Cookies

We use cookies to ensure that we give you the best experience on our website. You can change your cookie settings at any time. Otherwise, we'll assume you're OK to continue.


Durham Research Online
You are in:

A carbohydrate-antioxidant hybrid polymer reduces oxidative damage in spermatozoa and enhances fertility.

Fleming, C. and Maldjian, A. and Costa, D. Da and Rullay, A. K. and Haddleton, D. M. and John, J. St and Penny, P. and Noble, R. C. and Cameron, N. R. and Davis, B. G. (2005) 'A carbohydrate-antioxidant hybrid polymer reduces oxidative damage in spermatozoa and enhances fertility.', Nature chemical biology., 1 (5). pp. 270-274.

Abstract

Gamete-gamete interactions are critically modulated by carbohydrate-protein interactions that rely on the carbohydrate-selective recognition of polyvalent carbohydrate structures(1,2). A galactose-binding protein has been identified in mammalian spermatozoa(3) that has similarity to the well-characterized hepatic asialoglycoprotein receptor(4). With the aim of exploiting the ability of this class of proteins to bind and internalize macromolecules displaying galactose, we designed hybrid carbohydrate-antioxidant polymers to deliver antioxidant vitamin E (alpha-tocopherol) to porcine spermatozoa. Treatment of sperm cells with one hybrid polymer in particular produced large increases in intracellular sperm levels of alpha-tocopherol and greatly reduced endogenous fatty acid degradation under oxidative stress. The polymer-treated spermatozoa had enhanced physiological properties and longer half-lives, which resulted in enhanced fertilization rates. Our results indicate that hybrid polymer delivery systems can prolong the functional viability of mammalian spermatozoa and improve fertility rates, and that our functionally guided optimization strategy can be applied to the discovery of active glycoconjugate ligands.

Item Type:Article
Full text:Full text not available from this repository.
Publisher Web site:http://dx.doi.org/10.1038/nchembio730
Record Created:15 May 2007
Last Modified:08 Apr 2009 16:31

Social bookmarking: del.icio.usConnoteaBibSonomyCiteULikeFacebookTwitterExport: EndNote, Zotero | BibTex
Usage statisticsLook up in GoogleScholar | Find in a UK Library