title: Understanding the Biomedical Effects of the Self-Assembled Tetrahedral DNA Nanostructure on Living Cells.
abstract: Recently, much attention has been paid to DNA again due to the successful synthesis of DNA-based nanostructures that can enter cells via endocytosis and thus have great potential in biomedical fields. However, the impacts of DNA nanostructures on life activities of a living cell are unknown. Herein, the promotion effect of tetrahedral DNA nanostructure (TDN) on cell growth and the underlying molecular mechanisms are reported. Upon exposure to TDN, cell proliferation is significantly enhanced, accompanied by up-regulation of cyclin-dependent kinase like-1 gene, changes in cell cycle distribution, and up-regulation of the Wnt/β-catenin signaling-related proteins (β-catenin, Lef 1 and cyclin D). In contrast, single-stranded DNA (ssDNA) shows no such functions. Furthermore, TDN is able to reverse the inhibition effect of DKK1, a specific inhibitor for Wnt/β-catenin pathway. Hence, the Wnt/β-catenin pathway is the target for TDN to promote cell proliferation. The findings allow TDN to be a novel functional nanomaterial that has great potential in tissue repair and regeneration medicine.
authors.affiliation: State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University , Chengdu 610041, China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Peng
authors.affiliation: State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University , Chengdu 610041, China.
authors.forename: Xiao-Ru
authors.initials: XR
authors.lastname: Shao
authors.affiliation: State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University , Chengdu 610041, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Xie
authors.affiliation: State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University , Chengdu 610041, China.
authors.forename: Si-Rong
authors.initials: SR
authors.lastname: Shi
authors.affiliation: State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University , Chengdu 610041, China.
authors.forename: Xue-Qin
authors.initials: XQ
authors.lastname: Wei
authors.affiliation: State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University , Chengdu 610041, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University , Chengdu 610041, China.
authors.forename: Xiao-Xiao
authors.initials: XX
authors.lastname: Cai
authors.affiliation: State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University , Chengdu 610041, China.
authors.forename: Yun-Feng
authors.initials: YF
authors.lastname: Lin
mesh_terms: D000818:Animals; D016203:CDC2 Protein Kinase / Q000235:genetics; D002453:Cell Cycle / Q000187:drug effects; D002460:Cell Line; D049109:Cell Proliferation / Q000187:drug effects; D004247:DNA / Q000737:chemistry* / Q000494:pharmacology*; D004277:DNA, Single-Stranded / Q000494:pharmacology; D005786:Gene Expression Regulation / Q000187:drug effects; D051379:Mice; D049329:Nanostructures / Q000737:chemistry*; D013329:Structure-Activity Relationship; D060449:Wnt Signaling Pathway / Q000235:genetics
chemical_list: D004277:DNA, Single-Stranded; D004247:DNA; D016203:CDC2 Protein Kinase
keywords: Western blot; cell cycle; flow cytometry; microarray; nanomaterials; self-assembly