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Biomedical subjects

C Nieboer

Publications and source records attributed to C Nieboer.

60 records · Page 4Linked to original sources
PubMed1980

IgE in the serum and on mast cells in bullous pemphigoid.

In 25 patients with bullous pemphigoid, the presence of IgE on the epidermal basement membrane (BM) and the cell membrane of mast cells was investigated by immunofluorescence microscopy. In four cases, a linear staining of the BM was found. Strongly positive fluorescence of the mast cells was found in seven cases; in seven others there was weakly positive staining. The positive staining of mast cells seemed to be related to the serum IgE level. The IgE levels in the serum samples of 30 patients were determined by the immunoradiometric assay. In 11 cases, elevated levels (greater than 400 IU/mL) were found. Circulating IgE anti-BM antibodies could be demonstrated in one of 15 serum samples by indirect immunofluorescence. Our results do not indicate that IgE-mediated mechanisms play an important role in the pathogenesis of bullous pemphigoid.

Antibodies, Anti-Idiotypic↗
PubMed1979

Direct immunofluorescence studies in granuloma annulare, necrobiosis lipoidica and granulomatosis disciformis Miescher.

Direct immunofluorescence studies in granuloma annulare, necrobiosis lipoidica and granulomatosis disciformis Miescher are reported. In all 29 cases fibrillar deposits of fibrin in the necrobiotic areas have been found. Complement, mainly C3, was present in the region of the dermo-epidermal junction in 83% of the cases. Although the walls of the vessels in the superficial layers of the dermis showed a positive staining with antifibrinogen and complement, those around the necrobiotic areas were negative in most of the cases. The possible significance of these findings for the pathogenesis has been discussed.

Complement System Proteins↗
PubMed1978

Immunofluorescence studies in granuloma eosinophilicum faciale.

Direct immunofluorescence investigations were performed on skin biopsies from five patients with granuloma eosinophilicum faciale (GEF; facial granuloma). An extensive and brilliant granular picture was observed along the basement membrane (BM) of the epidermis and the hair follicles, in the walls of the vessels, in the cellular infiltrates and on the connective tissue fibers. These granules were positively stained by antisera directed against IgG, complement (C3/4) and, although less consistently, against IgA and IgM. IgE was found in one case along the BM, but anti- IgD was negative. Concomitantly heavy fibrillar deposits of fibrin were present in the walls of the vessels and in the cellular infiltrates, together with granular depositions along the BM. The analysis of the complement factors showed that C1q, C4, C3, C3c, C3d and C5 were present in the same pattern as C3/4. These results indicate that GEF can be considered as a chronic form of leukoclastic vasculitis mediated by an Arthus-like mechanism, maintained by an unidentified, persistent antigen or by locally produced Ig aggregates.

Basement Membrane↗
PubMed1978

Localized chronic pemphigoid. Report of a case, review of the literature and discussion of the relationship with cicatricial pemphigoid.

A case of a chronic remittant blistering eruption on the left temple in a 62-year-old woman is described. Only after repeated biopsies did direct immunofluorescence (DIF) studies reveal a linear staining of the epidermal basement membrane with anti-IgG, C1q, C4, C3 and C5. In addition, heavy deposits of fibrin were observed. The importance of repeated DIF examination in initially negative cases has been stressed. Localized chronic pemphigoid should be considered as a distinct subform of the pemphigoid syndrome.

Albumins↗
PubMed1975

Cutaneous immunohistochemistry. The direct immunoperioxidase and immunoglobulin-enzyme bridge methods compared with the immunofluorescence method in dermatology.

Two immunohistochemical methods, using the enzyme horseradish peroxidase, the direct immunoperoxidase (DIP) and the immunoglobulin-enzyme bridge (IEB) method were applied on 129 skin specimens of 81 patients with lupus erythematosus, bullous pemphigoid, pemphigus vulgaris and rosacea. These methods were compared with each other and with the immunofluorescence (IF) method. The DIP method was preferred to the IEB method because of the greater contrast between the specific staining and the nonspecific staining of the former. The results obtained with both peroxidase methods were comparable with those of the IF method.

Fluorescent Antibody Technique↗