Overexpression of HSP25 reduces the level of TNFα‐induced oxidative DNA damage biomarker, 8‐hydroxy‐2′‐deoxyguanosine, in L929 cells

Previously we and others have demonstrated that oxidative stress involving generation of reactive oxygen species (ROS) is responsible for the cytotoxic action of TNFα. Protective effect of small heat shock proteins (HSP) against diverse oxidative stress conditions has been suggested. Although overexpression of small HSP was shown to provide an enhanced survival of TNFα‐sensitive cells when challenged with TNFα, neither the nature of TNFα‐induced cytotoxicity nor the protective mechanism of small HSP has been completely understood. In this study, we have attempted to determine whether TNFα induces oxidative DNA damage in TNFα‐sensitive L929 cells. We chose to measure the level of 8‐hydroxy‐2′‐deoxyguanosine (8 ohdG), which has been increasingly recognized as one of the most sensitive markers of oxidative DNA damage. Our results clearly demonstrated that the level of 8 ohdG increased in L929 cells in a TNFα dose‐dependent manner. Subsequently, we asked whether small HSP has a protective effect on TNFα‐induced oxidative DNA damage. To accomplish this goal, we have stably transfected into L929 cells, which are devoid of endogenous small HSP, with the mouse small hsp cDNA (hsp25). We found that TNFα‐induced 8 ohdG was decreased in cells overexpressing exogenous small HSP25. We also found that the cell‐killing activity of TNFα was decreased in these cells as measured by clonogenic survival. Taken together, results from the current study show that a cytotoxic mechanism of TNFα involves oxidative damage of DNA, and that overexpression of the small HSP25 reduces this oxidative damage. We suggest that the reduction of oxidative DNA damage is an important protective mechanisms of small HSP against TNFα. J. Cell. Physiol. 174:27–34, 1998. © 1998 Wiley‐Liss, Inc.

[1]  O. Aruoma,et al.  Damage to the bases in DNA induced by hydrogen peroxide and ferric ion chelates. , 1989, The Journal of biological chemistry.

[2]  B. Ames,et al.  Endogenous oxidative DNA damage, aging, and cancer. , 1989, Free radical research communications.

[3]  L. Loeb,et al.  8-Hydroxyguanine, an abundant form of oxidative DNA damage, causes G----T and A----C substitutions. , 1992, The Journal of biological chemistry.

[4]  J. Landry,et al.  Heat shock resistance conferred by expression of the human HSP27 gene in rodent cells , 1989, The Journal of cell biology.

[5]  R. Lunn,et al.  Correlation between the anticellular and DNA fragmenting activities of tumor necrosis factor. , 1988, Cancer research.

[6]  R. Floyd,et al.  Role of oxygen free radicals in carcinogenesis and brain ischemia , 1990, FASEB journal : official publication of the Federation of American Societies for Experimental Biology.

[7]  B. Ames,et al.  Normal oxidative damage to mitochondrial and nuclear DNA is extensive. , 1988, Proceedings of the National Academy of Sciences of the United States of America.

[8]  G. Wong,et al.  Manganous superoxide dismutase is essential for cellular resistance to cytotoxicity of tumor necrosis factor , 1989, Cell.

[9]  O. H. Lowry,et al.  Protein measurement with the Folin phenol reagent. , 1951, The Journal of biological chemistry.

[10]  B. Halliwell,et al.  Role of free radicals and catalytic metal ions in human disease: an overview. , 1990, Methods in enzymology.

[11]  R C Gupta,et al.  Nonrandom binding of the carcinogen N-hydroxy-2-acetylaminofluorene to repetitive sequences of rat liver DNA in vivo. , 1984, Proceedings of the National Academy of Sciences of the United States of America.

[12]  J. Landry,et al.  Modulation of cellular thermoresistance and actin filament stability accompanies phosphorylation-induced changes in the oligomeric structure of heat shock protein 27 , 1995, Molecular and cellular biology.

[13]  R. Klemenz,et al.  Cloning of the mouse hsp25 gene and an extremely conserved hsp25 pseudogene. , 1993, Gene.

[14]  W. J. Johnson,et al.  Recombinant tumor necrosis factor and interleukin-1 both stimulate human synovial cell arachidonic acid release and phospholipid metabolism. , 1987, Biochemical and biophysical research communications.

[15]  M. Borrelli,et al.  Development of acute thermotolerance in 1929 cells: Lack of HSP28 synthesis and phosphorylation , 1992, Journal of cellular physiology.

[16]  R L Kassel,et al.  An endotoxin-induced serum factor that causes necrosis of tumors. , 1975, Proceedings of the National Academy of Sciences of the United States of America.

[17]  T. Buttke,et al.  Lipid hydroperoxides induce apoptosis in T cells displaying a HIV-associated glutathione peroxidase deficiency. , 1994, The Journal of biological chemistry.

[18]  T. Shirai,et al.  Cloning and expression in Escherichia coli of the gene for human tumour necrosis factor , 1985, Nature.

[19]  D. A. Flick,et al.  Comparison of in vitro cell cytotoxic assays for tumor necrosis factor. , 1984, Journal of immunological methods.

[20]  R. Floyd,et al.  Hydroxyl free radical mediated formation of 8-hydroxyguanine in isolated DNA. , 1988, Archives of biochemistry and biophysics.

[21]  Andrew P. Duchon,et al.  Oxygen free radical involvement in ischemia and reperfusion injury to brain , 1988, Neuroscience Letters.

[22]  G. Hahn,et al.  Hypoxia and resistance to hydrogen peroxide confer resistance to tumor necrosis factor in murine L929 cells. , 1992, Radiation research.

[23]  U. K. Laemmli,et al.  Cleavage of Structural Proteins during the Assembly of the Head of Bacteriophage T4 , 1970, Nature.

[24]  B. Halliwell,et al.  Oxygen toxicity, oxygen radicals, transition metals and disease. , 1984, The Biochemical journal.

[25]  K. Frenkel,et al.  Suppression of tumor promoter-induced oxidative events and DNA damage in vivo by sarcophytol A: a possible mechanism of antipromotion. , 1992, Cancer research.

[26]  P. Mehlen,et al.  Human hsp27, Drosophila hsp27 and human alphaB‐crystallin expression‐mediated increase in glutathione is essential for the protective activity of these proteins against TNFalpha‐induced cell death. , 1996, The EMBO journal.

[27]  S. Nishimura,et al.  Hydroxylation of deoxyguanosine at the C-8 position by ascorbic acid and other reducing agents. , 1984, Nucleic acids research.

[28]  J. Strickler,et al.  Molecular cloning of the complementary DNA for human tumor necrosis factor. , 1985, Science.

[29]  J. Landry,et al.  HSP27 phosphorylation-mediated resistance against actin fragmentation and cell death induced by oxidative stress. , 1996, Cancer research.

[30]  N. Sato,et al.  Actions of tumor necrosis factor on cultured vascular endothelial cells: morphologic modulation, growth inhibition, and cytotoxicity. , 1986, Journal of the National Cancer Institute.

[31]  L. Lin,et al.  Biological effects of recombinant human tumor necrosis factor and its novel muteins on tumor and normal cell lines. , 1987, Cancer research.

[32]  H. Kuriyama,et al.  Intracellular hydroxyl radical production induced by recombinant human tumor necrosis factor and its implication in the killing of tumor cells in vitro. , 1989, Cancer research.

[33]  J. Liehr,et al.  Elevated 8-hydroxydeoxyguanosine levels in DNA of diethylstilbestrol-treated Syrian hamsters: covalent DNA damage by free radicals generated by redox cycling of diethylstilbestrol. , 1991, Cancer research.

[34]  S. A. Leadon,et al.  Recombinant Human Tumor Necrosis Factor by in Vitro Oxidative Damage in Murine Tumor Cells Treated Updated Version Citing Articles E-mail Alerts Oxidative Damage in Murine Tumor Cells Treated in Vitro by Recombinant Human Tumor Necrosis Factor1 , 2022 .

[35]  P. Mehlen,et al.  Constitutive expression of human hsp27, Drosophila hsp27, or human alpha B-crystallin confers resistance to TNF- and oxidative stress-induced cytotoxicity in stably transfected murine L929 fibroblasts. , 1995, Journal of immunology.

[36]  D. Goeddel,et al.  Induction of manganous superoxide dismutase by tumor necrosis factor: possible protective mechanism , 1988, Science.

[37]  B. Aggarwal,et al.  Recombinant human tumor necrosis factor-alpha: effects on proliferation of normal and transformed cells in vitro. , 1985, Science.

[38]  P. Mehlen,et al.  Tumor necrosis factor‐α induces changes in the phosphorylation, cellular localization, and oligomerization of human hsp27, a stress protein that confers cellular resistance to this cytokine , 1995 .

[39]  T. Puck,et al.  ACTION OF X-RAYS ON MAMMALIAN CELLS , 1956, The Journal of experimental medicine.