کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7233656 | 1470977 | 2014 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Carbon nanotube-based label-free electrochemical biosensor for sensitive detection of miRNA-24
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The recent findings concerning the function of microRNAs (miRNAs) and the relationship between miRNA levels with specific disease highlight the need for miRNA detection. In this work, multi-walled carbon nanotubes (MWCNTs), having shown great potential for biosensors, were used to develop a simple, label-free, and sensitive electrochemical biosensor for detection of miRNA-24 by monitoring the oxidation signal of guanine. The synthetic DNA probes, being complementary with miRNA-24, were immobilized onto the surface of MWCNT-modified glass carbon electrodes by covalent cross-linking. The probes were hybridized with different concentrations of miRNA-24. The formed hybrids on the electrode surface were evaluated by differential pulse voltammetry. The change of guanine oxidation signal was observed as a result of the hybridization between the probes and miRNA-24. Control experiments using the non-complementary miRNA-29 were performed to evaluate the selectivity. Numerous factors affecting probe immobilization, target hybridization, and nonspecific binding events were optimized. Under the optimal conditions, the proposed miRNA-24 biosensor exhibits good sensitivity (4.963 μA cmâ2 decadeâ1), low detection limit (1 pM), and good selectivity and reproducibility. The biosensor also has acceptable recovery for miRNA-24 detection in complex miRNA sample.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biosensors and Bioelectronics - Volume 54, 15 April 2014, Pages 158-164
Journal: Biosensors and Bioelectronics - Volume 54, 15 April 2014, Pages 158-164
نویسندگان
Fengye Li, Jing Peng, Jingjing Wang, Hao Tang, Liang Tan, Qingji Xie, Shouzhuo Yao,