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Antimicrobial Effect of Zophobas morio Hemolymph against Bovine Mastitis Pathogens

Mengze Du1, Xiaodan Liu1, Jiajia Xu1

  • 1Department of Veterinary Clinical Sciences, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China.

Microorganisms
|October 1, 2020
PubMed

Insights

Zophobas morio hemolymph shows promise for treating bovine mastitis. It effectively kills bacteria, prevents pathogen adhesion to mammary cells, and reduces inflammation, offering a novel therapeutic approach.

Area of Science:

  • Veterinary Immunology
  • Microbiology
  • Cell Biology

Background:

  • Bovine mastitis, caused by bacteria like coliforms and Staphylococcus, is a significant challenge in dairy farming.
  • Current antibiotic treatments for bovine mastitis are often ineffective, especially against polymicrobial infections.

Purpose of the Study:

  • To investigate the protective effects of Zophobas morio (Z. morio) hemolymph against bacterial infections in bovine mammary epithelial cells.
  • To explore the potential of Z. morio hemolymph as a novel therapeutic agent for bovine mastitis.

Main Methods:

  • Assessing the direct antimicrobial activity of Z. morio hemolymph against Gram-positive and Gram-negative bacteria.
  • Evaluating the hemolymph's ability to prevent bacterial adhesion to bovine mammary epithelial (MAC-T) cells.
  • Analyzing the impact of Z. morio hemolymph on inflammatory pathways, including NLRP3 inflammasome activation and pyroptosis.

Main Results:

  • Z. morio hemolymph demonstrated direct bactericidal activity via membrane permeation.
  • The hemolymph inhibited the adhesion of E. coli and S. simulans to MAC-T cells.
  • Z. morio hemolymph downregulated NLRP3, caspase-1, and NLRP6 expression, and inhibited IL-1β and IL-18 secretion, thereby attenuating pyroptosis.

Conclusions:

  • Zophobas morio hemolymph exhibits significant protective effects against bacterial infections in bovine mammary cells.
  • The hemolymph's antimicrobial and anti-inflammatory properties suggest its potential as a novel therapeutic candidate for bovine mastitis.
Keywords:
Zophobas morio 1antimicrobial hemolymph 2bovine mastitis 3inflammasome 4pyroptosis 5

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