scholarly journals Validation of exercise-response genes in skeletal muscle cells of Thoroughbred racing horses

2021 ◽  
Vol 34 (1) ◽  
pp. 134-142
Author(s):  
Doh Hoon Kim ◽  
Hyo Gun Lee ◽  
Nipin Sp ◽  
Dong Young Kang ◽  
Kyoung-Jin Jang ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Muscle Tissue ◽  
Gene Networks ◽  
Muscle Cells ◽  
Skeletal Muscle Tissue ◽  
High Throughput Analysis ◽  
Qrt Pcr ◽  
Upregulated Genes ◽  
Six Genes

Objective: To understand the athletic characteristics of Thoroughbreds, high-throughput analysis has been conducted using horse muscle tissue. However, an <i>in vitro</i> system has been lacking for studying and validating genes from in silico data. The aim of this study is to validate genes from differentially expressed genes (DEGs) of our previous RNA-sequencing data <i>in vitro</i>. Also, we investigated the effects of exercise-induced stress including heat, oxidative, hypoxic and cortisol stress on horse skeletal muscle derived cells with the top six upregulated genes of DEGs.Methods: Enriched pathway analysis was conducted using the Database for Annotation, Visualization, and Integrated Discovery (DAVID) tool with upregulated genes in horse skeletal muscle tissue after exercise. Among the candidates, the top six genes were analysed through geneMANIA to investigate gene networks. Muscle cells derived from neonatal horse skeletal tissue were maintained and subjected to exercise-related stressors. Transcriptional changes in the top six genes followed by stressors were investigated using quantitative reverse transcription-polymerase chain reaction (qRT-PCR).Results: The inflammation response pathway was the most commonly upregulated pathway after horse exercise. Under non-cytotoxic conditions of exercise-related stressors, the transcriptional response of the top six genes was different among types of stress. Oxidative stress yielded the most similar expression pattern to DEGs.Conclusion: Our results indicate that transcriptional change after horse exercise in skeletal muscle tissue strongly relates to stress response. The qRT-PCR results showed that stressors contribute differently to the transcriptional regulation. These results would be valuable information to understand horse exercise in the stress aspect.

scholarly journals Controllable assembly of skeletal muscle-like bundles through 3D bioprinting

2021 ◽  
Author(s):  
Tingting Fan ◽  
Shuo Wang ◽  
Zongmin Jiang ◽  
Shen Ji ◽  
Wenhua Cao ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
3D Printing ◽  
Muscle Tissue ◽  
Muscle Cells ◽  
Skeletal Muscle Tissue ◽  
Skeletal Muscle Cells ◽  
Muscle Fibres ◽  
Physical Factors

Abstract 3D printing is an effective technology for recreating skeletal muscle tissue in vitro. To achieve clinical skeletal muscle injury repair, relatively large volumes of highly aligned skeletal muscle cells are required; obtaining these is still a challenge. It is currently unclear how individual skeletal muscle cells and their neighbouring components co-ordinate to establish anisotropic architectures in highly homogeneous orientations. Here, we demonstrated a 3D printing strategy followed by sequential culture processes to engineer skeletal muscle tissue. The effects of confined printing on the skeletal muscle during maturation, which impacted the myotube alignment, myogenic gene expression, and mechanical forces, were observed. Our findings demonstrate the dynamic changes of skeletal muscle tissue during in vitro 3D construction and reveal the role of physical factors in the orientation and maturity of muscle fibres.

scholarly journals Recycled algae-based carbon materials as electroconductive 3D printed skeletal muscle tissue engineering scaffolds

2021 ◽  
Vol 32 (7) ◽  
Author(s):  
Selva Bilge ◽  
Emre Ergene ◽  
Ebru Talak ◽  
Seyda Gokyer ◽  
Yusuf Osman Donar ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Tissue Engineering ◽  
Electrical Stimulation ◽  
Muscle Tissue ◽  
Carbonaceous Material ◽  
Hydrothermal Carbonization ◽  
Skeletal Muscle Tissue ◽  
Myotube Formation ◽  
3D Printed

AbstractSkeletal muscle is an electrically and mechanically active tissue that contains highly oriented, densely packed myofibrils. The tissue has self-regeneration capacity upon injury, which is limited in the cases of volumetric muscle loss. Several regenerative therapies have been developed in order to enhance this capacity, as well as to structurally and mechanically support the defect site during regeneration. Among them, biomimetic approaches that recapitulate the native microenvironment of the tissue in terms of parallel-aligned structure and biophysical signals were shown to be effective. In this study, we have developed 3D printed aligned and electrically active scaffolds in which the electrical conductivity was provided by carbonaceous material (CM) derived from algae-based biomass. The synthesis of this conductive and functional CM consisted of eco-friendly synthesis procedure such as pre-carbonization and multi-walled carbon nanotube (MWCNT) catalysis. CM obtained from biomass via hydrothermal carbonization (CM-03) and its ash form (CM-03K) were doped within poly(ɛ-caprolactone) (PCL) matrix and 3D printed to form scaffolds with aligned fibers for structural biomimicry. Scaffolds were seeded with C2C12 mouse myoblasts and subjected to electrical stimulation during the in vitro culture. Enhanced myotube formation was observed in electroactive groups compared to their non-conductive counterparts and it was observed that myotube formation and myotube maturity were significantly increased for CM-03 group after electrical stimulation. The results have therefore showed that the CM obtained from macroalgae biomass is a promising novel source for the production of the electrically conductive scaffolds for skeletal muscle tissue engineering.

scholarly journals Ether-Oxygen Containing Electrospun Microfibrous and Sub-Microfibrous Scaffolds Based on Poly(butylene 1,4-cyclohexanedicarboxylate) for Skeletal Muscle Tissue Engineering

2018 ◽  
Vol 19 (10) ◽  
pp. 3212 ◽  
Author(s):  
Nora Bloise ◽  
Emanuele Berardi ◽  
Chiara Gualandi ◽  
Elisa Zaghi ◽  
Matteo Gigli ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Tissue Engineering ◽  
Muscle Tissue ◽  
Skeletal Muscle Tissue ◽  
Cell Alignment ◽  
Fibre Direction ◽  
Electrospun Scaffolds ◽  
Fibre Morphology

We report the study of novel biodegradable electrospun scaffolds from poly(butylene 1,4-cyclohexandicarboxylate-co-triethylene cyclohexanedicarboxylate) (P(BCE-co-TECE)) as support for in vitro and in vivo muscle tissue regeneration. We demonstrate that chemical composition, i.e., the amount of TECE co-units (constituted of polyethylene glycol-like moieties), and fibre morphology, i.e., aligned microfibrous or sub-microfibrous scaffolds, are crucial in determining the material biocompatibility. Indeed, the presence of ether linkages influences surface wettability, mechanical properties, hydrolytic degradation rate, and density of cell anchoring points of the studied materials. On the other hand, electrospun scaffolds improve cell adhesion, proliferation, and differentiation by favouring cell alignment along fibre direction (fibre morphology), also allowing for better cell infiltration and oxygen and nutrient diffusion (fibre size). Overall, C2C12 myogenic cells highly differentiated into mature myotubes when cultured on microfibres realised with the copolymer richest in TECE co-units (micro-P73 mat). Lastly, when transplanted in the tibialis anterior muscles of healthy, injured, or dystrophic mice, micro-P73 mat appeared highly vascularised, colonised by murine cells and perfectly integrated with host muscles, thus confirming the suitability of P(BCE-co-TECE) scaffolds as substrates for skeletal muscle tissue engineering.

Osteoprogenitor cells of mature human skeletal muscle tissue: an in vitro study

Bone ◽  
2001 ◽  
Vol 29 (4) ◽  
pp. 317-322 ◽  
Author(s):  
M.M Levy ◽  
C.J Joyner ◽  
A.S Virdi ◽  
A Reed ◽  
J.T Triffitt ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Muscle Tissue ◽  
Human Skeletal Muscle ◽  
In Vitro Study ◽  
Skeletal Muscle Tissue ◽  
Vitro Study ◽  
Osteoprogenitor Cells

scholarly journals A Cylindrical Molding Method for the Biofabrication of Plane-Shaped Skeletal Muscle Tissue

Micromachines ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1411
Author(s):  
Minghao Nie ◽  
Ai Shima ◽  
Kenta Fukushima ◽  
Yuya Morimoto ◽  
Shoji Takeuchi
Keyword(s):  
Skeletal Muscle ◽  
Muscle Tissue ◽  
Myogenic Differentiation ◽  
Skeletal Muscle Tissue ◽  
Differentiation Markers ◽  
Animal Products ◽  
Molding Method ◽  
Muscle Tissues ◽  
Central Pillar

Muscle tissues can be fabricated in vitro by culturing myoblast-populated hydrogels. To counter the shrinkage of the myoblast-populated hydrogels during culture, a pair of anchors are generally utilized to fix the two ends of the hydrogel. Here, we propose an alternative method to counter the shrinkage of the hydrogel and fabricate plane-shaped skeletal muscle tissues. The method forms myoblast-populated hydrogel in a cylindrical cavity with a central pillar, which can prevent tissue shrinkage along the circumferential direction. By eliminating the usages of the anchor pairs, our proposed method can produce plane-shaped skeletal muscle tissues with uniform width and thickness. In experiments, we demonstrate the fabrication of plane-shaped (length: ca. 10 mm, width: 5~15 mm) skeletal muscle tissue with submillimeter thickness. The tissues have uniform shapes and are populated with differentiated muscle cells stained positive for myogenic differentiation markers (i.e., myosin heavy chains). In addition, we show the assembly of subcentimeter-order tissue blocks by stacking the plane-shaped skeletal muscle tissues. The proposed method can be further optimized and scaled up to produce cultured animal products such as cultured meat.

Effect of flavonoids on protease activities in human skeletal muscle tissue in vitro

1999 ◽  
Vol 285 (1-2) ◽  
pp. 13-20 ◽  
Author(s):  
David Mantle ◽  
Gavin Falkous ◽  
Elaine K Perry
Keyword(s):  
Skeletal Muscle ◽  
Muscle Tissue ◽  
Human Skeletal Muscle ◽  
Skeletal Muscle Tissue
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