Abstract:
:Growth of postmitotic neurons occurs during different stages of development, including metamorphosis, and may also be part of neuronal plasticity and regeneration. Recently we showed that growth of post-mitotic neuroendocrine cells expressing the basic helix loop helix (bHLH) transcription factor Dimmed (Dimm) in Drosophila could be regulated by insulin/IGF signaling and the insulin receptor (dInR). Dimm is also known to confer a secretory phenotype to neuroendocrine cells and can be part of a combinatorial code specifying terminal differentiation in peptidergic neurons. To further understand the mechanisms of Dimm function we ectopically expressed Dimm or Dimm together with dInR in a wide range of Dimm positive and Dimm negative peptidergic neurons, sensory neurons, interneurons, motor neurons, and gut endocrine cells. We provide further evidence that dInR mediated cell growth occurs in a Dimm dependent manner and that one source of insulin-like peptide (DILP) for dInR mediated cell growth in the CNS is DILP6 from glial cells. Expressing both Dimm and dInR in Dimm negative neurons induced growth of cell bodies, whereas dInR alone did not. We also found that Dimm alone can regulate cell growth depending on specific cell type. This may be explained by the finding that the dInR is a direct target of Dimm. Conditional gene targeting experiments showed that Dimm alone could affect cell growth in certain neuron types during metamorphosis or in the adult stage. Another important finding was that ectopic Dimm inhibits apoptosis of several types of neurons normally destined for programmed cell death (PCD). Taken together our results suggest that Dimm plays multiple transcriptional roles at different developmental stages in a cell type-specific manner. In some cell types ectopic Dimm may act together with resident combinatorial code transcription factors and affect terminal differentiation, as well as act in transcriptional networks that participate in long term maintenance of neurons which might lead to blocked apoptosis.
journal_name
Front Mol Neuroscijournal_title
Frontiers in molecular neuroscienceauthors
Liu Y,Luo J,Nässel DRdoi
10.3389/fnmol.2016.00097subject
Has Abstractpub_date
2016-10-13 00:00:00pages
97issn
1662-5099journal_volume
9pub_type
杂志文章abstract::Glioblastoma (GBM) is the most aggressive and malignant primary tumor. Angiogenesis plays a critical role in the progression of GBM. Previous studies have indicated that long non-coding RNAs (lncRNAs) are abnormally expressed in various cancers and participate in the regulation of the malignant behaviors of tumors. Th...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2017.00437
更新日期:2018-01-09 00:00:00
abstract::The astrocyte-specific enzyme glutamine synthetase (GS), which catalyzes the amidation of glutamate to glutamine, plays an essential role in supporting neurotransmission and in limiting NH4+ toxicity. Accordingly, deficits in GS activity contribute to epilepsy and neurodegeneration. Despite its central role in brain p...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
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abstract::GABAergic inhibitory neurotransmission contributes to diverse aspects of brain development and adult plasticity, including the expression of complex cognitive processes. This is afforded for in part by the dynamic adaptations occurring at inhibitory synapses, which show great heterogeneity both in terms of upstream si...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
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abstract::Progressive myoclonus epilepsy of Unverricht-Lundborg type (EPM1) is a neurodegenerative disorder caused by loss-of-function mutations in the cystatin B (CSTB) gene. Progression of the clinical symptoms in EPM1 patients, including stimulus-sensitive myoclonus, tonic-clonic seizures, and ataxia, are well described. How...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2020.570640
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abstract::Cell signaling in response to an array of diverse stress stimuli converges on the phosphorylation of eukaryotic initiation factor-2α (eIF2α). Evidence is accumulating that persistent eIF2α phosphorylation at Ser51 through prolonged overactivation of regulatory kinases occurs in neurodegenerative diseases such as Alzhe...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章,评审
doi:10.3389/fnmol.2014.00022
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abstract::Caenorhabditis elegans somatic protein homeostasis (proteostasis) is actively remodeled at the onset of reproduction. This proteostatic collapse is regulated cell-nonautonomously by signals from the reproductive system that transmit the commitment to reproduction to somatic cells. Here, we asked whether the link betwe...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2017.00101
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abstract::Laminin-α2-related congenital muscular dystrophy (LAMA2-CMD) is a devastating neuromuscular disease caused by mutations in the LAMA2 gene. These mutations result in the complete absence or truncated expression of the laminin-α2 chain. The α2-chain is a major component of the laminin-211 and laminin-221 isoforms, the p...
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abstract::Neurolipids are a class of bioactive lipids that are produced locally through specific biosynthetic pathways in response to extracellular stimuli. Neurolipids are important endogenous regulators of neural cell proliferation, differentiation, oxidative stress, inflammation and apoptosis. Endocannabinoids (eCBs) and lys...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2019.00223
更新日期:2019-09-19 00:00:00
abstract::GABAergic interneuron diversity is a key feature in the brain that helps to create different brain activity patterns and behavioral states. Cell type classification schemes-based on anatomical, physiological and molecular features-have provided us with a detailed understanding of the distinct types that constitute thi...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2019.00115
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abstract::Neuroimaging studies have demonstrated that irritable bowel syndrome (IBS)-a relapsing functional bowel disorder-presents with disrupted brain connections. However, little is known about the alterations of interhemispheric functional connectivity and underlying structural connectivity in IBS. This study combined resti...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
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journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2018.00297
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abstract::γ-Aminobutyric acid type A receptors (GABAARs) mediate the majority of fast synaptic inhibition in the central nervous system (CNS). GABAARs belong to the Cys-loop superfamily of pentameric ligand-gated ion channels (pLGIC) and are assembled from 19 different subunits. As dysfunctional GABAergic neurotransmission mani...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2019.00191
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abstract::Connexin channels play numerous essential roles in virtually every organ by mediating solute exchange between adjacent cells, or between cytoplasm and extracellular milieu. Our understanding of the structure-function relationship of connexin channels relies on X-ray crystallographic data for human connexin 26 (hCx26) ...
journal_title:Frontiers in molecular neuroscience
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doi:10.3389/fnmol.2018.00170
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abstract::Inhibition of nerve growth and plasticity in the CNS is to a large part mediated by Nogo-like signaling, now encompassing a plethora of ligands, receptors, co-receptors and modulators. Here we describe the distribution and levels of mRNA encoding 11 key genes involved in Nogo-like signaling (Nogo-A, Oligodendrocyte-My...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2017.00094
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abstract::Transient global cerebral ischemia (tGCI) causes excessive release of glutamate from neurons. Astrocytic glutamate transporter-1 (GLT-1) and glutamine synthetase (GS) together play a predominant role in maintaining glutamate at normal extracellular concentrations. Though our previous studies reported the alleviation o...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2018.00344
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abstract::Emerging studies have demonstrated that interleukin (IL)-33 and its receptor ST2 act as key factors in inflammatory diseases. Moreover, accumulating evidence has suggested that cytokines, including tumor necrosis factor (TNF)-α and IL-1β, trigger an inflammatory cascade. SIRT1 has been shown to suppress the expression...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2020.00017
更新日期:2020-02-12 00:00:00
abstract::In the last decade, bioinformatic analyses of high-throughput proteomics and transcriptomics data have enabled researchers to gain insight into the molecular networks that may underlie lasting changes in synaptic efficacy. Development and utilization of these techniques have advanced the field of learning and memory s...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章,评审
doi:10.3389/fnmol.2017.00045
更新日期:2017-02-24 00:00:00
abstract::Background: Galectins, a family of non-classically secreted, β-galactoside binding proteins is involved in several brain disorders; however, no systematic knowledge on the normal neuroanatomical distribution and functions of galectins exits. Hence, the major purpose of this study was to understand spatial distribution...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2016.00139
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abstract::The phosphoinositide 3-kinase (PI3K) complex plays important roles in virtually all cells of the body. The enzymatic activity of PI3K to phosphorylate phosphoinositides in the membrane is mediated by a group of catalytic and regulatory subunits. Among those, the class I catalytic subunits, p110α, p110β, p110γ, and p11...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章,评审
doi:10.3389/fnmol.2014.00012
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abstract::Collateral sprouting of surviving axons contributes to the synaptic reorganization after brain injury. To study this clinically relevant phenomenon, we used complex organotypic tissue cultures of mouse entorhinal cortex (EC) and hippocampus (H). Single EC-H cultures were generated to analyze associational sprouting, a...
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doi:10.3389/fnmol.2018.00117
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abstract::Fragile X syndrome (FXS) is the most common form of inherited intellectual disability. It is caused by the overexpansion of cytosine-guanine-guanine (CGG) trinucleotide in Fmr1 gene, resulting in complete loss of the fragile X mental retardation protein (FMRP). Previous studies using Fmr1 knockout (Fmr1 KO) mice have ...
journal_title:Frontiers in molecular neuroscience
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abstract::The constitutively active protein glycogen synthase kinase 3 (GSK3), a serine/threonine kinase, acts paradoxically as a tumor suppressor in some cancers while potentiates growth in others. Deciphering what governs its actions is vital for understanding many pathological conditions, including brain cancer. What are see...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2011.00047
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abstract::Glioblastoma (GBM) is the most aggressive primary intracranial tumor of adults and confers a poor prognosis due to high vascularization. Hence anti-angiogenic therapy has become a promising strategy for GBM treatment. In this study, the transcription factor nuclear factor of activated T-cells 5 (NFAT5) was significant...
journal_title:Frontiers in molecular neuroscience
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doi:10.3389/fnmol.2017.00301
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journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2019.00040
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abstract::The impairment of amyloid-β (Aβ) clearance in the brain plays a causative role in Alzheimer's disease (AD). Polarity distribution of aquaporin-4 (AQP4) is important to remove Aβ from brain. AQP4 polarity can be influenced by the ratio of two AQP4 isoforms M1 and M23 (AQP4-M1/M23), however, it is unknown whether the ra...
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doi:10.3389/fnmol.2017.00395
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abstract::In recent years, signaling through ubiquitin has been shown to be of great importance for normal brain development. Indeed, fluctuations in ubiquitin levels and spontaneous mutations in (de)ubiquitination enzymes greatly perturb synapse formation and neuronal transmission. In the brain, expression of lysine (K) 48-lin...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2016.00043
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journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2017.00118
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abstract::Autism spectrum disorders (ASD) have a higher prevalence in male individuals compared to females, with a ratio of affected boys compared to girls of 4:1 for ASD and 11:1 for Asperger syndrome. Mutations in the SHANK genes (comprising SHANK1, SHANK2 and SHANK3) coding for postsynaptic scaffolding proteins have been tig...
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