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A serum-free media formulation for cultured meat production supports bovine satellite cell differentiation in the absence of serum starvation [Timecourse]

ABSTRACT: Production of cultured meat requires the robust differentiation of satellite cells into mature muscle fibers without the use of animal-derived components. Current protocols induce myogenic differentiation in vitro through serum starvation, an abrupt reduction in serum concentration. Here, we used RNA sequencing to investigate the transcriptomic remodelling of bovine satellite cells during myogenic differentiation induced by serum starvation. We characterized canonical myogenic gene expression, and identified surface receptors upregulated during the early phase of differentiation. Supplementation of ligands to these receptors enabled the formulation of a chemically defined media that induced differentiation in the absence of serum starvation and/or transgene expression. Serum-free myogenic differentiation was of similar extent to that induced by serum starvation, as evaluated by transcriptome analysis, protein expression and the presence of a functional contractile apparatus. Moreover, the serum-free differentiation media supported the fabrication of mature three-dimensional bioartificial muscle constructs, demonstrating its suitability for cultured beef production.

ORGANISM(S): Bos taurus

PROVIDER: GSE173198 | GEO | 2021/10/22

REPOSITORIES: GEO

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A serum-free media formulation for cultured meat production supports bovine satellite cell differentiation in the absence of serum starvation [SF_Diff]

Project description:Production of cultured meat requires the robust differentiation of satellite cells into mature muscle fibers without the use of animal-derived components. Current protocols induce myogenic differentiation in vitro through serum starvation, an abrupt reduction in serum concentration. Here, we used RNA sequencing to investigate the transcriptomic remodelling of bovine satellite cells during myogenic differentiation induced by serum starvation. We characterized canonical myogenic gene expression, and identified surface receptors upregulated during the early phase of differentiation. Supplementation of ligands to these receptors enabled the formulation of a chemically defined media that induced differentiation in the absence of serum starvation and/or transgene expression. Serum-free myogenic differentiation was of similar extent to that induced by serum starvation, as evaluated by transcriptome analysis, protein expression and the presence of a functional contractile apparatus. Moreover, the serum-free differentiation media supported the fabrication of mature three-dimensional bioartificial muscle constructs, demonstrating its suitability for cultured beef production.

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A serum-free media formulation for cultured meat production supports bovine satellite cell differentiation in the absence of serum starvation

Project description:A serum-free media formulation for cultured meat production supports bovine satellite cell differentiation in the absence of serum starvation

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A serum-free media formulation for cultured meat production supports bovine satellite cell differentiation in the absence of serum starvation [Timecourse]

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Project description:Traditional differentiation of myoblasts is usually induced by serum starvation method, in which 2%HS is used to induce myoblasts to differentiate into myotubes. But, traditional serum starvation method is difficult to differentiate large yellow croaker muscle satellite cells efficiently. Although myotubes were induced within 2-3 days with medium containing 2% horse serum (HS), they detached shortly and died soon after. To improve differentiation efficiency and survival rate, different combinations of basal medium, serum ratios and myogenic factors were evaluated. Finally, the F12 medium containing 8% HS, 10 ng/ml IGF-1, 50 nM necrosulfonamide and 200 μM ascorbic acid was identified as an effective recipe for myogenic differentiation. On day 3 of culture in this differentiation medium, elongated myotubes began to appear, and on day 6, striations similar to skeletal muscle were observed in some of myotubes. But it is still inefficient, the fusion index (the proportion of nuclei in multinucleated myotubes) was 6.39% on day 3 and 1.30% on day 6 (1.30%) .Therefore, we need to find a more efficient method to induce myogenic differentiation. We then performed gene expression profiling analysis using data obtained from RNA-seq of Large yellow croaker muscle satellite cells during differentiation at three time points(day0,day3,day6).

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Project description:Introduction: The changing composition of non-cell autonomous circulating factors in blood as humans age is believed to play a role in muscle mass and strength loss. The mechanisms through which these circulating factors act in age-related skeletal muscle changes is not fully understood. In this study, we used human myogenic progenitors derived from human pluripotent stem cells to study non-cell autonomous roles of circulating factors during the process of myogenic differentiation. Methods: Myogenic progenitors from human embryonic stem cells (ESCs) and induced pluripotent stem cells (iPSCs) were supplemented with serum samples from aged or young Fischer 344 × Brown Norway F1-hybrid rats. The effect of aged or young serum supplementation on myogenic progenitor proliferation, myotube formation capacity, differentiation, and early transcriptomic profiles were analyzed. Results: We found that aged rat serum supplementation significantly reduced cell proliferation and increased cell death in both ESC- and iPSC-derived myogenic progenitors. Next, we found that the supplementation of aged rat serum inhibited myotube formation and maturation during terminal differentiation from progenitors to skeletal myocytes when compared to the cells treated with young adult rat serum. Lastly, we identified that gene expression profiles were affected following serum supplementation in culture. Discussion: Together, aged serum supplementation caused cellular and transcriptomic changes in human myogenic progenitors. The current data from our in vitro model possibly simulate non-cell autonomous contributions of blood composition to age-related processes in human skeletal muscle.

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