Chloramphenicol Causes Mitochondrial Stress, Decreases ATP Biosynthesis, Induces Matrix metalloproteinase-13 Expression, and Solid-Tumor Cell Invasion

Toxicol Sci. 2010 Jul;116(1):140-50. doi: 10.1093/toxsci/kfq085. Epub 2010 Mar 25.

Abstract

Overuse and abuse of antibiotics can increase the risk of cancer. Chloramphenicol can inhibit both bacterial and mitochondrial protein synthesis, causing mitochondrial stress and decreased ATP biosynthesis. Chloramphenicol can accelerate cancer progression; however, the underlying mechanisms of chloramphenicol in carcinogenesis and cancer progression are still unclear. We found that chloramphenicol can induce matrix metalloproteinase (MMP)-13 expression and increase MMP-13 protein in conditioned medium, resulting in an increase in cancer cell invasion. Chloramphenicol also activated c-Jun N-terminal kinases (JNK) and phosphatidylinositol 3-kinase (PI-3K)/Akt signaling, leading to c-Jun protein phosphorylation. The activated c-Jun protein has been proven to activate binding to the MMP-13 promoter and also upregulate the amount of MMP-13. Both the SP 600125 (JNK inhibitor) and LY 294002 (PI-3K/Akt inhibitor) can inhibit chloramphenicol-induced c-Jun phosphorylation, MMP-13 expression, and cell invasion. Overexpression of the dominant-negative JNK and PI-3K p85 subunit also negate chloramphenicol-induced responses. Other antibiotics that cause mitochondrial stress and a decrease in ATP biosynthesis also induce MMP-13 expression. These findings suggest that chloramphenicol-induced PI-3K/Akt, JNK phosphorylation, and activator protein 1 activation might function as a novel mitochondrial stress signal that result in an increase of MMP-13 expression and MMP-13-associated cancer cell invasion. The findings of this study confirms that chloramphenicol, and other 70S ribosomal inhibitors, should be administered with caution, especially during cancer therapy.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adenosine Triphosphate / biosynthesis*
  • Base Sequence
  • Cell Line, Tumor
  • Chloramphenicol / toxicity*
  • Chromatin Immunoprecipitation
  • DNA Primers
  • Enzyme Induction
  • Humans
  • MAP Kinase Kinase 4 / metabolism
  • Matrix Metalloproteinase 13 / biosynthesis*
  • Matrix Metalloproteinase 13 / genetics
  • Mitochondria / drug effects*
  • Mitochondria / metabolism
  • Neoplasm Invasiveness*
  • Phosphatidylinositol 3-Kinases / metabolism
  • RNA, Messenger / genetics
  • Reverse Transcriptase Polymerase Chain Reaction
  • Signal Transduction

Substances

  • DNA Primers
  • RNA, Messenger
  • Chloramphenicol
  • Adenosine Triphosphate
  • Phosphatidylinositol 3-Kinases
  • MAP Kinase Kinase 4
  • Matrix Metalloproteinase 13