Post-Surgery Healing Hydrogel Dressing with Anti-Metastatic Potential and Its Effects on Breast Cancer Cell...

Area of Science:

• Biomaterials Science
• Oncology
• Nanotechnology

Background:

• Metastatic breast cancer remains a critical challenge, necessitating novel therapeutic strategies.
• Chemotherapy drugs like doxorubicin and paclitaxel activate the unfolded protein response (UPR), regulated by glucose-regulated protein 78 (GRP78).
• Targeting UPR and GRP78 offers a potential avenue for anti-metastatic therapies.

Purpose of the Study:

• To develop a post-surgery hydrogel nanocomposite with anti-metastatic properties for breast cancer.
• To evaluate the hydrogel's impact on breast cancer metastasis and GRP78 localization.
• To investigate the underlying mechanisms of action, particularly UPR activation.

Main Methods:

• Chitosan nanoparticles (CsNPs) were synthesized and incorporated into a hydrogel matrix.
• Biocompatibility and hemocompatibility were assessed using MTT and hemolysis assays.
• Anticancer efficacy was evaluated through MTT assays, apoptosis analysis, ROS detection, mitochondrial potential, and caspase activity assays on MCF-7 cells.
• GRP78 expression and translocation were quantitatively analyzed.

Main Results:

• The developed hydrogel nanocomposite demonstrated excellent biocompatibility and hemocompatibility.
• Significant in vitro anticancer activity against MCF-7 breast cancer cells was observed.
• The hydrogel induced GRP78 translocation from the cytoplasm to the cell surface, enhancing its expression.
• This GRP78 modulation activated the UPR, contributing to anticancer and anti-metastatic effects.

Conclusions:

• The novel hydrogel nanocomposite exhibits potent anticancer and anti-metastatic properties.
• GRP78 translocation and UPR activation are key mechanisms underlying the hydrogel's efficacy.
• This hydrogel represents a promising multifunctional strategy for post-surgical breast cancer treatment.