Modulation of sulfur mustard induced cell death in human epidermal keratinocytes using IL-10 and TNF-α

✍ Scribed by Aziz Qabar; Marian Nelson; Juanita Guzman; Charlene Corun; Bor-Jang Hwang; Mark Steinberg

• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 325 KB
• Volume: 19
• Category: Article
• ISSN: 1095-6670
• DOI: 10.1002/jbt.20089

✦ Synopsis

Abstract

We compared the effects of overexpressing a tightly regulated anti‐inflammatory cytokine, interleukin 10 (IL‐10), and the pro‐inflammatory cytokine tumor necrosis factor‐alpha (TNF‐α) on sulfur mustard induced cytotoxicity in human epidermal keratinocytes. Both cytokines were overexpressed when compared with the cells transfected with the empty vector as determined by quantitative ELISA. Cells overexpressing interleukin 10 suppressed the pro‐inflammatory cytokines interleukin 8 and interleukin 6 following exposure to 50–300 μM sulfur mustard. These cells exhibited delayed onset of sulfur mustard induced cell death. On the other hand, cells overexpressing tumor necrosis factor alpha induced a sustained elevation in both interleukin 6 and 8 expression following exposure to 50–300 μM sulfur mustard. These cells were sensitized to the effects of sulfur mustard that resulted in an increased sulfur mustard induced cell death. Normal human epidermal keartinocytes treated with sulfur mustard exhibited elevated levels of tumor necrosis factor alpha expression and increased activity of nuclear factor kappa B. Gene array data indicated that cells overexpressing interleukin 10 induced several genes that are involved in growth promotion and cell‐fate determination. We, therefore, identify IL‐10 and TNF‐α signal transduction pathways and their components as possible candidates for early therapeutic intervention against sulfur mustard induced cell injury. © 2005 Wiley Periodicals, Inc. J Biochem Mol Toxicol 19:213–225, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/jbt.20089