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Related Experiment Video

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Preparation and Testing of Impedance-based Fluidic Biochips with RTgill-W1 Cells for Rapid Evaluation of Drinking Water Samples for Toxicity

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Electrical impedimetric biosensors for liver function detection.

Ya-Hsuan Chuang¹, Yun-Tzu Chang, Kuo-Liang Liu

¹National Tsing Hua University, Department of Materials Science and Engineering, 101, Sec. 2, Kuang-Fu Road, Hsinchu 30013, Taiwan.

Biosensors & Bioelectronics

|August 16, 2011

Summary

This study developed an electrical impedimetric biosensor for detecting human serum albumin (HSA), a key liver function biomarker. The novel biosensor offers a low-cost, easily integrated method for quantitative HSA detection and liver function assessment.

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Human Liver Microphysiological System for Assessing Drug-Induced Liver Toxicity In Vitro

Human Liver Microphysiological System for Assessing Drug-Induced Liver Toxicity In Vitro

Published on: January 31, 2022

Area of Science:

Biomedical Engineering
Biosensor Technology
Electrochemical Analysis

Background:

Human serum albumin (HSA) is a critical biomarker for assessing liver function.
Accurate and sensitive detection of HSA is essential for early diagnosis and monitoring of liver diseases.
Existing methods for HSA detection can be complex or costly, necessitating simpler alternatives.

Purpose of the Study:

To fabricate and characterize an electrical impedimetric biosensor for the quantitative detection of human serum albumin (HSA).
To evaluate the biosensor's potential for assessing liver function.
To demonstrate the feasibility of electrochemical impedance spectroscopy for HSA quantification.

Main Methods:

Fabrication of gold (Au) electrodes using a single-step photolithography process.
Surface modification with 3-aminopropyltriethoxysilane (APTES) and blocking with skim milk powder to enhance biocompatibility and prevent non-specific binding.
Quantitative measurement of HSA concentration using electrochemical impedance spectroscopy (EIS) under AC conditions.

Main Results:

The biosensor demonstrated a linear relationship between impedance and HSA concentration on a log-log scale.
The developed impedimetric biosensor achieved a limit of detection for HSA of approximately 2 x 10(-4) mg/ml.
Successful quantification of HSA, indicating the sensor's efficacy for biomarker detection.

Conclusions:

Electrochemical impedimetric biosensors offer a feasible and sensitive platform for quantifying HSA.
The proposed biosensor is suitable for liver function assessment due to its simple mechanism, biochip integration capability, and low cost.
This technology holds promise for future point-of-care diagnostic applications in liver health monitoring.