A distinguished cancer-screening package containing a DNA sensor and an aptasensor for early and certain detection of...

A disposable package of biosensors was developed along with the corresponding guidelines for early detection of the acute lymphoblastic leukemia cancer. This proposed cancer-screening package included a DNA sensor and an aptasensor as two main types of biosensors. The biosensors were used simultaneously. This combination of sensors can detect not only the presence of mutant genes but also the biomarkers of cancer. At current work, the combination of sensors were used to detect the presence of BCR-ABL1 as a mutant gene and CEA as a biomarkers of cancer, such a capability makes the package liable for early and certain detection of acute lymphoblastic leukemia. To construct both the DNA sensor and the aptasensor, a nanocomposite consisting of electrosynthesis carbon quantum dots and biosynthesized gold nanoparticles was applied. The construction of these biosensors was characterized using four different electrochemical methods including DPV (Differential Pulse Voltammetry), EIS (Electrochemical Impedance Spectroscopy), CV (Cyclic Voltammetry) and chronoamperometry. The peak current of a catechol solution that was used as an electroactive probe on the biosensor was linearly related to the logarithm of the concentrations of the target DNA and the target antigen in the range of 10 pM to 100 μM and 1 pg mL^-1 to 0.001 g mL^-1 with the detection limits of 1.5 pM and 0.26 pg mL^-1 respectively, which are quite good results.