Abstract
Cellular agriculture aims to meet the growing demand for animal products. However, current production technologies result in low yields, leading to economic projections that prohibit cultivated meat scalability. Here we use tangential flow filtration for continuous manufacturing of cultivated meat to produce biomass of up to 130 × 106 cells per ml, corresponding to yields of 43% w/v and multiple harvests for over 20 days. Continuous manufacturing was carried out in an animal-component-free culture medium for US$0.63 l−1 that supports the long-term, high density culture of chicken cells. Using this empirical data, we conducted a techno-economic analysis for a theoretical production facility of 50,000 l, showing that the cost of cultivated chicken can drop to within the range of organic chicken at US$6.2 lb−1 by using perfusion technology. Whereas other variables would also affect actual market prices, continuous manufacturing can offer cost reductions for scaling up cultivated meat production.
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All data supporting the findings of this study are available within the paper, its Extended Data figures, its Source Data and Supplementary Information. Source data are provided with this paper.
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Acknowledgements
We thank the Sam and Rina Frankel Foundation (donation; Y.N.) and Believer Meats (Y.N.) for funding this work. Further, we thank H. Zukerman Narodizky, M. Gabay, M. Mendelovich, K. Pasternak, A. Bohadana, L. Shirony, A. Keter, A. Fallek and J. Amar for technical support.
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Conceptualization and funding by Y.N. Investigation by L.P., G.W., M.A., N.Y., G.R. and R.K. Methodology by Y.N., L.P., G.W., M.A., N.Y., G.R. and R.K. Writing by Y.N. and L.P.
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Y.N. is a director and shareholder in Believer Meats. G.W., N.Y., G.R., M.A. and R.K. are employees of Believer Meats. The other author declares no competing interests.
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Nature Food thanks Xin Wu and the other, anonymous, reviewer(s) for their contribution to the peer review of this work.
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Extended data
Extended Data Fig. 1 Expansion of chicken fibroblasts in perfused bioreactor systems.
(a,b) Filtrate flux and Cell-specific perfusion rate (CSPR) in ATF and TFF experiments in lab-scale. (c) Comparison of cell densities obtained in hollow fibre (0.2 μm cut-off) experiments in ATF and TFF mode. (d) Filtrate flux in hollow fibres in ATF and TFF. (e) Glucose, lactate, glutamine and ammonium concentrations measured in hollow fibre experiments operated in ATF and TFF mode. (f) Shear rates through hollow fibres in ATF and TFF.
Extended Data Fig. 2 Development of animal-component-free culture medium for chicken fibroblasts.
(a) Schematic showing the selection of various culture medium compounds to replace albumin. (b) Cell density in ACF with various methylcellulose concentrations. Data are presented as means plus standard error of the mean (n=3). Error bars represent variation of biological repeats. (c) Cell density in ACF with various antioxidant solution concentrations. Data are presented as means plus standard error of the mean (n=3). Error bars represent variation of biological repeats. (d) Cell density in ACF with various 2-hydroxypropyl-β-cyclodextrin (HPBCD) concentrations. Data are presented as means plus standard error of the mean (n=3). Error bars represent variation of biological repeats. (e) Viable cell density, and glucose and lactate concentrations in finalized SFM and ACF compositions, respectively. Data are presented as means plus standard error of the mean of technical repeats (n=2). Panel a created with BioRender.com.
Extended Data Fig. 3 Development of a perfused chicken fibroblast culture with contiguous partial harvests.
(a) Multiple TFF experiments showing first ten days following inoculation in SFM and ACF, respectively. TFF circulation indicates the day on which the bioreactor suspension started circulating in the TFF loop. (b) TFF circulation rate is identical to the low-shear magnetic levitation pump output, describing the circulation speed in the TFF loop. (c) Shear rate as a result of TFF circulation rate does not exceed 2500 s−1 to prevent shear damage. (d) Contiguous harvest experiments in SFM. (e) Metabolite concentrations in contiguous harvest experiments in SFM. (f) Contiguous harvest experiments in ACF. (g) Metabolite concentrations in contiguous harvest experiments in ACF. (h) Summary of run parameters for contiguous harvest experiments in SFM and ACF. Average plus/minus standard error of the mean of two experiments in SFM, and three experiments in ACF, respectively. (i) Filtrate flux and Cell-specific perfusion rate (CSPR) in SFM and ACF experiments in lab-scale.
Extended Data Fig. 4 Characteristics of a chicken fibroblast culture with contiguous partial harvests.
(a) Relative daily uptake of amino acids measured in spent medium of samples taken daily from the TFF-bioreactor. (b) Cell diameter measured in samples taken from the TFF-bioreactor run daily for analysis on days 0 through 20. Data are presented as means plus/minus standard error of the mean of biological repeats (n=2).
Extended Data Fig. 5 Scalability of perfusion technologies.
(a,b) ATF and TFF system assembly in pilot-scale (300 l bioreactor vessel).
Supplementary information
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Source Data Extended Data Figs. 1–5
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Pasitka, L., Wissotsky, G., Ayyash, M. et al. Empirical economic analysis shows cost-effective continuous manufacturing of cultivated chicken using animal-free medium. Nat Food 5, 693–702 (2024). https://doi.org/10.1038/s43016-024-01022-w
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DOI: https://doi.org/10.1038/s43016-024-01022-w