Predominant Rab-GTPase amplicons contributing to oral squamous cell carcinoma progression to metastasis

被引:25
作者
da Silva, Sabrina Daniela [1 ,2 ,3 ,4 ,5 ,6 ,7 ]
Marchi, Fabio Albuquerque [8 ,9 ,10 ]
Xu, Bin [2 ,3 ,4 ,5 ]
Bijian, Krikor [2 ,3 ,4 ,5 ]
Alobaid, Faisal [1 ]
Mlynarek, Alex [1 ]
Rogatto, Silvia Regina [8 ,9 ]
Hier, Michael [1 ]
Kowalski, Luiz Paulo [6 ,7 ]
Alaoui-Jamali, Moulay A. [2 ,3 ,4 ,5 ]
机构
[1] Sir Mortimer B Davis Jewish Hosp, Dept Otolaryngol Head & Neck Surg, Montreal, PQ, Canada
[2] McGill Univ, Segal Canc Ctr, Montreal, PQ H3A 2T5, Canada
[3] McGill Univ, Lady Davis Inst Med Res, Sir Mortimer B Davis Jewish Gen Hosp, Dept Med, Montreal, PQ H3A 2T5, Canada
[4] McGill Univ, Fac Med, Dept Oncol, Montreal, PQ H3A 2T5, Canada
[5] McGill Univ, Fac Med, Dept Pharmacol & Therapeut, Montreal, PQ H3A 2T5, Canada
[6] AC Camargo Canc Ctr, Dept Head & Neck Surg & Otorhinolaryngol, Sao Paulo, Brazil
[7] Natl Inst Sci & Technol Oncogen INCITO, Sao Paulo, Brazil
[8] UNESP, Fac Med, Dept Urol, NeoGene Lab, Botucatu, SP, Brazil
[9] AC Camargo Canc Ctr, Int Res Ctr CIPE, Sao Paulo, Brazil
[10] Univ Sao Paulo, Interinst Grad Program Bioinformat, BR-05508 Sao Paulo, Brazil
基金
巴西圣保罗研究基金会;
关键词
aCGH; genomic; metastasis; oral squamous cell carcinoma; rab GTPases; LYMPH-NODE METASTASIS; HEAD; NECK; EXPRESSION; PROTEIN; MACHINERY; MIGRATION; TRANSPORT; MODEL; GENE;
D O I
10.18632/oncotarget.4277
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Metastatic oral squamous cell carcinoma (OSCC) is frequently associated with recurrent gene abnormalities at specific chromosomal loci. Here, we utilized array comparative genomic hybridization and genome-wide screening of metastatic and non-metastatic tongue tumors to investigate genes potentially contributing to OSCC progression to metastasis. We identified predominant amplifications of chromosomal regions that encompass the RAB5, RAB7 and RAB11 genes (3p24-p22, 3q21.3 and 8p11-12, respectively) in metastatic OSCC. The expression of these Rab GTPases was confirmed by immunohistochemistry in OSCC tissues from a cohort of patients with a follow-up of 10 years. A significant overexpression of Rab5, Rab7 and Rab11 was observed in advanced OSCC cases and co-overexpression of these Rabs was predictive of poor survival (log-rank test, P = 0.006). We generated a Rab interaction network and identified central Rab interactions of relevance to metastasis signaling, including focal adhesion proteins. In preclinical models, mRNA and protein expression levels of these Rab members were elevated in a panel of invasive OSCC cell lines, and their down-regulation prevented cell invasion at least in part via inhibition of focal adhesion disassembly. In summary, our results provide insights into the cooperative role of Rab gene amplifications in OSCC progression and support their potential utility as prognostic markers and therapeutic approach for advanced OSCC.
引用
收藏
页码:21950 / 21963
页数:14
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