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B Bhogal

Publications and source records attributed to B Bhogal.

At least 37 records · Page 2Linked to original sources
PubMed1987

Linear IgA bullous dermatosis of adults and children: an immunoelectron microscopic study.

The ultrastructural localization of the IgA deposits in the skin of 15 patients with linear IgA bullous dermatosis of adults (LAD), 13 with chronic bullous dermatosis of childhood (CBDC) and three with childhood cicatricial pemphigoid (CCP) were studied. The site of the antigen was determined using sera from two LAD, 13 CBDC and two CCP patients. In all 31 patients the IgA was located predominantly below the lamina lucida (sublamina densa). Similarly, the indirect immunoelectron microscopic studies demonstrated the antigen to be present at the same site, below the lamina densa. This suggests that in linear IgA bullous dermatosis the antibody reacts with the antigen in the sublamina densa region of the basement membrane zone.

Adolescent↗
PubMed1987

Localization of bullous pemphigoid antibody--an indirect immunofluorescence study of 228 cases using a split-skin technique.

We have re-examined the site of deposition of IgG anti-basement membrane zone antibodies in 228 sera from suspected cases of bullous pemphigoid (BP), using 1.0 M sodium chloride split-skin as substrate for indirect immunofluorescence. Nine sera (4%) produced fluorescence on the floor of the split suggesting sub-basal lamina antibody deposition compatible with a diagnosis of epidermolysis bullosa acquisita (EBA). This ultrastructural localization was confirmed in only three of these nine by immuno-electron microscopy. Clinical details were available on six of these nine cases, and none had clinical features suggesting EBA. We have found the split-skin immunofluorescence technique unhelpful in identifying 'missed' cases of EBA. The prevalence of EBA presenting as BP would appear to be very low indeed in the U.K.

Basement Membrane↗
PubMed1987

The localization of the binding site of circulating IgA antibodies in linear IgA disease of adults, chronic bullous disease of childhood and childhood cicatricial pemphigoid.

Biopsies from suction blisters raised in three normal volunteers were used as substrate in the indirect immunofluorescence technique to determine the binding site of circulating IgA antibodies in serum from three patients with adult linear IgA disease (LAD), nine with chronic bullous disease of childhood (CBDC), three with childhood cicatricial pemphigoid (CCP), and four with bullous pemphigoid (BP). Direct immunofluorescence was done using suction blisters raised in two patients with LAD and one with CCP. The circulating IgA antibodies in LAD and CBDC bound mainly to the roof of the blister but also to the base, and in CCP they bound only to the base of the blister. The circulating IgG antibodies in BP bound to the roof and base of the blister. These results demonstrate that the antigens in the various linear IgA dermatoses are heterogenous and are localized at different sites. The LAD and CBDC antigens are present in the lamina lucida, and the antigen in CCP is associated with the basal lamina.

Adolescent↗
PubMed1987

Use of cultured epithelial cells, including keratinocytes, for the detection of antinuclear antibodies.

The use of cultured human epithelial cells as a substrate for the detection of antinuclear antibodies (ANAs) improves the sensitivity of detection above the standard substrates used. Standard antisera have been screened against a series of epithelial cell lines, including keratinocytes. Selected cells have then been used to detect ANAs in 78 patients with discoid lupus erythematosus.

Antibodies, Antinuclear↗
PubMed1986

The significance of an IgM band at the dermo-epidermal junction.

We studied 190 patients with an IgM band at the dermo-epidermal junction demonstrated by direct immunofluorescence. In 55% of patients the final diagnosis was lupus erythematosus, 49% discoid lupus erythematosus, and 6% systemic lupus erythematosus. In 45% of patients the presence of an IgM band was associated with a number of other diagnoses. The finding of an IgM band at the dermo-epidermal junction in a cutaneous biopsy is not sufficient evidence to make a diagnosis of lupus erythematosus without supporting clinical, histological and serological evidence.

Biopsy↗
PubMed1985

Familial primary cutaneous amyloidosis.

Primary cutaneous amyloidosis is uncommon in Europeans. A British family is described in which an extremely rare variant was inherited as an autosomal dominant. The subtlety of physical signs in this family contrasted with the severity of the associated pruritus. Transepidermal elimination of amyloid was a characteristic histological feature.

Adolescent↗
PubMed1983

Immunohistochemical studies of amyloid P component distribution in normal human skin.

The distribution of amyloid P component (AP) in normal human skin was investigated by a light and electron microscopic immunoperoxidase technique, using antibodies to serum amyloid P component (SAP). AP, or an immunologically cross-reactive protein, was found to be specifically localized to the microfibrils of papillary oxytalan fibers and to the peripheral microfibrillar mantle surrounding the elastin core of mature elastic fibers in the reticular dermis; collagen fibers were not stained with anti-SAP. AP was not detected in the dermal-epidermal basement membrane or in the basement membranes surrounding dermal papillary blood vessels and eccrine structures. These findings, which establish the detailed distribution of normal tissue AP in the skin, provide a basis for further studies of the function and behavior of this protein in health and disease.

Amyloid↗
PubMed1983

An immunoelectron microscopy study of the relationship between herpes gestationis and polymorphic eruption of pregnancy.

Five patients with typical bullous herpes gestationis and five patients with polymorphic eruption of pregnancy were studied. Shave biopsies were taken from both involved and uninvolved skin and examined by routine immunofluorescence. They were also examined by immunoelectron microscopy employing a multistep peroxidase-antiperoxidase technique which has been shown to be more sensitive than immunofluorescence. Despite the increased sensitivity of immunoelectron microscopy all cases of polymorphic eruption of pregnancy were completely negative. Although there is a considerable clinical and histopathological overlap between herpes gestationis and polymorphic eruption of pregnancy our findings indicate that these conditions are pathogenetically distinct and should be classified as separate disorders.

Female↗
PubMed1983

Urticaria and vasculitis: a continuum of histological and immunopathological changes.

Histopathological criteria were used to classify twenty-four patients with chronic urticaria into three groups, which were then studied to establish whether circulating immune complexes (CICs), complement activation and deposition of immunoreactants are confined to patients with urticarial vasculitis. Group I (three patients) had classical urticarial vasculitis, and two of these patients showed hypocomplementaemia with evidence of C3 conversion and deposition of immunoreactants in lesional and uninvolved skin. Ten patients (group 2) with a dense perivascular mixed-cellular infiltrate had normal or raised complement levels and infrequent evidence of C3 conversion. Immunoreactants were detected only in their lesional skin. Eleven patients (group 3) had only a sparse perivascular infiltrate. In this group, complement was normal and immunofluorescence was essentially negative. Cryoglobulins were detected in group I patients only. Monoclonal rheumatoid factor and C1q binding were positive in all group I patients, half the group 2 patients and none of the group 3 patients. This study suggests that urticaria and urticarial vasculitis form a disease continuum, and identifies a group of patients with features intermediate between urticarial vasculitis and ordinary urticaria.

Adult↗
PubMed1983

Immunohistochemical studies of amyloid P component and fibronectin in erythropoietic protoporphyria.

Immunofluorescence staining of exposed skin from patients with erythropoietic protoporphyria (EPP) with antibodies to serum amyloid P component (SAP) and to fibronectin produced striking fluorescence of abnormal vascular structures in the upper dermis. An appearance of linear fluorescence along the dermo-epidermal junction with anti-SAP was the result of confluent staining of papillary oxytalan fibres. Amyloid P component (AP) was localized in ultrastructural immunoperoxidase studies to the peripheral (abluminal) regions of thickened dermal vessel walls, the site of maximum concentration of an amorphous matrix containing microfibrillar structures; antibodies to SAP did not bind to leaflets of the reduplicated vascular basal lamina. The characteristic thickening and reduplication of blood vessel walls seen with the electron microscope in EPP therefore involves increased local deposition of both AP and fibronectin.

Amyloid↗
PubMed1983

Clues to the aetiology and pathogenesis of herpes gestationis.

In a study of twenty-five patients with herpes gestationis we found that 80% possessed the HLA antigen DR3, which confers increased immune responsiveness and a predisposition to 'auto-immune disease'. In five patients the development of herpes gestationis coincided with a change in sexual partner, suggesting that the development of herpes gestationis may depend on exposure to an antigen derived from the father. This might share determinants with a component of the basement membrane zone of skin. Although anti-basement membrane zone antibodies are present in HG it is not clear whether they play a pathogenic role. The infrequency of neonatal involvement and the lack of correlation between immunofluorescence findings and clinical activity in our patients suggested that the antibodies might be a result of tissue damage rather than its cause. Two patients in our study were exceptional in that episodes of herpes gestationis were followed by normal pregnancies. In these patients the relationship of their DR antigens to those of the fetus may have been important in determining whether or not the pregnancy would be affected by herpes gestationis.

Child↗