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  1. AU="O'Shaughnessy, R F L"
  2. AU="AlHarfoush, Enmar"
  3. AU="Savill, Edward"
  4. AU="Pavel P. Polyakov"
  5. AU="Robert Haennel"
  6. AU="Robert W. Crawford"
  7. AU="Figueroa, Andres V"
  8. AU="Racca, C."
  9. AU="Slavu, Diana-Maria"
  10. AU="Talbert, Emily"
  11. AU=Abdelnour Loay H
  12. AU=Meisburger Steve P.
  13. AU="Silveira, Fernando A. O."
  14. AU="Toru Nabika"
  15. AU="Vojkovic, Marina"
  16. AU="Gaier, Eric D"
  17. AU="Chandler Crews"
  18. AU="Comte, Marie-Hélène"
  19. AU="Cohen, Or"
  20. AU="Abdellatifi, Mohamed"
  21. AU="Luebbe, Elizabeth"
  22. AU="Emidio, Adriana"
  23. AU=Masmejan Sophie
  24. AU="Samantha Ridley"
  25. AU="Moghaddam-Alvandi, Arash"
  26. AU="Khanolkar, Amey R."
  27. AU="Vasquez Martinez, Rodolfo"
  28. AU="Morgan, E"

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  1. Artikel ; Online: Ceramide kinase-like protein, 'the kinase that isn't', finds a role in skin cancer stress relief.

    O'Shaughnessy, R F L

    The British journal of dermatology

    2021  Band 185, Heft 1, Seite(n) 14–15

    Mesh-Begriff(e) Humans ; Mitogen-Activated Protein Kinases ; Phosphotransferases (Alcohol Group Acceptor) ; Skin Neoplasms/drug therapy
    Chemische Substanzen Phosphotransferases (Alcohol Group Acceptor) (EC 2.7.1.-) ; ceramide kinase (EC 2.7.1.138) ; Mitogen-Activated Protein Kinases (EC 2.7.11.24)
    Sprache Englisch
    Erscheinungsdatum 2021-03-23
    Erscheinungsland England
    Dokumenttyp Journal Article ; Comment
    ZDB-ID 80076-4
    ISSN 1365-2133 ; 0007-0963
    ISSN (online) 1365-2133
    ISSN 0007-0963
    DOI 10.1111/bjd.19888
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  2. Artikel ; Online: Understanding the paradoxical proinflammatory effects of an immunosuppressant.

    O'Shaughnessy, R F L

    The British journal of dermatology

    2021  Band 185, Heft 6, Seite(n) 1091–1092

    Mesh-Begriff(e) Humans ; Immunosuppressive Agents/adverse effects
    Chemische Substanzen Immunosuppressive Agents
    Sprache Englisch
    Erscheinungsdatum 2021-11-08
    Erscheinungsland England
    Dokumenttyp Journal Article ; Comment
    ZDB-ID 80076-4
    ISSN 1365-2133 ; 0007-0963
    ISSN (online) 1365-2133
    ISSN 0007-0963
    DOI 10.1111/bjd.20778
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel ; Online: Ubiquitin, a novel therapeutic target in psoriasis?

    O'Shaughnessy, R F L

    The British journal of dermatology

    2020  Band 184, Heft 1, Seite(n) 8–9

    Mesh-Begriff(e) Epidermis ; Humans ; Inflammation ; Keratinocytes ; NF-kappa B ; Psoriasis/drug therapy ; Ubiquitin ; Ubiquitin-Protein Ligases
    Chemische Substanzen NF-kappa B ; Ubiquitin ; Ubiquitin-Protein Ligases (EC 2.3.2.27)
    Sprache Englisch
    Erscheinungsdatum 2020-07-21
    Erscheinungsland England
    Dokumenttyp Journal Article ; Comment
    ZDB-ID 80076-4
    ISSN 1365-2133 ; 0007-0963
    ISSN (online) 1365-2133
    ISSN 0007-0963
    DOI 10.1111/bjd.19332
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  4. Artikel ; Online: Targeting tryptophan transport and breakdown in basal cell carcinoma.

    O'Shaughnessy, R F L

    The British journal of dermatology

    2019  Band 180, Heft 1, Seite(n) 16–17

    Mesh-Begriff(e) Amino Acid Transport Systems ; Carcinoma, Basal Cell ; Fusion Regulatory Protein 1, Light Chains ; Humans ; Large Neutral Amino Acid-Transporter 1 ; Skin Neoplasms ; Tryptophan
    Chemische Substanzen Amino Acid Transport Systems ; Fusion Regulatory Protein 1, Light Chains ; Large Neutral Amino Acid-Transporter 1 ; SLC7A7 protein, human ; Tryptophan (8DUH1N11BX)
    Sprache Englisch
    Erscheinungsdatum 2019-01-02
    Erscheinungsland England
    Dokumenttyp Journal Article ; Comment
    ZDB-ID 80076-4
    ISSN 1365-2133 ; 0007-0963
    ISSN (online) 1365-2133
    ISSN 0007-0963
    DOI 10.1111/bjd.17316
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  5. Artikel ; Online: Understanding actinic keratosis to reduce squamous cell carcinoma incidence.

    O'Shaughnessy, R F L

    The British journal of dermatology

    2019  Band 182, Heft 4, Seite(n) 834–835

    Mesh-Begriff(e) Carcinoma, Squamous Cell ; Humans ; Incidence ; Keratosis, Actinic ; Skin Neoplasms
    Sprache Englisch
    Erscheinungsdatum 2019-10-16
    Erscheinungsland England
    Dokumenttyp Journal Article ; Comment
    ZDB-ID 80076-4
    ISSN 1365-2133 ; 0007-0963
    ISSN (online) 1365-2133
    ISSN 0007-0963
    DOI 10.1111/bjd.18529
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  6. Artikel ; Online: Tape strips in dermatology research.

    Hughes, A J / Tawfik, S S / Baruah, K P / O'Toole, E A / O'Shaughnessy, R F L

    The British journal of dermatology

    2021  Band 185, Heft 1, Seite(n) 26–35

    Abstract: Tape strips have been used widely in dermatology research as a minimally invasive method to sample the epidermis, avoiding the need for skin biopsies. Most research has focused on epidermal pathology, such as atopic eczema, but there is increasing ... ...

    Abstract Tape strips have been used widely in dermatology research as a minimally invasive method to sample the epidermis, avoiding the need for skin biopsies. Most research has focused on epidermal pathology, such as atopic eczema, but there is increasing research into the use of tape strips in other dermatoses, such as skin cancer, and the microbiome. This review summarizes the technique of tape stripping, and discusses which dermatoses have been studied by tape stripping and alternative minimally invasive sampling methods. We review the number of tape strips needed from each patient and the components of the epidermis that can be obtained by tape stripping. With a focus on protein and RNA extraction, we address the techniques used to process tape strips. There is no optimal protocol to extract protein, as this depends on the abundance of the protein studied, its level of expression in the epidermis and its solubility. Many variables can alter the amount of protein obtained from tape strips, which must be standardized to ensure consistency between samples. No study has compared different RNA extraction techniques, but our own experience is that RNA yield is optimized by using 20 tape strips and the use of a cell scraper.
    Mesh-Begriff(e) Dermatitis, Atopic ; Dermatology ; Epidermal Cells ; Epidermis ; Humans ; Skin
    Sprache Englisch
    Erscheinungsdatum 2021-03-01
    Erscheinungsland England
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 80076-4
    ISSN 1365-2133 ; 0007-0963
    ISSN (online) 1365-2133
    ISSN 0007-0963
    DOI 10.1111/bjd.19760
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  7. Artikel ; Online: AKT1-mediated Lamin A/C degradation is required for nuclear degradation and normal epidermal terminal differentiation.

    Naeem, A S / Zhu, Y / Di, W L / Marmiroli, S / O'Shaughnessy, R F L

    Cell death and differentiation

    2015  Band 22, Heft 12, Seite(n) 2123–2132

    Abstract: Nuclear degradation is a key stage in keratinocyte terminal differentiation and the formation of the cornified envelope that comprises the majority of epidermal barrier function. Parakeratosis, the retention of nuclear material in the cornified layer of ... ...

    Abstract Nuclear degradation is a key stage in keratinocyte terminal differentiation and the formation of the cornified envelope that comprises the majority of epidermal barrier function. Parakeratosis, the retention of nuclear material in the cornified layer of the epidermis, is a common histological observation in many skin diseases, notably in atopic dermatitis and psoriasis. Keratinocyte nuclear degradation is not well characterised, and it is unclear whether the retained nuclei contribute to the altered epidermal differentiation seen in eczema and psoriasis. Loss of AKT1 function strongly correlated with parakeratosis both in eczema samples and in organotypic culture models. Although levels of DNAses, including DNase1L2, were unchanged, proteomic analysis revealed an increase in Lamin A/C. AKT phosphorylates Lamin A/C, targeting it for degradation. Consistent with this, Lamin A/C degradation was inhibited and Lamin A/C was observed in the cornified layer of AKT1 knockdown organotypic cultures, surrounding retained nuclear material. Using AKT-phosphorylation-dead Lamin A constructs we show that the retention of nuclear material is sufficient to cause profound changes in epidermal terminal differentiation, specifically a reduction in Loricrin, Keratin 1, Keratin 10, and filaggrin expression. We show that preventing nuclear degradation upregulates BMP2 expression and SMAD1 signalling. Consistent with these data, we observe both parakeratosis and evidence of increased SMAD1 signalling in atopic dermatitis. We therefore present a model that, in the absence of AKT1-mediated Lamin A/C degradation, DNA degradation processes, such as those mediated by DNAse 1L2, are prevented, leading to parakeratosis and changes in epidermal differentiation.
    Mesh-Begriff(e) Animals ; Bone Morphogenetic Protein 2/metabolism ; Cell Differentiation ; Intermediate Filament Proteins/genetics ; Intermediate Filament Proteins/metabolism ; Keratin-1/genetics ; Keratin-1/metabolism ; Keratin-10/genetics ; Keratin-10/metabolism ; Keratinocytes/cytology ; Keratinocytes/metabolism ; Lamin Type A/metabolism ; Membrane Proteins/genetics ; Membrane Proteins/metabolism ; Mice ; Phosphorylation ; Proto-Oncogene Proteins c-akt/antagonists & inhibitors ; Proto-Oncogene Proteins c-akt/genetics ; Proto-Oncogene Proteins c-akt/metabolism ; RNA Interference ; RNA, Small Interfering/metabolism ; Rats ; Signal Transduction ; Smad1 Protein/metabolism
    Chemische Substanzen Bmp2 protein, mouse ; Bone Morphogenetic Protein 2 ; Intermediate Filament Proteins ; Keratin-1 ; Lamin Type A ; Membrane Proteins ; RNA, Small Interfering ; Smad1 Protein ; filaggrin ; loricrin ; Keratin-10 (147785-83-9) ; Akt1 protein, mouse (EC 2.7.11.1) ; Proto-Oncogene Proteins c-akt (EC 2.7.11.1)
    Sprache Englisch
    Erscheinungsdatum 2015-12
    Erscheinungsland England
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1225672-9
    ISSN 1476-5403 ; 1350-9047
    ISSN (online) 1476-5403
    ISSN 1350-9047
    DOI 10.1038/cdd.2015.62
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  8. Artikel ; Online: Differential expression of secreted factors SOSTDC1 and ADAMTS8 cause profibrotic changes in linear morphoea fibroblasts.

    Badshah, I I / Brown, S / Weibel, L / Rose, A / Way, B / Sebire, N / Inman, G / Harper, J / O'Shaughnessy, R F L

    The British journal of dermatology

    2019  Band 180, Heft 5, Seite(n) 1135–1149

    Abstract: Background: Linear morphoea (LM) is a rare connective tissue disorder characterized by a line of thickened skin and subcutaneous tissue and can also affect the underlying muscle and bone. Little is known about the disease aetiology, with treatment ... ...

    Abstract Background: Linear morphoea (LM) is a rare connective tissue disorder characterized by a line of thickened skin and subcutaneous tissue and can also affect the underlying muscle and bone. Little is known about the disease aetiology, with treatment currently limited to immune suppression, and disease recurrence post-treatment is common.
    Objectives: In order to uncover new therapeutic avenues, the cell-intrinsic changes in LM fibroblasts compared with site-matched controls were characterized.
    Methods: We grew fibroblasts from site-matched affected and unaffected regions from five patients with LM, we subjected them to gene expression analysis and investigation of SMAD signalling.
    Results: Fibroblasts from LM lesions showed increased migration, proliferation, altered collagen processing, and abnormally high basal levels of phosphorylated SMAD2, thereby rendering them less responsive to transforming growth factor (TGF)-β1 and reducing the degree of myofibroblast differentiation, which is a key component of the wound-healing and scarring process in normal skin. Conditioned media from normal fibroblasts could reverse LM-affected fibroblast migration and proliferation, suggesting that the LM phenotype is driven by an altered secretome. Gene array analysis and RNA-Seq indicated upregulation of ADAMTS8 and downregulation of FRAS1 and SOSTDC1. SOSTDC1 knock-down recapitulated the reduced TGF-β1 responsiveness and LM fibroblast migration, while overexpression of ADAMTS8 induced myofibroblast markers.
    Conclusions: We demonstrate that cell-intrinsic changes in the LM fibroblast secretome lead to changes observed in the disease, and that secretome modulation could be a viable therapeutic approach in the treatment of LM.
    Mesh-Begriff(e) ADAMTS Proteins/metabolism ; Adaptor Proteins, Signal Transducing/genetics ; Adaptor Proteins, Signal Transducing/metabolism ; Adolescent ; Animals ; Biopsy ; Cell Movement/genetics ; Cell Proliferation/genetics ; Child ; Extracellular Matrix Proteins/metabolism ; Female ; Fibroblasts/metabolism ; Gene Knockdown Techniques ; Humans ; Male ; Mice ; NIH 3T3 Cells ; Primary Cell Culture ; RNA-Seq ; Scleroderma, Localized/pathology ; Signal Transduction/genetics ; Skin/cytology ; Skin/pathology ; Transforming Growth Factor beta1/metabolism ; Up-Regulation
    Chemische Substanzen Adaptor Proteins, Signal Transducing ; Extracellular Matrix Proteins ; FRAS1 protein, human ; SOSTDC1 protein, human ; TGFB1 protein, human ; Transforming Growth Factor beta1 ; ADAMTS Proteins (EC 3.4.24.-) ; ADAMTS8 protein, human (EC 3.4.24.-)
    Sprache Englisch
    Erscheinungsdatum 2019-01-06
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 80076-4
    ISSN 1365-2133 ; 0007-0963
    ISSN (online) 1365-2133
    ISSN 0007-0963
    DOI 10.1111/bjd.17352
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  9. Artikel ; Online: Rab3Gap1 mediates exocytosis of Claudin-1 and tight junction formation during epidermal barrier acquisition.

    Youssef, G / Gerner, L / Naeem, A S / Ralph, O / Ono, M / O'Neill, C A / O'Shaughnessy, R F L

    Developmental biology

    2013  Band 380, Heft 2, Seite(n) 274–285

    Abstract: Epidermal barrier acquisition during late murine gestation is accompanied by an increase in Akt kinase activity and cJun dephosphorlyation. The latter is directed by the Ppp2r2a regulatory subunit of the Pp2a phosphatase. This was accompanied by a change ...

    Abstract Epidermal barrier acquisition during late murine gestation is accompanied by an increase in Akt kinase activity and cJun dephosphorlyation. The latter is directed by the Ppp2r2a regulatory subunit of the Pp2a phosphatase. This was accompanied by a change of Claudin-1 localisation to the cell surface and interaction between Occludin and Claudin-1 which are thought to be required for tight junction formation. The aim of this study was to determine the nature of the barrier defect caused by the loss of AKT/Ppp2r2a function. There was a paracellular barrier defect in rat epidermal keratinocytes expressing a Ppp2r2a siRNA. In Ppp2r2a knockdown cells, Claudin-1 was located to the cytoplasm and its expression was increased. Inhibiting cJun phosphorylation restored barrier function and plasma membrane localisation of Claudin-1. Expression of the Rab3 GTPase activating protein, Rab3Gap1, was restored in Ppp2r2a siRNA cells when cJun phosphorylation was inhibited. During normal mouse epidermal development, Claudin-1 plasma membrane localisation and Rab3Gap1 cell surface expression were co-incident with Akt activation in mouse epidermis, strongly suggesting a role of Rab3Gap1 in epidermal barrier acquisition. Supporting this hypothesis, siRNA knockdown of Rab3Gap1 prevented plasma membrane Claudin-1 expression and the formation of a barrier competent epithelium. Replacing Rab3Gap1 in Ppp2r2a knockdown cells was sufficient to rescue Claudin-1 transport to the cell surface. Therefore these data suggest Rab3Gap1 mediated exocytosis of Claudin-1 is an important component of epidermal barrier acquisition during epidermal development.
    Mesh-Begriff(e) Animals ; Anthracenes/pharmacology ; Cells, Cultured ; Claudin-1/analysis ; Claudin-1/metabolism ; Epidermis/metabolism ; Exocytosis ; Mice ; Occludin/analysis ; Protein Phosphatase 2/physiology ; Rats ; Tight Junctions/physiology ; rab3 GTP-Binding Proteins/physiology
    Chemische Substanzen Anthracenes ; Claudin-1 ; Cldn1 protein, rat ; Occludin ; Ocln protein, rat ; pyrazolanthrone (1TW30Y2766) ; Protein Phosphatase 2 (EC 3.1.3.16) ; rab3 GTP-Binding Proteins (EC 3.6.5.2)
    Sprache Englisch
    Erscheinungsdatum 2013-05-16
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1114-9
    ISSN 1095-564X ; 0012-1606
    ISSN (online) 1095-564X
    ISSN 0012-1606
    DOI 10.1016/j.ydbio.2013.04.034
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  10. Artikel ; Online: A novel microdeletion in LOR causing autosomal dominant loricrin keratoderma.

    Kinsler, V A / Drury, S / Khan, A / Waelchli, R / Rukaite, G / Barnicoat, A / Lench, N / Harper, J I / O'Shaughnessy, R F L

    The British journal of dermatology

    2014  Band 172, Heft 1, Seite(n) 262–264

    Mesh-Begriff(e) Adult ; Child ; Female ; Frameshift Mutation/genetics ; Gene Deletion ; Humans ; Ichthyosiform Erythroderma, Congenital/genetics ; Male ; Membrane Proteins/genetics ; Proto-Oncogene Proteins c-mdm2/genetics ; Skin Diseases, Genetic/genetics
    Chemische Substanzen Membrane Proteins ; loricrin ; MDM2 protein, human (EC 2.3.2.27) ; Proto-Oncogene Proteins c-mdm2 (EC 2.3.2.27)
    Sprache Englisch
    Erscheinungsdatum 2014-12-09
    Erscheinungsland England
    Dokumenttyp Letter ; Research Support, Non-U.S. Gov't
    ZDB-ID 80076-4
    ISSN 1365-2133 ; 0007-0963
    ISSN (online) 1365-2133
    ISSN 0007-0963
    DOI 10.1111/bjd.13361
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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