LDOC1 regulator of NF-κB signaling (LDOC1)

LDOC1 regulator of NF-κB signaling (LDOC1) is a nuclear protein encoded by the LDOC1 gene, characterized by a leucine zipper-like motif and a proline-rich SH3-binding domain[1][3]. It acts as a negative regulator of NF-κB transcriptional activity, functioning as a tumor suppressor by inhibiting factors involved in inflammation, cell survival, and proliferation[2][4]. LDOC1 is commonly down-regulated in multiple cancer types, often due to epigenetic silencing via promoter methylation. Restoring LDOC1 activity can suppress NF-κB-dependent cytokine production (e.g., IL-6) and may resensitize tumor cells to chemotherapy[2]. LDOC1 expression is associated with clinical outcomes in certain cancers, making it a candidate prognostic biomarker. Direct pharmacological targeting is not currently available, but its regulation via epigenetic therapies is under investigation[2].

Other names

Protein LDOC1BCUR1Mar7Mart7SIRH7RTL7Leucine zipper protein down-regulated in cancer cellsSushi-Ichi retrotransposon homolog 7mammalian retrotransposon-derived 7retrotransposon Gag like 7breast cancer up-regulated 1leucine zipper down-regulated in cancer 1

Epigenetic modulation (e.g., demethylation leading to LDOC1 re-expression and subsequent NF-κB signaling inhibition)[2]