alexa Development of Gold Nanoparticle Based Colorimetric Biosensor for Detection of Fibronectin in Lung Cancer Cell Line | OMICS International | Abstract
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Research Article

Development of Gold Nanoparticle Based Colorimetric Biosensor for Detection of Fibronectin in Lung Cancer Cell Line

Abstract

Specific protein detection by means of antibody-nanoparticle conjugates is a new field in medical nanobiotechnology. Among many nanoparticles used, gold nanoparticles show strong light-absorption properties which have been exploited in designing nanobiosensors. Fibronectin (FN) plays an important role in extracellular matrix (ECM) structure and function of normal cells; however, in conditions like lung carcinoma its expression increases, especially in non-small cell lung carcinoma (NSCLC). In this study, we conjugated gold nanoparticles to human fibronectin antibody (anti-hFN) to design a colorimetric nanobiosensor for detection of FN present in ECM of cultured cells. Three different cell lines namely A549 (target cells), AGO-1522 (control cells) and Nalm-6 (negative control cells) were used to compare changes in color resulting from aggregation of gold nanoparticles due to higher amount of FN. Our construct was able to detect increased level of FN which was distinguishable visually by change in color and could be confirmed by spectrophotometer as well.

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