Molecular grafting onto a stable framework yields novel cyclic peptides for the treatment of multiple sclerosis

Conan K Wang, Christian W Gruber, Masa Cemazar, Christopher Siatskas, Prascilla Tagore, Natalie Lisa Payne, Guizhi Sun, Shunhe Wang, Claude Charles Andre Bernard, David J Craik

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Multiple sclerosis (MS) is an inflammatory disease of the central nervous system (CNS) and is characterized by the destruction of myelin and axons leading to progressive disability. Peptide epitopes from CNS proteins, such as myelin oligodendrocyte glycoprotein (MOG), possess promising immunoregulatory potential for treating MS; however, their instability and poor bioavailability is a major impediment for their use clinically. To overcome this problem, we used molecular grafting to incorporate peptide sequences from the MOG35-55 epitope onto a cyclotide, which is a macrocyclic peptide scaffold that has been shown to be intrinsically stable. Using this approach, we designed novel cyclic peptides that retained the structure and stability of the parent scaffold. One of the grafted peptides, MOG3, displayed potent ability to prevent disease development in a mouse model of MS. These results demonstrate the potential of bioengineered cyclic peptides for the treatment of MS.
Original languageEnglish
Pages (from-to)156 - 163
Number of pages8
JournalACS Chemical Biology
Issue number1
Publication statusPublished - 2014

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