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Flow Cytometry

Flow Cytometry

The development of flow cytometry techniques began in 1934 with initial attempts by Andrew Moldavan, a bacteriologist who counted the cells in a flowing capillary system. Moldavan pumped cells through a capillary tube focused under a microscope for visualization. The invention of photometry allowed the measurement of differentially-stained cells, and Louis Kamentsky developed the first multiparameter flow cytometer in 1965 to identify and count the cancer cells in cervical tissue specimens.
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DNA Detection by Flow Cytometry using PNA-Modified Metal-Organic Framework Particles.

Raquel Mejia-Ariza¹, Jessica Rosselli^1,2, Christian Breukers³

¹Molecular NanoFabrication group, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500, AE Enschede, The Netherlands.

Chemistry (Weinheim an Der Bergstrasse, Germany)

|February 1, 2017

Summary

This study presents a novel DNA detection platform using functionalized metal-organic framework (MOF) particles and flow cytometry. The platform accurately distinguishes DNA targets, including those with single-base mismatches.

Keywords:

metal-organic frameworks multivalent biomaterials nanoparticles nucleic acid recognition peptide nucleic acids

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Area of Science:

Materials Science
Nanotechnology
Biotechnology

Background:

Metal-organic frameworks (MOFs) offer versatile platforms for sensing applications due to their tunable properties.
Surface functionalization of MOFs is crucial for targeted molecular interactions and detection.
Flow cytometry enables high-throughput analysis of individual particles for quantitative biological assays.

Purpose of the Study:

To develop a DNA-sensing platform utilizing functionalized metal-organic framework (MOF) particles.
To investigate the efficacy of covalent and non-covalent functionalization strategies for DNA binding.
To demonstrate the capability of the platform for sensitive and selective DNA discrimination using flow cytometry.

Main Methods:

Surface modification of MIL-88A MOF particles via covalent (alkyne) and non-covalent (biotin) strategies.
DNA probe immobilization using click chemistry (alkyne-MOF) and streptavidin-biotin interactions (biotin-MOF).
Characterization and detection using confocal imaging and high-throughput flow cytometry.

Main Results:

Successful functionalization of MIL-88A MOF particles with alkyne and biotin groups.
Selective binding of DNA targets to the functionalized MOF surfaces was confirmed.
Flow cytometry quantitatively demonstrated the platform's ability to differentiate between complementary, mismatched, and random DNA sequences.

Conclusions:

The developed MOF-based platform enables efficient and selective DNA detection.
Surface functionalization strategies are key to tailoring MOF particles for specific molecular recognition.
This platform shows promise for sensitive DNA analysis in various applications.