The deregulation of protein translational machinery and the oncogenic role of several translation initiation factors have been extensively investigated. This study aimed to investigate the role of eukaryotic translation initiation factor 2S2 (eIF2S2, also known as eIF2β) in cervical carcinogenesis. Immunohistochemical analysis of human cervical carcinoma tissues revealed a stage-specific increase in eIF2S2 expression. The knockdown of eIF2S2 in human cervical cancer (SiHa) cells significantly reduced growth and migration properties, whereas its overexpression demonstrated the opposite effect. Immunoprecipitation and Bimolecular fluorescence complementation (BiFC) assay confirmed the previous photo array finding of the interaction between eIF2S2 and SMAD4 to understand the tumorigenic mechanism of eIF2S2. The results indicated that the N-terminus of eIF2S2 interacts with the MH-1 domain of SMAD4. The interaction effect between eIF2S2 and SMAD4 was further evaluated. The knockdown of eIF2S2 increased SMAD4 expression in cervical cancer cells without changing SMAD4 mRNA expression, whereas transient eIF2S2 overexpression reduced SMAD4 expression. This indicates the possibility of post-translational regulation of SMAD4 expression by eIF2S2. Additionally, eIF2S2 overexpression was confirmed to weaken the expression and/or promoter activity of p15 and p27, which are SMAD4-regulated antiproliferative proteins, by reducing SMAD4 levels. Therefore, our study indicated the pro-tumorigenic role of eIF2S2, which diminishes both SMAD4 expression and function as a transcriptional factor in cervical carcinogenesis.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11535292 | PMC |
| http://dx.doi.org/10.4062/biomolther.2024.024 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
The Combined Impact of Curcumin: Piperine and Sorafenib on microRNAs and Different Pathways in Breast Cancer Cells.
Indian J Clin Biochem
January 2025
Hormones Department, Medical Research and Clinical Studies Institute, National Research Centre, Giza, Egypt.
Unlabelled: Breast cancer is the most common malignancy in the women. Chemotherapy is a crucial part of breast cancer treatment especially for advanced and metastatic forms of the disease. However, chemotherapy has limitations due to tumor heterogeneity, chemoresistance, and side effects.
View Article and Find Full Text PDFSmall Extracellular Vesicles from Young Healthy Human Plasma Inhibit Cardiac Fibrosis After Myocardial Infarction via miR-664a-3p Targeting SMAD4.
Int J Nanomedicine
January 2025
Department of Emergency and Critical Care Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, People's Republic of China.
Purpose: Cardiac fibrosis, a key contributor to ventricular pathologic remodeling and heart failure, currently lacks effective therapeutic approaches.
Patients And Methods: Small extracellular vesicles from young healthy human plasma (Young-sEVs) were characterized via protein marker, transmission electron microscopy, and nanoparticle tracking analysis, then applied in cellular models and mouse models of cardiac fibrosis. Western blotting and qRT-PCR were used to identify protective signaling pathways in cardiac fibroblasts (CFs).
Metastatic melanoma: An integrated analysis to identify critical regulators associated with prognosis, pathogenesis and targeted therapies.
PLoS One
January 2025
Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran.
Metastatic melanoma causes a high rate of mortality. We conducted an integrated analysis to identify critical regulators associated with the prognosis, pathogenesis, and targeted therapies of metastatic-melanoma. A microarray dataset, GSE15605, including 12 metastatic-melanoma and sixteen normal skin (NS) samples, were obtained from the GEO database.
View Article and Find Full Text PDFGenomic profiles and their associations with microsatellite instability status, tumor mutational burden, and programmed death ligand 1 expression in Chinese patients with colorectal cancer.
J Gastrointest Oncol
December 2024
Department of Traditional Chinese Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China.
Background: Colorectal cancer (CRC) is among the most prevalent malignancies globally, with a rising incidence observed in younger demographics. Despite surgical resection remaining the cornerstone of treatment, metastatic CRC poses significant therapeutic challenges. Immunotherapy, a mode of treatment that leverages the patient's immune system, presents a promising frontier in CRC management, particularly for late-stage cases with limited treatment options.
View Article and Find Full Text PDFAn Overview of Invasive Ductal Carcinoma (IDC) in Women's Breast Cancer.
Curr Mol Med
January 2025
Division of Biological and Health Sciences, University of Pittsburgh, 300 Campus Drive, Bradford PA 16701.
Invasive ductal carcinoma (IDC) is the most common type of breast cancer, primarily affecting women in the United States and across the world. This review summarizes key concepts related to IDC causes, treatment approaches, and the identification of biological markers for specific prognoses. Furthermore, we reviewed many studies, including those involving patients with IDC and ductal carcinoma in situ (DCIS) that progressed to IDC.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!