نوع مقاله : Original Articles
نویسندگان
1 دندانپزشک، کمیته تحقیقات دانشجویی، دانشکدهی دندانپزشکی، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران.
2 دانشیار، مرکز تحقیقات دندانپزشکی، گروه پاتولوژی دهان، فک و صورت، دانشکدهی دندانپزشکی، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران
3 دندانپزشک، کمیته تحقیقات دانشجویی، دانشکدهی دندانپزشکی، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران
4 دانشیار، مرکز تحقیقات مواد دندانی، گروه پاتولوژی دهان، فک و صورت، دانشکدهی دندانپزشکی، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Introduction: Oral squamous cell carcinoma (OSCC) is the sixth most common cancer in the world. Langerhans cells (LCs) as antigen-presenting cells in the epithelium constitute the front line of immune defense. This study aimed to compare the frequency of LCs in different stages of oral cancer progression.
Materials and Methods: In this descriptive-analytical and cross-sectional study, 80 tissue samples were examined in four groups of 20, including: 1) benign keratosis, 2) epithelial dysplasia, 3) OSCC (without cervical lymph node involvement), and 4) OSCC
(with cervical lymph node involvement). Immunohistochemical staining with CD1a marker was used to identify LCs. Data were analyzed using ANOVA and Scheffe post hoc tests, and the significance level was considered P < 0.05.
Results: The density of LCs from benign keratosis (6.75 ± 2.51)) was significantly increased in epithelial dysplasia (38.7 ± 7.14) and OSCC without lymph node involvement (43.35 ± 19.21). However, in OSCC with cervical lymph node involvement, the cell density was significantly reduced (8.41 ± 13.15), which was significantly lower than that in dysplasia and OSCC without lymph node involvement (P < 0.001).
Conclusion: The density of LCs during oral cancer development follows a biphasic pattern of “increase and then decrease”. The sharp decrease of these cells in advanced stages is a hallmark of a successful immune evasion mechanism by the tumor, which appears to be a precursor to lymphatic invasion. Therefore, quantitative assessment of LCs density could serve as a valuable prognostic tool for predicting risk in patients with OSCC.
کلیدواژهها [English]