PMID- 28118564 OWN - NLM STAT- MEDLINE DCOM- 20170606 LR - 20190729 IS - 1944-7922 (Electronic) IS - 1060-3271 (Linking) VI - 100 IP - 2 DP - 2017 Mar 1 TI - A Label-Free Electrochemical Biosensor Based on a Reduced Graphene Oxide and Indole-5-Carboxylic Acid Nanocomposite for the Detection of Klebsiella pneumoniae. PG - 548-552 LID - 10.5740/jaoacint.16-0251 [doi] AB - A label-free DNA hybridization electrochemical sensor for the detection of Klebsiella pneumoniae was developed, which could be helpful in the diagnosis of bacterial infections. Indole-5-carboxylic acid (ICA) and graphene oxide (GO) were electrodeposited on a glassy carbon electrode, and the resulting reduced GO (rGO)-ICA hybrid film served as a platform for immobilizing oligonucleotides on a single-stranded DNA (ssDNA) sequence. The conditions were optimized, with excellent electrochemical performance. A significant change was observed after hybridization of ssDNA with the target probe under optimum conditions. Hybridization with complementary, noncomplementary, one-base mismatched, and three-base mismatched DNA targets was studied effectively by differential pulse voltammetry. The proposed strategy could detect target DNA down to 3 x 10-11 M, with a linear range from 1 x 10-6 M to 1 x 10-10 M, showing high sensitivity. This electrochemical method is simple, free from indicator, and shows good selectivity. Hence, electrochemical biosensors are successfully demonstrated for the detection of K. pneumoniae. FAU - Zhang, Ze AU - Zhang Z AD - Fudan University Pudong Medical Center, Shanghai Pudong Hospital, Department of Clinical Laboratory, 2800 Gongwei Rd, Huinan Town, Pudong, Shanghai 201399, China. FAU - Yu, Hong-Wei AU - Yu HW AD - The First Affiliated Hospital of the Harbin Medical University, No. 23 Youzheng St, Harbin, Heilongjiang Province 150001, China. FAU - Wan, Guang-Cai AU - Wan GC AD - The First Affiliated Hospital of the Harbin Medical University, No. 23 Youzheng St, Harbin, Heilongjiang Province 150001, China. FAU - Jiang, Jing-Hui AU - Jiang JH AD - The First Affiliated Hospital of the Harbin Medical University, No. 23 Youzheng St, Harbin, Heilongjiang Province 150001, China. FAU - Wang, Na AU - Wang N AD - The First Affiliated Hospital of the Harbin Medical University, No. 23 Youzheng St, Harbin, Heilongjiang Province 150001, China. FAU - Liu, Zhi-Yong AU - Liu ZY AD - The First Hospital of Suihua City, Intersection of Renhe St and Changjiang North Rd, Suihua, Heilongjiang Province 152000, China. FAU - Chang, Dong AU - Chang D AD - Fudan University Pudong Medical Center, Shanghai Pudong Hospital, Department of Clinical Laboratory, 2800 Gongwei Rd, Huinan Town, Pudong, Shanghai 201399, China. FAU - Pan, Hong-Zhi AU - Pan HZ AD - Harbin Medical University, Public Health School, No. 157 Baojian Rd, Nangang District, Harbin, Heilongjiang Province 150081, China. LA - eng PT - Journal Article DEP - 20161130 PL - England TA - J AOAC Int JT - Journal of AOAC International JID - 9215446 RN - 0 (DNA Probes) RN - 0 (DNA, Single-Stranded) RN - 0 (Indoles) RN - 0 (indole-5-carboxylic acid) RN - 7782-42-5 (Graphite) SB - IM MH - Biosensing Techniques/*methods MH - DNA Probes/chemistry MH - DNA, Single-Stranded/chemistry MH - Electrochemical Techniques/*methods MH - Graphite/*chemistry MH - Indoles/*chemistry MH - Klebsiella pneumoniae/genetics/*isolation & purification MH - Nanocomposites/*chemistry MH - Nucleic Acid Hybridization EDAT- 2017/01/25 06:00 MHDA- 2017/06/07 06:00 CRDT- 2017/01/25 06:00 PHST- 2017/01/25 06:00 [pubmed] PHST- 2017/06/07 06:00 [medline] PHST- 2017/01/25 06:00 [entrez] AID - 10.5740/jaoacint.16-0251 [doi] PST - ppublish SO - J AOAC Int. 2017 Mar 1;100(2):548-552. doi: 10.5740/jaoacint.16-0251. Epub 2016 Nov 30.