2-Aminopurine hairpin probes for the detection of ultraviolet-induced DNA damage

Area of Science:

• Biochemistry
• Molecular Biology
• Biophysics

Background:

• Nucleic acid damage from radiation and chemicals is linked to disease.
• Current DNA damage detection methods are often slow, destructive, or lack generality.
• Understanding DNA damage is crucial for disease mechanism research.

Purpose of the Study:

• To develop a novel fluorescence sensor for quantifying ultraviolet (UV) C-induced nucleic acid damage.
• To assess the sensitivity and specificity of the developed sensor.
• To provide a simple, fast, and economic alternative for DNA damage detection.

Main Methods:

• Incorporation of 2-aminopurine (2AP), a fluorescent adenine analogue, into a hairpin probe.
• Utilizing the fluorescence properties of 2AP to detect UV-induced nucleic acid damage.
• Quantification of DNA damage using a calibration curve and determining the limit of detection.

Main Results:

• The 2AP hairpin probe demonstrated selectivity comparable to molecular beacon (MB) probes for UV-induced DNA damage.
• A linear calibration curve (R(2)=0.98) was established for the 2AP hairpin probe.
• A limit of detection of 17.2 nM was achieved, indicating high sensitivity.

Conclusions:

• The developed 2AP hairpin probe is an effective fluorescence sensor for quantifying UV-induced DNA damage.
• This method offers a simple, rapid, and cost-effective approach for assessing nucleic acid damage.
• The sensor has potential applications in disease research and diagnostics.