US 12,454,679 B2
Non-decellularized plant leaf cultures for meat
Alex S. Rebello, Somerset, MA (US); Jordan Jones, Allston, MA (US); and Glenn Gaudette, Holden, MA (US)
Assigned to Worcester Polytechnic Institute, Worcester, MA (US)
Filed by Worcester Polytechnic Institute, Worcester, MA (US)
Filed on May 11, 2021, as Appl. No. 17/317,037.
Claims priority of provisional application 63/022,758, filed on May 11, 2020.
Prior Publication US 2021/0348129 A1, Nov. 11, 2021
Int. Cl. C12N 5/077 (2010.01); A23L 13/00 (2016.01); A23L 19/00 (2016.01); A23L 33/105 (2016.01)
CPC C12N 5/0659 (2013.01) [A23L 13/00 (2016.08); A23L 19/03 (2016.08); A23L 33/105 (2016.08); A23V 2002/00 (2013.01); C12N 2513/00 (2013.01); C12N 2533/90 (2013.01)] 11 Claims
 
1. A method for producing an in vitro meat, the method comprising:
preparing a non-decellularized plant leaf and incubating the leaf in a cell culture media to obtain a non-decellularized leaf scaffold formed from a spinach leaf;
sterilizing the non-decellularized leaf scaffold with ethanol and a saline rinse;
forming a population of muscle cells by:
extracting a bovine tissue sample;
incubating the sample in a digestion medium to form a tissue pellet;
suspending the pellet in a growth medium to form satellite cells; and
enriching the satellite cells by incubating in a carbon dioxide environment for removing unwanted cells to form a cell suspension including the population of muscle cells;
seeding the non-decellularized leaf scaffold with the population of muscle cells to obtain a leaf scaffold adhered population of muscle cells, seeding further comprising:
coating a cell culture plate with a hydrophobic polymer to obtain a polymer coated plate, the coating formed from polydimethylsiloxane (PDMS);
placing the non-decellularized leaf scaffold on the polymer coated plate;
laying a cloning well on the non-decellularized leaf scaffold;
depositing the population of muscle cells on the non-decellularized leaf scaffold within the cloning well, the hydrophobic polymer and the cloning well maintaining the population of muscle cells in communication with the non-decellularized leaf scaffold;
developing a muscle tissue layer on the leaf scaffold;
assembling a plurality of the muscle tissue layers on the non-decellularized leaf scaffold for exposing the muscle cells to the cell culture media on opposed sides of the muscle tissue layers, further including layering a first leaf scaffold adhered population of muscle cells on a second leaf scaffold for forming an adhered population of muscle cells in a layered three-dimensional support structure of non-decellularized leaf scaffolds;
removing non-adherent muscle cells from the non-decellularized leaf scaffold by washing the leaf scaffold with a buffer to obtain the leaf scaffold adhered population of muscle cells; and
growing the leaf scaffold adhered population of muscle cells in cell culture media for differentiating the leaf scaffold adhered population of muscle cells in a differentiation media, and for achieving an alignment of a kappa value of between 0.17 to 0.45 for myosatellite cells defining the population of muscle cells, thereby obtaining the in vitro meat.