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Biomedical subjects

J Bazex

Publications and source records attributed to J Bazex.

At least 127 records · Page 7Linked to original sources
PubMed1995

Measurement of actinic erythema in healthy subjects and in subjects with polymorphous light eruption using a tristimulus colorimeter.

BACKGROUND: The assessment of actinic erythema using a tristimulus colorimeter has only been reported from healthy volunteers but never from subjects with photodermatosis. OBJECTIVE: The aim of this study was to analyse the difference of chromometric measurements in patients with polymorphous light eruption versus healthy subjects. METHODS: Seventy-two subjects were subdivided according to two criteria: skin colour and clinical state. Measurements were done on a non-irradiated site and at the clinical minimal erythema dose site in the L*, a* and b* modes. RESULTS: The data submitted to two-way analysis of variance demonstrate the influence of skin colour and clinical state on the above parameters. CONCLUSION: Chromometric measurements of L* help to differentiate skin colour, whereas those of a* enable the discrimination of healthy subjects from those with photodermatosis.

Adult↗
PubMed1995

[Immunoglobulin G subclass distribution of anti-intercellular substance antibodies in pemphigus].

INTRODUCTION: The purpose of this study was to analyze the IgG subclass distribution of pemphigus anti-epithelial cell surface (ECS) antibodies and to determine whether it differs according to clinical features. MATERIALS AND METHODS: 25 skin biopsies and 16 serum samples, obtained from 27 cases of pemphigus, were analyzed by direct and indirect IF staining, with mice anti-human IgG subclasses monoclonal antibodies. RESULTS: IgG1 deposits were observed in 21 of 25, IgG2 in 2, IgG3 in 0, and IgG4 in the 25 biopsies. IgG1 anti-ECS anti-ECS antibodies were detected in all 16 sera, IgG2 in 1, IgG3 in 1, and IgG4 in 15 sera. The anti-ECS IgG subclass distribution does not differ according to the clinical parameters studied. DISCUSSION: The isotypic restriction to IgG1 and IgG4 subclasses, observed in this study, is similar to previously reported results. The heterogenous distribution and the small number of the studied samples did not allow to put in evidence a correlation with the clinical parameters.

Autoantibodies↗
PubMed1994

Neutrophilic dermatosis: a case of overlapping syndrome with monoclonal antineutrophil cytoplasmic autoantibody activity.

A 66-year-old male patient presented, over a 10-year period, polymorphic cutaneous manifestations with extensive neutrophilic infiltration which supports the diagnosis of overlapping syndrome of neutrophilic dermatoses. This was associated with a benign monoclonal gammopathy of IgA lambda type that had antineutrophil cytoplasmic autoantibody (ANCA) activity. Neutrophilic dermatoses may be associated with or can trigger ANCA.

Aged↗
PubMed1994

[Multicenter histiocytosis].

INTRODUCTION: Multicentric histiocytosis is a rare systemic disease with active episodes and prolonged periods of remission. Immunosuppressor treatment (alkylating agents) can be effective. CASE REPORT: A new case of multicentric histiocytosis was observed in a 38-year-old man who was successfully treated with cyclophosphamide at the dose of 100 mg/d. Treatment was withdrawn after several weeks due to drug-induced hepatitis and replaced with chlorambucil at the dose of 0.1 mg/kg/day for 6 months. No relapse has occurred after a follow-up of 14 months. DISCUSSION: This case is particularly interesting because of the exceptional nature of spontaneous haemarthrosis which was the inaugural sign of joint manifestations with mediastinal lymph nodes and initially isolated pruritus occurring before the typical skin manifestations. Different management protocols have been discussed with emphasis on the presence of acute cyclophosphamide induced hepatitis. This immunosuppressor is not usually hepatotoxic. CONCLUSION: This case demonstrates the systemic nature of the disease and emphasizes the beneficial effect of alkylating agents.

Adult↗