Abstract
Mammalian myeloid and epithelial cells express many antimicrobiotic peptides that contribute to innate host defense against invading microbes. In the present study, a 27-mer peptide of the C-terminal domain (hCAP18 109-135) and analogs of the antimicrobial peptide human cathelicidin LL-37/human cationic antimicrobial protein 18 (hCAP18) were examined for tumoricidal activity. In vitro results showed that hCAP18109-135 induced apoptosis in human oral squamous cell carcinoma (OSCC), SAS-H1 cells. The hCAP18109-135 induced mitochondrial depolarization and apoptosis in SAS-H1 cells, but not in healthy human gingival fibroblasts (HGF) and human keratinocyte line HaCaT cells. Caspases were not activated during hCAP18 109-135-induced apoptosis in SAS-H1 cells. The results indicate that hCAP18109-135 may induce caspase-independent apoptosis in OSCC but not in normal cells. hCAP18109-135 can therefore be a useful anti-tumor therapeutic agent in the treatment of OSCC.
Original language | English |
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Pages (from-to) | 185-194 |
Number of pages | 10 |
Journal | Cancer Letters |
Volume | 212 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2004 Aug 30 |
Externally published | Yes |
Keywords
- Apoptosis
- C-terminal domain of hCAP18 peptides
- Human oral squamos cell carcinoma cells
- Hydrophobicity
- Mitochondrial membrane potential
ASJC Scopus subject areas
- Oncology
- Cancer Research