PMID- 15993840 OWN - NLM STAT- MEDLINE DCOM- 20050915 LR - 20181201 IS - 0006-291X (Print) IS - 0006-291X (Linking) VI - 334 IP - 1 DP - 2005 Aug 19 TI - Rational design of an EGF-IL18 fusion protein: implication for developing tumor therapeutics. PG - 157-61 AB - Interleukin-18 (IL-18) is a proinflammatory cytokine. This protein has a role in regulating immune responses and exhibits significant anti-tumor activities. Epidermal growth factor (EGF) is an important growth factor that plays a central role in the regulation of cell cycle and differentiation. It was proposed that a targeted delivery of IL-18 by generation of IL-18-EGF fusion protein might decrease adverse effects and result in enhancing cytotoxic and antitumor activities. In the present study, a fusion protein, consisting of EGFR binding domain fused to human IL-18 mature peptide via a linker peptide of (Gly(4)Ser) 3, was constructed and expressed in the insect cell line Sf9 using Bac-to-Bac baculovirus expression system. We showed that the purified recombinant fusion protein induced similar levels of IFN-gamma to that of native IL-18 protein in human PBMC in the presence of ConA. Furthermore, EGF receptor competitive test in human epithelial cancer A431 cell line showed that EGF-IL18 fusion protein can specifically bind with EGFR by competing with native EGF protein. These suggest that this rationally designed protein can be further developed as novel tumor therapeutics. FAU - Lu, Jian-Xin AU - Lu JX AD - Institute of Cellular and Molecular Medicine, School of Laboratory Medicine, Wenzhou Medical College, Wenzhou, Zhejiang 325035, China. FAU - Peng, Ying AU - Peng Y FAU - Meng, Zhe-Feng AU - Meng ZF FAU - Jin, Li-Qin AU - Jin LQ FAU - Lu, Yong-Sui AU - Lu YS FAU - Guan, Min-Xin AU - Guan MX LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Biochem Biophys Res Commun JT - Biochemical and biophysical research communications JID - 0372516 RN - 0 (Interleukin-18) RN - 0 (Recombinant Fusion Proteins) RN - 62229-50-9 (Epidermal Growth Factor) RN - EC 2.7.10.1 (ErbB Receptors) SB - IM MH - Animals MH - Carcinoma, Squamous Cell/genetics/*metabolism/therapy MH - Cell Line MH - Drug Delivery Systems/*methods MH - *Drug Design MH - Epidermal Growth Factor/genetics/*metabolism/therapeutic use MH - ErbB Receptors/*metabolism MH - Gene Targeting/*methods MH - Humans MH - Interleukin-18/genetics/*metabolism/therapeutic use MH - Protein Engineering/*methods MH - Recombinant Fusion Proteins/metabolism MH - Spodoptera/genetics/*metabolism MH - Transfection/methods EDAT- 2005/07/05 09:00 MHDA- 2005/09/16 09:00 CRDT- 2005/07/05 09:00 PHST- 2005/05/17 00:00 [received] PHST- 2005/06/13 00:00 [accepted] PHST- 2005/07/05 09:00 [pubmed] PHST- 2005/09/16 09:00 [medline] PHST- 2005/07/05 09:00 [entrez] AID - S0006-291X(05)01267-2 [pii] AID - 10.1016/j.bbrc.2005.06.076 [doi] PST - ppublish SO - Biochem Biophys Res Commun. 2005 Aug 19;334(1):157-61. doi: 10.1016/j.bbrc.2005.06.076.