 보였다. 네이버 게시판은 연구성과에 대한 열광과 더불어 윤리문제제기를 비판하는 경향을 띠었고 연구의 정당성을 묻는 민주노동당에 대해서는 보다 애국주의적 국가주의적 근거에서, 가톨릭의 반대성명에 대해서는 배아는 생명이 아니며 낙태 등이 일상화된 현실적 근거에서 비판되었다.

• 대한생식의학회:학술대회논문집
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• 대한불임학회 2005년도 제48차 춘계 학술대회
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• pp.120-120
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• 2005

• 한국발생생물학회:학술대회논문집
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• 한국발생생물학회 2003년도 제3회 국제심포지움 및 학술대회
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• pp.7-8
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• 2003

Since it was first reported in 1997, somatic cell cloning has been demonstrated in several other mammalian species. On the mouse, it can be cloned from embryonic stem (ES) cells, fetus-derived cells, and adult-derived cells, both male and female. While cloning efficiencies range from 0 to 20%, rates of just 1-2% are typical (i.e. one or two live offspring per one hundred initial embryos). Recently, abnormalities in mice cloned from somatic cells have been reported, such as abnormal gene expression in embryo (Boiani et al., 2001, Bortvin et al., 2003), abnormal placenta (Wakayama and Yanagimachi 1999), obesity (Tamashiro et ai, 2000, 2002) or early death (Ogonuki et al., 2002). Such abnormalities notwithstanding, success in generating cloned offspring has opened new avenues of investigation and provides a valuable tool that basic research scientists have employed to study complex processes such as genomic reprogramming, imprinting and embryonic development. On the other hand, mouse ES cell lines can also be generated from adult somatic cells via nuclear transfer. These 'ntES cells' are capable of differentiation into an extensive variety of cell types in vitro, as well assperm and oocytes in vivo. Interestingly, the establish rate of ntES cell line from cloned blastocyst is much higher than the success rate of cloned mouse. It is also possible to make cloned mice from ntES cell nuclei as donor, but this serial nuclear transfer method could not improved the cloning efficiency. Might be ntES cell has both character between ES cell and somatic cell. A number of potential agricultural and clinical applications are also are being explored, including the reproductive cloning of farm animals and therapeutic cloning for human cell, tissue, and organ replacement. This talk seeks to describe both the relationship between nucleus donor cell type and cloning success rate, and methods for establishing ntES cell lines. (중략)

• 한국수정란이식학회:학술대회논문집
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• 한국수정란이식학회 2004년도 제4회 발생공학 국제심포지움 및 학술대회
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• pp.32-32
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• 2004

• Journal of Microbiology and Biotechnology
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• 제23권3호
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• pp.430-435
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• 2013

Multidrug resistance, especially multidrug efflux mechanisms that extrude structurally unrelated cytotoxic compounds from the cell by multidrug transporters, is a serious problem and one of the main reasons for the failure of therapeutic treatment of infections by pathogenic microorganisms as well as of cancer cells. Streptococcus mutans is considered one of the primary causative agents of dental caries and periodontal disease, which comprise the most common oral diseases. A fragment of chromosomal DNA from S. mutans KCTC3065 was cloned using Escherichia coli KAM32 as host cells lacking major multidrug efflux pumps. Although E. coli KAM32 cells were very sensitive to many antimicrobial agents, the transformed cells harboring a recombinant plasmid became resistant to several structurally unrelated antimicrobial agents such as tetracycline, kanamycin, rhodamin 6G, ampicillin, acriflavine, ethidium bromide, and tetraphenylphosphonium chloride. This suggested that the cloned DNA fragment carries a gene encoding a multidrug efflux pump. Among 49 of the multidrug-resistant transformants, we report the functional gene cloning and characterization of the function of one multidrug efflux pump, namely MdeA from S. mutans, which was expressed in E. coli KAM32. Judging from the structural and biochemical properties, we concluded that MdeA is the first cloned and characterized multidrug efflux pump using the proton motive force as the energy for efflux drugs.

• 한국응용약물학회:학술대회논문집
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• 한국응용약물학회 2001년도 추계학술대회 및 정기총회
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• pp.110-110
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• 2001

Histone deacetylase(HDAC), a neuclear enzyme that regulates gene trascription and the assembly of newly synthesized chromatin, has received much attention in recent literature. The explosion of activity in this field has yielded the cloning of a mammalian gene which encodes a complementary histone acetyl trasferases. Several cyclic tetrapeptide inhibitors of HDAC has been reported to affect the hyperacetylation of mammalian and plant histones. Apicidin, a natural product HDAC inhibitor recently isolated at Merck Research Laboratories, induces therapeutic applications as a broad spectrum antiprotozoal agent to multi-drug resistant malaria and a potential antitumor agnet. The biological activity of apicidin appears to be attributable to inhibition of apicocomplexan HDAC at low nanomolar concentrations.

• Asian-Australasian Journal of Animal Sciences
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• 제25권3호
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• pp.421-427
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• 2012

The production of therapeutic proteins from transgenic animals is one of the most important successes of animal biotechnology. Milk is presently the most mature system for production of therapeutic proteins from a transgenic animal. Specifically, ${\beta}$-casein is a major component of cow, goat and sheep milk, and its promoter has been used to regulate the expression of transgenic genes in the mammary gland of transgenic animals. Here, we cloned the porcine ${\beta}$-casein gene and analyzed the transcriptional activity of the promoter and intron 1 region of the porcine ${\beta}$-casein gene. Sequence inspection of the 5'-flanking region revealed potential DNA elements including SRY, CdxA, AML-a, GATA-3, GATA-1 and C/EBP ${\beta}$. In addition, the first intron of the porcine ${\beta}$-casein gene contained the transcriptional enhancers Oct-1, SRY, YY1, C/EBP ${\beta}$, and AP-1, as well as the retroviral TATA box. We estimated the transcriptional activity for the 5'-proximal region with or without intron 1 of the porcine ${\beta}$-casein gene in HC11 cells stimulated with lactogenic hormones. High transcriptional activity was obtained for the 5'-proximal region with intron 1 of the porcine ${\beta}$-casein gene. The ${\beta}$-casein gene containing the mutant TATA box (CATAAAA) was also cloned from another individual pig. Promoter activity of the luciferase vector containing the mutant TATA box was weaker than the same vector containing the normal TATA box. Taken together, these findings suggest that the transcription of porcine ${\beta}$-casein gene is regulated by lactogenic hormone via intron 1 and promoter containing a mutant TATA box (CATAAAA) has poor porcine ${\beta}$-casein gene activity.

• Current Research on Agriculture and Life Sciences
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• 제28권
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• pp.63-68
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• 2010

The epigenetic therapy of cancers is emerging as an effective and valuable approach to both chemotherapy and the chemoprevention of cancer. The utilization of epigenetic targets that include histone methyltransferase (HMTase), Histone deacetylatase, and DNA methyltransferase, are emerging as key therapeutic targets. SET containing proteins such as the HMTase Setd1b has been found significantly amplified in cancerous cells. In order to shed some light on the histone methyl transferase family, we cloned the Setd1b gene from Mus musculus and build a collection of vectors for recombinant protein expression in E.coli that will pave the way for further structural biology studies. We prospect the role of the Setd1b pathway in cancer therapy and detail its unique value for designing novel anti-cancer epigenetic-drugs.