Bone Marrow Mesenchymal Stem Cell-Derived Exosomes Modulate Chemoradiotherapy Response in Cervical Cancer Spheroids

Area of Science:

• Oncology
• Cell Biology
• Biotechnology

Background:

• Bone marrow mesenchymal stem cells (BM-MSCs) are implicated in chemo- and radiotherapy resistance, influencing cancer progression via the tumor microenvironment.
• BM-MSC-derived exosomes (BM-MSCs-exo), vesicles released by BM-MSCs, have shown potential tumor-suppressive effects.
• Understanding BM-MSCs-exo's role in modulating cancer treatment response is crucial for developing novel therapeutic strategies.

Purpose of the Study:

• To investigate the role of BM-MSCs-exo in modulating the effects of chemoradiotherapy (CRT) on different cervical cancer spheroid cells.
• To elucidate the molecular mechanisms underlying the observed effects of BM-MSCs-exo in combination with CRT.

Main Methods:

• Cervical cancer spheroid cells (HeLa and SiHa) were treated with CRT and BM-MSCs-exo.
• Assessed spheroid size, cell viability, and caspase activity.
• Utilized Western blot analysis to investigate molecular pathway activation, including the NF-κB pathway and HSP27 expression.

Main Results:

• BM-MSCs-exo reduced HeLa spheroid size and increased cell death, inducing apoptosis via NF-κB pathway activation.
• In SiHa spheroids, BM-MSCs-exo decreased cellular viability but also decreased caspase activity, correlating with increased HSP27 and reduced apoptosis.
• Differential molecular responses were observed between HeLa and SiHa cells, highlighting cell-type-specific effects of BM-MSCs-exo.

Conclusions:

• BM-MSCs-exo exhibit distinct modulatory effects on CRT response in different cervical cancer cell lines.
• The findings provide insights into the potential of BM-MSCs-exo as a therapeutic agent, suggesting the need for personalized treatment strategies.
• This study supports the development of more effective and safer therapeutic approaches for cervical cancer management.