Acta Veterinaria et Zootechnica Sinica ›› 2024, Vol. 55 ›› Issue (5): 2273-2280.doi: 10.11843/j.issn.0366-6964.2024.05.045

• RESEARCH NOTES • Previous Articles    

The Effect of Seven Protease Inhibitors on Activity of DNA Damage Inducible 1 Protein in Echinococcus multilocularis

ZHANG Shengying, LIU Zhongli, GUO Aijiang*, WANG Shuai*   

  1. State Key Laboratory of Veterinary Etiological Biology/Lanzhou Veterinary Research Institute, Lanzhou 730046, China
  • Received:2023-08-03 Online:2024-05-23 Published:2024-05-27

Abstract: As no effective treatment for alveolar echinococcosis (AE) is currently available, the therapeutic drugs are needed urgently. Early stage studies have shown that the protease inhibitors of HIV could also be anticancer and anti-parasitic. The purpose of this paper is to study the effect of the inhibitors (HIV PIs) on the activity of DNA damage inducible 1 protein of Echinococcus multilocularis (EmuDdi1). The recombinant vector pFastBac1-EmuDdi1 was constructed and expressed in Sf9 cell, and the soluble protein was successfully purified in P2 generations. Then the enzyme activity of Ddi1 protein was detected with the specific fluorescent substrates, and the inhibition rate of seven HIV PIs including saquinavir (SQV), ritonavir (RTV), amprenavir (APV), atazanavir (ATV), lopinavir(LPV), fosamprenavir (Fos), tipranavir (TPV) and darunavir (DRV) on Ddi1 protein activity was further examined. The results showed that Emu Ddi1had high affinity and activity, and saquinavir showed the highest inhibition rate at 67% to inhibit protease activity of EmuDdi1 with a IC50 at 34. These results suggested that saquinavir is effcetive to inhibit the activity of Ddi1, and could be used to develop a potential targeting drug for AE.

Key words: protease inhibitors, Echinococcus multilocularis, DNA damage inducible 1 protein, enzyme activity, inhibition rate

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