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M F Kahn

Publications and source records attributed to M F Kahn.

At least 181 records · Page 10Linked to original sources
PubMed1989

[Methods for determining antinuclear antibodies and their clinical significance].

Antinuclear antibodies are directed against different nuclear antigens such as deoxyribonucleic acid, ribonucleic acid, nucleoproteins, histones and non-histones-antigens. The importance of ANAs in the characterization of different systemic rheumatic diseases, e.g. autoimmune diseases, has been recognized. The most commonly used assay for ANAs is indirect immunofluorescence. Several methods, such as radioimmunoassays, double immunodiffusion in agarose gel, counterimmunoelectrophoresis or immunoblotting, have been developed and serve to identify antibodies of different specificities. This overview describes the clinical importance of ANAs with reference to the methods of detection. The immunologic diagnosis aspect of different autoimmune and collagen diseases is presented.

Antibodies, Antinuclear↗
PubMed1989

[How will rheumatoid arthritis be conquered? A look into the future].

A look into the future.--The author recalls the different pathogenetic stages presumed to be at the root of rheumatoid arthritis, and then reviews the various theoretical and practical routes which may eventually provide a basic radical treatment for a disease that is still too often poorly controlled.

Arthritis, Rheumatoid↗
PubMed1989

Anti-Scl-70 antibodies detected by immunoblotting in progressive systemic sclerosis: specificity and clinical correlations.

One hundred and forty five serum samples from patients with a connective tissue disease and 30 serum samples from healthy blood donors were analysed by immunoblotting. The presence of anti-Scl-70, which seems to discriminate between progressive systemic sclerosis (PSS) and the CREST (calcinosis, Raynaud's phenomenon, esophageal dysmotility, sclerodactyly, telangiectasia) syndrome, was found in 31/64 (48%) patients with PSS, in 6/55 (11%) patients with systemic lupus erythematosus, in 2/26 (8%) patients with mixed connective tissue disease, and in none of 30 healthy blood donors. These data resulted in a specificity of 93% for this antibody in systemic sclerosis. For patients with PSS the duration of disease was significantly shorter in those with anti-Scl-70 antibodies than in those without, whereas the presence of anti-Scl-70 did not correlate with severity of disease. An 82% prevalence of anticentromere antibodies in patients with the CREST variant compared with a 4% prevalence in patients with PSS or with overlap syndrome confirms the high diagnostic value of this autoantibody for the CREST variant of PSS.

Aged↗
PubMed1989

Immunoblotting profiles in 55 systemic lupus erythematosus sera lacking precipitating antibodies to extractable nuclear antigens.

Serum samples from 55 patients with systemic lupus erythematosus (SLE) were selected for the absence of anti-extractable nuclear antigen antibodies after routine immunodiffusion tests. These sera were immunoblotted for anti-Sm and anti-RNP antibodies on a HeLa cell nuclear extract. Ten (18%) were negative and 45 (82%) produced complex patterns: 10 (18%) suggestive of anti-Sm, three (5%) anti-RNP, and 32 (58%) a combination of anti-Sm and anti-RNP antibodies. These data were very similar to those obtained from sera from a control group of 28 SLE sera selected for positivity of anti-Sm and anti-RNP precipitins with the immunodiffusion test. IgM isotype antibodies to the D peptide were significantly more prevalent than IgG isotype antibodies, whereas antibodies to the 68 kD polypeptide were of both IgM and IgG isotypes. Sera with an anti-Sm/RNP immunoblotting pattern stemmed from a group of patients with SLE with a higher titre of anti-dsDNA antibodies. Among clinical symptoms, the incidence of haemolytic anaemia was higher in the group of patients with the anti-Sm immunoblotting profile. Patients with an anti-RNP immunoblotting profile showed a higher incidence of cutaneous symptoms. It is concluded that immunoblotting for anti-Sm or anti-RNP antibody determination is a very sensitive diagnostic tool in patients with SLE.

Adult↗
PubMed1989

[Antinuclear and anticytoplasmic antibodies in 24 cases of dermatomyositis. Value of western blotting].

Antinuclear and anticytoplasmic antibodies were detected, using 4 methods, in 96% of the sera (23/24) from 24 dermato- or polymyositis patients, who were followed in the Rheumatology Department. Immunofluorescent (IF) labeling of Hep-2 cell smears was more sensitive than IF staining of liver sections (72 vs 67%), and the patterns observed were in agreement 20/24 times. Gelose precipitation is even less sensitive (29%), but enables a characterization of the antigens recognized: 3 anti-RNP, 3 anti-J01, 1 anti-PMScl, 1 anti-SSB and 1 anti-Ro; the latter two specificities were associated with a sicca syndrome. Western-blotting was the most informative method because it was highly sensitive (79%) and identified the principle antigen-antibody systems: anti-U1-RNP (33%) and anti-Scl70 (33%), both associated with myositis with an overlap syndrome (p less than 0.02); anti-J01 (25%) associated with various forms of myositis; and, more rarely, anti-SSB and anti-Ro (both 4%) when a sicca syndrome was present. Finally, non-identified specificities were observed in 37% of the cases.

Adolescent↗
PubMed1989

Mixed connective tissue disease after exposure to polyvinyl chloride.

We present 4 patients fulfilling criteria for mixed connective tissue disease (MCTD) with anti-RNP antibodies, who had been previously exposed, in 4 different professions, to polyvinyl chloride. This presentation is clinically and serologically different from the classical polyvinyl chloride disease in which no such antibody can be found. Already observed in patients after cosmetic surgery, MCTD could also be a result of toxic exposure.

Adult↗
PubMed1989

Antiestrogen antibodies, oral contraception and systemic lupus erythematosus.

Oral contraceptives (OC) are suspect to play a role in systemic lupus erythematosus (SLE). It has previously been shown that OC can induce immune reactions in a number of normal women. Antiethinylestradiol antibodies (anti-EE Ab) have been detected with a radioimmunoassay method in 25-30% of healthy OC users. In the present paper, a comparative study of 123 controls and 55 SLE patients, with or without OC use, indicates (1) that in the disease-free group, anti-EE Ab were detected in 30% of OC users, and only in OC users; (2) that in the SLE group, anti-EE Ab were observed in 57% of female OC users, and, surprisingly, in 13% of men also, a finding already reported by other authors.

Adolescent↗
PubMed1989

Distillation.

Explore the source record for details and available documents.

Arthritis, Juvenile↗
PubMed1988

[Rheumatoid polyarthritis. Misleading aspects and its doubles].

The diagnosis of rheumatoid arthritis is easy for typical forms, but is difficult in certain cases. This is especially true at the onset of the disease. In fact, 10 to 15 p. cent of rheumatoid arthritis cases present onsets which are more or less deceptive, either in their mode, or localization. Until now, no valid assistance could be expected from the pathology, serology or even immunogenetics and molecular biology. In forms seen in their active phase, there are a number of diseases, of various causes, which may simulate rheumatoid polyarthritis. It is absolutely necessary to recognize them in order not to embark on an erroneous therapeutic approach.

Adult↗