Publications by authors named "Lilla Landeck"

Proinflammatory cytokines, such as IL-1β, are important mediators of psoriasis. UBE2L3, an E2 enzyme, is thought to be an indirect target of IL-1β secretion by binding to ubiquitin ligases such as TRIM21. However, its role in psoriasis remains unknown.

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Background: The Isoleucyl-tRNA synthetase (IARS) catalyzes isoleucine to the corresponding tRNA, maintaining the accuracy of gene translation. Its role in psoriasis has been not investigated so far. In this study, we aimed to investigate the mechanisms underlying the efficacy of IARS inhibitor, mupirocin, treatment for psoriasis.

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Objectives: Psoriasis is an immune-mediated skin disease dominated by the cutaneous immune system. Keratinocytes have been considered important triggers that initiate psoriasis. The key molecules and events of keratinocytes that link the innate immune system in psoriasis must be investigated in more detail.

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Introduction: Dimethyl fumarate (DMF) is an oral compound to treat plaque psoriasis. Data on the treatment of patients with psoriasis affecting impactful areas are scarce. In this interim analysis of the prospective, noninterventional SKILL study, we summarized results of DMF treatment regarding effectiveness (overall and in impactful areas) and safety.

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Over the past two decades, significant progress has been achieved in the treatment of psoriasis by targeting the human cytokine network. At present, 11 biologicals - antibodies, and a soluble receptor - are used to neutralize key inflammatory cytokines. Based on their targets, they can be grouped into the following four classes: TNF-α-, IL-12/23-, IL-17- and IL-23-inhibitors.

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Article Synopsis
  • Psoriasis is a chronic inflammatory disease that impacts skin health, highlighting the role of epidermal proteins in skin barrier function and immunity.
  • A study compared epidermal proteins between psoriasis patients and healthy individuals, finding key proteins that were elevated, particularly antimicrobial peptides (AMPs) and antiviral proteins (AVPs), with OAS2 levels correlating to disease severity.
  • OAS2 arises mainly from inflamed skin cells and can potentially serve as a biomarker for psoriasis severity and treatment effectiveness, showing promise for future clinical applications.*
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To investigate the effect of suppressor of fused (Sufu) on epidermal and dermal cellular properties and in wound healing. Transgenic (TG) mice overexpressing human Sufu (hSufu) in the epidermis were applied to investigate the effects of Sufu on epidermal and dermal cellular properties and in wound healing. Histological staining revealed a reduction of epidermal and dermal thickness and an increase of hypodermal adipose tissue in homozygous K14-hSufu TG mice when compared with wild-type (WT) controls.

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Objectives: Sprouty (SPRY) 1 is one of the SPRY proteins that inhibits signalling from various growth factors pathways and has also been known as a tumour suppressor in various malignancies. However, no study elucidates the role of SPRY1 in the skin. Our study was conducted to determine the function of SPRY1 in human keratinocytes and the epidermis.

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Fumarates (fumaric acid esters, FAEs) are orally administered systemic agents used for the treatment of psoriasis and multiple sclerosis. In 1994, a proprietary combination of FAEs was licensed for psoriasis by the German Drug Administration for use within Germany. Since then, fumarates have been established as one of the most commonly used treatments for moderate-to-severe psoriasis in Germany and other countries.

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Rottlerin is a natural polyphenolic compound that was initially indicated as a PKCδ inhibitor. However, it was recently revealed that it may target a number of molecules and have biological effects on various cell types and is considered as a possible agent for tumor and cell proliferative diseases. Psoriasis is a chronic inflammatory cutaneous disorder with undefined etiology and is characterized by abnormal cellular proliferation, angiogenesis, and inflammation.

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Keratin 24 (K24) is a new kind of keratin genes, which encodes a novel keratin protein, K24 that bears high similarity to the type I keratins and displays a unique expression profile. However, the role of K24 is incompletely understood. In our study, we investigated the localization of K24 within the epidermis and possible functions.

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Dermal fibrosis is characterized by the activation of the matrix-producing 'positive' myofibroblasts, and the relentless production and deposition of extracellular matrix. The hedgehog pathway has recently been demonstrated to work in a pro-fibrotic manner in systemic sclerosis (SSc). A negative regulator of the hedgehog pathway (Hh), the suppressor of fused (Sufu), was shown to be involved in the activation of fibrotic diseases.

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Background/purpose: Urocanic acid (UCA) absorbs ultraviolet (UV)B radiation in the epidermis which may interfere with phototherapy. Therefore, the influence of individual levels of UCA on immune reactivity and vitamin D synthesis induced by narrowband UVB radiation was assessed.

Methods: Twenty-eight subjects with irritant contact dermatitis of the hands were irradiated with suberythemal doses of narrowband UVB radiation on their unaffected lower forearms on three consecutive days.

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Biomarkers are of increasingly high importance in medicine, particularly in the realm of 'personalized medicine'. They are valuable for predicting prognosis and dose selection. Moreover, they may be helpful in detecting therapeutic and adverse responses and in patient stratification based on efficacy or safety prediction.

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Several types of collaboration are being pursued to identify, validate and apply new biomarkers. Here, we highlight examples of such initiatives and discuss the challenges, approaches to address these challenges and key factors for success.

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Psoriasis is similar to endpoints of epithelial-mesenchymal transition (EMT), a process of epithelial cells transformed into fibroblast-like cells. The molecular epithelial and mesenchymal markers were analysed in psoriatic keratinocytes. No obvious alteration of epithelial markers E-cadherin (E-cad), keratin 10 (K10), K14 and K16 was detected in psoriatic keratinocytes.

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Due to their potential mutagenic, carcinogenic and teratogenic effects occupational exposure to chemotherapy drugs should be kept to a minimum. Utilization of personnel protective devices, especially the use of protective medical gloves, is a mainstay to avoid skin contact. The choice of appropriate gloves is of outstanding importance.

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Background: The thinness of the periorbital skin may facilitate allergen penetration, making this area particularly susceptible to sensitization.

Material And Methods: For the cross-sectional study, data were collected by the 57 participating centres of the Information Network of Departments of Dermatology. A total of 101 403 patients patch tested between January 2001 and December 2010 were included.

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Background: Allergic contact dermatitis is a leading cause of periorbital dermatitis. The extremely thin nature of the periorbital skin may facilitate allergen penetration, making this area particularly susceptible to allergic contact sensitisation. In this study, we assessed sensitisation rates to ingredients of common topical ophthalmic agents.

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Recently, we described a case of generalized pure cutaneous Rosai-Dorfman disease in a 43-year-old Asian man in JAMA. The lesions distributed on nearly all of the skin of the whole body, except for mucous sites. Molecular, immunophenotypic, and sequencing analyses seem to define it as a histiocytic-mesenchymal transition and intermediate proliferative histiocytosis not associated with mtDNA large deletion and pathogenic mutation, as well as the SLC29A3 gene mutation.

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Background: Loss-of-function mutations in the filaggrin gene (FLG) have been associated with reduced skin barrier function, possibly allowing increased penetration of irritants and allergens.

Objectives: To study whether FLG loss-of-function mutation carriers show different rates of sensitization to common type I and IV allergens among patients referred for occupational contact dermatitis of the hands.

Materials And Methods: Four hundred and ninety-six Caucasian patients were genotyped for four FLG null mutations and patch tested with the European baseline series.

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Background: Loss-of-function mutations in the filaggrin gene (FLG) have been reported to be associated with specific phenotypic characteristics such as hyperlinearity and keratosis pilaris.

Objectives: To study phenotypic features in patients with occupational irritant contact eczema of the hands in relation to FLG loss-of-function mutations.

Materials And Methods: In a prospective cohort study, genotype was determined for 459 study subjects for four FLG null alleles, and investigated for selected history, clinical and laboratory features.

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Psoriasis is a chronic proliferative skin disease and is usually treated with topical glucocorticoids, which act through the glucocorticoid receptor (GR), a component of the physiological systems essential for immune responses, differentiation, and homeostasis. To investigate the possible role of GR in the pathogenesis of psoriasis, normal and psoriatic lesional skin were recruited. Firstly, the immunolocalization of GR in the skin and cultured epidermal keratinocytes were determined by immunofluorescence.

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Psoriasis, a common inflammatory skin disease, is characterized by epidermal hyperplasia, abnormal differentiation, angiogenesis, immune activation, and inflammation. Involucrin is an early terminal differentiation marker of epidermal keratinocytes. In this study, we determined the immunolocalization of involucrin in psoriatic lesions and normal skin of individuals without psoriasis by means of immunofluorescence (IF) assay.

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