A highly specific graphene platform for sensing collagen triple helix. Issue 6 (11th January 2016)

• Record Type: Journal Article
• Authors: Sun, Xiuxia; Fan, Jun; Ye, Weiran; Zhang, Han; Cong, Yong; Xiao, Jianxi
• Is Part Of: Journal of materials chemistry. Volume 4:Issue 6(2016)
• Page Start: 1064
• Page End: 1069
• Publication Date: 2016-01-11
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Biomedical materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c5tb02218e
• Languages: English
• ISSNs: 2050-750X

Abstract

Abstract : We have designed a dye-labeled, highly positively charged single stranded collagen (ssCOL) peptide probe whose adsorption into GO quenches its fluorescence. The hybridization of the ssCOL probe with a complementary target sequence forms a triple stranded collagen (tsCOL) peptide, resulting in the retention of the fluorescence of the probe. Abstract : The construction of simple and efficient assays to detect collagen biomarkers plays a critical role in developing novel diagnosis and therapies for the highly prevalent chronic fibroproliferative diseases. Inspired by the successful development of various GO-based biosensors for DNA utilizing its well-known double helix structure, we have for the first time created a highly specific GO platform for sensing the collagen triple helix. We have designed a dye-labeled single stranded collagen (ssCOL) peptide probe to target a complementary single stranded collagen peptide sequence. We have revealed that GO binds with the ssCOL probe and quenches the fluorescence of the dye, while the hybridization of the ssCOL probe with its target collagen peptide GPO results in the retention of the fluorescence of the probe. We have demonstrated that this design provides a fluorescence-enhanced assay that is sensitive and selective to the target collagen peptide with little interferences from other proteins, and it can be applied for quantitative detection in complex biological fluids. These results indicate that this GO-based ssCOL platform has great potential in molecular diagnostics of fibroproliferative diseases. It may provide a novel strategy to construct efficient assays for the proteins containing triple helix motifs such as collectins, adiponectin, macrophage scavenger and C1q.