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- W2011057428 abstract "Pertussis toxin (PT) is used in its formaldehyde-detoxified form in acellular pertussis vaccines for preventing whooping cough in children. The effects of formaldehyde treatment (up to 0.5% (w/v) formaldehyde) on the size, molecular association, folding and monoclonal antibody (mAb) binding of PT were studied to further define the structural nature of the high molecular weight species as related to their epitope integrity. Analytical ultracentrifugation (AUC) demonstrated that formaldehyde treatment of PT prevented the dissociation of the holotoxin. Together with results from size exclusion chromatography (SEC), SEC/multi-angle laser light scattering (MALLS) and immunoblotting it was demonstrated that PT increased in molecular weight and heterogeneity as a function of formaldehyde concentration, caused at least in part by covalent cross-linking. Five mAbs specific for PT subunits (S1-S5) bound to the cross-linked species, although there was some loss of epitopes in the larger aggregates. Intrinsic fluorescence spectroscopy gave evidence of progressive unfolding and re-association of PT. These findings demonstrate that a favourable balance between protein stabilisation and denaturation may be achieved by the treatment of pertussis toxin with formaldehyde, and provides a basis for determining the significance of high molecular weight cross-linked species of pertussis toxin in protection against whooping cough." @default.
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- W2011057428 date "2003-06-01" @default.
- W2011057428 modified "2023-09-26" @default.
- W2011057428 title "Novel configurations of high molecular weight species of the pertussis toxin vaccine component" @default.
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- W2011057428 doi "https://doi.org/10.1016/s0264-410x(03)00105-1" @default.
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