[The response of human lymphocytes to Staphylococcus aureus peptidoglycan in a system of opsonic cooperation]. / Otvet limfotsitov cheloveka na peptidoglikan Staphylococcus aureus v sisteme opsonicheskoi kooperatsii.

Interaction of lymphocytes with S. aureus peptidoglycan treated with normal human serum and its fractions was studied on the basis of luminol-dependent chemiluminescent reaction. Treatment with whole serum led to the considerable increase and acceleration of lymphocytic reactions. The opsonic effect mainly depended on antibodies and complement, the contribution of other opsonins (which could be partially attributed to fibronectin) did not exceed 30%. IgG and fibronectin in concentrations, similar to their concentration in normal human plasma, enhanced the reactions 3.4 +/- 0.3 (p less than 0.05) and 1.5 +/- 0.005 (p greater than 0.05) times, respectively. The problem of the intrapopulation profile of opsonic-lymphocytic reactions and their role in the system of cell-mediated and humoral interactions is discussed.

[The characteristics of Staphylococcus aureus peptidoglycan in the spectrum of the reactivity of human lymphocytes to bacterial peptidoglycans]. / Kharakteristika peptidoglikana Staphylococcus aureus v spektre reaktivnosti limfotsitov cheloveka k bakterial'nym peptidoglikanam.

The sensitivity of lymphocytes of healthy persons to S. aureus peptidoglycan as compared with that to the polyclonal stimulator zymosan C3b and peptidoglycans of other bacteria (Streptococcus faecalis, Escherichia coli, Bacterium bifidum) was analyzed with a test system permitting the determination of specific reactivity to peptidoglycans. The analysis showed that at the peak of luminol-dependent chemiluminescence (25-30 minutes) individual reactivity to S. aureus peptidoglycan varied within wide limits (the coefficient of lymphocyte stimulation was 1.4-9.6, 3.5 +/- 0.6), exceeding sensitivity to other bacteria, as well as the values obtained in the negative control. The conclusion of the wide spread of sensitization to S. aureus peptidoglycan and the possibility of using this preparation for the study of cell-mediated immunity reactions was made.

[Chemiluminescence of human lymphocytes in reactions with Staphylococcus aureus peptidoglycan]. / Khemiliuminestsentsiia limfotsitov cheloveka v reaktsiiakh s peptidoglikanom Staphylococcus aureus.

The capacity of S. aureus peptidoglycan (PG) for inducing the luminol-dependent chemiluminescence of human lymphocytes has been studied. Lymphocytes taken from adult donors have been found to give dose-dependent reaction to S. aureus PG, while lymphocytes from newborn infants have been inert under the same conditions. Essential differences in the kinetics of response to PG (the maximum intensity of chemiluminescence occurs in 25-30 minutes) and to phytohemagglutinin (the maximum intensity is reached in 1 minute) were observed. These results are considered as the manifestation of specific sensitization to bacterial peptidoglycans, which may be rapidly detected by reactive chemiluminescence.

[C3b-mediated chemiluminescence of human lymphocytes]. / C3b-oposredovannaia khemiliuminestsentsiia limfotsitov cheloveka.

Data are presented concerning peculiarities of human lymphocyte luminol-dependent chemiluminescence stimulated with C3b-opsonized and native zymosan. The response was maximal by the 60th min and 4-17 exceeded the results of the negative control. The C3b-opsonization considerably potentiated the lymphocyte activating zymosan's properties and the rate of reaction/maximal level at the 10th min; the effect of phytohemagglutinin reached max by the end of the 1st min in the same tests. The functional significance of the CR- and lectin-mediated structures of lymphocytes is discussed.