Upregulation of matrix metalloproteinase-1 (MMP-1) expression in oral carcinomas of betel quid (BQ) users: roles of BQ ingredients in the acceleration of tumour cell motility through MMP-1.
Matrix metalloproteinases (MMPs) are commonly expressed in carcinomas including oral squamous cell carcinomas (OSCCs). On the other hand, some evidences suggested that ingredients of betel quid (BQ) inhibit the activity and/or expression of some MMPs thought to be the pathogenesis of oral submucous fibrosis. This study was to analyse whether MMP-1 expression is inhibited in OSCC specimens from BQ users and in cell lines survived from the challenge of BQ ingredients. We found that MMP-1 mRNA was expressed in all the tested 27 OSCC. Levels of MMP-1 mRNA and protein were significantly elevated in the tested five OSCC specimens than in their adjacent tissues (P<0.001 and 0.05, respectively). Esophageal carcinoma (CE81T/VGH) and OSCC (OECM-1) cell lines survived from the cytotoxic BQ extract (BQE) and arecoline selection process were found to express higher MMP-1 mRNA and protein levels, or to exhibit a significant acceleration of two-dimensional (2D) motility than their non-selected parental cells. The enhanced motility was further demonstrated to be specifically and significantly inhibited by the MMP-1 neutralizing antibody and/or by the transfection of an MMP-1 specific antisense oligodeoxynucleotide. These results suggest that in some carcinomas of the upper aerodigestive tract, BQ usage may upregulate MMP-1 expression in the survived tumour cells, and increase their mobility in an MMP-1-dependent manner.
Department of Dentistry, Chi Mei Medical Center, Tainan, Taiwan, ROC.
Chin-Hai
CH
Lee
Shyun-Yeu
SY
Liu
Mei-Huei
MH
Lin
Wei-Fan
WF
Chiang
Tai-Chi
TC
Chen
Wen-Tsung
WT
Huang
Da-Shiung
DS
Chou
Chang-Ta
CT
Chiu
Young-Chau
YC
Liu
D001114:Areca / Q000009:adverse effects*; D002294:Carcinoma, Squamous Cell / Q000139:chemically induced / Q000378:metabolism*; D002465:Cell Movement / Q000187:drug effects; D004938:Esophageal Neoplasms / Q000139:chemically induced / Q000378:metabolism; D005260:Female; D015972:Gene Expression Regulation, Neoplastic / Q000187:drug effects; D006801:Humans; D008297:Male; D020781:Matrix Metalloproteinase 1 / Q000378:metabolism*; D020784:Matrix Metalloproteinase 8 / Q000378:metabolism; D009062:Mouth Neoplasms / Q000139:chemically induced / Q000378:metabolism*; D009914:Oral Submucous Fibrosis / Q000139:chemically induced / Q000378:metabolism*; D018514:Plant Structures / Q000009:adverse effects* / Q000378:metabolism; D011230:Precancerous Conditions / Q000378:metabolism; D012333:RNA, Messenger / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D015854:Up-Regulation / Q000187:drug effects
D012333:RNA, Messenger; D020784:Matrix Metalloproteinase 8; D020781:Matrix Metalloproteinase 1