SUBTRACTIVE CDNA CLONING USING OLIGO(DT)30-LATEX AND PCR - ISOLATION OF CDNA CLONES SPECIFIC TO UNDIFFERENTIATED HUMAN EMBRYONAL CARCINOMA-CELLS

被引:116
作者
HARA, E
KATO, T
NAKADA, S
SEKIYA, S
ODA, K
机构
[1] SCI UNIV TOKYO,DEPT APPL BIOL SCI,NODA,CHIBA 278,JAPAN
[2] ST MARIANNA MED UNIV,SCH MED,INST MED SCI,KAWASAKI 216,JAPAN
[3] CHIBA UNIV,SCH MED,DEPT OBSTET & GYNAECOL,CHIBA 280,JAPAN
[4] SCI UNIV TOKYO,DEPT BIOL SCI & TECHNOL,NODA,CHIBA 278,JAPAN
关键词
D O I
10.1093/nar/19.25.7097
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
The human embryonal carcinoma cell line NEC14 can be induced to differentiate by the addition of 10(-2)M N,N'-hexamethylene-bis-acetamide (HMBA). A subtractive cDNA library specific to undifferentiated NEC14 cells was constructed using oligo(dT)30-Latex and polymerase chain reaction (PCR). The method was designed to improve the efficiency of subtraction and the enrichment of cDNA clones corresponding to low abundance mRNAs. The single strand of cDNA was made from mRNA prepared from the HMBA-treated NEC14 cells using an oligo(dT)30 primer covalently linked to Latex particles. After removal of the mRNA template by heat-denaturation and centrifugation, the subtractive hybridization was carried out between the cDNA-oligo(dT)30-Latex and mRNA from untreated NEC14 cells. Unhybridized mRNA collected by centrifugation was hybridized repeatedly to the cDNA-oligo(dT)30-Latex and subtractive mRNA was converted to cDNA. The subtractive cDNA was then amplified by PCR and cloned into pBluescript II KS-. The cDNA library thus constructed consisted of approximately 10,000 independent clones with cDNA inserts of 1.7 Kb on average. Differential hybridization of these transformants indicated that approximately 3% of them contained cDNA inserts specific to the undifferentiated EC cells, some of which were derived from low abundance mRNAs.
引用
收藏
页码:7097 / 7104
页数:8
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