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Splicing factor 3b subunit 4 (SF3b4) is closely associated with cancer development. As a core subunit of the SF3b complex, SF3b4 participates in regulating alternative splicing, and its abnormal expression is linked to the onset of malignant tumors. However, the role of SF3b4 in colorectal cancer (CRC) remains undefined. This study demonstrates that in CRC, E1A binding protein p300 (EP300) and CREB binding protein (CREBBP) regulate SF3b4 expression by activating Histone H3 lysine 27 acetylation (H3K27ac) on the SF3b4 promoter. Additionally, enhanced autophagy counteracts the proliferation-inhibitory effect of SF3b4 knockdown in CRC cells. Implications Statement: SF3b4 may promote CRC proliferation by enhancing cellular autophagy. SF3b4 acts as a potential oncogene in CRC tumorigenesis and progression. SF3b4 serves as a promising prognostic biomarker for CRC.
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http://dx.doi.org/10.62347/AHXI2343 | DOI Listing |
RNA Biol
December 2025
Department of Molecular Genetics, Center for RNA Biology, The Ohio State University, Columbus, OH, USA.
Pre-mRNA splicing, carried out in the nucleus by a large ribonucleoprotein machine known as the spliceosome, is functionally and physically coupled to the mRNA surveillance pathway in the cytoplasm called nonsense-mediated mRNA decay (NMD). The NMD pathway monitors for premature translation termination, which can result from alternative splicing, by relying on the exon junction complex (EJC) deposited on exon-exon junctions by the spliceosome. Recently, multiple genetic screens in human cell lines have identified numerous spliceosome components as putative NMD factors.
View Article and Find Full Text PDFWorld J Gastrointest Oncol
August 2025
Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu Province, China.
Background: Gastric cancer ranks among the leading malignancies worldwide, noted for its high morbidity and mortality, and remains a significant challenge to global public health.
Aim: To investigate the association between the expression of splicing factor 3b subunit 4 () and high mobility group box 1 () with the clinical characteristics and prognostic outcomes of gastric cancer patients.
Methods: A retrospective cohort study was conducted involving 114 individuals diagnosed with gastric cancer and admitted to our institution from January 2020 to December 2021.
medRxiv
August 2025
Division of Basic and Experimental Research, Brazilian National Cancer Institute, Rua Andre Cavalcanti 37, Rio de Janeiro, 20231-050, Brazil.
Acral melanoma (AM) is an aggressive melanoma subtype with limited therapeutic options and poor outcomes. In non-European descent and admixed populations, like those residing in Latin America, AM accounts for a significant proportion of cutaneous melanoma cases. Here, we performed comprehensive genomic and functional profiling of AM from a uniquely diverse Brazilian cohort.
View Article and Find Full Text PDFBirth Defects Res
August 2025
Department of Molecular Pathobiology, College of Dentistry, New York University, New York, New York, USA.
Background: Mandibulofacial dysostosis (MFD) is a congenital disorder characterized by defects in facial bones of neural crest origin. Nager syndrome combines many features of MFD with limb defects. Mutations in SF3B4, a gene located on chromosome 1 that encodes a protein of the spliceosome, were identified as a cause for Nager syndrome in approximately 60% of patients.
View Article and Find Full Text PDFAm J Cancer Res
June 2025
Department of Gastrointestinal Surgery, Affiliated Hospital of North Sichuan Medical College/Institute of Hepatobiliary Pancreatic and Intestinal Disease, North Sichuan Medical College Nanchong, Sichuan, China.
Splicing factor 3b subunit 4 (SF3b4) is closely associated with cancer development. As a core subunit of the SF3b complex, SF3b4 participates in regulating alternative splicing, and its abnormal expression is linked to the onset of malignant tumors. However, the role of SF3b4 in colorectal cancer (CRC) remains undefined.
View Article and Find Full Text PDF