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  • Title: Recombinant expression systems: the obstacle to helminth vaccines?
    Author: Geldhof P, De Maere V, Vercruysse J, Claerebout E.
    Journal: Trends Parasitol; 2007 Nov; 23(11):527-32. PubMed ID: 17945533.
    Abstract:
    The need for alternative ways to control helminth parasites has in recent years led to a boost in vaccination experiments with recombinant antigens. Despite the use of different expression systems, only a few recombinants induced high levels of protection against helminths. This is often attributed to the limitations of the current expression systems. Therefore, the need for new systems that can modify and glycosylate the expressed antigens has been advocated. However, analysis of over 100 published vaccine trials with recombinant helminth antigens indicates that it is often not known whether the native parasite antigen itself can induce protection or, if it does, which epitopes are important. This information is vital for a well-thought-out strategy for recombinant production. So, in addition to testing more expression systems, it should be considered that prior evaluation and characterization of the native antigens might help the development of recombinant vaccines against helminths in the long term.
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