An affibody-adalimumab hybrid blocks combined IL-6 and TNF-triggered serum amyloid A secretion in vivo
2014 (English)In: mAbs, ISSN 1942-0862, Vol. 6, no 6, 1598-1607 p.Article in journal (Refereed) Published
In inflammatory disease conditions, the regulation of the cytokine system is impaired, leading to tissue damages. Here, we used protein engineering to develop biologicals suitable for blocking a combination of inflammation driving cytokines by a single construct. From a set of interleukin (IL)-6-binding affibody molecules selected by phage display, five variants with a capability of blocking the interaction between complexes of soluble IL-6 receptor a (sIL-6R alpha) and IL6 and the co-receptor gp130 were identified. In cell assays designed to analyze any blocking capacity of the classical or the alternative (trans) signaling IL-6 pathways, one variant, Z(IL-6_13) with an affinity (K-D) for IL-6 of similar to 500 pM, showed the best performance. To construct fusion proteins ("AffiMabs") with dual cytokine specificities, Z(IL-6_13) was fused to either the N-or C-terminus of both the heavy and light chains of the anti-tumor necrosis factor (TNF) monoclonal antibody adalimumab (Humira (R)). One AffiMab construct with Z(IL-6_13) positioned at the N-terminus of the heavy chain, denoted Z(IL-6_13)-HCAda, was determined to be the most optimal, and it was subsequently evaluated in an acute Serum Amyloid A (SAA) model in mice. Administration of the AffiMab or adalimumab prior to challenge with a mix of IL-6 and TNF reduced the levels of serum SAA in a dose-dependent manner. Interestingly, the highest dose (70 mg/kg body weight) of adalimumab only resulted in a 50% reduction of SAA-levels, whereas the corresponding dose of the Z(IL-6_13)-HCAda AffiMab with combined IL-6/TNF specificity, resulted in SAA levels below the detection limit.
Place, publisher, year, edition, pages
2014. Vol. 6, no 6, 1598-1607 p.
AffiMab, Antibody, IL-6, TNF, adalimumab, affibody, affinity, fusion, inflammation
IdentifiersURN: urn:nbn:se:kth:diva-159385DOI: 10.4161/mabs.36089ISI: 000346878600024ScopusID: 2-s2.0-84920827599OAI: oai:DiVA.org:kth-159385DiVA: diva2:785499
FunderSwedish Research Council
QC 201502032015-02-032015-01-292015-04-16Bibliographically approved