title: In vivo analytical performance of nitric oxide-releasing glucose biosensors.
abstract: The in vivo analytical performance of percutaneously implanted nitric oxide (NO)-releasing amperometric glucose biosensors was evaluated in swine for 10 d. Needle-type glucose biosensors were functionalized with NO-releasing polyurethane coatings designed to release similar total amounts of NO (3.1 μmol cm(-2)) for rapid (16.0 ± 4.4 h) or slower (>74.6 ± 16.6 h) durations and remain functional as outer glucose sensor membranes. Relative to controls, NO-releasing sensors were characterized with improved numerical accuracy on days 1 and 3. Furthermore, the clinical accuracy and sensitivity of rapid NO-releasing sensors were superior to control and slower NO-releasing sensors at both 1 and 3 d implantation. In contrast, the slower, extended, NO-releasing sensors were characterized by shorter sensor lag times (<4.2 min) in response to intravenous glucose tolerance tests versus burst NO-releasing and control sensors (>5.8 min) at 3, 7, and 10 d. Collectively, these results highlight the potential for NO release to enhance the analytical utility of in vivo glucose biosensors. Initial results also suggest that this analytical performance benefit is dependent on the NO-release duration.
authors.affiliation: Department of Chemistry, University of North Carolina at Chapel Hill , CB 3290, Chapel Hill, North Carolina 27599, United States.
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Soto
authors.forename: Benjamin J
authors.initials: BJ
authors.lastname: Privett
authors.forename: Mark H
authors.initials: MH
authors.lastname: Schoenfisch
mesh_terms: D000818:Animals; D015374:Biosensing Techniques / Q000295:instrumentation / Q000379:methods*; D001786:Blood Glucose / Q000032:analysis; D005947:Glucose / Q000032:analysis*; D053758:Nanoparticles / Q000737:chemistry; D009569:Nitric Oxide; D020030:Nitric Oxide Donors / Q000737:chemistry*; D011140:Polyurethanes / Q000737:chemistry; D019736:Prostheses and Implants; D012680:Sensitivity and Specificity; D034421:Sus scrofa
chemical_list: D001786:Blood Glucose; D020030:Nitric Oxide Donors; D011140:Polyurethanes; D009569:Nitric Oxide; D005947:Glucose