Key result
Elevated SNTB1 expression in colorectal cancer correlated with malignancy and poor prognosis, and silencing SNTB1 suppressed tumor growth and stemness via the β-catenin pathway.
Why the study?
Beta-1 syntrophin (SNTB1) modulates intracellular signaling events, but its physiological role is poorly understood, prompting an evaluation of its expression, clinical relevance, and mechanism in colorectal cancer.
Does silencing SNTB1 suppress tumor growth and cancer stemness in colorectal cancer?
Does silencing SNTB1 suppress tumor growth and cancer stemness in colorectal cancer?
SNTB1 promotes colorectal cancer progression and stemness via the Wnt/β-catenin signaling pathway, highlighting its potential as a therapeutic target.
SNTB1 may associate with CRC progression; leaves open biomarker or target validation in prospective studies.
Background: Beta-1 syntrophin (SNTB1) is an intracellular scaffold protein that provides a platform for the formation of signal transduction complexes, thereby modulating and coordinating various intracellular signaling events and crucial cellular processes. However, the physiological role of SNTB1 is poorly understood. This study aims to explore the role of SNTB1 in colorectal cancer (CRC) tumorigenesis and progression, with particular focus on SNTB1’s expression pattern, clinical relevance, and possible molecular mechanism in CRC development.Methods: SNTB1 expression was analyzed in both clinical tissues and The Cancer Genome Atlas (TCGA) database. Real-time polymerase chain reaction (PCR), Western blot, and immunohistochemical assays were used to detect the relative mRNA and protein levels of SNTB1. Statistical analysis was performed to examine the correlation between SNTB1 expression and the clinicopathological characteristics of patients with CRC. Bioinformatics gene set enrichment analysis (GSEA), Western blot, luciferase assay, and agonist recovery assays were conducted to evaluate the relevance of SNTB1 and the β-catenin signaling pathway in CRC. A flow cytometry-based Hoechst 33342 efflux assay was applied to assess the proportion of the side population (SP) within total CRC cells.Results: Elevated levels of SNTB1 were identified in CRC tissues and cell lines. The elevation of SNTB1 was positively correlated with the degree of malignancy and poor prognosis in CRC. We further revealed that, by modulating the β-catenin signaling pathway, silencing SNTB1 expression suppressed tumor growth and cancer stemness in vitro, as well as tumorigenesis in vivo.Conclusions: These findings suggest that SNTB1 plays a crucial role in colorectal tumorigenesis and progression by modulating β-catenin signaling and the stemness maintenance of cancer cells.
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Liang et al. (2021) studied colorectal cancer. SNTB1 expression was evaluated. Elevated SNTB1 expression in colorectal cancer correlated with malignancy and poor prognosis, and silencing SNTB1 suppressed tumor growth and stemness via the β-catenin pathway.
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