Progress in nanoparticle-based electrochemical biosensors for hormone detection

Area of Science:

• Biomedical Engineering
• Analytical Chemistry
• Nanotechnology

Background:

• Hormones are vital chemical messengers regulating numerous physiological processes.
• Hormone concentrations are extremely low (1 nM or less), necessitating highly sensitive detection methods.
• Nanoparticle-based electrochemical biosensors offer promising solutions for sensitive hormone detection.

Purpose of the Study:

• To critically compare various nanoparticle-based electrochemical biosensors for detecting key hormones.
• To analyze sensor performance based on biological fluid, electrochemical transducer, and nanoparticle modifications.
• To review recent advancements in wearable biosensors and point-of-care testing for hormone analysis.

Main Methods:

• Literature review and critical comparison of existing nanoparticle-based electrochemical biosensors.
• Categorization of biosensors by biological fluid tested and electrochemical transducer (voltammetric/impedimetric).
• Analysis of electrode modification strategies utilizing nanoparticles to enhance sensitivity, specificity, and stability.

Main Results:

• Comparison of detection limits (LOD), linear ranges, reproducibility, and reusability of different biosensors.
• Identification of specific nanoparticles and electrode modifications that improve biosensor performance for hormones like cortisol, sex hormones, insulin, TSH, and GH.
• Overview of trends in wearable and point-of-care testing devices for hormone detection.

Conclusions:

• Nanoparticle-based electrochemical biosensors show significant potential for sensitive and specific hormone detection.
• Advancements in nanomaterials and microfluidics are driving the development of improved diagnostic tools.
• Wearable biosensors and point-of-care testing represent the future of clinical diagnostics in endocrinology.