Magnetic-Composite-Modified Polycrystalline Silicon Nanowire Field-Effect Transistor for Vascular Endothelial Growth Factor Detection and Cancer Diagnosis

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• 作者：Hsiao-Chien Chen ; Jian-Tai Qiu ; Fu-Liang Yang ; Yin-Chih Liu ; Min-Cheng Chen ; Rung-Ywan Tsai ; Hung-Wei Yang ; Chia-Yi Lin ; Chu-Chi Lin ; Tzong-Shoon Wu ; Yi-Ming Tu ; Min-Cong Xiao ; Chia-Hua Ho ; Chien-Chao Huang ; Chao-Sung Lai ; Mu-Yi Hua
• 刊名：Analytical Chemistry
• 出版年：2014
• 出版时间：October 7, 2014
• 年：2014
• 卷：86
• 期：19
• 页码：9443-9450
• 全文大小：517K
• ISSN：1520-6882

文摘

This study proposes a vascular endothelial growth factor (VEGF) biosensor for diagnosing various stages of cervical carcinoma. In addition, VEGF concentrations at various stages of cancer therapy are determined and compared to data obtained by computed tomography (CT) and cancer antigen 125 (CA-125). The increase in VEGF concentrations during operations offers useful insight into dosage timing during cancer therapy. This biosensor uses Avastin as the biorecognition element for the potential cancer biomarker VEGF and is based on a n-type polycrystalline silicon nanowire field-effect transistor (poly-SiNW-FET). Magnetic nanoparticles with poly[aniline-co-N-(1-one-butyric acid) aniline]鈥揊e₃O₄ (SPAnH鈥揊e₃O₄) shell鈥揷ore structures are used as carriers for Avastin loading and provide rapid purification due to their magnetic properties, which prevent the loss of bioactivity; furthermore, the high surface area of these structures increases the quantity of Avastin immobilized. Average concentrations in human blood for species that interfere with detection specificity are also evaluated. The detection range of the biosensor for serum samples covers the results expected from both healthy individuals and cancer patients.