PMID- 30933891 OWN - NLM STAT- MEDLINE DCOM- 20190816 LR - 20190816 IS - 1532-2661 (Electronic) IS - 0034-5288 (Linking) VI - 124 DP - 2019 Jun TI - In-vitro binding analysis of anti-human vascular endothelial growth factor antibodies bevacizumab and aflibercept with canine, feline, and equine vascular endothelial growth factor. PG - 233-238 LID - S0034-5288(18)31534-0 [pii] LID - 10.1016/j.rvsc.2019.03.018 [doi] AB - PURPOSE: Promising results have been described for antibodies binding vascular endothelial growth factor (VEGF) in patients with corneal neovascularization. Whether veterinary patients would also benefit from this therapeutic approach has not been investigated yet. We examined binding properties of anti-human VEGF antibodies bevacizumab (Avastin(R)) and aflibercept (Zaltrap(R)) for canine, feline, and equine VEGF. METHODS: Human, equine, feline, and canine VEGF were analyzed for sequence similarity using the "Basic Local Alignment Search Tool" (BLAST). Western-blot analysis and ELISA were used to assess binding properties. RESULTS: BLAST analysis revealed a sequence homology of canine, feline, and equine VEGF to human VEGF-A of 93%, 92%, and 89%, respectively. Western-blot analysis showed immunoreactivity of bevacizumab with human, canine, and feline VEGF, but not with equine VEGF. Aflibercept recognized VEGF of all tested species. ELISA data indicated that bevacizumab and aflibercept bind canine VEGF in a dose-dependent manner. Feline VEGF was bound by bevacizumab and aflibercept in a dose-independent manner. ELISA study further confirmed the lack of bevacizumab binding to equine VEGF, and yielded also a dose-independent binding by aflibercept. CONCLUSIONS: Bevacizumab and aflibercept turned out to bind VEGF with species-specific differences. Further studies are required to investigate their efficacy and safety under clinical conditions. CI - Copyright (c) 2019 Elsevier Ltd. All rights reserved. FAU - Muellerleile, Lisa-Marie AU - Muellerleile LM AD - Department for Companion Animals and Horses, University of Veterinary Medicine Vienna, Austria. Electronic address: lisa-marie.muellerleile@vetmeduni.ac.at. FAU - Buxbaum, Bernhard AU - Buxbaum B AD - Department for Companion Animals and Horses, University of Veterinary Medicine Vienna, Austria. FAU - Nell, Barbara AU - Nell B AD - Department for Companion Animals and Horses, University of Veterinary Medicine Vienna, Austria. Electronic address: barbara.nell@vetmeduni.ac.at. FAU - Fux, Daniela A AU - Fux DA AD - Department for Biomedical Sciences, Institute of Pharmacology and Toxicology, University of Veterinary Medicine Vienna, Austria. Electronic address: daniela.fux@vetmeduni.ac.at. LA - eng PT - Journal Article DEP - 20190322 PL - England TA - Res Vet Sci JT - Research in veterinary science JID - 0401300 RN - 0 (Angiogenesis Inhibitors) RN - 0 (Recombinant Fusion Proteins) RN - 0 (Vascular Endothelial Growth Factor A) RN - 15C2VL427D (aflibercept) RN - 2S9ZZM9Q9V (Bevacizumab) RN - EC 2.7.10.1 (Receptors, Vascular Endothelial Growth Factor) MH - Angiogenesis Inhibitors/*metabolism MH - Animals MH - Bevacizumab/*metabolism MH - Blotting, Western MH - Cats/*metabolism MH - Dogs/*metabolism MH - Enzyme-Linked Immunosorbent Assay MH - Horses/*metabolism MH - Humans MH - Protein Binding MH - Receptors, Vascular Endothelial Growth Factor/*metabolism MH - Recombinant Fusion Proteins/*metabolism MH - Vascular Endothelial Growth Factor A/*metabolism OTO - NOTNLM OT - Aflibercept OT - Anti-VEGF OT - Bevacizumab OT - Species cross-reactivity OT - VEGF-A EDAT- 2019/04/02 06:00 MHDA- 2019/08/17 06:00 CRDT- 2019/04/02 06:00 PHST- 2018/08/28 00:00 [received] PHST- 2019/02/20 00:00 [revised] PHST- 2019/03/21 00:00 [accepted] PHST- 2019/04/02 06:00 [pubmed] PHST- 2019/08/17 06:00 [medline] PHST- 2019/04/02 06:00 [entrez] AID - S0034-5288(18)31534-0 [pii] AID - 10.1016/j.rvsc.2019.03.018 [doi] PST - ppublish SO - Res Vet Sci. 2019 Jun;124:233-238. doi: 10.1016/j.rvsc.2019.03.018. Epub 2019 Mar 22.