TY - JOUR
T1 - Myofibroblasts in stroma of odontogenic cysts and tumors can contribute to variations in the biological behavior of lesions
AU - Vered, Marilena
AU - Shohat, Izhar
AU - Buchner, Amos
AU - Dayan, Dan
N1 - Funding Information:
The study was supported, in part, by the Ernst and Tova Turnheim (Nee Alexandrovitz) Clinical Research Fund in Dentistry and, in part, by the Ed and Herb Stein Chair in Oral Pathology, Tel Aviv University.
PY - 2005/11
Y1 - 2005/11
N2 - Stromal myofibroblasts (MF) have the potential to facilitate progression of neoplastic epithelial lesions that could contribute to their biological behavior. To assess immunohistochemically the frequency of stromal MF in different odontogenic cysts and tumors and correlate it to their aggressive biological behavior. The study included cases of dentigerous cyst (DC, n = 7), odontogenic keratocyst-parakeratinized type (OKC-P, n = 8), orthokeratinized type (OKC-O, n = 9), ameloblastic fibroma/fibro-odontoma (AMF/O, n = 11), unicystic ameloblastoma (UAM, n = 6), and solid ameloblastoma (SAM, n = 7). Cases of oral squamous cell carcinoma (SCC, n = 5) served as control. Myofibroblast frequency was assessed as the number of alpha smooth muscle actin (αSMA)-positive stromal cells in 10 high-power fields, presented as the mean number of positive cells per field. Counts showed that mean number of positive cells in OKC-P (25.7 ± 11.4) was significantly higher than in DC (8.7 ± 11.6) (p = 0.024) and in SAM (29 ± 7) it was significantly higher than in UAM (14.9 ± 4.9) and AMF/O (5.6 ± 7.5) (p < 0.001). Counts in OKC-P and SAM were not significantly different from SCC (21.3 ± 5.3) (p > 0.05). The high frequency of stromal MF in known aggressive odontogenic lesions, such as OKC-P and SAM, implies that MF can contribute to the biological behavior of these odontogenic lesions. Various pharmacological agents that control stromal MF can be used as an aid to reduce extensive and mutilating surgery in cases of remarkably aggressive odontogenic lesions.
AB - Stromal myofibroblasts (MF) have the potential to facilitate progression of neoplastic epithelial lesions that could contribute to their biological behavior. To assess immunohistochemically the frequency of stromal MF in different odontogenic cysts and tumors and correlate it to their aggressive biological behavior. The study included cases of dentigerous cyst (DC, n = 7), odontogenic keratocyst-parakeratinized type (OKC-P, n = 8), orthokeratinized type (OKC-O, n = 9), ameloblastic fibroma/fibro-odontoma (AMF/O, n = 11), unicystic ameloblastoma (UAM, n = 6), and solid ameloblastoma (SAM, n = 7). Cases of oral squamous cell carcinoma (SCC, n = 5) served as control. Myofibroblast frequency was assessed as the number of alpha smooth muscle actin (αSMA)-positive stromal cells in 10 high-power fields, presented as the mean number of positive cells per field. Counts showed that mean number of positive cells in OKC-P (25.7 ± 11.4) was significantly higher than in DC (8.7 ± 11.6) (p = 0.024) and in SAM (29 ± 7) it was significantly higher than in UAM (14.9 ± 4.9) and AMF/O (5.6 ± 7.5) (p < 0.001). Counts in OKC-P and SAM were not significantly different from SCC (21.3 ± 5.3) (p > 0.05). The high frequency of stromal MF in known aggressive odontogenic lesions, such as OKC-P and SAM, implies that MF can contribute to the biological behavior of these odontogenic lesions. Various pharmacological agents that control stromal MF can be used as an aid to reduce extensive and mutilating surgery in cases of remarkably aggressive odontogenic lesions.
KW - Biological aggressiveness
KW - Odontogenic cysts
KW - Odontogenic tumors
KW - Stromal myofibroblasts
UR - http://www.scopus.com/inward/record.url?scp=26444509764&partnerID=8YFLogxK
U2 - 10.1016/j.oraloncology.2005.06.011
DO - 10.1016/j.oraloncology.2005.06.011
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C2 - 16139563
AN - SCOPUS:26444509764
SN - 1368-8375
VL - 41
SP - 1028
EP - 1033
JO - Oral Oncology
JF - Oral Oncology
IS - 10
ER -
