Sensitive detection of p53 tumor suppressor gene using an enzyme-based solid-state electrochemiluminescence sensing...

Area of Science:

• Biomedical Engineering
• Analytical Chemistry
• Molecular Diagnostics

Background:

• Early cancer detection relies on identifying specific genetic mutations.
• Point mutations in tumor suppressor genes like p53 are critical cancer biomarkers.
• Sensitive and specific detection methods are needed for clinical applications.

Purpose of the Study:

• To develop a novel enzyme-based solid-state electrochemiluminescence (ECL) sensing platform.
• To detect single point mutations in the p53 tumor suppressor gene with high sensitivity and specificity.
• To evaluate the platform's potential for cancer diagnosis and management.

Main Methods:

• Fabrication of a composite electrode using multiwalled carbon nanotubes and Ruthenium (II) tris-(bipyridine).
• Immobilization of single-stranded DNA (ssDNA) on the electrode surface via polypyrrole.
• Detection of gold nanoparticle (AuNP)-labeled p53 gene mutations and subsequent ECL signal generation using glucose-dehydrogenase (GDH).

Main Results:

• Successful development of an enzyme-based solid-state ECL sensing platform.
• Sensitive detection of single point mutations in the p53 gene.
• Discrimination between wild-type (wtp53) and mutated (mtp53) sequences with up to 56.3% accuracy.
• Demonstrated high sensitivity and specificity of the analytical results.

Conclusions:

• The developed ECL sensing platform offers a sensitive and specific method for detecting p53 gene mutations.
• This technology holds significant promise for the early diagnosis and effective management of cancer.
• The enzyme-based approach combined with ECL detection provides a robust platform for genetic mutation analysis.