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Biomedical subjects

K B Fraser

Publications and source records attributed to K B Fraser.

6 recordsLinked to original sources
PubMed1979

Increased tendency to spontaneous in-vitro lymphocyte transformation in clinically active multiple sclerosis.

Lymphocytes from 8 of 10 patients with clinically active multiple sclerosis (MS) but from only 3 of 18 patients with quiescent MS and 4 of 20 healthy donors transformed spontaneously on in-vitro culture. The transformed cells from all donors had the characteristics of B lymphocytes (surface and intracytoplasmic immunoglobulin and complement receptors) and carried antigens of Epstein-Barr virus. It is suggested that these results are further evidence that immunoregulation in active MS is abnormal.

Antibodies, Viral↗
PubMed1979

The sensitivity of measles virus haemolysin to acetone and the preparation of mono-specific human anti-haemolysin by absorption.

The haemolysin of measles virus, either in the virion or in infected cells, is functionally and antigenically sensitive to acetone. Absorption of human sera with acetone-treated, measles virus-infected cells removes antibodies to all measles virus structural antigens except haemolysin. The antibody titres of absorbed sera give good correlation in HLI, neutralization and fluorescent antibody staining on unfixed infected cells.

Absorption↗
PubMed1979

Measles virus-specific antibodies and immunoglobulin M antiglobulin in sera from multiple sclerosis and rheumatoid arthritis patients.

When rheumatoid factor in rheumatoid arthritis and multiple sclerosis sera was titrated by the fluorescent antibody method on measles virus-infected cells, there was a marked and variable drop in titer on acetone-fixed cells as compared with unfixed cells. This was accounted for by the failure of measles virus hemolysin-inhibiting (HLI) antibody of the immunoglobulin G class to bind to acetone-fixed infected cells. It was shown by staining unfixed and acetone-fixed measles virus-infected cells that rheumatoid factor in most rheumatoid arthritis sera combined with measles virus-specific hemagglutinin-inhibiting and HLI antibodies, whereas rheumatoid factor in multiple sclerosis sera combined only with HLI antibody. Rheumatoid factor of similar specificity was also observed in normal sera and occasionally in rheumatoid arthritis sera. Both rheumatoid arthritis and multiple sclerosis sera showed almost identical increases in average titer above normal of measles virus-specific fluorescent staining immunoglobulin G and HLI antibodies.

Adult↗
PubMed1979

Affinity for measles virus anti-haemolysin of a residual immunoglobulin M in sera of some patients with multiple sclerosis.

HEp2 cells persistently infected with measles virus were treated with trypsin to remove haemagglutinin (HA) and examined unfixed or fixed in acetone by fluorescent antibody methods, comparing those sera specific for structural antigens of the virus. Staining patterns combined with the blocking of specific immunofluorescence indicated that IgG specific for measles virus haemolysin could be recognized in multiple sclerosis (MS) sera and that in some sera from which rheumatoid factor had been removed, a residual IgM (MS-IgM) was absorbed to measles virus-infected cells and showed the same specificity in blocking tests as measles virus anti-haemolysin. MS-IgM could be removed from sera by absorption with latex particles coated with human IgG and would seem to be anti-globulin with preferential affinity for anti-haemolysin.

Acetone↗