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  1. Article ; Online: Gephyrin: a key regulatory protein of inhibitory synapses and beyond.

    Groeneweg, Femke L / Trattnig, Christa / Kuhse, Jochen / Nawrotzki, Ralph A / Kirsch, Joachim

    Histochemistry and cell biology

    2018  Volume 150, Issue 5, Page(s) 489–508

    Abstract: Scaffolding proteins underlying postsynaptic membrane specializations are important structural and functional components of both excitatory and inhibitory synapses. At inhibitory synapses, gephyrin was identified as anchoring protein. Gephyrin self- ... ...

    Abstract Scaffolding proteins underlying postsynaptic membrane specializations are important structural and functional components of both excitatory and inhibitory synapses. At inhibitory synapses, gephyrin was identified as anchoring protein. Gephyrin self-assembles into a complex flat submembranous lattice that slows the lateral mobility of glycine and GABA
    MeSH term(s) Animals ; Carrier Proteins/chemistry ; Carrier Proteins/metabolism ; Humans ; Membrane Proteins/chemistry ; Membrane Proteins/metabolism ; Synapses/drug effects ; Synapses/metabolism
    Chemical Substances Carrier Proteins ; Membrane Proteins ; gephyrin
    Language English
    Publishing date 2018-09-27
    Publishing country Germany
    Document type Journal Article ; Review
    ZDB-ID 1222930-1
    ISSN 1432-119X ; 0301-5564 ; 0948-6143
    ISSN (online) 1432-119X
    ISSN 0301-5564 ; 0948-6143
    DOI 10.1007/s00418-018-1725-2
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Polymorphic differences within HLA-C alleles contribute to alternatively spliced transcripts lacking exon 5.

    Ehlers, Femke A I / Olieslagers, Timo I / Groeneweg, Mathijs / Bos, Gerard M J / Tilanus, Marcel G J / Voorter, Christina E M / Wieten, Lotte

    HLA

    2022  Volume 100, Issue 3, Page(s) 232–243

    Abstract: The HLA genes are amongst the most polymorphic in the human genome. Alternative splicing could add an extra layer of complexity, but has not been studied extensively. Here, we applied an RNA based approach to study the influence of allele polymorphism on ...

    Abstract The HLA genes are amongst the most polymorphic in the human genome. Alternative splicing could add an extra layer of complexity, but has not been studied extensively. Here, we applied an RNA based approach to study the influence of allele polymorphism on alternative splicing of HLA-C in peripheral blood. RNA was isolated from these peripheral cells, converted into cDNA and amplified specifically for 12 common HLA-C allele groups. Through subsequent sequencing of HLA-C, we observed alternative splicing variants of HLA-C*04 and *16 that resulted in exon 5 skipping and were co-expressed with the mature transcript. Investigation of intron 4 sequences of HLA-C*04 and *16 compared with other HLA-C alleles demonstrated no effect on predicted splice sites and branch point. To further investigate if the unique polymorphic positions in exon 5 of HLA-C*04 or *16 may facilitate alternative splicing by acting on splicing regulatory elements (SRE), in-silico splicing analysis was performed. While the HLA-C*04 specific SNP in exon 5 had no effect on predicted exonic SRE, the HLA-C*16 specific exon 5 SNP did alter exonic SRE. Our findings provide experimental and theoretical support for the concept that polymorphisms within the HLA-C alleles influence the alternative splicing of HLA-C.
    MeSH term(s) Alleles ; Alternative Splicing ; Exons/genetics ; HLA-C Antigens/genetics ; Humans ; Introns ; Polymorphism, Genetic ; RNA/genetics
    Chemical Substances HLA-C Antigens ; RNA (63231-63-0)
    Language English
    Publishing date 2022-06-27
    Publishing country England
    Document type Journal Article
    ZDB-ID 2845111-9
    ISSN 2059-2310 ; 2059-2302
    ISSN (online) 2059-2310
    ISSN 2059-2302
    DOI 10.1111/tan.14695
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Mineralocorticoid and glucocorticoid receptors at the neuronal membrane, regulators of nongenomic corticosteroid signalling.

    Groeneweg, Femke L / Karst, Henk / de Kloet, E Ron / Joëls, Marian

    Molecular and cellular endocrinology

    2012  Volume 350, Issue 2, Page(s) 299–309

    Abstract: The balance between corticosteroid actions induced via activation of the mineralocorticoid receptor (MR) and the glucocorticoid receptor (GR) determines the brain's response to stress. While both receptors are best known for their delayed genomic role, ... ...

    Abstract The balance between corticosteroid actions induced via activation of the mineralocorticoid receptor (MR) and the glucocorticoid receptor (GR) determines the brain's response to stress. While both receptors are best known for their delayed genomic role, it has become increasingly evident that they can also associate with the plasma membrane and act as mediators of rapid, nongenomic signalling. Nongenomic corticosteroid actions in the brain are required for the coordination of a rapid adaptive response to stress; membrane-associated MRs and GRs play a major role herein. However, many questions regarding the underlying mechanism are still unresolved. How do MR and GR translocate to the membrane and what are their downstream signalling partners? In this review we discuss these issues based on insights obtained from related receptors, most notably the estrogen receptor α.
    MeSH term(s) Adrenal Cortex Hormones/metabolism ; Animals ; Cell Membrane/metabolism ; Humans ; Models, Biological ; Neurons/metabolism ; Neurons/ultrastructure ; Receptors, Glucocorticoid/genetics ; Receptors, Glucocorticoid/metabolism ; Receptors, Glucocorticoid/physiology ; Receptors, Mineralocorticoid/genetics ; Receptors, Mineralocorticoid/metabolism ; Receptors, Mineralocorticoid/physiology ; Signal Transduction/genetics ; Signal Transduction/physiology
    Chemical Substances Adrenal Cortex Hormones ; Receptors, Glucocorticoid ; Receptors, Mineralocorticoid
    Language English
    Publishing date 2012-03-24
    Publishing country Ireland
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 187438-x
    ISSN 1872-8057 ; 0303-7207
    ISSN (online) 1872-8057
    ISSN 0303-7207
    DOI 10.1016/j.mce.2011.06.020
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Rapid non-genomic effects of corticosteroids and their role in the central stress response.

    Groeneweg, Femke L / Karst, Henk / de Kloet, E Ron / Joëls, Marian

    The Journal of endocrinology

    2011  Volume 209, Issue 2, Page(s) 153–167

    Abstract: In response to a stressful encounter, the brain activates a comprehensive stress system that engages the organism in an adaptive response to the threatening situation. This stress system acts on multiple peripheral tissues and feeds back to the brain; ... ...

    Abstract In response to a stressful encounter, the brain activates a comprehensive stress system that engages the organism in an adaptive response to the threatening situation. This stress system acts on multiple peripheral tissues and feeds back to the brain; one of its key players is the family of corticosteroid hormones. Corticosteroids affect brain functioning through both delayed, genomic and rapid, non-genomic mechanisms. The latter mode of action has long been known, but it is only in recent years that the physiological basis in the brain is beginning to be unravelled. We now know that corticosteroids exert rapid, non-genomic effects on the excitability and activation of neurons in (amongst others) the hypothalamus, hippocampus, amygdala and prefrontal cortex. In addition, corticosteroids affect cognition, adaptive behaviour and neuroendocrine output within minutes. Knowledge on the identity of the receptors and secondary pathways mediating the non-genomic effects of corticosteroids on a cellular level is accumulating. Interestingly, in many cases, an essential role for the 'classical' mineralocorticoid and glucocorticoid receptors in a novel membrane-associated mechanism is found. Here, we systematically review the recent literature on non-genomic actions of corticosteroids on neuronal activity and functioning in selected limbic brain targets. Further, we discuss the relevance of these permissive effects for cognition and neuroendocrine control, and the integration of this novel mode of action into the complex balanced pattern of stress effects in the brain.
    MeSH term(s) Animals ; Behavior, Animal/physiology ; Brain/physiology ; Cognition/physiology ; Corticosterone/physiology ; Humans ; Neurosecretory Systems/physiology ; Stress, Physiological
    Chemical Substances Corticosterone (W980KJ009P)
    Language English
    Publishing date 2011-05
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 3028-4
    ISSN 1479-6805 ; 0022-0795
    ISSN (online) 1479-6805
    ISSN 0022-0795
    DOI 10.1530/JOE-10-0472
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Mineralocorticoid and glucocorticoid receptors at the neuronal membrane, regulators of nongenomic corticosteroid signalling

    Groeneweg, Femke L / Karst, Henk / de Kloet, E. Ron / Joëls, Marian

    Molecular and cellular endocrinology. 2012 Mar. 24, v. 350, no. 2

    2012  

    Abstract: The balance between corticosteroid actions induced via activation of the mineralocorticoid receptor (MR) and the glucocorticoid receptor (GR) determines the brain’s response to stress. While both receptors are best known for their delayed genomic role, ... ...

    Abstract The balance between corticosteroid actions induced via activation of the mineralocorticoid receptor (MR) and the glucocorticoid receptor (GR) determines the brain’s response to stress. While both receptors are best known for their delayed genomic role, it has become increasingly evident that they can also associate with the plasma membrane and act as mediators of rapid, nongenomic signalling. Nongenomic corticosteroid actions in the brain are required for the coordination of a rapid adaptive response to stress; membrane-associated MRs and GRs play a major role herein. However, many questions regarding the underlying mechanism are still unresolved. How do MR and GR translocate to the membrane and what are their downstream signalling partners? In this review we discuss these issues based on insights obtained from related receptors, most notably the estrogen receptor α.
    Keywords brain ; estrogen receptors ; glucocorticoid receptors ; mineralocorticoid receptors ; plasma membrane ; stress response
    Language English
    Dates of publication 2012-0324
    Size p. 299-309.
    Publishing place Elsevier Ireland Ltd
    Document type Article
    ZDB-ID 187438-x
    ISSN 1872-8057 ; 0303-7207
    ISSN (online) 1872-8057
    ISSN 0303-7207
    DOI 10.1016/j.mce.2011.06.020
    Database NAL-Catalogue (AGRICOLA)

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  6. Article ; Online: Quantitation of glucocorticoid receptor DNA-binding dynamics by single-molecule microscopy and FRAP.

    Groeneweg, Femke L / van Royen, Martin E / Fenz, Susanne / Keizer, Veer I P / Geverts, Bart / Prins, Jurrien / de Kloet, E Ron / Houtsmuller, Adriaan B / Schmidt, Thomas S / Schaaf, Marcel J M

    PloS one

    2014  Volume 9, Issue 3, Page(s) e90532

    Abstract: Recent advances in live cell imaging have provided a wealth of data on the dynamics of transcription factors. However, a consistent quantitative description of these dynamics, explaining how transcription factors find their target sequences in the vast ... ...

    Abstract Recent advances in live cell imaging have provided a wealth of data on the dynamics of transcription factors. However, a consistent quantitative description of these dynamics, explaining how transcription factors find their target sequences in the vast amount of DNA inside the nucleus, is still lacking. In the present study, we have combined two quantitative imaging methods, single-molecule microscopy and fluorescence recovery after photobleaching, to determine the mobility pattern of the glucocorticoid receptor (GR) and the mineralocorticoid receptor (MR), two ligand-activated transcription factors. For dexamethasone-activated GR, both techniques showed that approximately half of the population is freely diffusing, while the remaining population is bound to DNA. Of this DNA-bound population about half the GRs appeared to be bound for short periods of time (∼ 0.7 s) and the other half for longer time periods (∼ 2.3 s). A similar pattern of mobility was seen for the MR activated by aldosterone. Inactive receptors (mutant or antagonist-bound receptors) show a decreased DNA binding frequency and duration, but also a higher mobility for the diffusing population. Likely, very brief (≤ 1 ms) interactions with DNA induced by the agonists underlie this difference in diffusion behavior. Surprisingly, different agonists also induce different mobilities of both receptors, presumably due to differences in ligand-induced conformational changes and receptor complex formation. In summary, our data provide a consistent quantitative model of the dynamics of GR and MR, indicating three types of interactions with DNA, which fit into a model in which frequent low-affinity DNA binding facilitates the search for high-affinity target sequences.
    MeSH term(s) Animals ; COS Cells ; Cell Line, Tumor ; Chlorocebus aethiops ; DNA/metabolism ; Fluorescence Recovery After Photobleaching/methods ; Humans ; Microscopy/methods ; Models, Theoretical ; Protein Binding ; Receptors, Glucocorticoid/metabolism ; Receptors, Mineralocorticoid/metabolism
    Chemical Substances Receptors, Glucocorticoid ; Receptors, Mineralocorticoid ; DNA (9007-49-2)
    Language English
    Publishing date 2014-03-14
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1932-6203
    ISSN (online) 1932-6203
    DOI 10.1371/journal.pone.0090532
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Quantitation of glucocorticoid receptor DNA-binding dynamics by single-molecule microscopy and FRAP.

    Femke L Groeneweg / Martin E van Royen / Susanne Fenz / Veer I P Keizer / Bart Geverts / Jurrien Prins / E Ron de Kloet / Adriaan B Houtsmuller / Thomas S Schmidt / Marcel J M Schaaf

    PLoS ONE, Vol 9, Iss 3, p e

    2014  Volume 90532

    Abstract: Recent advances in live cell imaging have provided a wealth of data on the dynamics of transcription factors. However, a consistent quantitative description of these dynamics, explaining how transcription factors find their target sequences in the vast ... ...

    Abstract Recent advances in live cell imaging have provided a wealth of data on the dynamics of transcription factors. However, a consistent quantitative description of these dynamics, explaining how transcription factors find their target sequences in the vast amount of DNA inside the nucleus, is still lacking. In the present study, we have combined two quantitative imaging methods, single-molecule microscopy and fluorescence recovery after photobleaching, to determine the mobility pattern of the glucocorticoid receptor (GR) and the mineralocorticoid receptor (MR), two ligand-activated transcription factors. For dexamethasone-activated GR, both techniques showed that approximately half of the population is freely diffusing, while the remaining population is bound to DNA. Of this DNA-bound population about half the GRs appeared to be bound for short periods of time (∼ 0.7 s) and the other half for longer time periods (∼ 2.3 s). A similar pattern of mobility was seen for the MR activated by aldosterone. Inactive receptors (mutant or antagonist-bound receptors) show a decreased DNA binding frequency and duration, but also a higher mobility for the diffusing population. Likely, very brief (≤ 1 ms) interactions with DNA induced by the agonists underlie this difference in diffusion behavior. Surprisingly, different agonists also induce different mobilities of both receptors, presumably due to differences in ligand-induced conformational changes and receptor complex formation. In summary, our data provide a consistent quantitative model of the dynamics of GR and MR, indicating three types of interactions with DNA, which fit into a model in which frequent low-affinity DNA binding facilitates the search for high-affinity target sequences.
    Keywords Medicine ; R ; Science ; Q
    Subject code 612
    Language English
    Publishing date 2014-01-01T00:00:00Z
    Publisher Public Library of Science (PLoS)
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: Mitochondrial Dynamics in Visual Cortex Are Limited In Vivo and Not Affected by Axonal Structural Plasticity.

    Smit-Rigter, Laura / Rajendran, Rajeev / Silva, Catia A P / Spierenburg, Liselot / Groeneweg, Femke / Ruimschotel, Emma M / van Versendaal, Danielle / van der Togt, Chris / Eysel, Ulf T / Heimel, J Alexander / Lohmann, Christian / Levelt, Christiaan N

    Current biology : CB

    2016  Volume 26, Issue 19, Page(s) 2609–2616

    Abstract: Mitochondria buffer intracellular ... ...

    Abstract Mitochondria buffer intracellular Ca
    Language English
    Publishing date 2016-10-10
    Publishing country England
    Document type Journal Article
    ZDB-ID 1071731-6
    ISSN 1879-0445 ; 0960-9822
    ISSN (online) 1879-0445
    ISSN 0960-9822
    DOI 10.1016/j.cub.2016.07.033
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Effectiveness and safety of the tri-iodothyronine analogue Triac in children and adults with MCT8 deficiency: an international, single-arm, open-label, phase 2 trial.

    Groeneweg, Stefan / Peeters, Robin P / Moran, Carla / Stoupa, Athanasia / Auriol, Françoise / Tonduti, Davide / Dica, Alice / Paone, Laura / Rozenkova, Klara / Malikova, Jana / van der Walt, Adri / de Coo, Irenaeus F M / McGowan, Anne / Lyons, Greta / Aarsen, Femke K / Barca, Diana / van Beynum, Ingrid M / van der Knoop, Marieke M / Jansen, Jurgen /
    Manshande, Martien / Lunsing, Roelineke J / Nowak, Stan / den Uil, Corstiaan A / Zillikens, M Carola / Visser, Frank E / Vrijmoeth, Paul / de Wit, Marie Claire Y / Wolf, Nicole I / Zandstra, Angelique / Ambegaonkar, Gautam / Singh, Yogen / de Rijke, Yolanda B / Medici, Marco / Bertini, Enrico S / Depoorter, Sylvia / Lebl, Jan / Cappa, Marco / De Meirleir, Linda / Krude, Heiko / Craiu, Dana / Zibordi, Federica / Oliver Petit, Isabelle / Polak, Michel / Chatterjee, Krishna / Visser, Theo J / Visser, W Edward

    The lancet. Diabetes & endocrinology

    2019  Volume 7, Issue 9, Page(s) 695–706

    Abstract: Background: Deficiency of the thyroid hormone transporter monocarboxylate transporter 8 (MCT8) causes severe intellectual and motor disability and high serum tri-iodothyronine (T: Methods: In this investigator-initiated, multicentre, open-label, ... ...

    Abstract Background: Deficiency of the thyroid hormone transporter monocarboxylate transporter 8 (MCT8) causes severe intellectual and motor disability and high serum tri-iodothyronine (T
    Methods: In this investigator-initiated, multicentre, open-label, single-arm, phase 2, pragmatic trial, we investigated the effectiveness and safety of oral Triac in male paediatric and adult patients with MCT8 deficiency in eight countries in Europe and one site in South Africa. Triac was administered in a predefined escalating dose schedule-after the initial dose of once-daily 350 μg Triac, the daily dose was increased progressively in 350 μg increments, with the goal of attaining serum total T
    Findings: Between Oct 15, 2014, and June 1, 2017, we screened 50 patients, all of whom were eligible. Of these patients, four (8%) patients decided not to participate because of travel commitments. 46 (92%) patients were therefore enrolled in the trial to receive Triac (median age 7·1 years [range 0·8-66·8]). 45 (98%) participants received Triac and had at least one follow-up measurement of thyroid function and thus were included in the analyses of the primary endpoints. Of these 45 patients, five did not complete the trial (two patients withdrew [travel burden, severe pre-existing comorbidity], one was lost to follow-up, one developed of Graves disease, and one died of sepsis). Patients required a mean dose of 38.3 μg/kg of bodyweight (range 6·4-84·3) to attain T
    Interpretation: Key features of peripheral thyrotoxicosis were alleviated in paediatric and adult patients with MCT8 deficiency who were treated with Triac. Triac seems a reasonable treatment strategy to ameliorate the consequences of untreated peripheral thyrotoxicosis in patients with MCT8 deficiency.
    Funding: Dutch Scientific Organization, Sherman Foundation, NeMO Foundation, Wellcome Trust, UK National Institute for Health Research Cambridge Biomedical Centre, Toulouse University Hospital, and Una Vita Rara ONLUS.
    MeSH term(s) Adolescent ; Child ; Child, Preschool ; Europe ; Follow-Up Studies ; Guidelines as Topic ; Humans ; Infant ; Male ; Membrane Transport Proteins/administration & dosage ; Membrane Transport Proteins/pharmacology ; Mental Retardation, X-Linked/drug therapy ; Mental Retardation, X-Linked/physiopathology ; Muscle Hypotonia/drug therapy ; Muscle Hypotonia/physiopathology ; Muscular Atrophy/drug therapy ; Muscular Atrophy/physiopathology ; Patient Safety ; South Africa ; Triiodothyronine/administration & dosage ; Triiodothyronine/analogs & derivatives ; Triiodothyronine/pharmacology ; Young Adult
    Chemical Substances Membrane Transport Proteins ; Triiodothyronine (06LU7C9H1V) ; 3,3',5-triiodothyroacetic acid (29OQ9EU4R1)
    Language English
    Publishing date 2019-07-31
    Publishing country England
    Document type Clinical Trial, Phase II ; Journal Article ; Multicenter Study ; Research Support, Non-U.S. Gov't
    ISSN 2213-8595
    ISSN (online) 2213-8595
    DOI 10.1016/S2213-8587(19)30155-X
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Mineralocorticoid and glucocorticoid receptors at the neuronal membrane, regulators of nongenomic corticosteroid signalling

    Groeneweg, Femke L. / Karst, Henk / de Kloet, E. Ron / Joëls, Marian

    Molecular and cellular endocrinology

    Volume v. 350,, Issue no. 2

    Abstract: The balance between corticosteroid actions induced via activation of the mineralocorticoid receptor (MR) and the glucocorticoid receptor (GR) determines the brain’s response to stress. While both receptors are best known for their delayed genomic role, ... ...

    Abstract The balance between corticosteroid actions induced via activation of the mineralocorticoid receptor (MR) and the glucocorticoid receptor (GR) determines the brain’s response to stress. While both receptors are best known for their delayed genomic role, it has become increasingly evident that they can also associate with the plasma membrane and act as mediators of rapid, nongenomic signalling. Nongenomic corticosteroid actions in the brain are required for the coordination of a rapid adaptive response to stress; membrane-associated MRs and GRs play a major role herein. However, many questions regarding the underlying mechanism are still unresolved. How do MR and GR translocate to the membrane and what are their downstream signalling partners? In this review we discuss these issues based on insights obtained from related receptors, most notably the estrogen receptor α.
    Keywords estrogen receptors ; glucocorticoid receptors ; plasma membrane ; mineralocorticoid receptors ; brain ; stress response
    Language English
    Document type Article
    ISSN 0303-7207
    Database AGRIS - International Information System for the Agricultural Sciences and Technology

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