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Genomic profiling of DVL-1 and its nuclear role as a transcriptional regulator in triple negative breast cancer.

Genes & cancer (2021-10-19)
Monica Sharma, Isabel Castro-Piedras, Austin Dwight Rodgers, Kevin Pruitt
ABSTRACT

Dishevelled-1 (DVL-1) mediates Wnt signals critical for development and cellular homeostasis. DVL-1 is also linked with tumorigenesis, however its association with specific breast cancer (BC) subtypes and how it contributes to tumorigenicity remains poorly studied. Herein, using bioinformatics and genomics analyses, we investigate the role of DVL-1 in different molecular subtypes of BC. Our results demonstrate that DVL-1 is highly expressed in triple-negative BC compared to non-cancer tissues and associated with various clinical factors that may contribute to poor prognosis and survival rate. Another critical knowledge gap which remains poorly investigated involves the role of DVL-1 in the nucleus. While the cytoplasmic role of DVL-1 as a signaling hub has been extensively studied, the nuclear role of DVL-1 remains virtually unexplored. Herein for the first time, we have performed ChIP-Seq analyses to identify genomic regions targeted and regulated by DVL-1, thus highlighting its potential role as a regulator of transcription. Furthermore, we observed that DVL-1 peaks co-localize with H3K27me3 and EZH2, a repressive epigenetic mark and a histone methyltransferase respectively. Overall, our findings emphasize the importance of DVL-1 with TNBC-related pathology and identified unexpected gene targets of DVL-1, that may help explain the complexity of aberrant Wnt signaling in cancer.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Insulin solution from bovine pancreas, 10 mg/mL insulin in 25  mM HEPES, pH 8.2, BioReagent, sterile-filtered, suitable for cell culture
Sigma-Aldrich
IgG from rabbit serum, reagent grade, ≥95% (SDS-PAGE), essentially salt-free, lyophilized powder
Sigma-Aldrich
Anti-DVL1 antibody produced in rabbit, ~1.5 mg/mL, affinity isolated antibody, buffered aqueous solution, antigen mol wt ~85 kDa