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Vollebregt AAM, Ebbink BJ, Rizopoulos D, Lequin MH, Aarsen FK, Shapiro EG, van der Ploeg AT, van den Hout JMP. Can serial cerebral MRIs predict the neuronopathic phenotype of MPS II? J Inherit Metab Dis 2021; 44:751-762. [PMID: 33330992 PMCID: PMC8248480 DOI: 10.1002/jimd.12342] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 12/07/2020] [Accepted: 12/14/2020] [Indexed: 11/10/2022]
Abstract
OBJECTIVE To advance the prediction of the neurocognitive development in MPS II patients by jointly analyzing MRI and neurocognitive data in mucopolysaccharidosis (MPS) II patients. METHODS Cognitive ability scores (CAS) were obtained by neuropsychological testing. Cerebral MRIs were quantified using a disease-specific protocol. MRI sumscores were calculated for atrophy, white-matter abnormalities (WMA) and Virchow-Robin spaces (VRS). To distinguish between atrophy and hydrocephalus the Evans' index and the callosal angle (CA) were measured. A random effects repeated measurement model was used to correlate CAS with the three MRI sumscores. RESULTS MRI (n = 47) and CAS scores (n = 78) of 19 male patients were analyzed. Ten patients were classified as neuronopathic and nine as non-neuronopathic. Neuronopathic patients had normal cognitive development until age 3 years. Mental age plateaued between ages 3 and 6, and subsequently declined with loss of skills at a maximum developmental age of 4 years. MRIs of neuronopathic patients showed abnormal atrophy sumscores before CAS dropped below the threshold for intellectual disability (<70). White-matter abnormalities (WMA) and brain atrophy progressed. The calculated sumscores were inversely correlated with CAS (r = -.90 for atrophy and -.69 for WMA). This was not biased by the influence of hydrocephalus as shown by measurement of the Evans' and callosal angle. Changes over time in the Virchow-Robin spaces (VRS) on MRI were minimal. CONCLUSION In our cohort, brain atrophy showed a stronger correlation to a decline in CAS when compared to WMA. Atrophy-scores were higher in young neuronopathic patients than in non-neuronopathic patients and atrophy was an important early sign for the development of the neuronopathic phenotype, especially when observed jointly with white-matter abnormalities.
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Affiliation(s)
- Audrey A. M. Vollebregt
- Center for Lysosomal and Metabolic Diseases (Department of Pediatrics)Erasmus MC, University Medical CenterRotterdamThe Netherlands
- Department of PediatricsMaastricht University Medical CenterMaastrichtThe Netherlands
| | - Berendine J. Ebbink
- Center for Lysosomal and Metabolic Diseases (Department of Pediatrics)Erasmus MC, University Medical CenterRotterdamThe Netherlands
| | - Dimitris Rizopoulos
- Department of BiostatisticsErasmus MC, University Medical CenterRotterdamThe Netherlands
| | - Maarten H. Lequin
- Department of RadiologyImaging Division & Utrecht Cancer CenterUtrechtThe Netherlands
| | - Femke K. Aarsen
- Department of Psychosocial Care and PsychologyPrincess Maxima Center for Pediatric CancerUtrechtThe Netherlands
| | - Elsa G. Shapiro
- Center for Neurobehavioral DevelopmentUniversity of MinnesotaMinneapolisMinnesotaUSA
| | - Ans T. van der Ploeg
- Center for Lysosomal and Metabolic Diseases (Department of Pediatrics)Erasmus MC, University Medical CenterRotterdamThe Netherlands
| | - Johanna M. P. van den Hout
- Center for Lysosomal and Metabolic Diseases (Department of Pediatrics)Erasmus MC, University Medical CenterRotterdamThe Netherlands
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Coelho A, Fernandes HM, Magalhães R, Moreira PS, Marques P, Soares JM, Amorim L, Portugal‐Nunes C, Castanho T, Santos NC, Sousa N. Reorganization of brain structural networks in aging: A longitudinal study. J Neurosci Res 2021; 99:1354-1376. [PMID: 33527512 PMCID: PMC8248023 DOI: 10.1002/jnr.24795] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 12/31/2020] [Indexed: 12/12/2022]
Abstract
Normal aging is characterized by structural and functional changes in the brain contributing to cognitive decline. Structural connectivity (SC) describes the anatomical backbone linking distinct functional subunits of the brain and disruption of this communication is thought to be one of the potential contributors for the age-related deterioration observed in cognition. Several studies already explored brain network's reorganization during aging, but most focused on average connectivity of the whole-brain or in specific networks, such as the resting-state networks. Here, we aimed to characterize longitudinal changes of white matter (WM) structural brain networks, through the identification of sub-networks with significantly altered connectivity along time. Then, we tested associations between longitudinal changes in network connectivity and cognition. We also assessed longitudinal changes in topological properties of the networks. For this, older adults were evaluated at two timepoints, with a mean interval time of 52.8 months (SD = 7.24). WM structural networks were derived from diffusion magnetic resonance imaging, and cognitive status from neurocognitive testing. Our results show age-related changes in brain SC, characterized by both decreases and increases in connectivity weight. Interestingly, decreases occur in intra-hemispheric connections formed mainly by association fibers, while increases occur mostly in inter-hemispheric connections and involve association, commissural, and projection fibers, supporting the last-in-first-out hypothesis. Regarding topology, two hubs were lost, alongside with a decrease in connector-hub inter-modular connectivity, reflecting reduced integration. Simultaneously, there was an increase in the number of provincial hubs, suggesting increased segregation. Overall, these results confirm that aging triggers a reorganization of the brain structural network.
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Affiliation(s)
- Ana Coelho
- Life and Health Sciences Research Institute (ICVS), School of MedicineUniversity of MinhoBragaPortugal
- ICVS/3B’s, PT Government Associate LaboratoryBraga/GuimarãesPortugal
- Clinical Academic Center – BragaBragaPortugal
| | - Henrique M. Fernandes
- Center for Music in the Brain (MIB)Aarhus UniversityAarhusDenmark
- Department of PsychiatryUniversity of OxfordOxfordUK
| | - Ricardo Magalhães
- Life and Health Sciences Research Institute (ICVS), School of MedicineUniversity of MinhoBragaPortugal
- ICVS/3B’s, PT Government Associate LaboratoryBraga/GuimarãesPortugal
- Clinical Academic Center – BragaBragaPortugal
| | - Pedro S. Moreira
- Life and Health Sciences Research Institute (ICVS), School of MedicineUniversity of MinhoBragaPortugal
- ICVS/3B’s, PT Government Associate LaboratoryBraga/GuimarãesPortugal
- Clinical Academic Center – BragaBragaPortugal
| | - Paulo Marques
- Life and Health Sciences Research Institute (ICVS), School of MedicineUniversity of MinhoBragaPortugal
- ICVS/3B’s, PT Government Associate LaboratoryBraga/GuimarãesPortugal
- Clinical Academic Center – BragaBragaPortugal
| | - José M. Soares
- Life and Health Sciences Research Institute (ICVS), School of MedicineUniversity of MinhoBragaPortugal
- ICVS/3B’s, PT Government Associate LaboratoryBraga/GuimarãesPortugal
- Clinical Academic Center – BragaBragaPortugal
| | - Liliana Amorim
- Life and Health Sciences Research Institute (ICVS), School of MedicineUniversity of MinhoBragaPortugal
- ICVS/3B’s, PT Government Associate LaboratoryBraga/GuimarãesPortugal
- Clinical Academic Center – BragaBragaPortugal
| | - Carlos Portugal‐Nunes
- Life and Health Sciences Research Institute (ICVS), School of MedicineUniversity of MinhoBragaPortugal
- ICVS/3B’s, PT Government Associate LaboratoryBraga/GuimarãesPortugal
- Clinical Academic Center – BragaBragaPortugal
| | - Teresa Castanho
- Life and Health Sciences Research Institute (ICVS), School of MedicineUniversity of MinhoBragaPortugal
- ICVS/3B’s, PT Government Associate LaboratoryBraga/GuimarãesPortugal
- Clinical Academic Center – BragaBragaPortugal
| | - Nadine Correia Santos
- Life and Health Sciences Research Institute (ICVS), School of MedicineUniversity of MinhoBragaPortugal
- ICVS/3B’s, PT Government Associate LaboratoryBraga/GuimarãesPortugal
- Clinical Academic Center – BragaBragaPortugal
| | - Nuno Sousa
- Life and Health Sciences Research Institute (ICVS), School of MedicineUniversity of MinhoBragaPortugal
- ICVS/3B’s, PT Government Associate LaboratoryBraga/GuimarãesPortugal
- Clinical Academic Center – BragaBragaPortugal
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Zhang X, Paalvast Y, Wang Y, Rensen PCN, Groen AK. A hierarchical dynamic model used for investigating feed efficiency and its relationship with hepatic gene expression in APOE*3-Leiden.CETP mice. Physiol Rep 2021; 9:e14832. [PMID: 33932122 PMCID: PMC8087979 DOI: 10.14814/phy2.14832] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 03/12/2021] [Accepted: 03/12/2021] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Feed efficiency (FE) is an important trait for livestock and humans. While the livestock industry focuses on increasing FE, in the current obesogenic society it is more of interest to decrease FE. Hence, understanding mechanisms involved in the regulation of FE and particularly how it can be decreased would help tremendously in counteracting the obesity pandemic. However, it is difficult to accurately measure or calculate FE in humans. In this study, we aimed to address this challenge by developing a hierarchical dynamic model based on humanized mouse data. METHODS We analyzed existing experimental data derived from 105 APOE*3-Leiden.CETP (E3L.CETP) mice fed a high-fat high-cholesterol (HFHC) diet for 1 (N = 20), 2 (N = 19), 3 (N = 20), and 6 (N = 46) month. We developed an ordinary differential equation (ODE) based model to estimate the FE based on the longitudinal data of body weight and food intake. Since the liver plays an important role in maintaining metabolic homeostasis, we evaluated associations between FE and hepatic gene expression levels. Depending on the feeding duration, we observed different relationships between FE and hepatic gene expression levels. RESULTS After 1-month feeding of HFHC diet, we observed that FE was associated with vitamin A metabolism, arachidonic acid metabolism, and the PPAR signaling pathway. After 3- and 6-month feeding of HFHC diet, we observed that FE was associated most strongly with expression levels of Spink1 and H19, genes involved in cell proliferation and glucose metabolism, respectively. CONCLUSIONS In conclusion, our analysis suggests that various biological processes such as vitamin A metabolism, hepatic response to inflammation, and cell proliferation associate with FE at different stages of diet-induced obesity.
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Affiliation(s)
- Xiang Zhang
- Department of Experimental Vascular MedicineAmsterdam University Medical CenterUniversity of AmsterdamAmsterdamThe Netherlands
- Human and Animal PhysiologyWageningen UniversityWageningenThe Netherlands
- Theoretical Biology and BioinformaticsUtrecht UniversityUtrechtThe Netherlands
| | - Yared Paalvast
- Department of PediatricsUniversity Medical Center GroningenGroningenThe Netherlands
| | - Yanan Wang
- Department of PediatricsUniversity Medical Center GroningenGroningenThe Netherlands
- Department of MedicineDivision of EndocrinologyLeiden University Medical CenterLeidenThe Netherlands
- Einthoven Laboratory for Experimental Vascular MedicineLeiden University Medical CenterLeidenThe Netherlands
| | - Patrick C. N. Rensen
- Department of MedicineDivision of EndocrinologyLeiden University Medical CenterLeidenThe Netherlands
- Einthoven Laboratory for Experimental Vascular MedicineLeiden University Medical CenterLeidenThe Netherlands
| | - Albert K. Groen
- Department of Experimental Vascular MedicineAmsterdam University Medical CenterUniversity of AmsterdamAmsterdamThe Netherlands
- Department of PediatricsUniversity Medical Center GroningenGroningenThe Netherlands
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Zonderland J, Gomes DB, Pallada Y, Moldero IL, Camarero‐Espinosa S, Moroni L. Mechanosensitive regulation of stanniocalcin-1 by zyxin and actin-myosin in human mesenchymal stromal cells. Stem Cells 2020; 38:948-959. [PMID: 32379914 PMCID: PMC7497098 DOI: 10.1002/stem.3198] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 03/29/2020] [Accepted: 04/16/2020] [Indexed: 12/16/2022]
Abstract
Stanniocalcin-1 (STC1) secreted by mesenchymal stromal cells (MSCs) has anti-inflammatory functions, reduces apoptosis, and aids in angiogenesis, both in vitro and in vivo. However, little is known about the molecular mechanisms of its regulation. Here, we show that STC1 secretion is increased only under specific cell-stress conditions. We find that this is due to a change in actin stress fibers and actin-myosin tension. Abolishment of stress fibers by blebbistatin and knockdown of the focal adhesion protein zyxin leads to an increase in STC1 secretion. To also study this connection in 3D, where few focal adhesions and actin stress fibers are present, STC1 expression was analyzed in 3D alginate hydrogels and 3D electrospun scaffolds. Indeed, STC1 secretion was increased in these low cellular tension 3D environments. Together, our data show that STC1 does not directly respond to cell stress, but that it is regulated through mechanotransduction. This research takes a step forward in the fundamental understanding of STC1 regulation and can have implications for cell-based regenerative medicine, where cell survival, anti-inflammatory factors, and angiogenesis are critical.
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Affiliation(s)
- Jip Zonderland
- Complex Tissue Regeneration Department, MERLN Institute for Technology‐Inspired Regenerative MedicineMaastricht UniversityMaastrichtThe Netherlands
| | - David B. Gomes
- Complex Tissue Regeneration Department, MERLN Institute for Technology‐Inspired Regenerative MedicineMaastricht UniversityMaastrichtThe Netherlands
| | - Yves Pallada
- Complex Tissue Regeneration Department, MERLN Institute for Technology‐Inspired Regenerative MedicineMaastricht UniversityMaastrichtThe Netherlands
| | - Ivan L. Moldero
- Complex Tissue Regeneration Department, MERLN Institute for Technology‐Inspired Regenerative MedicineMaastricht UniversityMaastrichtThe Netherlands
| | - Sandra Camarero‐Espinosa
- Complex Tissue Regeneration Department, MERLN Institute for Technology‐Inspired Regenerative MedicineMaastricht UniversityMaastrichtThe Netherlands
| | - Lorenzo Moroni
- Complex Tissue Regeneration Department, MERLN Institute for Technology‐Inspired Regenerative MedicineMaastricht UniversityMaastrichtThe Netherlands
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Mornata F, Pepe G, Sfogliarini C, Brunialti E, Rovati G, Locati M, Maggi A, Vegeto E. Reciprocal interference between the NRF2 and LPS signaling pathways on the immune-metabolic phenotype of peritoneal macrophages. Pharmacol Res Perspect 2020; 8:e00638. [PMID: 32794353 PMCID: PMC7426195 DOI: 10.1002/prp2.638] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 07/13/2020] [Accepted: 07/13/2020] [Indexed: 12/15/2022] Open
Abstract
The metabolic and immune adaptation to extracellular signals allows macrophages to carry out specialized functions involved in immune protection and tissue homeostasis. Nuclear factor erythroid 2-related factor 2 (NRF2) is a transcription factor that coordinates cell redox and metabolic responses to stressors. However, the individual and concomitant activation of NRF2 and inflammatory pathways have been poorly investigated in isolated macrophages. We here took advantage of reporter mice for the transcriptional activities of NRF2 and nuclear factor-kB (NFκB), a key transcription factor in inflammation, and observe a persisting reciprocal interference in the response of peritoneal macrophages to the respective activators, tert-Butylhydroquinone (tBHQ) and lipopolysaccharide (LPS). When analyzed separately by gene expression studies, these pathways trigger macrophage-specific metabolic and proliferative target genes that are associated with tBHQ-induced pentose phosphate pathway (PPP) with no proliferative response, and with opposite effects observed with LPS. Importantly, the simultaneous administration of tBHQ + LPS alters the effects of each individual pathway in a target gene-specific manner. In fact, this co-treatment potentiates the effects of tBHQ on the antioxidant enzyme, HMOX1, and the antibacterial enzyme, IRG1, respectively; moreover, the combined treatment reduces tBHQ activity on the glycolytic enzymes, TALDO1 and TKT, and decreases LPS effects on the metabolic enzyme IDH1, the proliferation-related proteins KI67 and PPAT, and the inflammatory cytokines IL-1β, IL-6, and TNFα. Altogether, our results show that the activation of NRF2 redirects the metabolic, immune, and proliferative response of peritoneal macrophages to inflammatory signals, with relevant consequences for the pharmacological treatment of diseases that are associated with unopposed inflammatory responses.
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Affiliation(s)
- Federica Mornata
- Center of Excellence on Neurodegenerative DiseasesUniversity of MilanMilanItaly
- Department of Pharmaceutical SciencesUniversity of MilanMilanItaly
| | - Giovanna Pepe
- Center of Excellence on Neurodegenerative DiseasesUniversity of MilanMilanItaly
- Department of Pharmaceutical SciencesUniversity of MilanMilanItaly
| | - Chiara Sfogliarini
- Center of Excellence on Neurodegenerative DiseasesUniversity of MilanMilanItaly
- Department of Pharmaceutical SciencesUniversity of MilanMilanItaly
| | - Electra Brunialti
- Center of Excellence on Neurodegenerative DiseasesUniversity of MilanMilanItaly
- Department of Health SciencesUniversity of MilanMilanItaly
| | | | - Massimo Locati
- Department of Medical Biotechnologies and Translational MedicineUniversity of MilanMilanItaly
- Humanitas Clinical and Research Center‐ IRCCSRozzanoItaly
| | - Adriana Maggi
- Center of Excellence on Neurodegenerative DiseasesUniversity of MilanMilanItaly
- Department of Pharmaceutical SciencesUniversity of MilanMilanItaly
| | - Elisabetta Vegeto
- Center of Excellence on Neurodegenerative DiseasesUniversity of MilanMilanItaly
- Department of Pharmaceutical SciencesUniversity of MilanMilanItaly
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Chouin‐Carneiro T, Ant TH, Herd C, Louis F, Failloux AB, Sinkins SP. Wolbachia strain wAlbA blocks Zika virus transmission in Aedes aegypti. Med Vet Entomol 2020; 34:116-119. [PMID: 31120156 PMCID: PMC7027442 DOI: 10.1111/mve.12384] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 04/08/2019] [Accepted: 04/24/2019] [Indexed: 05/30/2023]
Abstract
Transinfections of the maternally transmitted endosymbiont Wolbachia pipientis can reduce RNA virus replication and prevent transmission by Aedes aegypti, and also have the capacity to invade wild-type populations, potentially reaching and maintaining high infection frequencies. Levels of virus transmission blocking are positively correlated with Wolbachia intracellular density. Despite reaching high densities in Ae. aegypti, transinfections of wAlbA, a strain native to Aedes albopictus, showed no blocking of Semliki Forest Virus in previous intrathoracic injection challenges. To further characterize wAlbA blocking in Ae. aegypti, adult females were intrathoracically challenged with Zika (ZIKV) and dengue viruses, and then fed a ZIKV-containing bloodmeal. No blocking was observed with either virus when challenged by intrathoracic injection. However, when ZIKV was delivered orally, wAlbA-infected females showed a significant reduction in viral replication and dissemination compared with uninfected controls, as well as a complete absence of virus in saliva. Although other Wolbachia strains have been shown to cause more robust viral blocking in Ae. aegypti, these findings demonstrate that, in principle, wAlbA could be used to reduce virus transmission in this species. Moreover, the results highlight the potential for underestimation of the strength of virus-blocking when based on intrathoracic injection compared with more natural oral challenges.
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Affiliation(s)
- T. Chouin‐Carneiro
- Department of Virology, Arboviruses and Insect VectorsInstitut PasteurParisFrance
| | - T. H. Ant
- MRC‐University of Glasgow Centre for Virus ResearchUniversity of GlasgowGlasgowU.K.
- Biomedical and Life SciencesLancaster UniversityLancasterU.K.
| | - C. Herd
- MRC‐University of Glasgow Centre for Virus ResearchUniversity of GlasgowGlasgowU.K.
- Biomedical and Life SciencesLancaster UniversityLancasterU.K.
| | - F. Louis
- Department of Virology, Arboviruses and Insect VectorsInstitut PasteurParisFrance
| | - A. B. Failloux
- Department of Virology, Arboviruses and Insect VectorsInstitut PasteurParisFrance
| | - S. P. Sinkins
- MRC‐University of Glasgow Centre for Virus ResearchUniversity of GlasgowGlasgowU.K.
- Biomedical and Life SciencesLancaster UniversityLancasterU.K.
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Figeac N, Pruller J, Hofer I, Fortier M, Ortuste Quiroga HP, Banerji CRS, Zammit PS. DEPDC1B is a key regulator of myoblast proliferation in mouse and man. Cell Prolif 2020; 53:e12717. [PMID: 31825138 PMCID: PMC6985657 DOI: 10.1111/cpr.12717] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 08/19/2019] [Accepted: 09/09/2019] [Indexed: 02/07/2023] Open
Abstract
OBJECTIVES DISHEVELLED, EGL-10, PLECKSTRIN (DEP) domain-containing 1B (DEPDC1B) promotes dismantling of focal adhesions and coordinates detachment events during cell cycle progression. DEPDC1B is overexpressed in several cancers with expression inversely correlated with patient survival. Here, we analysed the role of DEPDC1B in the regulation of murine and human skeletal myogenesis. MATERIALS AND METHODS Expression dynamics of DEPDC1B were examined in murine and human myoblasts and rhabdomyosarcoma cells in vitro by RT-qPCR and/or immunolabelling. DEPDC1B function was mainly tested via siRNA-mediated gene knockdown. RESULTS DEPDC1B was expressed in proliferating murine and human myoblasts, with expression then decreasing markedly during myogenic differentiation. SiRNA-mediated knockdown of DEPDC1B reduced myoblast proliferation and induced entry into myogenic differentiation, with deregulation of key cell cycle regulators (cyclins, CDK, CDKi). DEPDC1B and β-catenin co-knockdown was unable to rescue proliferation in myoblasts, suggesting that DEPDC1B functions independently of canonical WNT signalling during myogenesis. DEPDC1B can also suppress RHOA activity in some cell types, but DEPDC1B and RHOA co-knockdown actually had an additive effect by both further reducing proliferation and enhancing myogenic differentiation. DEPDC1B was expressed in human Rh30 rhabdomyosarcoma cells, where DEPDC1B or RHOA knockdown promoted myogenic differentiation, but without influencing proliferation. CONCLUSION DEPDC1B plays a central role in myoblasts by driving proliferation and preventing precocious myogenic differentiation during skeletal myogenesis in both mouse and human.
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Affiliation(s)
- Nicolas Figeac
- King's College LondonRandall Centre for Cell and Molecular BiophysicsLondonUK
| | - Johanna Pruller
- King's College LondonRandall Centre for Cell and Molecular BiophysicsLondonUK
| | - Isabella Hofer
- King's College LondonRandall Centre for Cell and Molecular BiophysicsLondonUK
| | - Mathieu Fortier
- King's College LondonRandall Centre for Cell and Molecular BiophysicsLondonUK
| | | | | | - Peter S. Zammit
- King's College LondonRandall Centre for Cell and Molecular BiophysicsLondonUK
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8
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Eichhorn S, Hörschläger A, Steiner M, Laimer J, Jensen BM, Versteeg SA, Pablos I, Briza P, Jongejan L, Rigby N, Asturias JA, Portolés A, Fernandez‐Rivas M, Papadopoulos NG, Mari A, Poulsen LK, Lackner P, van Ree R, Ferreira F, Gadermaier G. Rational Design, Structure-Activity Relationship, and Immunogenicity of Hypoallergenic Pru p 3 Variants. Mol Nutr Food Res 2019; 63:e1900336. [PMID: 31207117 PMCID: PMC6790652 DOI: 10.1002/mnfr.201900336] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 05/28/2019] [Indexed: 11/09/2022]
Abstract
SCOPE Allergies to lipid transfer proteins involve severe adverse reactions; thus, effective and sustainable therapies are desired. Previous attempts disrupting disulfide bonds failed to maintain immunogenicity; thus, the aim is to design novel hypoallergenic Pru p 3 variants and evaluate the applicability for treatment of peach allergy. METHODS AND RESULTS Pru p 3 proline variant (PV) designed using in silico mutagenesis, cysteine variant (CV), and wild-type Pru p 3 (WT) are purified from Escherichia coli. Variants display homogenous and stable protein conformations with an altered secondary structure in circular dichroism. PV shows enhanced long-term storage capacities compared to CV similar to the highly stable WT. Using sera of 33 peach allergic patients, IgE-binding activity is reduced by 97% (PV) and 71% (CV) compared to WT. Both molecules show strong hypoallergenicity in Pru p 3 ImmunoCAP cross-inhibition and histamine release assays. Immunogenicity of PV is demonstrated with a phosphate-based adjuvant formulation in a mouse model. CONCLUSIONS An in silico approach is used to generate a PV without targeting disulfide bonds, T cell epitopes, or previously reported IgE epitopes of Pru p 3. PV is strongly hypoallergenic while structurally stable and immunogenic, thus representing a promising candidate for peach allergen immunotherapy.
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Affiliation(s)
- Stephanie Eichhorn
- Department of BiosciencesUniversity of SalzburgHellbrunnerstraße 345020SalzburgAustria
| | - Angelika Hörschläger
- Department of BiosciencesUniversity of SalzburgHellbrunnerstraße 345020SalzburgAustria
| | - Markus Steiner
- Department of BiosciencesUniversity of SalzburgHellbrunnerstraße 345020SalzburgAustria
| | - Josef Laimer
- Department of BiosciencesUniversity of SalzburgHellbrunnerstraße 345020SalzburgAustria
| | - Bettina M Jensen
- Allergy Clinic, Dept. 22Herlev‐Gentofte HospitalKildegaardsvej 282900HellerupDenmark
| | - Serge A Versteeg
- Department of Experimental ImmunologyAmsterdam University Medical CentersMeibergdreef 91105AZAmsterdamThe Netherlands
| | - Isabel Pablos
- Department of BiosciencesUniversity of SalzburgHellbrunnerstraße 345020SalzburgAustria
| | - Peter Briza
- Department of BiosciencesUniversity of SalzburgHellbrunnerstraße 345020SalzburgAustria
| | - Laurian Jongejan
- Department of Experimental ImmunologyAmsterdam University Medical CentersMeibergdreef 91105AZAmsterdamThe Netherlands
| | - Neil Rigby
- Food & Health ProgrammeInst. of Food ResearchNorwichNorfolkNR4 7UQUnited Kingdom
| | - Juan A Asturias
- R&D DepartmentROXALL GroupParque Científico y Tecnológico de BizkaiaEdif. 40148170ZamudioSpain
| | - Antonio Portolés
- Department of Clinical PharmacologyHospital Clinico San Carlosc/ Prof. Martín Lagos s/n28040MadridSpain
| | | | - Nikolaos G Papadopoulos
- Division of Infection, Immunity & Respiratory MedicineUniversity of ManchesterRoyal Manchester Children's HospitalManchesterM13 9WLUnited Kingdom
- Allergy Dpt, 2nd Pediatric Clinic, University of Athens41, FidippidouAthens115 27Greece
| | - Adriano Mari
- Center of Molecular AllergologyIDIVia dei Monti di Creta 104ZIP 00167RomeItaly
- Associated Centers for Molecular AllergologyVia Portuense 700ZIP 00149RomeItaly
| | - Lars K Poulsen
- Allergy Clinic, Dept. 22Herlev‐Gentofte HospitalKildegaardsvej 282900HellerupDenmark
| | - Peter Lackner
- Department of BiosciencesUniversity of SalzburgHellbrunnerstraße 345020SalzburgAustria
| | - Ronald van Ree
- Department of Experimental ImmunologyAmsterdam University Medical CentersMeibergdreef 91105AZAmsterdamThe Netherlands
- Department of OtorhinolaryngologyAmsterdam University Medical CentersMeibergdreef 91105AZAmsterdamThe Netherlands
| | - Fatima Ferreira
- Department of BiosciencesUniversity of SalzburgHellbrunnerstraße 345020SalzburgAustria
| | - Gabriele Gadermaier
- Department of BiosciencesUniversity of SalzburgHellbrunnerstraße 345020SalzburgAustria
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