Stability of transferred human chromosome fragments in cultured cells and in mice

被引:47
作者
Shinohara, T
Tomizuka, K
Takehara, S
Yamauchi, K
Katoh, M
Ohguma, A
Ishida, I
Oshimura, M
机构
[1] Tottori Univ, Fac Med, Sch Life Sci, Dept Mol & Cell Genet, Tottori 6838503, Japan
[2] JST, CREST, Tottori 6838503, Japan
[3] Kirin Brewery Co Ltd, Pharmaceut Res Lab, Gunma 3701295, Japan
关键词
chromosome stability; ES cell; human artificial chromosome (HAC); trans-chromosomic mouse;
D O I
10.1023/A:1026741321193
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Chromosome fragments represent feasible gene delivery vectors with the use of microcell-mediated chromosome transfer. To test a prerequisite for a gene delivery vector, we examined the stability of human chromosome fragments (hCFs) in cultured cells and in trans-chromosomic (Tc) mice. Fragments of human chromosomes 2 (hCF(2-W23)), 11 (hCF-11) and 14 (hCF(SC20)) tagged with neo were introduced into the TT2F mouse ES cells, and retention of the hCFs was examined by FISH during long-term culture without selection. In contrast to the gradual loss of hCF(2-W23) and hCF-11, hCF(SC20) remained stable over 70 population doublings in the ES cells. The hCF(SC20) was also stable in cultured human tumor cells and chicken DT40 cells. We have previously generated chimeric mice using the ES cells harboring the hCF(2-W23) or hCF(SC20), followed by production of Tc mice. Although both the hCF(2-W23) and hCF(SC20) persisted in cells of Tc mice as an additional chromosome and were transmitted to offspring, the hCF(SC20) was more stable than the hCF(2-W23) in F1 and F2 mice. The present study shows that the stability of hCFs in Tc mice differs with tissue types and with genetic background used for successive breedings. Thus, the hCF(SC20), which was relatively stable in both mouse and human cells, may be a promising candidate for development as a gene delivery vector.
引用
收藏
页码:713 / 725
页数:13
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