Fluorinated molecular beacons as functional DNA nanomolecules for cellular imaging

Area of Science:

• Biotechnology
• Nanotechnology
• Molecular Biology

Background:

• Molecular beacons (MBs) are versatile fluorescent nanoprobes for detecting biomolecules.
• Conventional MBs face challenges in complex biological settings, including instability and non-target interference.

Purpose of the Study:

• To design and synthesize novel fluorinated molecular beacons (FMBs) for improved cellular imaging.
• To enhance the stability and specificity of molecular beacons in biological environments.

Main Methods:

• Developed FMBs using artificial nucleotides with 3,5-bis(trifluoromethyl)benzene (F) as surrogate bases.
• Constructed the FMB stem via self-complementary F base pairing through hydrophobic interactions.
• Utilized fluorescence studies to assess FMB stability and performance in MCF-7 cells for mRNA detection.

Main Results:

• FMBs exhibited significantly improved stability compared to conventional MBs.
• The hydrophobic nature of F bases enhanced stem formation and overall probe integrity.
• An FMB successfully detected mRNA in MCF-7 cells, demonstrating its utility in cellular imaging.

Conclusions:

• Fluorinated molecular beacons (FMBs) represent a promising advancement in fluorescent nanoprobe technology.
• FMBs provide a stable and reliable platform for cellular imaging applications, particularly for mRNA detection.
• This approach overcomes key limitations of traditional molecular beacons in complex biological systems.