Daidzein-directed methionine γ-lyase in enzyme prodrug therapy against breast cancer

• DOI: 10.1016/j.biochi.2022.05.007
• Publication Date: 2022-06-20T15:36:54Z
• Authors: E. Morozova; L. Abo Qoura; N. Anufrieva; V. Koval; E. Lesnova; A. Kushch; V. Kulikova; S. Revtovich; V.S. Pokrovsky; T. Demidkina
• Keywords: Lyase

Thiosulfinates in situ formed by "pharmacological pair" C115H methionine γ-lyase/S-(allyl/alkyl)-l-cysteine sulfoxides possess cytotoxic activity against various malignant cell lines. To investigate in vivo antitumor activity of thiosulfinates generated directly at the surface of tumor cells, a chemical conjugate between Clostridium novyi C115H methionine γ-lyase (C115H MGL) and isoflavone daidzein was prepared. The binding of conjugate (C115H-Dz) to various breast cancer cell lines was demonstrated, as well as its cytotoxicity in the presence of S-(allyl/alkyl)-l-cysteine sulfoxides. The most promising among thiosulfinates was dipropyl thiosulfinate (IC50 < 0.53 μM). The pharmacokinetic parameters of C115H MGL and C115H-Dz were obtained. Plasma half-lives of the enzyme and conjugated enzyme were 4.4 and 7.2 h, respectively. In vivo antitumor effect of pharmacological pairs on SKBR-3 xenografts was demonstrated. Treatment of tumor-bearing mice with a pair of C115H-Dz/propiin inhibited tumor growth by 85%.