Abstract
Thermostable ethanol insoluble antigens (BE antigens) were identified that occur in all human tissues and human dispersed cells, but which are absent from normal human serum. In contradistinction to previously described organ-specific BE antigens, these antigens were referred to as non-organ-specific tissue antigens (NOST). Antisera obtained by immunization of rabbits with BE preparations of human organs had been selected for being devoid of any organ specificity and had been absorbed by BE preparations of pooled human serum. Such antisera could be used as reagents for detection of NOST BE antigens in pathological human sera. Inhibition of enzyme immunoassay proved to be a convenient procedure for these studies. Inhibition of 35% or more was only exceptionally noted in studying sera of normal subjects 20-40 years old, but inhibition exceeding 35% (positive results) was noted in 48% of sera from subjects at the age of 70 years or more. A high incidence of positive results was also encountered in sera of patients with end-stage renal disease (30%), renal graft recipients (18%), and in patients with lymphoma or leukemia (44%), but interestingly enough, no positive tests were noted in patients with lepromatous leprosy.
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