Abstract:
Objective
To explore the relationship and correlation between RECK and matrix metalloproteinase-2 (MMP-2) expression and the clinnical biological behavior of ameloblastoma (AB).
Methods
EliVisionTM plus 2-step immunochemistry staining method was employed to detect protein expression of RECK and MMP-2 in the paraffin-embedded specimens of 69 cases of AB (including 45 cases of primary AB and 24 cases of recurrent AB), 6 cases of ameloblastic carcinoma and 16 cases of keratocystic odontogenic tumor (KCOT), and mRMA expression of RECK and MMP-2 in fresh specimens of 22 cases of AB (including 12 cases of primary AB and 10 cases of recurrent AB), 2 cases of ameloblastic carcinoma and 16 cases of KCOT was detected using reverse transcription-polymerase chain reaction (RT-PCR). All data were analyzed by SPSS13.0 software package.
Results
Immunoreactivity for RECK sequentially reduced in KCOT, AB and ameloblstic carcinoma (P <0.05), and its expression showed downregulation in recurrent AB compared with primary AB (P <0.01). Immunoreactivity for MMP-2 in AB and ameloblastic carcinoma enhanced compared with KCOT (P <0.05). RECK had a negative relationship with MMP-2 in protein expression in AB (r=-0.431). The expression of RECK mRNA in AB reduced compared with KCOT (P <0.001), and there was no expression in ameloblsic carcinoma. The mRNA level of MMP-2 in AB increased compared with KCOT (P <0.001), and there was a high level of expression in ameloblastic carcinoma. RECK mRNA in recurrent AB decreased compared with primary AB (P <0.05), but MMP-2 mRNA showed no siginificant difference between recurrent AB and primary AB. RECK had no relationship with MMP-2 in mRNA expression in ameloblastoma.
Conclusions
Decreased or absent expression of RECK and increased expression of MMP-2 may be associated with the clinnical biological behavior of AB,and RECK may participate in the invasion, recurrence and malignant transformation of AB by regulating MMP-2 at post-transcriptional level.
Key words:
RECK,
MMP-2,
Ameloblstoma,
Immunohistochemistry,
RT-PCR
Bin ZHANG, Zhi-ying XU, Hong-zhang HUANG, Hong-liang XIE. Expression of RECK and matrix metalloprotease-2 in ameloblastoma and their associativity[J]. Chinese Journal of Stomatological Research(Electronic Edition), 2009, 3(04): 382-390.