Title:Design and Biological Evaluation of Cephalosporin Based Metallo-β-lactamase (MBL) Inhibitors
Volume: 21
Issue: 16
Author(s): Shaan Patel*, Pradip Jadav*, Rajesh Bahekar, Kumargurubaran Nagaswamy, Kasinath Viswanathan, Purvi Vyas, Poonam Giri, S. Sachchidanand and Mukul Jain
Affiliation:
- Cygnus World School, 86W8+CWJ, Motnath Mahadev Mandir Road, Near Motnath Mahadev Temple, Harni, Vadodara,
Gujarat, 390022, India
- Department of Medicinal Chemistry, Zydus Research Centre, Sarkhej-Bavla N.H. 8A Moraiya,
Ahmedabad, 382210, India
- Department of Medicinal Chemistry, Zydus Research Centre, Sarkhej-Bavla N.H. 8A Moraiya,
Ahmedabad, 382210, India
Keywords:
Antibiotic (Abs), antibiotic resistance, metallo-β-lactamase (MBL) enzymes, 8-thioquinoline (8-TQ), cephalosporin based MBL inhibitors (Cef-MBLi), conjugates, enzyme inhibition.
Abstract:
Background: Prevalence of microbial resistance due to Metallo-β-lactamase (MBL) enzyme
pose a serious threat to human life. MBLs depend on active site zinc for their hydrolytic activity;
hence, the investigation of zinc chelators emerged as an attractive strategy for the development of
potent MBL inhibitors.
Methods: To prove that such chelators selectively target MBLs, in the present investigation, novel
cephalosporins based MBL inhibitors (Cef-MBLi) were designed as a conjugate of cephalosporins
with a potent zinc binder 8-thioquinoline (8-TQ).
Results: Cef-MBLi showed site specific release of conjugate only in the presence of a Veronaintegron
encoded metallo-β-lactamase 2 (VIM-2) bacterial enzyme through hydrolytic cleavage
mechanism. A total of 6 (4a-e and 6f) New Chemical Entities (NCE’s) were prepared, characterized
and subjected for in vitro study.
Conclusion: Among tested NCE’s, 4c showed potent MBL inhibitory activity against the VIM-2
enzyme.