Anjana Sevagamoorthy, Adeline Vanderver, Jamie L. Fraser, Jennifer Orthmann-Murphy
{"title":"Glial Origins of Inherited White Matter Disorders","authors":"Anjana Sevagamoorthy, Adeline Vanderver, Jamie L. Fraser, Jennifer Orthmann-Murphy","doi":"10.1101/cshperspect.a041457","DOIUrl":"https://doi.org/10.1101/cshperspect.a041457","url":null,"abstract":"Inherited white matter disorders (IWMDs) are a phenotypically and genotypically heterogeneous group of disorders affecting the central nervous system (CNS) with or without peripheral neuropathy. They are classified either as leukodystrophies (LDs), with primary glial abnormalities, or genetic leukoencephalopathies (gLEs), where other CNS cells are involved. As a group, these disorders are common, with an incidence of 1 in 7500 births. However, IWMDs often go undiagnosed or suffer delayed or misdiagnosis due to their heterogeneous presentation. Many of these disorders present with lethal secondary manifestations that can be prevented through early disease recognition, periodic surveillance, and preventative management. Emerging therapeutics, including gene therapy trials for metachromatic leukodystrophy (MLD) and adrenoleukodystrophy (ALD), suggest disease progression may be slowed or even prevented if treated early. Therapies for IWMDs that target glial cells or the peripheral immune system may provide novel insights for treating acquired disorders of white matter.","PeriodicalId":10494,"journal":{"name":"Cold Spring Harbor perspectives in biology","volume":null,"pages":null},"PeriodicalIF":7.2,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141933438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Anais Franco-Romero, Marco Sandri, Stefano Schiaffino
{"title":"Autophagy in Skeletal Muscle","authors":"Anais Franco-Romero, Marco Sandri, Stefano Schiaffino","doi":"10.1101/cshperspect.a041565","DOIUrl":"https://doi.org/10.1101/cshperspect.a041565","url":null,"abstract":"Skeletal muscle fibers possess, like all cells of our body, an evolutionary conserved autophagy machinery, which allows them to segregate unfolded proteins and damaged organelles within autophagosomes, and to induce fusion of autophagosomes with lysosomes, leading to degradation of those altered cell constituents. This process may be selective for specific cell components, as in the case of glycogen (glycophagy) or organelles, as with mitochondria (mitophagy). The autophagic flux is activated by fasting, and contributes with the proteasome to provide the organism with amino acids required for survival. Autophagy is also essential for the normal turnover of muscle proteins and organelles, as shown by the degenerative changes induced by genetic block of the autophagic mechanism, and in several myopathies. Autophagy is enhanced in muscle by exercise and impaired during aging, suggesting that aging-dependent muscle dysfunction could be delayed by boosting autophagy.","PeriodicalId":10494,"journal":{"name":"Cold Spring Harbor perspectives in biology","volume":null,"pages":null},"PeriodicalIF":7.2,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141933437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The Myotendinous Junction—Form and Function","authors":"Abigail L. Mackey","doi":"10.1101/cshperspect.a041500","DOIUrl":"https://doi.org/10.1101/cshperspect.a041500","url":null,"abstract":"A critical link in the chain of force transmission from muscle fiber cross-bridge to bone is the interface between muscle and tendon—the myotendinous junction (MTJ). To meet the challenge of connecting these two tissues, the MTJ is specialized molecularly and morphologically. Distinct transcriptional profiles are evident for the myonuclei at the myofiber tips and a population of mononuclear tendon cells at the MTJ, demonstrating support from both sides in MTJ maintenance. Paradoxically, despite this high degree of specialization, the MTJ remains susceptible to strain (rupture) injury and is often associated with failed tissue healing. Incomplete understanding of the nature of the MTJ and the elements contributing to its plasticity hinder tackling this unsolved clinical challenge. The goal of this review is to summarize key structural and molecular features of the MTJ, discuss MTJ adaptation in response to mechanical (un)loading, aging, and injury, and highlight the major unanswered questions surrounding the MTJ.","PeriodicalId":10494,"journal":{"name":"Cold Spring Harbor perspectives in biology","volume":null,"pages":null},"PeriodicalIF":7.2,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141933435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The Nodes of Ranvier: Mechanisms of Assembly and Maintenance","authors":"Matthew N. Rasband, Elior Peles","doi":"10.1101/cshperspect.a041361","DOIUrl":"https://doi.org/10.1101/cshperspect.a041361","url":null,"abstract":"Action potential propagation along myelinated axons requires clustered voltage-gated sodium and potassium channels. These channels must be restricted to nodes of Ranvier where the action potential is regenerated. Several mechanisms have evolved to facilitate and ensure the correct assembly and stabilization of these essential axonal domains. This review highlights the current understanding of the axon-intrinsic and glial-extrinsic mechanisms that control the formation and maintenance of the nodes of Ranvier in both the peripheral (PNS) and central (CNS) nervous systems.","PeriodicalId":10494,"journal":{"name":"Cold Spring Harbor perspectives in biology","volume":null,"pages":null},"PeriodicalIF":7.2,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141933439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Won-Suk Chung, Katherine T Baldwin, Nicola J Allen
{"title":"Astrocyte Regulation of Synapse Formation, Maturation, and Elimination.","authors":"Won-Suk Chung, Katherine T Baldwin, Nicola J Allen","doi":"10.1101/cshperspect.a041352","DOIUrl":"10.1101/cshperspect.a041352","url":null,"abstract":"<p><p>Astrocytes play an integral role in the development, maturation, and refinement of neuronal circuits. Astrocytes secrete proteins and lipids that instruct the formation of new synapses and induce the maturation of existing synapses. Through contact-mediated signaling, astrocytes can regulate the formation and state of synapses within their domain. Through phagocytosis, astrocytes participate in the elimination of excess synaptic connections. In this work, we will review key findings on the molecular mechanisms of astrocyte-synapse interaction with a focus on astrocyte-secreted factors, contact-mediated mechanisms, and synapse elimination. We will discuss this in the context of typical brain development and maintenance, as well as consider the consequences of dysfunction in these pathways in neurological disorders, highlighting a role for astrocytes in health and disease.</p>","PeriodicalId":10494,"journal":{"name":"Cold Spring Harbor perspectives in biology","volume":null,"pages":null},"PeriodicalIF":6.9,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11293538/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139721954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The Biology of Lipids.","authors":"Robert G Parton, Kai Simons","doi":"10.1101/cshperspect.a041713","DOIUrl":"10.1101/cshperspect.a041713","url":null,"abstract":"<p><p>Lipids are the defining features of cellular membranes. They act collectively to form a variety of different structures, and understanding their complex behavior represents an early example of systems biology. A multidisciplinary approach is needed to analyse the functions of lipids in biological systems, and new work is providing fascinating insights into their roles in membrane biology, metabolism, signaling, subcellular dynamics and various disease processes.</p>","PeriodicalId":10494,"journal":{"name":"Cold Spring Harbor perspectives in biology","volume":null,"pages":null},"PeriodicalIF":6.9,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11293533/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139691426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Overcoming Obstacles to Gene-Edited Solutions to Climate Challenges.","authors":"L Val Giddings","doi":"10.1101/cshperspect.a041677","DOIUrl":"10.1101/cshperspect.a041677","url":null,"abstract":"<p><p>Gene editing and genetic modification hold enormous potential to deliver solutions to multiple climate change challenges. The most important rate-limiting obstacles impeding their development and deployment are not technical, but rather counterproductive policies and regulations. These are driven in part by the mistaken apprehension of widespread public opposition. These obstacles are described and solutions to overcoming them are presented.</p>","PeriodicalId":10494,"journal":{"name":"Cold Spring Harbor perspectives in biology","volume":null,"pages":null},"PeriodicalIF":6.9,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11293532/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139048450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Robert Ernst, Mike F Renne, Aamna Jain, Alexander von der Malsburg
{"title":"Endoplasmic Reticulum Membrane Homeostasis and the Unfolded Protein Response.","authors":"Robert Ernst, Mike F Renne, Aamna Jain, Alexander von der Malsburg","doi":"10.1101/cshperspect.a041400","DOIUrl":"10.1101/cshperspect.a041400","url":null,"abstract":"<p><p>The endoplasmic reticulum (ER) is the key organelle for membrane biogenesis. Most lipids are synthesized in the ER, and most membrane proteins are first inserted into the ER membrane before they are transported to their target organelle. The composition and properties of the ER membrane must be carefully controlled to provide a suitable environment for the insertion and folding of membrane proteins. The unfolded protein response (UPR) is a powerful signaling pathway that balances protein and lipid production in the ER. Here, we summarize our current knowledge of how aberrant compositions of the ER membrane, referred to as lipid bilayer stress, trigger the UPR.</p>","PeriodicalId":10494,"journal":{"name":"Cold Spring Harbor perspectives in biology","volume":null,"pages":null},"PeriodicalIF":6.9,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11293554/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139520198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Interneuron Diversity: How Form Becomes Function","authors":"Natalia V. De Marco García, Gord Fishell","doi":"10.1101/cshperspect.a041513","DOIUrl":"https://doi.org/10.1101/cshperspect.a041513","url":null,"abstract":"A persistent question in neuroscience is how early neuronal subtype identity is established during the development of neuronal circuits. Despite significant progress in the transcriptomic characterization of cortical interneurons, the mechanisms that control the acquisition of such identities as well as how they relate to function are not clearly understood. Accumulating evidence indicates that interneuron identity is achieved through the interplay of intrinsic genetic and activity-dependent programs. In this work, we focus on how progressive interactions between interneurons and pyramidal cells endow maturing interneurons with transient identities fundamental for their function during circuit assembly and how the elimination of transient connectivity triggers the consolidation of adult subtypes.","PeriodicalId":10494,"journal":{"name":"Cold Spring Harbor perspectives in biology","volume":null,"pages":null},"PeriodicalIF":7.2,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141745458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tessa Arends, Danielle C Hamm, Silvère van der Maarel, Stephen J Tapscott
{"title":"Facioscapulohumeral Dystrophy: Molecular Basis and Therapeutic Opportunities.","authors":"Tessa Arends, Danielle C Hamm, Silvère van der Maarel, Stephen J Tapscott","doi":"10.1101/cshperspect.a041492","DOIUrl":"10.1101/cshperspect.a041492","url":null,"abstract":"<p><p>Facioscapulohumeral dystrophy (FSHD) is caused by misexpression of the early embryonic transcription factor Double Homeobox Protein 4 (DUX4) in skeletal muscle. DUX4 is normally expressed at the 4-cell stage of the human embryo and initiates a portion of the first wave of embryonic gene expression that establishes the totipotent cells of the embryo. Following brief expression, the <i>DUX4</i> locus is suppressed by epigenetic silencing and remains silenced in nearly all somatic cells. Mutations that cause FSHD decrease the efficiency of epigenetic silencing of the <i>DUX4</i> locus and result in aberrant expression of this transcription factor in skeletal muscles. DUX4 expression in these skeletal muscles reactivates part of the early totipotent program and suppresses the muscle program-resulting in a progressive muscular dystrophy that affects some muscles earlier than others. These advances in understanding the cause of FSHD have led to multiple therapeutic strategies that are now entering clinical trials.</p>","PeriodicalId":10494,"journal":{"name":"Cold Spring Harbor perspectives in biology","volume":null,"pages":null},"PeriodicalIF":6.9,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141619506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}