Journal
MICROORGANISMS
Volume 8, Issue 10, Pages -Publisher
MDPI
DOI: 10.3390/microorganisms8101488
Keywords
Zophobas morio 1; antimicrobial hemolymph 2; bovine mastitis 3; inflammasome 4; pyroptosis 5
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Funding
- National Key R&D Program of China [2017YFD0502200]
- National Natural Science Foundation of China [31873034, 31672613]
- Beijing Dairy Industry Innovation Team
- China Agricultural University
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Coliforms and Staphylococcus spp. infections are the leading causes of bovine mastitis. Despite extensive research and development in antibiotics, they have remained inadequately effective in treating bovine mastitis induced by multiple pathogen infection. In the present study, we showed the protective effect of Zophobas morio (Z. morio) hemolymph on bovine mammary epithelial cells against bacterial infection. Z. morio hemolymph directly kills both Gram-positive and Gram-negative bacteria through membrane permeation and prevents the adhesion of E. coli or the clinically isolated S. simulans strain to bovine mammary epithelial (MAC-T) cells. In addition, Z. morio hemolymph downregulates the expression of nucleotide-binding oligomerization domain (NOD)-like receptor family member pyrin domain-containing protein 3 (NLRP3), caspase-1, and NLRP6, as well as inhibits the secretion of interleukin-1 beta (IL-1 beta) and IL-18, which attenuates E. coli or S. simulans-induced pyroptosis. Overall, our results suggest the potential role of Z. morio hemolymph as a novel therapeutic candidate for bovine mastitis.
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