“This study demonstrates that meat grown from cells can change in ways that matter for food allergies,” says Renwick Dobson, a corresponding author of the research. “Our results show why food safety assessments for cultivated meat need to look carefully at allergy-related proteins, rather than assuming they behave the same as those in conventional meat.”
Cultivated meat, often referred to as lab-grown meat, involves the cultivation of animal muscle cells under controlled conditions. As these cells develop, they produce varying amounts of proteins compared to those in live animals. While previous research indicated that cultivated fish cells contained fewer allergy-linked proteins than conventional seafood, data on allergens in other cultivated meats, such as beef, remains limited. This includes studies on traditional beef protein allergens or sensitivity to alpha-gal, a sugar in red meat that can trigger allergies following a lone star tick bite.
A research team led by Laura Domigan and Dobson sought to address this gap by comparing the protein composition and allergenic potential of cultured beef cells to traditional steak. Using male cow muscle cells, the researchers cultured them under established protocols for various durations and analyzed their protein profiles against those of regular beef steak. The findings revealed that while the protein compositions of cultured cells were consistent among themselves, they differed significantly from traditional steak. Most identified allergenic proteins were present at similar or lower levels in the cultured cells compared to regular beef, with the exception of three proteins. These proteins, although not classified as meat allergens by the World Health Organization, can react with immunoglobulin E (IgE) and potentially trigger immune responses or allergic reactions in some individuals.
Understanding the Allergy Dynamics
Further experiments using blood samples from individuals with known meat allergies showed reduced IgE binding to both undigested and digested cultured cells compared to regular steak. This aligns with the differing levels of allergen-related proteins. However, the cultured beef cells elicited a strong IgE response in blood samples from two individuals sensitive to alpha-gal. The researchers suggest this may be due to a higher presence of alpha-gal-modified proteins in the cultured cells.
“These findings indicate cultured beef cells show lower allergy-related hazard relative to classic beef allergens but higher allergy-related hazard relative to alpha-gal-associated responses.”
The team’s next step involves expanding tests to the final cultivated meat products. This development comes as the food industry increasingly looks to lab-grown meats as a sustainable alternative to traditional livestock farming, which is often criticized for its environmental impact.
The Broader Implications for Cultivated Meat
The emergence of cultivated meats represents a significant shift in how meat products could be produced and consumed. The potential benefits include reduced greenhouse gas emissions, decreased land and water use, and the elimination of ethical concerns associated with animal slaughter. However, as this study highlights, ensuring the safety and acceptability of these products requires comprehensive assessments of their allergenic potential.
Dobson emphasizes the need for collaboration among scientific, regulatory, and clinical teams to ensure that cultivated meats are not only safe and sustainable but also accepted and trusted by the public. “Only through this ongoing collaboration can cultivated meat achieve its promise as a viable, responsible, and widely accepted alternative to conventional meat,” he concludes.
Looking Forward: The Path to Acceptance
The development of cultivated meats will require overcoming several hurdles, including consumer skepticism and regulatory challenges. Public perception plays a crucial role in the widespread acceptance of new food technologies. As such, transparent communication about the safety and benefits of lab-grown meats will be essential.
Moreover, regulatory frameworks must evolve to address the unique characteristics of cultivated meats. This includes establishing guidelines for food safety assessments that consider the potential for novel allergens and other health impacts. The research conducted by Dobson and his team is a step in this direction, providing valuable insights that could inform future regulatory policies.
The authors acknowledge funding from the Riddet Institute; Food Transitions 2050; the Biomolecular Interaction Centre; and the Dutch Ministry of Agriculture, Fisheries, Food Security, and Nature. As the field of cultivated meat continues to grow, ongoing research and collaboration will be vital to realizing its full potential as a sustainable and safe food source.
