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Chemical genetic screening identifies critical pathways in anthrax lethal toxin-induced pathogenesis

  1. Author:
    Panchal, R. G.
    Ruthel, G.
    Brittingham, K. C.
    Lane, D.
    Kenny, T. A.
    Gussio, R.
    Lazo, J. S.
    Bavari, S.

  2. Author Address

    SAIC Frederick Inc, NCI Frederick, Target Struct Based Drug Discovery Grp, Ft Detrick, MD 21702 USA. USA, Res Inst Infect Dis, Ft Detrick, MD 21702 USA. NCI, Dev Therapeut Program, Informat Technol Branch, Target Struct Based Drug Discovery Grp, Ft Detrick, MD 21702 USA. Univ Pittsburgh, Dept Pharmacol, Pittsburgh, PA 15260 USA.;Panchal, RG, SAIC Frederick Inc, NCI Frederick, Target Struct Based Drug Discovery Grp, Ft Detrick, MD 21702 USA.;rekha.panchal@amedd.army.mil sina.bavari@amedd.army.mil
    1. Year: 2007
    2. Date: Mar
  2. Journal: Chemistry & Biology
    1. 14
    2. 3
    3. Pages: 245-255
  4. Type of Article: Article
  5. ISSN: 1074-5521
  1. Abstract:

    Anthrax lethal toxin (LT)-induced cell death via mitogen-activated protein kinase kinase (MAPKK) cleavage remains questionable. Here, a chemical genetics approach was used to investigate what pathways mediate LT-induced cell death. Several small molecules were found to protect macrophages from anthrax LT cytotoxicity and MAPKK from cleavage by lethal factor (LF), without inhibiting LF enzymatic activity or cellular proteasome activity. Interestingly, the compounds activated MAPK-signaling molecules, induced proinflammatory cytokine production, and inhibited LT-induced macrophage apoptosis in a concentration-dependent manner. We propose that induction of antiapoptotic responses by MAPK-dependent or -independent pathways and activation of host innate responses may protect macrophages; from anthrax LT-induced cell death. Altering host responses through a chemical genetics approach can help identify critical cellular pathways involved in the pathogenesis of anthrax and can be exploited to further explore host-pathogen interactions.

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External Sources

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  2. DOI: 10.1016/j.chembiol.2007.01.007
  3. View record in Web of Science®
  4. WOS: 000245306500006

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