Multiplexed nanoflares: mRNA detection in live cells.

Area of Science:

• Biotechnology
• Molecular Biology
• Nanotechnology

Background:

• Spherical nucleic acid (SNA) gold nanoparticle (Au NP) conjugates offer unique properties for molecular detection.
• Simultaneous detection of multiple intracellular targets remains a challenge in molecular biology.

Purpose of the Study:

• To develop a multiplexed nanoflare probe capable of simultaneously detecting two distinct mRNA targets within living cells.
• To enhance the precision of mRNA level determination and cell sorting through internal controls.

Main Methods:

• Conjugation of densely packed, highly oriented oligonucleotide sequences to gold nanoparticles.
• Hybridization of reporter molecules with distinct fluorophore labels to oligonucleotide sequences.
• Application of multiplexed nanoflares for sequence-specific signal generation in extra- and intracellular environments.

Main Results:

• Demonstrated simultaneous detection of two distinct mRNA targets using multiplexed nanoflares.
• Validated the use of one target as an internal control to normalize for variations in nanoparticle uptake and background.
• Achieved more precise relative mRNA level quantification in individual cells compared to single-component nanoflares.

Conclusions:

• Multiplexed nanoflares represent a significant advancement in intracellular mRNA detection.
• The developed probes offer improved accuracy for cell sorting and quantification of mRNA levels.
• This technology holds promise for various applications in molecular diagnostics and biological research.