Table 1 Comparison of some recently reported biosensor for detection of MMP-7

DNA enzyme-decorated DNA nanoladders

Differential pulse voltammetry

0.05 pg mL⁻¹

2 × 10^− 4–20 ng mL⁻¹

Kou et al. 2016 [14]

Au/Ag@SiO₂

Fluorescence resonance energy transfer

0.22 pg mL⁻¹

1 × 10^− 2–100 ng mL⁻¹

Lei et al. 2017 [10]

Gold nanoparticles

Colorimetry

0.1 μg mL⁻¹

0–2 μg mL⁻¹

Chen et al. 2013 [8]

Magnetic peptide−DNA probe

Square wave voltammetry

0.02 pg mL⁻¹

1 × 10^− 4–50 ng mL⁻¹

Wang et al. 2017 [28]

BSA-Pd-SAM-PDA probe

Square wave voltammetry

3.1 fg mL⁻¹

1 × 10^− 5–10 ng mL⁻¹

Zheng et al. 2018 [11]

Pd-CNCs enhancer

Square wave voltammetry

17.38 fg mL⁻¹

1 × 10^− 4–100 ng mL⁻¹

This work