Gold nanoparticles (AuNPs) are commonly used in biosensors of various kinds. The purification of DNA from cancer tissues is an important step in diagnostic and therapeutic development, but current methods are not optimal. Many cervical cancer patients are also susceptible to high-risk human papillomavirus (HR-HPV) infection. Accurate viral diagnosis has so far relied on the extraction of adequate amounts of DNA from formalin-fixed, paraffin-embedded (FFPE) tissue samples. Since the sensitivity and specificity of commercially available purification kits are not optimal, we designed a DNA purification method based on AuNPs to purify sufficient amounts of HR-HPV DNA from cervical cancer tissue samples. AuNPs were coated with a series of oligonucleotide probes to hybridize to specific DNA sequences of HR-HPV genotypes. With this method, we recovered 733 out of 800 copies of type-specific HPV DNA with complete specificity, compared to 36 copies with a standard commercial kit (Qiagen FFPE).
Keywords: Biosensor; Cervical cancer; Gold nanoparticle; Human papillomavirus; Oligonucleotide probe; Paraffin embedding
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Seyyedi, N.; Farjadian, F.; Farhadi, A.; Rafiei Dehbidi, G.; Ranjbaran, R.; Zare, F.; Okhovat, M. A.; Nikouyan, N.; Behzad-Behbahani, A. Beilstein Arch. 2019, 2019106. doi:10.3762/bxiv.2019.106.v1
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