The glycosylation of alpha-1-antitrypsin expressed in transgenic mice

Kemp, P.A. and Freedman, R.B. and Clark, A.J. and Jenkins, N. (1997) The glycosylation of alpha-1-antitrypsin expressed in transgenic mice. In: 8th Annual Meeting of the Japanese-Association-for-Animal-Cell-Technology, Nov 06-10, 1995, Iizuka, Japan. (The full text of this publication is not available from this repository)

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Abstract

Alpha-l-Antitrypsin (AAT) is a serine protease inhibitor whose main physiological role is the control of neutrophil elastase. In AAT deficiency disorders, mutants are poorly secreted or have low stability leading to emphysema and liver disease. AAT has three N-linked glycosylation sites; the unglycosylated protein is fully active but has a much reduced half-life in the circulation. Therefore, for therapeutic use large quantities of fully glycosylated AAT are required. Transgenic animals that express human AAT in mammary tissue have the potential to be used as bioreactors. Their ability to glycosylate the recombinant protein is crucial. AAT has been purified from human plasma and transgenic mouse milk, the glycopeptides isolated and the glycosylation microheterogeneity characterised. The major N-glycans identified from recombinant human AAT purified from transgenic mouse milli and from human plasma were complex sialylated biantennary structures. However, individual mice showed variation in site occupancy, the degree of fucosylation and the range of minor N-glycan structures detected.

Item Type: Conference or workshop item (Paper)
Subjects: Q Science
Q Science > QH Natural history > QH301 Biology
Divisions: Faculties > Science Technology and Medical Studies > School of Biosciences
Depositing User: M.A. Ziai
Date Deposited: 21 Sep 2009 12:31
Last Modified: 30 May 2012 10:52
Resource URI: http://kar.kent.ac.uk/id/eprint/18140 (The current URI for this page, for reference purposes)
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