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Modulation of expression of insulin and IGF-I receptor by Epstein-Barr virus and its gene products LMP and EBNA-2 in lymphocyte cell lines.
J Cell Physiol. 1993 Mar; 154(3):486-95.JC

Abstract

The receptors for insulin and insulin-like growth factor I (IGF-I) are two closely related integral membrane glycoproteins involved in signalling of cell growth and metabolism. We have used the unique paradigm of pairs of Burkitt lymphoma cell lines (BLO2, BL30, BL41) with or without Epstein-Barr Virus (EBV) infection and cells transfected with EBV-related genes to examine effects of EBV on expression of these receptors at the gene and protein functional level. In BL30 and BL41 cells, EBV infection increased surface insulin binding and total receptor number by 2- and 18-fold, respectively. By contrast, EBV infection decreased total IGF-I receptors by 29 to 87% in all three cell lines. In general, there was a correlation between total receptor concentration and the level of insulin or IGF-I receptor mRNAs, although in one cell line insulin binding increased while receptor mRNA levels decreased slightly, suggesting posttranslational effects. BL41 cells transfected with a vector expressing the EBV latent membrane protein (LMP) exhibited a 2.6- to 3.2-fold increase in insulin receptor expression, whereas cells transfected with EBNA-2 (one of the EBV nuclear antigens) alone exhibited no effect. However, EBNA-2 appears to be required for the EBV effect on insulin receptor expression since cells infected with a mutant virus, P3JHRI, which lacks the EBNA-2 gene failed to show an increase in insulin receptor number. These data indicate that EBV infection of lymphocytes increases expression of insulin receptors while simultaneously decreasing expression of IGF-I receptors. The magnitude and sometimes even the direction of change, depends on host cell factors. A maximal increase in insulin receptors appears to require the coordinate action of several of the EBV proteins including LMP and EBNA-2.

Authors+Show Affiliations

Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, P.H.S.

Language

eng

PubMed ID

8382208

Citation

Kriauciunas, K M., et al. "Modulation of Expression of Insulin and IGF-I Receptor By Epstein-Barr Virus and Its Gene Products LMP and EBNA-2 in Lymphocyte Cell Lines." Journal of Cellular Physiology, vol. 154, no. 3, 1993, pp. 486-95.
Kriauciunas KM, Goldstein BJ, Lipes MA, et al. Modulation of expression of insulin and IGF-I receptor by Epstein-Barr virus and its gene products LMP and EBNA-2 in lymphocyte cell lines. J Cell Physiol. 1993;154(3):486-95.
Kriauciunas, K. M., Goldstein, B. J., Lipes, M. A., & Kahn, C. R. (1993). Modulation of expression of insulin and IGF-I receptor by Epstein-Barr virus and its gene products LMP and EBNA-2 in lymphocyte cell lines. Journal of Cellular Physiology, 154(3), 486-95.
Kriauciunas KM, et al. Modulation of Expression of Insulin and IGF-I Receptor By Epstein-Barr Virus and Its Gene Products LMP and EBNA-2 in Lymphocyte Cell Lines. J Cell Physiol. 1993;154(3):486-95. PubMed PMID: 8382208.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Modulation of expression of insulin and IGF-I receptor by Epstein-Barr virus and its gene products LMP and EBNA-2 in lymphocyte cell lines. AU - Kriauciunas,K M, AU - Goldstein,B J, AU - Lipes,M A, AU - Kahn,C R, PY - 1993/3/1/pubmed PY - 1993/3/1/medline PY - 1993/3/1/entrez SP - 486 EP - 95 JF - Journal of cellular physiology JO - J Cell Physiol VL - 154 IS - 3 N2 - The receptors for insulin and insulin-like growth factor I (IGF-I) are two closely related integral membrane glycoproteins involved in signalling of cell growth and metabolism. We have used the unique paradigm of pairs of Burkitt lymphoma cell lines (BLO2, BL30, BL41) with or without Epstein-Barr Virus (EBV) infection and cells transfected with EBV-related genes to examine effects of EBV on expression of these receptors at the gene and protein functional level. In BL30 and BL41 cells, EBV infection increased surface insulin binding and total receptor number by 2- and 18-fold, respectively. By contrast, EBV infection decreased total IGF-I receptors by 29 to 87% in all three cell lines. In general, there was a correlation between total receptor concentration and the level of insulin or IGF-I receptor mRNAs, although in one cell line insulin binding increased while receptor mRNA levels decreased slightly, suggesting posttranslational effects. BL41 cells transfected with a vector expressing the EBV latent membrane protein (LMP) exhibited a 2.6- to 3.2-fold increase in insulin receptor expression, whereas cells transfected with EBNA-2 (one of the EBV nuclear antigens) alone exhibited no effect. However, EBNA-2 appears to be required for the EBV effect on insulin receptor expression since cells infected with a mutant virus, P3JHRI, which lacks the EBNA-2 gene failed to show an increase in insulin receptor number. These data indicate that EBV infection of lymphocytes increases expression of insulin receptors while simultaneously decreasing expression of IGF-I receptors. The magnitude and sometimes even the direction of change, depends on host cell factors. A maximal increase in insulin receptors appears to require the coordinate action of several of the EBV proteins including LMP and EBNA-2. SN - 0021-9541 UR - https://www.unboundmedicine.com/medline/citation/8382208/Modulation_of_expression_of_insulin_and_IGF_I_receptor_by_Epstein_Barr_virus_and_its_gene_products_LMP_and_EBNA_2_in_lymphocyte_cell_lines_ L2 - https://doi.org/10.1002/jcp.1041540306 DB - PRIME DP - Unbound Medicine ER -