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A Potential Demerit of the Pronuclear Microinjection Technique
왕애국,김선욱,문형배,현병화,남기환,서준교,김남순,유대열,이동석,Wang, Ai-Guo,Kim, Sun-Uk,Moon, Hyung-Bae,Hyun, Byung-Hwa,Nam, Ki-Hoan,Suh, Jun-Gyo,Kim, Nam-Soon,Yu, Dae-Yeul,Lee, Dong-Seok Korean Society of Life Science 2006 생명과학회지 Vol.16 No.4
Pronuclear microinjection (PMI) is a primary method for producing transgenic mice and offers a powerful tool for investigating gene function in vivo. The method has several reported advantages and disadvantages. Here, we report another potential shortcoming. The survival rate of fertilized one cell-stage embryos was significantly reduced after PMI procedure (65.4% (1202/1838)). In addition, the proportion of embryos developing to full-term was also significantly lower than that of embryos not undergoing PMI (26.5% (319/1202) vs 41.9% (57/136)). Moreover, 3 out of 21 (14.3%) founder control mice which were non-transgene-carrying littermates of transgenic founders showed histopathological changes in their liver, which was comparable to that in of transgenic lineages (4 out of 27 (14.8%)). In conclusion, the mechanical damages in chromosomes occurring during PMI procedure may be a potential factor influencing phenotypes of transgenic mice. 현재, 유전자의 in vivo 기능을 연구하기 위해 가장 많이 이용되고 있는 transgenic mice를 생산하기 위한 기본적으로 이용되고 있는 방법이 one cell-stage embryo에 pronuclear microinjection (PMI)이다. 그러나, 이 PMI 후에 one cell-stage embryo들의 생존율은 현저히 감소 (65.4%)할 뿐만 아니라 PMI 후의 embryo의 출생률(26.4%)이 PMI 처리를 하지 않은 것 (41.9%) 보다 현저히 낮다. 더욱이, PMI 방법에 의해 태어난 transgenic founder들의 간 조직에 병리학적 변화가 14.8% 정도에 대해서 같은 한배의 새끼 non-transgenic founder들의 경우도 간 조직에 병리학적 변화가 14.3%로 나타났다. 결론적으로, 이 PMI 방법에 의한 염색체에 물리적 손상은 형질전환 마우스의 생산 및 표현형에 영향을 미치는 잠재적 요소로 생각된다.
성제경,윤영민,박지영,오승현,도선길,진희경,현병화,서준교,오양석,Seong, Je-Kyung,Yun, Young-min,Park, Ji-young,Oh, Seung-hyun,Do, Seon-gil,Jin, Hee-kyung,Hyun, Byung-hwa,Suh, Jun-gyo,Oh, Yang-seok 대한수의학회 1999 大韓獸醫學會誌 Vol.39 No.5
The morphometrical characteristics such as external measurements and mandible size assessment in mice and rats have to be highly heritable and sufficiently variable between strains in order to calculate a strain specific profiles. The coat color of Korean wild rats were observed and morphometric analysis of external measurements were carried out on Korean wild rats compared to laboratory strains in order to clarify the genetic characteristics of Korean wild rats and to establish background data as a domestication of Korean wild rats for new laboratory strain. Korean wild rats were captured from Chunchon and Hoengsong. 4 inbred and 1 outbred strains of rats were used in this study for the comparison of genetic characteristic of Korean wild rats. Total body length, head length, tail length, hind foot length and ear length were measured and then statistical analysis were carried out by discrimiant analysis. The coat color of Korean wild rat showed golden white in ventral portion and dark agouti in dorsal portion. Korean wild rats could be distinguished from the other laboratory strains distinctly by morphogenetical analysis. There was significant variations among Korean wild rat compared to those of the other laboratory strains of rat. This study may provide that Korean wild rats have a unique genetic characterization compared to those of other inbred strains of rats based on morphogenetical characteristics by external measurements.
A Case of Natural Mycoplasmosis in Spontaneously Hypertensive Rats
노인순,오승현,박지영,최경철,한정희,진희경,도선길,서준교,오양석,박성준,성제경,Roh, In-Soon,Oh, Seung Hyun,Park, Ji Young,Choi, Kyung-Chul,Han, Jeong-Hee,Jin, Hee-Kyung,Do, Seon Gil,Suh, Jun Gyo,Oh, Yang Seok,Park, Seong-Jun,Seong, Je- The Korean Society of Veterinary Science 2001 大韓獸醫學會誌 Vol.41 No.4
SHR 랫드 4-21 개월령 colony에서 혈청 및 조직학적으로 정기적인 health monitoring을 실시하던 중 ELISA test에서 21 개체 중 12 개체에서 Mycoplasma pulmonis에 대한 항체가 검출되었다. Mycoplasma 양성 개체군의 부검 소견에서 기관지, 세기관지 주변 림프절의 증식과 전형적인 폐 기관지의 병변 소견을 보였다. 혈청학적 검사와 조직학적 소견에서 SHR 랫드 군의 자연적인 Mycoplasm 감염 예로 진단되어 보고하는 바이다. Twenty one Spontaneously Hypertensive Rats(SHR) that were 4- to 21-month-old were examined histopathologically and serologically during a routine health monitoring of the rat colony. The results of the enzyme linked immunosorbent assay(ELISA) for murine pathogens demonstrated that 14 of 21 SHR rats had antibodies to Mycoplasma pulmonis. Histopathologically, the mycoplasma positive SHR rats were observed to have the typical pulmonary lesions which are characterized by the hyperplasia of the lymphoid tissue around the bronchi, bronchioles and vessels. Based on the histopathological findings and serological results, this case was diagnosed as a murine mycoplasmosis of SHR rats.