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Effects of hydrophilization and immobilization on the interfacial behaviour of immunoglobulins
YKI – Ytkemiska institutet.
YKI – Ytkemiska institutet.
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1996 (English)In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 177, 70-78 p.Article in journal (Refereed)
Abstract [en]

The adsorption and immobilization of rabbit anti-human immunoglobulin (rabbit IgG), as well as the effects on the amount and reactivity of bound rabbit IgG of rinsing with buffer and addition of bovine serum albumin (BSA) or human IgG, were investigated with ellipsometry, TIRF and enzyme immuno assay (EIA). It was found that although rabbit IgG readily adsorbs at hydrophobic hexamethyldisiloxane (HMDSO) plasma polymer surfaces, a substantial fraction of the adsorbed protein molecules are desorbed on rinsing with buffer. BSA was found to adsorb readily at the surfaces obtained after rinsing, although also this protein desorbed to a large extent on further rinsing with buffer. The adsorption of BSA causes a further reduction in the amount of rabbit IgG adsorbed. Immobilization of rabbit IgG to acrylic acid (AA) plasma polymer surfaces, achieved by covalent coupling via a strongly adsorbed PEG-PEI copolymer, was found to overcome the problem of desorption of rabbit IgG on rinsing with buffer or addition of BSA. Furthermore, non-specific adsorption was virtually absent after immobilization. However, covalently bound rabbit IgG reacted strongly with human IgG, as observed by ellipsometry, TIRF and EIA. The immobilization of rabbit IgG to hydrophilized surfaces was found to facilitate the interpretation of EIA results.

Place, publisher, year, edition, pages
1996. Vol. 177, 70-78 p.
Keyword [en]
Adsorption, EIA, ellipsometry, hydrophilization, immobilization, immunoglobulin, TIRF
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-26739OAI: oai:DiVA.org:ri-26739DiVA: diva2:1053742
Note
A963Available from: 2016-12-08 Created: 2016-12-08Bibliographically approved

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