Budget-friendly lab-grown steak with realistic texture cooked up
Peer-Reviewed Publicationimage:
the two first authors are examining different CNC concentrations while developing the exact method to prepare the CNC scaffolds. (2022)
view moreCredit: Sharon Schlesinger
A new study demonstrates that preloading plant-derived cellulose scaffolds with growth factors supports the cost-efficient proliferation and differentiation of bovine stem cells for cultivated meat. By binding these vital proteins directly to an anisotropic, directionally frozen framework instead of dispersing them in liquid media, this method achieves high-quality tissue development using up to ten times fewer expensive factors. Upon multi-week cultivation and subsequent pan-frying, the cell-bound constructs show partially similar mechanical and visual responses to traditional sirloin cuts
Link to photos: https://drive.google.com/drive/folders/16ZXniYC_3rUfr1nT-UQBgSm2Jbc3r2Yk?usp=drive_link
A team of Israeli scientists at the Hebrew University of Jerusalem has developed a novel method to significantly lower the production costs of cultivated meat. The study, co-authored by Alon Gershkoviz, Joseph Kippen and Yael Gilad, co-mentored by Prof. Oded Shoseyov and Dr. Sharon Schlesinger in collaboration with Prof. Ido Braslavaski from the Faculty of Agriculture, introduces a food-safe, cellulose-based scaffold that drastically reduces the volume of expensive growth factors required to cultivate animal cells into structured meat products like steaks.
The field of cultivated meat has long promised an eco-friendly and ethical alternative to conventional agriculture, yet the commercial viability of structured whole cuts has been limited by engineering challenges and prohibitive media expenses. Growth factors, which trigger cell multiplication and differentiation, typically account for over 95 percent of these media costs. By infusing these vital proteins directly into a specialized porous scaffold rather than continuously dissolving them throughout liquid culture media, the researchers successfully achieved comparable cell growth while using up to ten times less mass of these costly factors.
The foundational scaffold is fabricated using directional freezing techniques applied to combinations of nano and microcrystalline cellulose derivatives. This process creates highly aligned, tunnel-like microstructures that effectively mimic the natural extracellular matrix of animal muscle tissues. Bovine mesenchymal stem cells seeded onto these structured platforms demonstrated excellent adherence, long-term survival, and parallel spatial alignment as they grew along the parallel cellulose fibers.
Beyond merely hosting the stem cells, the anisotropic structure of the cellulose scaffold actively encourages the cells to transition toward muscle lineage. Over multi-week cultivation periods, the cells successfully differentiated and accumulated cytoplasmic lipids or structural muscle proteins like titin. Crucially, this biological maturation fundamentally altered the physical attributes of the constructs, increasing their stiffness and compressive strength to levels that closely approximate traditional raw sirloin cuts.
The culinary potential of the cell-laden scaffolds was further validated through standard cooking tests. When exposed to pan-frying at high temperatures, the structured constructs retained their dimensional stability and underwent characteristic browning reactions associated with the Maillard effect. Mechanical testing post-cooking revealed that the fried cultivated cuts exhibited a fibrous, tissue-like texture and a resistance to compression remarkably similar to conventional fried beef.
"Our findings demonstrate that we can radically change the economics of cellular agriculture without sacrificing tissue quality," said Dr. Sharon Schlesinger. "By pinning the growth factors directly to the scaffold, the cells get immediate access to the signals they need to thrive. This allows us to cut resource waste by an order of magnitude and brings us a substantial step closer to a scalable, commercially viable alternative to industrial meat production."
Prof. Oded Shoseyov added, "Utilizing plant-derived materials like cellulose allows us to build a highly structured, sustainable framework that naturally guides stem cells into replicating real meat architectures. Seeing the final product respond to frying with the same browning and structural density as a traditional steak confirms that this bio-engineering approach can deliver the authentic sensory experience consumers expect."
While the current findings serve as a robust proof of concept, the researchers note that future steps will involve transitioning the protocols to entirely serum-free formulations and scaling up production dynamics to meet commercial standards. Nevertheless, the blending of low-cost agricultural waste materials with innovative biochemistry marks a vital milestone for cellular agriculture in Israel and globally.
Journal
Current Research in Food Science
Method of Research
Experimental study
Subject of Research
Cells
Article Title
Growth factors-infused cellulose scaffolds support cost-efficient proliferation and differentiation of bovine stem cells for cultivated meat
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