Development of sera reference panels for quality control of ELISA diagnostic kits in Russia

The clinico-immunological examination of 57 patients with chronic bacterial prostatitis was carried out. The clinical analysis made it possible to divide the patients into 3 groups characterized by the presence of chronic inflammatory diseases of other organs which had appeared before (group 1) or after (group 2) the manifestation of the symptoms of prostatitis, aw well as by the absence of concomitant inflammatory diseases (group 3). At the same time these patients were found to have changes in their immune status, most pronounced in patients of groups 1 and 2. The clinico-immunological analysis of the patients with chronic bacterial prostatitis revealed the fact that chronic bacterial prostatitis was a chronic inflammatory process linked with changes in the immune system; these changes had the signs of secondary immunodeficiency and required immunocorrective therapy.     

Kinetic investigation of cooperativity in coenzyme binding by transketolase active sites

The two-step mechanism of coenzyme (thiamine diphosphate, ThDP) binding with two initially identical active sites of apotransketolase has been examined with a kinetic model. Cooperativity between sites in the primary ThDP binding and in the following conformational transition has been analyzed. The only reliable difference between sites is shown to be the tenfold difference in the backward rate constants of the conformational transition; this means that the cooperative interaction between sites takes place only after termination of both steps of ThDP binding in both sites.     

An evaluation of the prognostic significance of antigen CD95(Fas/APO-1) expression on the cells of patients with a myelodysplastic syndrome, acute myeloid leukemia and chronic myeloleukemia

AIM: The expression of CD95(Fas/APO-1) antigen was studied on bone marrow cells of 19 MDS patients, peripheral blood blast cells of 15 acute myeloid leukemia (AML) patients, blast cells and granulocytes of 68 patients with chronic myeloid leukemia (CML)--24 in chronic, 9 in accelerated phase and 35 in blastic crisis (BC)--by indirect surface immunofluorescence assay using flow cytometry (FACScan, Becton Dickinson, USA). RESULTS: CD95(Fas/APO-1) antigen was revealed on bone marrow cells of 8 out of 19 (36.8%) MDS patients; the percentage of antigen-positive cells was 38.1 +/- 19.2%; on 45.5 +/- 22.8% of cells in 6(45%) of 15 AML patients. Fas/APO-1 antigen was totally absent in CML chronic stage; its expression was found in 34% (12 of 35) of our patients with CML BC on peripheral blood blasts and in 56% (5 of 9) on peripheral blast cells of CML patients in acceleration phase. CONCLUSION: The data on overall survival of CD95-positive MDS patients suggest that the presence of Fas antigen is a favorable prognostic sign for patients with MDS. The patients from CD95-negative group represent a risk group both for survival and AML transformation. In CML BC group the survival does not depend upon Fas-antigen expression.     

Formalin-induced chemiluminescence in model protein-lipid systems

Mechanisms of formalin--induced luminescence of protein-lipid complexes have been studied. Free radical reactions of lipid oxidation were shown to be necessary for generating luminescence quanta. The luminescence intensity was mostly promoted by fluorescing products formed in the reoxidized system protein-lipid. Formalin-induced flash of luminescence in these systems may evidently serve as an express-method for analysing protein sample contamination with unsaturated lipids.     

Effect of hydroxylamine hydrochloride on the bacterium Shigella dysenteriae 1 and antigens isolated from them

A study was made into the functional status of hypophysis, adrenal cortex, ovaries, and thyroid gland in patients with kraurosis and leukoplakia vulvae. The above patients demonstrated profound disturbances in the system hypophysis-ovaries, that attest to the need for applying corrective therapies to treat the disturbed hormonal homeostasis.