Introduction and expression of a fetal human globin gene in mouse fibroblasts.
An 8.5-kilobase segment of cloned human DNA including the complete G gamma-globin gene was introduced into LMTK- cells by the calcium phosphate precipitation method in the presence or absence of carrier DNA. Transfectants containing one or more copies of intact G gamma-globin genes were obtained either by ligation of the human DNA segment to a plasmid containing the herpes simplex virus thymidine kinase gene or by nonligated cotransfer. The integrity of the integrated gamma-globin gene was established by Southern blotting experiments. Expression of the herpes simplex virus thymidine kinase and human gamma-globin genes was evaluated by Northern blotting and solution hybridization. Of 23 transfectants analyzed, 21 produced a 9S gamma-globin RNA migrating like authentic gamma-globin mRNA on denaturing agarose gels. The gamma-globin RNA is polyadenylated and present in the cytoplasm of the transfected cells; it accumulates to a level 10 times that of thymidine kinase mRNA, or about 5 to 50 molecules per transfected cell. By using plasmids in which the gamma-gene is inserted in either transcriptional orientation with respect to the thymidine kinase gene, it was possible to show that transcription occurred from the gamma-gene promoter.
D000818:Animals; D003001:Cloning, Molecular; D004247:DNA / Q000235:genetics; D004274:DNA, Recombinant; D005333:Fetus / Q000378:metabolism; D005786:Gene Expression Regulation; D005914:Globins / Q000235:genetics*; D006801:Humans; D007739:L Cells; D051379:Mice; D009693:Nucleic Acid Hybridization; D011061:Poly A / Q000032:analysis; D012313:RNA / Q000235:genetics; D018139:Simplexvirus / Q000235:genetics; D013937:Thymidine Kinase / Q000235:genetics; D014162:Transfection
D004274:DNA, Recombinant; D011061:Poly A; D012313:RNA; D005914:Globins; D004247:DNA; D013937:Thymidine Kinase