Chromosome conformation capture-based DNA hybridization method for chromosomal translocation screening

Area of Science:

• Molecular Biology
• Genetics
• Nanotechnology

Background:

• DNA probes are established diagnostic tools for chromosomal translocations.
• Developing efficient screening methods for genetic rearrangements is crucial for cancer diagnosis.

Purpose of the Study:

• To design a screening tool utilizing single-stranded DNA (ssDNA) probes and chromosome conformation capture (3C) library fragment hybridization.
• To develop a specific probe for the juxtaposed region of the MYC and TRD genes.

Main Methods:

• Functionalization of MYC gene fragments with thiol modification using gold nanoparticles (Au NPs) to create MYC-Au NP probes.
• Immobilization of TRD probes onto a nitrocellulose surface.
• Hybridization assay between DNA probes and 3C library fragments from SKW3 cells, with detection via color intensity.

Main Results:

• Optimal hybridization was observed between the 3C library sample of SKW3 cells and the designed probes, indicated by higher color intensity.
• The assay demonstrated differential signal intensity compared to human umbilical vein endothelial cells.

Conclusions:

• The combination of 3C-based techniques and DNA-DNA hybridization offers a viable method for identifying genetic rearrangements in cancer cells.
• This approach shows promise as a diagnostic tool for detecting specific translocations like MYC-TRD.