Somatostatin (SST) exhibits a wide range of physiological functions, including the regulation of tumor cell growth. Octreotide (OCT) is a synthetic analogue of SST that can be used to slow gastrointestinal bleeding, inhibit the release of growth hormone and impede gastrointestinal tumor growth. The aim of the present study was to investigate the molecular mechanism of OCT underlying the inhibition of gastric cancer cell proliferation. Proteins of interest were detected using western blotting, and the zinc finger protein (ZAC)-P300 complex was quantified using co-immunoprecipitation. P300-histone acetyltransferase (P300-HAT) activity was determined spectrophotometrically. The results showed that OCT decreased the phosphorylation of Akt which caused the level of ZAC to increase. In turn, the interaction between ZAC and P300 increased the activity of P300-HAT; ultimately, the phosphorylation of serine 10 in histone H3 (pS10-H3) was decreased and the acetylation of lysine 14 in histone H3 (acK14-H3) was increased. These results suggest that OCT attenuates SGC-7901 cell proliferation by enhancing P300-HAT activity through the interaction of ZAC and P300, causing a reduction in pS10-H3 and an increase in acK14-H3. These findings provide insight for future research on OCT and further demonstrate the potential of OCT to be used as a therapeutic agent for gastric cancer.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.3892/or.2017.5451 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
SP-1-activated LINC01016 overexpression promotes gastric cancer invasion and metastasis through inhibiting EIF4A3-mediated MMP9 mRNA decay.
Cell Death Dis
January 2025
Department of Pathology, Qilu Hospital and School of Basic Medical Sciences Shandong University, Jinan, Shandong, PR China.
Long noncoding RNAs (lncRNAs) are key regulators during gastric cancer (GC) development and may be viable treatment targets. In the present study, we showed that the expression of the long intergenic noncoding RNA 01016 (LINC01016) is significantly higher in GC tissues with lymph node metastasis (LNM) than those without LNM. LINC01016 overexpression predicts a poorer relapse-free survival (RFS) and overall survival (OS).
View Article and Find Full Text PDFChemoprevention Strategies for Precancerous Gastric Lesions Beyond Helicobacter pylori Eradication.
QJM
January 2025
Peking University Traditional Chinese Medicine Clinical Medical School (Xiyuan), Peking University Health Science Center, Beijing, 100091, People's Republic of China.
Gastric cancer (GC) is a significant global health challenge, particularly in high-incidence regions like East Asia. Despite improvements in screening and treatment, the progressive nature of precancerous lesions-such as atrophic gastritis, intestinal metaplasia, and dysplasia-necessitates effective prevention strategies. This review evaluates the role of chemoprevention in GC, focusing on agents designed to target these precancerous lesions.
View Article and Find Full Text PDFSLC26A9 promotes the initiation and progression of breast cancer by activating the PI3K/AKT signaling pathway.
Biochim Biophys Acta Mol Cell Res
January 2025
Department of General Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, China; Department of Thyroid and Breast Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, China. Electronic address:
SLC26A9 is a member of the Slc26a family of multifunctional anion transporters that function as Cl channels in the stomach. We reported for the first time that SLC26A9 is involved in gastric tumorigenesis. However, the role of SLC26A9 in breast cancer has not yet been investigated.
View Article and Find Full Text PDFDevelopment of Chimeric Nanobody-Granzyme B Functionalized Ferritin Nanoparticles for Precise Tumor Therapy.
Pharmacol Res
January 2025
Medical Research Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, Guangdong, 510080, China. Electronic address:
T-cell lymphomas (TCLs) are heterogeneous malignancies with limited treatment options and poor outcomes. The efficacy of traditional T-cell therapies, including chimeric antigen receptor (CAR) T cells, is often constrained by immunosuppressive factors and the tumor microenvironment. On the other hand, although direct Granzyme B (GrB) administration can effectively induce tumor cell apoptosis, it lacks universal tumor targeting and efficient cellular entry mechanisms.
View Article and Find Full Text PDFThe mechanism study of LncRNA AC012181.2 targeting HERPUD1 protein in regulating stromal stem cells participating in metabolic reprogramming for gastric cancer metastasis.
Int Immunopharmacol
January 2025
Department of Tumor Hematology, The Second Hospital of Jilin University, No.4026, Yatai Street, Nanguan District, Changchun 130000, China. Electronic address:
Objective: To investigate the role of long non-coding RNAs (lncRNAs) in the metabolic reprogramming of gastric cancer through their regulation of mesenchymal stem cells (MSCs) and HERPUD1 protein targets, aiming to elucidate mechanisms that could lead to novel therapeutic strategies.
Method: The RNA-seq was performed on BGC and hMSC-BGC cells to perform LncRNA screening. And we employed cell culture techniques using hMSC-BM and BGC823 cells, treated with various genetic interventions including siRNA and overexpression vectors.
Want 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!