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LAMC1 expression patterns and associated clinical features of endometrial cancer
( Haruko Irie-kunitomi ),( Yusuke Kobayashi ),( Kouji Banno ),( Kenta Masuda ),( Megumi Yanokura ),( Eichiro Tominaga ),( Daisuke Aoki ) 대한산부인과학회 2016 대한산부인과학회 학술대회 Vol.102 No.-
Objective: Laminins are one of the major components of the extracellular matrix. Recent studies have indicated the relationship between specific laminin expression profiles and cancer progression. Upregulation of LAMC1, which encodes laminin-γ1, is of particular note because this is related to aggressive behavior of cancer cells of various origins. This study aimed to analyze the influence of LAMC1 expression on the clinical features of endometrial cancer. Methods: The subjects were patients with endometrial cancer (EC), atypical endometrial hyperplasia complex (AEHC) or normal endometrium (NE) who underwent hysterectomy during January 2008 and December 2011 at our institute. The study included 100 cases of EC, 9 of AEHC, and 16 NE. LAMC1 immunohistochemical staining was evaluated as negative or positive by two independent evaluators blinded from clinical information. Patient characteristics and clinical outcomes were obtained retrospectively from clinical records. This study was approved by our institutional review board. Results: LAMC1 expression was significantly elevated in EC compared to AEHC and NE (p<0.05). Endometrioid (EM) grade 3, serous and clear cell adenocarcinoma indicated frequent LAMC1 expression compared to EM grade 1 and 2 (85.2% vs. 51.3%, p<0.05). Patients with advanced FIGO surgical stage (stage III and IV) and positive lymphovascular space invasion had a significantly higher LAMC1 expression rate compared to early stage cases (83.7% vs. 63.2%, p<0.05) and cases without lymphovascular space invasion (86.3% vs. 61.0%, p<0.05), respectively. Kaplan-Meier analysis revealed that LAMC1 positive cases had a significantly shorter progression-free survival (p<0.05) and a tendency to have a reduced overall survival (p=0.052). Conclusion: In endometrial cancer, LAMC1 expression is related to aggressive tumor behavior and reduced progression free survival.
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