The Role of Connective Tissues Claire Fournier-Thibault, Sonya Nassari, Delphine Duprez
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Non-myogenic Contribution to Muscle Development and Homeostasis: The Role of Connective Tissues Claire Fournier-Thibault, Sonya Nassari, Delphine Duprez To cite this version: Claire Fournier-Thibault, Sonya Nassari, Delphine Duprez. Non-myogenic Contribution to Muscle Development and Homeostasis: The Role of Connective Tissues. Frontiers in Cell and Developmental Biology, Frontiers media, 2017, 1, pp.22 - 22. 10.3389/fcell.2017.00022. hal-01539045 HAL Id: hal-01539045 https://hal.sorbonne-universite.fr/hal-01539045 Submitted on 14 Jun 2017 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. REVIEW published: 23 March 2017 doi: 10.3389/fcell.2017.00022 Non-myogenic Contribution to Muscle Development and Homeostasis: The Role of Connective Tissues Sonya Nassari, Delphine Duprez and 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 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 Edited by: regeneration require interactions with surrounding tissues and the cellular and molecular Juan Jose Sanz-Ezquerro, aspects of this dialogue have not been completely elucidated. During development Consejo Superior de Investigaciones and adult life, myogenic cells are closely associated with the different types of Científicas (CSIC), Spain connective tissue. Connective tissues are defined as specialized (bone and cartilage), Reviewed by: Peleg Hasson, dense regular (tendon and ligament) and dense irregular connective tissue. The role Technion – Israel Institute of of connective tissue in muscle morphogenesis has been investigated, thanks to the Technology, Israel Denitsa Docheva, identification of transcription factors that characterize the different types of connective Universitätsklinikum Regensburg, tissues. Here, we review the development of the various connective tissues in the Germany context of the musculoskeletal system and highlight their important role in delivering Malcolm Logan, King’s College London, UK information necessary for correct muscle morphogenesis, from the early step of myoblast *Correspondence: differentiation to the late stage of muscle maturation. Interactions between muscle Claire Fournier-Thibault and connective tissue are also critical in the adult during muscle regeneration, as [email protected] impairment of the regenerative potential after injury or in neuromuscular diseases results Specialty section: in the progressive replacement of the muscle mass by fibrotic tissue. We conclude This article was submitted to that bi-directional communication between muscle and connective tissue is critical for Signaling, a section of the journal a correct assembly of the musculoskeletal system during development as well as to Frontiers in Cell and Developmental maintain its homeostasis in the adult. Biology Keywords: connective tissue, muscles, bones, tendons, development, regeneration Received: 20 December 2016 Accepted: 07 March 2017 Published: 23 March 2017 INTRODUCTION Citation: Nassari S, Duprez D and Skeletal muscle forms a highly complex and heterogeneous structure, which is part of the Fournier-Thibault C (2017) musculoskeletal system of the body. The process of generating muscles is defined as “myogenesis.” Non-myogenic Contribution to Muscle Development and Homeostasis: The This mechanism occurring during development is an important step in the establishment of the Role of Connective Tissues. musculoskeletal system allowing its essential functions, for instance body motion or the ability Front. Cell Dev. Biol. 5:22. to breath. Myogenesis occurs through successive and overlapping phases that ultimately give doi: 10.3389/fcell.2017.00022 rise to correctly patterned muscles. In the first phase of myogenesis, which is called embryonic Frontiers in Cell and Developmental Biology | www.frontiersin.org 1 March 2017 | Volume 5 | Article 22 Nassari et al. Connective Tissue Regulates Muscle Development myogenesis, embryonic progenitors cells form primary muscle amorphous gel-like and matrix fibers. The amorphous gel-like, fibers, which constitute the scaffold of the muscles. During named ground substance, mostly contains glycoproteins and the second phase of myogenesis named fetal myogenesis, fetal proteoglycans, while the fibrous network is made of collagen progenitors fuse between themselves and with primary fibers to and elastic fibers (Omelyanenko and Slutsky, 2013). Among form secondary fibers and allow muscle growth. Both waves of the supportive CTs, two main types can be distinguished: the myogenesis occur during embryonic development, and involve specialized CT and the dense CT. The specialized CT refers to specific types of muscle progenitors cells. After birth, a third bones and cartilage elements. The dense CT is further divided wave of myogenesis can be activated during muscle regeneration, into two subtypes: the dense regular CT and the dense irregular which occurs after muscle damage. This step involves muscle CT, which refer respectively to tendon/ligament structures and stem cells, so-called muscle satellite cells, which contribute to to CT embedding organs (Table 1). The nature and function muscle reconstruction by fusing with the existing muscle fibers or of these different CTs are predominately determined by the generating new muscle fibers (Stockdale, 1992; Tajbakhsh, 2009; composition and organization of the extracellular matrix. In Tedesco et al., 2010). Studies suggest that embryonic myogenesis dense regular CT, fibroblasts produce a significant amount of is largely exhausted at the end of embryonic development, while collagen fibers that display a spatial organization, while in the fetal and perinatal phases of myogenesis persist to contribute to dense irregular CT, fibroblasts produce collagen fibers that do the majority of adult muscle stem cells (reviewed in Tajbakhsh, not present any specific organization (Omelyanenko and Slutsky, 2009). 2013). The intrinsic molecular signals regulating the different waves of myogenesis have been well described in the literature. Connective Tissue Formation However, the interactions between muscles and adjacent tissues During embryonic development, undifferentiated mesenchymal during development are not completely elucidated. During cells, derived from mesodermal and mesectodermal (neural development and adult life, as part of the musculoskeletal system, crest cells) origins, give rise to the different forms of CT: muscles are closely associated with the other components of bones, cartilage, tendons, ligaments, and irregular CT (Wachtler this system: bone, cartilage, tendon, ligament and irregular et al., 1981). Head CTs originate from neural crest cells, connective tissue, all of them emerging from the family while CTs of the body originate from paraxial or lateral of connective tissues. Although the interactions between the plate mesoderm (Figure 1). The specification and differentiation different components of the musculoskeletal system during processes of the different types of CTs is controlled by specific key development has been highlighted from the 1980’s, more transcription factors or signaling molecules. Irrespective to their recent work has begun to decipher the molecular mechanisms embryological origins, transcription factors have been identified underlying the importance of connective tissue in the regulation for the specification of each type of CT from undifferentiated of developmental and regenerative myogenesis. mesenchymal cells (Figure 2). The scope of this review is to synthesize the data supporting the process of connective tissue-mediated muscle development Specialized Connective Tissue (Bone and Cartilage) and regeneration and to point out the active role of this The embryonic origins of cartilage and bone are multiple. so-called “supporting tissue” in muscle formation and repair. Indeed, elements of the trunk, head and limb skeleton arise Indeed, defect in connective tissue-muscle interactions can lead from three distinct embryonic structures, somites, neural crest to human pathology, as congenital diaphragmatic hernias, a cells and lateral plate mesoderm (Figure 1, Wachtler et al., birth defect of the diaphragm muscle (Merrell et al., 2015), or 1981; Christ and Wilting, 1992; Noden and Trainor, 2005). the Holt-Oram syndrome characterized by skeletal defects of The process of skeleton formation, which corresponds to the the upper limbs and heart anomalies (Hasson et al., 2010). In development of cartilage and bone elements, is initiated by the addition, in skeletal muscle regenerative disorders (muscular condensation of undifferentiated mesenchymal cells at the future dystrophies) as well as in aging (sarcopenia),