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Updated: Jun 21, 2026

Static Adhesion Assay for the Study of Integrin Activation in T Lymphocytes
Published on: June 13, 2014
Lef-1 isoforms regulate different target genes and reduce cellular adhesion.
Sarah Jesse1, Alexander Koenig, Volker Ellenrieder
1Department of Internal Medicine I, University of Ulm, D-89081 Ulm, Germany.
Lymphoid enhancer factor 1 (Lef-1) isoforms in pancreatic cancer influence cell behavior. Lef-1 Deltaexon VI promotes migration, while Lef-1 FL enhances proliferation.
Area of Science:
- Molecular biology
- Cancer research
- Cell signaling
Background:
- Lymphoid enhancer factor 1 (Lef-1) is a key nuclear transducer in Wnt signaling, crucial for embryogenesis and cancer.
- Lef-1, with beta-catenin, regulates transcription, impacting cell proliferation, differentiation, and migration.
- Increased Lef-1 expression is linked to advanced stages in human pancreatic cancer.
Purpose of the Study:
- To investigate the role of alternatively spliced Lef-1 isoforms in pancreatic cancer.
- To compare the cellular effects of full-length Lef-1 (Lef-1 FL) and a novel shorter transcript (Lef-1 Deltaexon VI).
Main Methods:
- Reverse transcription-polymerase chain reaction (RT-PCR) to detect Lef-1 transcripts in pancreatic tumors.
- Transient expression of Lef-1 variants in pancreatic carcinoma cells.
- Analysis of E-cadherin expression, cellular aggregation, cell migration, c-myc, and cyclin D1 levels.
Main Results:
- Two Lef-1 transcripts, Lef-1 FL and Lef-1 Deltaexon VI, were identified in pancreatic tumors.
- Lef-1 Deltaexon VI inhibited E-cadherin expression independently of beta-catenin, reduced cell aggregation, and increased migration.
- Lef-1 FL, in conjunction with beta-catenin, induced c-myc and cyclin D1, enhancing cell proliferation.
Conclusions:
- Alternative splicing of Lef-1 generates isoforms with distinct cellular functions in pancreatic cancer.
- Lef-1 isoforms differentially regulate the balance between proliferative and migratory phenotypes in pancreatic carcinoma cells.
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