Comparative changes in breast cancer cell proliferation and signalling following somatostatin and cannabidiol...

Area of Science:

• Oncology
• Molecular Biology
• Pharmacology

Background:

• Breast cancer is a leading cause of death in women globally.
• Somatostatin (SST) and cannabinoids exhibit anti-proliferative and pro-apoptotic properties.
• The precise mechanisms underlying SST and cannabinoid actions in breast cancer are not fully understood.

Purpose of the Study:

• To investigate the effects of SST and Cannabidiol (CBD) on breast cancer cells.
• To analyze changes in receptor expression, cell proliferation, and apoptosis.
• To explore downstream signaling pathways influenced by SST and CBD treatments.

Main Methods:

• Treatment of MDA-MB-231 and MCF-7 breast cancer cells with SST and CBD, alone or in combination.
• Evaluation of cell membrane receptor expression.
• Assessment of cell proliferation and apoptosis rates.
• Analysis of downstream signaling pathways, including PI3K/AKT.

Main Results:

• SST and CBD treatments inhibited cell proliferation and increased apoptosis in both cell lines.
• Receptor expression at the cell membrane showed cell type and agonist-dependent changes.
• MCF-7 cells treated with SST and CBD showed reduced phosphorylated Protein Kinase B (pAKT) and phosphorylated-Phosphoinositide 3-Kinase (pPI3K).
• Inhibition of PI3K/AKT pathway was associated with increased PTEN expression in MCF-7 cells.

Conclusions:

• SST and CBD modulate breast cancer cell behavior, including proliferation and apoptosis.
• The interaction between Somatostatin Receptor (SSTR) and Cannabinoid Receptor (CBR) subtypes influences signaling pathways.
• These effects are dependent on the specific breast cancer cell type, suggesting targeted therapeutic potential.