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French JM, McIndoo ER, Schlund CM, Field KP, Wolfe AR, Stevens DL, Aldape MJ, Hobdey SE. Characterization of Paeniclostridium sordellii Metalloproteinase-1 in vitro and in an experimental model of infection. Anaerobe 2021; 77:102468. [PMID: 34688909 DOI: 10.1016/j.anaerobe.2021.102468] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 10/12/2021] [Accepted: 10/19/2021] [Indexed: 11/28/2022]
Abstract
OBJECTIVE Paeniclostridium sordellii is a pathogen that causes rapidly fatal infections characterized by severe edema, extreme leukemoid reaction and lack of an innate immune response. We recently identified a metalloproteinase of P. sordellii-1 (Mcs1) that cleaves human vascular cell adhesion molecule 1, an adhesion molecule important to hematopoietic precursor retention and leukocyte diapedesis. In the current study, we further characterize Mcs1 activity and investigate its role in pathogenesis. METHODS Mcs1 peptide cleavage sequence and activity conditions were identified using a semi-quantitative fluorescence-based reporter assay. Additional host targets for Mcs1 protease activity were tested and confirmed by gel electrophoreses and western blots. Finally, Mcs1 knock out (ΔMcs1) and complemented (cMcs1) strains were developed for assessment in our animal model of myonecrosis. RESULTS Data show that Mcs1 prefers aliphatic amino acid residues, I or L, especially when adjacent to negatively charged or noncharged-polar residues. In vitro, Mcs1 cleaved or partially cleaved human cell adhesion molecules, E-selectin and intracellular adhesion molecule-1 (ICAM-1), and mediators of innate immune infection defense, complement protein-3 and antimicrobial peptide LL-37. In vivo, infection with the ΔMcs1 P. sordellii strain had little effect on animal survival, tissue destruction or circulating white blood cell counts compared to wild type and cMcs1 strains. CONCLUSIONS Similar to proteolytic virulence factors from other pathogens, Mcs1 is a promiscuous protease that cleaves multiple human-host factors. Despite minimal impact of Mcs1 on the murine model of P. sordellii infection, it is worth considering its role in humans and other animal models.
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Affiliation(s)
- John M French
- Veterans Affairs Medical Center, Boise, ID, 83702, USA; Idaho Veterans Research and Education Foundation, Boise, ID, 83702, USA
| | - Eric R McIndoo
- Veterans Affairs Medical Center, Boise, ID, 83702, USA; Idaho Veterans Research and Education Foundation, Boise, ID, 83702, USA
| | - Caden M Schlund
- Veterans Affairs Medical Center, Boise, ID, 83702, USA; Idaho Veterans Research and Education Foundation, Boise, ID, 83702, USA
| | - Kevin P Field
- Veterans Affairs Medical Center, Boise, ID, 83702, USA; Idaho Veterans Research and Education Foundation, Boise, ID, 83702, USA
| | - Alison R Wolfe
- Veterans Affairs Medical Center, Boise, ID, 83702, USA; Idaho Veterans Research and Education Foundation, Boise, ID, 83702, USA
| | - Dennis L Stevens
- Veterans Affairs Medical Center, Boise, ID, 83702, USA; Idaho Veterans Research and Education Foundation, Boise, ID, 83702, USA; University of Washington School of Medicine, Seattle, WA, 98195, USA
| | | | - Sarah E Hobdey
- Veterans Affairs Medical Center, Boise, ID, 83702, USA; Idaho Veterans Research and Education Foundation, Boise, ID, 83702, USA; Boise State University, Boise, ID, 83725, USA.
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erkan kariper S, Sayın K, Karakaş D. Structural, Spectroscopic and Activity Calculations on Methanesulfonylhydrazone Derivative Chromium Pentacarbonyl Complexes. JOURNAL OF THE TURKISH CHEMICAL SOCIETY, SECTION A: CHEMISTRY 2018. [DOI: 10.18596/jotcsa.428788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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