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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    International journal of dermatology 28 (1989), S. 0 
    ISSN: 1365-4632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: : Comparative studies were performed on clinical and laboratory features of four patients with different types of T-cell lymphoma of the skin; adult T-cell leukemia/lymphoma (ATLL), Sézary syndrome, mycosis fungoides, and Ki-1-positive lymphoma. All neoplastic cells studied showed a helper-inducer T-cell phenotype. A Ki-1-positive lymphoma is distinct from other types of cutaneous lymphomas because of unique morphologic and phenotypic features. Clonal proliferation of lymphocytes infected by human T-cell lymphotrophic virus (HTLV)-l distinguishes ATLL from other T-cell lymphomas of the skin, especially in the endemic area of ATLL. From the pathogeneic point of view, ATLL should not be included in a group with mycosis fungoides and Sezary syndrome.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    International journal of dermatology 22 (1983), S. 0 
    ISSN: 1365-4632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cutaneous pathology 5 (1978), S. 0 
    ISSN: 1600-0560
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Two elderly women with seborrheic keratoses on the abdomen are reported on because of the peculiar histologic appearance characterized by prominent acantholysis. Although the basic histologic architecture was a papillomatous acanthoma corresponding to that of seborrheic keratosis the upper portion of the lesions showed extensive acantholytic changes and dyskeratotic cells. Differentiation from seborrheic keratosis with focal acantholytic dyskeratosis, warty dyskeratoma, keratosis senilis and acantholytic squamous cell carcinoma could be made on the basis of clinical as well as histological features. Although the histogenesis is uncertain, it seems logical to propose that this is a rare variant of irritated seborrheic keratosis.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cutaneous pathology 3 (1976), S. 0 
    ISSN: 1600-0560
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Typical pustular lesions of impetigo herpetiformis were examined by electron microscopy. In the upper layers of the epidermis degenerated keratinocytes and neutrophils lay close together and amorphous substances were seen within and outside the keratinocytes. Neutrophiles were not observed within the keratinocytes. The spongiform pustules of Kogoj observed with light microscopy were made up of a large number of neutrophils in a network of degenerated and stretched-out keratinocytes. Amorphous masses of high electron density which seemed to represent highly degenerated keratinocytes were observed among neutrophils.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Clinical and experimental dermatology 3 (1978), S. 0 
    ISSN: 1365-2230
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: A 68-year-old man developed pemphigus foliaceus, myasthenia gravis with a spindle cell thymoma, and later died with red cell aplasia. At autopsy, pemphigus affected the oesophageal mucosa, and this finding was confirmed by direct immunofluorescence.In order to clarify the relationship between pemphigus and myasthenia gravis or thymoma, sera from 38 patients with myasthenia gravis were examined. Intercellular epithelial antibodies (IC-AB) at titres of 10-40 were found in 8, when monkey oesophagus was employed as the substrate. IC-AB in sera of patients with pemphigus and or myasthenia gravis did not react to any part of human thymoma, human hyperplastic thymus or monkey normal thymus. Deposits of immunoglobulins or complement were not demonstrated in the human thymoma.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Australasian journal of dermatology 17 (1976), S. 0 
    ISSN: 1440-0960
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-069X
    Keywords: Chemotaxis ; Dermatophytosis ; Complement activation ; Alternative pathway ; Dermatophyte-derived chemotactic factor ; Subcorneal pustule
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In dermatophytosis, there is exocytosis of polymorphonuclear leukocytes (PMNs) toward the fungus-laden horny layer. To analyze this mechanism, we studied in vitro leukotactic properties of epidermal extracts prepared from lesions of experimental Trichophyton mentagrophytes infection in guinea pigs as well as fungus-derived chemotactic factors. Trichophyton mentagrophytes was found to release low-molecular-weight PMN chemotactic factors with its growth, like other microorganisms. Furthermore, it activated complement via the alternative pathway to produce complement-derived chemotactic factors in vitro. The epidermal extracts prepared from weakly inflammatory lesions of an early stage of T. mentagrophytes infection showed mild PMN chemotactic activity, which, as in those from irritated skin, was mostly due to the presence of low-molecular-weight chemotactic factors. After 8 days of infection, when prominent PMN migration took place together with the development of immune reactivity to fungus antigens, the epidermal extracts revealed strong leukotactic activity that showed a triphasic pattern by Sephadex G-75 chromatography similar to that observed in complement-activated serum. Since we could not demonstrate any deposition of immunoglobulins and complement on the fungal elements present in the horny layer, actual complement activation in vivo seems to occur after interaction of serum with soluble fungal components in the epidermis through both classic and alternative pathways. We think that the transepidermal migration of PMNs in dermatophytosis, together with contact sensitivity to fungal antigens, is responsible for induction of increased epidermopoiesis with resultant desquamation to eliminate the fungus-laden horny layer.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Archives of dermatological research 275 (1983), S. 71-75 
    ISSN: 1432-069X
    Keywords: Anti-stratum corneum autoantibodies ; Immunofluorescence studies ; Psoriasis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Using autologous normal skin and freshly separated sera, the titers of circulating anti-stratum corneum (SC) IgG autoantibodies, which were predominantly demonstrated by ordinary indirectimmuno-fluorescence (IF), and those of complement-fixing anti-SC autoanibodies were compared in 16 proriatic patients with active lesions, 16 patients with nonpsoriatic inflammatory dermatoses, and 11 normal subjects. As in patients with other inflammaroty dermatoses, the titers of IgG anti-SC autoantibodies in psoriatic patients were not specifically higher than in normal controls but were more variable, indicating that their circulating levels are dependent on a delicate balance between consumption at inflammatory sites and a secondary increase due to SC-antigen release following inflammation. The titers of complement-fixing anti-SC autoantibodies were much higher than those of IgG autoantibodies in most cases but they were not particularly high in psoriatic patients. From these findings, we think that if these autoantibodies are really involved in complement activation in inducing the transepidermal leukocyte migration of psoriatic lesions, a local factor of psoriatic epidermis, which may facilitate the permeation of these antibodies toward the SC, plays a more important role than the actual circulating antibody levels.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-069X
    Keywords: Anaphylatoxin ; Chemotaxis ; Chemokinesis ; Psoriasis ; Psoriatic leukotactic factor ; Anaphylatoxin ; Chemotaxis ; Chemokinesis ; Psoriasis ; Psoriatischer leukotaktischer Faktor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Ein leukozytenstimulierender chemotaktischer Faktor mit einem Molekulargewicht von annähernd 12500 Dalton kann reichlich aus Psoriasisschuppen isoliert werden. Mit Ausnahme von komplementaktiviertem Serum zeigte keiner der Extrakte aus Psoriasisschuppen bei der chromatographischen Analyse mit Sephadex G-75 ein dem psoriatischen leukotaktischen Faktor (PLF) ähnliches Elutionsmuster. Experimentell konnte gezeigt werden, daß der PLF stark chemotaktisch und mäßig chemokinetisch auf neutrophile Granulozyten wirkt. Eine weitere Reinigung des PLF erbrachte schließlich eine kationische Peptidfraktion ähnlich dem Anaphylatoxin. Bei intradermaler Injektion von PLF an Meerschweinchen zeigten sich innerhalb von 24 h degenerative epidermale Veränderungen, wobei besonders die differenzierten Zellen der oberen Epidermis betroffen waren. Darüber hinaus wurde die Epidermopoese, gemessen an der 3H-Thymidin-Markierung, beschleunigt. Durch Planimetrie konnte eine deutliche Verdickung der Epidermis nach 5 Tagen gezeitt werden. Da der PLF per se weder die Proliferation isolierter Basalzellen beeinflußte noch eine schädigende Wirkung auf Kulturen menschlicher Epidermiszellen ausübte, kann spekulativ vorgeschlagen werden, daß der PLF die Einwanderung von neutrophilen, mit hydrolytischen Enzymen und toxischen Substanzen beladenen Granulozyten bewirkt, wodurch die Schädigung der oberen Epidermis zustande kommt und daraus eine Parakeratose und akanthose resultiert.
    Notes: Summary A leukocyte chemotactic factor with a molecular weight of around 12,500 daltons is found in large amounts in psoriatic scales. Except for complement-activated serum none of the extracts prepared from individual contaminants found in psoriatic scales showed an elution pattern similar to that of the psoriatic leukotactic factor (PLF) by Sephadex G-75 chromatography. Checkerboard experiments showed that PLF was highly chemotactic and mildly chemokinetic for polymorphonuclear leukocytes (PMNs). Purification of PLF yielded a cationic peptide fraction similar to that of anaphylatoxin. Intradermal injection of a potent PLF solution into guinea pigs produced degenerative changes in the epidermis within 24 h, particularly in the differentiated cells of the upper epidermis. It increased epidermopoiesis as assessed by incorporation of 3H-thymidine. Planimetric analysis of the epidermis revealed a marked increase in epidermal thickness after 5 days. Since PLF per se did not influence the proliferative capabilities of isolated basal cells or exert any damaging effect on differentiated epidermal cells in human epidermal cell culture, we speculated that PLF induced the advent of PMNs abound with hydrolytic enzymes and toxic substances, which were responsible for the damage of the upper epidermis resulting in the formation of parakeratosis and of acanthosis.
    Type of Medium: Electronic Resource
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