From target identification to intervention: Tackling microbial contamination challenges in cultivated meat production...

Area of Science:

• Food Science
• Microbiology
• Biotechnology

Background:

• Microbial contamination poses a significant risk to the cultivated meat industry.
• Understanding microbial communities in cell culture environments is crucial for prevention.

Purpose of the Study:

• To identify and characterize microbial contaminants in cultivated meat production.
• To develop an effective antimicrobial strategy against these contaminants.
• To assess the safety of the antimicrobial agent on cell cultures.

Main Methods:

• Isolation and identification of six key microbial contaminants.
• Whole Genome Sequencing (WGS) for functional mapping of microbial communities.
• Assembly of a synthetic microbial community (SynCom) for worst-case scenario simulation.
• Screening of 11 antimicrobial peptides and proteins.
• Minimum Inhibitory Concentration (MIC) determination.
• Long-term suppression assays and cell proliferation/metabolic activity monitoring.

Main Results:

• Identified six microbial contaminants with potential for metabolic complementarity.
• Synthetic peptide 1018-k6 demonstrated potent antimicrobial activity with an MIC of 37.5 μg/mL against the SynCom.
• Complete microbial inhibition was maintained for 14 days at high bacterial loads (10^6 CFU/mL).
• The effective dose of 1018-k6 showed no adverse effects on cell proliferation or metabolic activity.

Conclusions:

• Synthetic peptide 1018-k6 is a highly effective antimicrobial agent against a simulated worst-case microbial contamination scenario in cultivated meat production.
• This peptide offers a potential microbial barrier for animal component-free cellular agriculture.
• The findings support the development of robust contamination control strategies for the growing cultivated meat industry.