Template and catalytic effects of DNA in the construction of polypyrrole/DNA composite macro and microelectrodes

Electrochemical Detection of dsDNA-Specific Antibodies

Electrochemical biosensors have shown great promise as useful point-of-care tests since they operate on electronic circuits which can be miniaturized and whose readout process can be easily automated. Here, we describe a method for the electrochemical sensing of antibodies directed against double-stranded DNA (α-dsDNA), which are often present at higher-than-normal levels in the sera of autoimmune disease patients. The method can be easily implemented in any lab and requires little investment in equipment, namely a potentiostat. An artificial reference serum sample containing known amounts of spiked-in α-dsDNA antibodies enables reporting results in absolute scale rather than titer. Once electrodes are modified with DNA and the calibration curves are made (i.e., after the biosensor construction phase), individual measurements in test samples can be obtained in as low as 35 min.

An electrochemical biosensor for rapid detection of anti-dsDNA antibodies in absolute scale

The authors report an electrochemical biosensor enabling fast (30 min) detection of anti-DNA antibodies in serum with reduced manipulation steps.