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Discovery and Characterization of a Potent Interleukin-6 Binding Peptide with Neutralizing Activity In Vivo

Interleukin-6 (IL-6) is an important member of the cytokine superfamily, exerting pleiotropic actions on many physiological processes. Over-production of IL-6 is a hallmark of immune-mediated inflammatory diseases such as Castleman’s Disease (CD) and rheumatoid arthritis (RA). Antagonism of the inte...

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Detalles Bibliográficos
Autores principales: Ranganath, Sheila, Bhandari, Ashok, Avitahl-Curtis, Nicole, McMahon, Jaimee, Wachtel, Derek, Zhang, Jenny, Leitheiser, Christopher, Bernier, Sylvie G., Liu, Guang, Tran, Tran T., Celino, Herodion, Tobin, Jenny, Jung, Joon, Zhao, Hong, Glen, Katie E., Graul, Chris, Griffin, Aliesha, Schairer, Wayne C., Higgins, Carolyn, Reza, Tammi L., Mowe, Eva, Rivers, Sam, Scott, Sonya, Monreal, Alex, Shea, Courtney, Bourne, Greg, Coons, Casey, Smith, Adaline, Tang, Kim, Mandyam, Ramya A., Masferrer, Jaime, Liu, David, Patel, Dinesh V., Fretzen, Angelika, Murphy, Craig A., Milne, G. Todd, Smythe, Mark L., Carlson, Kenneth E.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4640888/
https://www.ncbi.nlm.nih.gov/pubmed/26555695
http://dx.doi.org/10.1371/journal.pone.0141330
Descripción
Sumario:Interleukin-6 (IL-6) is an important member of the cytokine superfamily, exerting pleiotropic actions on many physiological processes. Over-production of IL-6 is a hallmark of immune-mediated inflammatory diseases such as Castleman’s Disease (CD) and rheumatoid arthritis (RA). Antagonism of the interleukin IL-6/IL-6 receptor (IL-6R)/gp130 signaling complex continues to show promise as a therapeutic target. Monoclonal antibodies (mAbs) directed against components of this complex have been approved as therapeutics for both CD and RA. To potentially provide an additional modality to antagonize IL-6 induced pathophysiology, a peptide-based antagonist approach was undertaken. Using a combination of molecular design, phage-display, and medicinal chemistry, disulfide-rich peptides (DRPs) directed against IL-6 were developed with low nanomolar potency in inhibiting IL-6-induced pSTAT3 in U937 monocytic cells. Targeted PEGylation of IL-6 binding peptides resulted in molecules that retained their potency against IL-6 and had a prolongation of their pharmacokinetic (PK) profiles in rodents and monkeys. One such peptide, PN-2921, contained a 40 kDa polyethylene glycol (PEG) moiety and inhibited IL-6-induced pSTAT3 in U937 cells with sub-nM potency and possessed 23, 36, and 59 h PK half-life values in mice, rats, and cynomolgus monkeys, respectively. Parenteral administration of PN-2921 to mice and cynomolgus monkeys potently inhibited IL-6-induced biomarker responses, with significant reductions in the acute inflammatory phase proteins, serum amyloid A (SAA) and C-reactive protein (CRP). This potent, PEGylated IL-6 binding peptide offers a new approach to antagonize IL-6-induced signaling and associated pathophysiology.