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Pasitka L, Cohen M, Ehrlich A, Gildor B, Reuveni E, Ayyash M, Wissotsky G, Herscovici A, Kaminker R, Niv A, Bitcover R, Dadia O, Rudik A, Voloschin A, Shimoni M, Cinnamon Y, Nahmias Y. Author Correction: Spontaneous immortalization of chicken fibroblasts generates stable, high-yield cell lines for serum-free production of cultured meat. Nat Food 2023; 4:124. [PMID: 37118585 DOI: 10.1038/s43016-023-00692-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
Affiliation(s)
- L Pasitka
- Grass Center for Bioengineering, Benin School of Computer Science and Engineering, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - M Cohen
- Grass Center for Bioengineering, Benin School of Computer Science and Engineering, The Hebrew University of Jerusalem, Jerusalem, Israel
- Department of Cell and Developmental Biology, Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - A Ehrlich
- Grass Center for Bioengineering, Benin School of Computer Science and Engineering, The Hebrew University of Jerusalem, Jerusalem, Israel
| | | | | | - M Ayyash
- Grass Center for Bioengineering, Benin School of Computer Science and Engineering, The Hebrew University of Jerusalem, Jerusalem, Israel
- Believer Meats, Rehovot, Israel
| | | | | | | | - A Niv
- Believer Meats, Rehovot, Israel
| | | | - O Dadia
- Believer Meats, Rehovot, Israel
| | - A Rudik
- Believer Meats, Rehovot, Israel
| | | | | | - Y Cinnamon
- Institute of Animal Science, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
| | - Y Nahmias
- Grass Center for Bioengineering, Benin School of Computer Science and Engineering, The Hebrew University of Jerusalem, Jerusalem, Israel.
- Department of Cell and Developmental Biology, Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel.
- Believer Meats, Rehovot, Israel.
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Pasitka L, Cohen M, Ehrlich A, Gildor B, Reuveni E, Ayyash M, Wissotsky G, Herscovici A, Kaminker R, Niv A, Bitcover R, Dadia O, Rudik A, Voloschin A, Shimoni M, Cinnamon Y, Nahmias Y. Spontaneous immortalization of chicken fibroblasts generates stable, high-yield cell lines for serum-free production of cultured meat. Nat Food 2023; 4:35-50. [PMID: 37118574 DOI: 10.1038/s43016-022-00658-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 11/03/2022] [Indexed: 04/30/2023]
Abstract
Cellular agriculture could meet growing demand for animal products, but yields are typically low and regulatory bodies restrict genetic modification for cultured meat production. Here we demonstrate the spontaneous immortalization and genetic stability of fibroblasts derived from several chicken breeds. Cell lines were adapted to grow as single-cell suspensions using serum-free culture medium, reaching densities of 108 × 106 cells per ml in continuous culture, corresponding to yields of 36% w/v. We show that lecithin activates peroxisome proliferator-activated receptor gamma (PPARγ), inducing adipogenesis in immortalized fibroblasts. Blending cultured adipocyte-like cells with extruded soy protein, formed chicken strips in which texture was supported by animal and plant proteins while aroma and flavour were driven by cultured animal fat. Visual and sensory analysis graded the product 4.5/5.0, with 85% of participants extremely likely to replace their food choice with this cultured meat product. Immortalization without genetic modification and high-yield manufacturing are critical for the market realization of cultured meat.
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Affiliation(s)
- L Pasitka
- Grass Center for Bioengineering, Benin School of Computer Science and Engineering, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - M Cohen
- Grass Center for Bioengineering, Benin School of Computer Science and Engineering, The Hebrew University of Jerusalem, Jerusalem, Israel
- Department of Cell and Developmental Biology, Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - A Ehrlich
- Grass Center for Bioengineering, Benin School of Computer Science and Engineering, The Hebrew University of Jerusalem, Jerusalem, Israel
| | | | | | - M Ayyash
- Grass Center for Bioengineering, Benin School of Computer Science and Engineering, The Hebrew University of Jerusalem, Jerusalem, Israel
- Believer Meats, Rehovot, Israel
| | | | | | | | - A Niv
- Believer Meats, Rehovot, Israel
| | | | - O Dadia
- Believer Meats, Rehovot, Israel
| | - A Rudik
- Believer Meats, Rehovot, Israel
| | | | | | - Y Cinnamon
- Institute of Animal Science, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
| | - Y Nahmias
- Grass Center for Bioengineering, Benin School of Computer Science and Engineering, The Hebrew University of Jerusalem, Jerusalem, Israel.
- Department of Cell and Developmental Biology, Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel.
- Believer Meats, Rehovot, Israel.
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Nahmad A, Reuveni E, Goldschmidt E, Tenne T, Liberman M, Horovitz-Fried M, Khosravi R, Kobo H, Reinstein E, Madi A, Ben-David U, Barzel A. Frequent aneuploidy in primary human T cells after CRISPR-Cas9 cleavage. Nat Biotechnol 2022; 40:1807-1813. [PMID: 35773341 PMCID: PMC7613940 DOI: 10.1038/s41587-022-01377-0] [Citation(s) in RCA: 56] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 05/31/2022] [Indexed: 01/14/2023]
Abstract
Multiple clinical trials of allogeneic T cell therapy use site-specific nucleases to disrupt T cell receptor (TCR) and other genes1-6. In this study, using single-cell RNA sequencing, we investigated genome editing outcomes in primary human T cells transfected with CRISPR-Cas9 and guide RNAs targeting genes for TCR chains and programmed cell death protein 1. Four days after transfection, we found a loss of chromosome 14, harboring the TCRα locus, in up to 9% of the cells and a chromosome 14 gain in up to 1.4% of the cells. Chromosome 7, harboring the TCRβ locus, was truncated in 9.9% of the cells. Aberrations were validated using fluorescence in situ hybridization and digital droplet PCR. Aneuploidy was associated with reduced proliferation, induced p53 activation and cell death. However, at 11 days after transfection, 0.9% of T cells still had a chromosome 14 loss. Aneuploidy and chromosomal truncations are, thus, frequent outcomes of CRISPR-Cas9 cleavage that should be monitored and minimized in clinical protocols.
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Affiliation(s)
- A.D. Nahmad
- The School of Neurobiology, Biochemistry and Biophysics, Faculty of Life Sciences, Tel Aviv University, Tel Aviv, Israel,The Varda and Boaz Dotan Center for Advanced Therapies, Tel Aviv Sourasky Medical Center and Tel Aviv University, Tel Aviv
| | - E. Reuveni
- Department of Human Molecular Genetics & Biochemistry, Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - E. Goldschmidt
- Department of Pathology, Faculty of Medicine, Tel Aviv University, Israel
| | - T. Tenne
- Medical Genetics Institute, Meir Medical Center, Kfar-Saba, Israel
| | - M. Liberman
- Medical Genetics Institute, Meir Medical Center, Kfar-Saba, Israel
| | - M. Horovitz-Fried
- The School of Neurobiology, Biochemistry and Biophysics, Faculty of Life Sciences, Tel Aviv University, Tel Aviv, Israel,The Varda and Boaz Dotan Center for Advanced Therapies, Tel Aviv Sourasky Medical Center and Tel Aviv University, Tel Aviv
| | - R. Khosravi
- Single-Cell Genomics Core, Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - H. Kobo
- Genomics Research Unit, Faculty of Life Sciences, Tel Aviv University, Tel Aviv, Israel
| | - E. Reinstein
- Medical Genetics Institute, Meir Medical Center, Kfar-Saba, Israel,Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - A. Madi
- Department of Pathology, Faculty of Medicine, Tel Aviv University, Israel
| | - U. Ben-David
- Department of Human Molecular Genetics & Biochemistry, Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - A. Barzel
- The School of Neurobiology, Biochemistry and Biophysics, Faculty of Life Sciences, Tel Aviv University, Tel Aviv, Israel,The Varda and Boaz Dotan Center for Advanced Therapies, Tel Aviv Sourasky Medical Center and Tel Aviv University, Tel Aviv
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Nardone S, Sharan Sams D, Reuveni E, Getselter D, Oron O, Karpuj M, Elliott E. DNA methylation analysis of the autistic brain reveals multiple dysregulated biological pathways. Transl Psychiatry 2014; 4:e433. [PMID: 25180572 PMCID: PMC4203003 DOI: 10.1038/tp.2014.70] [Citation(s) in RCA: 169] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Revised: 06/09/2014] [Accepted: 07/01/2014] [Indexed: 02/07/2023] Open
Abstract
Autism spectrum disorders (ASD) are a group of neurodevelopmental conditions characterized by dysfunction in social interaction, communication and stereotypic behavior. Genetic and environmental factors have been implicated in the development of ASD, but the molecular mechanisms underlying their interaction are not clear. Epigenetic modifications have been suggested as molecular mechanism that can mediate the interaction between the environment and the genome to produce adaptive or maladaptive behaviors. Here, using the Illumina 450 K methylation array we have determined the existence of many dysregulated CpGs in two cortical regions, Brodmann area 10 (BA10) and Brodmann area 24 (BA24), of individuals who had ASD. In BA10 we found a very significant enrichment for genomic areas responsible for immune functions among the hypomethylated CpGs, whereas genes related to synaptic membrane were enriched among hypermethylated CpGs. By comparing our methylome data with previously published transcriptome data, and by performing real-time PCR on selected genes that were dysregulated in our study, we show that hypomethylated genes are often overexpressed, and that there is an inverse correlation between gene expression and DNA methylation within the individuals. Among these genes there were C1Q, C3, ITGB2 (C3R), TNF-α, IRF8 and SPI1, which have recently been implicated in synaptic pruning and microglial cell specification. Finally, we determined the epigenetic dysregulation of the gene HDAC4, and we confirm that the locus encompassing C11orf21/TSPAN32 has multiple hypomethylated CpGs in the autistic brain, as previously demonstrated. Our data suggest a possible role for epigenetic processes in the etiology of ASD.
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Affiliation(s)
- S Nardone
- Faculty of Medicine, Bar Ilan University, Safed, Israel
| | - D Sharan Sams
- Faculty of Medicine, Bar Ilan University, Safed, Israel
| | - E Reuveni
- Faculty of Medicine, Bar Ilan University, Safed, Israel
| | - D Getselter
- Faculty of Medicine, Bar Ilan University, Safed, Israel
| | - O Oron
- Faculty of Medicine, Bar Ilan University, Safed, Israel
| | - M Karpuj
- Faculty of Medicine, Bar Ilan University, Safed, Israel
| | - E Elliott
- Faculty of Medicine, Bar Ilan University, Safed, Israel,Faculty of Medicine, Bar Ilan University, Hanrietta Sold 8, Safed 13215, Israel. E-mail: or
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