Simple method for preparation of fluor/hapten-labeled dUTP

Area of Science:

• Molecular Biology
• Genetics
• Biochemistry

Background:

• Multiplex-fluorescence in situ hybridization (M-FISH) and other DNA probe-based techniques require substantial quantities of labeled nucleotides.
• The high cost of commercially available fluor- or hapten-labeled nucleotides presents a significant barrier for many research laboratories.

Purpose of the Study:

• To develop a cost-effective method for synthesizing fluor- or hapten-labeled nucleotides.
• To enable researchers to produce their own labeled nucleotides for DNA probe preparation, thereby reducing experimental costs.

Main Methods:

• Synthesizing labeled nucleotides by coupling fluor or hapten succinimidyl esters with 5-(3-aminoallyl)-2'-deoxyuridine 5' triphosphate (AA-dUTP).
• Performing simple coupling and purification procedures in-house.
• Utilizing nick translation or PCR amplification for DNA probe preparation with the synthesized nucleotides.

Main Results:

• Achieved a cost reduction of approximately 99% for labeled nucleotides compared to commercial sources.
• Successfully prepared four to ten different fluor/hapten dUTP batches (2.5 microM scale) within a 24-hour period.
• Reagent costs ranged from $33-$237 per microM, depending on the specific fluor/hapten used.

Conclusions:

• The described method provides a practical and economical solution for obtaining labeled nucleotides.
• This approach significantly lowers the financial burden associated with DNA probe synthesis for techniques like M-FISH and FISH.
• Empowers researchers to conduct advanced molecular biology experiments more affordably.