Targeting aberrant colon cancer-specific DNA methylation with lipoteichoic acid-deficient Lactobacillus acidophilus

Yaíma L. Lightfoot, Tao Yang, Bikash Sahay, Mansour Mohamadzadeh

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


Pathogenic autoinflammatory responses triggered by dysregulated microbial interactions may lead to intestinal disorders and malignancies. Previously, we demonstrated that a lipoteichoic acid (LTA)-deficient Lactobacillus acidophilus strain, NCK2025, ameliorated inflammationinduced colitis, significantly reduced the number of polyps in a colonic polyposis cancer model and restored physiological homeostasis in both cases. Nonetheless, the regulatory signals delivered by NCK2025 to reprogram the gastrointestinal microenvironment, and thus resist colonic cancer progression, remain unknown. Accumulating evidence suggest that epigenetic changes, in the presence and absence of pathogenic inflammation, can result in colorectal cancer (CRC). To test possible epigenetic modifications induced by NCK2025, the expression of epigenetically regulated, CRC-associated genes was measured with and without bacterial treatment. In vivo and in vitro, NCK2025 enhanced the expression of tumor suppressor genes that may regulate CRC development. Therefore, differential epigenetic regulation of CRC-related genes by NCK2025 represents a potential therapy against colitis-associated and sporadic CRC.

Original languageEnglish (US)
JournalGut Microbes
Issue number1
StatePublished - Jan 2013
Externally publishedYes


  • Aberrant epigenetic alterations
  • Colorectal cancer
  • DNA methylation
  • Inflammation
  • Lipoteichoic acid

ASJC Scopus subject areas

  • Microbiology (medical)
  • Gastroenterology
  • Infectious Diseases
  • Microbiology


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