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  • 1
    ISSN: 1420-908X
    Keywords: Key words: HSP —α-MSH — Merkel cells — UV dermatitis — Contact dermatitis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Objective: To study the immunoneurocrine network in inflammatory dermatoses, we investigated histochemically acute UV and acute contact dermatitis.¶Methods: Antibodies were applied to frozen and paraffin specimens of human skin after irradiation (n = 10), to positive patch tests (n = 10) and controls (n = 10) against: HSP 70, 72, 27, neuronal polypeptides (α-MSH, NSE, bombesin, PGP 9.5, NGF, NGF-R) and intermediate filaments (peripherin, NF 200, CK 19, 20).¶Results: HSPs and α-MSH were upregulated in UV dermatitis in the epidermis compared to contact dermatitis and normal skin. Sunburn cells did not express HSPs or α-MSH in UV dermatitis. Neuronal markers and HSP 27 labeled more nerve fibers in UV than in contact dermatitis, except the increased staining for NGF, NGF-R and α-MSH in nerve fibers in contact dermatitis. In UV dermatitis, 50% of Merkel cells were suprabasal, but in contact dermatitis, basal, rounded and reduced in number.¶Conclusions: Merkel cells, HSPs and markers of neuroinflammation are of different importance in UV and contact dermatitis in vivo.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Der Hautarzt 51 (2000), S. 838-845 
    ISSN: 1432-1173
    Keywords: Schlüsselwörter Penizillinallergie ; Diagnostik ; Spezifisches IgE ; Hauttest ; Nahrungsmittel ; Keywords Penicillin-allergy ; Diagnostic ; Specific IgE ; Skin tests ; Food additives
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract Background and Objective. Penicillin allergy is a common clinical problem. The distinction between penicillin and para-infectious exanthems is difficult. We investigated the reliability of the history, as well as the sensitivity and specificity of skin tests and specific IgE levels. Patients/Methods: 160 patients with a history of penicillin allergy were retrospectivly evaluated in the outpatient department of a dermatological clinic. Results: Nearly 50% were diagnosed as allergic to penicillin by detection of specific IgE or skin test. About 60% of the patients with immediate type reactions, and 72% with maculo-papular erythema showed positive reactions in skin tests. Significantly more patients were diagnosed as allergic to penicillin by intradermal testing than by prick testing (p〈0,05). The sensitivity of the specific IgE RAST was 17,9%; the specifity, 89,5%. For the prick test the sensitivity was 8,2%; the spe-cifity 90,8%. For the intradermal test the sensitivity was 26%; the specifity 69,7%. Conclusions: We suggest a step by step procedure to detect penicillin allergy making the diagnostic results as valid as possible.
    Notes: Zusammenfassung Hintergrund und Fragestellung. Die Penizillinallergie (PA) ist ein häufiges klinisches Problem und ihre Abgrenzung zu parainfektiösen Exanthemen schwierig. Anhand unseres Patientengutes wurden die Wertigkeit der Anamnese und die Sensitivität und Spezifität von Hauttestung und spezifischem IgE untersucht. Patienten/Methodik: Daten zu 160 Patienten aus den Jahren 1993–1998 aus der Ambulanz einer Universitäts-Hautklinik mit anamnestischer Angabe einer PA wurden retrospektiv ausgewertet. Ergebnisse: Bei ca. 50% der Patienten wurde eine PA durch Bestimmung des spezifischen IgE oder durch Hauttestungen diagnostiziert. Von diesen zeigten ca. 60% mit einer Soforttypsymptomatik und 72% mit einem makulopapulösen Exanthem einen positiven Hauttest. Signifikant mehr Patienten reagierten in der Intrakutantestung als im Pricktest (p〈0,05). Die Sensitivität der Bestimmung des spezifischen IgE konnte mit 17,9%, die Spezifität mit 89,5% errechnet werden. Für den Pricktest betrug die Sensitivität 8,2%, die Spezifität 90,8%. Für den Intrakutantest wurde die Sensitivität mit 26% und die Spezifität mit 69,7% errechnet. Schlussfolgerungen: Wir schlagen eine stufenweise Abklärung bei PA vor, um die Aussage der Diagnostik möglichst sicher zu machen.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Experimental dermatology 8 (1999), S. 0 
    ISSN: 1600-0625
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: First, a method of microinjection of antibodies in primary human keratinocytes in culture was established. Second, in acute UV irradiation, the physiological role of heat shock protein (HSP) 72 in keratinocytes was studied with this method. Primary human keratinocytes in culture were injected with “controls” as fluorescent dyes, phosphate buffered saline (PBS), an irrelevant secondary antibody and an antibody against a protein with known protective function in UV erythema, HSP 72. UV irradiation was applied and survival, colony forming and immunohistochemistry for injected and non-injected keratinocytes were evaluated in a time course. Puncturing the plasma membrane with injections of “controls” as FITC, PBS and the IgG anti-mouse antibody did not result in reflux of injected material or any alteration in morphology or colony-forming ability for 24 h. Keratinocytes injected with an mAb to HSP 72 without UV irradiation survived microinjection for up to 12 days, while surprisingly, more than double of injected and irradiated ones died after 12 h compared to not injected and irradiated ones. Moreover, microinjection of the antibody to HSP 72 in the nucleus resulted in a loss of the immunohistochemical labeling for HSP 72 in these cells after 12 h. Microinjection of the “controls” did not harm the survival, forming of colonies and expression of HSP 72 in keratinocytes for 24 h. In contrast, microinjection of an mAb against HSP 72 led to an increase in cell death after UV irradiation, confirming that HSP 72 is important for UV protection. Microinjection of antibodies in human keratinocytes in culture might allow the study of the physiological role of some proteins.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 149 (2003), S. 0 
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: There is a wide variety of topical or surgical treatment options for molluscum contagiosum (MC). However, treatment in young or anxious children is difficult, time-consuming and often painful. We studied the topical efficacy and tolerance of imiquimod, a topical immune-response modifier, which stimulates the production of interferon-αand other cytokines in children with MC. In an open-label, follow-up trial, imiquimod 5% cream was applied three times a week for 16 weeks to 15 children aged 4–11 years with multiple MC. Nine of 13 children (69%) who completed treatment responded. Two patients (15%) showed a complete remission, and seven (54%) had a partial response, with a remarkable reduction of the MC lesions. Four children (31%) showed stable or progressive disease. In three children (23%) with partial remission, the number of mollusca were considerably reduced, thus avoiding surgical treatment. In general, the treatment was well-tolerated, without systemic side-effects. Local side-effects included erythema (85%), itching (75%), burning sensations (23%) and pain (11%). Three children (23%) discontinued treatment because of local side-effects. The results of this study suggest that imiquimod 5% cream is a useful new treatment option for MC in children, especially in severe cases. The dosing schedule and length of treatment requires further evaluation.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    Clinical and experimental dermatology 30 (2005), S. 0 
    ISSN: 1365-2230
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-1963
    Keywords: Schlüsselwörter Desmosomale Cadherine ; Hemidesmosomen ; Basalmembran ; Bullöse Dermatosen ; Goodpasture-Syndrom ; Key words Desmosomal cadherins ; Hemidesmosomes ; Basement membrane ; Blistering skin diseases ; Goodpasture's syndrome
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Cell-cell and cell-matrix adhesion molecules as well as extracellular matrix components are target structures of antibody-mediated autoimmunity that have recently been well characterized at the molecular biological level. Pathogenic autoantibodies against these molecules are causally related to disturbances of cell and tissue adhesion that become apparent as various (muco-)cutaneous blistering diseases. Desmosomal cadherins (desmogleins and desmocollins) mediate epidermal intercellular adhesion. Among these, desmoglein 1 and desmoglein 3 are the autoantigens of pemphigus foliaceus and pemphigus vulgaris, respectively, exhibiting intraepidermal blistering. The pathogenic relevance of autoantibodies against desmocollins (IgA pemphigus) and desmoplakins (paraneoplastic pemphigus) still remains unclear. Hemidesmosomes contain the plaque protein BPAG1 and the partly collagen-like transmembrane protein BPAG2, representing the autoantigens of bullous pemphigoid and pemphigoid gestationis with subepidermal blistering. A certain subtype of cicatricial (benign mucous membrane) pemphigoid is characterized by autoantibodies against laminin 5 present in the subhemidesmosomal anchoring filaments, while epidermolysis bullosa acquisita and bullous SLE exhibit autoantibodies against collagen type VII constituting the anchoring fibrils. In addition, autoantibodies against a particular collagen type IV chain of the glomerular basement membrane are responsible for the manifestation of Goodpasture's syndrome. These recent molecular biological findings might be the basis for the development of novel therapeutic strategies.
    Notes: Zusammenfassung Zell-Zell- und Zell-Matrix-Adhäsionsmoleküle sowie Basalmembranbestandteile sind molekularbiologisch inzwischen sehr gut charakterisierte Zielstrukturen humoraler Autoimmunität. Pathogene Autoantikörper sind dabei kausal mit Adhäsionsstörungen v. a. im Bereich der Epidermis verbunden, die sich als verschiedenartige bullöse Dermatosen manifestieren. In Desmosomen vermitteln desmosomale Cadherine (Desmogleine und Desmocolline) die interzelluläre Adhäsion der epidermalen Keratinozyten. Von diesen sind Desmoglein 1 bzw. Desmoglein 3 die Autoantigene des Pemphigus foliaceus bzw. des Pemphigus vulgaris mit intraepidermaler Blasenbildung. Die pathogene Bedeutung von Autoantikörpern gegen Desmocolline (IgA-Pemphigus) sowie Desmoplakine (paraneoplastischer Pemphigus) ist dagegen unklar. Hemidesmosomen enthalten das Plaqueprotein BPAG1 und das kollagenartige Transmembranprotein BPAG2, die die Autoantigene für das bullöse Pemphigoid und das Pemphigoid gestationis – mit subepidermaler Blasenbildung – darstellen. Eine bestimmte Unterform des vernarbenden (Schleimhaut-)Pemphigoids ist durch Autoantikörper gegen Laminin 5 der subhemidesmosomalen Verankerungsfilamente gekennzeichnet, die Epidermolysis bullosa acquisita und der bullöse SLE durch solche gegen Kollagen VII der Verankerungsfibrillen. Ferner sind Autoantikörper gegen eine Kollagen-IV-Kette der glomerulären Basalmembran für die Manifestation des Goodpasture-Syndroms verantwortlich. Aus diesen molekularbiologischen Erkenntnissen könnten Ansatzpunkte für neue therapeutische Strategien resultieren.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Archives of dermatological research 291 (1999), S. 303-305 
    ISSN: 1432-069X
    Keywords: Key words Langerhans cells ; Sunburn cells ; UV ; erythema ; Apoptosis ; Immunohistochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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