A Transcriptomic Regulatory Network among miRNAs, lncRNAs, circRNAs, and mRNAs Associated with L-leucine-induced Proliferation of Equine Satellite Cells.
Abstract: In response to muscle injury, muscle stem cells are stimulated by environmental signals to integrate into damaged tissue to mediate regeneration. L-leucine (L-leu), a branched-chain amino acid (BCAA) that belongs to the essential amino acids (AAs) of the animal, has gained global interest on account of its muscle-building and regenerating effects. The present study was designed to investigate the impact of L-leu exposure to promote the proliferation of equine skeletal muscle satellite cells (SCs) on the regulation of RNA networks, including mRNA, long non-coding RNA (lncRNA), covalently closed circular RNA (circRNA), and microRNA (miRNA) in skeletal muscles. Equine SCs were used as a cell model and cultured in different concentrations of L-leu medium. The cell proliferation assay found that the optimal concentration of L-leu was 2 mM, so we selected cells cultured with L-leu concentrations of 0 mM and 2 mM for whole-transcriptiome sequencing, respectively. By high-throughput sequencing analysis, 2470 differentially expressed mRNAs (dif-mRNAs), 363 differentially expressed lncRNAs (dif-lncRNAs), 634 differentially expressed circRNAs (dif-circRNAs), and 49 differentially expressed miRNAs (dif-miRNAs) were significantly altered in equine SCs treated with L-leu. To identify the function of autoimmunity and anti-inflammatory responses after L-leu exposure, enrichment analysis was conducted on those differentially expressed genes (DEGs) related to lncRNA, circRNA, and miRNA. The hub genes were selected from PPI Network, including ACACB, HMGCR, IDI1, HAO1, SHMT2, PSPH, PSAT1, ASS1, PHGDH, MTHFD2, and DPYD, and were further identified as candidate biomarkers to regulate the L-leu-induced proliferation of equine SCs. The up-regulated novel 699_star, down-regulated novel 170_star, and novel 360_mature were significantly involved in the competing endogenous RNA (ceRNA) complex network. The hub genes involved in cell metabolism and dif-miRNAs may play fundamental roles in the L-leu-induced proliferation of equine SCs. Our findings suggested that the potential network regulation of miRNAs, circ-RNAs, lncRNAs, and mRNAs plays an important role in the proliferation of equine SCs, so as to build up new perspectives on improving equine performance and treatment strategies for the muscle injuries of horses.
Publication Date: 2023-01-06 PubMed ID: 36670748PubMed Central: PMC9854542DOI: 10.3390/ani13020208Google Scholar: Lookup
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Summary
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The research paper discusses an investigation into the impact of L-leucine, an essential amino acid notable for its muscle-building properties, on the RNA networks that regulate the proliferation of equine skeletal muscle satellite cells. The RNA networks studied include mRNA, long non-coding RNA, circular RNA, and microRNA. The study’s results suggest that these RNA networks play a significant role in promoting satellite cell growth, which can influence muscle regeneration properties and potentially improve horse performance and injury recovery.
Methodology of the Study
- The researchers used equine satellite cells as a cell model and cultured them in different concentrations of an L-leucine medium.
- They discovered the optimal concentration of L-leucine to promote cell proliferation was 2 mM.
- Cells cultured with L-leucine concentrations of 0 mM and 2 mM were selected for whole-transcriptiome sequencing.
- Through high-throughput sequencing analysis, the researchers identified changes in the expression of several types of RNA in equine satellite cells treated with L-leucine.
Differential Gene Expression
- Significant alterations were found in 2470 differentially expressed mRNAs, 363 differentially expressed lncRNAs, 634 differentially expressed circRNAs, and 49 differentially expressed miRNAs in response to L-leucine treatment.
- Following this, the researchers conducted an enrichment analysis on these differentially expressed genes to identify their function in anti-inflammatory responses and autoimmunity following L-leucine exposure.
- Several hub genes were identified, including ACACB, HMGCR, IDI1, HAO1, SHMT2, PSPH, PSAT1, ASS1, PHGDH, MTHFD2, and DPYD. These were proposed as candidate biomarkers to regulate the L-leucine-induced proliferation of equine satellite cells.
Proposed Network Regulation
- The RNA networks studied—miRNAs, circ-RNAs, lncRNAs, and mRNAs—are believed to play a significant role in regulating L-leucine’s ability to stimulate the growth of equine satellite cells.
- Three genes—up-regulated novel 699_star, down-regulated novel 170_star, and novel 360_mature—were found to be significantly involved in the competing endogenous RNA network, which may drive the observed cell proliferation.
- This study hints at the importance of RNA network regulation in optimizing muscle regeneration and performance enhancement strategies in horses.
Cite This Article
APA
Xing J, Qi X, Liu G, Li X, Gao X, Bou G, Bai D, Zhao Y, Du M, Dugarjaviin M, Zhang X.
(2023).
A Transcriptomic Regulatory Network among miRNAs, lncRNAs, circRNAs, and mRNAs Associated with L-leucine-induced Proliferation of Equine Satellite Cells.
Animals (Basel), 13(2).
https://doi.org/10.3390/ani13020208 Publication
Researcher Affiliations
- Inner Mongolia Key Laboratory of Equine Genetics, Breeding and Reproduction, Scientific Observing and Experimental Station of Equine Genetics, Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Equine Research Center, College of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, China.
- Liaocheng Research Institute of Donkey High-Breeding and Ecological Feeding, College of Agronomy, Liaocheng University, Liaocheng 252000, China.
- Liaocheng Research Institute of Donkey High-Breeding and Ecological Feeding, College of Agronomy, Liaocheng University, Liaocheng 252000, China.
- Inner Mongolia Key Laboratory of Equine Genetics, Breeding and Reproduction, Scientific Observing and Experimental Station of Equine Genetics, Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Equine Research Center, College of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, China.
- Inner Mongolia Key Laboratory of Equine Genetics, Breeding and Reproduction, Scientific Observing and Experimental Station of Equine Genetics, Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Equine Research Center, College of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, China.
- Inner Mongolia Key Laboratory of Equine Genetics, Breeding and Reproduction, Scientific Observing and Experimental Station of Equine Genetics, Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Equine Research Center, College of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, China.
- Inner Mongolia Key Laboratory of Equine Genetics, Breeding and Reproduction, Scientific Observing and Experimental Station of Equine Genetics, Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Equine Research Center, College of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, China.
- Inner Mongolia Key Laboratory of Equine Genetics, Breeding and Reproduction, Scientific Observing and Experimental Station of Equine Genetics, Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Equine Research Center, College of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, China.
- Inner Mongolia Key Laboratory of Equine Genetics, Breeding and Reproduction, Scientific Observing and Experimental Station of Equine Genetics, Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Equine Research Center, College of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, China.
- Inner Mongolia Key Laboratory of Equine Genetics, Breeding and Reproduction, Scientific Observing and Experimental Station of Equine Genetics, Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Equine Research Center, College of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, China.
- Inner Mongolia Key Laboratory of Equine Genetics, Breeding and Reproduction, Scientific Observing and Experimental Station of Equine Genetics, Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Equine Research Center, College of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, China.
Grant Funding
- 31902188 / National Natural Science Foundation of China
- 3191101008 / National Natural Science Foundation of China
- 31960657 / National Natural Science Foundation of China
- 2021MS03016 / Natural Science Foundation of Inner Mongolia
- NDGCC2016-01 / the startup project for High-level Talents of Inner Mongolia Agricultural University
- QN202114 / Youth Foundation of College of Animal Science, Inner Mongolia Agricultural University
- DC2100002428 / Postgraduate Research Innovation Funding Project
- RZ2200001172 / Basic scientific research projects in colleges and universities
- SDAIT-27 / Donkey innovation team of Shandong modern agricultural industry technology system
- 2021TZXD012 / Rural Revitalization science and technology innovation promotion action plan project of Shandong
- 318052120 / Doctoral Research Project of Liaocheng University
- 319312101-03 / Open Project of Animal Science of Liaocheng University
Conflict of Interest Statement
The authors declare no conflict of interest.
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