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

作者：Chen Hsiao Chien; Qiu Jian Tai; Yang Fu Liang; Liu Yin Chih; Chen Min Cheng; Tsai Rung Ywan; Yang Hung Wei; Lin Chia Yi; Lin Chu Chi; Wu Tzong Shoon; Tu Yi Ming; Xiao Min Cong; Ho Chia Hua; Huang Chien Chao; Lai Chao Sung^*; Hua Mu Yi

来源：Analytical Chemistry, 2014, 86(19): 9443-9450.

DOI：10.1021/ac5001898

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]-Fe3O4 (SPAnH-Fe3O4) shell-core 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.

• 出版日期2014-10-7
• 单位长春大学