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Lee EJ, Kim SJ, Jeon SY, Chung S, Park SE, Kim JS, Choi SJ, Oh SY, Ryu GH, Jeon HB, Chang JW. Glutaminase-1 inhibition alleviates senescence of Wharton's jelly-derived mesenchymal stem cells via senolysis. Stem Cells Transl Med 2024:szae053. [PMID: 39120480 DOI: 10.1093/stcltm/szae053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 06/23/2024] [Indexed: 08/10/2024] Open
Abstract
Replicative senescence of mesenchymal stem cells (MSCs) caused by repeated cell culture undermines their potential as a cell therapy because of the reduction in their proliferation and therapeutic potential. Glutaminase-1 (GLS1) is reported to be involved in the survival of senescent cells, and inhibition of GLS1 alleviates age-related dysfunction via senescent cell removal. In the present study, we attempted to elucidate the association between MSC senescence and GLS1. We conducted in vitro and in vivo experiments to analyze the effect of GLS1 inhibition on senolysis and the therapeutic effects of MSCs. Inhibition of GLS1 in Wharton's jelly-derived MSCs (WJ-MSCs) reduced the expression of aging-related markers, such as p16, p21, and senescence-associated secretory phenotype genes, by senolysis. Replicative senescence-alleviated WJ-MSCs, which recovered after short-term treatment with bis-2-(5-phenylacetamido-1,2,4-thiadiazol-2-yl)ethyl sulfide 3 (BPTES), showed increased proliferation and therapeutic effects compared to those observed with senescent WJ-MSCs. Moreover, compared to senescent WJ-MSCs, replicative senescence-alleviated WJ-MSCs inhibited apoptosis in serum-starved C2C12 cells, enhanced muscle formation, and hindered apoptosis and fibrosis in mdx mice. These results imply that GLS1 inhibition can ameliorate the therapeutic effects of senescent WJ-MSCs in patients with muscle diseases such as Duchenne muscular dystrophy. In conclusion, GLS1 is a key factor in modulating the senescence mechanism of MSCs, and regulation of GLS1 may enhance the therapeutic effects of senescent MSCs, thereby increasing the success rate of clinical trials involving MSCs.
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Affiliation(s)
- Eun Joo Lee
- Cell and Gene Therapy Institute, ENCell Co. Ltd., Seoul 06072, Republic of Korea
- Cell and Gene Therapy Institute, Samsung Medical Center, Seoul 06351, Republic of Korea
| | - Sun Jeong Kim
- Cell and Gene Therapy Institute, ENCell Co. Ltd., Seoul 06072, Republic of Korea
- Cell and Gene Therapy Institute, Samsung Medical Center, Seoul 06351, Republic of Korea
| | - Su Yeon Jeon
- Cell and Gene Therapy Institute, ENCell Co. Ltd., Seoul 06072, Republic of Korea
- Cell and Gene Therapy Institute, Samsung Medical Center, Seoul 06351, Republic of Korea
| | - Soobeen Chung
- Cell and Gene Therapy Institute, ENCell Co. Ltd., Seoul 06072, Republic of Korea
- Cell and Gene Therapy Institute, Samsung Medical Center, Seoul 06351, Republic of Korea
| | - Sang Eon Park
- Cell and Gene Therapy Institute, ENCell Co. Ltd., Seoul 06072, Republic of Korea
- Cell and Gene Therapy Institute, Samsung Medical Center, Seoul 06351, Republic of Korea
| | - Jae-Sung Kim
- Division of Radiation Biomedical Research, Korea Institute of Radiological and Medical Sciences, Seoul 139706, Republic of Korea
- Radiological and Medico‑Oncological Sciences, University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Suk-Joo Choi
- Department of Obstetrics and Gynecology, Samsung Medical Center, Seoul 06351, Republic of Korea
| | - Soo-Young Oh
- Department of Obstetrics and Gynecology, Samsung Medical Center, Seoul 06351, Republic of Korea
| | - Gyu Ha Ryu
- Department of Medical Device Management and Research, SAIHST, Sungkyunkwan University, Seoul 06355, Republic of Korea
- The Office of R&D Strategy & Planning, Samsung Medical Center, Seoul 06351, Republic of Korea
| | - Hong Bae Jeon
- Cell and Gene Therapy Institute, ENCell Co. Ltd., Seoul 06072, Republic of Korea
| | - Jong Wook Chang
- Cell and Gene Therapy Institute, ENCell Co. Ltd., Seoul 06072, Republic of Korea
- Cell and Gene Therapy Institute, Samsung Medical Center, Seoul 06351, Republic of Korea
- Department of Health Sciences and Technology, SAIHST, Sungkyunkwan University, Seoul 06355, Republic of Korea
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2
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Röszer T. MicroRNA Profile of Mouse Adipocyte-Derived Extracellular Vesicles. Cells 2024; 13:1298. [PMID: 39120327 PMCID: PMC11311276 DOI: 10.3390/cells13151298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2024] [Revised: 07/26/2024] [Accepted: 07/30/2024] [Indexed: 08/10/2024] Open
Abstract
The post-transcriptional control of gene expression is a complex and evolving field in adipocyte biology, with the premise that the delivery of microRNA (miRNA) species to the obese adipose tissue may facilitate weight loss. Cells shed extracellular vesicles (EVs) that may deliver miRNAs as intercellular messengers. However, we know little about the miRNA profile of EVs secreted by adipocytes during postnatal development. Here, we defined the miRNA cargo of EVs secreted by mouse adipocytes in two distinct phases of development: on postnatal day 6, when adipocytes are lipolytic and thermogenic, and on postnatal day 56, when adipocytes have active lipogenesis. EVs were collected from cell culture supernatants, and their miRNA profile was defined by small RNA sequencing. The most abundant miRNA of mouse adipocyte-derived EVs was mmu-miR-148a-3p. Adipocyte EVs on postnatal day 6 were hallmarked with mmu-miR-98-5p, and some miRNAs were specific to this developmental stage, such as mmu-miR-466i-5p and 12 novel miRNAs. Adipocytes on postnatal day 56 secreted mmu-miR-365-3p, and 16 miRNAs were specific to this developmental stage. The miRNA cargo of adipocyte EVs targeted gene networks of cell proliferation, insulin signaling, interferon response, thermogenesis, and lipogenesis. We provided here a database of miRNAs secreted by developing mouse adipocytes, which may be a tool for further studies on the regulation of gene networks that control mouse adipocyte development.
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Affiliation(s)
- Tamás Röszer
- Department of Pediatrics, Faculty of Medicine, University of Debrecen, 4032 Debrecen, Hungary
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3
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Kiełbowski K, Bakinowska E, Procyk G, Ziętara M, Pawlik A. The Role of MicroRNA in the Pathogenesis of Duchenne Muscular Dystrophy. Int J Mol Sci 2024; 25:6108. [PMID: 38892293 PMCID: PMC11172814 DOI: 10.3390/ijms25116108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2024] [Revised: 05/29/2024] [Accepted: 05/29/2024] [Indexed: 06/21/2024] Open
Abstract
Duchenne muscular dystrophy (DMD) is an X-linked progressive disorder associated with muscle wasting and degeneration. The disease is caused by mutations in the gene that encodes dystrophin, a protein that links the cytoskeleton with cell membrane proteins. The current treatment methods aim to relieve the symptoms of the disease or partially rescue muscle functionality. However, they are insufficient to suppress disease progression. In recent years, studies have uncovered an important role for non-coding RNAs (ncRNAs) in regulating the progression of numerous diseases. ncRNAs, such as micro-RNAs (miRNAs), bind to their target messenger RNAs (mRNAs) to suppress translation. Understanding the mechanisms involving dysregulated miRNAs can improve diagnosis and suggest novel treatment methods for patients with DMD. This review presents the available evidence on the role of altered expression of miRNAs in the pathogenesis of DMD. We discuss the involvement of these molecules in the processes associated with muscle physiology and DMD-associated cardiomyopathy.
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Affiliation(s)
- Kajetan Kiełbowski
- Department of Physiology, Pomeranian Medical University, 70-111 Szczecin, Poland; (K.K.); (E.B.); (M.Z.)
| | - Estera Bakinowska
- Department of Physiology, Pomeranian Medical University, 70-111 Szczecin, Poland; (K.K.); (E.B.); (M.Z.)
| | - Grzegorz Procyk
- 1st Chair and Department of Cardiology, Medical University of Warsaw, Banacha 1A, 02-097 Warsaw, Poland;
- Doctoral School, Medical University of Warsaw, 02-091 Warsaw, Poland
| | - Marta Ziętara
- Department of Physiology, Pomeranian Medical University, 70-111 Szczecin, Poland; (K.K.); (E.B.); (M.Z.)
| | - Andrzej Pawlik
- Department of Physiology, Pomeranian Medical University, 70-111 Szczecin, Poland; (K.K.); (E.B.); (M.Z.)
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4
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Li D, Yue Y, Feng X, Lv W, Fan Y, Sha P, Zhao T, Lin Y, Xiong X, Li J, Xiong Y. MicroRNA-542-3p targets Pten to inhibit the myoblasts proliferation but suppresses myogenic differentiation independent of targeted Pten. BMC Genomics 2024; 25:325. [PMID: 38561670 PMCID: PMC10983626 DOI: 10.1186/s12864-024-10260-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 03/26/2024] [Indexed: 04/04/2024] Open
Abstract
BACKGROUND Non-coding RNA is a key epigenetic regulation factor during skeletal muscle development and postnatal growth, and miR-542-3p was reported to be conserved and highly expressed in the skeletal muscle among different species. However, its exact functions in the proliferation of muscle stem cells and myogenesis remain to be determined. METHODS Transfection of proliferative and differentiated C2C12 cells used miR-542-3p mimic and inhibitor. RT-qPCR, EdU staining, immunofluorescence staining, cell counting kit 8 (CCK-8), and Western blot were used to evaluate the proliferation and myogenic differentiation caused by miR-542-3p. The dual luciferase reporter analysis and rescued experiment of the target gene were used to reveal the molecular mechanism. RESULTS The data shows overexpression of miR-542-3p downregulation of mRNA and protein levels of proliferation marker genes, reduction of EdU+ cells, and cellular vitality. Additionally, knocking it down promoted the aforementioned phenotypes. For differentiation, the miR-542-3p gain-of-function reduced both mRNA and protein levels of myogenic genes, including MYOG, MYOD1, et al. Furthermore, immunofluorescence staining immunized by MYHC antibody showed that the myotube number, fluorescence intensity, differentiation index, and myotube fusion index all decreased in the miR-542-3p mimic group, compared with the control group. Conversely, these phenotypes exhibited an increased trend in the miR-542-3p inhibitor group. Mechanistically, phosphatase and tensin homolog (Pten) was identified as the bona fide target gene of miR-542-3p by dual luciferase reporter gene assay, si-Pten combined with miR-542-3p inhibitor treatments totally rescued the promotion of proliferation by loss-function of miR-542-3p. CONCLUSIONS This study indicates that miR-542-3p inhibits the proliferation and differentiation of myoblast and Pten is a dependent target gene of miR-542-3p in myoblast proliferation, but not in differentiation.
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Grants
- No. 31902154 the National Natural Sciences Foundation of China
- No. 31902154 the National Natural Sciences Foundation of China
- No. 31902154 the National Natural Sciences Foundation of China
- No. 31902154 the National Natural Sciences Foundation of China
- No. 31902154 the National Natural Sciences Foundation of China
- No. 31902154 the National Natural Sciences Foundation of China
- No. 31902154 the National Natural Sciences Foundation of China
- No. 31902154 the National Natural Sciences Foundation of China
- No. 31902154 the National Natural Sciences Foundation of China
- No. 31902154 the National Natural Sciences Foundation of China
- No. 31902154 the National Natural Sciences Foundation of China
- No. 23NSFSC1804 the Natural Science Foundation of Sichuan Province
- No. 23NSFSC1804 the Natural Science Foundation of Sichuan Province
- No. 23NSFSC1804 the Natural Science Foundation of Sichuan Province
- No. 23NSFSC1804 the Natural Science Foundation of Sichuan Province
- No. 23NSFSC1804 the Natural Science Foundation of Sichuan Province
- No. 23NSFSC1804 the Natural Science Foundation of Sichuan Province
- No. 23NSFSC1804 the Natural Science Foundation of Sichuan Province
- No. 23NSFSC1804 the Natural Science Foundation of Sichuan Province
- No. 23NSFSC1804 the Natural Science Foundation of Sichuan Province
- No. 23NSFSC1804 the Natural Science Foundation of Sichuan Province
- No. 23NSFSC1804 the Natural Science Foundation of Sichuan Province
- No. 23ZDYF3118 the Key Research and Development Program of Sichuan Province
- No. 23ZDYF3118 the Key Research and Development Program of Sichuan Province
- No. 23ZDYF3118 the Key Research and Development Program of Sichuan Province
- No. 23ZDYF3118 the Key Research and Development Program of Sichuan Province
- No. 23ZDYF3118 the Key Research and Development Program of Sichuan Province
- No. 23ZDYF3118 the Key Research and Development Program of Sichuan Province
- No. 23ZDYF3118 the Key Research and Development Program of Sichuan Province
- No. 23ZDYF3118 the Key Research and Development Program of Sichuan Province
- No. 23ZDYF3118 the Key Research and Development Program of Sichuan Province
- No. 23ZDYF3118 the Key Research and Development Program of Sichuan Province
- No. 23ZDYF3118 the Key Research and Development Program of Sichuan Province
- No. XM2023004 the Southwest Minzu University Double World-Class Project
- No. XM2023004 the Southwest Minzu University Double World-Class Project
- No. XM2023004 the Southwest Minzu University Double World-Class Project
- No. XM2023004 the Southwest Minzu University Double World-Class Project
- No. XM2023004 the Southwest Minzu University Double World-Class Project
- No. XM2023004 the Southwest Minzu University Double World-Class Project
- No. XM2023004 the Southwest Minzu University Double World-Class Project
- No. XM2023004 the Southwest Minzu University Double World-Class Project
- No. XM2023004 the Southwest Minzu University Double World-Class Project
- No. XM2023004 the Southwest Minzu University Double World-Class Project
- No. XM2023004 the Southwest Minzu University Double World-Class Project
- No. 2023NYXXS130 the Fundamental Research Funds for the Central Universities, Southwest Minzu University
- No. 2023NYXXS130 the Fundamental Research Funds for the Central Universities, Southwest Minzu University
- No. 2023NYXXS130 the Fundamental Research Funds for the Central Universities, Southwest Minzu University
- No. 2023NYXXS130 the Fundamental Research Funds for the Central Universities, Southwest Minzu University
- No. 2023NYXXS130 the Fundamental Research Funds for the Central Universities, Southwest Minzu University
- No. 2023NYXXS130 the Fundamental Research Funds for the Central Universities, Southwest Minzu University
- No. 2023NYXXS130 the Fundamental Research Funds for the Central Universities, Southwest Minzu University
- No. 2023NYXXS130 the Fundamental Research Funds for the Central Universities, Southwest Minzu University
- No. 2023NYXXS130 the Fundamental Research Funds for the Central Universities, Southwest Minzu University
- No. 2023NYXXS130 the Fundamental Research Funds for the Central Universities, Southwest Minzu University
- No. 2023NYXXS130 the Fundamental Research Funds for the Central Universities, Southwest Minzu University
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Affiliation(s)
- Dandan Li
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education/Sichuan Province, Southwest Minzu University, Chengdu, 610041, China
- College of Animal & Veterinary Sciences, Southwest Minzu University, Chengdu, 610041, China
- Key Laboratory of Animal Science of National Ethnic Affairs Commission of China, Southwest Minzu University, Chengdu, 610041, China
| | - Yongqi Yue
- College of Animal Science and Technology, Northwest A&F University, Shaanxi, 712100, China
| | - Xinxin Feng
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education/Sichuan Province, Southwest Minzu University, Chengdu, 610041, China
- Chongxin County Animal Husbandry and Veterinary Center, Pingliang, 744200, China
| | - Weibing Lv
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education/Sichuan Province, Southwest Minzu University, Chengdu, 610041, China
- College of Animal & Veterinary Sciences, Southwest Minzu University, Chengdu, 610041, China
- Key Laboratory of Animal Science of National Ethnic Affairs Commission of China, Southwest Minzu University, Chengdu, 610041, China
| | - Yilin Fan
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education/Sichuan Province, Southwest Minzu University, Chengdu, 610041, China
- College of Animal & Veterinary Sciences, Southwest Minzu University, Chengdu, 610041, China
- Key Laboratory of Animal Science of National Ethnic Affairs Commission of China, Southwest Minzu University, Chengdu, 610041, China
| | - Peiran Sha
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education/Sichuan Province, Southwest Minzu University, Chengdu, 610041, China
- College of Animal & Veterinary Sciences, Southwest Minzu University, Chengdu, 610041, China
- Key Laboratory of Animal Science of National Ethnic Affairs Commission of China, Southwest Minzu University, Chengdu, 610041, China
| | - Te Zhao
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education/Sichuan Province, Southwest Minzu University, Chengdu, 610041, China
- College of Animal & Veterinary Sciences, Southwest Minzu University, Chengdu, 610041, China
- Key Laboratory of Animal Science of National Ethnic Affairs Commission of China, Southwest Minzu University, Chengdu, 610041, China
| | - Yaqiu Lin
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education/Sichuan Province, Southwest Minzu University, Chengdu, 610041, China
- College of Animal & Veterinary Sciences, Southwest Minzu University, Chengdu, 610041, China
- Key Laboratory of Animal Science of National Ethnic Affairs Commission of China, Southwest Minzu University, Chengdu, 610041, China
| | - Xianrong Xiong
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education/Sichuan Province, Southwest Minzu University, Chengdu, 610041, China
- College of Animal & Veterinary Sciences, Southwest Minzu University, Chengdu, 610041, China
- Key Laboratory of Animal Science of National Ethnic Affairs Commission of China, Southwest Minzu University, Chengdu, 610041, China
| | - Jian Li
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education/Sichuan Province, Southwest Minzu University, Chengdu, 610041, China
- College of Animal & Veterinary Sciences, Southwest Minzu University, Chengdu, 610041, China
- Key Laboratory of Animal Science of National Ethnic Affairs Commission of China, Southwest Minzu University, Chengdu, 610041, China
| | - Yan Xiong
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education/Sichuan Province, Southwest Minzu University, Chengdu, 610041, China.
- College of Animal & Veterinary Sciences, Southwest Minzu University, Chengdu, 610041, China.
- Key Laboratory of Animal Science of National Ethnic Affairs Commission of China, Southwest Minzu University, Chengdu, 610041, China.
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5
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Wu B, Shi L, Wu Y. PTEN Inhibitor Treatment Lowers Muscle Plasma Membrane Damage and Enhances Muscle ECM Homeostasis after High-Intensity Eccentric Exercise in Mice. Int J Mol Sci 2023; 24:9954. [PMID: 37373102 DOI: 10.3390/ijms24129954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 05/23/2023] [Accepted: 06/07/2023] [Indexed: 06/29/2023] Open
Abstract
Exercise-induced muscle damage (EIMD) is a common occurrence in athletes and can lead to delayed onset muscle soreness, reduced athletic performance, and an increased risk of secondary injury. EIMD is a complex process involving oxidative stress, inflammation, and various cellular signaling pathways. Timely and effective repair of the extracellular matrix (ECM) and plasma membrane (PM) damage is critical for recovery from EIMD. Recent studies have shown that the targeted inhibition of phosphatase and tension homolog (PTEN) in skeletal muscles can enhance the ECM environment and reduce membrane damage in Duchenne muscular dystrophy (DMD) mice. However, the effects of PTEN inhibition on EIMD are unknown. Therefore, the present study aimed to investigate the potential therapeutic effects of VO-OHpic (VO), a PTEN inhibitor, on EIMD symptoms and underlying mechanisms. Our findings indicate that VO treatment effectively enhances skeletal muscle function and reduces strength loss during EIMD by upregulating membrane repair signals related to MG53 and ECM repair signals related to the tissue inhibitor of metalloproteinases (TIMPs) and matrix metalloproteinase (MMPs). These results highlight the potential of pharmacological PTEN inhibition as a promising therapeutic approach for EIMD.
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Affiliation(s)
- Baile Wu
- Department of Exercise Physiology, School of Sports Science, Beijing Sport University, Beijing 100084, China
- Key Laboratory of Sports and Physical Health of the Ministry of Education, Beijing Sport University, Beijing 100084, China
| | - Lijun Shi
- Department of Exercise Physiology, School of Sports Science, Beijing Sport University, Beijing 100084, China
| | - Ying Wu
- Department of Exercise Physiology, School of Sports Science, Beijing Sport University, Beijing 100084, China
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6
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Wang J, Tierney L, Wilson C, Phillips V, Goldman L, Mumaw C, Muang E, Walker CL. Carboxyl-terminal modulator protein (CTMP) deficiency mitigates denervation-induced skeletal muscle atrophy. Biochem Biophys Res Commun 2023; 644:155-161. [PMID: 36652767 DOI: 10.1016/j.bbrc.2023.01.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 01/10/2023] [Indexed: 01/13/2023]
Abstract
Denervated skeletal muscles show decreased Akt activity and phosphorylation, resulting in atrophy. Akt inhibits downstream transcription of atrophy-associated ubiquitin ligases like muscle ring-finger protein 1 (MuRF-1). In addition, reduced Akt signaling contributes to aberrant protein synthesis in muscles. In ALS mice, we recently found that carboxyl-terminator modulator protein (CTMP) expression is increased and correlated with reduced Akt signaling in atrophic skeletal muscle. CTMP has also been implicated in promoting muscle degeneration and catabolism in an in vitro muscle atrophy model. The present study examined whether sciatic nerve injury (SNI) stimulated CTMP expression in denervated skeletal muscle during muscle atrophy. We hypothesized that CTMP deficiency would reduce neurogenic atrophy and reverse Akt signaling downregulation. Compared to the unaffected contralateral muscle, wild-type (WT) gastrocnemius muscle had a significant increase in CTMP (p < 0.05). Furthermore, denervated CTMP knockout (CTMP-KO) gastrocnemius weighed more than WT muscle (p < 0.05). Denervated CTMP-KO gastrocnemius also showed higher Akt and downstream glycogen synthase kinase 3β (GSK3β) phosphorylation compared to WT muscle (p < 0.05) as well as ribosomal proteins S6 and 4E-BP1 phosphorylation (p < 0.001 and p < 0.05, respectively). Moreover, CTMP-KO mice showed significantly lower levels of E3 ubiquitin ligase MuRF-1 and myostatin than WT muscle (p < 0.05). Our findings suggest that CTMP is essential to muscle atrophy after denervation and it may act by reducing Akt signaling, protein synthesis, and increasing myocellular catabolism.
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Affiliation(s)
- Junmei Wang
- Department of Biomedical Sciences and Comprehensive Care, Indiana University School of Dentistry, Indianapolis, IN, 46202, USA
| | - Lydia Tierney
- Department of Biomedical Sciences and Comprehensive Care, Indiana University School of Dentistry, Indianapolis, IN, 46202, USA
| | - Christopher Wilson
- Department of Biomedical Sciences and Comprehensive Care, Indiana University School of Dentistry, Indianapolis, IN, 46202, USA
| | - Victoria Phillips
- Department of Biomedical Sciences and Comprehensive Care, Indiana University School of Dentistry, Indianapolis, IN, 46202, USA
| | - Lillian Goldman
- Department of Biomedical Sciences and Comprehensive Care, Indiana University School of Dentistry, Indianapolis, IN, 46202, USA
| | - Christen Mumaw
- Department of Biomedical Sciences and Comprehensive Care, Indiana University School of Dentistry, Indianapolis, IN, 46202, USA; Neuromusculoskeletal Research Group, Richard L. Roudebush Veterans Affairs Medical Center, Indianapolis, IN, 46202, USA
| | - En Muang
- Department of Biomedical Sciences and Comprehensive Care, Indiana University School of Dentistry, Indianapolis, IN, 46202, USA
| | - Chandler L Walker
- Department of Biomedical Sciences and Comprehensive Care, Indiana University School of Dentistry, Indianapolis, IN, 46202, USA; Neuromusculoskeletal Research Group, Richard L. Roudebush Veterans Affairs Medical Center, Indianapolis, IN, 46202, USA.
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7
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Is the fundamental pathology in Duchenne's muscular dystrophy caused by a failure of glycogenolysis–glycolysis in costameres? J Genet 2023. [DOI: 10.1007/s12041-022-01410-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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8
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Pharmacological inhibition of HDAC6 improves muscle phenotypes in dystrophin-deficient mice by downregulating TGF-β via Smad3 acetylation. Nat Commun 2022; 13:7108. [PMID: 36402791 PMCID: PMC9675748 DOI: 10.1038/s41467-022-34831-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 11/01/2022] [Indexed: 11/21/2022] Open
Abstract
The absence of dystrophin in Duchenne muscular dystrophy disrupts the dystrophin-associated glycoprotein complex resulting in skeletal muscle fiber fragility and atrophy, associated with fibrosis as well as microtubule and neuromuscular junction disorganization. The specific, non-conventional cytoplasmic histone deacetylase 6 (HDAC6) was recently shown to regulate acetylcholine receptor distribution and muscle atrophy. Here, we report that administration of the HDAC6 selective inhibitor tubastatin A to the Duchenne muscular dystrophy, mdx mouse model increases muscle strength, improves microtubule, neuromuscular junction, and dystrophin-associated glycoprotein complex organization, and reduces muscle atrophy and fibrosis. Interestingly, we found that the beneficial effects of HDAC6 inhibition involve the downregulation of transforming growth factor beta signaling. By increasing Smad3 acetylation in the cytoplasm, HDAC6 inhibition reduces Smad2/3 phosphorylation, nuclear translocation, and transcriptional activity. These findings provide in vivo evidence that Smad3 is a new target of HDAC6 and implicate HDAC6 as a potential therapeutic target in Duchenne muscular dystrophy.
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9
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Transcriptome Sequencing Analysis of circRNA in Skeletal Muscle between Fast- and Slow-Growing Chickens at Embryonic Stages. Animals (Basel) 2022; 12:ani12223166. [PMID: 36428392 PMCID: PMC9686870 DOI: 10.3390/ani12223166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 11/10/2022] [Accepted: 11/14/2022] [Indexed: 11/18/2022] Open
Abstract
Skeletal muscle growth has always been the focus of the broiler industry, and circRNAs play a significant role in this process. We collected leg muscles of slow- and fast-growing Bian chicken embryos in the study at 14 (S14 and F14) and 20 (S20 and F20) days for RNA-seq. Finally, 123 and 121 differentially expressed circRNAs (DECs) were identified in S14 vs. F14 and S20 vs. F20, respectively. GO enrichment analysis for DECs obtained important biological process (BP) terms including nicotinate nucleotide biosynthetic process, nicotinate nucleotide salvage, and NAD salvage in S20 vs. F20 and protein mannosylation in S14 vs. F14. KEGG pathway analysis showed Wnt signaling pathway, Tight junction, Ubiquitin mediated proteolysis, and Notch signaling pathway were enriched in the top 20. Based on the GO and KEGG analysis results, we found some significant host genes and circRNAs such as NAPRT and novel_circ_0004547, DVL1 and novel_circ_0003578, JAK2 and novel_circ_0010289, DERA and novel_circ_0003082, etc. Further analysis found 19 co-differentially expressed circRNAs between the two comparison groups. We next constructed a circRNA-miRNA network for them, and some candidate circRNA-miRNA pairs related to skeletal muscle were obtained, such as novel_circ_0002153-miR-12219-5p, novel_circ_0003578-miR-3064-3p, and novel_circ_0010661-miR-12260-3p. These results would help to reveal the mechanism for circRNAs in skeletal muscle and also provide some guidance for the breeding of broilers.
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10
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Brenmoehl J, Walz C, Caffier C, Brosig E, Walz M, Ohde D, Trakooljul N, Langhammer M, Ponsuksili S, Wimmers K, Zettl UK, Hoeflich A. Central Suppression of the GH/IGF Axis and Abrogation of Exercise-Related mTORC1/2 Activation in the Muscle of Phenotype-Selected Male Marathon Mice (DUhTP). Cells 2021; 10:3418. [PMID: 34943926 PMCID: PMC8699648 DOI: 10.3390/cells10123418] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 11/30/2021] [Accepted: 12/02/2021] [Indexed: 02/08/2023] Open
Abstract
The somatotropic axis is required for a number of biological processes, including growth, metabolism, and aging. Due to its central effects on growth and metabolism and with respect to its positive effects on muscle mass, regulation of the GH/IGF-system during endurance exercise is of particular interest. In order to study the control of gene expression and adaptation related to physical performance, we used a non-inbred mouse model, phenotype-selected for high running performance (DUhTP). Gene expression of the GH/IGF-system and related signaling cascades were studied in the pituitary gland and muscle of sedentary males of marathon and unselected control mice. In addition, the effects of three weeks of endurance exercise were assessed in both genetic groups. In pituitary glands from DUhTP mice, reduced expression of Pou1f1 (p = 0.002) was accompanied by non-significant reductions of Gh mRNA (p = 0.066). In addition, mRNA expression of Ghsr and Sstr2 were significantly reduced in the pituitary glands from DUhTP mice (p ≤ 0.05). Central downregulation of Pou1f1 expression was accompanied by reduced serum concentrations of IGF1 and coordinated downregulation of multiple GH/IGF-signaling compounds in muscle (e.g., Ghr, Igf1, Igf1r, Igf2r, Irs1, Irs2, Akt3, Gskb, Pik3ca/b/a2, Pten, Rictor, Rptor, Tsc1, Mtor; p ≤ 0.05). In response to exercise, the expression of Igfbp3, Igfbp 4, and Igfbp 6 and Stc2 mRNA was increased in the muscle of DUhTP mice (p ≤ 0.05). Training-induced specific activation of AKT, S6K, and p38 MAPK was found in muscles from control mice but not in DUhTP mice (p ≤ 0.05), indicating a lack of mTORC1 and mTORC2 activation in marathon mice in response to physical exercise. While hormone-dependent mTORC1 and mTORC2 pathways in marathon mice were repressed, robust increases of Ragulator complex compounds (p ≤ 0.001) and elevated sirtuin 2 to 6 mRNA expression were observed in the DUhTP marathon mouse model (p ≤ 0.05). Activation of AMPK was not observed under the experimental conditions of the present study. Our results describe coordinated downregulation of the somatotropic pathway in long-term selected marathon mice (DUhTP), possibly via the pituitary gland and muscle interaction. Our results, for the first time, demonstrate that GH/IGF effects are repressed in a context of superior running performance in mice.
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Affiliation(s)
- Julia Brenmoehl
- Institute for Genome Biology, Research Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196 Dummerstorf, Germany; (J.B.); (C.W.); (C.C.); (E.B.); (M.W.); (D.O.); (N.T.); (S.P.); (K.W.)
| | - Christina Walz
- Institute for Genome Biology, Research Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196 Dummerstorf, Germany; (J.B.); (C.W.); (C.C.); (E.B.); (M.W.); (D.O.); (N.T.); (S.P.); (K.W.)
| | - Caroline Caffier
- Institute for Genome Biology, Research Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196 Dummerstorf, Germany; (J.B.); (C.W.); (C.C.); (E.B.); (M.W.); (D.O.); (N.T.); (S.P.); (K.W.)
- Department of Neurology, Neuroimmunological Section, University Medicine Rostock, Gehlsheimer Str. 20, 18147 Rostock, Germany;
| | - Elli Brosig
- Institute for Genome Biology, Research Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196 Dummerstorf, Germany; (J.B.); (C.W.); (C.C.); (E.B.); (M.W.); (D.O.); (N.T.); (S.P.); (K.W.)
- Department of Neurology, Neuroimmunological Section, University Medicine Rostock, Gehlsheimer Str. 20, 18147 Rostock, Germany;
| | - Michael Walz
- Institute for Genome Biology, Research Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196 Dummerstorf, Germany; (J.B.); (C.W.); (C.C.); (E.B.); (M.W.); (D.O.); (N.T.); (S.P.); (K.W.)
| | - Daniela Ohde
- Institute for Genome Biology, Research Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196 Dummerstorf, Germany; (J.B.); (C.W.); (C.C.); (E.B.); (M.W.); (D.O.); (N.T.); (S.P.); (K.W.)
| | - Nares Trakooljul
- Institute for Genome Biology, Research Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196 Dummerstorf, Germany; (J.B.); (C.W.); (C.C.); (E.B.); (M.W.); (D.O.); (N.T.); (S.P.); (K.W.)
| | - Martina Langhammer
- Lab Animal Facility, Research Institute for Genetics and Biometry, Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196 Dummerstorf, Germany;
| | - Siriluck Ponsuksili
- Institute for Genome Biology, Research Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196 Dummerstorf, Germany; (J.B.); (C.W.); (C.C.); (E.B.); (M.W.); (D.O.); (N.T.); (S.P.); (K.W.)
| | - Klaus Wimmers
- Institute for Genome Biology, Research Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196 Dummerstorf, Germany; (J.B.); (C.W.); (C.C.); (E.B.); (M.W.); (D.O.); (N.T.); (S.P.); (K.W.)
| | - Uwe K. Zettl
- Department of Neurology, Neuroimmunological Section, University Medicine Rostock, Gehlsheimer Str. 20, 18147 Rostock, Germany;
| | - Andreas Hoeflich
- Institute for Genome Biology, Research Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196 Dummerstorf, Germany; (J.B.); (C.W.); (C.C.); (E.B.); (M.W.); (D.O.); (N.T.); (S.P.); (K.W.)
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PTEN in prefrontal cortex is essential in regulating depression-like behaviors in mice. Transl Psychiatry 2021; 11:185. [PMID: 33771972 PMCID: PMC7998021 DOI: 10.1038/s41398-021-01312-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 02/24/2021] [Accepted: 03/11/2021] [Indexed: 12/12/2022] Open
Abstract
Chronic stress is an environmental risk factor for depression and causes neuronal atrophy in the prefrontal cortex (PFC) and other brain regions. It is still unclear about the molecular mechanism underlying the behavioral alterations and neuronal atrophy induced by chronic stress. We here report that phosphatase and tensin homolog deleted on chromosome ten (PTEN) is a mediator for chronic stress-induced depression-like behaviors and neuronal atrophy in mice. One-month chronic restraint stress (CRS) up-regulated PTEN signaling pathway in the PFC of mice as indicated by increasing levels of PTEN, p-MEK, and p-ERK but decreasing levels of p-AKT. Over-expression of Pten in the PFC led to an increase of depression-like behaviors, whereas genetic inactivation or knockdown of Pten in the PFC prevented the CRS-induced depression-like behaviors. In addition, systemic administration of PTEN inhibitor was also able to prevent these behaviors. Cellular examination showed that Pten over-expression or the CRS treatment resulted in PFC neuron atrophy, and this atrophy was blocked by genetic inactivation of Pten or systemic administration of PTEN inhibitor. Furthermore, possible causal link between Pten and glucocorticoids was examined. In chronic dexamethasone (Dex, a glucocorticoid agonist) treatment-induced depression model, increased PTEN levels were observed, and depression-like behaviors and PFC neuron atrophy were attenuated by the administration of PTEN inhibitor. Our results indicate that PTEN serves as a key mediator in chronic stress-induced neuron atrophy as well as depression-like behaviors, providing molecular evidence supporting the synaptic plasticity theory of depression.
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12
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Peris-Moreno D, Cussonneau L, Combaret L, Polge C, Taillandier D. Ubiquitin Ligases at the Heart of Skeletal Muscle Atrophy Control. Molecules 2021; 26:molecules26020407. [PMID: 33466753 PMCID: PMC7829870 DOI: 10.3390/molecules26020407] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 01/08/2021] [Accepted: 01/10/2021] [Indexed: 02/07/2023] Open
Abstract
Skeletal muscle loss is a detrimental side-effect of numerous chronic diseases that dramatically increases mortality and morbidity. The alteration of protein homeostasis is generally due to increased protein breakdown while, protein synthesis may also be down-regulated. The ubiquitin proteasome system (UPS) is a master regulator of skeletal muscle that impacts muscle contractile properties and metabolism through multiple levers like signaling pathways, contractile apparatus degradation, etc. Among the different actors of the UPS, the E3 ubiquitin ligases specifically target key proteins for either degradation or activity modulation, thus controlling both pro-anabolic or pro-catabolic factors. The atrogenes MuRF1/TRIM63 and MAFbx/Atrogin-1 encode for key E3 ligases that target contractile proteins and key actors of protein synthesis respectively. However, several other E3 ligases are involved upstream in the atrophy program, from signal transduction control to modulation of energy balance. Controlling E3 ligases activity is thus a tempting approach for preserving muscle mass. While indirect modulation of E3 ligases may prove beneficial in some situations of muscle atrophy, some drugs directly inhibiting their activity have started to appear. This review summarizes the main signaling pathways involved in muscle atrophy and the E3 ligases implicated, but also the molecules potentially usable for future therapies.
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Parveen A, Wen Y, Roy A, Kumar A. Therapeutic Targeting of PTEN in Duchenne Muscular Dystrophy. Mol Ther 2021; 29:8-9. [PMID: 33338398 DOI: 10.1016/j.ymthe.2020.12.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Affiliation(s)
- Arshiya Parveen
- Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy, University of Houston, Houston, TX 77204, USA
| | - Yefei Wen
- Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy, University of Houston, Houston, TX 77204, USA
| | - Anirban Roy
- Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy, University of Houston, Houston, TX 77204, USA
| | - Ashok Kumar
- Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy, University of Houston, Houston, TX 77204, USA.
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Polymeric nanoparticles functionalized with muscle-homing peptides for targeted delivery of phosphatase and tensin homolog inhibitor to skeletal muscle. Acta Biomater 2020; 118:196-206. [PMID: 33053428 DOI: 10.1016/j.actbio.2020.10.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 10/01/2020] [Accepted: 10/07/2020] [Indexed: 12/30/2022]
Abstract
Phosphatase and tensin homolog (PTEN) antagonizes muscle growth and repair, and inhibition of PTEN has been shown to improve the pathophysiology and dystrophic muscle function in a mouse model of Duchenne muscular dystrophy (DMD). However, conventional pharmacological delivery of PTEN inhibitors carries a high risk of off-target side effects in other non-muscle organs due to broad targeting spectrums. Here we report a muscle-targeted nanoparticulate platform for cell-specific delivery of a PTEN inhibitor. Poly(lactide-co-glycolide)-b-poly(ethylene glycol) nanoparticles (NPs) are functionalized with a muscle-homing peptide M12 to promote the selective uptake by muscle cells/tissue in vitro and in vivo. Moreover, the NPs are formulated to slowly release the PTEN inhibitor, preventing cytotoxicity associated with direct exposure to the drug and facilitating sustained inhibition of PTEN. This advanced delivery approach taking advantages of polymeric nanomaterials and muscle-homing peptides opens a new avenue for the development of long-term therapeutic strategies in DMD treatment.
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