Murine melanoma cells incomplete reprogramming using non-viral vector

Area of Science:

• * Cancer Biology
• * Stem Cell Research
• * Epigenetics

Background:

• * Cancer cell reprogramming offers a platform to study cancer genes and cell environment interactions.
• * Investigating the reprogramming capacity of murine melanoma B16F10 cells is crucial for understanding melanoma progression and developing new therapies.

Purpose of the Study:

• * To investigate the reprogramming capacity of murine melanoma B16F10 cells.
• * To determine if non-viral DNA can induce reprogramming in B16F10 cells.
• * To characterize the resulting reprogrammed cells and assess their properties.

Main Methods:

• * Transfection of B16F10 cells with non-viral circular DNA plasmid encoding Oct4, Sox2, Nanog, Lin28 (OSLN), and green fluorescent protein (GFP).
• * Characterization of reprogrammed cells using immunofluorescence, RT-PCR, and cell cycle analysis.
• * Assessment of tumorogenicity and teratoma formation in vivo.

Main Results:

• * Successful reprogramming of B16F10 cells into epithelioid cells expressing pluripotent stem cell markers was achieved using non-viral minicircle DNA (OSLN + GFP).
• * Reprogrammed cells exhibited cancer stem cell characteristics, including asymmetric and symmetric division, but did not form teratomas.
• * Reprogrammed cells showed suppressed tumorogenicity (reduced tumor size) and cell cycle arrest in the G1 phase, unlike parental cells in S phase.
• * Long-term cultivation led to the regression of reprogramming in B16F10 cells.

Conclusions:

• * Reprogramming of B16F10 cells can yield less aggressive murine melanoma reprogrammed cancer cells.
• * These reprogrammed cells serve as a valuable model for studying cancer cell malignancy mechanisms.
• * The reprogrammed cells provide a novel tool for anti-cancer drug screening and development.