Embryonic stem cell microenvironment suppresses the malignancy of cutaneous melanoma cells by down-regulating...

Area of Science:

• Oncology
• Stem Cell Biology
• Cancer Microenvironment Research

Background:

• Malignant tumors interact dynamically with their microenvironment (TME), promoting growth and therapeutic resistance.
• Early embryonic environments can reverse cancer cell malignancy by modulating the TME.
• Embryonic stem cell (ESC) microenvironments show potential for suppressing cancer cell behaviors.

Purpose of the Study:

• To investigate methods and mechanisms of ESC microenvironment in suppressing cutaneous melanoma cell malignancy.
• To evaluate the impact of ESC co-culture on melanoma cell behavior and underlying pathways.
• To determine if ESC microenvironment modulation can enhance anti-tumor effects.

Main Methods:

• Cutaneous melanoma cells (A2058) were co-cultured with ESCs under various conditions: continuous co-culture, daily refreshed co-culture, and co-culture with a PTEN inhibitor (VO-Ohpic).
• Cellular proliferation, migration, invasiveness, vasculogenic mimicry, and apoptosis were assessed.
• The PI3K/AKT signaling pathway was analyzed to understand the underlying molecular mechanisms.

Main Results:

• ESC co-culture significantly decreased A2058 cell proliferation, migration, invasiveness, and vasculogenic mimicry, while increasing apoptosis.
• These anti-tumor effects were associated with the down-regulation of the PI3K/AKT pathway.
• Enhanced ESC quality and quantity in co-culture amplified the observed anti-tumor effects, whereas PTEN inhibition weakened them.

Conclusions:

• ESC microenvironment effectively reduces cutaneous melanoma malignancy by down-regulating the PI3K/AKT pathway.
• Optimizing ESC co-culture conditions (quality and quantity) can enhance therapeutic efficacy.
• ESC microenvironment represents a promising and safe therapeutic strategy for cancer treatment.