Journal: Theranostics
Article Title: Superior Performance of Aptamer in Tumor Penetration over Antibody: Implication of Aptamer-Based Theranostics in Solid Tumors
doi: 10.7150/thno.11711
Figure Lengend Snippet: Time-dependent penetration of PEGylated aptamer and antibody in relation to blood vessels in HT29 xenograft tumors. (a) Representative images of double staining of aptamer or antibody and blood vessels in tumor sections dissected from treated mice-bearing HT29 xenografts 3 h and 24 h after i.v. administration of aptamer or antibody at a dose of 2 nmol/mouse. Blood vessels were stained by chromogenic alkaline phosphatase (black arrow); while aptamer or antibody were stained using DAB peroxidase substrate (brown). Scale bar: 200 μm. (b-c) Quantitative determination of staining intensity against a given perpendicular distance (20-200 μm) to the blood vessels at 3 h. (b) and 24 h (c) after i.v. injection of aptamer or antibody. Data are means ± SEM (n=8).
Article Snippet: The chromogenic alkaline phosphatase solution (Vector Labs, Cat #SK-5100) was prepared according to the manufacturer's instruction and added to the slides following 1 h staining of secondary anti-biotin antibody (Vector Labs, Cat #SP-3020) (1: 250 dilution).
Techniques: Double Staining, Staining, Injection