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. 1990 Mar;9(3):849–855. doi: 10.1002/j.1460-2075.1990.tb08182.x

Extinction of Ig genes expression in myeloma x fibroblast somatic cell hybrids is accompanied by repression of the oct-2 gene encoding a B-cell specific transcription factor.

Y Bergman 1, B Strich 1, H Sharir 1, R Ber 1, R Laskov 1
PMCID: PMC551745  PMID: 2107075

Abstract

In most instances, fusion of differentiated cell types with fibroblasts has resulted in the extinction of differentiation-specific traits of the nonfibroblast parental cell. To explore the genetic basis of this phenomenon, we have used a series of somatic cell hybrids between myeloma cells and fibroblasts. Previous findings show that in these hybrids expression of the immunoglobulin (Ig) genes was extinguished at the transcriptional level. Our present results show that NF-kappa B transcription factor, known to be critical for kappa-chain enhancer activity, is present although in a lower amount, in the nucleus and in the cytosolic fraction of most of these hybrids (probably attached to the previously postulated I-kappa B inhibitor). In contrast, the expression of the NF-A2/OTF-2 transcription factor encoded by the oct-2 gene, which binds to the octameric motif located in the Ig promoters and heavy chain gene enhancer, is extinguished at the transcriptional level. Our data thus suggest that extinction of Ig genes expression occurs via an indirect mechanism in which a fibroblast factor suppresses transcription factor(s) which are critical for Ig transcription.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Baeuerle P. A., Baltimore D. Activation of DNA-binding activity in an apparently cytoplasmic precursor of the NF-kappa B transcription factor. Cell. 1988 Apr 22;53(2):211–217. doi: 10.1016/0092-8674(88)90382-0. [DOI] [PubMed] [Google Scholar]
  2. Baeuerle P. A., Baltimore D. I kappa B: a specific inhibitor of the NF-kappa B transcription factor. Science. 1988 Oct 28;242(4878):540–546. doi: 10.1126/science.3140380. [DOI] [PubMed] [Google Scholar]
  3. Bergman Y., Rice D., Grosschedl R., Baltimore D. Two regulatory elements for immunoglobulin kappa light chain gene expression. Proc Natl Acad Sci U S A. 1984 Nov;81(22):7041–7045. doi: 10.1073/pnas.81.22.7041. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Bertolotti R., Weiss M. C. Expression of differentiated functions in hepatoma cell hybrids. VI. Extinction and re-expression of liver alcohol dehydrogenase. Biochimie. 1972;54(2):195–201. doi: 10.1016/s0300-9084(72)80104-4. [DOI] [PubMed] [Google Scholar]
  5. Bohmann D., Keller W., Dale T., Schöler H. R., Tebb G., Mattaj I. W. A transcription factor which binds to the enhancers of SV40, immunoglobulin heavy chain and U2 snRNA genes. Nature. 1987 Jan 15;325(6101):268–272. doi: 10.1038/325268a0. [DOI] [PubMed] [Google Scholar]
  6. Clerc R. G., Corcoran L. M., LeBowitz J. H., Baltimore D., Sharp P. A. The B-cell-specific Oct-2 protein contains POU box- and homeo box-type domains. Genes Dev. 1988 Dec;2(12A):1570–1581. doi: 10.1101/gad.2.12a.1570. [DOI] [PubMed] [Google Scholar]
  7. Coffino P., Knowles B., Nathenson S. G., Scharff M. D. Suppression of immunoglobulin synthesis by cellular hybridization. Nat New Biol. 1971 May 19;231(20):87–90. doi: 10.1038/newbio231087a0. [DOI] [PubMed] [Google Scholar]
  8. Davidson R. L. Gene expression in somatic cell hybrids. Annu Rev Genet. 1974;8:195–218. doi: 10.1146/annurev.ge.08.120174.001211. [DOI] [PubMed] [Google Scholar]
  9. Davidson R., Ephrussi B., Yamamoto K. Regulation of melanin synthesis in mammalian cells, as studied by somatic hybridization. I. Evidence for negative control. J Cell Physiol. 1968 Oct;72(2):115–127. doi: 10.1002/jcp.1040720206. [DOI] [PubMed] [Google Scholar]
  10. Davis F. M., Adelberg E. A. Use of somatic cell hybrids for analysis of the differentiated state. Bacteriol Rev. 1973 Jun;37(2):197–214. doi: 10.1128/br.37.2.197-214.1973. [DOI] [PMC free article] [PubMed] [Google Scholar]
  11. Dignam J. D., Lebovitz R. M., Roeder R. G. Accurate transcription initiation by RNA polymerase II in a soluble extract from isolated mammalian nuclei. Nucleic Acids Res. 1983 Mar 11;11(5):1475–1489. doi: 10.1093/nar/11.5.1475. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Fried M., Crothers D. M. Equilibria and kinetics of lac repressor-operator interactions by polyacrylamide gel electrophoresis. Nucleic Acids Res. 1981 Dec 11;9(23):6505–6525. doi: 10.1093/nar/9.23.6505. [DOI] [PMC free article] [PubMed] [Google Scholar]
  13. Garner M. M., Revzin A. A gel electrophoresis method for quantifying the binding of proteins to specific DNA regions: application to components of the Escherichia coli lactose operon regulatory system. Nucleic Acids Res. 1981 Jul 10;9(13):3047–3060. doi: 10.1093/nar/9.13.3047. [DOI] [PMC free article] [PubMed] [Google Scholar]
  14. Greenberg A., Ber R., Kra-Oz Z., Laskov R. Extinction of expression of immunoglobulin genes in myeloma X fibroblast somatic cell hybrids. Mol Cell Biol. 1987 Feb;7(2):936–939. doi: 10.1128/mcb.7.2.936. [DOI] [PMC free article] [PubMed] [Google Scholar]
  15. Greenberg A., Hijazzi M., Sharir H., Cohen L., Bergman Y., Ber R., Laskov R. Extinction of expression of the translocated myc gene in somatic cell hybrids between mouse myeloma and L-cells. Int J Cancer. 1989 Jan 15;43(1):87–92. doi: 10.1002/ijc.2910430118. [DOI] [PubMed] [Google Scholar]
  16. Griffin G. E., Leung K., Folks T. M., Kunkel S., Nabel G. J. Activation of HIV gene expression during monocyte differentiation by induction of NF-kappa B. Nature. 1989 May 4;339(6219):70–73. doi: 10.1038/339070a0. [DOI] [PubMed] [Google Scholar]
  17. Hen R., Borrelli E., Chambon P. Repression of the immunoglobulin heavy chain enhancer by the adenovirus-2 E1A products. Science. 1985 Dec 20;230(4732):1391–1394. doi: 10.1126/science.2999984. [DOI] [PubMed] [Google Scholar]
  18. Junker S., Nielsen V., Matthias P., Picard D. Both immunoglobulin promoter and enhancer sequences are targets for suppression in myeloma-fibroblast hybrid cells. EMBO J. 1988 Oct;7(10):3093–3098. doi: 10.1002/j.1460-2075.1988.tb03175.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  19. Kadesch T., Zervos P., Ruezinsky D. Functional analysis of the murine IgH enhancer: evidence for negative control of cell-type specificity. Nucleic Acids Res. 1986 Oct 24;14(20):8209–8221. doi: 10.1093/nar/14.20.8209. [DOI] [PMC free article] [PubMed] [Google Scholar]
  20. Killary A. M., Fournier R. E. A genetic analysis of extinction: trans-dominant loci regulate expression of liver-specific traits in hepatoma hybrid cells. Cell. 1984 Sep;38(2):523–534. doi: 10.1016/0092-8674(84)90507-5. [DOI] [PubMed] [Google Scholar]
  21. Landolfi N. F., Capra J. D., Tucker P. W. Interaction of cell-type-specific nuclear proteins with immunoglobulin VH promoter region sequences. Nature. 1986 Oct 9;323(6088):548–551. doi: 10.1038/323548a0. [DOI] [PubMed] [Google Scholar]
  22. Lem J., Chin A. C., Thayer M. J., Leach R. J., Fournier R. E. Coordinate regulation of two genes encoding gluconeogenic enzymes by the trans-dominant locus Tse-1. Proc Natl Acad Sci U S A. 1988 Oct;85(19):7302–7306. doi: 10.1073/pnas.85.19.7302. [DOI] [PMC free article] [PubMed] [Google Scholar]
  23. Lenardo M. J., Staudt L., Robbins P., Kuang A., Mulligan R. C., Baltimore D. Repression of the IgH enhancer in teratocarcinoma cells associated with a novel octamer factor. Science. 1989 Jan 27;243(4890):544–546. doi: 10.1126/science.2536195. [DOI] [PubMed] [Google Scholar]
  24. Lenardo M., Pierce J. W., Baltimore D. Protein-binding sites in Ig gene enhancers determine transcriptional activity and inducibility. Science. 1987 Jun 19;236(4808):1573–1577. doi: 10.1126/science.3109035. [DOI] [PubMed] [Google Scholar]
  25. Lowenthal J. W., Ballard D. W., Böhnlein E., Greene W. C. Tumor necrosis factor alpha induces proteins that bind specifically to kappa B-like enhancer elements and regulate interleukin 2 receptor alpha-chain gene expression in primary human T lymphocytes. Proc Natl Acad Sci U S A. 1989 Apr;86(7):2331–2335. doi: 10.1073/pnas.86.7.2331. [DOI] [PMC free article] [PubMed] [Google Scholar]
  26. Mather E. L., Perry R. P. Methylation status and DNase I sensitivity of immunoglobulin genes: changes associated with rearrangement. Proc Natl Acad Sci U S A. 1983 Aug;80(15):4689–4693. doi: 10.1073/pnas.80.15.4689. [DOI] [PMC free article] [PubMed] [Google Scholar]
  27. McCormick A., Wu D., Castrillo J. L., Dana S., Strobl J., Thompson E. B., Karin M. Extinction of growth hormone expression in somatic cell hybrids involves repression of the specific trans-activator GHF-1. Cell. 1988 Oct 21;55(2):379–389. doi: 10.1016/0092-8674(88)90061-x. [DOI] [PubMed] [Google Scholar]
  28. Müller M. M., Ruppert S., Schaffner W., Matthias P. A cloned octamer transcription factor stimulates transcription from lymphoid-specific promoters in non-B cells. Nature. 1988 Dec 8;336(6199):544–551. doi: 10.1038/336544a0. [DOI] [PubMed] [Google Scholar]
  29. Nudel U., Katcoff D., Zakut R., Shani M., Carmon Y., Finer M., Czosnek H., Ginsburg I., Yaffe D. Isolation and characterization of rat skeletal muscle and cytoplasmic actin genes. Proc Natl Acad Sci U S A. 1982 May;79(9):2763–2767. doi: 10.1073/pnas.79.9.2763. [DOI] [PMC free article] [PubMed] [Google Scholar]
  30. Periman P. IgG synthesis in hybrid cells from an antibody-producing mouse myeloma and an L cell substrain. Nature. 1970 Dec 12;228(5276):1086–1087. doi: 10.1038/2281086a0. [DOI] [PubMed] [Google Scholar]
  31. Petit C., Levilliers J., Ott M. O., Weiss M. C. Tissue-specific expression of the rat albumin gene: genetic control of its extinction in microcell hybrids. Proc Natl Acad Sci U S A. 1986 Apr;83(8):2561–2565. doi: 10.1073/pnas.83.8.2561. [DOI] [PMC free article] [PubMed] [Google Scholar]
  32. Picard D., Schaffner W. A lymphocyte-specific enhancer in the mouse immunoglobulin kappa gene. Nature. 1984 Jan 5;307(5946):80–82. doi: 10.1038/307080a0. [DOI] [PubMed] [Google Scholar]
  33. Picard D., Schaffner W. Cell-type preference of immunoglobulin kappa and lambda gene promoters. EMBO J. 1985 Nov;4(11):2831–2838. doi: 10.1002/j.1460-2075.1985.tb04011.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  34. Queen C., Baltimore D. Immunoglobulin gene transcription is activated by downstream sequence elements. Cell. 1983 Jul;33(3):741–748. doi: 10.1016/0092-8674(83)90016-8. [DOI] [PubMed] [Google Scholar]
  35. Queen C., Stafford J. Fine mapping of an immunoglobulin gene activator. Mol Cell Biol. 1984 Jun;4(6):1042–1049. doi: 10.1128/mcb.4.6.1042. [DOI] [PMC free article] [PubMed] [Google Scholar]
  36. Scheidereit C., Cromlish J. A., Gerster T., Kawakami K., Balmaceda C. G., Currie R. A., Roeder R. G. A human lymphoid-specific transcription factor that activates immunoglobulin genes is a homoeobox protein. Nature. 1988 Dec 8;336(6199):551–557. doi: 10.1038/336551a0. [DOI] [PubMed] [Google Scholar]
  37. Scheidereit C., Heguy A., Roeder R. G. Identification and purification of a human lymphoid-specific octamer-binding protein (OTF-2) that activates transcription of an immunoglobulin promoter in vitro. Cell. 1987 Dec 4;51(5):783–793. doi: 10.1016/0092-8674(87)90101-2. [DOI] [PubMed] [Google Scholar]
  38. Schneider J. A., Weiss M. C. Expression of differentiated functions in hepatoma cell hybrids. I. Tyrosine aminotransferase in hepatoma-fibroblast hybrids. Proc Natl Acad Sci U S A. 1971 Jan;68(1):127–131. doi: 10.1073/pnas.68.1.127. [DOI] [PMC free article] [PubMed] [Google Scholar]
  39. Schreiber E., Matthias P., Müller M. M., Schaffner W. Identification of a novel lymphoid specific octamer binding protein (OTF-2B) by proteolytic clipping bandshift assay (PCBA). EMBO J. 1988 Dec 20;7(13):4221–4229. doi: 10.1002/j.1460-2075.1988.tb03319.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  40. Sen R., Baltimore D. Inducibility of kappa immunoglobulin enhancer-binding protein Nf-kappa B by a posttranslational mechanism. Cell. 1986 Dec 26;47(6):921–928. doi: 10.1016/0092-8674(86)90807-x. [DOI] [PubMed] [Google Scholar]
  41. Sen R., Baltimore D. Multiple nuclear factors interact with the immunoglobulin enhancer sequences. Cell. 1986 Aug 29;46(5):705–716. doi: 10.1016/0092-8674(86)90346-6. [DOI] [PubMed] [Google Scholar]
  42. Shirakawa F., Chedid M., Suttles J., Pollok B. A., Mizel S. B. Interleukin 1 and cyclic AMP induce kappa immunoglobulin light-chain expression via activation of an NF-kappa B-like DNA-binding protein. Mol Cell Biol. 1989 Mar;9(3):959–964. doi: 10.1128/mcb.9.3.959. [DOI] [PMC free article] [PubMed] [Google Scholar]
  43. Singh H., Sen R., Baltimore D., Sharp P. A. A nuclear factor that binds to a conserved sequence motif in transcriptional control elements of immunoglobulin genes. Nature. 1986 Jan 9;319(6049):154–158. doi: 10.1038/319154a0. [DOI] [PubMed] [Google Scholar]
  44. Sive H. L., Roeder R. G. Interaction of a common factor with conserved promoter and enhancer sequences in histone H2B, immunoglobulin, and U2 small nuclear RNA (snRNA) genes. Proc Natl Acad Sci U S A. 1986 Sep;83(17):6382–6386. doi: 10.1073/pnas.83.17.6382. [DOI] [PMC free article] [PubMed] [Google Scholar]
  45. Sonnenschein C., Richardson U. I., Tashjian A. H., Jr Loss of growth hormone production following hybridization of a functional rat pituitary cell strain with a mouse fibroblast line. Exp Cell Res. 1971 Dec;69(2):336–344. doi: 10.1016/0014-4827(71)90233-3. [DOI] [PubMed] [Google Scholar]
  46. Staudt L. M., Clerc R. G., Singh H., LeBowitz J. H., Sharp P. A., Baltimore D. Cloning of a lymphoid-specific cDNA encoding a protein binding the regulatory octamer DNA motif. Science. 1988 Jul 29;241(4865):577–580. doi: 10.1126/science.3399892. [DOI] [PubMed] [Google Scholar]
  47. Staudt L. M., Singh H., Sen R., Wirth T., Sharp P. A., Baltimore D. A lymphoid-specific protein binding to the octamer motif of immunoglobulin genes. Nature. 1986 Oct 16;323(6089):640–643. doi: 10.1038/323640a0. [DOI] [PubMed] [Google Scholar]
  48. Sturm R., Baumruker T., Franza B. R., Jr, Herr W. A 100-kD HeLa cell octamer binding protein (OBP100) interacts differently with two separate octamer-related sequences within the SV40 enhancer. Genes Dev. 1987 Dec;1(10):1147–1160. doi: 10.1101/gad.1.10.1147. [DOI] [PubMed] [Google Scholar]
  49. Thompson E. B., Gelehrter T. D. Expression of tyrosine aminotransferase activity in somatic-cell heterokaryons: evidence for negative control of enzyme expression. Proc Natl Acad Sci U S A. 1971 Oct;68(10):2589–2593. doi: 10.1073/pnas.68.10.2589. [DOI] [PMC free article] [PubMed] [Google Scholar]
  50. Tripputi P., Guérin S. L., Moore D. D. Two mechanisms for the extinction of gene expression in hybrid cells. Science. 1988 Sep 2;241(4870):1205–1207. doi: 10.1126/science.2842865. [DOI] [PubMed] [Google Scholar]
  51. Wall R., Briskin M., Carter C., Govan H., Taylor A., Kincade P. A labile inhibitor blocks immunoglobulin kappa-light-chain-gene transcription in a pre-B leukemic cell line. Proc Natl Acad Sci U S A. 1986 Jan;83(2):295–298. doi: 10.1073/pnas.83.2.295. [DOI] [PMC free article] [PubMed] [Google Scholar]
  52. Wasylyk C., Wasylyk B. The immunoglobulin heavy-chain B-lymphocyte enhancer efficiently stimulates transcription in non-lymphoid cells. EMBO J. 1986 Mar;5(3):553–560. doi: 10.1002/j.1460-2075.1986.tb04246.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  53. Weinberger J., Jat P. S., Sharp P. A. Localization of a repressive sequence contributing to B-cell specificity in the immunoglobulin heavy-chain enhancer. Mol Cell Biol. 1988 Feb;8(2):988–992. doi: 10.1128/mcb.8.2.988. [DOI] [PMC free article] [PubMed] [Google Scholar]
  54. Wirth T., Staudt L., Baltimore D. An octamer oligonucleotide upstream of a TATA motif is sufficient for lymphoid-specific promoter activity. Nature. 1987 Sep 10;329(6135):174–178. doi: 10.1038/329174a0. [DOI] [PubMed] [Google Scholar]
  55. Yu H., Porton B., Shen L. Y., Eckhardt L. A. Role of the octamer motif in hybrid cell extinction of immunoglobulin gene expression: extinction is dominant in a two enhancer system. Cell. 1989 Aug 11;58(3):441–448. doi: 10.1016/0092-8674(89)90425-x. [DOI] [PubMed] [Google Scholar]
  56. Zaller D. M., Yu H., Eckhardt L. A. Genes activated in the presence of an immunoglobulin enhancer or promoter are negatively regulated by a T-lymphoma cell line. Mol Cell Biol. 1988 May;8(5):1932–1939. doi: 10.1128/mcb.8.5.1932. [DOI] [PMC free article] [PubMed] [Google Scholar]

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