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Guo H, Zhang Y, Xiang X, Tang N, Gao W, Cui X. Single-cell RNA sequencing analysis provides novel insights into the role of apoptosis-related genes in muscle aging. Arch Gerontol Geriatr 2024; 125:105499. [PMID: 38852373 DOI: 10.1016/j.archger.2024.105499] [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: 04/05/2024] [Revised: 05/22/2024] [Accepted: 05/25/2024] [Indexed: 06/11/2024]
Abstract
OBJECTIVE This study employed a comprehensive single-cell analysis approach to explore the role of cell apoptosis-related genes in muscle aging. METHODS The single-cell RNA sequencing data from the GSE143704 dataset were used to identify distinct cell clusters and assess gene expression patterns related to apoptosis activation. The "limma" package was used to identify hub genes, after which we performed Gene Ontology (GO) analysis and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis to identify relevant pathways. Additionally, Gene Set Enrichment Analysis(GSEA) and Gene Set Variation Analysis (GSVA) were used to uncover relevant biological pathways. The Receiver Operating Characteristic Curve (ROC) was used to evaluate the diagnostic value of the hub genes. Single-sample Gene Set Enrichment Analysis (ssGSEA) was used to analyze the immune cell infiltration levels. RESULTS Single-cell sequencing data from muscle aging patients allowed the identification of various cell types, including epithelial cells, adipocytes, and tissue-resident macrophages. By conducting a differential expression analysis that intersected active and nonactive apoptosis, as well as comparing elderly and young samples, a total of 22 hub genes were identified (p < 0.05). The 22 hub genes have discriminative ability as potential biomarkers for diagnosing muscle aging. The enrichment analysis indicated that these genes were closely associated with diverse pathways, including "response to UV-B" and "extracellular matrix organization" (p < 0.05). Furthermore, GSEA and GSVA indicated that multiple pathways emerged-for example, the "complement and coagulation cascades", "proteasome", "insulin signaling pathway", and "MAPK signaling pathway". Additionally, the analysis of immune cell infiltration revealed positive correlations between most of the hub genes and immune cells. CONCLUSION Our study identified 22 apoptosis-related genes involved in muscle aging and indicated their potential diagnostic value. These findings offer a novel perspective on the pathogenesis of muscle aging and present potential targets for therapeutic interventions.
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Affiliation(s)
- Hua Guo
- Department of General Medicine and Sleep Medicine Center, The Affiliated Wuxi People's Hospital of Nanjing Medical University; Wuxi Medical Center, Nanjing Medical University Wuxi People's Hospital, Wuxi, Jiangsu Province, China
| | - Yunyun Zhang
- Department of General Medicine and Sleep Medicine Center, The Affiliated Wuxi People's Hospital of Nanjing Medical University; Wuxi Medical Center, Nanjing Medical University Wuxi People's Hospital, Wuxi, Jiangsu Province, China
| | - Xin Xiang
- Nanjing Medical University, Nanjing, Jiangsu, China
| | - Na Tang
- Nanjing Medical University, Nanjing, Jiangsu, China
| | - Wei Gao
- Department of Geriatrics, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China.
| | - Xiaochuan Cui
- Department of General Medicine and Sleep Medicine Center, The Affiliated Wuxi People's Hospital of Nanjing Medical University; Wuxi Medical Center, Nanjing Medical University Wuxi People's Hospital, Wuxi, Jiangsu Province, China.
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2
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de Jong JCBC, Attema BJ, van der Hoek MD, Verschuren L, Caspers MPM, Kleemann R, van der Leij FR, van den Hoek AM, Nieuwenhuizen AG, Keijer J. Sex differences in skeletal muscle-aging trajectory: same processes, but with a different ranking. GeroScience 2023; 45:2367-2386. [PMID: 36820956 PMCID: PMC10651666 DOI: 10.1007/s11357-023-00750-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Accepted: 02/02/2023] [Indexed: 02/24/2023] Open
Abstract
Sex differences in muscle aging are poorly understood, but could be crucial for the optimization of sarcopenia-related interventions. To gain insight into potential sex differences in muscle aging, we recruited young (23 ± 2 years, 13 males and 13 females) and old (80 ± 3.5 years, 28 males and 26 females) participants. Males and females in both groups were highly matched, and vastus lateralis muscle parameters of old versus young participants were compared for each sex separately, focusing on gene expression. The overall gene expression profiles separated the sexes, but similar gene expression patterns separated old from young participants in males and females. Genes were indeed regulated in the same direction in both sexes during aging; however, the magnitude of differential expression was sex specific. In males, oxidative phosphorylation was the top-ranked differentially expressed process, and in females, this was cell growth mediated by AKT signaling. Findings from RNA-seq data were studied in greater detail using alternative approaches. In addition, we confirmed our data using publicly available data from three independent human studies. In conclusion, top-ranked pathways differ between males and females, but were present and altered in the same direction in both sexes. We conclude that the same processes are associated with skeletal muscle aging in males and females, but the differential expression of those processes in old vs. young participants is sex specific.
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Affiliation(s)
- Jelle C B C de Jong
- Human and Animal Physiology, Wageningen University, 6700AH, Wageningen, The Netherlands
- Department of Metabolic Health Research, The Netherlands Organization for Applied Scientific Research (TNO), Leiden, The Netherlands
| | - Brecht J Attema
- Human and Animal Physiology, Wageningen University, 6700AH, Wageningen, The Netherlands
| | - Marjanne D van der Hoek
- Human and Animal Physiology, Wageningen University, 6700AH, Wageningen, The Netherlands
- Applied Research Centre Food and Dairy, Van Hall Larenstein University of Applied Sciences, Leeuwarden, The Netherlands
- MCL Academy, Medical Centre Leeuwarden, Leeuwarden, The Netherlands
| | - Lars Verschuren
- Department of Microbiology and Systems Biology, The Netherlands Organization for Applied Scientific Research (TNO), Zeist, The Netherlands
| | - Martien P M Caspers
- Department of Microbiology and Systems Biology, The Netherlands Organization for Applied Scientific Research (TNO), Zeist, The Netherlands
| | - Robert Kleemann
- Department of Metabolic Health Research, The Netherlands Organization for Applied Scientific Research (TNO), Leiden, The Netherlands
| | - Feike R van der Leij
- Applied Research Centre Food and Dairy, Van Hall Larenstein University of Applied Sciences, Leeuwarden, The Netherlands
- Research and Innovation Centre Agri, Food & Life Sciences, Inholland University of Applied Sciences, Delft and Amsterdam, The Netherlands
| | - Anita M van den Hoek
- Department of Metabolic Health Research, The Netherlands Organization for Applied Scientific Research (TNO), Leiden, The Netherlands
| | - Arie G Nieuwenhuizen
- Human and Animal Physiology, Wageningen University, 6700AH, Wageningen, The Netherlands
| | - Jaap Keijer
- Human and Animal Physiology, Wageningen University, 6700AH, Wageningen, The Netherlands.
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3
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Therapeutic targeting the oncogenic driver EWSR1::FLI1 in Ewing sarcoma through inhibition of the FACT complex. Oncogene 2023; 42:11-25. [PMID: 36357572 DOI: 10.1038/s41388-022-02533-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 10/26/2022] [Accepted: 10/27/2022] [Indexed: 11/12/2022]
Abstract
EWS/ETS fusion transcription factors, most commonly EWSR1::FLI1, drives initiation and progression of Ewing sarcoma (EwS). Even though direct targeting EWSR1::FLI1 is a formidable challenge, epigenetic/transcriptional modulators have been proved to be promising therapeutic targets for indirectly disrupting its expression and/or function. Here, we identified structure-specific recognition protein 1 (SSRP1), a subunit of the Facilitates Chromatin Transcription (FACT) complex, to be an essential tumor-dependent gene directly induced by EWSR1::FLI1 in EwS. The FACT-targeted drug CBL0137 exhibits potent therapeutic efficacy against multiple EwS preclinical models both in vitro and in vivo. Mechanistically, SSRP1 and EWSR1::FLI1 form oncogenic positive feedback loop via mutual transcriptional regulation and activation, and cooperatively promote cell cycle/DNA replication process and IGF1R-PI3K-AKT-mTOR pathway to drive EwS oncogenesis. The FACT inhibitor drug CBL0137 effectively targets the EWSR1::FLI1-FACT circuit, resulting in transcriptional disruption of EWSR1::FLI1, SSRP1 and their downstream effector oncogenic signatures. Our study illustrates a crucial role of the FACT complex in facilitating the expression and function of EWSR1::FLI1 and demonstrates FACT inhibition as a novel and effective epigenetic/transcriptional-targeted therapeutic strategy against EwS, providing preclinical support for adding EwS to CBL0137's future clinical trials.
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4
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Kim D, Kiprov DD, Luellen C, Lieb M, Liu C, Watanabe E, Mei X, Cassaleto K, Kramer J, Conboy MJ, Conboy IM. Old plasma dilution reduces human biological age: a clinical study. GeroScience 2022; 44:2701-2720. [PMID: 35999337 PMCID: PMC9398900 DOI: 10.1007/s11357-022-00645-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 08/10/2022] [Indexed: 01/07/2023] Open
Abstract
This work extrapolates to humans the previous animal studies on blood heterochronicity and establishes a novel direct measurement of biological age. Our results support the hypothesis that, similar to mice, human aging is driven by age-imposed systemic molecular excess, the attenuation of which reverses biological age, defined in our work as a deregulation (noise) of 10 novel protein biomarkers. The results on biological age are strongly supported by the data, which demonstrates that rounds of therapeutic plasma exchange (TPE) promote a global shift to a younger systemic proteome, including youthfully restored pro-regenerative, anticancer, and apoptotic regulators and a youthful profile of myeloid/lymphoid markers in circulating cells, which have reduced cellular senescence and lower DNA damage. Mechanistically, the circulatory regulators of the JAK-STAT, MAPK, TGF-beta, NF-κB, and Toll-like receptor signaling pathways become more youthfully balanced through normalization of TLR4, which we define as a nodal point of this molecular rejuvenation. The significance of our findings is confirmed through big-data gene expression studies.
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Affiliation(s)
- Daehwan Kim
- Department of Bioengineering and QB3 Institute, University of California, Berkeley, CA, 94720, USA
| | | | - Connor Luellen
- Biophysics, University of California, Berkeley, Berkeley, CA, 94720, USA
| | - Michael Lieb
- Department of Bioengineering and QB3 Institute, University of California, Berkeley, CA, 94720, USA
| | - Chao Liu
- Department of Bioengineering and QB3 Institute, University of California, Berkeley, CA, 94720, USA
| | - Etsuko Watanabe
- Department of Bioengineering and QB3 Institute, University of California, Berkeley, CA, 94720, USA
| | - Xiaoyue Mei
- Department of Bioengineering and QB3 Institute, University of California, Berkeley, CA, 94720, USA
| | | | - Joel Kramer
- Brain Aging Center, UCSF, San Francisco, USA
| | - Michael J Conboy
- Department of Bioengineering and QB3 Institute, University of California, Berkeley, CA, 94720, USA
| | - Irina M Conboy
- Department of Bioengineering and QB3 Institute, University of California, Berkeley, CA, 94720, USA.
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5
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Bellanti F, Lo Buglio A, Vendemiale G. Muscle Delivery of Mitochondria-Targeted Drugs for the Treatment of Sarcopenia: Rationale and Perspectives. Pharmaceutics 2022; 14:pharmaceutics14122588. [PMID: 36559079 PMCID: PMC9782427 DOI: 10.3390/pharmaceutics14122588] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 11/18/2022] [Accepted: 11/19/2022] [Indexed: 11/27/2022] Open
Abstract
An impairment in mitochondrial homeostasis plays a crucial role in the process of aging and contributes to the incidence of age-related diseases, including sarcopenia, which is defined as an age-dependent loss of muscle mass and strength. Mitochondrial dysfunction exerts a negative impact on several cellular activities, including bioenergetics, metabolism, and apoptosis. In sarcopenia, mitochondria homeostasis is disrupted because of reduced oxidative phosphorylation and ATP generation, the enhanced production of reactive species, and impaired antioxidant defense. This review re-establishes the most recent evidence on mitochondrial defects that are thought to be relevant in the pathogenesis of sarcopenia and that may represent promising therapeutic targets for its prevention/treatment. Furthermore, we describe mechanisms of action and translational potential of promising mitochondria-targeted drug delivery systems, including molecules able to boost the metabolism and bioenergetics, counteract apoptosis, antioxidants to scavenge reactive species and decrease oxidative stress, and target mitophagy. Even though these mitochondria-delivered strategies demonstrate to be promising in preclinical models, their use needs to be promoted for clinical studies. Therefore, there is a compelling demand to further understand the mechanisms modulating mitochondrial homeostasis, to characterize powerful compounds that target muscle mitochondria to prevent sarcopenia in aged people.
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6
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Qin Y, Yi D, Chen X, Guan Y. Deep learning identifies erroneous microarray-based, gene-level conclusions in literature. NAR Genom Bioinform 2021; 3:lqab089. [PMID: 34617014 PMCID: PMC8489595 DOI: 10.1093/nargab/lqab089] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 08/25/2021] [Accepted: 09/17/2021] [Indexed: 11/14/2022] Open
Abstract
More than 110 000 publications have used microarrays to decipher phenotype-associated genes, clinical biomarkers and gene functions. Microarrays rely on digital assaying the fluorescence signals of arrays. In this study, we retrospectively constructed raw images for 37 724 published microarray data, and developed deep learning algorithms to automatically detect systematic defects. We report that an alarming amount of 26.73% of the microarray-based studies are affected by serious imaging defects. By literature mining, we found that publications associated with these affected microarrays have reported disproportionately more biological discoveries on the genes in the contaminated areas compared to other genes. 28.82% of the gene-level conclusions reported in these publications were based on measurements falling into the contaminated area, indicating severe, systematic problems caused by such contaminations. We provided the identified published, problematic datasets, affected genes and the imputed arrays as well as software tools for scanning such contamination that will become essential to future studies to scrutinize and critically analyze microarray data.
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Affiliation(s)
- Yanan Qin
- Department of Computational Medicine and Bioinformatics, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Daiyao Yi
- Department of Computational Medicine and Bioinformatics, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Xianghao Chen
- Department of Computational Medicine and Bioinformatics, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Yuanfang Guan
- Department of Computational Medicine and Bioinformatics, University of Michigan Medical School, Ann Arbor, MI 48109, USA
- Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI 48109, USA
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7
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von Walden F, Vechetti IJ, Englund D, Figueiredo VC, Fernandez-Gonzalo R, Murach K, Pingel J, Mccarthy JJ, Stål P, Pontén E. Reduced mitochondrial DNA and OXPHOS protein content in skeletal muscle of children with cerebral palsy. Dev Med Child Neurol 2021; 63:1204-1212. [PMID: 34176131 DOI: 10.1111/dmcn.14964] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/20/2021] [Indexed: 02/06/2023]
Abstract
AIM To provide a detailed gene and protein expression analysis related to mitochondrial biogenesis and assess mitochondrial content in skeletal muscle of children with cerebral palsy (CP). METHOD Biceps brachii muscle samples were collected from 19 children with CP (mean [SD] age 15y 4mo [2y 6mo], range 9-18y, 16 males, three females) and 10 typically developing comparison children (mean [SD] age 15y [4y], range 7-21y, eight males, two females). Gene expression (quantitative reverse transcription polymerase chain reaction [PCR]), mitochondrial DNA (mtDNA) to genomic DNA ratio (quantitative PCR), and protein abundance (western blotting) were analyzed. Microarray data sets (CP/aging/bed rest) were analyzed with a focused query investigating metabolism- and mitochondria-related gene networks. RESULTS The mtDNA to genomic DNA ratio was lower in the children with CP compared to the typically developing group (-23%, p=0.002). Out of five investigated complexes in the mitochondrial respiratory chain, we observed lower protein levels of all complexes (I, III, IV, V, -20% to -37%; p<0.05) except complex II. Total peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC1α) messenger RNA (p<0.004), isoforms PGC1α1 (p=0.05), and PGC1α4 (p<0.001) were reduced in CP. Transcriptional similarities were observed between CP, aging, and 90 days' bed rest. INTERPRETATION Mitochondrial biogenesis, mtDNA, and oxidative phosphorylation protein content are reduced in CP muscle compared with typically developing muscle. Transcriptional pathways shared between aging and long-term unloading suggests metabolic dysregulation in CP, which may guide therapeutic strategies for combatting CP muscle pathology. What this paper adds Cerebral palsy (CP) muscle contains fewer energy-generating organelles than typically developing muscle. Gene expression in CP muscle is similar to aging and long-term bed rest.
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Affiliation(s)
- Ferdinand von Walden
- Division of Pediatric Neurology, Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden.,Department of Physiology, University of Kentucky, Lexington, KY, USA.,Center for Muscle Biology, University of Kentucky, Lexington, KY, USA
| | - Ivan J Vechetti
- Department of Physiology, University of Kentucky, Lexington, KY, USA.,Center for Muscle Biology, University of Kentucky, Lexington, KY, USA.,Department of Nutrition and Health Sciences, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Davis Englund
- Center for Muscle Biology, University of Kentucky, Lexington, KY, USA.,Department of Physical Therapy, University of Kentucky, Lexington, KY, USA
| | - Vandré C Figueiredo
- Department of Physiology, University of Kentucky, Lexington, KY, USA.,Center for Muscle Biology, University of Kentucky, Lexington, KY, USA
| | - Rodrigo Fernandez-Gonzalo
- Department of Laboratory Medicine, Division of Clinical Physiology, Karolinska Institutet, Stockholm, Sweden.,Unit of Clinical Physiology, Karolinska University Hospital, Stockholm, Sweden
| | - Kevin Murach
- Center for Muscle Biology, University of Kentucky, Lexington, KY, USA.,Department of Physical Therapy, University of Kentucky, Lexington, KY, USA
| | - Jessica Pingel
- Department of Neuroscience, University of Copenhagen, Copenhagen, Denmark
| | - John J Mccarthy
- Department of Physiology, University of Kentucky, Lexington, KY, USA.,Center for Muscle Biology, University of Kentucky, Lexington, KY, USA
| | - Per Stål
- Department of Integrative Medical Biology, Laboratory of Muscle Biology, Umeå University, Umeå, Sweden
| | - Eva Pontén
- Division of Pediatric Neurology, Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden
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8
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Memme JM, Hood DA. Molecular Basis for the Therapeutic Effects of Exercise on Mitochondrial Defects. Front Physiol 2021; 11:615038. [PMID: 33584337 PMCID: PMC7874077 DOI: 10.3389/fphys.2020.615038] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 12/16/2020] [Indexed: 12/12/2022] Open
Abstract
Mitochondrial dysfunction is common to many organ system disorders, including skeletal muscle. Aging muscle and diseases of muscle are often accompanied by defective mitochondrial ATP production. This manuscript will focus on the pre-clinical evidence supporting the use of regular exercise to improve defective mitochondrial metabolism and function in skeletal muscle, through the stimulation of mitochondrial turnover. Examples from aging muscle, muscle-specific mutations and cancer cachexia will be discussed. We will also examine the effects of exercise on the important mitochondrial regulators PGC-1α, and Parkin, and summarize the effects of exercise to reverse mitochondrial dysfunction (e.g., ROS production, apoptotic susceptibility, cardiolipin synthesis) in muscle pathology. This paper will illustrate the breadth and benefits of exercise to serve as "mitochondrial medicine" with age and disease.
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Affiliation(s)
- Jonathan M. Memme
- Muscle Health Research Centre, York University, Toronto, ON, Canada
- School of Kinesiology and Health Science, York University, Toronto, ON, Canada
| | - David A. Hood
- Muscle Health Research Centre, York University, Toronto, ON, Canada
- School of Kinesiology and Health Science, York University, Toronto, ON, Canada
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9
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Bellanti F, Lo Buglio A, Vendemiale G. Mitochondrial Impairment in Sarcopenia. BIOLOGY 2021; 10:biology10010031. [PMID: 33418869 PMCID: PMC7825073 DOI: 10.3390/biology10010031] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 12/21/2020] [Accepted: 12/25/2020] [Indexed: 02/07/2023]
Abstract
Sarcopenia is defined by the age-related loss of skeletal muscle quality, which relies on mitochondrial homeostasis. During aging, several mitochondrial features such as bioenergetics, dynamics, biogenesis, and selective autophagy (mitophagy) are altered and impinge on protein homeostasis, resulting in loss of muscle mass and function. Thus, mitochondrial dysfunction contributes significantly to the complex pathogenesis of sarcopenia, and mitochondria are indicated as potential targets to prevent and treat this age-related condition. After a concise presentation of the age-related modifications in skeletal muscle quality and mitochondrial homeostasis, the present review summarizes the most relevant findings related to mitochondrial alterations in sarcopenia.
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10
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Su Y, Lam FMH, Leung J, Cheung WH, Ho SC, Kwok T. The Predictive Value of Sarcopenia and Falls for 2-Year Major Osteoporotic Fractures in Community-Dwelling Older Adults. Calcif Tissue Int 2020; 107:151-159. [PMID: 32472390 PMCID: PMC7382674 DOI: 10.1007/s00223-020-00709-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2019] [Accepted: 05/19/2020] [Indexed: 12/26/2022]
Abstract
To evaluate the associations of sarcopenia and previous falls with 2-year major osteoporotic fractures (MOFs) in community-dwelling older adults. Four thousand Chinese men and women ≥ 65 years recruited from Hong Kong communities were prospectively followed up. Measures of muscle mass, grip strength, gait speed and falls in the previous year were recorded at baseline, the 2nd year and the 4th year visit for each subject. The associations of fall history, sarcopenia and its components with 2-year MOFs were evaluated using generalized linear mixed models. Poor grip strength and poor gait speed were significantly associated with a higher 2-year MOFs risk, with an adjusted OR (95% CI) per one SD decrease of 1.48 (1.17, 1.87) and 1.17 (1.00, 1.36), respectively. Falls in the previous year was a significant predictor for 2-year MOFs risk, with an adjusted OR (95% CI) per one added fall of 1.85 (1.40, 2.44) in men and 1.26 (1.01, 1.58) in women. The adjusted OR (95% CI) of height adjusted appendicular lean muscle mass (ALM/height2) per one SD decrease and sarcopenia for 2-year MOFs risk were 1.34 (0.87, 2.06) and 1.72 (0.92, 3.21) in men, and were 0.73 (0.57, 0.93) and 0.76 (0.39, 1.47) in women, respectively (P for interaction by gender = 0.012 and 0.017, respectively). Poor sarcopenia-related physical performance and falls in the previous year were significant predictors for 2-year MOFs in community-dwelling older adults. The predictive value of ALM by DXA for near-term fracture risk is limited and different across genders.
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Affiliation(s)
- Yi Su
- Department of Medicine and Therapeutics, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Freddy M H Lam
- Department of Medicine and Therapeutics, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Jason Leung
- Jockey Club Centre for Osteoporosis Care and Control, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Wing-Hoi Cheung
- Musculoskeletal Research Laboratory, Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Suzanne C Ho
- Division of Epidemiology, The Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Timothy Kwok
- Department of Medicine and Therapeutics, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China.
- Jockey Club Centre for Osteoporosis Care and Control, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China.
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11
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Hoek MD, Nieuwenhuizen AG, Kuda O, Bos P, Paluchová V, Verschuren L, Hoek AM, Kleemann R, Veeger NJGM, Leij FR, Keijer J. Intramuscular short‐chain acylcarnitines in elderly people are decreased in (pre‐)frail females, but not in males. FASEB J 2020; 34:11658-11671. [DOI: 10.1096/fj.202000493r] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 05/01/2020] [Accepted: 06/15/2020] [Indexed: 01/01/2023]
Affiliation(s)
- Marjanne D. Hoek
- Human and Animal Physiology Wageningen University Wageningen the Netherlands
- Applied Research Centre Food and Dairy Van Hall Larenstein University of Applied Sciences Leeuwarden the Netherlands
- MCL Academy, Medical Centre Leeuwarden Leeuwarden the Netherlands
| | | | - Ondřej Kuda
- Institute of Physiology Czech Academy of Sciences Prague Czech Republic
| | - Paul Bos
- MCL Academy, Medical Centre Leeuwarden Leeuwarden the Netherlands
| | | | - Lars Verschuren
- The Netherlands Organization for Applied Scientific Research (TNO) Department of Metabolic Health Research TNO Metabolic Health Research Leiden the Netherlands
| | - Anita M. Hoek
- The Netherlands Organization for Applied Scientific Research (TNO) Department of Metabolic Health Research TNO Metabolic Health Research Leiden the Netherlands
| | - Robert Kleemann
- The Netherlands Organization for Applied Scientific Research (TNO) Department of Metabolic Health Research TNO Metabolic Health Research Leiden the Netherlands
| | | | - Feike R. Leij
- Applied Research Centre Food and Dairy Van Hall Larenstein University of Applied Sciences Leeuwarden the Netherlands
- RIC‐AFL Inholland University of Applied Sciences Delft and Amsterdam the Netherlands
| | - Jaap Keijer
- Human and Animal Physiology Wageningen University Wageningen the Netherlands
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12
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Gokuladhas S, Schierding W, Cameron-Smith D, Wake M, Scotter EL, O’Sullivan J. Shared Regulatory Pathways Reveal Novel Genetic Correlations Between Grip Strength and Neuromuscular Disorders. Front Genet 2020; 11:393. [PMID: 32391060 PMCID: PMC7194178 DOI: 10.3389/fgene.2020.00393] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 03/30/2020] [Indexed: 12/13/2022] Open
Abstract
Muscle weakness is a common consequence of both aging (sarcopenia) and neuromuscular disorders (NMD). Whilst genome-wide association (GWA) studies have identified genetic variants associated with grip strength (GS; measure of muscle strength/weakness) and NMDs, including multiple sclerosis (MS), myasthenia gravis (MG) and amyotrophic lateral sclerosis (ALS), it is not known whether there are common mechanisms between these phenotypes. To examine this, we have integrated GS and NMD associated genetic variants (single nucleotide polymorphisms; SNPs) in a multimorbid analysis that leverages high-throughput chromatin interaction (Hi-C) data and expression quantitative trait loci data to identify target genes (i.e., SNP-mediated gene regulation). Biological pathways enriched by these genes were then identified using next-generation pathway enrichment analysis. Lastly, druggable genes were identified using drug gene interaction (DGI) database. We identified gene regulatory mechanisms associated with GS, MG, MS, and ALS. The SNPs associated with GS regulate a subset of genes that are also regulated by the SNPs of MS, MG, and ALS. Yet, we did not find any genes commonly regulated by all four phenotype associated SNPs. By contrast, we identified significant enrichment in three pathways (mTOR signaling, axon guidance, and alcoholism) that are commonly affected by the gene regulatory mechanisms associated with all four phenotypes. 13% of the genes we identified were known drug targets, and GS shares at least one druggable gene and pathway with each of the NMD phenotypes. We have identified significant biological overlaps between GS and NMD, demonstrating the potential for spatial genetic analysis to identify common mechanisms between potential multimorbid phenotypes. Collectively, our results form the foundation for a shift from a gene to a pathway-based approach to the rationale design of therapeutic interventions and treatments for NMD.
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Affiliation(s)
| | | | - David Cameron-Smith
- Liggins Institute, The University of Auckland, Auckland, New Zealand
- Singapore Institute for Clinical Sciences, Agency for Science, Technology and Research (ASTAR), Singapore, Singapore
| | - Melissa Wake
- Murdoch Children’s Research Institute, The University of Melbourne, Parkville, VIC, Australia
| | - Emma L. Scotter
- Department of Pharmacology and Clinical Pharmacology, The University of Auckland, Auckland, New Zealand
- Centre for Brain Research, The University of Auckland, Auckland, New Zealand
| | - Justin O’Sullivan
- Liggins Institute, The University of Auckland, Auckland, New Zealand
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13
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Wu CS, Wei Q, Wang H, Kim DM, Balderas M, Wu G, Lawler J, Safe S, Guo S, Devaraj S, Chen Z, Sun Y. Protective Effects of Ghrelin on Fasting-Induced Muscle Atrophy in Aging Mice. J Gerontol A Biol Sci Med Sci 2020; 75:621-630. [PMID: 30407483 PMCID: PMC7328200 DOI: 10.1093/gerona/gly256] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Indexed: 12/12/2022] Open
Abstract
Sarcopenia is the aging-associated progressive loss of skeletal muscle; however, the pathogenic mechanism of sarcopenia is not clear. The orexigenic hormone ghrelin stimulates growth hormone secretion, increases food intake, and promotes adiposity. Here we showed that fasting-induced muscle loss was exacerbated in old ghrelin-null (Ghrl-/-) mice, exhibiting decreased expression of myogenic regulator MyoD and increased expression of protein degradation marker MuRF1, as well as altered mitochondrial function. Moreover, acylated ghrelin and unacylated ghrelin treatments significantly increased mitochondrial respiration capacity in muscle C2C12 cells. Consistently, acylated ghrelin and unacylated ghrelin treatments effectively increased myogenic genes and decreased degradation genes in the muscle in fasted old Ghrl-/- mice, possibly by stimulating insulin and adenosine monophosphate-activated protein kinase pathways. Furthermore, Ghrl-/- mice showed a profile of pro-inflammatory gut microbiota, exhibiting reduced butyrate-producing bacteria Roseburia and ClostridiumXIVb. Collectively, our results showed that ghrelin has a major role in the maintenance of aging muscle via both muscle-intrinsic and -extrinsic mechanisms. Acylated ghrelin and unacylated ghrelin enhanced muscle anabolism and exerted protective effects for muscle atrophy. Because unacylated ghrelin is devoid of the obesogenic side effect seen with acylated ghrelin, it represents an attractive therapeutic option for sarcopenia.
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Affiliation(s)
- Chia-Shan Wu
- Department of Nutrition and Food Science, Texas A&M University, College Station
- USDA/ARS Children’s Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, Texas
| | - Qiong Wei
- USDA/ARS Children’s Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, Texas
- Division of Endocrinology, Zhongda Hospital, Southeast University, Nanjing, Jiangsu Province
| | - Hongying Wang
- Department of Nutrition and Food Science, Texas A&M University, College Station
- Laboratory of Lipid and Glucose Metabolism, The First Affiliated Hospital of Chongqing Medical University, China
| | - Da Mi Kim
- Department of Nutrition and Food Science, Texas A&M University, College Station
| | - Miriam Balderas
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, Texas
| | - Guoyao Wu
- Department of Animal Science, Texas A&M University, College Station
| | - John Lawler
- Department of Health and Kinesiology, Texas A&M University, College Station
| | - Stephen Safe
- Department of Veterinary Physiology and Pharmacology, Texas A&M University, College Station
| | - Shaodong Guo
- Department of Nutrition and Food Science, Texas A&M University, College Station
| | - Sridevi Devaraj
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, Texas
| | - Zheng Chen
- The University of Texas Health Science Center at Houston
| | - Yuxiang Sun
- Department of Nutrition and Food Science, Texas A&M University, College Station
- USDA/ARS Children’s Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, Texas
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14
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Migliavacca E, Tay SKH, Patel HP, Sonntag T, Civiletto G, McFarlane C, Forrester T, Barton SJ, Leow MK, Antoun E, Charpagne A, Seng Chong Y, Descombes P, Feng L, Francis-Emmanuel P, Garratt ES, Giner MP, Green CO, Karaz S, Kothandaraman N, Marquis J, Metairon S, Moco S, Nelson G, Ngo S, Pleasants T, Raymond F, Sayer AA, Ming Sim C, Slater-Jefferies J, Syddall HE, Fang Tan P, Titcombe P, Vaz C, Westbury LD, Wong G, Yonghui W, Cooper C, Sheppard A, Godfrey KM, Lillycrop KA, Karnani N, Feige JN. Mitochondrial oxidative capacity and NAD + biosynthesis are reduced in human sarcopenia across ethnicities. Nat Commun 2019; 10:5808. [PMID: 31862890 PMCID: PMC6925228 DOI: 10.1038/s41467-019-13694-1] [Citation(s) in RCA: 136] [Impact Index Per Article: 27.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Accepted: 11/15/2019] [Indexed: 01/03/2023] Open
Abstract
The causes of impaired skeletal muscle mass and strength during aging are well-studied in healthy populations. Less is known on pathological age-related muscle wasting and weakness termed sarcopenia, which directly impacts physical autonomy and survival. Here, we compare genome-wide transcriptional changes of sarcopenia versus age-matched controls in muscle biopsies from 119 older men from Singapore, Hertfordshire UK and Jamaica. Individuals with sarcopenia reproducibly demonstrate a prominent transcriptional signature of mitochondrial bioenergetic dysfunction in skeletal muscle, with low PGC-1α/ERRα signalling, and downregulation of oxidative phosphorylation and mitochondrial proteostasis genes. These changes translate functionally into fewer mitochondria, reduced mitochondrial respiratory complex expression and activity, and low NAD+ levels through perturbed NAD+ biosynthesis and salvage in sarcopenic muscle. We provide an integrated molecular profile of human sarcopenia across ethnicities, demonstrating a fundamental role of altered mitochondrial metabolism in the pathological loss of skeletal muscle mass and function in older people.
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Affiliation(s)
| | - Stacey K H Tay
- KTP-National University Children's Medical Institute, National University Hospital, Singapore, Singapore
- Department of Paediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Harnish P Patel
- Medical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK
- National Institute for Health Research Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, UK
- Academic Geriatric Medicine, , University of Southampton, Southampton, UK
| | - Tanja Sonntag
- Nestle Research, EPFL Innovation Park, Lausanne, Switzerland
- EPFL school of Life Sciences, Ecole Polytechnique Federale de Lausanne, Lausanne, Switzerland
| | | | - Craig McFarlane
- Department of Molecular & Cell Biology, College of Public Health, Medical & Veterinary Sciences, James Cook University, Townsville, Queensland, Australia
| | - Terence Forrester
- UWI Solutions for Developing Countries, UWI SODECO, University of West Indies, Kingston, Jamaica
| | - Sheila J Barton
- Medical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK
| | - Melvin K Leow
- Singapore Institute for Clinical Sciences (A*STAR), Singapore, Singapore
- Department of Endocrinology, Tan Tock Seng Hospital, Singapore, Singapore
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore
| | - Elie Antoun
- Institute of Developmental Sciences, University of Southampton, Southampton, UK
- Centre for Biological Sciences, University of Southampton, Southampton, UK
| | - Aline Charpagne
- Nestle Research, EPFL Innovation Park, Lausanne, Switzerland
| | - Yap Seng Chong
- Singapore Institute for Clinical Sciences (A*STAR), Singapore, Singapore
- Department of Obstetrics and Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | | | - Lei Feng
- Department of Psychological Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Patrice Francis-Emmanuel
- UWI Solutions for Developing Countries, UWI SODECO, University of West Indies, Kingston, Jamaica
| | - Emma S Garratt
- National Institute for Health Research Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, UK
- Institute of Developmental Sciences, University of Southampton, Southampton, UK
| | | | - Curtis O Green
- UWI Solutions for Developing Countries, UWI SODECO, University of West Indies, Kingston, Jamaica
| | - Sonia Karaz
- Nestle Research, EPFL Innovation Park, Lausanne, Switzerland
| | | | - Julien Marquis
- Nestle Research, EPFL Innovation Park, Lausanne, Switzerland
| | | | - Sofia Moco
- Nestle Research, EPFL Innovation Park, Lausanne, Switzerland
| | - Gail Nelson
- UWI Solutions for Developing Countries, UWI SODECO, University of West Indies, Kingston, Jamaica
| | - Sherry Ngo
- Liggins Institute, University of Auckland, Auckland, New Zealand
| | - Tony Pleasants
- Liggins Institute, University of Auckland, Auckland, New Zealand
| | | | - Avan A Sayer
- Academic Geriatric Medicine, , University of Southampton, Southampton, UK
- AGE Research Group, Institute of Neuroscience, Faculty of Medical Sciences, Newcastle University, Newcastle, UK
- NIHR Newcastle Biomedical Research Centre, Newcastle upon-Tyne NHS Foundation Trust and Newcastle University, Newcastle, UK
| | - Chu Ming Sim
- Singapore Institute for Clinical Sciences (A*STAR), Singapore, Singapore
| | - Jo Slater-Jefferies
- Institute of Developmental Sciences, University of Southampton, Southampton, UK
| | - Holly E Syddall
- Medical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK
| | - Pei Fang Tan
- Singapore Institute for Clinical Sciences (A*STAR), Singapore, Singapore
| | - Philip Titcombe
- Medical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK
| | - Candida Vaz
- Singapore Institute for Clinical Sciences (A*STAR), Singapore, Singapore
| | - Leo D Westbury
- Medical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK
| | - Gerard Wong
- Singapore Institute for Clinical Sciences (A*STAR), Singapore, Singapore
| | - Wu Yonghui
- Singapore Institute for Clinical Sciences (A*STAR), Singapore, Singapore
| | - Cyrus Cooper
- Medical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK
- National Institute for Health Research Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, UK
- National Institute for Health Research Musculoskeletal Biomedical Research Unit, University of Oxford, Oxford, UK
| | - Allan Sheppard
- Liggins Institute, University of Auckland, Auckland, New Zealand
| | - Keith M Godfrey
- Medical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK.
- National Institute for Health Research Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, UK.
- Institute of Developmental Sciences, University of Southampton, Southampton, UK.
| | - Karen A Lillycrop
- National Institute for Health Research Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, UK.
- Institute of Developmental Sciences, University of Southampton, Southampton, UK.
- Centre for Biological Sciences, University of Southampton, Southampton, UK.
| | - Neerja Karnani
- Singapore Institute for Clinical Sciences (A*STAR), Singapore, Singapore.
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
| | - Jerome N Feige
- Nestle Research, EPFL Innovation Park, Lausanne, Switzerland.
- EPFL school of Life Sciences, Ecole Polytechnique Federale de Lausanne, Lausanne, Switzerland.
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15
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Memme JM, Erlich AT, Phukan G, Hood DA. Exercise and mitochondrial health. J Physiol 2019; 599:803-817. [PMID: 31674658 DOI: 10.1113/jp278853] [Citation(s) in RCA: 126] [Impact Index Per Article: 25.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Accepted: 10/28/2019] [Indexed: 12/12/2022] Open
Abstract
Mitochondrial health is an important mediator of cellular function across a range of tissues, and as a result contributes to whole-body vitality in health and disease. Our understanding of the regulation and function of these organelles is of great interest to scientists and clinicians across many disciplines within our healthcare system. Skeletal muscle is a useful model tissue for the study of mitochondrial adaptations because of its mass and contribution to whole body metabolism. The remarkable plasticity of mitochondria allows them to adjust their volume, structure and capacity under conditions such as exercise, which is useful or improving metabolic health in individuals with various diseases and/or advancing age. Mitochondria exist within muscle as a functional reticulum which is maintained by dynamic processes of biogenesis and fusion, and is balanced by opposing processes of fission and mitophagy. The sophisticated coordination of these events is incompletely understood, but is imperative for organelle function and essential for the maintenance of an interconnected organelle network that is finely tuned to the metabolic needs of the cell. Further elucidation of the mechanisms of mitochondrial turnover in muscle could offer potential therapeutic targets for the advancement of health and longevity among our ageing populations. As well, investigating exercise modalities that are both convenient and capable of inducing robust mitochondrial adaptations are useful in fostering more widespread global adherence. To this point, exercise remains the most potent behavioural therapeutic approach for the improvement of mitochondrial health, not only in muscle, but potentially also in other tissues.
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Affiliation(s)
- Jonathan M Memme
- Muscle Health Research Centre, York University, Toronto, Ontario, Canada, M3J 1P3.,School of Kinesiology and Health Science, York University, Toronto, Ontario, Canada, M3J 1P3
| | - Avigail T Erlich
- Muscle Health Research Centre, York University, Toronto, Ontario, Canada, M3J 1P3.,School of Kinesiology and Health Science, York University, Toronto, Ontario, Canada, M3J 1P3
| | - Geetika Phukan
- Muscle Health Research Centre, York University, Toronto, Ontario, Canada, M3J 1P3.,School of Kinesiology and Health Science, York University, Toronto, Ontario, Canada, M3J 1P3
| | - David A Hood
- Muscle Health Research Centre, York University, Toronto, Ontario, Canada, M3J 1P3.,School of Kinesiology and Health Science, York University, Toronto, Ontario, Canada, M3J 1P3
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16
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Gensous N, Bacalini MG, Franceschi C, Meskers CGM, Maier AB, Garagnani P. Age-Related DNA Methylation Changes: Potential Impact on Skeletal Muscle Aging in Humans. Front Physiol 2019; 10:996. [PMID: 31427991 PMCID: PMC6688482 DOI: 10.3389/fphys.2019.00996] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Accepted: 07/18/2019] [Indexed: 12/27/2022] Open
Abstract
Human aging is accompanied by a decline in muscle mass and muscle function, which is commonly referred to as sarcopenia. Sarcopenia is associated with detrimental clinical outcomes, such as a reduced quality of life, frailty, an increased risk of falls, fractures, hospitalization, and mortality. The exact underlying mechanisms of sarcopenia are poorly delineated and the molecular mechanisms driving the development and progression of this disorder remain to be uncovered. Previous studies have described age-related differences in gene expression, with one study identifying an age-specific expression signature of sarcopenia, but little is known about the influence of epigenetics, and specially of DNA methylation, in its pathogenesis. In this review, we will focus on the available knowledge in literature on the characterization of DNA methylation profiles during skeletal muscle aging and the possible impact of physical activity and nutrition. We will consider the possible use of the recently developed DNA methylation-based biomarkers of aging called epigenetic clocks in the assessment of physical performance in older individuals. Finally, we will discuss limitations and future directions of this field.
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Affiliation(s)
- Noémie Gensous
- Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy
| | | | - Claudio Franceschi
- Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy.,Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, Russia
| | - Carel G M Meskers
- Amsterdam UMC, Department of Rehabilitation Medicine, Amsterdam Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Andrea B Maier
- Department of Human Movement Sciences, @AgeAmsterdam, Faculty of Behavioural and Movement Sciences, Amsterdam Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam, Netherlands.,Department of Medicine and Aged Care, @AgeMelbourne, The Royal Melbourne Hospital, The University of Melbourne, Melbourne, VIC, Australia
| | - Paolo Garagnani
- Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy.,Clinical Chemistry, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden.,Applied Biomedical Research Center (CRBA), Policlinico S.Orsola-Malpighi Polyclinic, Bologna, Italy.,CNR Institute of Molecular Genetics, Unit of Bologna, Bologna, Italy
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17
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Turan ZG, Parvizi P, Dönertaş HM, Tung J, Khaitovich P, Somel M. Molecular footprint of Medawar's mutation accumulation process in mammalian aging. Aging Cell 2019; 18:e12965. [PMID: 31062469 PMCID: PMC6612638 DOI: 10.1111/acel.12965] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 02/14/2019] [Accepted: 03/28/2019] [Indexed: 12/20/2022] Open
Abstract
Medawar's mutation accumulation hypothesis explains aging by the declining force of natural selection with age: Slightly deleterious germline mutations expressed in old age can drift to fixation and thereby lead to aging‐related phenotypes. Although widely cited, empirical evidence for this hypothesis has remained limited. Here, we test one of its predictions that genes relatively highly expressed in old adults should be under weaker purifying selection than genes relatively highly expressed in young adults. Combining 66 transcriptome datasets (including 16 tissues from five mammalian species) with sequence conservation estimates across mammals, here we report that the overall conservation level of expressed genes is lower at old age compared to young adulthood. This age‐related decrease in transcriptome conservation (ADICT) is systematically observed in diverse mammalian tissues, including the brain, liver, lung, and artery, but not in others, most notably in the muscle and heart. Where observed, ADICT is driven partly by poorly conserved genes being up‐regulated during aging. In general, the more often a gene is found up‐regulated with age among tissues and species, the lower its evolutionary conservation. Poorly conserved and up‐regulated genes have overlapping functional properties that include responses to age‐associated tissue damage, such as apoptosis and inflammation. Meanwhile, these genes do not appear to be under positive selection. Hence, genes contributing to old age phenotypes are found to harbor an excess of slightly deleterious alleles, at least in certain tissues. This supports the notion that genetic drift shapes aging in multicellular organisms, consistent with Medawar's mutation accumulation hypothesis.
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Affiliation(s)
- Zeliha Gözde Turan
- Department of Biological Sciences Middle East Technical University Ankara Turkey
| | - Poorya Parvizi
- Department of Biological Sciences Middle East Technical University Ankara Turkey
- Usher Institute of Population Health Sciences and Informatics University of Edinburgh Edinburgh UK
| | - Handan Melike Dönertaş
- European Molecular Biology Laboratory, European Bioinformatics Institute EMBL‐EBI Wellcome Trust Genome Campus Cambridge UK
| | - Jenny Tung
- Department of Evolutionary Anthropology Duke University Durham North Carolina
- Department of Biology Duke University Durham North Carolina
- Duke Population Research Institute Duke University Durham North Carolina
| | - Philipp Khaitovich
- Center for Neurobiology and Brain Restoration Skolkovo Institute of Science and Technology Moscow Russia
- CAS Key Laboratory of Computational Biology, CAS‐MPG Partner Institute for Computational Biology, Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai China
| | - Mehmet Somel
- Department of Biological Sciences Middle East Technical University Ankara Turkey
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18
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Kapitansky O, Gozes I. ADNP differentially interact with genes/proteins in correlation with aging: a novel marker for muscle aging. GeroScience 2019; 41:321-340. [PMID: 31264075 DOI: 10.1007/s11357-019-00079-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Accepted: 06/10/2019] [Indexed: 12/25/2022] Open
Abstract
Activity-dependent neuroprotective protein (ADNP) is essential for embryonic development with ADNP mutations leading to syndromic autism, coupled with intellectual disabilities and motor developmental delays. Here, mining human muscle gene-expression databases, we have investigated the association of ADNP transcripts with muscle aging. We discovered increased ADNP and its paralogue ADNP2 expression in the vastus lateralis muscle of aged compared to young subjects, as well as altered expression of the ADNP and the ADNP2 genes in bicep brachii muscle of elderly people, in a sex-dependent manner. Prolonged exercise resulted in decreased ADNP expression, and increased ADNP2 expression in an age-dependent manner in the vastus lateralis muscle. ADNP expression level was further correlated with 49 genes showing age-dependent changes in muscle transcript expression. A high degree of correlation with ADNP was discovered for 24 genes with the leading gene/protein being NMNAT1 (nicotinamide nucleotide adenylyl transferase 1). Looking at correlations differentiating the young and the old muscles and comparing protein interactions revealed an association of ADNP with the cell division cycle 5-like protein (CDC5L), and an aging-muscle-related interactive pathway in the vastus lateralis. In the bicep brachii, very high correlation was detected with genes associated with immune functions as well as mitochondrial structure and function among others. Taken together, the results suggest a direct association of ADNP with muscle strength and implicate ADNP fortification in the protection against age-associated muscle wasting.
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Affiliation(s)
- Oxana Kapitansky
- The Lily and Avraham Gildor Chair for the Investigation of Growth Factors; The Elton Laboratory for Neuroendocrinology; Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Sagol School of Neuroscience and Adams Super Center for Brain Studies, Tel Aviv University, 69978, Tel Aviv, Israel
| | - Illana Gozes
- The Lily and Avraham Gildor Chair for the Investigation of Growth Factors; The Elton Laboratory for Neuroendocrinology; Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Sagol School of Neuroscience and Adams Super Center for Brain Studies, Tel Aviv University, 69978, Tel Aviv, Israel.
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19
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Wessner B, Ploder M, Tschan H, Ferunaj P, Erindi A, Strasser EM, Bachl N. Effects of acute resistance exercise on proteolytic and myogenic markers in skeletal muscles of former weightlifters and age-matched sedentary controls. J Sports Med Phys Fitness 2019; 59:1915-1924. [PMID: 31219250 DOI: 10.23736/s0022-4707.19.09740-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
BACKGROUND Former athletes who continue a regular, performance-oriented training throughout life provide a unique model for studying successful aging. With this in mind, the current study aimed to compare the effects of an acute resistance exercise on proteolytic and myogenic markers in older weightlifters and untrained participants. METHODS Sixteen older men (8 former weightlifters, 8 age-matched untrained controls) with an age of 61.2±8.2 years volunteered to participate in the study. Two days after assessing 1-RM, an acute exercise protocol (3 sets, 70-75% of one-repetition maximum until voluntary fatigue) was applied unilaterally on the dominant leg while the other leg served as control. Three hours after termination of the exercise, skeletal muscle tissue was obtained from m. vastus lateralis of both legs. RESULTS Acute resistance exercise led to an up-regulation (>1.5-fold) of 14 genes in controls and of 13 genes in weightlifters. The transcription factors FOS and early growth response 1 (EGR1), as well as the E3 protein ligase TRIM63 comprised the most responsive genes to resistance exercise (EGR1:15.7-fold increase, P=0.003, FOS: 36.3-fold increase, P<0.001; TRIM63: 2.9-fold increase, P<0.001). In addition, myostatin levels were decreased in the exercised leg (0.6-fold, P<0.001). FOXO3 gene expression was significantly higher in weightlifters than in untrained controls (1.5-fold, P=0.042). CONCLUSIONS Trained and untrained older adults respond to an acute bout of resistance exercise in a very similar way irrespective of training status, although some differences exist in FOXO3, potentially reflecting the superior capacity of trained persons in regulating cellular homeostasis.
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Affiliation(s)
- Barbara Wessner
- Center for Sport Science and University Sports, University of Vienna, Vienna, Austria -
| | - Martin Ploder
- Danube Hospital, Social Medical Center East, Vienna, Austria
| | - Harald Tschan
- Center for Sport Science and University Sports, University of Vienna, Vienna, Austria
| | | | | | - Eva-Maria Strasser
- Karl Landsteiner Institute for Remobilization and Functional Health/Institute for Physical Medicine and Rehabilitation, Kaiser Franz Joseph Hospital, Social Medical Center South, Vienna, Austria
| | - Norbert Bachl
- Center for Sport Science and University Sports, University of Vienna, Vienna, Austria.,Austrian Institute for Sports Medicine, Vienna, Austria
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20
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Shafiee G, Asgari Y, Soltani A, Larijani B, Heshmat R. Identification of candidate genes and proteins in aging skeletal muscle (sarcopenia) using gene expression and structural analysis. PeerJ 2018; 6:e5239. [PMID: 30202641 PMCID: PMC6129146 DOI: 10.7717/peerj.5239] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 06/24/2018] [Indexed: 12/25/2022] Open
Abstract
Sarcopenia is an age-related disease characterized by the loss of muscle mass and muscle function. A proper understanding of its pathogenesis and mechanisms may lead to new strategies for diagnosis and treatment of the disease. This study aims to discover the underlying genes, proteins, and pathways associated with sarcopenia in both genders. Integrated analysis of microarray datasets has been performed to identify differentially expressed genes (DEGs) between old and young skeletal muscles. Gene Ontology (GO) enrichment analysis and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis were then performed to uncover the functions of the DEGs. Moreover, a protein-protein interaction (PPI) network was constructed based on the DEGs. We have identified 41,715 DEGs, including 19 downregulated and 41,696 upregulated ones, in men. Among women, 3,015 DEGs have been found, with 2,874 of them being upregulated and 141 downregulated genes. Among the top up-regulated and downregulated genes, the ribosome biogenesis genes and genes involved in lipid storage may be closely related to aging muscles in men and women respectively. Also, the DEGs were enriched in the pathways including those of ribosome and Peroxisome proliferator-activated receptor (PPAR) in men and women, respectively. In the PPI network, Neurotrophic Receptor Tyrosine Kinase 1 (NTRK1), Cullin 3 (CUL3) and P53 have been identified as significant hub proteins in both genders. Using the integrated analysis of multiple gene expression profiles, we propose that the ribosome biogenesis genes and those involved in lipid storage would be promising markers for sarcopenia in men and women, respectively. In the reconstructed PPI network, neurotrophic factors expressed in skeletal muscle are essential for motoneuron survival and muscle fiber innervation during development. Cullin E3 ubiquitin ligase (Cul3) is an important component of the ubiquitin-proteasome system-it regulates the proteolysis. P53 is recognized as a central regulator of the cell cycle and apoptosis. These proteins, which have been identified as the most significant hubs, may be involved in aging muscle and sarcopenia.
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Affiliation(s)
- Gita Shafiee
- Chronic Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Yazdan Asgari
- Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Akbar Soltani
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Bagher Larijani
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Ramin Heshmat
- Chronic Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
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21
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Mamoshina P, Volosnikova M, Ozerov IV, Putin E, Skibina E, Cortese F, Zhavoronkov A. Machine Learning on Human Muscle Transcriptomic Data for Biomarker Discovery and Tissue-Specific Drug Target Identification. Front Genet 2018; 9:242. [PMID: 30050560 PMCID: PMC6052089 DOI: 10.3389/fgene.2018.00242] [Citation(s) in RCA: 100] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 06/19/2018] [Indexed: 12/17/2022] Open
Abstract
For the past several decades, research in understanding the molecular basis of human muscle aging has progressed significantly. However, the development of accessible tissue-specific biomarkers of human muscle aging that may be measured to evaluate the effectiveness of therapeutic interventions is still a major challenge. Here we present a method for tracking age-related changes of human skeletal muscle. We analyzed publicly available gene expression profiles of young and old tissue from healthy donors. Differential gene expression and pathway analysis were performed to compare signatures of young and old muscle tissue and to preprocess the resulting data for a set of machine learning algorithms. Our study confirms the established mechanisms of human skeletal muscle aging, including dysregulation of cytosolic Ca2+ homeostasis, PPAR signaling and neurotransmitter recycling along with IGFR and PI3K-Akt-mTOR signaling. Applying several supervised machine learning techniques, including neural networks, we built a panel of tissue-specific biomarkers of aging. Our predictive model achieved 0.91 Pearson correlation with respect to the actual age values of the muscle tissue samples, and a mean absolute error of 6.19 years on the test set. The performance of models was also evaluated on gene expression samples of the skeletal muscles from the Gene expression Genotype-Tissue Expression (GTEx) project. The best model achieved the accuracy of 0.80 with respect to the actual age bin prediction on the external validation set. Furthermore, we demonstrated that aging biomarkers can be used to identify new molecular targets for tissue-specific anti-aging therapies.
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Affiliation(s)
- Polina Mamoshina
- Pharmaceutical Artificial Intelligence Department, Insilico Medicine, Inc., Baltimore, MD, United States.,Department of Computer Science, University of Oxford, Oxford, United Kingdom
| | - Marina Volosnikova
- Pharmaceutical Artificial Intelligence Department, Insilico Medicine, Inc., Baltimore, MD, United States
| | - Ivan V Ozerov
- Pharmaceutical Artificial Intelligence Department, Insilico Medicine, Inc., Baltimore, MD, United States
| | - Evgeny Putin
- Pharmaceutical Artificial Intelligence Department, Insilico Medicine, Inc., Baltimore, MD, United States.,Computer Technologies Lab, Saint Petersburg State University of Information Technologies, Mechanics and Optics, Saint Petersburg, Russia
| | - Ekaterina Skibina
- Pharmaceutical Artificial Intelligence Department, Insilico Medicine, Inc., Baltimore, MD, United States
| | - Franco Cortese
- Biogerontology Research Foundation, London, United Kingdom
| | - Alex Zhavoronkov
- Pharmaceutical Artificial Intelligence Department, Insilico Medicine, Inc., Baltimore, MD, United States.,Biogerontology Research Foundation, London, United Kingdom.,Buck Institute for Research on Aging, Novato, CA, United States
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22
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Garcia S, Nissanka N, Mareco EA, Rossi S, Peralta S, Diaz F, Rotundo RL, Carvalho RF, Moraes CT. Overexpression of PGC-1α in aging muscle enhances a subset of young-like molecular patterns. Aging Cell 2018; 17. [PMID: 29427317 PMCID: PMC5847875 DOI: 10.1111/acel.12707] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/31/2017] [Indexed: 12/31/2022] Open
Abstract
PGC‐1α is a transcriptional co‐activator known as the master regulator of mitochondrial biogenesis. Its control of metabolism has been suggested to exert critical influence in the aging process. We have aged mice overexpressing PGC‐1α in skeletal muscle to determine whether the transcriptional changes reflected a pattern of expression observed in younger muscle. Analyses of muscle proteins showed that Pax7 and several autophagy markers were increased. In general, the steady‐state levels of several muscle proteins resembled that of muscle from young mice. Age‐related mtDNA deletion levels were not increased by the PGC‐1α‐associated increase in mitochondrial biogenesis. Accordingly, age‐related changes in the neuromuscular junction were minimized by PGC‐1α overexpression. RNA‐Seq showed that several genes overexpressed in the aged PGC‐1α transgenic are expressed at higher levels in young when compared to aged skeletal muscle. As expected, there was increased expression of genes associated with energy metabolism but also of pathways associated with muscle integrity and regeneration. We also found that PGC‐1α overexpression had a mild but significant effect on longevity. Taken together, overexpression of PGC‐1α in aged muscle led to molecular changes that resemble the patterns observed in skeletal muscle from younger mice.
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Affiliation(s)
- Sofia Garcia
- Department of Neurology; University of Miami Miller School of Medicine; Miami FL USA
| | - Nadee Nissanka
- Neuroscience Graduate Program; University of Miami Miller School of Medicine; Miami FL USA
| | - Edson A. Mareco
- Graduate Program in Environment and Regional Development; University of Western São Paulo; Presidente Prudente Brazil
| | - Susana Rossi
- Department of Cell Biology; University of Miami Miller School of Medicine; Miami FL USA
| | - Susana Peralta
- Department of Neurology; University of Miami Miller School of Medicine; Miami FL USA
| | - Francisca Diaz
- Department of Neurology; University of Miami Miller School of Medicine; Miami FL USA
| | - Richard L. Rotundo
- Neuroscience Graduate Program; University of Miami Miller School of Medicine; Miami FL USA
- Department of Cell Biology; University of Miami Miller School of Medicine; Miami FL USA
| | - Robson F. Carvalho
- Institute of Biosciences; São Paulo State University (UNESP); Botucatu Brazil
| | - Carlos T. Moraes
- Department of Neurology; University of Miami Miller School of Medicine; Miami FL USA
- Neuroscience Graduate Program; University of Miami Miller School of Medicine; Miami FL USA
- Department of Cell Biology; University of Miami Miller School of Medicine; Miami FL USA
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23
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Pegoraro V, Merico A, Angelini C. Micro-RNAs in ALS muscle: Differences in gender, age at onset and disease duration. J Neurol Sci 2017; 380:58-63. [PMID: 28870590 PMCID: PMC5598142 DOI: 10.1016/j.jns.2017.07.008] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 07/04/2017] [Accepted: 07/05/2017] [Indexed: 11/25/2022]
Abstract
Few studies have explored the role of microRNAs (or miRNAs) in Amyotrophic Lateral Sclerosis (ALS) muscle, possibly because of the difficulty in obtaining samples and because this is a rare disease. We measured the expression levels of muscle-specific miRNAs (miRNA-1, miRNA-206, miRNA-133a, miRNA-133b, miRNA-27a) and inflammatory/angiogenic miRNAs (miRNA-155, miRNA-146a, miRNA-221, miRNA-149*) in the muscles of 13 ALS patients and controls. To highlight differences, patients were subdivided according to their gender, age at onset of symptoms, and disease duration. A significant over-expression of all miRNAs was observed in ALS patients versus controls, in male patients versus females, in patients with early onset versus patients with late onset, and in patients with long disease duration versus patients with short duration. A differential expression of miRNAs according to gender could be explained by the hormonal regulation which determines the body muscle mass. The course of the disease might reflect differential degree of muscle atrophy and signaling at miRNA levels. An evident role is also played by inflammatory/angiogenetic factors as shown by the observed miRNA changes. MyomiRNAs (especially miRNA-206) are up-regulated in ALS muscle than in controls. Inflammatory miRNA-(especially miRNA-221) is up-regulated in ALS than in controls. There is gender difference in expression of myo-miRNAs and inflammatory miRNAs. MiRNAs levels differ according to age at onset and disease duration.
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Affiliation(s)
| | - Antonio Merico
- Fondazione San Camillo Hospital IRCCS, Lido Venice, Italy
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24
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Williams JK, Dean A, Lankford S, Criswell T, Badlani G, Andersson KE. Determinates of muscle precursor cell therapy efficacy in a nonhuman primate model of intrinsic urinary sphincter deficiency. Stem Cell Res Ther 2017; 8:1. [PMID: 28057078 PMCID: PMC5217333 DOI: 10.1186/s13287-016-0461-6] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 11/21/2016] [Accepted: 12/17/2016] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Cell therapy for intrinsic urinary sphincter deficiency (ISD) in women has been moderately effective, and improvements are needed. To improve treatment efficacy, it is important to better understand determinates of cell efficacy in the different patient cohorts. We have reported that in nonhuman primates the chronicity of ISD may affect cell efficacy, but additional factors (age, psychosocial stress, hormone status, body weight) can be associated with many disease/treatment outcomes in women - and these factors are the focus of this study. METHODS Adult female cynomolgus monkeys were divided into groups: (1) younger (n = 10, 5-8 years of age) versus older (n = 10, 13-18 years of age); (2) age-matched/socially subordinate (n = 15) versus socially dominant (n = 15); and (3) age-matched lower body weight (n = 6) versus higher body weight (n = 6). Autologous skeletal muscle precursor cells (skMPCs, 5 million) were injected into the urinary sphincter 6 weeks after a surgically induced ISD procedure. Resting and pudendal nerve-stimulated maximal urethral pressures (MUP) were measured before, and 3 and 6 months post-skMPC treatment and urinary sphincter muscle/collagen content within the sphincter complex was measured by quantitative histology 6 months posttreatment. RESULTS Efficacy of skMPCs on MUP and sphincter muscle/collagen ratios are affected by age (average 40% reduction in efficacy, p < 0.05 vs. younger NHPs), social stress (average 30% reduction in efficacy, p < 0.05 vs. socially dominant) and body weight/fasting glucose concentrations (average 35% reduction in efficacy, p < 0.05 vs. lower body weight). CONCLUSION Multiple factors (age, stress-induced dysmenorrhea, and body weight) affect the efficacy of cell therapy to restore structure and function in the urinary sphincter complex in NHPs with ISD. Consideration of, and alternatives for, these patient cohorts should be considered.
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Affiliation(s)
- James Koudy Williams
- Wake Forest Institute for Regenerative Medicine, Wake Forest Baptist Medical Center, Winston-Salem, NC, USA. .,Wake Forest Institute for Regenerative Medicine, Wake Forest University, 391 Technology Way, Winston-Salem, North Carolina, 27101, USA.
| | - Ashley Dean
- Wake Forest Institute for Regenerative Medicine, Wake Forest Baptist Medical Center, Winston-Salem, NC, USA
| | - Shannon Lankford
- Wake Forest Institute for Regenerative Medicine, Wake Forest Baptist Medical Center, Winston-Salem, NC, USA
| | - Tracy Criswell
- Wake Forest Institute for Regenerative Medicine, Wake Forest Baptist Medical Center, Winston-Salem, NC, USA
| | - Gopal Badlani
- Department of Urology, Wake Forest University Baptist Medical Center, Winston-Salem, NC, 27157, USA
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25
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Solovyov IA, Dobrovol’skaya EV, Moskalev AA. Genetic control of circadian rhythms and aging. RUSS J GENET+ 2016. [DOI: 10.1134/s1022795416040104] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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26
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Carter HN, Chen CCW, Hood DA. Mitochondria, muscle health, and exercise with advancing age. Physiology (Bethesda) 2016; 30:208-23. [PMID: 25933821 DOI: 10.1152/physiol.00039.2014] [Citation(s) in RCA: 105] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Skeletal muscle health is dependent on the optimal function of its mitochondria. With advancing age, decrements in numerous mitochondrial variables are evident in muscle. Part of this decline is due to reduced physical activity, whereas the remainder appears to be attributed to age-related alterations in mitochondrial synthesis and degradation. Exercise is an important strategy to stimulate mitochondrial adaptations in older individuals to foster improvements in muscle function and quality of life.
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Affiliation(s)
- Heather N Carter
- Muscle Health Research Centre, School of Kinesiology and Health Science, York University, Toronto, Ontario, Canada
| | - Chris C W Chen
- Muscle Health Research Centre, School of Kinesiology and Health Science, York University, Toronto, Ontario, Canada
| | - David A Hood
- Muscle Health Research Centre, School of Kinesiology and Health Science, York University, Toronto, Ontario, Canada
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27
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Brook MS, Wilkinson DJ, Phillips BE, Perez-Schindler J, Philp A, Smith K, Atherton PJ. Skeletal muscle homeostasis and plasticity in youth and ageing: impact of nutrition and exercise. Acta Physiol (Oxf) 2016; 216:15-41. [PMID: 26010896 PMCID: PMC4843955 DOI: 10.1111/apha.12532] [Citation(s) in RCA: 100] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Revised: 11/10/2014] [Accepted: 05/18/2015] [Indexed: 12/18/2022]
Abstract
Skeletal muscles comprise a substantial portion of whole body mass and are integral for locomotion and metabolic health. Increasing age is associated with declines in both muscle mass and function (e.g. strength‐related performance, power) with declines in muscle function quantitatively outweighing those in muscle volume. The mechanisms behind these declines are multi‐faceted involving both intrinsic age‐related metabolic dysregulation and environmental influences such as nutritional and physical activity. Ageing is associated with a degree of ‘anabolic resistance’ to these key environmental inputs, which likely accelerates the intrinsic processes driving ageing. On this basis, strategies to sensitize and/or promote anabolic responses to nutrition and physical activity are likely to be imperative in alleviating the progression and trajectory of sarcopenia. Both resistance‐ and aerobic‐type exercises are likely to confer functional and health benefits in older age, and a clutch of research suggests that enhancement of anabolic responsiveness to exercise and/or nutrition may be achieved by optimizing modifications of muscle‐loading paradigms (workload, volume, blood flow restriction) or nutritional support (e.g. essential amino acid/leucine) patterns. Nonetheless, more work is needed in which a more holistic view in ageing studies is taken into account. This should include improved characterization of older study recruits, that is physical activity/nutritional behaviours, to limit confounding variables influencing whether findings are attributable to age, or other environmental influences. Nonetheless, on balance, ageing is associated with declines in muscle mass and function and a partially related decline in aerobic capacity. There is also good evidence that metabolic flexibility is impaired in older age.
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Affiliation(s)
- M. S. Brook
- MRC-ARUK Centre of Excellence for Musculoskeletal Ageing Research, Clinical Metabolic and Molecular Physiology; University of Nottingham; Royal Derby Hospital Centre; Derby UK
| | - D. J. Wilkinson
- MRC-ARUK Centre of Excellence for Musculoskeletal Ageing Research, Clinical Metabolic and Molecular Physiology; University of Nottingham; Royal Derby Hospital Centre; Derby UK
| | - B. E. Phillips
- MRC-ARUK Centre of Excellence for Musculoskeletal Ageing Research, Clinical Metabolic and Molecular Physiology; University of Nottingham; Royal Derby Hospital Centre; Derby UK
| | - J. Perez-Schindler
- MRC-ARUK Centre of Excellence for Musculoskeletal Ageing Research, School of Sport, Exercise and Rehabilitation Sciences; University of Birmingham; Birmingham UK
| | - A. Philp
- MRC-ARUK Centre of Excellence for Musculoskeletal Ageing Research, School of Sport, Exercise and Rehabilitation Sciences; University of Birmingham; Birmingham UK
| | - K. Smith
- MRC-ARUK Centre of Excellence for Musculoskeletal Ageing Research, Clinical Metabolic and Molecular Physiology; University of Nottingham; Royal Derby Hospital Centre; Derby UK
| | - P. J. Atherton
- MRC-ARUK Centre of Excellence for Musculoskeletal Ageing Research, Clinical Metabolic and Molecular Physiology; University of Nottingham; Royal Derby Hospital Centre; Derby UK
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28
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de Rooy C, Grossmann M, Zajac JD, Cheung AS. Targeting muscle signaling pathways to minimize adverse effects of androgen deprivation. Endocr Relat Cancer 2016; 23:R15-26. [PMID: 26432470 DOI: 10.1530/erc-15-0232] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/02/2015] [Indexed: 01/05/2023]
Abstract
Androgen deprivation therapy (ADT) is a highly effective treatment used in ∼30% of men with prostate cancer. Adverse effects of ADT on muscle are significant with consistent losses in muscle mass. However, effects of ADT on muscle strength and physical function, of most relevance to the patient, are less well understood. This is in part due to the fact that muscle effects of ADT at the cellular, genetic and protein level, critical to the understanding of the pathophysiology of sarcopenia, have come into focus only recently. This review highlights the complexity of androgen-dependent signaling in muscle with an emphasis on recent findings in the regulation of muscle growth and muscle atrophy pathways. Furthermore, the effects of ADT and testosterone on skeletal muscle histology, gene expression and protein transcription are discussed. A better mechanistic understanding of the regulation of muscle mass and function by androgens should not only pave the way for developing targeted promyogenic interventions for men with prostate cancer receiving ADT but also may have wider implications for age-associated sarcopenia in the general population.
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Affiliation(s)
- Casey de Rooy
- Department of MedicineUniversity of Melbourne, Heidelberg, Victoria, AustraliaDepartment of EndocrinologyAustin Health, Studley Road Heidelberg, Victoria, 3084, Australia
| | - Mathis Grossmann
- Department of MedicineUniversity of Melbourne, Heidelberg, Victoria, AustraliaDepartment of EndocrinologyAustin Health, Studley Road Heidelberg, Victoria, 3084, Australia Department of MedicineUniversity of Melbourne, Heidelberg, Victoria, AustraliaDepartment of EndocrinologyAustin Health, Studley Road Heidelberg, Victoria, 3084, Australia
| | - Jeffrey D Zajac
- Department of MedicineUniversity of Melbourne, Heidelberg, Victoria, AustraliaDepartment of EndocrinologyAustin Health, Studley Road Heidelberg, Victoria, 3084, Australia Department of MedicineUniversity of Melbourne, Heidelberg, Victoria, AustraliaDepartment of EndocrinologyAustin Health, Studley Road Heidelberg, Victoria, 3084, Australia
| | - Ada S Cheung
- Department of MedicineUniversity of Melbourne, Heidelberg, Victoria, AustraliaDepartment of EndocrinologyAustin Health, Studley Road Heidelberg, Victoria, 3084, Australia Department of MedicineUniversity of Melbourne, Heidelberg, Victoria, AustraliaDepartment of EndocrinologyAustin Health, Studley Road Heidelberg, Victoria, 3084, Australia
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29
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Sood S, Gallagher IJ, Lunnon K, Rullman E, Keohane A, Crossland H, Phillips BE, Cederholm T, Jensen T, van Loon LJC, Lannfelt L, Kraus WE, Atherton PJ, Howard R, Gustafsson T, Hodges A, Timmons JA. A novel multi-tissue RNA diagnostic of healthy ageing relates to cognitive health status. Genome Biol 2015; 16:185. [PMID: 26343147 PMCID: PMC4561473 DOI: 10.1186/s13059-015-0750-x] [Citation(s) in RCA: 146] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Accepted: 08/12/2015] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Diagnostics of the human ageing process may help predict future healthcare needs or guide preventative measures for tackling diseases of older age. We take a transcriptomics approach to build the first reproducible multi-tissue RNA expression signature by gene-chip profiling tissue from sedentary normal subjects who reached 65 years of age in good health. RESULTS One hundred and fifty probe-sets form an accurate classifier of young versus older muscle tissue and this healthy ageing RNA classifier performed consistently in independent cohorts of human muscle, skin and brain tissue (n = 594, AUC = 0.83-0.96) and thus represents a biomarker for biological age. Using the Uppsala Longitudinal Study of Adult Men birth-cohort (n = 108) we demonstrate that the RNA classifier is insensitive to confounding lifestyle biomarkers, while greater gene score at age 70 years is independently associated with better renal function at age 82 years and longevity. The gene score is 'up-regulated' in healthy human hippocampus with age, and when applied to blood RNA profiles from two large independent age-matched dementia case-control data sets (n = 717) the healthy controls have significantly greater gene scores than those with cognitive impairment. Alone, or when combined with our previously described prototype Alzheimer disease (AD) RNA 'disease signature', the healthy ageing RNA classifier is diagnostic for AD. CONCLUSIONS We identify a novel and statistically robust multi-tissue RNA signature of human healthy ageing that can act as a diagnostic of future health, using only a peripheral blood sample. This RNA signature has great potential to assist research aimed at finding treatments for and/or management of AD and other ageing-related conditions.
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Affiliation(s)
- Sanjana Sood
- XRGenomics Ltd, London, UK
- Division of Genetics & Molecular Medicine, King's College London, 8th Floor, Tower Wing, Guy's Hospital, London, SE1 9RT, UK
| | - Iain J Gallagher
- XRGenomics Ltd, London, UK
- School of Health, Stirling University, Stirling, Scotland, UK
| | - Katie Lunnon
- Department of Old Age Psychiatry, King's College London, London, UK
- Present address: University of Exeter Medical School, Exeter, UK
| | - Eric Rullman
- Division of Clinical Physiology, Karolinska University Hospital, Stockholm, Sweden
| | - Aoife Keohane
- Department of Old Age Psychiatry, King's College London, London, UK
| | - Hannah Crossland
- Division of Genetics & Molecular Medicine, King's College London, 8th Floor, Tower Wing, Guy's Hospital, London, SE1 9RT, UK
- School of Medicine, Derby Royal Hospital, Derbyshire, UK
| | | | - Tommy Cederholm
- Department of Public Health, Caring Sciences, Clinical Nutrition and Metabolism, Uppsala University, Uppsala, Sweden
| | | | | | - Lars Lannfelt
- Department of Public Health and Caring Sciences/Molecular Geriatrics, Uppsala University, Uppsala, Sweden
| | - William E Kraus
- Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, NC, USA
| | | | - Robert Howard
- Department of Old Age Psychiatry, King's College London, London, UK
| | - Thomas Gustafsson
- Division of Clinical Physiology, Karolinska University Hospital, Stockholm, Sweden
| | - Angela Hodges
- Department of Old Age Psychiatry, King's College London, London, UK
| | - James A Timmons
- XRGenomics Ltd, London, UK.
- Division of Genetics & Molecular Medicine, King's College London, 8th Floor, Tower Wing, Guy's Hospital, London, SE1 9RT, UK.
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30
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Thorley M, Malatras A, Duddy W, Le Gall L, Mouly V, Butler Browne G, Duguez S. Changes in Communication between Muscle Stem Cells and their Environment with Aging. J Neuromuscul Dis 2015; 2:205-217. [PMID: 27858742 PMCID: PMC5240546 DOI: 10.3233/jnd-150097] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Aging is associated with both muscle weakness and a loss of muscle mass, contributing towards overall frailty in the elderly. Aging skeletal muscle is also characterised by a decreasing efficiency in repair and regeneration, together with a decline in the number of adult stem cells. Commensurate with this are general changes in whole body endocrine signalling, in local muscle secretory environment, as well as in intrinsic properties of the stem cells themselves. The present review discusses the various mechanisms that may be implicated in these age-associated changes, focusing on aspects of cell-cell communication and long-distance signalling factors, such as levels of circulating growth hormone, IL-6, IGF1, sex hormones, and inflammatory cytokines. Changes in the local environment are also discussed, implicating IL-6, IL-4, FGF-2, as well as other myokines, and processes that lead to thickening of the extra-cellular matrix. These factors, involved primarily in communication, can also modulate the intrinsic properties of muscle stem cells, including reduced DNA accessibility and repression of specific genes by methylation. Finally we discuss the decrease in the stem cell pool, particularly the failure of elderly myoblasts to re-quiesce after activation, and the consequences of all these changes on general muscle homeostasis.
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Affiliation(s)
- Matthew Thorley
- Sorbonne Universités, UPMC Univ Paris 06, Center of Research in Myology UMRS 974, F-75013, Paris, France.,INSERM UMRS 974, F-75013, Paris, France.,CNRS FRE 3617, F-75013, Paris, France.,Institut de Myologie, F-75013, Paris, France
| | - Apostolos Malatras
- Sorbonne Universités, UPMC Univ Paris 06, Center of Research in Myology UMRS 974, F-75013, Paris, France.,INSERM UMRS 974, F-75013, Paris, France.,CNRS FRE 3617, F-75013, Paris, France.,Institut de Myologie, F-75013, Paris, France
| | - William Duddy
- Sorbonne Universités, UPMC Univ Paris 06, Center of Research in Myology UMRS 974, F-75013, Paris, France.,INSERM UMRS 974, F-75013, Paris, France.,CNRS FRE 3617, F-75013, Paris, France.,Institut de Myologie, F-75013, Paris, France
| | - Laura Le Gall
- Sorbonne Universités, UPMC Univ Paris 06, Center of Research in Myology UMRS 974, F-75013, Paris, France.,INSERM UMRS 974, F-75013, Paris, France.,CNRS FRE 3617, F-75013, Paris, France.,Institut de Myologie, F-75013, Paris, France
| | - Vincent Mouly
- Sorbonne Universités, UPMC Univ Paris 06, Center of Research in Myology UMRS 974, F-75013, Paris, France.,INSERM UMRS 974, F-75013, Paris, France.,CNRS FRE 3617, F-75013, Paris, France.,Institut de Myologie, F-75013, Paris, France
| | - Gillian Butler Browne
- Sorbonne Universités, UPMC Univ Paris 06, Center of Research in Myology UMRS 974, F-75013, Paris, France.,CNRS FRE 3617, F-75013, Paris, France.,INSERM UMRS 974, F-75013, Paris, France.,CNRS FRE 3617, F-75013, Paris, France.,Institut de Myologie, F-75013, Paris, France
| | - Stéphanie Duguez
- Sorbonne Universités, UPMC Univ Paris 06, Center of Research in Myology UMRS 974, F-75013, Paris, France.,INSERM UMRS 974, F-75013, Paris, France.,CNRS FRE 3617, F-75013, Paris, France.,Institut de Myologie, F-75013, Paris, France
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31
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Fearing CM, Melton DW, Lei X, Hancock H, Wang H, Sarwar ZU, Porter L, McHale M, McManus LM, Shireman PK. Increased Adipocyte Area in Injured Muscle With Aging and Impaired Remodeling in Female Mice. J Gerontol A Biol Sci Med Sci 2015; 71:992-1004. [PMID: 26273023 DOI: 10.1093/gerona/glv104] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Accepted: 06/15/2015] [Indexed: 12/30/2022] Open
Abstract
We demonstrated that young male and female mice similarly regenerated injured skeletal muscle; however, female mice transiently increased adipocyte area within regenerated muscle in a sex hormone-dependent manner. We extended these observations to investigate the effect of aging and sex on sarcopenia and muscle regeneration. Cardiotoxin injury to the tibialis anterior muscle of young, middle, and old-aged C57Bl/6J male and female mice was used to measure regenerated myofiber cross-sectional area (CSA), adipocyte area, residual necrosis, and inflammatory cell recruitment. Baseline (uninjured) myofiber CSA was decreased in old mice of both sexes compared to young and middle-aged mice. Regenerated CSA was similar in male mice in all age groups until baseline CSA was attained but decreased in middle and old age female mice compared to young females. Furthermore, adipocyte area within regenerated muscle was transiently increased in young females compared to young males and these sex-dependent increases persisted in middle and old age female mice and were associated with increased Pparg Young female mice had more pro-inflammatory monocytes/macrophages in regenerating muscle than young male mice and increased Sca-1(+)CD45(-)cells. In conclusion, sex and age influence pro-inflammatory cell recruitment, muscle regeneration, and adipocyte area following skeletal muscle injury.
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Affiliation(s)
| | - David W Melton
- Department of Surgery, Department of Cellular and Structural Biology, Sam and Ann Barshop Institute for Longevity and Aging Studies
| | | | | | | | | | | | | | - Linda M McManus
- Sam and Ann Barshop Institute for Longevity and Aging Studies, Department of Pathology, and Department of Periodontics, University of Texas Health Science Center, San Antonio
| | - Paula K Shireman
- Department of Surgery, Sam and Ann Barshop Institute for Longevity and Aging Studies, The South Texas Veterans Health Care System, San Antonio.
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32
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Park MS, Choi JS, Lee W, Yang YJ, Kim J, Lee GJ, Kim SS, Park SH, Kim SC, Choi JW. Pharmacogenomic analysis indicates potential of 1,5-isoquinolinediol as a universal anti-aging agent for different tissues. Oncotarget 2015; 6:17251-60. [PMID: 25980498 PMCID: PMC4627305 DOI: 10.18632/oncotarget.3949] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2015] [Accepted: 04/08/2015] [Indexed: 01/17/2023] Open
Abstract
The natural aging of multicellular organisms is marked by a progressive decline in the function of cells and tissues. The accumulation of senescent cells in tissues seems to eventually cause aging of the host. Nevertheless, gene expression that influences aging is unlikely to be conserved between tissues, and age-related loss of function seems to depend on a variety of mechanisms. This is a concern when developing anti-aging drugs in geriatric clinical pharmacology. We have sought a universal agent to redundantly cover gene expression despite the variation in differentially expressed genes between tissues. Using a minimally modified connectivity map, the poly (ADP-ribose) polymerase (PARP) inhibitor 1,5-isoquinolinediol was selected as a potent candidate, simultaneously applicable to various tissues. This choice was validated in vitro. Treatment of murine embryonic fibroblasts with 1,5-isoquinolinediol appeared to efficiently suppress the rate of replicative senescence at a concentration of 0.1 µM without resulting in cell death. The appearance of abnormal nuclei and accumulation of β-galactosidase in the cytoplasm were inhibited by daily treatment with the agent. When the aging process was accelerated by hydroxyurea-induced oxidative stress, the effect was even more noticeable. Thus, 1,5-isoquinolinediol may potentially be developed as an agent to prolong life.
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Affiliation(s)
- Mi Sung Park
- Institute for Metabolic Disease, School of Medicine, Wonkwang University, Iksan, Jeonbuk, South Korea
| | - Joon-Seok Choi
- College of Pharmacy, Catholic University of Daegu, Gyeongbuk, South Korea
| | - Wan Lee
- Department of Oral and Maxillofacial Radiology, College of Dentistry, Wonkwang University, Jeonbuk, South Korea
| | - Yoon Jung Yang
- Wonkwang Institute of Integrative Biomedical Science and Dental Research Institute, School of Dentistry, Wonkwang University, Iksan, Chonbuk, South Korea
| | - Juhee Kim
- Wonkwang Institute of Integrative Biomedical Science and Dental Research Institute, School of Dentistry, Wonkwang University, Iksan, Chonbuk, South Korea
| | - Gun-Joo Lee
- Wonkwang Institute of Integrative Biomedical Science and Dental Research Institute, School of Dentistry, Wonkwang University, Iksan, Chonbuk, South Korea
| | - Sang Soo Kim
- Jaesaeng Hospital, Biomedical Research Institute, Seongnam, Gyenggi-do, South Korea
| | - Seong Hoon Park
- Institute for Metabolic Disease, School of Medicine, Wonkwang University, Iksan, Jeonbuk, South Korea
- Division of Cardiothoracic Radiology, Department of Radiology, School Of Medicine, Wonkwang University, Iksan, Jeonbuk, South Korea
| | - Sung Chul Kim
- Department of Acupuncture and Moxibustion, Wonkwang University Oriental Medical Hospital, Gwangju, South Korea
| | - Jin Woo Choi
- Wonkwang Institute of Integrative Biomedical Science and Dental Research Institute, School of Dentistry, Wonkwang University, Iksan, Chonbuk, South Korea
- Advanced Institute of Convergence Technology, Seoul National University, Suwon, Gyenggi-do, South Korea
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Abstract
OBJECTIVE Major depressive disorder (MDD) is a common mood disorder associated with several psychophysiological changes like disturbances of sleep, appetite, or sexual desire, and it affects the patients' life seriously. We aimed to explore a genetic method to investigate the mechanism of MDD. METHODS The mRNA expression profile (GSE53987) of MDD was downloaded from Gene Expression Omnibus database, including 105 samples of three brain regions in post-mortem tissue suffered from MDD and unaffected controls. Differentially expressed genes (DEGs) in MDD were identified using the Limma package in R. Gene Ontology functions and Kyoto Enrichment of Genes and Genomes pathways of the selected DEGs were enriched using Database for Annotation, Visualization and Integrated Discovery. Protein-protein interactive network of DEGs was constructed using the Cytoscape software. RESULTS Totally, 241 DEGs in MDD-hip group, 218 DEGs in MDD-pfc group, and 327 DEGs in MDD-str group were identified. Also, different kinds of biological processes of DEGs in each group were enriched. Besides, glycan biosynthesis of DEGs in MDD-str group, RIG-I-like receptor signaling and pyrimidine metabolism of DEGs in the MDD-hip group were enriched, respectively. Moreover, several DEGs like PTK2, TDG and CETN2 in MDD-str group, DCT, AR and GNRHR in MDD-pfc group, and AKT1 and IRAK1 in MDD-hip group were selected from PPI network. CONCLUSION Our data suggests that the brain striatum tissue may be greatly affected by MDD, and DEGs like PTK2, GALNT2 and GALNT2 in striatum, AR in prefrontal cortex and IRAK1 and IL12A in hippocampus may provide novel therapeutic basis for MDD treatment.
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Affiliation(s)
- Lishu Gao
- Department of Clinical Psychology, Hangzhou First People's Hospital, Hangzhou, Zhejiang, PR China
| | - Yue Gao
- Department of Gerontology, Hangzhou First People's Hospital, Hangzhou, Zhejiang, PR China
| | - Enping Xu
- Department of Pathology, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, PR China
| | - Jian Xie
- Department of Clinical Psychology, Hangzhou First People's Hospital, Hangzhou, Zhejiang, PR China
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Coble J, Schilder RJ, Berg A, Drummond MJ, Rasmussen BB, Kimball SR. Influence of ageing and essential amino acids on quantitative patterns of troponin T alternative splicing in human skeletal muscle. Appl Physiol Nutr Metab 2015. [PMID: 26201856 DOI: 10.1139/apnm-2014-0568] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Ageing is associated with a loss of skeletal muscle performance, a condition referred to as sarcopenia. In part, the age-related reduction in performance is due to a selective loss of muscle fiber mass, but mass-independent effects have also been demonstrated. An important mass-independent determinant of muscle performance is the pattern of expression of isoforms of proteins that participate in muscle contraction (e.g., the troponins). In the present study, we tested the hypothesis that ageing impairs alternative splicing of the pre-mRNA encoding fast skeletal muscle troponin T (TNNT3) in human vastus lateralis muscle. Furthermore, we hypothesized that resistance exercise alone or in combination with consumption of essential amino acids would attenuate age-associated effects on TNNT3 alternative splicing. Our results indicate that ageing negatively affects the pattern of TNNT3 alternative splicing in a manner that correlates quantitatively with age-associated reductions in muscle performance. Interestingly, whereas vastus lateralis TNNT3 alternative splicing was unaffected by a bout of resistance exercise 24 h prior to muscle biopsy, ingestion of a mixture of essential amino acids after resistance exercise resulted in a significant shift in the pattern of TNNT3 splice form expression in both age groups to one predicted to promote greater muscle performance. We conclude that essential amino acid supplementation after resistance exercise may provide a means to reduce impairments in skeletal muscle quality during ageing in humans.
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Affiliation(s)
- Joel Coble
- Department of Cellular and Molecular Physiology, The Pennsylvania State University College of Medicine, Hershey, PA 17033
| | - Rudolf J Schilder
- Department of Biology, The Pennsylvania State University, University Park, PA 16802
| | - Arthur Berg
- Department of Public Health Sciences, The Pennsylvania State University College of Medicine, Hershey, PA 17033
| | - Micah J Drummond
- Department of Nutrition and Metabolism, University of Texas Medical Branch, Galveston, TX 77555
| | - Blake B Rasmussen
- Department of Nutrition and Metabolism, University of Texas Medical Branch, Galveston, TX 77555
| | - Scot R Kimball
- Department of Cellular and Molecular Physiology, The Pennsylvania State University College of Medicine, Hershey, PA 17033
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Patel HP, Al-Shanti N, Davies LC, Barton SJ, Grounds MD, Tellam RL, Stewart CE, Cooper C, Sayer AA. Lean mass, muscle strength and gene expression in community dwelling older men: findings from the Hertfordshire Sarcopenia Study (HSS). Calcif Tissue Int 2014; 95:308-16. [PMID: 25055749 DOI: 10.1007/s00223-014-9894-z] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Accepted: 07/04/2014] [Indexed: 12/17/2022]
Abstract
Sarcopenia is associated with adverse health outcomes. This study investigated whether skeletal muscle gene expression was associated with lean mass and grip strength in community-dwelling older men. Utilising a cross-sectional study design, lean muscle mass and grip strength were measured in 88 men aged 68-76 years. Expression profiles of 44 genes implicated in the cellular regulation of skeletal muscle were determined. Serum was analysed for circulating cytokines TNF (tumour necrosis factor), IL-6 (interleukin 6, IFNG (interferon gamma), IL1R1 (interleukin-1 receptor-1). Relationships between skeletal muscle gene expression, circulating cytokines, lean mass and grip strength were examined. Participant groups with higher and lower values of lean muscle mass (n = 18) and strength (n = 20) were used in the analysis of gene expression fold change. Expression of VDR (vitamin D receptor) [fold change (FC) 0.52, standard error for fold change (SE) ± 0.08, p = 0.01] and IFNG mRNA (FC 0.31; SE ± 0.19, p = 0.01) were lower in those with higher lean mass. Expression of IL-6 (FC 0.43; SE ± 0.13, p = 0.02), TNF (FC 0.52; SE ± 0.10, p = 0.02), IL1R1 (FC 0.63; SE ± 0.09, p = 0.04) and MSTN (myostatin) (FC 0.64; SE ± 0.11, p = 0.04) were lower in those with higher grip strength. No other significant changes were observed. Significant negative correlations between serum IL-6 (R = -0.29, p = 0.005), TNF (R = -0.24, p = 0.017) and grip strength were demonstrated. This novel skeletal muscle gene expression study carried out within a well-characterized epidemiological birth cohort has demonstrated that lower expression of VDR and IFNG is associated with higher lean mass, and lower expression of IL-6, TNF, IL1R1 and myostatin is associated with higher grip strength. These findings are consistent with a role of proinflammatory factors in mediating lower muscle strength in community-dwelling older men.
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Affiliation(s)
- Harnish P Patel
- MRC Lifecourse Epidemiology Unit, Southampton General Hospital, University of Southampton, Tremona Road, Southampton, SO16 6YD, UK,
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Tower J, Landis G, Gao R, Luan A, Lee J, Sun Y. Variegated expression of Hsp22 transgenic reporters indicates cell-specific patterns of aging in Drosophila oenocytes. J Gerontol A Biol Sci Med Sci 2014; 69:253-9. [PMID: 23723429 PMCID: PMC3976136 DOI: 10.1093/gerona/glt078] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Accepted: 04/19/2013] [Indexed: 01/10/2023] Open
Abstract
The cytoplasmic chaperone gene Hsp70 and the mitochondrial chaperone gene Hsp22 are upregulated during normal aging in Drosophila in tissue-general patterns. In addition, Hsp22 reporters are dramatically upregulated during aging in a subset of the oenocytes (liver-like cells). Hsp22 reporter expression varied dramatically between individual oenocytes and between groups of oenocytes located in adjacent body segments, and was negatively correlated with accumulation of age pigment, indicating cell-specific and cell-lineage-specific patterns of oenocyte aging. Conditional transgenic systems were used to express 88 transgenes to search for trans-regulators of the Hsp70 and Hsp22 reporters during aging. The wingless gene increased tissue-general upregulation of both Hsp70 and Hsp22 reporters. In contrast, the mitochondrial genes MnSOD and Hsp22 increased expression of Hsp22 reporters in the oenocytes and decreased accumulation of age pigment in these cells. The data suggest that cell-specific and cell lineage-specific patterns of mitochondrial malfunction contribute to oenocyte aging.
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Affiliation(s)
- John Tower
- University of Southern California, 1050 Childs Way, RRI 201, Los Angeles, CA 90089-2910.
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Nielsen S, Hvid T, Kelly M, Lindegaard B, Dethlefsen C, Winding K, Mathur N, Scheele C, Pedersen BK, Laye MJ. Muscle specific miRNAs are induced by testosterone and independently upregulated by age. Front Physiol 2014; 4:394. [PMID: 24478708 PMCID: PMC3899547 DOI: 10.3389/fphys.2013.00394] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Accepted: 12/15/2013] [Indexed: 11/13/2022] Open
Abstract
Age dependent decline in skeletal muscle function leads to impaired metabolic flexibility in elderly individuals. Physical activity and testosterone treatment have proven efficient strategies for delaying this condition. However, a common molecular pathway has not been identified. Muscle specific miRNAs (myomiRs) regulate metabolic pathways in skeletal muscle, are regulated by physical activity, and have response elements for testosterone in their promoter region. We therefore hypothesized that myomiRs would be regulated in skeletal muscle during aging. We further investigated any potential gender-dependent regulation of these miRNAs. We found that the myomiRs miR-1, miR-133a, and miR-133b were increased in skeletal muscle of elderly men compared to younger men. In addition, miR-133a/133b expression was markedly higher in women compared to men. Elimination of circulating testosterone in men was associated with lower levels of miR-133a and miR-133b. A positive regulatory effect of testosterone on miR-133a/133b expression was confirmed in castrated male C57BL/6J mice and in a model of primary human myocytes. Yet, an improvement of fitness level in the testosterone depleted men resulted in a down-regulation of miR133a/b. In conclusion, alterations in fitness level and circulating testosterone seem to represent two independent regulatory events where testosterone is a specific regulator of miR-133a/b expression.
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Affiliation(s)
- Søren Nielsen
- Department of Infectious Diseases, The Centre of Inflammation and Metabolism and the Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen Copenhagen, Denmark
| | - Thine Hvid
- Department of Infectious Diseases, The Centre of Inflammation and Metabolism and the Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen Copenhagen, Denmark
| | - Meghan Kelly
- Department of Infectious Diseases, The Centre of Inflammation and Metabolism and the Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen Copenhagen, Denmark
| | - Birgitte Lindegaard
- Department of Infectious Diseases, The Centre of Inflammation and Metabolism and the Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen Copenhagen, Denmark
| | - Christine Dethlefsen
- Department of Infectious Diseases, The Centre of Inflammation and Metabolism and the Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen Copenhagen, Denmark
| | - Kamilla Winding
- Department of Infectious Diseases, The Centre of Inflammation and Metabolism and the Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen Copenhagen, Denmark
| | - Neha Mathur
- Department of Infectious Diseases, The Centre of Inflammation and Metabolism and the Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen Copenhagen, Denmark
| | - Camilla Scheele
- Department of Infectious Diseases, The Centre of Inflammation and Metabolism and the Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen Copenhagen, Denmark
| | - Bente K Pedersen
- Department of Infectious Diseases, The Centre of Inflammation and Metabolism and the Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen Copenhagen, Denmark
| | - Matthew J Laye
- Department of Infectious Diseases, The Centre of Inflammation and Metabolism and the Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen Copenhagen, Denmark ; The Buck Institute for Research on Aging Novato, CA, USA
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Tam ZY, Gruber J, Ng LF, Halliwell B, Gunawan R. Effects of lithium on age-related decline in mitochondrial turnover and function in Caenorhabditis elegans. J Gerontol A Biol Sci Med Sci 2014; 69:810-20. [PMID: 24398558 DOI: 10.1093/gerona/glt210] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Aging has been associated with the accumulation of damages in molecules and organelles in cells, particularly mitochondria. The rate of damage accumulation is closely tied to the turnover of the affected cellular components. Perturbing mitochondrial turnover has been shown to significantly affect the rate of deterioration of mitochondrial function with age and to alter lifespan of model organisms. In this study, we investigated the effects of upregulating autophagy using lithium in Caenorhabditis elegans. We found that lithium treatment increased both the lifespan and healthspan of C. elegans without any significant change in the mortality rate and oxidative damages to proteins. The increase in healthspan was accompanied by improved mitochondrial energetic function. In contrast, mitochondrial DNA copy number decreased faster with age under lithium. To better understand the interactions among mitochondrial turnover, damage, and function, we created a mathematical model that described the dynamics of functional and dysfunctional mitochondria population. The combined analysis of model and experimental observations showed how preferential (selective) autophagy of dysfunctional mitochondria could lead to better mitochondrial functionality with age, despite a lower population size. However, the results of model analysis suggest that the benefit of increasing autophagy for mitochondrial function is expected to diminish at higher levels of upregulation due to a shrinking mitochondrial population.
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Affiliation(s)
- Zhi Yang Tam
- Institute for Chemical and Bioengineering, ETH Zurich, Switzerland
| | - Jan Gruber
- Department of Biochemistry, Centre for Life Sciences and Yale-NUS College, Science Division, National University of Singapore, Singapore
| | - Li Fang Ng
- Department of Biochemistry, Centre for Life Sciences and
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Jang DH, Bhawal UK, Min HK, Kang HK, Abiko Y, Min BM. A Transcriptional Roadmap to the Senescence and Differentiation of Human Oral Keratinocytes. ACTA ACUST UNITED AC 2014; 70:20-32. [DOI: 10.1093/gerona/glt212] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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