[Expression of RECK, RAGE and MMP-9 in nasopharyngeal carcinoma and its significance].
OBJECTIVE
To investigate the expression and the relativity of RECK,RAGE and MMP-9 in nasopharyngeal carcinoma (NPC) tissues.


METHODS
RECK, RAGE and MMP-9 were detected with immunohistochemical methods in 64 NPC specimens(30 cases with cervical lymph nodes metastasis, while the other 34 cases are not) and 30 specimens with chronic nasopharyngitis.


RESULTS
RECK hardly expressed in chronic nasopharyngitis and NPC tissues, However, strong expression of RECK could be seen in the surrounding inflammatory cells and matrix of cancer nests. The positive rates of RECK in NPC with and without cervical lymph nodes metastasis were 3.3% (1/30) and 11.8% (4/34), separately, There was no statistical significance between the groups (P > 0.05). The positive rates of RAGE in chronic nasopharyngitis and NPC tissues were 100% (30/30) and 70.3% (45/64) respectively, while MMP-9 were 46.7% (14/30) and 78.1% (50/64). The positive rates of RAGE in NPC with and without cervical lymph nodes metastasis were 86.7% (26/30) and 55.9% (19/34) separately, whereas MMP-9 were 90.0% (27/30) and 67.7% (23/34) respectively. They all showed statistical significance between the groups. MMP-9 had a negative correlation with RECK (r = -0.369, P < 0.05) and a positive correlation with RAGE in NPC (r = 0.471, P < 0.05).


CONCLUSIONS
The expression of RECK and RAGE in NPC were down-regulated, the expression of MMP-9 was up-regulated. While the expression of RECK in NPC with cervical lymph nodes metastasis was down-regulated, while RAGE and MMP-9 were up-regulated. The abnormal expression of the three genes may be related to the progression of NPC. RECK and RAGE may be involved in the invasion and metastasis of NPC by regulating the expression of MMP-9.
Department of Otolaryngology, the Teaching Hospital of Fujian Medical University, Zhongshan Hospital of Xiamen University, Xiamen, 361004, China.
Ronghua
R
Li
Yanfei
Y
Deng
D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D058851:GPI-Linked Proteins / Q000378:metabolism*; D017127:Glycation End Products, Advanced / Q000378:metabolism; D006801:Humans; D008297:Male; D020780:Matrix Metalloproteinase 9 / Q000378:metabolism*; D008875:Middle Aged; D009303:Nasopharyngeal Neoplasms / Q000378:metabolism* / Q000473:pathology; D009361:Neoplasm Invasiveness; D009362:Neoplasm Metastasis; D012333:RNA, Messenger / Q000235:genetics; D000067759:Receptor for Advanced Glycation End Products / Q000378:metabolism*; D011956:Receptors, Cell Surface / Q000096:biosynthesis; D055815:Young Adult
D058851:GPI-Linked Proteins; D017127:Glycation End Products, Advanced; C115460:RECK protein, human; D012333:RNA, Messenger; D000067759:Receptor for Advanced Glycation End Products; D011956:Receptors, Cell Surface; D020780:Matrix Metalloproteinase 9