Abstract
Objective: The glutathione transferases (GSTs) are a family of widely distributed Phase II detoxification enzymes that catalyse the conjugation of exogenius and endogenius electrophilic and hydrophobic compounds. GSTP1-1 is frequently overexpressed in rat and human tumours. It is suggested that overexpression of hGSTP1-1 by human tumor cells may play a role in multi drug resistance (MDR) to cancer chemotherapy. Hence, hGSTP1-1 can be a promising target for cancer treatment. The aim of this study is to design new hGSTP1-1 inhibitors.
Material and Method: a series of sulfonamidobenzothiazole derivatives which are thought to act as prodrug have been designed based on the 5F-203 compound. To examine the interactions of these compounds with the hGSTP1-1 enzyme, molecular docking studies were carried out, by using the Schrodinger Maestro Software.
Result and Discussion: In this study, considering the compound 5F-203, it is thought that the compounds thought to be effective in the form of prodrugs may exhibit antitumor properties by releasing 5F-203 and its derivative compounds by hydrolysis during metabolism by GST enzyme. It has been observed that all of the compounds have strong interactions with the enzyme hGSTP1-1, according to the doking studies conducted to examine the interactions of the designed compounds with the enzyme hGSTP1-1. It was determined that all of the compounds showed hydrogen bonding with Arg13 and Tyr7, which are important for hGSTP1-1 enzyme inhibition, and pi-pi interactions with Tyr108. As a next step, the synthesis of these compounds will be carried out and their effects on the enzyme hGSTP1-1 will be tested experimentally. Thus, by defining structure-activity relationships, it can be possible to design more effective new compounds and increase the effectiveness of anticancer drugs by inhibiting the resistance mechanism.