Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Cicatricial IgA pemphigoid  (1)
  • Dermal papilla cell  (1)
  • Immune deposits, lamina lucida type  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Archives of dermatological research 265 (1979), S. 289-298 
    ISSN: 1432-069X
    Keywords: IgA linear immune deposits ; Dermatitis herpetiformis ; Immune deposits, lamina lucida type ; Immune deposits, dermal type ; IgA-lineare Ablagerungen ; Dermatitis herpetiformis ; immunologische Ablagerungen vom Lamina lucida-Typ ; immunologische Ablagerungen vom dermalen Typ
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In drei Fällen von IgA linear-Dermatosis wurden immunelektronenmikroskopische Untersuchungen durchgeführt. In zwei Fällen waren auch zusätzliche IgG-Ablagerungen in der Basalmembranzone vorhanden. Festgestellt wurde ein unterschiedlicher Charakter der IgA-Ablagerungen; in zwei Fällen waren sie gleichzeitig von dermalem und Lamina lucida-Typ, in einem von ihnen näher den Membranen der Basalzellen lokalisiert, so daß über der Lamina basalis ein elektronendurchsichtiger Raum entstand. Im dritten Fall waren die Ablagerungen (untersucht wurde nur IgG und Complement) ausschließlich von dermalem Typ. Es ist bemerkenswert, daß in einem früheren Fall, der durch Ablagerungen ausschließlich zunächst in der Lamina lucida charakterisiert war, nach 11/2 Jahren eine Ablagerung sowohl in der Lamina lucida als auch in der Lamina basalis sich einstellte, ohne daß das klinische Bild sich geändert hatte. Es ist möglich, daß die Lokalisation der IgA-Ablagerungen in der Basalmembranzone variabel und abhängig von der Evolution der Hautveränderungen ist.
    Notes: Summary The authors investigated three cases of IgA linear dermatosis by immunoelectron microscopy. In two of the cases there were additionally some IgG deposits in the basement membrane zone. The arrangement of the IgA deposits was found to vary. In two cases it was of the dermal and the lamina lucida type at the same time, and in one case it was so close to basal cell membranes as to leave an electronlucent space on the side facing the basal lamina. In the third case, the arrangement (only IgG and complement were studied) was exclusively of the dermal type. In one of the cases the deposits had first, i.e., 11/2 years earlier, been confined to the lamina lucida, whereas now they were also seen below the basal lamina, although the clinical condition of the patient had remained unchanged. It would seem that the localization of IgA deposits in the basement membrane zone may vary, depending on the evolution of the disease.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1432-069X
    Keywords: Immunoelectron microscopy ; Split skin ; LABD antigen ; Cicatricial IgA pemphigoid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The localization of the antigen recognized by IgA basement membrane zone (BMZ) antibodies from patients with linear IgA bullous dermatosis (LABD) has not been established. The aim of our study was to find out the binding sites for IgA-BMZ antibodies in LABD in adults and children and, for comparison, the binding sites for IgA antibodies in IgA cicatricial pemphigoid (IgA-CP). Our series comprised 21 sera from adult LABD, 4 sera from childhood LABD, and 2 sera from IgA-CP. The studies were performed using the sodium chloride split-skin method and indirect immunoelectron microscopy (IEM) with the use of the pre-embedding immunoperoxidase techinique on two substrates: monkey oesophagus and normal human skin. Of the 27 sera, 24 reacted with the epidermis (19 from adult, 4 from childhood LABD and 1 from IgA-CP) and at the electron microscopic level labelled the upper part of the lamina lucida (LL) and/or hemidesmosomes, and 2 reacted with the dermis (1 from typical adult LABD and 1 from IgA-CP) and labelled the sublamina densa (SLD) region. Two sera were negative in IEM. In conclusion, the study indicated that the localization of the antigens is similar in adult and childhood LABD, and in IgA-CP.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 1432-069X
    Keywords: Key words Angiogenesis ; Human hair follicle ; Dermal papilla cell ; VEGF
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Hair follicle vascularization appears to be closely related to the processes involved in hair cycle regulation, in which growth factors, cytokines and other bioactive molecules are involved. In particular, vascular endothelial growth factor (VEGF), essential for angiogenesis and vascular permeability, may be responsible for maintaining proper vasculature around the hair follicle during the anagen growth phase. The aim of our study was to compare the in vitro angiogenic capacity, i.e. the steady-state expression of the VEGF gene, of different cultured cell types derived from normal human hair follicles, corresponding to different follicular compartments. Human dermal papilla cells (DPC), fibrous sheath fibroblasts, dermal fibroblasts, and follicular and interfollicular keratinocytes were cultured and studied in vitro for VEGF expression at the mRNA level using RT-PCR, and for VEGF protein synthesis by radioimmunoprecipitation and immunocytochemistry. In vivo examination for VEGF expression in human terminal hair follicles was performed using immunohistochemical methods. In the present report the expression of four different VEGF molecular isoforms, differing in their angiogenic capacity, are described in different cultured follicular cell types for the first time. Cultured follicular cells strongly expressed mRNA of four VEGF molecular species identified as the 121-, 145-, 165- and 189-amino acid splice variants, the most prominent being the 121-amino acid molecule. DPC, and also other mesenchymal cells such as fibrous sheath fibroblasts and dermal fibroblasts, in vivo and in vitro strongly expressed VEGF mRNA and synthesized a 46-kDa VEGF protein, whereas follicular and interfollicular keratinocytes in vitro expressed lower levels of VEGF mRNA and proteins than mesenchymal cells. As the highest expression of VEGF was found in DPC, we suggest that DPC are mainly responsible for angiogenic processes possibly related to the human hair cycle.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...