Abstract
The transforming growth factor-β1 (TGF-β1) signaling pathway is important in human oral squamous cell carcinoma (OSCC). Accordingly, the aims of this study were to evaluate the effect of antisense TGF-β1 oligonucleotides (ODNs) on OSCC in cell culture and in a xenograft model, as well as to evaluate any effects ODNs have on proliferating cell nuclear antigen (PCNA) and matrix metalloproteinase-2 (MMP-2) expression in the xenograft model. We performed real-time cell electronic sensing (RT-CES) to determine the effect of antisense TGF-β1 ODNs on SCC-9 cell growth. To examine the in vivo effect of antisense TGF-β1 ODN therapy, SCC-9 cells were grafted into nude mice. Antisense ODNs were injected into the mass daily. Tumor size, body weight and duration of survival were assessed daily. Specimens from the main mass were used for immunohistochemical staining to analyze PCNA and MMP-2 expression. In vitro treatment with antisense TGF-β1 ODNs decreased TGF-β1 expression and growth of SCC-9 cells. In the xenograft model, the antisense TGF-β1 ODN group exhibited a significantly decreased tumor growth rate compared to the control, which received Dulbecco's modified Eagle's medium (DMEM) (P=0.022). However, mean survival time and body weig...Continue Reading
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