Abstract

The nature of the rapidly adsorbed protein layer observed on all materials immersed in biological fluids may be the critical determinant dictating the success of medical implants. Adsorbed proteins may retain a structure close to that in solution or may conformationally adjust in response to local environments. This may be the communication link between surface and cell that mediates biological response. SIMS provides a relatively flexible method to study these conformational changes;
the aim of this project is to so utilize the technique. Initial efforts are being focused on fibrinogen and streptavidin on various substrates.

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
Biotechnology Resource Grants (P41)
Project #
5P41RR001296-12
Application #
5223118
Study Section
Project Start
Project End
Budget Start
Budget End
Support Year
12
Fiscal Year
1996
Total Cost
Indirect Cost

  Publications

Tyler, Bonnie J; Peterson, Richard E (2013) Dead-time correction for time-of-flight secondary-ion mass spectral images: a critical issue in multivariate image analysis. Surf Interface Anal 45:475-478
Tyler, B J; Bruening, C; Rangaranjan, S et al. (2011) TOF-SIMS imaging of adsorbed proteins on topographically complex surfaces with Bi(3) (+) primary ions. Biointerphases 6:135
Medzihradszky, Katalin F (2008) Characterization of site-specific N-glycosylation. Methods Mol Biol 446:293-316
Medzihradszky, Katalin F (2005) Peptide sequence analysis. Methods Enzymol 402:209-44
Sanders, Joan E; Lamont, Sarah E; Karchin, Ari et al. (2005) Fibro-porous meshes made from polyurethane micro-fibers: effects of surface charge on tissue response. Biomaterials 26:813-8
Medzihradszky, Katalin F (2005) In-solution digestion of proteins for mass spectrometry. Methods Enzymol 405:50-65
Medzihradszky, Katalin F (2005) Characterization of protein N-glycosylation. Methods Enzymol 405:116-38
Martin, Stephanie M; Schwartz, Jeffrey L; Giachelli, Cecilia M et al. (2004) Enhancing the biological activity of immobilized osteopontin using a type-1 collagen affinity coating. J Biomed Mater Res A 70:10-9
Cheng, Xuanhong; Wang, Yanbing; Hanein, Yael et al. (2004) Novel cell patterning using microheater-controlled thermoresponsive plasma films. J Biomed Mater Res A 70:159-68
Wagner, Victoria E; Koberstein, Jeffrey T; Bryers, James D (2004) Protein and bacterial fouling characteristics of peptide and antibody decorated surfaces of PEG-poly(acrylic acid) co-polymers. Biomaterials 25:2247-63

Showing the most recent 10 out of 120 publications