High-density lipoprotein sensor based on molecularly imprinted polymer.

Area of Science:

• Biomaterials Science
• Analytical Chemistry
• Cardiovascular Diagnostics

Background:

• Low high-density lipoprotein (HDL) levels are key indicators for metabolic syndrome, atherosclerosis, and coronary heart disease.
• Accurate and rapid detection of HDL is crucial for clinical diagnosis and management.
• Existing diagnostic methods can be time-consuming and require sample preparation.

Purpose of the Study:

• To synthesize and characterize a molecularly imprinted polymer (MIP) for selective high-density lipoprotein (HDL) binding.
• To develop an artificial, biomimetic sensor layer for HDL detection.
• To evaluate the sensor's performance in terms of detection range, selectivity, accuracy, and speed.

Main Methods:

• Synthesis of a molecularly imprinted polymer (HDL-MIP) using methacrylic acid, N-vinylpyrrolidone, and ethylene glycol dimethacrylate.
• Utilizing a 10 MHz dual electrode quartz crystal microbalance (QCM) for sensor measurements.
• Testing the sensor's response to HDL standards and potential interfering substances (LDL, VLDL, HSA) in phosphate-buffered saline (PBS).

Main Results:

• The HDL-MIP sensor demonstrated a dynamic detection range of 2-250 mg/dL HDL cholesterol (HDL-C).
• The sensor exhibited high selectivity, with minimal interference from low-density lipoprotein (LDL), very-low-density lipoprotein (VLDL), and human serum albumin (HSA).
• The sensor achieved rapid results (10 minutes) with high recovery rates (94-104%) and precision (2.3-7.7%), correlating well (R²=0.97) with standard enzymatic assays.

Conclusions:

• A novel HDL-MIP sensor has been successfully developed for the selective and rapid detection of HDL.
• This biomimetic sensor offers a promising alternative to conventional methods for HDL-C measurement in clinical settings.
• The sensor's speed, accuracy, and selectivity facilitate efficient diagnosis of conditions linked to low HDL levels.