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Flink LB, Ghaffarinia A, Papp BT, Varga Á, Vigh AI, Vidács DL, Kui R, Kemény L, Bata-Csörgő Z, Bozó R. Abnormal basement membrane results in increased keratinocyte-derived periostin expression in psoriasis similar to wound healing. Sci Rep 2023; 13:16386. [PMID: 37773198 PMCID: PMC10541889 DOI: 10.1038/s41598-023-43396-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 09/22/2023] [Indexed: 10/01/2023] Open
Abstract
The psoriatic skin resembles wound healing, and it shows abnormalities at the basement membrane (BM), also in the non-lesional skin. Fibroblast-derived dermal periostin has well-known functions in wound healing and Th2-mediated diseases, such as atopic dermatitis. Here we show that serum periostin level was elevated in psoriatic patients, remarkably in the systemically treated ones. Obvious periostin positivity was detected in basal keratinocytes of the non-lesional, lesional, and previously-lesional psoriatic vs. healthy skin. Ex vivo skin models were generated to examine how different skin injuries affect periostin expression during wound healing. Our newly developed cultured salt-split model demonstrated that BM-injury induced periostin expression in basal keratinocytes, and periostin levels in the supernatant were also increased upon healing. In wound healing models, β1-integrin expression was similarly induced. β1-integrin blocking caused reduced periostin expression in in vitro scratch assay, indicating that β1-integrin can mediate periostin production. In contrast to atopic dermatitis, psoriatic basal keratinocytes are in an activated state and show a stable wound healing-like phenotype with the overexpression of periostin. This abnormal BM-induced wound healing as a potential compensatory mechanism can be initiated already in the non-lesional skin present in the lesion and keratinocytes can remain activated in the healed skin.
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Affiliation(s)
- Lili Borbála Flink
- Department of Dermatology and Allergology, Albert Szent-Györgyi Medical School, University of Szeged, Korányi Street 6, Szeged, 6720, Hungary.
- HCEMM-USZ Skin Research Group, University of Szeged, Szeged, 6720, Hungary.
| | - Ameneh Ghaffarinia
- HCEMM-USZ Skin Research Group, University of Szeged, Szeged, 6720, Hungary
| | - Benjamin Tamás Papp
- Department of Dermatology and Allergology, Albert Szent-Györgyi Medical School, University of Szeged, Korányi Street 6, Szeged, 6720, Hungary
| | - Ákos Varga
- Department of Dermatology and Allergology, Albert Szent-Györgyi Medical School, University of Szeged, Korányi Street 6, Szeged, 6720, Hungary
| | - András István Vigh
- Department of Dermatology and Allergology, Albert Szent-Györgyi Medical School, University of Szeged, Korányi Street 6, Szeged, 6720, Hungary
| | - Dániel László Vidács
- Department of Dermatology and Allergology, Albert Szent-Györgyi Medical School, University of Szeged, Korányi Street 6, Szeged, 6720, Hungary
| | - Róbert Kui
- Department of Dermatology and Allergology, Albert Szent-Györgyi Medical School, University of Szeged, Korányi Street 6, Szeged, 6720, Hungary
| | - Lajos Kemény
- Department of Dermatology and Allergology, Albert Szent-Györgyi Medical School, University of Szeged, Korányi Street 6, Szeged, 6720, Hungary
- HCEMM-USZ Skin Research Group, University of Szeged, Szeged, 6720, Hungary
- HUN-REN-SZTE Dermatological Research Group, Hungarian Research Network, Szeged, 6720, Hungary
| | - Zsuzsanna Bata-Csörgő
- Department of Dermatology and Allergology, Albert Szent-Györgyi Medical School, University of Szeged, Korányi Street 6, Szeged, 6720, Hungary
- HCEMM-USZ Skin Research Group, University of Szeged, Szeged, 6720, Hungary
- HUN-REN-SZTE Dermatological Research Group, Hungarian Research Network, Szeged, 6720, Hungary
| | - Renáta Bozó
- Department of Dermatology and Allergology, Albert Szent-Györgyi Medical School, University of Szeged, Korányi Street 6, Szeged, 6720, Hungary
- HCEMM-USZ Skin Research Group, University of Szeged, Szeged, 6720, Hungary
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The Psoriatic Nonlesional Skin: A Battlefield between Susceptibility and Protective Factors. J Invest Dermatol 2021; 141:2785-2790. [PMID: 34216605 DOI: 10.1016/j.jid.2021.05.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 05/20/2021] [Accepted: 05/25/2021] [Indexed: 12/31/2022]
Abstract
In the last two decades, large-scale gene-expression studies on psoriatic skin samples revealed that even though nonlesional skin is macroscopically identical to healthy skin, it harbors several molecular differences. Originally, these molecular differences were thought to represent susceptibility factors for plaque formation. However, we review in this paper the several factors of immune regulation and structural alteration that are specific for the nonlesional skin and serve as protective factors by counteracting plaque formation and contributing to the maintenance of the nonlesional phenotype.
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Bozó R, Danis J, Flink LB, Vidács DL, Kemény L, Bata-Csörgő Z. Stress-Related Regulation Is Abnormal in the Psoriatic Uninvolved Skin. Life (Basel) 2021; 11:life11070599. [PMID: 34201431 PMCID: PMC8303303 DOI: 10.3390/life11070599] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 06/14/2021] [Accepted: 06/21/2021] [Indexed: 11/16/2022] Open
Abstract
Keratinocyte stress-response of the uninvolved psoriatic epidermis is known to be altered compared to healthy cells. Therefore, we aimed to reveal potential mechanisms underlying this alteration. We compared the expression of annotated cell-stress-related proteins between uninvolved psoriatic and healthy skin using the protein array method. Data were analyzed by the Reactome over-representation test. We found that p27/CDKN1B and cytochrome C showed at least a two-fold increase, while cyclooxygenase-2, indolamine-2,3-dioxygenase-1, serum paraoxonase 1, serum paraoxonase 3, serine-46-phosphorylated tumor protein p53, and superoxide-dismutase-2 showed a two-fold decrease in expression in the uninvolved skin. Over-representation analysis suggested the Forkhead-box protein O (FOXO)-mediated transcription as the most significant pathway affected by the differently expressed cell-stress-related proteins (DECSRPs). DECSRPs indicate increased FOXO-mediated transcription of cell-cycle genes and reduced interleukin-signaling in the psoriatic uninvolved skin. Nuclear positivity of the FOXO-signaling-related p27/CDKN1B and FOXO1 are negatively correlated with the disease severity and showed increased expression in the uninvolved epidermis and also in healthy primary keratinocytes, which were grown on cartilage oligomeric matrix protein-coated surfaces. Our results indicate a cell-cycle inhibitory process, as a stress-related compensatory mechanism in the uninvolved epidermis, that could be responsible for blocking keratinocyte hyperproliferation in the psoriatic uninvolved skin, thus maintaining the symptomless skin phenotype.
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Affiliation(s)
- Renáta Bozó
- Department of Dermatology and Allergology, University of Szeged, 6720 Szeged, Hungary; (J.D.); (L.B.F.); (D.L.V.); (L.K.); (Z.B.-C.)
- HCEMM-USZ Skin Research Group, 6720 Szeged, Hungary
- Correspondence: ; Tel.: +36-62-54-64-02
| | - Judit Danis
- Department of Dermatology and Allergology, University of Szeged, 6720 Szeged, Hungary; (J.D.); (L.B.F.); (D.L.V.); (L.K.); (Z.B.-C.)
- HCEMM-USZ Skin Research Group, 6720 Szeged, Hungary
- MTA-SZTE Dermatological Research Group, Eötvös Loránd Research Network, 6720 Szeged, Hungary
| | - Lili Borbála Flink
- Department of Dermatology and Allergology, University of Szeged, 6720 Szeged, Hungary; (J.D.); (L.B.F.); (D.L.V.); (L.K.); (Z.B.-C.)
| | - Dániel László Vidács
- Department of Dermatology and Allergology, University of Szeged, 6720 Szeged, Hungary; (J.D.); (L.B.F.); (D.L.V.); (L.K.); (Z.B.-C.)
| | - Lajos Kemény
- Department of Dermatology and Allergology, University of Szeged, 6720 Szeged, Hungary; (J.D.); (L.B.F.); (D.L.V.); (L.K.); (Z.B.-C.)
- HCEMM-USZ Skin Research Group, 6720 Szeged, Hungary
- MTA-SZTE Dermatological Research Group, Eötvös Loránd Research Network, 6720 Szeged, Hungary
| | - Zsuzsanna Bata-Csörgő
- Department of Dermatology and Allergology, University of Szeged, 6720 Szeged, Hungary; (J.D.); (L.B.F.); (D.L.V.); (L.K.); (Z.B.-C.)
- HCEMM-USZ Skin Research Group, 6720 Szeged, Hungary
- MTA-SZTE Dermatological Research Group, Eötvös Loránd Research Network, 6720 Szeged, Hungary
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Bozó R, Szél E, Danis J, Gubán B, Bata-Csörgő Z, Szabó K, Kemény L, Groma G. Cartilage Oligomeric Matrix Protein Negatively Influences Keratinocyte Proliferation via α5β1-Integrin: Potential Relevance of Altered Cartilage Oligomeric Matrix Protein Expression in Psoriasis. J Invest Dermatol 2020; 140:1733-1742.e7. [PMID: 32057837 DOI: 10.1016/j.jid.2019.12.037] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 11/27/2019] [Accepted: 12/06/2019] [Indexed: 02/06/2023]
Abstract
In psoriasis, nonlesional skin shows alterations at the dermal-epidermal junction compared with healthy skin. Cartilage oligomeric matrix protein (COMP) is part of the papillary dermis of healthy skin, and its expression has not yet been studied in psoriatic skin. In this study, we found that COMP localization extended deeper into the dermis and formed a more continuous layer in psoriatic nonlesional skin compared with healthy skin, whereas in psoriatic lesions, COMP showed a partially discontinuous deposition at the dermal-epidermal junction. COMP and β1-integrin showed strong colocalization in nonlesional skin, where the laminin layer within the basement membrane is discontinuous. In in vitro models, the presence of exogenous COMP decreased the proliferation rate of keratinocytes, and this proliferation-suppressing effect was diminished by blocking α5β1-integrin. Our results suggest that COMP can interact with α5β1-integrin of basal keratinocytes through the disrupted basement membrane, and this interaction might stabilize the epidermis in the nonlesional state by contributing to the suppression of keratinocyte proliferation. The antiproliferative effect of COMP is likely to be relevant to other skin diseases in which chronic nonhealing wounds are coupled with massive COMP accumulation.
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Affiliation(s)
- Renáta Bozó
- Department of Dermatology and Allergology University of Szeged, Szeged, Hungary
| | - Edit Szél
- Department of Dermatology and Allergology University of Szeged, Szeged, Hungary
| | - Judit Danis
- Department of Dermatology and Allergology University of Szeged, Szeged, Hungary; MTA-SZTE Dermatological Research Group, Szeged, Hungary
| | - Barbara Gubán
- Department of Dermatology and Allergology University of Szeged, Szeged, Hungary
| | - Zsuzsanna Bata-Csörgő
- Department of Dermatology and Allergology University of Szeged, Szeged, Hungary; MTA-SZTE Dermatological Research Group, Szeged, Hungary
| | - Kornélia Szabó
- Department of Dermatology and Allergology University of Szeged, Szeged, Hungary; MTA-SZTE Dermatological Research Group, Szeged, Hungary
| | - Lajos Kemény
- Department of Dermatology and Allergology University of Szeged, Szeged, Hungary; MTA-SZTE Dermatological Research Group, Szeged, Hungary; HCEMM-SZTE Skin Research Group, Szeged, Hungary
| | - Gergely Groma
- Department of Dermatology and Allergology University of Szeged, Szeged, Hungary; MTA-SZTE Dermatological Research Group, Szeged, Hungary.
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Genome-Wide DNA Methylation Profiling Identifies Differential Methylation in Uninvolved Psoriatic Epidermis. J Invest Dermatol 2017; 138:1088-1093. [PMID: 29247660 DOI: 10.1016/j.jid.2017.11.036] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 10/27/2017] [Accepted: 11/19/2017] [Indexed: 12/15/2022]
Abstract
Psoriasis is a chronic inflammatory skin disease with both local and systemic components. Genome-wide approaches have identified more than 60 psoriasis-susceptibility loci, but genes are estimated to explain only one-third of the heritability in psoriasis, suggesting additional, yet unidentified, sources of heritability. Epigenetic modifications have been linked to psoriasis and altered DNA methylation patterns in psoriatic versus healthy skin have been reported in whole-skin biopsies. In this study, focusing on epigenetic modifications in the psoriatic uninvolved skin, we compared the lesional and non-lesional epidermis from psoriasis patients with epidermis from healthy controls. We performed an exhaustive genome-wide DNA methylation profiling using reduced representation bisulfite sequencing, which interrogates the methylation status of approximately 3-4 million CpG sites. More than 2,000 strongly differentially methylated sites were identified and a striking overrepresentation of the Wnt and cadherin pathways among the differentially methylated sites was found. In particular, we observe a strong differential methylation in several psoriasis candidate genes. A substantial number of differentially methylated sites present in the uninvolved versus healthy epidermis suggests the presence of a pre-psoriatic state in the clinically healthy skin type. Our exploratory study represents a starting point for identifying biomarkers for psoriasis-prone skin before disease onset.
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1,4-dihydroxy-2-naphthoic Acid Induces Apoptosis in Human Keratinocyte: Potential Application for Psoriasis Treatment. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2013; 2013:792840. [PMID: 23690852 PMCID: PMC3638593 DOI: 10.1155/2013/792840] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Revised: 02/25/2013] [Accepted: 02/27/2013] [Indexed: 01/31/2023]
Abstract
Psoriasis, which affects approximately 1–3% of the population worldwide, is a chronic inflammatory skin disorder characterized by epidermal keratinocytes hyperproliferation, abnormal differentiation, and inflammatory infiltration. Decrease in keratinocyte apoptosis is a specific pathogenic phenomenon in psoriasis. Chinese herbs have been used for the treatment of psoriasis in China showing promising effect in clinical trials. A traditional Chinese medicine has relatively fewer side effects with longer remission time and lower recurrence rate. The extract of Rubia cordifolia L. (EA) was previously found by us to induce HaCaT keratinocytes apoptosis. In this study we identified one of the components in Rubia cordifolia L., the anthraquinone precursor 1,4-dihydroxy-2-naphthoic acid (DHNA), induces HaCaT keratinocytes apoptosis through G0/G1 cell cycle arrest. We have also demonstrated that DHNA acts through both caspase-dependent and caspase-independent pathways. Besides, cytotoxicity and IL-1α release assays indicate that DHNA causes less irritation problems than dithranol, which is commonly employed to treat psoriasis in many countries. Since DHNA possesses similar apoptotic effects on keratinocytes as dithranol but causes less irritation, DHNA therefore constitutes a promising alternative agent for treating psoriasis. Our studies also provide an insight on the potential of using EA and DHNA, alternatively, as a safe and effective treatment modality for psoriasis.
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Jean J, Leroy M, Duque-Fernandez A, Bernard G, Soucy J, Pouliot R. Characterization of a psoriatic skin model produced with involved or uninvolved cells. J Tissue Eng Regen Med 2012; 9:789-98. [PMID: 23281213 DOI: 10.1002/term.1666] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2012] [Revised: 09/13/2012] [Accepted: 11/05/2012] [Indexed: 11/07/2022]
Abstract
Current knowledge suggests that uninvolved psoriatic skin could demonstrate characteristics associated with both normal and involved psoriatic skins. However, the triggering factor allowing the conversion of uninvolved skin into a psoriatic plaque is not fully understood. To counter this lack of information, we decided to develop pathological skin substitutes produced with uninvolved psoriatic cells, in order to better characterize the uninvolved psoriatic skin. Substitutes were produced using the self-assembly approach. Macroscopic, immunohistochemical, permeability and physicochemical results showed that involved substitutes had a thicker epidermis, higher cell proliferation, abnormal cell differentiation and a more permeable and disorganized stratum corneum compared with normal substitutes. Various results were observed using uninvolved cells, leading to two proposed profiles: profile 1 was suggested for uninvolved skin substitutes mimicking the results obtained with normal skin substitutes; and profile 2 was dedicated to those mimicking involved skin substitutes in all aspects that were analysed. In summary, uninvolved substitutes of profile 1 had a thin, well-organized epidermis with normal cell proliferation and differentiation, such as observed with normal substitutes, while uninvolved substitutes of profile 2 showed an inverse trend, i.e. a thicker epidermis, higher cell proliferation, abnormal cell differentiation and a more disorganized and more permeable stratum corneum, such as seen with involved substitutes. The results suggest that uninvolved substitutes could demonstrate characteristics associated with both normal or involved psoriatic skins.
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Affiliation(s)
- Jessica Jean
- Laboratoire d'Organogénèse Expérimentale, Centre de Recherche FRSQ du CHU de Québec, Canada.,Faculté de Pharmacie, Université Laval, Québec, Canada
| | - Marie Leroy
- Laboratoire d'Organogénèse Expérimentale, Centre de Recherche FRSQ du CHU de Québec, Canada.,Laboratoire d'Ingénierie de Surface (LIS), Département de Génie des Mines, de la Métallurgie et des Matériaux, Centre de Recherche sur les Matériaux Avancés, Université Laval, Québec, Canada
| | - Alexandra Duque-Fernandez
- Laboratoire d'Organogénèse Expérimentale, Centre de Recherche FRSQ du CHU de Québec, Canada.,Faculté de Pharmacie, Université Laval, Québec, Canada
| | - Geneviève Bernard
- Laboratoire d'Organogénèse Expérimentale, Centre de Recherche FRSQ du CHU de Québec, Canada
| | - Jacques Soucy
- Département de Dermatologie, Hôpital de l'Enfant-Jésus, Québec, Canada
| | - Roxane Pouliot
- Laboratoire d'Organogénèse Expérimentale, Centre de Recherche FRSQ du CHU de Québec, Canada.,Faculté de Pharmacie, Université Laval, Québec, Canada
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Körver JEM, van Duijnhoven MWFM, Pasch MC, van Erp PEJ, van de Kerkhof PCM. Assessment of epidermal subpopulations and proliferation in healthy skin, symptomless and lesional skin of spreading psoriasis. Br J Dermatol 2007; 155:688-94. [PMID: 16965416 DOI: 10.1111/j.1365-2133.2006.07403.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND The margin zone in spreading psoriatic lesions has frequently been used as a model to study the changes in epidermal proliferation, keratinization and inflammation during the transition from symptomless to lesional skin. However, the dynamics of the changes in the epidermal subpopulations-basal cells, transit amplifying cells and differentiated cells-have not been studied in the transition between symptomless and lesional skin. OBJECTIVES To quantify in a dynamic model of the margin zone in psoriasis the characteristics of these subpopulations with respect to epidermal proliferation and differentiation. METHODS From seven patients with active psoriasis, biopsies were taken from the distant uninvolved skin, outer margin, inner margin and centre of a spreading psoriatic plaque. Frozen sections were labelled immunofluorescently using direct immunofluorescence for Ki-67 and beta1 integrin and the Zenon labelling technique for keratin 6, 10 and 15. Digital photographs of the stained sections were quantitatively analysed. RESULTS In the distant uninvolved skin the expression of beta1 integrin was decreased and keratin 15 expression was lost. In this area suprabasal cells expressed beta1 integrin and in the outer margin suprabasal cells expressed Ki-67. From the outer to the inner margin of the psoriasis plaque, which coincided with the appearance of the clinical lesion, there was a significant change in the various markers. The patchy expression of keratin 6 in the inner margin became homogeneous in the centre of the psoriasis plaque and here was also coexpression of keratin 6 and keratin 10 in a single cell. CONCLUSIONS The present study provides additional evidence that the distant uninvolved skin has a prepsoriatic phenotype, which is the first step in a psoriatic cascade. The cascade between symptomless and lesional skin comprises first an abnormality in inflammation with involvement of beta1 integrin-dim cells (transit amplifying cells) subsequently eliciting an enlarged germinative compartment with increased recruitment of cycling epidermal cells and focal expression of proliferation-associated keratins, ultimately culminating in a more-or-less homogeneous epidermis with massive recruitment of cycling epidermal cells and proliferation-associated keratinization.
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Affiliation(s)
- J E M Körver
- Department of Dermatology, Radboud University Nijmegen Medical Centre, PO Box 9101, 6500 HB Nijmegen, the Netherlands.
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Nagy N, Bata-Csörgo Z, Kopasz N, Szeg C, Pivarcsi A, Koreck A, Dobozy A, Kemény L, Széll M. The expression of keratinocyte growth factor receptor (FGFR2-IIIb) correlates with the high proliferative rate of HaCaT keratinocytes. Exp Dermatol 2007; 15:596-605. [PMID: 16842598 DOI: 10.1111/j.1600-0625.2006.00450.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Keratinocyte growth factor receptor (KGFR = FGFR2-IIIb) is a tyrosine kinase receptor expressed by keratinocytes, which mediates the effects of fibroblast growth factors (FGF). There are contradictory data in the literature regarding the role of FGFR2-IIIb during the proliferation/differentiation programme of keratinocytes. In this study, we aimed to investigate whether overexpression of FGFR2-IIIb may have a role in the regulation of keratinocyte proliferation. We analysed the expression of FGFR2-IIIb in an in vitro HaCaT model system representing different stages of proliferation and differentiation of keratinocytes. Real-time RT-PCR and Western blot analyses demonstrated a correlation between FGFR2-IIIb mRNA and protein expression and the proportion of cells in S/G2/M phase in synchronized HaCaT keratinocytes and thus with proliferation activity (r = 0.96). After treatment with the antipsoriatic drug, dithranol, FGFR2-IIIb is downregulated dose dependently both at mRNA and protein levels. Moreover, when the rate of proliferation is decreased by the lack of cell attachment to the culturing surface, FGFR2-IIIb mRNA (P = 0.0315) and protein expressions were also reduced (P = 0.0242), while a differentiation marker, keratin 10, mRNA (P = 0.0003) and protein levels (P = 0.001) were increased (r = -0.92). Based on our results we conclude that FGFR2-IIIb expression in HaCaT keratinocytes corresponds with the proliferative activation of the cells and is not related to the differentiation programme.
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Affiliation(s)
- Nikoletta Nagy
- Department of Dermatology and Allergology, University of Szeged, Szeged, Hungary
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Kagen MH, McCormick TS, Cooper KD. Regulatory T cells in psoriasis. ERNST SCHERING RESEARCH FOUNDATION WORKSHOP 2006:193-209. [PMID: 16329653 DOI: 10.1007/3-540-37673-9_12] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Psoriasis is a chronic autoimmune disease in which T lymphocytes are thought to be central in the pathogenesis. Recently, a T cell subset population was identified, whose role is to suppress inflammatory responses triggered by T effector cells. T cells in this new population are referred to as T regulatory cells. We studied their number and activity in psoriatic lesions and found that they are both numerically and functionally deficient in their ability to suppress the abnormally persistent psoriatic immune response. This deficiency may shed more light on the complex pathophysiology of psoriasis.
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Barker CL, McHale MT, Gillies AK, Waller J, Pearce DM, Osborne J, Hutchinson PE, Smith GM, Pringle JH. The Development and Characterization of an In Vitro Model of Psoriasis. J Invest Dermatol 2004; 123:892-901. [PMID: 15482477 DOI: 10.1111/j.0022-202x.2004.23435.x] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In this study, the phenotype of psoriatic keratinocytes and fibroblasts in reconstructed skin models was compared to those constructed from normal cells. Characterization of this model by immunohistochemistry showed that classical markers of keratinocyte differentiation exhibited similar patterns of distribution in the psoriatic models to those derived from normal cells and generally reflected in vivo observations. Some crucial differences, however, were observed between normal and psoriatic models when pro-inflammatory gene expression and keratinocyte proliferation were investigated. Notably, the chemokine receptor CXCR2 was overexpressed in the psoriatic models, and, moreover, was localized to the granular layer of keratinocytes as seen in psoriasis in vivo. Pro-inflammatory genes (tumor necrosis factor alpha [TNF-alpha], interferon gamma [IFN-gamma], and interleukin 8 [IL-8]) were expressed at high levels in the psoriatic models, but were only minimally expressed in the normal models. Models derived from uninvolved psoriatic skin showed the same gene expression profile as those derived from involved skin along with an increased proliferation rate when compared to normal models. These results suggest that psoriatic individuals possess an inherent predisposition to develop the disease phenotype even in the absence of T cells. This study represents a comprehensive characterization of psoriatic human skin reconstructed in vitro, and demonstrates the potential of this model as a valuable tool in drug discovery.
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Széll M, Bata-Csörgo Z, Koreck A, Pivarcsi A, Polyánka H, Szeg C, Gaál M, Dobozy A, Kemény L. Proliferating keratinocytes are putative sources of the psoriasis susceptibility-related EDA+ (extra domain A of fibronectin) oncofetal fibronectin. J Invest Dermatol 2004; 123:537-46. [PMID: 15304094 DOI: 10.1111/j.0022-202x.2004.23224.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The extra domain A of fibronectin (EDA+ oncofetal isoform of fibronectin was recently reported to be overexpressed in psoriatic uninvolved epidermis. It has been proposed that the abnormal presence of EDA+ oncofetal protein at the dermal-epidermal junction in the uninvolved skin may provide the "psoriatic" environment in which keratinocytes are in a preactivated state with regard to mitogenic signals (e.g., T cell lymphokines). To determine the possible sources of cellular fibronectin in the non-lesional psoriatic skin, we aimed to investigate whether keratinocytes could produce the EDA+ oncofetal form of fibronectin. RT-PCR studies revealed that both cultured normal keratinocytes and HaCaT cells express the EDA+ splice variant of fibronectin mRNA, and in HaCaT cells the EDA+/EDA- transcript ratio was elevated compared with normal keratinocytes. Cultured keratinocytes and HaCaT cells showed intracytoplasmic staining with an EDA+ fibronectin-specific antibody and among the positively stained cells many showed mitosis. Using RT-PCR, western blot analysis, and flow cytometry, we showed that in synchronized HaCaT cells the amount of both total fibronectin and its EDA+ isoform change with the proliferation/differentiation state of HaCaT cells and peak in highly proliferating cells. We show that in short-term ex vivo cultures, a small population of EDA+ fibronectin containing cell population appear among psoriatic uninvolved, but not normal epidermal cells. We also demonstrate that cell attachment has a strong influence on the expression of both total and EDA+ fibronectin. Our results suggest that proliferating keratinocytes could be the sources of the psoriasis susceptibility-related EDA+ oncofetal fibronectin in the epidermis.
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Affiliation(s)
- Márta Széll
- Dermatological Research Group of the Hungarian Academy of Sciences and the University of Szeged, 6720 Szeged, Korányi fasor 6, Hungary.
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Vissers WHPM, Arndtz CHM, Muys L, Van Erp PEJ, de Jong EMG, van de Kerkhof PCM. Memory effector (CD45RO+) and cytotoxic (CD8+) T cells appear early in the margin zone of spreading psoriatic lesions in contrast to cells expressing natural killer receptors, which appear late. Br J Dermatol 2004; 150:852-9. [PMID: 15149496 DOI: 10.1111/j.1365-2133.2004.05863.x] [Citation(s) in RCA: 78] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND An influx of immunocytes, increased epidermal proliferation and abnormal keratinization are hallmarks of the psoriatic lesion. T-lymphocyte subsets in particular activated effector memory T cells and natural killer (NK) T cells have been suggested to play an important role in the pathogenesis of psoriasis. OBJECTIVES In the present study we investigated the number of T-cell subsets (CD4, CD8, CD45RO, CD45RA, CD2, CD25), cells expressing NK receptors (CD94 and CD161), the proliferation marker Ki67 and the keratinization marker keratin (K10) across the margin of the spreading psoriatic plaque: distant uninvolved skin, the outer margin (immediately outside the clinical edge), the inner margin (immediately inside the clinical edge) and the central area. PATIENTS AND METHODS Eight patients with active psoriasis vulgaris participated in this study. Biopsies were taken from the spreading psoriatic lesion from the distant uninvolved skin, the outer margin, the inner margin and the central area. Biopsies were processed for immunohistochemical staining. RESULTS In the outer margin CD8+ (cytotoxic T cells) and CD45RO+ (memory effector T cells) T lymphocytes invade the epidermis and in this early stage the activation markers CD2 and CD25 also show a substantial increase. The next phase, from the outer to the inner margin, shows a statistically significant increase of these markers, and especially, the cells expressing NK receptors (CD94 and CD161) show a massive increase together with a significant increase of epidermal proliferation (Ki67) and a decrease of the K10+ epidermal surface. CONCLUSIONS CD8+, CD45RO+, CD2+ and CD25+ T cells have a role in the early phase of the psoriatic process, whereas CD94- and CD161-expressing cells together with epidermal proliferation and keratinization are involved in a later phase.
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Affiliation(s)
- W H P M Vissers
- Department of Dermatology, University Medical Centre St Radboud, PO Box 9101, René Descartes dreef 1, 6500 HB Nijmegen, The Netherlands
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Suomela S, Elomaa O, Asumalahti K, Kariniemi AL, Karvonen SL, Peltonen J, Kere J, Saarialho-Kere U. HCR, a candidate gene for psoriasis, is expressed differently in psoriasis and other hyperproliferative skin disorders and is downregulated by interferon-gamma in keratinocytes. J Invest Dermatol 2004; 121:1360-4. [PMID: 14675183 DOI: 10.1046/j.1523-1747.2003.12642.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We have previously shown that HCR is a good candidate gene for psoriasis based on its location in the PSORS1 locus, predicted secondary structure change of the associated allele, and expression pattern. To understand better the function of HCR, we studied how HCR expression is altered in hyperproliferative skin diseases other than psoriasis and in cancers. We examined also its regulation by different cytokines, growth factors, and antipsoriatic agents using quantitative RT-PCR (TaqMan) analysis and its location by immunostaining of keratinocyte cultures. Compared to psoriasis, HCR protein had a different distribution in chronic dermatitis, pityriasis rubra pilaris, mycosis fungoides, and chronic skin ulcers. In three of six grade III squamous cell carcinomas of the skin, four of four adenocarcinomas of the lung, and two of two ductal breast adenocarcinomas, positive cytoplasmic staining in cancer cells was detected. As in psoriasis, Ki67 did not colocalize with HCR. In cell cultures, HCR staining was detected perinuclearly in the cytoplasm and in the nuclei, suggesting that the protein may have a role in both compartments. A 2-fold downregulation of HCR mRNA expression was observed on stimulation with interferon-gamma. Based on the observations that HCR is detected in cancers of epithelial origin in Ki67-negative areas and that interferon-gamma downregulates its expression, we suggest it to have an antiproliferative function.
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Affiliation(s)
- Sari Suomela
- Department of Dermatology, Helsinki University Central Hospital, Helsinki, Finland
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