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. 1988 Jul;8(7):2753–2762. doi: 10.1128/mcb.8.7.2753

Expression of recombinant platelet-derived growth factor A- and B-chain homodimers in rat-1 cells and human fibroblasts reveals differences in protein processing and autocrine effects.

M Bywater 1, F Rorsman 1, E Bongcam-Rudloff 1, G Mark 1, A Hammacher 1, C H Heldin 1, B Westermark 1, C Betsholtz 1
PMCID: PMC363492  PMID: 3405217

Abstract

The autocrine effects of platelet-derived growth factor (PDGF) A- and B-chain homodimers (PDGF-AA and PDGF-BB) on rat-1 cells and human fibroblasts have been investigated by using human PDGF A- and B-chain cDNA clones expressed in a retroviral vector. Infection with replication-defective virus carrying the B-chain cDNA resulted in a phenotypical transformation resembling that induced by simian sarcoma virus. The resulting cells were focus forming in monolayer cultures, grew to high saturation densities, and formed large colonies in soft agar. The PDGF A-chain transfectants showed no transformed morphology and lacked focus-forming activity but grew to high saturation density in monolayer culture and formed small colonies in soft agar. A similar but weaker effect was obtained with an A-chain cDNA variant containing a 69-base-pair insertion in the 3' end of the protein-coding domain. A- and B-chain transfectants released PDGF receptor-competing activity into the medium, but only the medium conditioned by the B-chain transfectants possessed potent mitogenic activity on human fibroblasts. Both types of transfectants had downregulated levels of PDGF receptors; however, the B-chain transfectants were downregulated to significantly lower levels. Metabolic labeling and immunoprecipitations with PDGF antiserum showed that the PDGF B-chain protein was processed to a 24-kilodalton cell-associated and a 30-kilodalton secreted dimeric protein. The A-chain protein was rapidly secreted as a 31-kilodalton dimeric protein. The present study shows a marked difference in the autocrine effects of PDGF-AA and -BB expressed under the control of a retroviral promoter and suggests that different biological properties may be assigned to these two PDGF isoforms.

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Selected References

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

  1. Auffray C., Rougeon F. Purification of mouse immunoglobulin heavy-chain messenger RNAs from total myeloma tumor RNA. Eur J Biochem. 1980 Jun;107(2):303–314. doi: 10.1111/j.1432-1033.1980.tb06030.x. [DOI] [PubMed] [Google Scholar]
  2. Betsholtz C., Heldin C. H., Nister M., Ek B., Wasteson A., Westermark B. Synthesis of a PDGF-like growth factor in human glioma and sarcoma cells suggests the expression of the cellular homologue to the transforming protein of simian sarcoma virus. Biochem Biophys Res Commun. 1983 Nov 30;117(1):176–182. doi: 10.1016/0006-291x(83)91557-7. [DOI] [PubMed] [Google Scholar]
  3. Betsholtz C., Johnsson A., Heldin C. H., Westermark B. Efficient reversion of simian sarcoma virus-transformation and inhibition of growth factor-induced mitogenesis by suramin. Proc Natl Acad Sci U S A. 1986 Sep;83(17):6440–6444. doi: 10.1073/pnas.83.17.6440. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Betsholtz C., Johnsson A., Heldin C. H., Westermark B., Lind P., Urdea M. S., Eddy R., Shows T. B., Philpott K., Mellor A. L. cDNA sequence and chromosomal localization of human platelet-derived growth factor A-chain and its expression in tumour cell lines. Nature. 1986 Apr 24;320(6064):695–699. doi: 10.1038/320695a0. [DOI] [PubMed] [Google Scholar]
  5. Betsholtz C., Westermark B. Growth factor-induced proliferation of human fibroblasts in serum-free culture depends on cell density and extracellular calcium concentration. J Cell Physiol. 1984 Feb;118(2):203–210. doi: 10.1002/jcp.1041180213. [DOI] [PubMed] [Google Scholar]
  6. Blobel G., Dobberstein B. Transfer of proteins across membranes. I. Presence of proteolytically processed and unprocessed nascent immunoglobulin light chains on membrane-bound ribosomes of murine myeloma. J Cell Biol. 1975 Dec;67(3):835–851. doi: 10.1083/jcb.67.3.835. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. Collins T., Bonthron D. T., Orkin S. H. Alternative RNA splicing affects function of encoded platelet-derived growth factor A chain. Nature. 1987 Aug 13;328(6131):621–624. doi: 10.1038/328621a0. [DOI] [PubMed] [Google Scholar]
  8. Collins T., Pober J. S., Gimbrone M. A., Jr, Hammacher A., Betsholtz C., Westermark B., Heldin C. H. Cultured human endothelial cells express platelet-derived growth factor A chain. Am J Pathol. 1987 Jan;126(1):7–12. [PMC free article] [PubMed] [Google Scholar]
  9. Cone R. D., Mulligan R. C. High-efficiency gene transfer into mammalian cells: generation of helper-free recombinant retrovirus with broad mammalian host range. Proc Natl Acad Sci U S A. 1984 Oct;81(20):6349–6353. doi: 10.1073/pnas.81.20.6349. [DOI] [PMC free article] [PubMed] [Google Scholar]
  10. Dalla-Favera R., Gallo R. C., Giallongo A., Croce C. M. Chromosomal localization of the human homolog (c-sis) of the simian sarcoma virus onc gene. Science. 1982 Nov 12;218(4573):686–688. doi: 10.1126/science.6291150. [DOI] [PubMed] [Google Scholar]
  11. Devare S. G., Reddy E. P., Law J. D., Robbins K. C., Aaronson S. A. Nucleotide sequence of the simian sarcoma virus genome: demonstration that its acquired cellular sequences encode the transforming gene product p28sis. Proc Natl Acad Sci U S A. 1983 Feb;80(3):731–735. doi: 10.1073/pnas.80.3.731. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Dickson C., Peters G. Potential oncogene product related to growth factors. 1987 Apr 30-May 6Nature. 326(6116):833–833. doi: 10.1038/326833a0. [DOI] [PubMed] [Google Scholar]
  13. Feinberg A. P., Vogelstein B. A technique for radiolabeling DNA restriction endonuclease fragments to high specific activity. Anal Biochem. 1983 Jul 1;132(1):6–13. doi: 10.1016/0003-2697(83)90418-9. [DOI] [PubMed] [Google Scholar]
  14. Finzi E., Fleming T., Segatto O., Pennington C. Y., Bringman T. S., Derynck R., Aaronson S. A. The human transforming growth factor type alpha coding sequence is not a direct-acting oncogene when overexpressed in NIH 3T3 cells. Proc Natl Acad Sci U S A. 1987 Jun;84(11):3733–3737. doi: 10.1073/pnas.84.11.3733. [DOI] [PMC free article] [PubMed] [Google Scholar]
  15. Garrett J. S., Coughlin S. R., Niman H. L., Tremble P. M., Giels G. M., Williams L. T. Blockade of autocrine stimulation in simian sarcoma virus-transformed cells reverses down-regulation of platelet-derived growth factor receptors. Proc Natl Acad Sci U S A. 1984 Dec;81(23):7466–7470. doi: 10.1073/pnas.81.23.7466. [DOI] [PMC free article] [PubMed] [Google Scholar]
  16. Heldin C. H., Betsholtz C., Claesson-Welsh L., Westermark B. Subversion of growth regulatory pathways in malignant transformation. Biochim Biophys Acta. 1987 Nov 25;907(3):219–244. doi: 10.1016/0304-419x(87)90007-2. [DOI] [PubMed] [Google Scholar]
  17. Heldin C. H., Johnsson A., Ek B., Wennergren S., Rönnstrand L., Hammacher A., Faulders B., Wasteson A., Westermark B. Purification of human platelet-derived growth factor. Methods Enzymol. 1987;147:3–13. doi: 10.1016/0076-6879(87)47094-8. [DOI] [PubMed] [Google Scholar]
  18. Heldin C. H., Johnsson A., Wennergren S., Wernstedt C., Betsholtz C., Westermark B. A human osteosarcoma cell line secretes a growth factor structurally related to a homodimer of PDGF A-chains. Nature. 1986 Feb 6;319(6053):511–514. doi: 10.1038/319511a0. [DOI] [PubMed] [Google Scholar]
  19. Heldin C. H., Westermark B., Wasteson A. Demonstration of an antibody against platelet-derived growth factor. Exp Cell Res. 1981 Dec;136(2):255–261. doi: 10.1016/0014-4827(81)90003-3. [DOI] [PubMed] [Google Scholar]
  20. Johnsson A., Betsholtz C., Heldin C. H., Westermark B. Antibodies against platelet-derived growth factor inhibit acute transformation by simian sarcoma virus. Nature. 1985 Oct 3;317(6036):438–440. doi: 10.1038/317438a0. [DOI] [PubMed] [Google Scholar]
  21. Johnsson A., Betsholtz C., Heldin C. H., Westermark B. The phenotypic characteristics of simian sarcoma virus-transformed human fibroblasts suggest that the v-sis gene product acts solely as a PDGF receptor agonist in cell transformation. EMBO J. 1986 Jul;5(7):1535–1541. doi: 10.1002/j.1460-2075.1986.tb04394.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  22. Johnsson A., Betsholtz C., von der Helm K., Heldin C. H., Westermark B. Platelet-derived growth factor agonist activity of a secreted form of the v-sis oncogene product. Proc Natl Acad Sci U S A. 1985 Mar;82(6):1721–1725. doi: 10.1073/pnas.82.6.1721. [DOI] [PMC free article] [PubMed] [Google Scholar]
  23. Johnsson A., Heldin C. H., Westermark B., Wasteson A. Platelet-derived growth factor: identification of constituent polypeptide chains. Biochem Biophys Res Commun. 1982 Jan 15;104(1):66–74. doi: 10.1016/0006-291x(82)91941-6. [DOI] [PubMed] [Google Scholar]
  24. Korman A. J., Frantz J. D., Strominger J. L., Mulligan R. C. Expression of human class II major histocompatibility complex antigens using retrovirus vectors. Proc Natl Acad Sci U S A. 1987 Apr;84(8):2150–2154. doi: 10.1073/pnas.84.8.2150. [DOI] [PMC free article] [PubMed] [Google Scholar]
  25. Lang R. A., Metcalf D., Gough N. M., Dunn A. R., Gonda T. J. Expression of a hemopoietic growth factor cDNA in a factor-dependent cell line results in autonomous growth and tumorigenicity. Cell. 1985 Dec;43(2 Pt 1):531–542. doi: 10.1016/0092-8674(85)90182-5. [DOI] [PubMed] [Google Scholar]
  26. Miller A. D., Eckner R. J., Jolly D. J., Friedmann T., Verma I. M. Expression of a retrovirus encoding human HPRT in mice. Science. 1984 Aug 10;225(4662):630–632. doi: 10.1126/science.6377498. [DOI] [PubMed] [Google Scholar]
  27. Nistér M., Heldin C. H., Westermark B. Clonal variation in the production of a platelet-derived growth factor-like protein and expression of corresponding receptors in a human malignant glioma. Cancer Res. 1986 Jan;46(1):332–340. [PubMed] [Google Scholar]
  28. Owen A. J., Pantazis P., Antoniades H. N. Simian sarcoma virus--transformed cells secrete a mitogen identical to platelet-derived growth factor. Science. 1984 Jul 6;225(4657):54–56. doi: 10.1126/science.6328659. [DOI] [PubMed] [Google Scholar]
  29. Robbins K. C., Antoniades H. N., Devare S. G., Hunkapiller M. W., Aaronson S. A. Structural and immunological similarities between simian sarcoma virus gene product(s) and human platelet-derived growth factor. Nature. 1983 Oct 13;305(5935):605–608. doi: 10.1038/305605a0. [DOI] [PubMed] [Google Scholar]
  30. Robbins K. C., Leal F., Pierce J. H., Aaronson S. A. The v-sis/PDGF-2 transforming gene product localizes to cell membranes but is not a secretory protein. EMBO J. 1985 Jul;4(7):1783–1792. doi: 10.1002/j.1460-2075.1985.tb03851.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  31. Rogelj S., Weinberg R. A., Fanning P., Klagsbrun M. Basic fibroblast growth factor fused to a signal peptide transforms cells. Nature. 1988 Jan 14;331(6152):173–175. doi: 10.1038/331173a0. [DOI] [PubMed] [Google Scholar]
  32. Rorsman F., Bywater M., Knott T. J., Scott J., Betsholtz C. Structural characterization of the human platelet-derived growth factor A-chain cDNA and gene: alternative exon usage predicts two different precursor proteins. Mol Cell Biol. 1988 Feb;8(2):571–577. doi: 10.1128/mcb.8.2.571. [DOI] [PMC free article] [PubMed] [Google Scholar]
  33. Rosenthal A., Lindquist P. B., Bringman T. S., Goeddel D. V., Derynck R. Expression in rat fibroblasts of a human transforming growth factor-alpha cDNA results in transformation. Cell. 1986 Jul 18;46(2):301–309. doi: 10.1016/0092-8674(86)90747-6. [DOI] [PubMed] [Google Scholar]
  34. Roussel M. F., Dull T. J., Rettenmier C. W., Ralph P., Ullrich A., Sherr C. J. Transforming potential of the c-fms proto-oncogene (CSF-1 receptor). Nature. 1987 Feb 5;325(6104):549–552. doi: 10.1038/325549a0. [DOI] [PubMed] [Google Scholar]
  35. Stern D. F., Hare D. L., Cecchini M. A., Weinberg R. A. Construction of a novel oncogene based on synthetic sequences encoding epidermal growth factor. Science. 1987 Jan 16;235(4786):321–324. doi: 10.1126/science.3492043. [DOI] [PubMed] [Google Scholar]
  36. Stroobant P., Waterfield M. D. Purification and properties of porcine platelet-derived growth factor. EMBO J. 1984 Dec 1;3(12):2963–2967. doi: 10.1002/j.1460-2075.1984.tb02241.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  37. Swan D. C., McBride O. W., Robbins K. C., Keithley D. A., Reddy E. P., Aaronson S. A. Chromosomal mapping of the simian sarcoma virus onc gene analogue in human cells. Proc Natl Acad Sci U S A. 1982 Aug;79(15):4691–4695. doi: 10.1073/pnas.79.15.4691. [DOI] [PMC free article] [PubMed] [Google Scholar]
  38. Taira M., Yoshida T., Miyagawa K., Sakamoto H., Terada M., Sugimura T. cDNA sequence of human transforming gene hst and identification of the coding sequence required for transforming activity. Proc Natl Acad Sci U S A. 1987 May;84(9):2980–2984. doi: 10.1073/pnas.84.9.2980. [DOI] [PMC free article] [PubMed] [Google Scholar]
  39. Watanabe S., Lazar E., Sporn M. B. Transformation of normal rat kidney (NRK) cells by an infectious retrovirus carrying a synthetic rat type alpha transforming growth factor gene. Proc Natl Acad Sci U S A. 1987 Mar;84(5):1258–1262. doi: 10.1073/pnas.84.5.1258. [DOI] [PMC free article] [PubMed] [Google Scholar]
  40. Waterfield M. D., Scrace G. T., Whittle N., Stroobant P., Johnsson A., Wasteson A., Westermark B., Heldin C. H., Huang J. S., Deuel T. F. Platelet-derived growth factor is structurally related to the putative transforming protein p28sis of simian sarcoma virus. Nature. 1983 Jul 7;304(5921):35–39. doi: 10.1038/304035a0. [DOI] [PubMed] [Google Scholar]
  41. Westermark B., Johnsson A., Paulsson Y., Betsholtz C., Heldin C. H., Herlyn M., Rodeck U., Koprowski H. Human melanoma cell lines of primary and metastatic origin express the genes encoding the chains of platelet-derived growth factor (PDGF) and produce a PDGF-like growth factor. Proc Natl Acad Sci U S A. 1986 Oct;83(19):7197–7200. doi: 10.1073/pnas.83.19.7197. [DOI] [PMC free article] [PubMed] [Google Scholar]
  42. Yarden Y., Escobedo J. A., Kuang W. J., Yang-Feng T. L., Daniel T. O., Tremble P. M., Chen E. Y., Ando M. E., Harkins R. N., Francke U. Structure of the receptor for platelet-derived growth factor helps define a family of closely related growth factor receptors. Nature. 1986 Sep 18;323(6085):226–232. doi: 10.1038/323226a0. [DOI] [PubMed] [Google Scholar]

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