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Niu X, Melendez DL, Raj S, Cai J, Senadeera D, Mandelbaum J, Shestopalov IA, Martin SD, Zon LI, Schlaeger TM, Lai LP, McMahon AP, Craft AM, Galloway JL. A conserved transcription factor regulatory program promotes tendon fate. Dev Cell 2024:S1534-5807(24)00489-1. [PMID: 39216481 DOI: 10.1016/j.devcel.2024.08.006] [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: 04/03/2023] [Revised: 01/24/2024] [Accepted: 08/08/2024] [Indexed: 09/04/2024]
Abstract
Tendons, which transmit force from muscles to bones, are highly prone to injury. Understanding the mechanisms driving tendon fate would impact efforts to improve tendon healing, yet this knowledge is limited. To find direct regulators of tendon progenitor emergence, we performed a zebrafish high-throughput chemical screen. We established forskolin as a tenogenic inducer across vertebrates, functioning through Creb1a, which is required and sufficient for tendon fate. Putative enhancers containing cyclic AMP (cAMP) response elements (CREs) in humans, mice, and fish drove specific expression in zebrafish cranial and fin tendons. Analysis of these genomic regions identified motifs for early B cell factor (Ebf/EBF) transcription factors. Mutation of CRE or Ebf/EBF motifs significantly disrupted enhancer activity and specificity in tendons. Zebrafish ebf1a/ebf3a mutants displayed defects in tendon formation. Notably, Creb1a/CREB1 and Ebf1a/Ebf3a/EBF1 overexpression facilitated tenogenic induction in zebrafish and human pluripotent stem cells. Together, our work identifies the functional conservation of two transcription factors in promoting tendon fate.
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Affiliation(s)
- Xubo Niu
- Center for Regenerative Medicine, Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Delmy L Melendez
- Department of Orthopaedic Surgery, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Suyash Raj
- Department of Orthopaedic Surgery, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Junming Cai
- Department of Orthopaedic Surgery, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Dulanjalee Senadeera
- Department of Orthopaedic Surgery, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Joseph Mandelbaum
- Division of Hematology/Oncology, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Ilya A Shestopalov
- Division of Hematology/Oncology, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Scott D Martin
- Department of Sports Medicine, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Leonard I Zon
- Division of Hematology/Oncology, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA; Howard Hughes Medical Institute, Boston, MA, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA
| | - Thorsten M Schlaeger
- Division of Hematology/Oncology, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Lick Pui Lai
- Department of Stem Cell Biology and Regenerative Medicine, Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Andrew P McMahon
- Department of Stem Cell Biology and Regenerative Medicine, Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - April M Craft
- Department of Orthopaedic Surgery, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA.
| | - Jenna L Galloway
- Center for Regenerative Medicine, Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA.
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2
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Isaji M, Horiuchi K, Kondo S, Nakagawa T, Ishizaka T, Amako M, Chiba K. Suppression of TNF-α activity by immobilization rescues Mkx expression and attenuates tendon ossification in a mouse Achilles tenotomy model. J Orthop Res 2024. [PMID: 38806292 DOI: 10.1002/jor.25906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 04/20/2024] [Accepted: 05/13/2024] [Indexed: 05/30/2024]
Abstract
Traumatic heterotopic ossification is a condition in which extraskeletal bone formation occurs in soft tissues after injury. It most commonly occurs in patients who had major orthopedic surgery and in those with severe extremity injuries. The lesion causes local pain and can impair motor function of the affected limb, but there is currently no established prophylaxis or treatment for this condition. In this study, we show that immobilization at an early stage of the inflammatory response after injury can attenuate ossification formation in a murine Achilles tenotomy model. Gene expression analysis revealed a decrease in the expression of Tnf and an increase in the expression of Mkx, which encodes one of the master regulators of tendon differentiation, Mohawk. Notably, we found that TNF-α suppressed the expression of Mkx transcripts and accelerated the osteogenic differentiation of tendon-derived mesenchymal stem cells (MSCs), suggesting that TNF-α acts as a negative regulator of Mkx transcription. Consistent with these findings, pharmaceutical inhibition of TNF-α increased the expression of Mkx transcripts and suppressed bone formation in this mouse model. These findings reveal the previously unrecognized involvement of TNF-α in regulating tendon MSC fate through suppression of Mkx expression and suggest that TNF-α is a potential target for preventing traumatic heterotopic ossification.
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Affiliation(s)
- Masashi Isaji
- Department of Orthopedic Surgery, National Defense Medical College, Saitama, Japan
| | - Keisuke Horiuchi
- Department of Orthopedic Surgery, National Defense Medical College, Saitama, Japan
| | - Shinya Kondo
- Department of Orthopedic Surgery, National Defense Medical College, Saitama, Japan
| | - Takahiro Nakagawa
- Department of Orthopedic Surgery, National Defense Medical College, Saitama, Japan
| | - Takahiro Ishizaka
- Department of Orthopedic Surgery, National Defense Medical College, Saitama, Japan
| | - Masatoshi Amako
- Department of Rehabilitation Medicine, National Defense Medical College Hospital, Saitama, Japan
| | - Kazuhiro Chiba
- Department of Orthopedic Surgery, National Defense Medical College, Saitama, Japan
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3
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Wilson CA, Postlethwait JH. A maternal-to-zygotic-transition gene block on the zebrafish sex chromosome. G3 (BETHESDA, MD.) 2024; 14:jkae050. [PMID: 38466753 PMCID: PMC11075544 DOI: 10.1093/g3journal/jkae050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 02/22/2024] [Accepted: 03/01/2024] [Indexed: 03/13/2024]
Abstract
Wild zebrafish (Danio rerio) have a ZZ/ZW chromosomal sex-determination system with the major sex locus on the right arm of chromosome-4 (Chr4R) near the largest heterochromatic block in the genome, suggesting that Chr4R transcriptomics might differ from the rest of the genome. To test this hypothesis, we conducted an RNA-seq analysis of adult ZW ovaries and ZZ testes in the Nadia strain and identified 4 regions of Chr4 with different gene expression profiles. Unique in the genome, protein-coding genes in a 41.7 Mb section (Region-2) were expressed in testis but silent in ovary. The AB lab strain, which lacks sex chromosomes, verified this result, showing that testis-biased gene expression in Region-2 depends on gonad biology, not on sex-determining mechanism. RNA-seq analyses in female and male brains and livers validated reduced transcripts from Region-2 in somatic cells, but without sex specificity. Region-2 corresponds to the heterochromatic portion of Chr4R and its content of genes and repetitive elements distinguishes it from the rest of the genome. Region-2 lacks protein-coding genes with human orthologs; has zinc finger genes expressed early in zygotic genome activation; has maternal 5S rRNA genes, maternal spliceosome genes, a concentration of tRNA genes, and a distinct set of repetitive elements. The colocalization of (1) genes silenced in ovaries but not in testes that are (2) expressed in embryos briefly at the onset of zygotic genome activation; (3) maternal-specific genes for translation machinery; (4) maternal-specific spliceosome components; and (5) adjacent genes encoding miR-430, which mediates maternal transcript degradation, suggest that this is a maternal-to-zygotic-transition gene regulatory block.
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4
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Lynch CA, Acosta SA, Anderson DM, Rogers GE, Wilson-Rawls J, Rawls A. The Transcription Factor Mohawk Facilitates Skeletal Muscle Repair via Modulation of the Inflammatory Environment. Int J Mol Sci 2024; 25:5019. [PMID: 38732238 PMCID: PMC11084535 DOI: 10.3390/ijms25095019] [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: 03/23/2024] [Revised: 05/02/2024] [Accepted: 05/02/2024] [Indexed: 05/13/2024] Open
Abstract
Efficient repair of skeletal muscle relies upon the precise coordination of cells between the satellite cell niche and innate immune cells that are recruited to the site of injury. The expression of pro-inflammatory cytokines and chemokines such as TNFα, IFNγ, CXCL1, and CCL2, by muscle and tissue resident immune cells recruits neutrophils and M1 macrophages to the injury and activates satellite cells. These signal cascades lead to highly integrated temporal and spatial control of muscle repair. Despite the therapeutic potential of these factors for improving tissue regeneration after traumatic and chronic injuries, their transcriptional regulation is not well understood. The transcription factor Mohawk (Mkx) functions as a repressor of myogenic differentiation and regulates fiber type specification. Embryonically, Mkx is expressed in all progenitor cells of the musculoskeletal system and is expressed in human and mouse myeloid lineage cells. An analysis of mice deficient for Mkx revealed a delay in postnatal muscle repair characterized by impaired clearance of necrotic fibers and smaller newly regenerated fibers. Further, there was a delay in the expression of inflammatory signals such as Ccl2, Ifnγ, and Tgfß. This was coupled with impaired recruitment of pro-inflammatory macrophages to the site of muscle damage. These studies demonstrate that Mkx plays a critical role in adult skeletal muscle repair that is mediated through the initial activation of the inflammatory response.
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Affiliation(s)
- Cherie Alissa Lynch
- School of Life Sciences, Arizona State University, 427 E Tyler Mall, Tempe, AZ 85287, USA; (C.A.L.); (S.A.A.); (D.M.A.); (G.E.R.); (J.W.-R.)
- Molecular and Cellular Biology Graduate Program, Arizona State University, Tempe, AZ 85287, USA
| | - Sofia A. Acosta
- School of Life Sciences, Arizona State University, 427 E Tyler Mall, Tempe, AZ 85287, USA; (C.A.L.); (S.A.A.); (D.M.A.); (G.E.R.); (J.W.-R.)
- Molecular and Cellular Biology Graduate Program, Arizona State University, Tempe, AZ 85287, USA
| | - Douglas M. Anderson
- School of Life Sciences, Arizona State University, 427 E Tyler Mall, Tempe, AZ 85287, USA; (C.A.L.); (S.A.A.); (D.M.A.); (G.E.R.); (J.W.-R.)
- Molecular and Cellular Biology Graduate Program, Arizona State University, Tempe, AZ 85287, USA
| | - Gavin E. Rogers
- School of Life Sciences, Arizona State University, 427 E Tyler Mall, Tempe, AZ 85287, USA; (C.A.L.); (S.A.A.); (D.M.A.); (G.E.R.); (J.W.-R.)
- Molecular and Cellular Biology Graduate Program, Arizona State University, Tempe, AZ 85287, USA
| | - Jeanne Wilson-Rawls
- School of Life Sciences, Arizona State University, 427 E Tyler Mall, Tempe, AZ 85287, USA; (C.A.L.); (S.A.A.); (D.M.A.); (G.E.R.); (J.W.-R.)
| | - Alan Rawls
- School of Life Sciences, Arizona State University, 427 E Tyler Mall, Tempe, AZ 85287, USA; (C.A.L.); (S.A.A.); (D.M.A.); (G.E.R.); (J.W.-R.)
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Ghaffari MH, Sadri H, Trakooljul N, Koch C, Sauerwein H. Liver transcriptome profiles of dairy cows with different serum metabotypes. J Dairy Sci 2024; 107:1751-1765. [PMID: 37806621 DOI: 10.3168/jds.2023-23572] [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: 04/04/2023] [Accepted: 09/17/2023] [Indexed: 10/10/2023]
Abstract
In a previously established animal model, 38 multiparous Holstein cows were assigned to 2 groups fed different diets to achieve either a normal (NBCS) or high (HBCS) body condition score (BCS) and backfat thickness (BFT) until dry-off at -49 d before calving (NBCS: BCS <3.5 [3.02 ± 0.24) and BFT <1.2 cm [0.92 ± 0.21]; HBCS: BCS >3.75 [3.82 ± 0.33] and BFT >1.4 cm [2.36 ± 0.35], mean ± SD). The groups were also stratified for comparable milk yields (NBCS: 10,361 ± 302 kg; HBCS: 10,315 ± 437 kg; mean ± SD). The cows were then fed the same diet during the dry period and subsequent lactation, maintaining the differences in BFT and BCS throughout the study. Using the serum metabolomics data, we created a classification model that identified different metabotypes. Machine learning classifiers revealed a distinct cluster labeled HBCS-PN (HBCS predicted normal BCS) among over-conditioned cows. These cows showed higher feed intake and better energy balance than the HBCS-PH (high BCS predicted high BCS) group, while milk yield was similar. The aim of this study was to investigate the changes in the hepatic transcriptome of cows differing in serum-metabotype postpartum. We performed hepatic transcriptome analysis in cows from 3 metabolic clusters: HBCS-PH (n = 8), HBCS-PN (n = 6), and normal BCS predicted normal BCS (NBCS-PN, n = 8) on d 21 (±2) postpartum. Liver tissue from cows expressed a total of 13,118 genes aligned with the bovine genome. A total of 48 differentially expressed genes (DEG; false discovery rate ≤0.1 and fold-change >1.5) were found between NBCS-PN and HBCS-PH cows, whereas 24 DEG (14 downregulated and 10 upregulated) were found between HBCS-PN and HBCS-PH cows. The downregulated DEG (n = 31) in NBCS-PN cows compared with HBCS-PH cows are involved in biosynthetic processes such as lipid, lipoprotein, and cholesterol synthesis (e.g., APOA1, MKX, RPL3L, CANT1, CHPF, FUT1, ZNF696), cell organization, biogenesis, and localization (e.g., SLC12A8, APOA1, BRME1, RPL3L, STAG3, FBXW5, TMEM120A, SLC16A5, FGF21), catabolic processes (e.g., BREH1, MIOX, APOBEC2, FBXW5, NUDT16), and response to external stimuli (e.g., APOA1, FGF21, TMEM120A, FNDC4), whereas upregulated DEG (n = 17) are related to signal transduction and cell motility (e.g., RASSF2, ASPN, SGK1, KIF7, ZEB2, MAOA, ACKR4, TCAF1), suggesting altered metabolic adaptations during lactation. Our results showed 24 DEG between HBCS-PN and HBCS-PH in the liver. The expression of SLC12A8, SLC16A5, FBXW5, OSGIN1, LAMA3, KDELR3, OR4X17, and INHBE, which are responsible for regulating cellular processes was downregulated in HBCS-PN cows compared with HBCS-PH cows. In particular, the downregulation of SLC12A8 and SLC16A5 expression in HBCS-PN cows indicates lower metabolic load and reduced need for NAD+ biosynthesis to support mitochondrial respiratory processes. The upregulation of MAOA, ACKR4, KIF27, SFRP1, and CAV2 in the liver of HBCS-PN cows may indicate adaptive mechanisms to maintain normal liver function in response to increased metabolic demands from over-conditioning. These molecular differences underscore the existence of distinct metabolic types in cows and provide evidence for the role of the liver in shaping different metabolic patterns.
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Affiliation(s)
- M H Ghaffari
- Institute of Animal Science, Physiology Unit, University of Bonn, 53115 Bonn, Germany
| | - H Sadri
- Department of Clinical Science, Faculty of Veterinary Medicine, University of Tabriz, 516616471 Tabriz, Iran
| | - N Trakooljul
- Research Institute for Farm Animal Biology (FBN), Institute for Genome Biology, 18196 Dummerstorf, Germany
| | - C Koch
- Educational and Research Centre for Animal Husbandry, Hofgut Neumühle, 67728 Münchweiler an der Alsenz, Germany
| | - H Sauerwein
- Institute of Animal Science, Physiology Unit, University of Bonn, 53115 Bonn, Germany.
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6
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Wilson CA, Postlethwait JH. A maternal-to-zygotic-transition gene block on the zebrafish sex chromosome. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.12.06.570431. [PMID: 38106184 PMCID: PMC10723407 DOI: 10.1101/2023.12.06.570431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
Wild zebrafish (Danio rerio) have a ZZ/ZW chromosomal sex determination system with the major sex locus on the right arm of chromosome-4 (Chr4R) near the largest heterochromatic block in the genome, suggesting the hypothesis that the Chr4R transcriptome might be different from the rest of the genome. We conducted an RNA-seq analysis of adult ZW ovaries and ZZ testes and identified four regions of Chr4 with different gene expression profiles. Unique in the genome, protein-coding genes in a 41.7 Mb section (Region-2) were expressed in testis but silent in ovary. The AB lab strain, which lacks sex chromosomes, verified this result, showing that testis-biased gene expression in Region-2 depends on gonad biology, not on sex-determining mechanism. RNA-seq analyses in female and male brain and liver validated few transcripts from Region-2 in somatic cells, but without sex-specificity. Region-2 corresponds to the heterochromatic portion of Chr4R and its content of genes and repetitive elements distinguishes it from the rest of the genome. In Region-2, protein-coding genes lack human orthologs; it has zinc finger genes expressed early in zygotic genome activation; it has maternal 5S rRNA genes, maternal spliceosome genes, a concentration of tRNA genes, and an distinct set of repetitive elements. The colocalization of 1) genes silenced in ovaries but not in testes that are 2) expressed in embryos briefly at the onset of zygotic genome activation; 3) maternal-specific genes for translation machinery; 4) maternal-specific spliceosome components; and 4) adjacent genes encoding miR-430, which mediates maternal transcript degradation, suggest that this is a Maternal-to-Zygotic-Transition Gene Regulatory Block.
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7
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Loder S, Patel N, Morgani S, Sambon M, Leucht P, Levi B. Genetic models for lineage tracing in musculoskeletal development, injury, and healing. Bone 2023; 173:116777. [PMID: 37156345 PMCID: PMC10860167 DOI: 10.1016/j.bone.2023.116777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 04/07/2023] [Accepted: 04/17/2023] [Indexed: 05/10/2023]
Abstract
Musculoskeletal development and later post-natal homeostasis are highly dynamic processes, marked by rapid structural and functional changes across very short periods of time. Adult anatomy and physiology are derived from pre-existing cellular and biochemical states. Consequently, these early developmental states guide and predict the future of the system as a whole. Tools have been developed to mark, trace, and follow specific cells and their progeny either from one developmental state to the next or between circumstances of health and disease. There are now many such technologies alongside a library of molecular markers which may be utilized in conjunction to allow for precise development of unique cell 'lineages'. In this review, we first describe the development of the musculoskeletal system beginning as an embryonic germ layer and at each of the key developmental stages that follow. We then discuss these structures in the context of adult tissues during homeostasis, injury, and repair. Special focus is given in each of these sections to the key genes involved which may serve as markers of lineage or later in post-natal tissues. We then finish with a technical assessment of lineage tracing and the techniques and technologies currently used to mark cells, tissues, and structures within the musculoskeletal system.
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Affiliation(s)
- Shawn Loder
- Department of Plastic Surgery, University of Pittsburgh, Scaife Hall, Suite 6B, 3550 Terrace Street, Pittsburgh, PA 15261, USA
| | - Nicole Patel
- Center for Organogenesis and Trauma, Department of Surgery, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | | | | | | | - Benjamin Levi
- Center for Organogenesis and Trauma, Department of Surgery, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
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Marr N, Zamboulis DE, Werling D, Felder AA, Dudhia J, Pitsillides AA, Thorpe CT. The tendon interfascicular basement membrane provides a vascular niche for CD146+ cell subpopulations. Front Cell Dev Biol 2023; 10:1094124. [PMID: 36699014 PMCID: PMC9869387 DOI: 10.3389/fcell.2022.1094124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 12/23/2022] [Indexed: 01/11/2023] Open
Abstract
Introduction: The interfascicular matrix (IFM; also known as the endotenon) is critical to the mechanical adaptations and response to load in energy-storing tendons, such as the human Achilles and equine superficial digital flexor tendon (SDFT). We hypothesized that the IFM is a tendon progenitor cell niche housing an exclusive cell subpopulation. Methods: Immunolabelling of equine superficial digital flexor tendon was used to identify the interfascicular matrix niche, localising expression patterns of CD31 (endothelial cells), Desmin (smooth muscle cells and pericytes), CD146 (interfascicular matrix cells) and LAMA4 (interfascicular matrix basement membrane marker). Magnetic-activated cell sorting was employed to isolate and compare in vitro properties of CD146+ and CD146- subpopulations. Results: Labelling for CD146 using standard histological and 3D imaging of large intact 3D segments revealed an exclusive interfascicular cell subpopulation that resides in proximity to a basal lamina which forms extensive, interconnected vascular networks. Isolated CD146+ cells exhibited limited mineralisation (osteogenesis) and lipid production (adipogenesis). Discussion: This study demonstrates that the interfascicular matrix is a unique tendon cell niche, containing a vascular-rich network of basement membrane, CD31+ endothelial cells, Desmin+ mural cells, and CD146+ cell populations that are likely essential to tendon structure and/or function. Contrary to our hypothesis, interfascicular CD146+ subpopulations did not exhibit stem cell-like phenotypes. Instead, our results indicate CD146 as a pan-vascular marker within the tendon interfascicular matrix. Together with previous work demonstrating that endogenous tendon CD146+ cells migrate to sites of injury, our data suggest that their mobilisation to promote intrinsic repair involves changes in their relationships with local interfascicular matrix vascular and basement membrane constituents.
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Affiliation(s)
- Neil Marr
- Comparative Biomedical Sciences, Royal Veterinary College, London, United Kingdom
| | - Danae E. Zamboulis
- Comparative Biomedical Sciences, Royal Veterinary College, London, United Kingdom
| | - Dirk Werling
- Pathobiology and Population Sciences, Centre for Vaccinology and Regenerative Medicine, Royal Veterinary College, Hatfield, United Kingdom
| | - Alessandro A. Felder
- Research Software Development Group, Advanced Research Computing, University College London, London, United Kingdom
| | - Jayesh Dudhia
- Clinical Sciences and Services, Royal Veterinary College, Hatfield, United Kingdom
| | | | - Chavaunne T. Thorpe
- Comparative Biomedical Sciences, Royal Veterinary College, London, United Kingdom
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9
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Amini M, Venkatesan JK, Liu W, Leroux A, Nguyen TN, Madry H, Migonney V, Cucchiarini M. Advanced Gene Therapy Strategies for the Repair of ACL Injuries. Int J Mol Sci 2022; 23:ijms232214467. [PMID: 36430947 PMCID: PMC9695211 DOI: 10.3390/ijms232214467] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 11/07/2022] [Accepted: 11/19/2022] [Indexed: 11/23/2022] Open
Abstract
The anterior cruciate ligament (ACL), the principal ligament for stabilization of the knee, is highly predisposed to injury in the human population. As a result of its poor intrinsic healing capacities, surgical intervention is generally necessary to repair ACL lesions, yet the outcomes are never fully satisfactory in terms of long-lasting, complete, and safe repair. Gene therapy, based on the transfer of therapeutic genetic sequences via a gene vector, is a potent tool to durably and adeptly enhance the processes of ACL repair and has been reported for its workability in various experimental models relevant to ACL injuries in vitro, in situ, and in vivo. As critical hurdles to the effective and safe translation of gene therapy for clinical applications still remain, including physiological barriers and host immune responses, biomaterial-guided gene therapy inspired by drug delivery systems has been further developed to protect and improve the classical procedures of gene transfer in the future treatment of ACL injuries in patients, as critically presented here.
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Affiliation(s)
- Mahnaz Amini
- Center of Experimental Orthopaedics, Saarland University Medical Center, Kirrbergerstr. Bldg 37, D-66421 Homburg, Germany
| | - Jagadeesh K. Venkatesan
- Center of Experimental Orthopaedics, Saarland University Medical Center, Kirrbergerstr. Bldg 37, D-66421 Homburg, Germany
| | - Wei Liu
- Center of Experimental Orthopaedics, Saarland University Medical Center, Kirrbergerstr. Bldg 37, D-66421 Homburg, Germany
| | - Amélie Leroux
- Laboratoire CSPBAT UMR CNRS 7244, Université Sorbonne Paris Nord, Avenue JB Clément, 93430 Villetaneuse, France
| | - Tuan Ngoc Nguyen
- Laboratoire CSPBAT UMR CNRS 7244, Université Sorbonne Paris Nord, Avenue JB Clément, 93430 Villetaneuse, France
| | - Henning Madry
- Center of Experimental Orthopaedics, Saarland University Medical Center, Kirrbergerstr. Bldg 37, D-66421 Homburg, Germany
| | - Véronique Migonney
- Laboratoire CSPBAT UMR CNRS 7244, Université Sorbonne Paris Nord, Avenue JB Clément, 93430 Villetaneuse, France
| | - Magali Cucchiarini
- Center of Experimental Orthopaedics, Saarland University Medical Center, Kirrbergerstr. Bldg 37, D-66421 Homburg, Germany
- Correspondence: or
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Yoshimoto Y, Uezumi A, Ikemoto-Uezumi M, Tanaka K, Yu X, Kurosawa T, Yambe S, Maehara K, Ohkawa Y, Sotomaru Y, Shukunami C. Tenogenic Induction From Induced Pluripotent Stem Cells Unveils the Trajectory Towards Tenocyte Differentiation. Front Cell Dev Biol 2022; 10:780038. [PMID: 35372337 PMCID: PMC8965463 DOI: 10.3389/fcell.2022.780038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Accepted: 02/09/2022] [Indexed: 12/27/2022] Open
Abstract
The musculoskeletal system is integrated by tendons that are characterized by the expression of scleraxis (Scx), a functionally important transcription factor. Here, we newly developed a tenocyte induction method using induced pluripotent stem cells established from ScxGFP transgenic mice by monitoring fluorescence, which reflects a dynamic differentiation process. Among several developmentally relevant factors, transforming growth factor-beta 2 (TGF-β2) was the most potent inducer for differentiation of tenomodulin-expressing mature tenocytes. Single-cell RNA sequencing (scRNA-seq) revealed 11 distinct clusters, including mature tenocyte population and tenogenic differentiation trajectory, which recapitulated the in vivo developmental process. Analysis of the scRNA-seq dataset highlighted the importance of retinoic acid (RA) as a regulatory pathway of tenogenic differentiation. RA signaling was shown to have inhibitory effects on entheseal chondrogenic differentiation as well as TGF-β2-dependent tenogenic/fibrochondrogenic differentiation. The collective findings provide a new opportunity for tendon research and further insight into the mechanistic understanding of the differentiation pathway to a tenogenic fate.
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Affiliation(s)
- Yuki Yoshimoto
- Department of Molecular Biology and Biochemistry, Biomedical Sciences Major, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
- Muscle Aging and Regenerative Medicine, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - Akiyoshi Uezumi
- Muscle Aging and Regenerative Medicine, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
- *Correspondence: Chisa Shukunami, ; Akiyoshi Uezumi,
| | - Madoka Ikemoto-Uezumi
- Muscle Aging and Regenerative Medicine, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - Kaori Tanaka
- Division of Transcriptomics, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan
| | - Xinyi Yu
- Department of Molecular Biology and Biochemistry, Biomedical Sciences Major, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Tamaki Kurosawa
- Muscle Aging and Regenerative Medicine, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
- Laboratory of Veterinary Pharmacology, Department of Veterinary Medical Sciences, Graduate School of Agriculture and Life Sciences, Tokyo University, Tokyo, Japan
| | - Shinsei Yambe
- Department of Molecular Biology and Biochemistry, Biomedical Sciences Major, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Kazumitsu Maehara
- Division of Transcriptomics, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan
| | - Yasuyuki Ohkawa
- Division of Transcriptomics, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan
| | - Yusuke Sotomaru
- Natural Science Center for Basic Research and Development, Hiroshima University, Hiroshima, Japan
| | - Chisa Shukunami
- Department of Molecular Biology and Biochemistry, Biomedical Sciences Major, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
- *Correspondence: Chisa Shukunami, ; Akiyoshi Uezumi,
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11
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He P, Ruan D, Huang Z, Wang C, Xu Y, Cai H, Liu H, Fei Y, Heng BC, Chen W, Shen W. Comparison of Tendon Development Versus Tendon Healing and Regeneration. Front Cell Dev Biol 2022; 10:821667. [PMID: 35141224 PMCID: PMC8819183 DOI: 10.3389/fcell.2022.821667] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 01/07/2022] [Indexed: 12/27/2022] Open
Abstract
Tendon is a vital connective tissue in human skeletal muscle system, and tendon injury is very common and intractable in clinic. Tendon development and repair are two closely related but still not fully understood processes. Tendon development involves multiple germ layer, as well as the regulation of diversity transcription factors (Scx et al.), proteins (Tnmd et al.) and signaling pathways (TGFβ et al.). The nature process of tendon repair is roughly divided in three stages, which are dominated by various cells and cell factors. This review will describe the whole process of tendon development and compare it with the process of tendon repair, focusing on the understanding and recent advances in the regulation of tendon development and repair. The study and comparison of tendon development and repair process can thus provide references and guidelines for treatment of tendon injuries.
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Affiliation(s)
- Peiwen He
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, China
- Institute of Sports Medicine, Zhejiang University, Hangzhou, China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou, China
| | - Dengfeng Ruan
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, China
- Institute of Sports Medicine, Zhejiang University, Hangzhou, China
| | - Zizhan Huang
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, China
- Institute of Sports Medicine, Zhejiang University, Hangzhou, China
| | - Canlong Wang
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, China
- Institute of Sports Medicine, Zhejiang University, Hangzhou, China
| | - Yiwen Xu
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, China
- Institute of Sports Medicine, Zhejiang University, Hangzhou, China
| | - Honglu Cai
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, China
- Institute of Sports Medicine, Zhejiang University, Hangzhou, China
| | - Hengzhi Liu
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, China
- Institute of Sports Medicine, Zhejiang University, Hangzhou, China
| | - Yang Fei
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, China
- Institute of Sports Medicine, Zhejiang University, Hangzhou, China
| | - Boon Chin Heng
- Central Laboratory, Peking University School of Stomatology, Bejing, China
| | - Weishan Chen
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, China
- Institute of Sports Medicine, Zhejiang University, Hangzhou, China
- *Correspondence: Weishan Chen, ; Weiliang Shen,
| | - Weiliang Shen
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, China
- Institute of Sports Medicine, Zhejiang University, Hangzhou, China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou, China
- Dr. Li Dak Sum and Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Zhejiang University, Hangzhou, China
- China Orthopaedic Regenerative Medicine (CORMed), Hangzhou, China
- *Correspondence: Weishan Chen, ; Weiliang Shen,
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12
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Anderson KM, Anderson DM. LncRNAs at the heart of development and disease. Mamm Genome 2022; 33:354-365. [PMID: 35048139 DOI: 10.1007/s00335-021-09937-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 11/26/2021] [Indexed: 10/19/2022]
Abstract
Long noncoding RNAs (LncRNAs) have emerged as a diverse class of functional molecules that contribute to nearly every facet of mammalian cardiac development and disease. Recent examples show that lncRNAs can be important co-regulators of cardiac patterning and morphogenesis and modulators of the pathogenic signaling that drives heart disease. The flexibility and chemical nature of RNA allows lncRNAs to utilize diverse mechanisms, mediating their effects through their sequence, structure, and molecular interactions with DNA, protein, and other RNAs. In vivo, i.e., animal, studies of individual lncRNAs highlight their ability to balance conserved cardiac gene expression networks, serve as specific and early biomarkers, and indicate their promise as useful therapeutic targets to treat human heart disease. Here, we review recent functionally characterized lncRNAs in cardiac biology and pathology and provide a perspective on emerging approaches to decipher the role of lncRNAs in the heart.
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Affiliation(s)
- Kelly M Anderson
- Department of Medicine, Cardiovascular Research Institute, University of Rochester Medical Center, 601 Elmwood Avenue, Box CVRI, Rochester, NY, 14642, USA
| | - Douglas M Anderson
- Department of Medicine, Cardiovascular Research Institute, University of Rochester Medical Center, 601 Elmwood Avenue, Box CVRI, Rochester, NY, 14642, USA.
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13
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Fang F, Sup M, Luzzi A, Ferrer X, Thomopoulos S. Hedgehog signaling underlying tendon and enthesis development and pathology. Matrix Biol 2022; 105:87-103. [PMID: 34954379 PMCID: PMC8821161 DOI: 10.1016/j.matbio.2021.12.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 12/18/2021] [Accepted: 12/19/2021] [Indexed: 02/08/2023]
Abstract
Hedgehog (Hh) signaling has been widely acknowledged to play essential roles in many developmental processes, including endochondral ossification and growth plate maintenance. Furthermore, a rising number of studies have shown that Hh signaling is necessary for tendon enthesis development. Specifically, the well-tuned regulation of Hh signaling during development drives the formation of a mineral gradient across the tendon enthesis fibrocartilage. However, aberrant Hh signaling can also lead to pathologic heterotopic ossification in tendon or osteophyte formation at the enthesis. Therefore, the therapeutic potential of Hh signaling modulation for treating tendon and enthesis diseases remains uncertain. For example, increased Hh signaling may enhance tendon-to-bone healing by promoting the formation of mineralized fibrocartilage at the healing interface, but pathologic heterotopic ossification may also be triggered in the adjacent tendon. Further work is needed to elucidate the distinct functions of Hh signaling in the tendon and enthesis to support the development of therapies that target the pathway.
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Affiliation(s)
- Fei Fang
- Department of Orthopedic Surgery, Columbia University, Black Building, Room 1408, 650W 168 ST, New York, NY 10032-3702, United States
| | - McKenzie Sup
- Department of Biomedical Engineering, Columbia University, New York, NY, United States
| | - Andrew Luzzi
- Department of Orthopedic Surgery, Columbia University, Black Building, Room 1408, 650W 168 ST, New York, NY 10032-3702, United States
| | - Xavier Ferrer
- Department of Orthopedic Surgery, Columbia University, Black Building, Room 1408, 650W 168 ST, New York, NY 10032-3702, United States
| | - Stavros Thomopoulos
- Department of Orthopedic Surgery, Columbia University, Black Building, Room 1408, 650W 168 ST, New York, NY 10032-3702, United States; Department of Biomedical Engineering, Columbia University, New York, NY, United States.
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14
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Stevenson AW, Melton PE, Moses EK, Wallace HJ, Wood FM, Rea S, Danielsen PL, Alghamdi M, Hortin N, Borowczyk J, Deng Z, Manzur M, Fear MW. A methylome and transcriptome analysis of normal human scar cells reveals a role for FOXF2 in scar maintenance. J Invest Dermatol 2021; 142:1489-1498.e12. [PMID: 34687743 DOI: 10.1016/j.jid.2021.08.445] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 07/22/2021] [Accepted: 08/01/2021] [Indexed: 12/12/2022]
Abstract
Scar is maintained for life and increases in size during periods of growth such as puberty. Epigenetic changes in fibroblasts after injury may underpin the maintenance and growth of scar. Here, we, combined methylome and transcriptome data from normotrophic mature scar and contralateral uninjured normal skin fibroblasts to identify potential regulators of scar maintenance. 219 significantly differentially expressed and 1199 significantly differentially methylated promoters were identified, of which there were 12 genes both significantly differentially methylated and expressed. Of these the two transcription factors, Forkhead Box F2 (FOXF2) and Mohawk Homeobox (MKX) were selected for further analysis. Immunocytochemistry and qPCR suggested FOXF2 but not MKX had elevated expression in scar fibroblasts. Using RNASeq, FOXF2 knockdown was shown to significantly reduce expression of extracellular matrix related genes, whilst MKX did not appear to affect similar pathways. Finally, FOXF2 knockdown was also shown to significantly decrease collagen I production in scar and keloid fibroblasts. This study provides insights into the maintenance of normotrophic scar, suggesting FOXF2 is an important regulator of this process. Targeting genes responsible for maintenance of scar phenotype may ameliorate scar appearance and improve patient outcomes in the future.
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Affiliation(s)
- Andrew W Stevenson
- Burn Injury Research Unit, School of Biomedical Sciences, Faculty of Health and Medical Sciences, The University of Western Australia, Perth, Australia.
| | - Phillip E Melton
- School of Population and Global Health, The University of Western Australia, Perth, Australia; School of Pharmacy and Biomedical Sciences, Faculty of Health Sciences, Curtin University, Perth, Australia; Menzies Research Institute, University of Tasmania, Hobart, Tasmania, Australia
| | - Eric K Moses
- School of Pharmacy and Biomedical Sciences, Faculty of Health Sciences, Curtin University, Perth, Australia; Menzies Research Institute, University of Tasmania, Hobart, Tasmania, Australia; School of Biomedical Sciences, University of Western Australia, Crawley, Western Australia, Australia
| | - Hilary J Wallace
- Burn Injury Research Unit, School of Biomedical Sciences, Faculty of Health and Medical Sciences, The University of Western Australia, Perth, Australia; School of Medicine, The University of Notre Dame Australia, Fremantle, Australia
| | - Fiona M Wood
- Burn Injury Research Unit, School of Biomedical Sciences, Faculty of Health and Medical Sciences, The University of Western Australia, Perth, Australia; Burns Service of Western Australia, Perth Children's Hospital and Fiona Stanley Hospital, Perth, Australia
| | - Suzanne Rea
- Burns Service of Western Australia, Perth Children's Hospital and Fiona Stanley Hospital, Perth, Australia
| | - Patricia L Danielsen
- Department of Dermatology and Copenhagen Wound Healing Center, Copenhagen University Hospital, Copenhagen, Denmark
| | - Mansour Alghamdi
- Department of Anatomy, College of Medicine, King Khalid University, Abha, Saudi Arabia; Genomics and Personalised Medicine Unit, College of Medicine, King Khalid University, Abha, Saudi Arabia
| | - Nicole Hortin
- Burn Injury Research Unit, School of Biomedical Sciences, Faculty of Health and Medical Sciences, The University of Western Australia, Perth, Australia
| | - Julia Borowczyk
- Department of Pathology and Immunology, University of Geneva, Geneva, Switzerland
| | - Zhenjun Deng
- Burn Injury Research Unit, School of Biomedical Sciences, Faculty of Health and Medical Sciences, The University of Western Australia, Perth, Australia
| | - Mitali Manzur
- Telethon Kids Institute, Northern Entrance, Perth Children's Hospital, Nedlands, Australia
| | - Mark W Fear
- Burn Injury Research Unit, School of Biomedical Sciences, Faculty of Health and Medical Sciences, The University of Western Australia, Perth, Australia
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15
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Chen G, Fan D, Zhang W, Wang S, Gu J, Gao Y, He L, Li W, Zhang C, Li M, Zhang Y, Liu Z, Hao Q. Mkx mediates tenogenic differentiation but incompletely inhibits the proliferation of hypoxic MSCs. Stem Cell Res Ther 2021; 12:426. [PMID: 34321079 PMCID: PMC8317301 DOI: 10.1186/s13287-021-02506-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 07/11/2021] [Indexed: 02/08/2023] Open
Abstract
Background Hypoxia has been shown to be able to induce tenogenic differentiation and proliferation of mesenchymal stem cells (MSCs) which lead hypoxia-induced MSCs to be a potential treatment for tendon injury. However, little is known about the mechanism underlying the tenogenic differentiation and proliferation process of hypoxic MSCs, which limited the application of differentiation-inducing therapies in tendon repair. This study was designed to investigate the role of Mohawk homeobox (Mkx) in tenogenic differentiation and proliferation of hypoxic MSCs. Methods qRT-PCR, western blot, and immunofluorescence staining were performed to evaluate the expression of Mkx and other tendon-associated markers in adipose-derived MSCs (AMSCs) and bone marrow-derived MSCs (BMSCs) under hypoxia condition. Small interfering RNA technique was applied to observe the effect of Mkx levels on the expression of tendon-associated markers in normoxic and hypoxic BMSCs. Hypoxic BMSCs infected with Mkx-specific short hair RNA (shRNA) or scramble were implanted into the wound gaps of injured patellar tendons to assess the effect of Mkx levels on tendon repair. In addition, cell counting kit-8 assay, colony formation unit assay, cell cycle analysis, and EdU assay were adopted to determine the proliferation capacity of normoxic or hypoxic BMSCs infected with or without Mkx-specific shRNA. Results Our data showed that the expression of Mkx significantly increased in hypoxic AMSCs and increased much higher in hypoxic BMSCs. Our results also detected that the expression of tenogenic differentiation markers after downregulation of Mkx were significantly decreased not only in normoxic BMSCs, but also in hypoxic BMSCs which paralleled the inferior histological evidences, worse biomechanical properties, and smaller diameters of collagen fibrils in vivo. In addition, our in vitro data demonstrated that the optical density values, the clone numbers, the percentage of cells in S phage, and cell proliferation potential of both normoxic and hypoxic BMSCs were all significantly increased after knockdown of Mkx and were also significantly enhanced in both AMSCs and BMSCs in hypoxia condition under which the expression of Mkx was upregulated. Conclusions These findings strongly suggested that Mkx mediated hypoxia-induced tenogenic differentiation of MSCs but could not completely repress the proliferation of hypoxic MSCs. Supplementary Information The online version contains supplementary material available at 10.1186/s13287-021-02506-3.
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Affiliation(s)
- Guanyin Chen
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Dong Fan
- Department of General Surgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Wangqian Zhang
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Shuning Wang
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Jintao Gu
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Yuan Gao
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Lei He
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Weina Li
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Cun Zhang
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Meng Li
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Yingqi Zhang
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Zhaohui Liu
- Department of Rehabilitation and Physiotherapy, Tangdu Hospital, Fourth Military Medical University, Xi'an, China.
| | - Qiang Hao
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, Fourth Military Medical University, Xi'an, China.
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16
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Ide K, Takahashi S, Sakai K, Taga Y, Ueno T, Dickens D, Jenkins R, Falciani F, Sasaki T, Ooi K, Kawashiri S, Mizuno K, Hattori S, Sakai T. The dipeptide prolyl-hydroxyproline promotes cellular homeostasis and lamellipodia-driven motility via active β1-integrin in adult tendon cells. J Biol Chem 2021; 297:100819. [PMID: 34029590 PMCID: PMC8239475 DOI: 10.1016/j.jbc.2021.100819] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 05/08/2021] [Accepted: 05/20/2021] [Indexed: 12/14/2022] Open
Abstract
Collagen-derived hydroxyproline (Hyp)-containing peptides have a variety of biological effects on cells. These bioactive collagen peptides are locally generated by the degradation of endogenous collagen in response to injury. However, no comprehensive study has yet explored the functional links between Hyp-containing peptides and cellular behavior. Here, we show that the dipeptide prolyl-4-hydroxyproline (Pro-Hyp) exhibits pronounced effects on mouse tendon cells. Pro-Hyp promotes differentiation/maturation of tendon cells with modulation of lineage-specific factors and induces significant chemotactic activity in vitro. In addition, Pro-Hyp has profound effects on cell proliferation, with significantly upregulated extracellular signal-regulated kinase phosphorylation and extracellular matrix production and increased type I collagen network organization. Using proteomics, we have predicted molecular transport, cellular assembly and organization, and cellular movement as potential linked-network pathways that could be altered in response to Pro-Hyp. Mechanistically, cells treated with Pro-Hyp demonstrate increased directional persistence and significantly increased directed motility and migration velocity. They are accompanied by elongated lamellipodial protrusions with increased levels of active β1-integrin-containing focal contacts, as well as reorganization of thicker peripheral F-actin fibrils. Pro-Hyp-mediated chemotactic activity is significantly reduced (p < 0.001) in cells treated with the mitogen-activated protein kinase kinase 1/2 inhibitor PD98059 or the α5β1-integrin antagonist ATN-161. Furthermore, ATN-161 significantly inhibits uptake of Pro-Hyp into adult tenocytes. Thus, our findings document the molecular basis of the functional benefits of the Pro-Hyp dipeptide in cellular behavior. These dynamic properties of collagen-derived Pro-Hyp dipeptide could lead the way to its application in translational medicine.
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Affiliation(s)
- Kentaro Ide
- Department of Pharmacology and Therapeutics, MRC Centre for Drug Safety Science, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool, UK
| | - Sanai Takahashi
- Department of Pharmacology and Therapeutics, MRC Centre for Drug Safety Science, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool, UK
| | - Keiko Sakai
- Department of Pharmacology and Therapeutics, MRC Centre for Drug Safety Science, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool, UK
| | - Yuki Taga
- Nippi Research Institute of Biomatrix, Toride, Ibaraki, Japan
| | - Tomonori Ueno
- Nippi Research Institute of Biomatrix, Toride, Ibaraki, Japan
| | - David Dickens
- Department of Pharmacology and Therapeutics, MRC Centre for Drug Safety Science, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool, UK
| | - Rosalind Jenkins
- Department of Pharmacology and Therapeutics, MRC Centre for Drug Safety Science, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool, UK
| | - Francesco Falciani
- Department of Biochemistry and Systems Biology, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool, UK
| | - Takako Sasaki
- Department of Biochemistry, Faculty of Medicine, Oita University, Oita, Japan
| | - Kazuhiro Ooi
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa, Japan
| | - Shuichi Kawashiri
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa, Japan
| | - Kazunori Mizuno
- Nippi Research Institute of Biomatrix, Toride, Ibaraki, Japan
| | - Shunji Hattori
- Nippi Research Institute of Biomatrix, Toride, Ibaraki, Japan
| | - Takao Sakai
- Department of Pharmacology and Therapeutics, MRC Centre for Drug Safety Science, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool, UK.
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17
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Abe S, Yamamoto M. Factors Involved in Morphogenesis in the Muscle-Tendon-Bone Complex. Int J Mol Sci 2021; 22:6365. [PMID: 34198655 PMCID: PMC8232103 DOI: 10.3390/ijms22126365] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 06/12/2021] [Accepted: 06/12/2021] [Indexed: 12/13/2022] Open
Abstract
A decline in the body's motor functions has been linked to decreased muscle mass and function in the oral cavity and throat; however, aging of the junctions of the muscles and bones has also been identified as an associated factor. Basic and clinical studies on the muscles, tendons and bones, each considered independently, have been published. In recent years, however, research has focused on muscle attachment as the muscle-tendon-bone complex from various perspectives, and there is a growing body of knowledge on SRY-box9 (Sox9) and Mohawk(Mkx), which has been identified as a common controlling factor and a key element. Myostatin, a factor that inhibits muscle growth, has been identified as a potential key element in the mechanisms of lifetime structural maintenance of the muscle-tendon-bone complex. Findings in recent studies have also uncovered aspects of the mechanisms of motor organ complex morphostasis in the superaged society of today and will lay the groundwork for treatments to prevent motor function decline in older adults.
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Affiliation(s)
- Shinichi Abe
- Department of Anatomy, Tokyo Dental College, 2-9-18 Kanda-misakicho, Chiyoda-ku, Tokyo 101-0061, Japan;
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18
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Li Y, Wu T, Liu S. Identification and Distinction of Tenocytes and Tendon-Derived Stem Cells. Front Cell Dev Biol 2021; 9:629515. [PMID: 33937230 PMCID: PMC8085586 DOI: 10.3389/fcell.2021.629515] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Accepted: 03/29/2021] [Indexed: 01/01/2023] Open
Abstract
Restoring the normal structure and function of injured tendons is one of the biggest challenges in orthopedics and sports medicine department. The discovery of tendon-derived stem cells (TDSCs) provides a novel perspective to treat tendon injuries, which is expected to be an ideal seed cell to promote tendon repair and regeneration. Because of the lack of specific markers, the identification of tenocytes and TDSCs has not been conclusive in the in vitro study of tendons. In addition, the morphology of tendon derived cells is similar, and the comparison and identification of tenocytes and TDSCs are insufficient, which causes some obstacles to the in vitro study of tendon. In this review, the characteristics of tenocytes and TDSCs are summarized and compared based on some existing research results (mainly in terms of biomarkers), and a potential marker selection for identification is suggested. It is of profound significance to further explore the mechanism of biomarkers in vivo and to find more specific markers.
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Affiliation(s)
- Yuange Li
- Department of Orthopaedics, Shanghai Sixth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Tianyi Wu
- Department of Orthopaedics, Shanghai Sixth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Shen Liu
- Department of Orthopaedics, Shanghai Sixth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
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19
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Nakamichi R, Asahara H. Regulation of tendon and ligament differentiation. Bone 2021; 143:115609. [PMID: 32829041 PMCID: PMC7770025 DOI: 10.1016/j.bone.2020.115609] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 08/06/2020] [Accepted: 08/17/2020] [Indexed: 02/08/2023]
Abstract
Tendons transmit power from muscles to bones, and ligaments maintain the stability of joints, thus producing smooth and flexible movements of articular joints. However, tendons have poor self-healing ability upon damage due to injuries, diseases, or aging. To maintain homeostasis or promote regeneration of the tendon/ligament, it is critical to understand the mechanism responsible for the coordination of tendon/ligament-specific gene expression and subsequent cell differentiation. In this review, we have discussed the core molecular mechanisms involved in the development and homeostasis of tendons and ligaments, with particular focus on transcription factors, signaling, and mechanical stress.
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Affiliation(s)
- Ryo Nakamichi
- Department of Molecular Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, MBB-102, , La Jolla, CA 92037, USA; Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan
| | - Hiroshi Asahara
- Department of Molecular Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, MBB-102, , La Jolla, CA 92037, USA; Department of Systems Biomedicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan.
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20
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Nakamichi R, Asahara H. The transcription factors regulating intervertebral disc development. JOR Spine 2020; 3:e1081. [PMID: 32211592 PMCID: PMC7084052 DOI: 10.1002/jsp2.1081] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 01/22/2020] [Accepted: 02/01/2020] [Indexed: 01/06/2023] Open
Abstract
Damage to the intervertebral discs (IVDs) occurs due to aging or excessive mechanical stress, causing a series of IVD-related degenerative diseases, such as spinal disc herniation and spondylosis. These IVD-related diseases are difficult to cure, partially because the regeneration ability of IVDs is not sufficient. As a novel strategy for treatment of IVD-related diseases, mesenchymal stem cell transplantation to the damaged discs has been reported in animal studies. To further develop and improve this approach, it is necessary to gain a better understanding of the molecular network regulating IVD development by critical transcription factors. Recent findings reveal that during IVD development, nucleus pulposus and annuls fibrosus differentiation is coordinated by a series of transcription factors, such as Mkx, Pax1, 9, Shh, Foxa1, 2, T-Brachyury, and Sox5, 6, 9. The combination of mesenchymal stem cell transplantation with the regulation of these molecules may provide a novel strategy for treatment of degenerative disc diseases.
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Affiliation(s)
- Ryo Nakamichi
- Department of Molecular and Experimental MedicineThe Scripps Research InstituteLa JollaCalifornia
- Department of Orthopaedic SurgeryOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesOkayamaJapan
| | - Hiroshi Asahara
- Department of Molecular and Experimental MedicineThe Scripps Research InstituteLa JollaCalifornia
- Department of Systems BiomedicineTokyo Medical and Dental UniversityTokyoJapan
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21
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Gondek M, Herosimczyk A, Knysz P, Ożgo M, Lepczyński A, Szkucik K. Comparative Proteomic Analysis of Serum from Pigs Experimentally Infected with Trichinella spiralis, Trichinella britovi, and Trichinella pseudospiralis. Pathogens 2020; 9:pathogens9010055. [PMID: 31940868 PMCID: PMC7168678 DOI: 10.3390/pathogens9010055] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 01/05/2020] [Accepted: 01/09/2020] [Indexed: 12/14/2022] Open
Abstract
Although the available proteomic studies have made it possible to identify and characterize Trichinella stage-specific proteins reacting with infected host-specific antibodies, the vast majority of these studies do not provide any information about changes in the global proteomic serum profile of Trichinella-infested individuals. In view of the above, the present study aimed to examine the protein expression profile of serum obtained at 13 and 60 days postinfection (d.p.i.) from three groups of pigs experimentally infected with Trichinella spiralis, Trichinella britovi, and Trichinella pseudospiralis and from uninfected, control pigs by two-dimensional gel electrophoresis (2-DE) followed by matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry. The comparative proteomic analysis of the T. spiralis group vs. the control group revealed 5 differently expressed spots at both 13 and 60 d.p.i. Experimental infection with T. britovi induced significant expression changes in 3 protein spots at 13 d.p.i. and in 6 protein spots at 60 d.p.i. in comparison with the control group. Paired analyses between the group infected with T. pseudospiralis and the uninfected control group revealed 6 differently changed spots at 13 d.p.i. and 2 differently changed spots at 60 d.p.i. Among these 27 spots, 15 were successfully identified. Depending on the Trichinella species triggering the infection and the time point of serum collection, they were IgM heavy-chain constant region, antithrombin III-precursor, immunoglobulin gamma-chain, clusterin, homeobox protein Mohawk, apolipoprotein E precursor, serum amyloid P-component precursor, Ig lambda chains, complement C3 isoform X1, and apolipoprotein A-I. Our results demonstrate that various Trichinella species and different phases of the invasion produce a distinct, characteristic proteomic pattern in the serum of experimentally infected pigs.
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Affiliation(s)
- Michał Gondek
- Department of Food Hygiene of Animal Origin, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Akademicka 12, 20-950 Lublin, Poland; (P.K.); (K.S.)
- Correspondence: ; Tel.: +48-(81)-445-6256
| | - Agnieszka Herosimczyk
- Department of Physiology, Cytobiology and Proteomics, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology, Klemensa Janickiego 29, 71-270 Szczecin, Poland; (A.H.); (M.O.); (A.L.)
| | - Przemysław Knysz
- Department of Food Hygiene of Animal Origin, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Akademicka 12, 20-950 Lublin, Poland; (P.K.); (K.S.)
| | - Małgorzata Ożgo
- Department of Physiology, Cytobiology and Proteomics, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology, Klemensa Janickiego 29, 71-270 Szczecin, Poland; (A.H.); (M.O.); (A.L.)
| | - Adam Lepczyński
- Department of Physiology, Cytobiology and Proteomics, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology, Klemensa Janickiego 29, 71-270 Szczecin, Poland; (A.H.); (M.O.); (A.L.)
| | - Krzysztof Szkucik
- Department of Food Hygiene of Animal Origin, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Akademicka 12, 20-950 Lublin, Poland; (P.K.); (K.S.)
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22
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Deng B, Luo Q, Halim A, Liu Q, Zhang B, Song G. The Antiangiogenesis Role of Histone Deacetylase Inhibitors: Their Potential Application to Tumor Therapy and Tissue Repair. DNA Cell Biol 2019; 39:167-176. [PMID: 31808715 DOI: 10.1089/dna.2019.4877] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Angiogenesis, a process of new blood vessel formation from existing blood vessels, plays an important role in tumor growth and the tissue repair process. It is generally acknowledged that angiogenesis might contribute two both processes. In tumor growth, angiogenesis often increases oncogenic signaling, and in tissue repair, it decreases the stiffness of wound tissue and potentially exacerbates scar formation, resulting in pain and poor function. These poor outcomes are due to an increase in the expression of important genes involved in angiogenesis, such as hypoxia-inducible factor-1 alpha (HIF-1α) and its transcriptional target vascular endothelial growth factor (VEGF). Therefore, this adverse effect of angiogenesis should be taken into consideration. Limiting vessel growth instead of boosting growth may be beneficial for favorable long-term healing outcomes. Posttranslational modifications, including acetylation, which is mediated by histone acetyltransferases, and deacetylation, which is mediated by histone deacetylases (HDACs), are critical to HIF-1α function. Most studies have indicated that HDAC inhibitors (HDACIs) show great promise as antiangiogenic agents in the early phase of clinical trials. In this review, we discuss the role of the HDACs HIF-1α and VEGF in angiogenesis. Furthermore, we also discuss the molecular and cellular underpinnings of the effects of HDACIs on antiangiogenesis, which creates new avenues for anticancer therapeutics and the repair of wounded tissue.
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Affiliation(s)
- Bin Deng
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
| | - Qing Luo
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
| | - Alexander Halim
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
| | - Qiuping Liu
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
| | - Bingyu Zhang
- Chongqing Engineering Research Center of Medical Electronics and Information Technology, College of Bioinformatics, Chongqing University of Posts and Telecommunications, Chongqing, China
| | - Guanbin Song
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
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23
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Conrad S, Weber K, Walliser U, Geburek F, Skutella T. Stem Cell Therapy for Tendon Regeneration: Current Status and Future Directions. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1084:61-93. [PMID: 30043235 DOI: 10.1007/5584_2018_194] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
In adults the healing tendon generates fibrovascular scar tissue and recovers never histologically, mechanically, and functionally which leads to chronic and to degenerative diseases. In this review, the processes and mechanisms of tendon development and fetal regeneration in comparison to adult defect repair and degeneration are discussed in relation to regenerative therapeutic options. We focused on the application of stem cells, growth factors, transcription factors, and gene therapy in tendon injury therapies in order to intervene the scarring process and to induce functional regeneration of the lesioned tissue. Outlines for future therapeutic approaches for tendon injuries will be provided.
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Affiliation(s)
| | - Kathrin Weber
- Tierärztliches Zentrum für Pferde in Kirchheim Altano GmbH, Kirchheim unter Teck, Germany
| | - Ulrich Walliser
- Tierärztliches Zentrum für Pferde in Kirchheim Altano GmbH, Kirchheim unter Teck, Germany
| | - Florian Geburek
- Justus-Liebig-University Giessen, Faculty of Veterinary Medicine, Clinic for Horses - Department of Surgery, Giessen, Germany
| | - Thomas Skutella
- Institute for Anatomy and Cell Biology, Medical Faculty, University of Heidelberg, Heidelberg, Germany.
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24
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Li Y, Wu B, Qiu Z, Liang D, Liu H, Zhong M, Xu J, Chen K, Feng W, Li H, Peng L, Ouyang K, Zhu W, Lu W, Wang D. [A correlation study between the Mohawk expression level and the collagen fiber diameter of hamstring tendon graft after anterior cruciate ligament reconstruction]. ZHONGGUO XIU FU CHONG JIAN WAI KE ZA ZHI = ZHONGGUO XIUFU CHONGJIAN WAIKE ZAZHI = CHINESE JOURNAL OF REPARATIVE AND RECONSTRUCTIVE SURGERY 2019; 33:1095-1101. [PMID: 31512449 PMCID: PMC8355854 DOI: 10.7507/1002-1892.201902040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 07/26/2019] [Indexed: 11/03/2022]
Abstract
OBJECTIVE To evaluate the correlation between the Mohawk (MKX) expression level and the collagen fiber diameter of autologous hamstring tendon graft during the stable graft remodeling phase after anterior cruciate ligament (ACL) reconstruction. METHODS Between January 2018 and August 2018, patients who underwent arth-roscopic single-bundle anatomical ACL reconstruction with autologous hamstring tendons for at least 48 months and also underwent second-look arthroscopy were enrolled in study. During the second-look arthroscopic procedures, ACL graft biopsies were performed from the surface of central part of the ligament. MKX expressions of ACL grafts were analysed by real-time fluorescent quantitative PCR (qRT-PCR). The ultrastructure of collagen fibers of grafts were evaluated by transmission electron microscopy, which included average diameter of collagen fibers (D c), average diameter of large-diameter collagen fibers (D L), average diameter of small-diameter collagen fibers (D S), and large-small collagen fibers ratio (R L/S). The correlation between MKX expression level and graft collagen fiber diameter was calculated. RESULTS Twenty-six patients met the selection criteria and their ACL graft specimens were enrolled in the study. The interval between ACL reconstruction and second-look arthroscopy was 52-128 months, with an average of 78.6 months. Arthroscopic graft remodeling score was 3-6 (mean, 4.8). There were 17 cases of excellent remodeling and 9 cases of fair remodeling. All ACL grafts showed typical bimodal distributions of both large-diameter collagen fibers and small-diameter collagen fibers, but the ultrastructural characteristics of the graft collagen fibers were different according to different remodeling status under arthroscopy. The D C, D L, D S, and R L/S of the graft specimens were (65.2±9.3) nm, (91.6±10.5) nm, (45.7±8.6) nm, and 0.73±0.12, respectively. The relative expression level of MKX was 1.42±0.11, which was positively linearly correlated with D C, D L, and R L/S, and the correlation coefficient was statistically significant ( r=0.809, P=0.000; r=0.861, P=0.000; r=0.942, P=0.000), while there was no significant correlation between D S and relative expression level of MKX ( r=0.147, P=0.238). Regression analysis showed that the relative expression level of MKX could predict the D C, D L, and R L/S results of the ACL graft specimens ( P<0.05). CONCLUSION After autologous hamstring tendon grafts stepped into stabilized remodeling phase, MKX expression level could predict the diameter measurement results of collagen fibers and be used as an important evaluation basis for graft collagen anabolic metabolism.
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Affiliation(s)
- Ying Li
- Department of Sports Medicine, the First Affiliated Hospital of Shenzhen University (Shenzhen Second People's Hospital), Shenzhen Guangdong, 518000, P.R.China;Sports Medicine Engineering Technology Research Center of Guangdong Province, Shenzhen Guangdong, 518000, P.R.China
| | - Bing Wu
- Department of Sports Medicine, the First Affiliated Hospital of Shenzhen University (Shenzhen Second People's Hospital), Shenzhen Guangdong, 518000, P.R.China;Sports Medicine Engineering Technology Research Center of Guangdong Province, Shenzhen Guangdong, 518000, P.R.China
| | - Zhihe Qiu
- Department of Sports Medicine, the First Affiliated Hospital of Shenzhen University (Shenzhen Second People's Hospital), Shenzhen Guangdong, 518000, P.R.China
| | - Daqiang Liang
- Department of Sports Medicine, the First Affiliated Hospital of Shenzhen University (Shenzhen Second People's Hospital), Shenzhen Guangdong, 518000, P.R.China;Sports Medicine Engineering Technology Research Center of Guangdong Province, Shenzhen Guangdong, 518000, P.R.China
| | - Haifeng Liu
- Department of Sports Medicine, the First Affiliated Hospital of Shenzhen University (Shenzhen Second People's Hospital), Shenzhen Guangdong, 518000, P.R.China;Sports Medicine Engineering Technology Research Center of Guangdong Province, Shenzhen Guangdong, 518000, P.R.China
| | - Mingjin Zhong
- Department of Sports Medicine, the First Affiliated Hospital of Shenzhen University (Shenzhen Second People's Hospital), Shenzhen Guangdong, 518000, P.R.China;Sports Medicine Engineering Technology Research Center of Guangdong Province, Shenzhen Guangdong, 518000, P.R.China
| | - Jian Xu
- Department of Sports Medicine, the First Affiliated Hospital of Shenzhen University (Shenzhen Second People's Hospital), Shenzhen Guangdong, 518000, P.R.China;Sports Medicine Engineering Technology Research Center of Guangdong Province, Shenzhen Guangdong, 518000, P.R.China
| | - Kang Chen
- Department of Sports Medicine, the First Affiliated Hospital of Shenzhen University (Shenzhen Second People's Hospital), Shenzhen Guangdong, 518000, P.R.China;Sports Medicine Engineering Technology Research Center of Guangdong Province, Shenzhen Guangdong, 518000, P.R.China
| | - Wenzhe Feng
- Department of Sports Medicine, the First Affiliated Hospital of Shenzhen University (Shenzhen Second People's Hospital), Shenzhen Guangdong, 518000, P.R.China;Sports Medicine Engineering Technology Research Center of Guangdong Province, Shenzhen Guangdong, 518000, P.R.China
| | - Hao Li
- Department of Sports Medicine, the First Affiliated Hospital of Shenzhen University (Shenzhen Second People's Hospital), Shenzhen Guangdong, 518000, P.R.China;Sports Medicine Engineering Technology Research Center of Guangdong Province, Shenzhen Guangdong, 518000, P.R.China
| | - Liangquan Peng
- Department of Sports Medicine, the First Affiliated Hospital of Shenzhen University (Shenzhen Second People's Hospital), Shenzhen Guangdong, 518000, P.R.China;Sports Medicine Engineering Technology Research Center of Guangdong Province, Shenzhen Guangdong, 518000, P.R.China
| | - Kan Ouyang
- Department of Sports Medicine, the First Affiliated Hospital of Shenzhen University (Shenzhen Second People's Hospital), Shenzhen Guangdong, 518000, P.R.China;Sports Medicine Engineering Technology Research Center of Guangdong Province, Shenzhen Guangdong, 518000, P.R.China
| | - Weimin Zhu
- Department of Sports Medicine, the First Affiliated Hospital of Shenzhen University (Shenzhen Second People's Hospital), Shenzhen Guangdong, 518000, P.R.China;Sports Medicine Engineering Technology Research Center of Guangdong Province, Shenzhen Guangdong, 518000, P.R.China
| | - Wei Lu
- Department of Sports Medicine, the First Affiliated Hospital of Shenzhen University (Shenzhen Second People's Hospital), Shenzhen Guangdong, 518000, P.R.China;Sports Medicine Engineering Technology Research Center of Guangdong Province, Shenzhen Guangdong, 518000,
| | - Daping Wang
- Department of Sports Medicine, the First Affiliated Hospital of Shenzhen University (Shenzhen Second People's Hospital), Shenzhen Guangdong, 518000, P.R.China;Sports Medicine Engineering Technology Research Center of Guangdong Province, Shenzhen Guangdong, 518000,
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25
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Zhou L, Zhao W, Fu Y, Fang X, Ren S, Ren J. Genome-wide detection of genetic loci and candidate genes for teat number and body conformation traits at birth in Chinese Sushan pigs. Anim Genet 2019; 50:753-756. [PMID: 31475745 DOI: 10.1111/age.12844] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/23/2019] [Indexed: 12/20/2022]
Abstract
Body conformation at birth and teat number are economically important traits in the pig industry, as these traits are usually explored to evaluate the growth and reproductive potential of piglets. To detect genetic loci and candidate genes for these traits, we performed a GWAS on 269 pigs from a recently developed Chinese breed (Sushan) using 38 128 informative SNPs on the Affymetrix Porcine SNP 55K Array. In total, we detected one genome-wide significant (P = 1.31e-6) SNP for teat number on chromosome X and 15 chromosome-wide significant SNPs for teat number, body weight, body length, chest circumference and cannon circumference at birth on chromosomes 1, 3, 4, 6, 7, 9, 10, 13, 14, 15, 17 and 18. The most significant SNP had an additive effect of 0.74 × total teat number, explaining 20% of phenotypic variance. Five significant SNPs resided in the previously reported quantitative trait loci for these traits and seven significant SNPs had a pleiotropic effect on multiple traits. Intriguingly, 12 of the genes nearest to the significant SNPs are functionally related to body conformation and teat number traits, including SPRED2, MKX, TMSB4X and ESR1. GO analysis revealed that candidate genes proximal to the significant SNPs were enriched in the G-protein coupled receptor and steroid hormone-mediated signaling pathway. Our findings shed light on the genetic basis of the measured traits and provide molecular markers especially for the genetic improvement of teat number in Sushan and related pigs.
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Affiliation(s)
- L Zhou
- Institute of Animal Science/Key Laboratory of Animal Breed Improvement and Reproduction/Jiangsu Germplasm Resources Protection and Utilization Platform, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China
| | - W Zhao
- Institute of Animal Science/Key Laboratory of Animal Breed Improvement and Reproduction/Jiangsu Germplasm Resources Protection and Utilization Platform, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China
| | - Y Fu
- Institute of Animal Science/Key Laboratory of Animal Breed Improvement and Reproduction/Jiangsu Germplasm Resources Protection and Utilization Platform, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China
| | - X Fang
- Institute of Animal Science/Key Laboratory of Animal Breed Improvement and Reproduction/Jiangsu Germplasm Resources Protection and Utilization Platform, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China
| | - S Ren
- Institute of Animal Science/Key Laboratory of Animal Breed Improvement and Reproduction/Jiangsu Germplasm Resources Protection and Utilization Platform, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China
| | - J Ren
- College of Animal Science, South China Agricultural University, 510642, Guangzhou, China
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26
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Integrative genomic analysis predicts novel functional enhancer-SNPs for bone mineral density. Hum Genet 2019; 138:167-185. [PMID: 30656451 DOI: 10.1007/s00439-019-01971-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Accepted: 01/03/2019] [Indexed: 01/20/2023]
Abstract
Osteoporosis is a skeletal disorder characterized by low bone mineral density (BMD) and deterioration of bone microarchitecture. To identify novel genetic loci underlying osteoporosis, an effective strategy is to focus on scanning of variants with high potential functional impacts. Enhancers play a crucial role in regulating cell-type-specific transcription. Therefore, single-nucleotide polymorphisms (SNPs) located in enhancers (enhancer-SNPs) may represent strong candidate functional variants. Here, we performed a targeted analysis for potential functional enhancer-SNPs that may affect gene expression and biological processes in bone-related cells, specifically, osteoblasts, and peripheral blood monocytes (PBMs), using five independent cohorts (n = 5905) and the genetics factors for osteoporosis summary statistics, followed by comprehensive integrative genomic analyses of chromatin states, transcription, and metabolites. We identified 15 novel enhancer-SNPs associated with femoral neck and lumbar spine BMD, including 5 SNPs mapped to novel genes (e.g., rs10840343 and rs10770081 in IGF2 gene) and 10 novel SNPs mapped to known BMD-associated genes (e.g., rs2941742 in ESR1 gene, and rs10249092 and rs4342522 in SHFM1 gene). Interestingly, enhancer-SNPs rs10249092 and rs4342522 in SHFM1 were tightly linked, but annotated to different enhancers in PBMs and osteoblasts, respectively, suggesting that even tightly linked SNPs may regulate the same target gene and contribute to the phenotype variation in cell-type-specific manners. Importantly, ten enhancer-SNPs may also regulate BMD variation by affecting the serum metabolite levels. Our findings revealed novel susceptibility loci that may regulate BMD variation and provided intriguing insights into the genetic mechanisms of osteoporosis.
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27
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Nakamichi R, Kataoka K, Asahara H. Essential role of Mohawk for tenogenic tissue homeostasis including spinal disc and periodontal ligament. Mod Rheumatol 2018; 28:933-940. [PMID: 29667905 PMCID: PMC6511339 DOI: 10.1080/14397595.2018.1466644] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Accepted: 04/17/2018] [Indexed: 01/09/2023]
Abstract
Tendons and ligaments play essential roles in connecting muscle and bone and stabilizing the connections between bones. The damage to tendons and ligaments caused by aging, injury, and arthritis induces the dysfunction of the musculoskeletal system and reduces the quality of life. Current therapy for damaged tendons and ligaments depends on self-repair; however, it is difficult to reconstruct normal tissue. Regeneration therapy for tendons and ligaments has not been achieved, partly because the mechanism, cell biology, and pathophysiology of tendon and ligament development remain unclear. This review summarizes the role of the transcription factor, Mohawk, which controls tendon and ligament cell differentiation, in the maintenance of cell homeostasis, as well as its function in disease and the possibility of new therapeutic approaches.
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Affiliation(s)
- Ryo Nakamichi
- Department of Systems Biomedicine, Tokyo Medical and Dental University, Tokyo, Japan
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
- Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, California, USA
| | - Kensuke Kataoka
- Department of Systems Biomedicine, Tokyo Medical and Dental University, Tokyo, Japan
| | - Hiroshi Asahara
- Department of Systems Biomedicine, Tokyo Medical and Dental University, Tokyo, Japan
- Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, California, USA
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28
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Nguyen PK, Pan XS, Li J, Kuo CK. Roadmap of molecular, compositional, and functional markers during embryonic tendon development. Connect Tissue Res 2018; 59:495-508. [PMID: 30231651 PMCID: PMC6669275 DOI: 10.1080/03008207.2018.1511710] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Tendon is a specialized connective tissue that connects muscle to bone, thereby enabling musculoskeletal movement. Tendon injury leads to formation of tissue with aberrant functional properties. Current approaches to treat tendon injuries, including surgical repair and tissue engineering, have not achieved normal tendon. A roadmap of markers could help with identifying when mis-steps occur during aberrant tendon formation and providing instructions for normal tendon formation. We propose this roadmap should be based on the embryo-the perfect model of tissue formation. Our prior studies have shown that adult mesenchymal stem cells mimic tendon progenitor cell behavior when treated with tendon developmental cues. Although transcription factors and extracellular matrix molecules are commonly used to assess tendon development, we have shown that these markers do not reliably reflect functional property elaboration. Thus, evaluating tendon formation on the basis of a combination of these molecular, compositional, and functional markers is important. In this review, we highlight various tendon markers with focus on their temporal profiles and roles in tendon development to outline a roadmap that may be useful for informing tendon healing and tissue engineering strategies.
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Affiliation(s)
- Phong K. Nguyen
- Department of Biomedical Engineering, University of Rochester, Rochester NY, USA.,Center for Musculoskeletal Research, University of Rochester School of Medicine, Rochester NY, USA
| | - Xuan Sabrina Pan
- Department of Biomedical Engineering, University of Rochester, Rochester NY, USA.,Center for Musculoskeletal Research, University of Rochester School of Medicine, Rochester NY, USA
| | - Jiewen Li
- Department of Biomedical Engineering, University of Rochester, Rochester NY, USA.,Center for Musculoskeletal Research, University of Rochester School of Medicine, Rochester NY, USA
| | - Catherine K. Kuo
- Department of Biomedical Engineering, University of Rochester, Rochester NY, USA.,Center for Musculoskeletal Research, University of Rochester School of Medicine, Rochester NY, USA.,Department of Orthopaedics, University of Rochester School of Medicine, Rochester NY, USA.,Genetics, Development, and Stem Cells Program, University of Rochester School of Medicine, Rochester NY, USA.,Materials Science Graduate Program, University of Rochester, Rochester NY, USA
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29
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Nassari S, Duprez D, Fournier-Thibault C. Non-myogenic Contribution to Muscle Development and Homeostasis: The Role of Connective Tissues. Front Cell Dev Biol 2017; 5:22. [PMID: 28386539 PMCID: PMC5362625 DOI: 10.3389/fcell.2017.00022] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 03/07/2017] [Indexed: 12/22/2022] Open
Abstract
Skeletal muscles belong to the musculoskeletal system, which is composed of bone, tendon, ligament and irregular connective tissue, and closely associated with motor nerves and blood vessels. The intrinsic molecular signals regulating myogenesis have been extensively investigated. However, muscle development, homeostasis and regeneration require interactions with surrounding tissues and the cellular and molecular aspects of this dialogue have not been completely elucidated. During development and adult life, myogenic cells are closely associated with the different types of connective tissue. Connective tissues are defined as specialized (bone and cartilage), dense regular (tendon and ligament) and dense irregular connective tissue. The role of connective tissue in muscle morphogenesis has been investigated, thanks to the identification of transcription factors that characterize the different types of connective tissues. Here, we review the development of the various connective tissues in the context of the musculoskeletal system and highlight their important role in delivering information necessary for correct muscle morphogenesis, from the early step of myoblast differentiation to the late stage of muscle maturation. Interactions between muscle and connective tissue are also critical in the adult during muscle regeneration, as impairment of the regenerative potential after injury or in neuromuscular diseases results in the progressive replacement of the muscle mass by fibrotic tissue. We conclude that bi-directional communication between muscle and connective tissue is critical for a correct assembly of the musculoskeletal system during development as well as to maintain its homeostasis in the adult.
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Affiliation(s)
- Sonya Nassari
- Developmental Biology Laboratory, IBPS, Centre National de la Recherche Scientifique UMR7622, Institut National de la Santé Et de la Recherche Médicale U1156, Université Pierre et Marie Curie, Sorbonne Universités Paris, France
| | - Delphine Duprez
- Developmental Biology Laboratory, IBPS, Centre National de la Recherche Scientifique UMR7622, Institut National de la Santé Et de la Recherche Médicale U1156, Université Pierre et Marie Curie, Sorbonne Universités Paris, France
| | - Claire Fournier-Thibault
- Developmental Biology Laboratory, IBPS, Centre National de la Recherche Scientifique UMR7622, Institut National de la Santé Et de la Recherche Médicale U1156, Université Pierre et Marie Curie, Sorbonne Universités Paris, France
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30
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Koda N, Sato T, Shinohara M, Ichinose S, Ito Y, Nakamichi R, Kayama T, Kataoka K, Suzuki H, Moriyama K, Asahara H. The transcription factor mohawk homeobox regulates homeostasis of the periodontal ligament. Development 2017; 144:313-320. [PMID: 27993989 PMCID: PMC5394762 DOI: 10.1242/dev.135798] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Accepted: 11/28/2016] [Indexed: 12/23/2022]
Abstract
The periodontal ligament (PDL), which connects the teeth to the alveolar bone, is essential for periodontal tissue homeostasis. Although the significance of the PDL is recognized, molecular mechanisms underlying PDL function are not well known. We report that mohawk homeobox (Mkx), a tendon-specific transcription factor, regulates PDL homeostasis by preventing its degeneration. Mkx is expressed in the mouse PDL at the age of 10 weeks and expression remained at similar levels at 12 months. In Mkx-/- mice, age-dependent expansion of the PDL at the maxillary first molar (M1) furcation area was observed. Transmission electron microscopy (TEM) revealed that Mkx-/- mice presented collagen fibril degeneration in PDL with age, while the collagen fibril diameter gradually increased in Mkx+/+ mice. PDL cells lost their shape in Mkx-/- mice, suggesting changes in PDL properties. Microarray and quantitative polymerase chain reaction (qPCR) analyses of Mkx-/- PDL revealed an increase in osteogenic gene expression and no change in PDL- and inflammatory-related gene expression. Additionally, COL1A1 and COL1A2 were upregulated in Mkx-overexpressing human PDL fibroblasts, whereas osteogenic genes were downregulated. Our results indicate that Mkx prevents PDL degeneration by regulating osteogenesis.
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Affiliation(s)
- Naoki Koda
- Department of Systems BioMedicine, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
- Maxillofacial Orthognathics, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Tempei Sato
- Department of Systems BioMedicine, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Masahiro Shinohara
- Department of Systems BioMedicine, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
- JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Shizuko Ichinose
- Research Center for Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Yoshiaki Ito
- Department of Systems BioMedicine, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Ryo Nakamichi
- Department of Systems BioMedicine, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Tomohiro Kayama
- Department of Systems BioMedicine, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Kensuke Kataoka
- Department of Systems BioMedicine, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Hidetsugu Suzuki
- Department of Systems BioMedicine, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Keiji Moriyama
- Maxillofacial Orthognathics, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Hiroshi Asahara
- Department of Systems BioMedicine, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
- Department of Molecular and Experimental Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, MEM-161, La Jolla, CA 92037, USA
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31
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Transcription of the non-coding RNA upperhand controls Hand2 expression and heart development. Nature 2016; 539:433-436. [PMID: 27783597 DOI: 10.1038/nature20128] [Citation(s) in RCA: 259] [Impact Index Per Article: 32.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Accepted: 09/29/2016] [Indexed: 12/28/2022]
Abstract
HAND2 is an ancestral regulator of heart development and one of four transcription factors that control the reprogramming of fibroblasts into cardiomyocytes. Deletion of Hand2 in mice results in right ventricle hypoplasia and embryonic lethality. Hand2 expression is tightly regulated by upstream enhancers that reside within a super-enhancer delineated by histone H3 acetyl Lys27 (H3K27ac) modifications. Here we show that transcription of a Hand2-associated long non-coding RNA, which we named upperhand (Uph), is required to maintain the super-enhancer signature and elongation of RNA polymerase II through the Hand2 enhancer locus. Blockade of Uph transcription, but not knockdown of the mature transcript, abolished Hand2 expression, causing right ventricular hypoplasia and embryonic lethality in mice. Given the substantial number of uncharacterized promoter-associated long non-coding RNAs encoded by the mammalian genome, the Uph-Hand2 regulatory partnership offers a mechanism by which divergent non-coding transcription can establish a permissive chromatin environment.
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32
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Havis E, Bonnin MA, Esteves de Lima J, Charvet B, Milet C, Duprez D. TGFβ and FGF promote tendon progenitor fate and act downstream of muscle contraction to regulate tendon differentiation during chick limb development. Development 2016; 143:3839-3851. [PMID: 27624906 DOI: 10.1242/dev.136242] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Accepted: 08/25/2016] [Indexed: 01/02/2023]
Abstract
The molecular programme underlying tendon development has not been fully identified. Interactions with components of the musculoskeletal system are important for limb tendon formation. Limb tendons initiate their development independently of muscles; however, muscles are required for further tendon differentiation. We show that both FGF/ERK MAPK and TGFβ/SMAD2/3 signalling pathways are required and sufficient for SCX expression in chick undifferentiated limb cells, whereas the FGF/ERK MAPK pathway inhibits Scx expression in mouse undifferentiated limb mesodermal cells. During differentiation, muscle contraction is required to maintain SCX, TNMD and THBS2 expression in chick limbs. The activities of FGF/ERK MAPK and TGFβ/SMAD2/3 signalling pathways are decreased in tendons under immobilisation conditions. Application of FGF4 or TGFβ2 ligands prevents SCX downregulation in immobilised limbs. TGFβ2 but not FGF4 prevent TNMD and THBS2 downregulation under immobilisation conditions. We did not identify any intracellular crosstalk between both signalling pathways in their positive effect on SCX expression. Independently of each other, both FGF and TGFβ promote tendon commitment of limb mesodermal cells and act downstream of mechanical forces to regulate tendon differentiation during chick limb development.
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Affiliation(s)
- Emmanuelle Havis
- Sorbonne Universités, UPMC Univ Paris 06, CNRS UMR 7622, Inserm U1156, IBPS-Developmental Biology Laboratory, Paris F-75005, France
| | - Marie-Ange Bonnin
- Sorbonne Universités, UPMC Univ Paris 06, CNRS UMR 7622, Inserm U1156, IBPS-Developmental Biology Laboratory, Paris F-75005, France
| | - Joana Esteves de Lima
- Sorbonne Universités, UPMC Univ Paris 06, CNRS UMR 7622, Inserm U1156, IBPS-Developmental Biology Laboratory, Paris F-75005, France
| | - Benjamin Charvet
- Sorbonne Universités, UPMC Univ Paris 06, CNRS UMR 7622, Inserm U1156, IBPS-Developmental Biology Laboratory, Paris F-75005, France
| | - Cécile Milet
- Sorbonne Universités, UPMC Univ Paris 06, CNRS UMR 7622, Inserm U1156, IBPS-Developmental Biology Laboratory, Paris F-75005, France
| | - Delphine Duprez
- Sorbonne Universités, UPMC Univ Paris 06, CNRS UMR 7622, Inserm U1156, IBPS-Developmental Biology Laboratory, Paris F-75005, France
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33
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Islam A, Younesi M, Mbimba T, Akkus O. Collagen Substrate Stiffness Anisotropy Affects Cellular Elongation, Nuclear Shape, and Stem Cell Fate toward Anisotropic Tissue Lineage. Adv Healthc Mater 2016; 5:2237-47. [PMID: 27377355 PMCID: PMC5203936 DOI: 10.1002/adhm.201600284] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 06/03/2016] [Indexed: 01/01/2023]
Abstract
Rigidity of substrates plays an important role in stem cell fate. Studies are commonly carried out on isotropically stiff substrate or substrates with unidirectional stiffness gradients. However, many native tissues are anisotropically stiff and it is unknown whether controlled presentation of stiff and compliant material axes on the same substrate governs cytoskeletal and nuclear morphology, as well as stem cell differentiation. In this study, electrocompacted collagen sheets are stretched to varying degrees to tune the stiffness anisotropy (SA) in the range of 1 to 8, resulting in stiff and compliant material axes orthogonal to each other. The cytoskeletal aspect ratio increased with increasing SA by about fourfold. Such elongation was absent on cellulose acetate replicas of aligned collagen surfaces indicating that the elongation was not driven by surface topography. Mesenchymal stem cells (MSCs) seeded on varying anisotropy sheets displayed a dose-dependent upregulation of tendon-related markers such as Mohawk and Scleraxis. After 21 d of culture, highly anisotropic sheets induced greater levels of production of type-I, type-III collagen, and thrombospondin-4. Therefore, SA has direct effects on MSC differentiation. These findings may also have ramifications of stem cell fate on other anisotropically stiff tissues, such as skeletal/cardiac muscles, ligaments, and bone.
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Affiliation(s)
- Anowarul Islam
- Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Mousa Younesi
- Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Thomas Mbimba
- Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Ozan Akkus
- Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA.
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA.
- Department of Orthopaedics, Case Western Reserve University School of Medicine, Cleveland, OH, 44106, USA.
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34
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Mohawk promotes the maintenance and regeneration of the outer annulus fibrosus of intervertebral discs. Nat Commun 2016; 7:12503. [PMID: 27527664 PMCID: PMC4990710 DOI: 10.1038/ncomms12503] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Accepted: 07/07/2016] [Indexed: 01/07/2023] Open
Abstract
The main pathogenesis of intervertebral disc (IVD) herniation involves disruption of the annulus fibrosus (AF) caused by ageing or excessive mechanical stress and the resulting prolapse of the nucleus pulposus. Owing to the avascular nature of the IVD and lack of understanding the mechanisms that maintain the IVD, current therapies do not lead to tissue regeneration. Here we show that homeobox protein Mohawk (Mkx) is a key transcription factor that regulates AF development, maintenance and regeneration. Mkx is mainly expressed in the outer AF (OAF) of humans and mice. In Mkx−/− mice, the OAF displays a deficiency of multiple tendon/ligament-related genes, a smaller OAF collagen fibril diameter and a more rapid progression of IVD degeneration compared with the wild type. Mesenchymal stem cells overexpressing Mkx promote functional AF regeneration in a mouse AF defect model, with abundant collagen fibril formation. Our results indicate a therapeutic strategy for AF regeneration. Homeobox protein Mohwak (Mkx) is involved in tendon and ligament development. Here the authors show that Mkx in the outer annulus fibrosus of the intervertebral disc plays a role in maintenance of the IVD, showing that stem cells overexpressing Mkx enhance therapeutic IVD regeneration in mice.
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35
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Gene targeting of the transcription factor Mohawk in rats causes heterotopic ossification of Achilles tendon via failed tenogenesis. Proc Natl Acad Sci U S A 2016; 113:7840-5. [PMID: 27370800 DOI: 10.1073/pnas.1522054113] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Cell-based or pharmacological approaches for promoting tendon repair are currently not available because the molecular mechanisms of tendon development and healing are not well understood. Although analysis of knockout mice provides many critical insights, small animals such as mice have some limitations. In particular, precise physiological examination for mechanical load and the ability to obtain a sufficient number of primary tendon cells for molecular biology studies are challenging using mice. Here, we generated Mohawk (Mkx)(-/-) rats by using CRISPR/Cas9, which showed not only systemic hypoplasia of tendons similar to Mkx(-/-) mice, but also earlier heterotopic ossification of the Achilles tendon compared with Mkx(-/-) mice. Analysis of tendon-derived cells (TDCs) revealed that Mkx deficiency accelerated chondrogenic and osteogenic differentiation, whereas Mkx overexpression suppressed chondrogenic, osteogenic, and adipogenic differentiation. Furthermore, mechanical stretch stimulation of Mkx(-/-) TDCs led to chondrogenic differentiation, whereas the same stimulation in Mkx(+/+) TDCs led to formation of tenocytes. ChIP-seq of Mkx overexpressing TDCs revealed significant peaks in tenogenic-related genes, such as collagen type (Col)1a1 and Col3a1, and chondrogenic differentiation-related genes, such as SRY-box (Sox)5, Sox6, and Sox9 Our results demonstrate that Mkx has a dual role, including accelerating tendon differentiation and preventing chondrogenic/osteogenic differentiation. This molecular network of Mkx provides a basis for tendon physiology and tissue engineering.
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36
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Subramanian A, Schilling TF. Tendon development and musculoskeletal assembly: emerging roles for the extracellular matrix. Development 2016; 142:4191-204. [PMID: 26672092 DOI: 10.1242/dev.114777] [Citation(s) in RCA: 102] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Tendons and ligaments are extracellular matrix (ECM)-rich structures that interconnect muscles and bones. Recent work has shown how tendon fibroblasts (tenocytes) interact with muscles via the ECM to establish connectivity and strengthen attachments under tension. Similarly, ECM-dependent interactions between tenocytes and cartilage/bone ensure that tendon-bone attachments form with the appropriate strength for the force required. Recent studies have also established a close lineal relationship between tenocytes and skeletal progenitors, highlighting the fact that defects in signals modulated by the ECM can alter the balance between these fates, as occurs in calcifying tendinopathies associated with aging. The dynamic fine-tuning of tendon ECM composition and assembly thus gives rise to the remarkable characteristics of this unique tissue type. Here, we provide an overview of the functions of the ECM in tendon formation and maturation that attempts to integrate findings from developmental genetics with those of matrix biology.
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Affiliation(s)
- Arul Subramanian
- Department of Developmental and Cell Biology, University of California, Irvine, Irvine, CA 92697-2300, USA
| | - Thomas F Schilling
- Department of Developmental and Cell Biology, University of California, Irvine, Irvine, CA 92697-2300, USA
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37
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Hutchins ED, Eckalbar WL, Wolter JM, Mangone M, Kusumi K. Differential expression of conserved and novel microRNAs during tail regeneration in the lizard Anolis carolinensis. BMC Genomics 2016; 17:339. [PMID: 27150582 PMCID: PMC4858913 DOI: 10.1186/s12864-016-2640-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Accepted: 04/22/2016] [Indexed: 12/25/2022] Open
Abstract
Background Lizards are evolutionarily the most closely related vertebrates to humans that can lose and regrow an entire appendage. Regeneration in lizards involves differential expression of hundreds of genes that regulate wound healing, musculoskeletal development, hormonal response, and embryonic morphogenesis. While microRNAs are able to regulate large groups of genes, their role in lizard regeneration has not been investigated. Results MicroRNA sequencing of green anole lizard (Anolis carolinensis) regenerating tail and associated tissues revealed 350 putative novel and 196 known microRNA precursors. Eleven microRNAs were differentially expressed between the regenerating tail tip and base during maximum outgrowth (25 days post autotomy), including miR-133a, miR-133b, and miR-206, which have been reported to regulate regeneration and stem cell proliferation in other model systems. Three putative novel differentially expressed microRNAs were identified in the regenerating tail tip. Conclusions Differentially expressed microRNAs were identified in the regenerating lizard tail, including known regulators of stem cell proliferation. The identification of 3 putative novel microRNAs suggests that regulatory networks, either conserved in vertebrates and previously uncharacterized or specific to lizards, are involved in regeneration. These findings suggest that differential regulation of microRNAs may play a role in coordinating the timing and expression of hundreds of genes involved in regeneration. Electronic supplementary material The online version of this article (doi:10.1186/s12864-016-2640-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Elizabeth D Hutchins
- School of Life Sciences, Arizona State University, Tempe, AZ, 85287, USA.,Neurogenomics Division, Translational Genomics Research Institute, Phoenix, AZ, 85004, USA
| | - Walter L Eckalbar
- School of Life Sciences, Arizona State University, Tempe, AZ, 85287, USA.,Department of Bioengineering and Therapeutic Sciences, Institute for Human Genetics, University of California San Francisco, San Francisco, CA, 94143, USA
| | - Justin M Wolter
- School of Life Sciences, Arizona State University, Tempe, AZ, 85287, USA.,Virginia G. Piper Center for Personalized Diagnostics, The Biodesign Institute at Arizona State University, Tempe, AZ, 85287, USA
| | - Marco Mangone
- School of Life Sciences, Arizona State University, Tempe, AZ, 85287, USA.,Virginia G. Piper Center for Personalized Diagnostics, The Biodesign Institute at Arizona State University, Tempe, AZ, 85287, USA
| | - Kenro Kusumi
- School of Life Sciences, Arizona State University, Tempe, AZ, 85287, USA. .,Neurogenomics Division, Translational Genomics Research Institute, Phoenix, AZ, 85004, USA.
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38
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Abdelhedi F, El Khattabi L, Essid N, Viot G, Letessier D, Lebbar A, Dupont JM. A de novo 10p11.23-p12.1 deletion recapitulates the phenotype observed in WAC mutations and strengthens the role of WAC in intellectual disability and behavior disorders. Am J Med Genet A 2016; 170:1912-7. [PMID: 27119754 DOI: 10.1002/ajmg.a.37686] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Accepted: 04/11/2016] [Indexed: 12/19/2022]
Abstract
Chromosomal microarray analysis has become a powerful diagnostic tool in the investigation of patients with intellectual disability leading to the discovery of dosage sensitive genes implicated in the manifestation of various genomic disorders. Interstitial deletions of the short arm of chromosome 10 represent rare genetic abnormalities, especially those encompassing the chromosomal region 10p11-p12. To date, only 10 postnatal cases with microdeletion of this region have been described, and all patients shared a common phenotype, including intellectual disability, abnormal behavior, distinct dysmorphic features, visual impairment, and cardiac malformations. WAC was suggested to be the main candidate gene for intellectual disability associated with 10 p11-p12 deletion syndrome. Here, we describe a new case of de novo 10p11.23-p12.1 microdeletion in a patient with intellectual disability, abnormal behavior, and distinct dysmorphic features. Our observation allows us to redefine the smallest region of overlap among patients reported so far, with a size of 80 Kb and which contains only the WAC gene. These findings strengthen the hypothesis that haploinsufficency of WAC gene might be likely responsible for intellectual disability and behavior disorders. Our data also led us to propose a clinical pathway for patients with this recognizable genetic syndrome depending on the facial dysmorphisms. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Fatma Abdelhedi
- Cytogenetics Laboratory, APHP, Cochin Hospital, Paris, France
| | - Laila El Khattabi
- Cytogenetics Laboratory, APHP, Cochin Hospital, Paris, France.,Paris Descartes University, Faculty of Medicine, Paris, France
| | - Nouha Essid
- Paediatric Neurology Unit, Department of Paediatric, Raymond Poincare Hospital, APHP, University of Versailles-St-Quentin, Versailles-St-Quentin, France
| | - Geraldine Viot
- Paris Descartes University, Faculty of Medicine, Paris, France.,Department of Gynecology-Obstetrics APHP, Cochin Hospital, Paris, France
| | | | - Aziza Lebbar
- Cytogenetics Laboratory, APHP, Cochin Hospital, Paris, France.,Paris Descartes University, Faculty of Medicine, Paris, France
| | - Jean-Michel Dupont
- Cytogenetics Laboratory, APHP, Cochin Hospital, Paris, France.,Paris Descartes University, Faculty of Medicine, Paris, France
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39
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Gaut L, Duprez D. Tendon development and diseases. WILEY INTERDISCIPLINARY REVIEWS-DEVELOPMENTAL BIOLOGY 2015; 5:5-23. [PMID: 26256998 DOI: 10.1002/wdev.201] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Revised: 06/15/2015] [Accepted: 06/20/2015] [Indexed: 12/22/2022]
Abstract
Tendon is a uniaxial connective tissue component of the musculoskeletal system. Tendon is involved in force transmission between muscle and bone. Tendon injury is very common and debilitating but tendon repair remains a clinical challenge for orthopedic medicine. In vertebrates, tendon is mainly composed of type I collagen fibrils, displaying a parallel organization along the tendon axis. The tendon-specific spatial organization of type I collagen provides the mechanical properties for tendon function. In contrast to other components of the musculoskeletal system, tendon biology is poorly understood. An important goal in tendon biology is to understand the mechanisms involved in the production and assembly of type I collagen fibrils during development, postnatal formation, and healing processes in order to design new therapies for tendon repair. In this review we highlight the current understanding of the molecular and mechanical signals known to be involved in tenogenesis during development, and how development provides insights into tendon healing processes. WIREs Dev Biol 2016, 5:5-23. doi: 10.1002/wdev.201 For further resources related to this article, please visit the WIREs website.
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Affiliation(s)
- Ludovic Gaut
- CNRS UMR 7622, IBPS-Developmental Biology Laboratory, Paris, France.,Sorbonne Universités, UPMC Univ Paris 06, IBPS-Developmental Biology Laboratory, Paris, France.,Inserm U1156, Paris, France
| | - Delphine Duprez
- CNRS UMR 7622, IBPS-Developmental Biology Laboratory, Paris, France.,Sorbonne Universités, UPMC Univ Paris 06, IBPS-Developmental Biology Laboratory, Paris, France.,Inserm U1156, Paris, France
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40
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Dyment NA, Galloway JL. Regenerative biology of tendon: mechanisms for renewal and repair. ACTA ACUST UNITED AC 2015; 1:124-131. [PMID: 26389023 DOI: 10.1007/s40610-015-0021-3] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Understanding the molecular and cellular mechanisms underlying tissue turnover and repair are essential towards addressing pathologies in aging, injury and disease. Each tissue has distinct means of maintaining homeostasis and healing after injury. For some, resident stem cell populations mediate both of these processes. These stem cells, by definition, are self renewing and give rise to all the differentiated cells of that tissue. However, not all organs fit with this traditional stem cell model of regeneration, and some do not appear to harbor somatic stem or progenitor cells capable of multilineage in vivo reconstitution. Despite recent progress in tendon progenitor cell research, our current knowledge of the mechanisms regulating tendon cell homeostasis and injury response is limited. Understanding the role of resident tendon cell populations is of great importance for regenerative medicine based approaches to tendon injuries and disease. The goal of this review is to bring to light our current knowledge regarding tendon progenitor cells and their role in tissue maintenance and repair. We will focus on pressing questions in the field and the new tools, including model systems, available to address them.
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Affiliation(s)
- Nathaniel A Dyment
- Center for Regenerative Medicine and Skeletal Development, Department of Reconstructive Sciences, School of Dental Medicine, University of Connecticut Health Center
| | - Jenna L Galloway
- Center for Regenerative Medicine, Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, Harvard Stem Cell Institute
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41
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Milet C, Duprez D. The Mkx homeoprotein promotes tenogenesis in stem cells and improves tendon repair. ANNALS OF TRANSLATIONAL MEDICINE 2015; 3:S33. [PMID: 26046080 DOI: 10.3978/j.issn.2305-5839.2015.03.64] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Subscribe] [Scholar Register] [Received: 02/18/2015] [Accepted: 02/20/2015] [Indexed: 12/27/2022]
Affiliation(s)
- Cécile Milet
- 1 CNRS UMR 7622, IBPS-Developmental Biology Laboratory, F-75005, Paris, France ; 2 Sorbonne Universités, UPMC Univ Paris 06, IBPS-Developmental Biology Laboratory, F-75005, Paris, France ; 3 Inserm U1156, F-75005, Paris, France
| | - Delphine Duprez
- 1 CNRS UMR 7622, IBPS-Developmental Biology Laboratory, F-75005, Paris, France ; 2 Sorbonne Universités, UPMC Univ Paris 06, IBPS-Developmental Biology Laboratory, F-75005, Paris, France ; 3 Inserm U1156, F-75005, Paris, France
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42
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Huang AH, Lu HH, Schweitzer R. Molecular regulation of tendon cell fate during development. J Orthop Res 2015; 33:800-12. [PMID: 25664867 DOI: 10.1002/jor.22834] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Accepted: 01/16/2015] [Indexed: 02/04/2023]
Abstract
Although there have been several advances identifying novel mediators of tendon induction, differentiation, and patterning, much of the basic landscape of tendon biology from developmental stages onward remain almost completely undefined. During the New Frontiers in Tendon Research meeting, a group of developmental biologists with expertise across musculoskeletal disciplines identified key challenges for the tendon development field. The tools generated and the molecular regulators identified in developmental research have enhanced mechanistic studies in tendon injury and repair, both by defining benchmarks for success, as well as informing regenerative strategies. To address the needs of the orthopedic research community, this review will therefore focus on three key areas in tendon development that may have critical implications for the fields of tendon repair/regeneration and tendon tissue engineering, including functional markers of tendon cell identity, signaling regulators of tendon induction and differentiation, and in vitro culture models for tendon cell differentiation. Our goal is to provide a useful list of the currently known molecular players and their function in tendon differentiation within the context of development.
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Affiliation(s)
- Alice H Huang
- Department of Orthopaedics, Icahn School of Medicine at Mount Sinai, New York, NY
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43
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Mroczkowski HJ, Arnold G, Schneck FX, Rajkovic A, Yatsenko SA. Interstitial 10p11.23-p12.1 microdeletions associated with developmental delay, craniofacial abnormalities, and cryptorchidism. Am J Med Genet A 2014; 164A:2623-6. [PMID: 25073539 DOI: 10.1002/ajmg.a.36627] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2013] [Accepted: 05/02/2014] [Indexed: 12/22/2022]
Abstract
Cryptorchidism is the most common genital problem encountered in males and is associated with many chromosomal disorders; however, the genetic factors are mostly unknown. To delineate critical genes affecting testicular migration, we performed genotype-phenotype correlation in patients with deletions involving the proximal short arm of chromosome 10 (10p11-p12), a rare abnormality characterized by developmental delay, craniofacial abnormalities, and in some cases, cryptorchidism. Here we report on a male patient with developmental delay, mild craniofacial dysmorphism, bilateral cryptorchidism, and an 850-kb deletion, within the 10p11.2 region, involving three genes-MKX, ARMC4, and MPP7-as determined by array comparative genomic hybridization analysis. Comparison with four previously reported male patients with overlapping deletions revealed a 140-kb common region, containing the MKX gene, in association with cryptorchidism. The MKX gene is a member of the three amino acid loop extension (TALE) superclass of homeobox genes that is expressed in developing male gonads (male gonadal ridge and testis cords) in temporal relationship to SOX9, a critical regulator of sexual differentiation. Our results suggest that haploinsufficiency of the MKX gene may affect the developmental process during testis migration or serve as a genetic susceptibility locus for cryptorchidism. We propose that deletions of the proximal 10p represent a contiguous gene syndrome; therefore, patients may present with a complex phenotype, depending on the extent of the deletion.
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Affiliation(s)
- Henry J Mroczkowski
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
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44
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Duijvesteijn N, Veltmaat JM, Knol EF, Harlizius B. High-resolution association mapping of number of teats in pigs reveals regions controlling vertebral development. BMC Genomics 2014; 15:542. [PMID: 24981054 PMCID: PMC4092218 DOI: 10.1186/1471-2164-15-542] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Accepted: 06/25/2014] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Selection pressure on the number of teats has been applied to be able to provide enough teats for the increase in litter size in pigs. Although many QTL were reported, they cover large chromosomal regions and the functional mutations and their underlying biological mechanisms have not yet been identified. To gain a better insight in the genetic architecture of the trait number of teats, we performed a genome-wide association study by genotyping 936 Large White pigs using the Illumina PorcineSNP60 Beadchip. The analysis is based on deregressed breeding values to account for the dense family structure and a Bayesian approach for estimation of the SNP effects. RESULTS The genome-wide association study resulted in 212 significant SNPs. In total, 39 QTL regions were defined including 170 SNPs on 13 Sus scrofa chromosomes (SSC) of which 5 regions on SSC7, 9, 10, 12 and 14 were highly significant. All significantly associated regions together explain 9.5% of the genetic variance where a QTL on SSC7 explains the most genetic variance (2.5%). For the five highly significant QTL regions, a search for candidate genes was performed. The most convincing candidate genes were VRTN and Prox2 on SSC7, MPP7, ARMC4, and MKX on SSC10, and vertebrae δ-EF1 on SSC12. All three QTL contain candidate genes which are known to be associated with vertebral development. In the new QTL regions on SSC9 and SSC14, no obvious candidate genes were identified. CONCLUSIONS Five major QTL were found at high resolution on SSC7, 9, 10, 12, and 14 of which the QTL on SSC9 and SSC14 are the first ones to be reported on these chromosomes. The significant SNPs found in this study could be used in selection to increase number of teats in pigs, so that the increasing number of live-born piglets can be nursed by the sow. This study points to common genetic mechanisms regulating number of vertebrae and number of teats.
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Affiliation(s)
- Naomi Duijvesteijn
- />TOPIGS Research Center IPG, PO Box 43, 6640AA Beuningen, The Netherlands
| | - Jacqueline M Veltmaat
- />Institute of Molecular and Cell Biology, A*STAR (Agency for Science, Technology and Research), 61, Biopolis Drive, Singapore, Singapore 138673
| | - Egbert F Knol
- />TOPIGS Research Center IPG, PO Box 43, 6640AA Beuningen, The Netherlands
| | - Barbara Harlizius
- />TOPIGS Research Center IPG, PO Box 43, 6640AA Beuningen, The Netherlands
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Chuang HN, Hsiao KM, Chang HY, Wu CC, Pan H. The homeobox transcription factor Irxl1 negatively regulates MyoD expression and myoblast differentiation. FEBS J 2014; 281:2990-3003. [PMID: 24814716 DOI: 10.1111/febs.12837] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Revised: 04/07/2014] [Accepted: 04/30/2014] [Indexed: 11/29/2022]
Abstract
Irxl1/Mkx (Iroquois homeobox-like 1/Mohawk) encodes a member of the TALE subfamily of homeodomain proteins. It is expressed in multiple mesoderm-derived tissues and has recently been shown to regulate tendon differentiation during mouse embryonic development. Previously we showed that knockdown of Irxl1 in zebrafish caused a deficit in neural crest cells which consequently resulted in deformation of craniofacial muscles and arch cartilages. Here, we further demonstrate that loss of Irxl1 function results in deformed somites with disordered muscle fibers and myotendinous junctions. Because expression of myoD is increased in the somites of Irxl1 knockdown morphants, we test whether Irxl1 negatively regulates myoD expression. When stable C2C12 myoblasts overexpressing Irxl1/Mkx were induced to differentiate, myotube formation was inhibited and protein levels of myoD and myosin heavy chain were decreased accordingly. A series of deletion constructs of myoD promoter fragments were tested by luciferase reporter assays, which identified a promoter fragment that is necessary and sufficient for Irxl1-mediated repression. Direct interaction of Irxl1 and myoD promoter was subsequently elucidated by yeast one-hybrid assays, electrophoretic mobility shift assays and chromatin immunoprecipitation analysis. Furthermore, mouse Mkx also binds to and represses myoD promoter. These results indicate that Irxl1/Mkx can repress myoD expression through direct binding to its promoter and may thus play a negative regulatory role in muscle differentiation.
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Affiliation(s)
- Han-Ni Chuang
- Department of Life Science and Institute of Molecular Biology, National Chung Cheng University, Chia-Yi, Taiwan; Department of Biomedical Sciences, Chung Shan Medical University, Taichung, Taiwan
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Liu H, Zhu S, Zhang C, Lu P, Hu J, Yin Z, Ma Y, Chen X, OuYang H. Crucial transcription factors in tendon development and differentiation: their potential for tendon regeneration. Cell Tissue Res 2014; 356:287-98. [PMID: 24705622 DOI: 10.1007/s00441-014-1834-8] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Accepted: 01/30/2014] [Indexed: 12/22/2022]
Abstract
Tendons that connect muscles to bone are often the targets of sports injuries. The currently unsatisfactory state of tendon repair is largely attributable to the limited understanding of basic tendon biology. A number of tendon lineage-related transcription factors have recently been uncovered and provide clues for the better understanding of tendon development. Scleraxis and Mohawk have been identified as critical transcription factors in tendon development and differentiation. Other transcription factors, such as Sox9 and Egr1/2, have also been recently reported to be involved in tendon development. However, the molecular mechanisms and application of these transcription factors remain largely unclear and this prohibits their use in tendon therapy. Here, we systematically review and analyze recent findings and our own data concerning tendon transcription factors and tendon regeneration. Based on these findings, we provide interaction and temporal programming maps of transcription factors, as a basis for future tendon therapy. Finally, we discuss future directions for tendon regeneration with differentiation and trans-differentiation approaches based on transcription factors.
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Affiliation(s)
- Huanhuan Liu
- Center for Stem Cell and Tissue Engineering, School of Medicine, Zhejiang University, 866 Yu Hang Tang Road, Hangzhou, 310058, China
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The Mohawk homeobox transcription factor regulates the differentiation of tendons and volar plates. J Orthop Sci 2014; 19:172-80. [PMID: 24166359 PMCID: PMC3943675 DOI: 10.1007/s00776-013-0485-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Accepted: 10/08/2013] [Indexed: 12/27/2022]
Abstract
BACKGROUND Mohawk (Mkx) is a homeodomain-containing transcription factor that is expressed in various mesoderm-derived tissues, particularly in developing tendons. In this study, we investigate the exact expression pattern and functions of Mkx in forelimbs. METHODS We analyzed the forelimbs of Mkx knockout mice [from embryonic day (E) 18.5 to postnatal day (P) 28 weeks] by using knocked-in Venus signals, Masson trichrome staining, and hematoxylin and eosin (H&E) staining. RESULTS We detected Venus signals in forelimb tendons, pulleys, and volar plates (VPs) in P21 mice. In-depth histological analysis showed that compared to the wild-type mice, the Mkx knockout mice showed significant hypoplasia in the flexor digitorum profundus tendons from E18.5. The VPs and pulleys appeared normal until P0; however, by P14, they became increasingly thicker in Mkx-null mice compared to wild-type mice. The fiber alignment was particularly disrupted in VPs of Mkx-null mice. CONCLUSIONS These results suggest that Mkx is an important regulator of the differentiation of VPs and pulleys, as well as of tendon differentiation.
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Rowton M, Ramos P, Anderson DM, Rhee JM, Cunliffe HE, Rawls A. Regulation of mesenchymal-to-epithelial transition by PARAXIS during somitogenesis. Dev Dyn 2013; 242:1332-44. [PMID: 24038871 DOI: 10.1002/dvdy.24033] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Revised: 08/15/2013] [Accepted: 08/15/2013] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Dynamic alterations in cell shape, migration, and adhesion play a central role in tissue morphogenesis during embryonic development and congenital disease. The mesenchymal-to-epithelial transition that occurs during vertebrate somitogenesis is required for proper patterning of the axial musculoskeletal system. Somitic MET is initiated in the presomitic mesoderm by PARAXIS-dependent changes in cell adhesion, cell polarity, and the composition of the extracellular matrix. However, the target genes downstream of the transcription factor PARAXIS remain poorly described. RESULTS A genome-wide comparison of gene expression in the anterior presomitic mesoderm and newly formed somites of Paraxis(-/-) embryos resulted in a set of deregulated genes enriched for factors associated with extracellular matrix and cytoskeletal organization and cell-cell and cell-ECM adhesion. The greatest change in expression was seen in fibroblast activation protein alpha (Fap), encoding a dipeptidyl peptidase capable of increasing fibronectin and collagen fiber organization in extracellular matrix. Further, downstream genes in the Wnt and Notch signaling pathways were downregulated, predicting that PARAXIS participates in positive feedback loops in both pathways. CONCLUSIONS These data demonstrate that PARAXIS initiates and stabilizes somite epithelialization by integrating signals from multiple pathways to control the reorganization of the ECM, cytoskeleton, and adhesion junctions during MET.
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Affiliation(s)
- Megan Rowton
- School of Life Sciences, Arizona State University, Tempe, Arizona
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Mazzio EA, Soliman KFA. Basic concepts of epigenetics: impact of environmental signals on gene expression. Epigenetics 2012; 7:119-30. [PMID: 22395460 DOI: 10.4161/epi.7.2.18764] [Citation(s) in RCA: 151] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Through epigenetic modifications, specific long-term phenotypic consequences can arise from environmental influence on slowly evolving genomic DNA. Heritable epigenetic information regulates nucleosomal arrangement around DNA and determines patterns of gene silencing or active transcription. One of the greatest challenges in the study of epigenetics as it relates to disease is the enormous diversity of proteins, histone modifications and DNA methylation patterns associated with each unique maladaptive phenotype. This is further complicated by a limitless combination of environmental cues that could alter the epigenome of specific cell types, tissues, organs and systems. In addition, complexities arise from the interpretation of studies describing analogous but not identical processes in flies, plants, worms, yeast, ciliated protozoans, tumor cells and mammals. This review integrates fundamental basic concepts of epigenetics with specific focus on how the epigenetic machinery interacts and operates in continuity to silence or activate gene expression. Topics covered include the connection between DNA methylation, methyl-CpG-binding proteins, transcriptional repression complexes, histone residues, histone modifications that mediate gene repression or relaxation, histone core variant stability, H1 histone linker flexibility, FACT complex, nucleosomal remodeling complexes, HP1 and nuclear lamins.
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Affiliation(s)
- Elizabeth A Mazzio
- College of Pharmacy and Pharmaceutical Sciences, Florida A & M University, Tallahassee, FL USA
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Anderson DM, George R, Noyes MB, Rowton M, Liu W, Jiang R, Wolfe SA, Wilson-Rawls J, Rawls A. Characterization of the DNA-binding properties of the Mohawk homeobox transcription factor. J Biol Chem 2012; 287:35351-35359. [PMID: 22923612 DOI: 10.1074/jbc.m112.399386] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The homeobox transcription factor Mohawk (Mkx) is a potent transcriptional repressor expressed in the embryonic precursors of skeletal muscle, cartilage, and bone. MKX has recently been shown to be a critical regulator of musculoskeletal tissue differentiation and gene expression; however, the genetic pathways through which MKX functions and its DNA-binding properties are currently unknown. Using a modified bacterial one-hybrid site selection assay, we determined the core DNA-recognition motif of the mouse monomeric Mkx homeodomain to be A-C-A. Using cell-based assays, we have identified a minimal Mkx-responsive element (MRE) located within the Mkx promoter, which is composed of a highly conserved inverted repeat of the core Mkx recognition motif. Using the minimal MRE sequence, we have further identified conserved MREs within the locus of Sox6, a transcription factor that represses slow fiber gene expression during skeletal muscle differentiation. Real-time PCR and immunostaining of in vitro differentiated muscle satellite cells isolated from Mkx-null mice revealed an increase in the expression of Sox6 and down-regulation of slow fiber structural genes. Together, these data identify the unique DNA-recognition properties of MKX and reveal a novel role for Mkx in promoting slow fiber type specification during skeletal muscle differentiation.
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Affiliation(s)
- Douglas M Anderson
- School of Life Sciences, Biodesign Institute, Arizona State University, Tempe, Arizona 85287-4501; Molecular and Cellular Biology Graduate Program, Biodesign Institute, Arizona State University, Tempe, Arizona 85287-4501
| | - Rajani George
- School of Life Sciences, Biodesign Institute, Arizona State University, Tempe, Arizona 85287-4501; Molecular and Cellular Biology Graduate Program, Biodesign Institute, Arizona State University, Tempe, Arizona 85287-4501
| | - Marcus B Noyes
- Program in Gene Function and Expression, University of Massachusetts Medical School, Worcester, Massachusetts 01605; Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts 01605
| | - Megan Rowton
- School of Life Sciences, Biodesign Institute, Arizona State University, Tempe, Arizona 85287-4501; Molecular and Cellular Biology Graduate Program, Biodesign Institute, Arizona State University, Tempe, Arizona 85287-4501
| | - Wenjin Liu
- Department of Biomedical Genetics and Center for Oral Biology, University of Rochester School of Medicine and Dentistry, Rochester, New York 14642
| | - Rulang Jiang
- Department of Biomedical Genetics and Center for Oral Biology, University of Rochester School of Medicine and Dentistry, Rochester, New York 14642
| | - Scot A Wolfe
- Program in Gene Function and Expression, University of Massachusetts Medical School, Worcester, Massachusetts 01605; Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts 01605
| | - Jeanne Wilson-Rawls
- School of Life Sciences, Biodesign Institute, Arizona State University, Tempe, Arizona 85287-4501
| | - Alan Rawls
- School of Life Sciences, Biodesign Institute, Arizona State University, Tempe, Arizona 85287-4501; Center for Evolutionary Medicine and Informatics, Biodesign Institute, Arizona State University, Tempe, Arizona 85287-4501.
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