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Published in: Tumor Biology 6/2012

01-12-2012 | Research Article

Tumor suppressor TSLC1 is implicated in cell proliferation, invasion and apoptosis in laryngeal squamous cell carcinoma by regulating Akt signaling pathway

Authors: Baocai Lu, Wenyu Di, Huimin Wang, Huimin Ma, Jinsong Li, Qunmei Zhang

Published in: Tumor Biology | Issue 6/2012

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Abstract

Overwhelming evidence has demonstrated that TSLC1 (tumor suppressor in lung cancer 1), a novel tumor suppressor, is crucially implicated in various biological processes including progression, proliferation and apoptosis during tumorigenesis. However, the exact functions and molecular details of TSLC1 in laryngeal cancer remain ill-defined. Here, the expression of TSLC1 in laryngeal squamous cell carcinoma (LSCC) tissues and cells was detected, and the biological roles of TSLC1 in LSCC cells were investigated. The results showed that expressions of TSLC1 mRNA and protein were significantly reduced in LSCC tissues with low expression in 18 of 85 (21.18 %) and 16 of 85 (18.82 %), respectively. Additionally, statistical analysis revealed a significant correlation of TSLC1 expression with TNM staging and lymph node metastases (P < 0.05), but not related to age, gender and tumor differentiation (P > 0.05). Elevation of TSLC1 level inhibited cell proliferation, reduced cell invasion in vitro and induced cell apoptosis in Hep-2 cells, most importantly, TSLC1 upregulation decreased the level of pAkt, but not changed the level of total Akt in Hep-2 cells. Stepwise investigations demonstrated that overexpression of TSLC1 in Hep-2 cells increased caspase-3 activity and expressions of bax and p21 proteins but decreased the levels of bcl-2, MMP-2 and MMP-9 proteins. These data suggest that TSLC1 may exert essential roles in the progression and development of LSCC, and thus TSLC1 may be a potential molecular target for LSCC treatment.
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Metadata
Title
Tumor suppressor TSLC1 is implicated in cell proliferation, invasion and apoptosis in laryngeal squamous cell carcinoma by regulating Akt signaling pathway
Authors
Baocai Lu
Wenyu Di
Huimin Wang
Huimin Ma
Jinsong Li
Qunmei Zhang
Publication date
01-12-2012
Publisher
Springer Netherlands
Published in
Tumor Biology / Issue 6/2012
Print ISSN: 1010-4283
Electronic ISSN: 1423-0380
DOI
https://doi.org/10.1007/s13277-012-0460-x

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