Ghorbani, Farzaneh, Fathi, Farzaneh, Aghebati-Maleki, Leili, Abolhasan, Rozita, Rikhtegar, Reza, Dolatabadi, Jafar Ezzati Nazhad, Babaloo, Zohreh, Khalilzadeh, Balal, Ebrahimi-Warkiani, Majid, Sharifzadeh, Zahra, Rashidi, Mohammad-Reza, and Yousefi, Mehdi
• The interaction between three anti-c-Met scFvs (ES1, ES2, and ES3) and this peptide was studied using SPR technique. • Kinetic parameters showed that ES1 has the highest affinity toward c-Met peptide. • Hydrophobic forces play major role in the interaction of c-Met with ES1 and the binding procedure was endothermic. Mesenchymal epithelial transition factor (c-Met) has been recently regarded as an attractive target for the treatment of cancer. Our previous study showed that c-Met-specific single chain fragment variables (scFvs) can be considered as a promising therapy for cancer, however, their molecular interaction with c-Met protein have not been assessed. Accordingly, in the current study we aim to evaluate the kinetic and thermodynamic properties of c-Met interaction with these scFvs as anticancer agents by means of surface plasmon resonance (SPR) technique. Phage-scFvs were immobilized on the 11-mercaptoundecanoic acid gold chips after carboxylic groups activation by N-ethyl-N-(3-diethylaminopropyl) carbodiimide/N-hydroxysuccinimide and, then the c-Met binding to each scFvs (ES1, ES2, and ES3) at different concentrations (ranging from 20 to 665 μM) was explored. Kinetic studies revealed that ES1 has the highest affinity (K D = 3.36 × 10−8) toward its target at 25°C. Calculation of thermodynamic parameters also showed positive values for enthalpy and entropy changes, which was representative of hydrophobic forces between c-Met and ES1. Furthermore, the positive value of Gibbs free energy indicated that c-Met binding to ES1 was enthalpy-driven. Taken together, we concluded that produced ES1 can be applied as promising scFv-based therapy for diagnosis or targeting of c-Met in various cancers. [ABSTRACT FROM AUTHOR]