Immobilization of acrylamide-modified oligonucleotides by co-polymerization

Area of Science:

• Biochemistry
• Materials Science
• Molecular Biology

Background:

• Solid-phase synthesis and attachment of biomolecules are crucial for various applications.
• Existing methods for oligonucleotide attachment can be limited in stability and flexibility.
• Developing robust methods for immobilizing DNA probes is essential for biosensor development.

Purpose of the Study:

• To describe a novel and flexible chemistry for the solid-phase attachment of oligonucleotides.
• To create thermally stable DNA-containing polyacrylamide co-polymers.
• To enable the fabrication of stable probe-containing layers on diverse supports.

Main Methods:

• Oligonucleotides were modified with 5'-terminal acrylamide groups.
• These modified oligonucleotides were co-polymerized with acrylamide monomers.
• Attachment was achieved on supports with exposed acrylic groups, such as plastic microtiter plates and silanized glass.

Main Results:

• Efficient co-polymerization resulted in thermally stable DNA-containing polyacrylamide co-polymers.
• The attachment chemistry was specific to the terminal acrylamide group.
• High surface density of hybridizable oligonucleotide (approximately 200 fmol/mm2) was achieved on fabricated supports.

Conclusions:

• A flexible and efficient method for solid-phase oligonucleotide attachment has been established.
• This co-polymerization technique yields stable, DNA-functionalized surfaces suitable for various applications.
• The method allows for high-density probe immobilization on readily available materials.