Authors:S. Hassi, Z. Sebestyén, H. De Snoo and F. Szafraniec
An arbitrary linear relation (multivalued operator) acting from one Hilbert space to another Hilbert space is shown to be
the sum of a closable operator and a singular relation whose closure is the Cartesian product of closed subspaces. This decomposition
can be seen as an analog of the Lebesgue decomposition of a measure into a regular part and a singular part. The two parts
of a relation are characterized metrically and in terms of Stone’s characteristic projection onto the closure of the linear
Authors:Szabolcs Varbiro, A. Biro, J. Cervenak, L. Cervenak, M. Singh, F. Banhidy, A. Sebestyen, G. Füst and Z. Prohászka
Anti-human Hsp60 autoantibodies — known risk factor of atherosclerosis — were investigated in a mouse model and in samples of healthy subjects: polyreactivity, presence in cord blood samples of healthy newborns and life-long stability were tested. In IgM hybridoma panel from mouse spleens, polyreactivity of anti-Hsp60 autoantibodies was studied. In healthy pregnant women, umbilical vein and maternal blood samples were collected after childbirth, anti-Hsp-60 and -65 IgM and IgG levels were measured. Life-long stability of anti-Hsp-60 levels was studied on healthy patients during 5 years. ELISA was used in all studies. Polyreactivity of IgM clones of newborn mice and lifelong stability of these autoantibodies in healthy adults were established. IgM anti-Hsp60 autoantibodies in cord blood of healthy human infants were present, however, there was no correlation between maternal and cord blood IgM anti-Hsp60 concentrations. It is proposed that presence of anti-Hsp60 autoantibodies — as part of the natural autoantibody repertoire — may be an inherited trait. Level of anti-Hsp60 autoantibodies may be an independent, innate risk factor of atherosclerosis for the adulthood.