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Ye M, Marzullo B, Adler HJ, Hu BH. Expression profiling of cochlear genes uncovers sex-based cellular function in mouse cochleae. Hear Res 2024; 448:109030. [PMID: 38776705 DOI: 10.1016/j.heares.2024.109030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Revised: 04/13/2024] [Accepted: 05/13/2024] [Indexed: 05/25/2024]
Abstract
Sex is a pivotal biological factor that significantly impacts tissue homeostasis and disease susceptibility. In the auditory system, sex differences have been observed in cochlear physiology and responses to pathological conditions. However, the underlying molecular mechanisms responsible for these differences remain elusive. The current research explores the differences in gene expression profiles in the cochlea between male and female mice, aiming to understand the functional implication of sex-biased gene expression in each sex. Using RNA-sequencing analysis on cochlear tissues obtained from male and female mice, we identified a significant number of genes exhibiting sex-biased expression differences. While some of these differentially expressed genes are located on sex chromosomes, most are found on autosomal chromosomes. Further bioinformatic analysis revealed that these genes are involved in several key cellular functions. In males, these genes are notably linked to oxidative phosphorylation and RNA synthesis and processing, suggesting their involvement in mitochondrial energy production and regulatory control of gene expression. In contrast, sex-biased genes are associated with mechano-transduction and synaptic transmission within female cochleae. Collectively, our study provides valuable insights into the molecular differences between the sexes and emphasizes the need for future research to uncover their functional implications and relevance to auditory health and disease development.
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Affiliation(s)
- Mengxiao Ye
- The Department of Communicative Disorders and Sciences, University at Buffalo, 137 Cary Hall, 3435 Main Street, Buffalo, NY 14214, USA
| | - Brandon Marzullo
- UB Genomics and Bioinformatics Core NYS Center of Excellence in Bioinformatics & Life Sciences, University at Buffalo, 701 Ellicott Street, Buffalo, NY 14222, USA
| | - Henry J Adler
- The Department of Communicative Disorders and Sciences, University at Buffalo, 137 Cary Hall, 3435 Main Street, Buffalo, NY 14214, USA
| | - Bo Hua Hu
- The Department of Communicative Disorders and Sciences, University at Buffalo, 137 Cary Hall, 3435 Main Street, Buffalo, NY 14214, USA.
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Arner P, Viguerie N, Massier L, Rydén M, Astrup A, Blaak E, Langin D, Andersson DP. Sex differences in adipose insulin resistance are linked to obesity, lipolysis and insulin receptor substrate 1. Int J Obes (Lond) 2024:10.1038/s41366-024-01501-x. [PMID: 38491191 DOI: 10.1038/s41366-024-01501-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Revised: 02/12/2024] [Accepted: 02/15/2024] [Indexed: 03/18/2024]
Abstract
BACKGROUND/OBJECTIVE Insulin resistance is more prominent in men than women. If this involves adipose tissue is unknown and was presently examined. SUBJECTS/METHODS AdipoIR (in vivo adipose insulin resistance index) was measured in 2344 women and 787 men. In 259 of the women and 54 of the men, insulin induced inhibition of lipolysis (acylglycerol breakdown) and stimulation of lipogenesis (glucose conversion to acylglycerols) were determined in subcutaneous adipocytes; in addition, basal (spontaneous) lipolysis was also determined in the fat cells. In 234 women and 115 men, RNAseq expression of canonical insulin signal genes were measured in subcutaneous adipose tissue. Messenger RNA transcripts of the most discriminant genes were quantified in 175 women and 109 men. RESULTS Men had higher AdipoIR values than women but only when obesity (body mass index 30 kg/m2 or more) was present (p < 0.0001). The latter sex dimorphism was found among physically active and sedentary people, in those with and without cardiometabolic disease and in people using nicotine or not (p = 0.0003 or less). In obesity, adipocyte insulin sensitivity (half maximum effective hormone concentration) and maximal antilipolytic effect were tenfold and 10% lower, respectively, in men than women (p = 0.005 or less). Basal rate of lipolysis was two times higher in men than women (p > 0.0001). Sensitivity and maximum effect of insulin on lipogenesis were similar in both sexes (p = 0.26 and p = 0.18, respectively). When corrected for multiple comparison only RNAseq expression of insulin receptor substrate 1 (IRS1) was lower in men than women (p < 0.0001). The mRNA transcript for IRS1 was 60% higher in women than men (p < 0.0001). CONCLUSIONS In obesity, adipose tissue insulin resistance is more pronounced in men than in women. The mechanism involves less efficient insulin-mediated inhibition of adipocyte lipolysis, increased basal rate of lipolysis and decreased adipose expression of a key element of insulin signaling, IRS1.
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Affiliation(s)
- Peter Arner
- Department of Medicine H7, Karolinska Institutet, Stockholm, Sweden.
| | - Nathalie Viguerie
- Institute of Metabolic and Cardiovascular Diseases, I2MC, University of Toulouse, Inserm, Toulouse III University - Paul Sabatier (UPS), Toulouse, France
| | - Lucas Massier
- Department of Medicine H7, Karolinska Institutet, Stockholm, Sweden
| | - Mikael Rydén
- Department of Medicine H7, Karolinska Institutet, Stockholm, Sweden
- Department of Endocrinology and Metabolism, Karolinska University Hospital, Stockholm, Sweden
| | - Arne Astrup
- Department of Obesity and Nutritional Sciences, Novo Nordisk Foundation, 2900, Hellerup, Denmark
| | - Ellen Blaak
- Department of Human Biology, NUTRIM, School of Nutrition and Translational Research in Metabolism, Faculty of Health, Medicine and Life Science, Maastricht University, 6200, MD, Maastricht, The Netherlands
| | - Dominique Langin
- Institute of Metabolic and Cardiovascular Diseases, I2MC, University of Toulouse, Inserm, Toulouse III University - Paul Sabatier (UPS), Toulouse, France
- Centre Hospitalier Universitaire de Toulouse, Toulouse, France
- Institut Universitaire de France (IUF), Paris, France
| | - Daniel Peter Andersson
- Department of Medicine H7, Karolinska Institutet, Stockholm, Sweden
- Department of Endocrinology and Metabolism, Karolinska University Hospital, Stockholm, Sweden
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Meadows AM, Han K, Singh K, Murgia A, McNally BD, West JA, Huffstutler RD, Powell-Wiley TM, Baumer Y, Griffin JL, Sack MN. N-arachidonylglycine is a caloric state-dependent circulating metabolite which regulates human CD4 +T cell responsiveness. iScience 2023; 26:106578. [PMID: 37128607 PMCID: PMC10148119 DOI: 10.1016/j.isci.2023.106578] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 01/29/2023] [Accepted: 03/29/2023] [Indexed: 05/03/2023] Open
Abstract
Caloric deprivation interventions such as intermittent fasting and caloric restriction ameliorate metabolic and inflammatory disease. As a human model of caloric deprivation, a 24-h fast blunts innate and adaptive immune cell responsiveness relative to the refed state. Isolated serum at these time points confers these same immunomodulatory effects on transformed cell lines. To identify serum mediators orchestrating this, metabolomic and lipidomic analysis was performed on serum extracted after a 24-h fast and re-feeding. Bioinformatic integration with concurrent peripheral blood mononuclear cells RNA-seq analysis implicated key metabolite-sensing GPCRs in fasting-mediated immunomodulation. The putative GPR18 ligand N-arachidonylglycine (NAGly) was elevated during fasting and attenuated CD4+T cell responsiveness via GPR18 MTORC1 signaling. In parallel, NAGly reduced inflammatory Th1 and Th17 cytokines levels in CD4+T cells isolated from obese subjects, identifying a fasting-responsive metabolic intermediate that may contribute to the regulation of nutrient-level dependent inflammation associated with metabolic disease.
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Affiliation(s)
- Allison M. Meadows
- Laboratory of Mitochondrial Biology and Metabolism, NHLBI, NIH, Bethesda, MD, USA
- Department of Biochemistry and Cambridge Systems Biology Centre, University of Cambridge, Cambridge, UK
| | - Kim Han
- Laboratory of Mitochondrial Biology and Metabolism, NHLBI, NIH, Bethesda, MD, USA
| | - Komudi Singh
- Laboratory of Mitochondrial Biology and Metabolism, NHLBI, NIH, Bethesda, MD, USA
| | - Antonio Murgia
- Department of Biochemistry and Cambridge Systems Biology Centre, University of Cambridge, Cambridge, UK
| | - Ben D. McNally
- Department of Biochemistry and Cambridge Systems Biology Centre, University of Cambridge, Cambridge, UK
| | - James A. West
- Department of Biochemistry and Cambridge Systems Biology Centre, University of Cambridge, Cambridge, UK
| | | | - Tiffany M. Powell-Wiley
- Social Determinants of Obesity and Cardiovascular Risk Laboratory, NHLBI, NIH, Bethesda, MD, USA
| | - Yvonne Baumer
- Social Determinants of Obesity and Cardiovascular Risk Laboratory, NHLBI, NIH, Bethesda, MD, USA
| | - Julian L. Griffin
- Department of Biochemistry and Cambridge Systems Biology Centre, University of Cambridge, Cambridge, UK
- The Rowett Institute, School of Medicine, Medical Sciences and Nutrition, Foresterhill Campus, Aberdeen, UK
| | - Michael N. Sack
- Laboratory of Mitochondrial Biology and Metabolism, NHLBI, NIH, Bethesda, MD, USA
- Cardiovascular Branch, NHLBI, NIH, Bethesda, MD, USA
- Corresponding author
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Xie S, Choudhari S, Wu CL, Abramson K, Corcoran D, Gregory SG, Thimmapuram J, Guilak F, Little D. Aging and obesity prime the methylome and transcriptome of adipose stem cells for disease and dysfunction. FASEB J 2023; 37:e22785. [PMID: 36794668 PMCID: PMC10561192 DOI: 10.1096/fj.202201413r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 12/20/2022] [Accepted: 01/09/2023] [Indexed: 02/17/2023]
Abstract
The epigenome of stem cells occupies a critical interface between genes and environment, serving to regulate expression through modification by intrinsic and extrinsic factors. We hypothesized that aging and obesity, which represent major risk factors for a variety of diseases, synergistically modify the epigenome of adult adipose stem cells (ASCs). Using integrated RNA- and targeted bisulfite-sequencing in murine ASCs from lean and obese mice at 5- and 12-months of age, we identified global DNA hypomethylation with either aging or obesity, and a synergistic effect of aging combined with obesity. The transcriptome of ASCs in lean mice was relatively stable to the effects of age, but this was not true in obese mice. Functional pathway analyses identified a subset of genes with critical roles in progenitors and in diseases of obesity and aging. Specifically, Mapt, Nr3c2, App, and Ctnnb1 emerged as potential hypomethylated upstream regulators in both aging and obesity (AL vs. YL and AO vs. YO), and App, Ctnnb1, Hipk2, Id2, and Tp53 exhibited additional effects of aging in obese animals. Furthermore, Foxo3 and Ccnd1 were potential hypermethylated upstream regulators of healthy aging (AL vs. YL), and of the effects of obesity in young animals (YO vs. YL), suggesting that these factors could play a role in accelerated aging with obesity. Finally, we identified candidate driver genes that appeared recurrently in all analyses and comparisons undertaken. Further mechanistic studies are needed to validate the roles of these genes capable of priming ASCs for dysfunction in aging- and obesity-associated pathologies.
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Affiliation(s)
- Shaojun Xie
- Bioinformatics Core, Purdue University, 1022 Young Hall, 155 S. Grant Street, West Lafayette, IN 47907
| | - Sulbha Choudhari
- Bioinformatics Core, Purdue University, 1022 Young Hall, 155 S. Grant Street, West Lafayette, IN 47907
- Advanced Biomedical Computational Science, Bioinformatics and Computational Science, Frederick National Laboratory for Cancer Research, 8560 Progress Drive, Frederick, MD 2170
| | - Chia-Lung Wu
- Department of Orthopaedics and Rehabilitation, Center for Musculoskeletal Research, University of Rochester, Rochester, NY, 14611
| | - Karen Abramson
- Duke Molecular Physiology Institute, 300 North Duke Street, Durham, NC 27701
| | - David Corcoran
- Genomic Analysis and Bioinformatics Shared Resource, Duke Center for Genomic and Computational Biology, 101 Science Drive, Duke University Medical Center Box 3382, Durham, NC 27708
- Lineberger Bioinformatics Core, 5200 Marsico Hall, University of North Carolina-Chapel Hill, Chapel Hill, NC 27516
| | - Simon G. Gregory
- Duke Molecular Physiology Institute, 300 North Duke Street, Durham, NC 27701
- Department of Neurology, Duke University School of Medicine, 311 Research Drive, Durham, NC 27710
| | - Jyothi Thimmapuram
- Bioinformatics Core, Purdue University, 1022 Young Hall, 155 S. Grant Street, West Lafayette, IN 47907
| | - Farshid Guilak
- Department of Orthopaedic Surgery, Washington University in St. Louis, 4515 McKinley Ave., St. Louis, MO 63110
- Shriners Hospitals for Children – St. Louis, 4400 Clayton Ave, St. Louis Missouri 63110
| | - Dianne Little
- Departments of Basic Medical Sciences and Biomedical Engineering, Purdue University, 2186 Lynn Hall, 625 Harrison St, West Lafayette, IN 47907-2026
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Fonseca PAS, Alonso-García M, Pelayo R, Marina H, Esteban-Blanco C, Mateo J, Gutiérrez-Gil B, Arranz JJ, Suárez-Vega A. Integrated analyses of the methylome and transcriptome to unravel sex differences in the perirenal fat from suckling lambs. Front Genet 2022; 13:1035063. [PMID: 36386829 PMCID: PMC9663842 DOI: 10.3389/fgene.2022.1035063] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 10/18/2022] [Indexed: 11/25/2022] Open
Abstract
In sheep, differences were observed regarding fat accumulation and fatty acid (FA) composition between males and females, which may impact the quality and organoleptic characteristics of the meat. The integration of different omics technologies is a relevant approach for investigating biological and genetic mechanisms associated with complex traits. Here, the perirenal tissue of six male and six female Assaf suckling lambs was evaluated using RNA sequencing and whole-genome bisulfite sequencing (WGBS). A multiomic discriminant analysis using multiblock (s)PLS-DA allowed the identification of 314 genes and 627 differentially methylated regions (within these genes), which perfectly discriminate between males and females. These candidate genes overlapped with previously reported QTLs for carcass fat volume and percentage of different FAs in milk and meat from sheep. Additionally, differentially coexpressed (DcoExp) modules of genes between males (nine) and females (three) were identified that harbour 22 of these selected genes. Interestingly, these DcoExp were significantly correlated with fat percentage in different deposits (renal, pelvic, subcutaneous and intramuscular) and were associated with relevant biological processes for adipogenesis, adipocyte differentiation, fat volume and FA composition. Consequently, these genes may potentially impact adiposity and meat quality traits in a sex-specific manner, such as juiciness, tenderness and flavour.
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Affiliation(s)
- Pablo A. S. Fonseca
- Departamento de Producción Animal, Facultad de Veterinaria, Universidad de León, León, Spain
| | - María Alonso-García
- Departamento de Producción Animal, Facultad de Veterinaria, Universidad de León, León, Spain
| | - Rocio Pelayo
- Departamento de Producción Animal, Facultad de Veterinaria, Universidad de León, León, Spain
| | - Hector Marina
- Departamento de Producción Animal, Facultad de Veterinaria, Universidad de León, León, Spain
| | - Cristina Esteban-Blanco
- Departamento de Producción Animal, Facultad de Veterinaria, Universidad de León, León, Spain
| | - Javier Mateo
- Departamento de Higiene y Tecnología de Los Alimentos, Facultad de Veterinaria, Universidad de León, León, Spain
| | - Beatriz Gutiérrez-Gil
- Departamento de Producción Animal, Facultad de Veterinaria, Universidad de León, León, Spain
| | - Juan-José Arranz
- Departamento de Producción Animal, Facultad de Veterinaria, Universidad de León, León, Spain,*Correspondence: Juan-José Arranz,
| | - Aroa Suárez-Vega
- Departamento de Producción Animal, Facultad de Veterinaria, Universidad de León, León, Spain
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Differences in Adipose Gene Expression Profiles between Male and Female Even Reindeer (Rangifer tarandus) in Sakha (Yakutia). Genes (Basel) 2022; 13:genes13091645. [PMID: 36140812 PMCID: PMC9498357 DOI: 10.3390/genes13091645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 09/06/2022] [Accepted: 09/12/2022] [Indexed: 11/17/2022] Open
Abstract
Reindeer are native to harsh northern Eurasian environments which are characterized by long and cold winters, short summers, and limited pasture vegetation. Adipose tissues play a significant role in these animals by modulating energy metabolism, immunity, and reproduction. Here, we have investigated the transcriptome profiles of metacarpal, perirenal, and prescapular adipose tissues in Even reindeer and searched for genes that were differentially expressed in male and female individuals. A total of 15,551 genes were expressed, where the transcriptome profile of metacarpal adipose tissue was found to be distinct from that of perirenal and prescapular adipose tissues. Interestingly, 10 genes, including PRDM9, which is known to have an important role in adaptation and speciation in reindeer, were always upregulated in all three tissues of male reindeer.
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Rey F, Messa L, Pandini C, Barzaghini B, Micheletto G, Raimondi MT, Bertoli S, Cereda C, Zuccotti GV, Cancello R, Carelli S. Transcriptional characterization of subcutaneous adipose tissue in obesity affected women highlights metabolic dysfunction and implications for lncRNAs. Genomics 2021; 113:3919-3934. [PMID: 34555498 DOI: 10.1016/j.ygeno.2021.09.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 09/03/2021] [Accepted: 09/17/2021] [Indexed: 10/20/2022]
Abstract
Obesity is a complex disease with multifactorial causes, and its prevalence is becoming a serious health crisis. For this reason, there is a crucial need to identify novel targets and players. With this aim in mind, we analyzed via RNA-sequencing the subcutaneous adipose tissue of normal weight and obesity-affected women, highlighting the differential expression in the two tissues. We specifically focused on long non-coding RNAs, as 6 of these emerged as dysregulated in the diseased-tissue (COL4A2-AS2, RPS21-AS, PELATON, ITGB2-AS1, ACER2-AS and CTEPHA1). For each of them, we performed both a thorough in silico dissection and in vitro validation, to predict their function during adipogenesis. We report the lncRNAs expression during adipose derived stem cells differentiation to adipocytes as model of adipogenesis and their potential modulation by adipogenesis-related transcription factors (C/EBPs and PPARγ). Moreover, inhibiting CTEPHA1 expression we investigated its impact on adipogenesis-related transcription factors, showing its significative dysregulation of C/EBPα expression. Lastly, we dissected the subcellular localization, pathway involvement and disease-correlation for coding differentially expressed genes. Together, these findings highlight a transcriptional deregulation at the basis of obesity, impacted by both coding and long non-coding RNAs.
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Affiliation(s)
- Federica Rey
- Department of Biomedical and Clinical Sciences "L. Sacco", University of Milan, Via Grassi 74, 20157 Milan, Italy; Pediatric Clinical Research Centre Fondazione "Romeo ed Enrica Invernizzi", University of Milano, Milano, Italy
| | - Letizia Messa
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Milano, Italy
| | - Cecilia Pandini
- Genomic and post-Genomic Centre, IRCCS Mondino Foundation, 27100 Pavia, Italy
| | - Bianca Barzaghini
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Milano, Italy
| | - Giancarlo Micheletto
- Department of Pathophysiology and Transplantation, INCO, Department of General Surgery, Istituto Clinico Sant'Ambrogio, University of Milan, Milan, Italy
| | - Manuela Teresa Raimondi
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Milano, Italy
| | - Simona Bertoli
- Obesity Unit, Laboratory of Nutrition and Obesity Research, Department of Endocrine and Metabolic Diseases, IRCCS Istituto Auxologico Italiano, Milan, Italy; International Center for the Assessment of Nutritional Status (ICANS), Department of Food, Environmental and Nutritional Sciences (DeFENS), University of Milan, Milan, Italy
| | - Cristina Cereda
- Genomic and post-Genomic Centre, IRCCS Mondino Foundation, 27100 Pavia, Italy
| | - Gian Vincenzo Zuccotti
- Department of Biomedical and Clinical Sciences "L. Sacco", University of Milan, Via Grassi 74, 20157 Milan, Italy; Pediatric Clinical Research Centre Fondazione "Romeo ed Enrica Invernizzi", University of Milano, Milano, Italy; Department of Pediatrics, Children's Hospital "V. Buzzi", Milan, Italy
| | - Raffaella Cancello
- Obesity Unit, Laboratory of Nutrition and Obesity Research, Department of Endocrine and Metabolic Diseases, IRCCS Istituto Auxologico Italiano, Milan, Italy
| | - Stephana Carelli
- Department of Biomedical and Clinical Sciences "L. Sacco", University of Milan, Via Grassi 74, 20157 Milan, Italy; Pediatric Clinical Research Centre Fondazione "Romeo ed Enrica Invernizzi", University of Milano, Milano, Italy.
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Neural Precursor Cells Expanded Inside the 3D Micro-Scaffold Nichoid Present Different Non-Coding RNAs Profiles and Transcript Isoforms Expression: Possible Epigenetic Modulation by 3D Growth. Biomedicines 2021; 9:biomedicines9091120. [PMID: 34572306 PMCID: PMC8472193 DOI: 10.3390/biomedicines9091120] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 08/25/2021] [Accepted: 08/27/2021] [Indexed: 12/24/2022] Open
Abstract
Non-coding RNAs show relevant implications in various biological and pathological processes. Thus, understanding the biological implications of these molecules in stem cell biology still represents a major challenge. The aim of this work is to study the transcriptional dysregulation of 357 non-coding genes, found through RNA-Seq approach, in murine neural precursor cells expanded inside the 3D micro-scaffold Nichoid versus standard culture conditions. Through weighted co-expression network analysis and functional enrichment, we highlight the role of non-coding RNAs in altering the expression of coding genes involved in mechanotransduction, stemness, and neural differentiation. Moreover, as non-coding RNAs are poorly conserved between species, we focus on those with human homologue sequences, performing further computational characterization. Lastly, we looked for isoform switching as possible mechanism in altering coding and non-coding gene expression. Our results provide a comprehensive dissection of the 3D scaffold Nichoid's influence on the biological and genetic response of neural precursor cells. These findings shed light on the possible role of non-coding RNAs in 3D cell growth, indicating that also non-coding RNAs are implicated in cellular response to mechanical stimuli.
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