PubMed Health⌕ Search

Biomedical subjects

O A Kalinina

Publications and source records attributed to O A Kalinina.

18 recordsLinked to original sources
PubMed2002

[Anti-tuberculous IgE antibodies. I. Immunodominant antigens].

It is widely accepted that protection against tuberculosis is provided by the formation of type 1 immune response, which is characterized by the production of IFN-gamma and IL-2. However, type 2 antimycobacterial immune response is also present: specific IgE antibodies that are IL-4 dependent, are usually found in tuberculosis patients. There is elevated production of type 2 cytokines in some cases. Thus, both types of an immune response can simultaneously develop, probably counteracting with each other. It is unknown which of mycobacterial antigens are capable of inducing a preferential type 2 response. To detect these antigens, the authors studied tuberculosis IgE antibodies in the sera of 500 tuberculosis patients by using the ELISA assay with ultrasonic disintegrated M. Tuberculosis H37Rv (sonicate). Antigens recognized by IgE antibodies were found to be localized in the cell wall of mycobacteria. The IgE-response was specific since the sera did not react with the antigens of atypical mycobacteria and other bacterial species.

Blotting, Western↗
PubMed2002

[Tuberculous IgE antibodies. Part II. Study of its concentrations in different forms of tuberculosis].

Tuberculosis-afflicted lung are infiltrated by two functionally types of lymphocytes, which presumably counteract with each other by producing proinflammatory (type 1) and anti-inflammatory (type 2) cytokines. It is held that irregular sequestration of antigen into different compartments of the lung may lead to preferential activation of T-helper 1 or T-helper 2 lymphocytes. Unlike IgE antibodies, specific tuberculosis IgE antibodies are seen only in tuberculosis infection. The mean values of IgE antibodies in tuberculosis (7.661 +/- 0.849 IU/ml) are significantly greater than those in other pulmonary diseases (1.768 +/- 0.116 IU/ml). Low concentrations of tuberculosis IgE antibodies in persons with a marked hyperergic response to tuberculin (1.808 +/- 0.097 IU/ml) are of importance. Significant concentrations of mycobacterial IgE antibodies are mainly detected in fibrocavernous (14.56 +/- 1.11 IU/ml), infiltrative (10.10 +/- 1.08 IU/ml), peripheral lymph nodal (10.53 +/- 1.09 IU/ml) tuberculosis rather than intrathoracic lymph nodal tuberculosis (4.555 +/- 0.340 IU/ml). There is a particularly considerable increase in specific IgE antibodies in a phase of decay (15.98 +/- 1.64 IU/ml) and infiltration (12.66 +/- 1.08 IU/ml). These groups also show a concurrent rise in tuberculosis IgG antibodies, which nevertheless disagree with the increase of IgE (the correlation coefficient is 0.599).

Humans↗
PubMed2001

Endogenous fragment of hemoglobin, neokyotorphin, as cell growth factor.

It is shown that neokyotorphin (the alpha-globin fragment 137-141) stimulates proliferation of normal cells (murine embryonic fibroblasts, red bone marrow and spleen cells) and tumor cells (murine melanoma and transformed fibroblasts L929) in the absence or in the presence of fetal bovine serum. In contrast to serum deprivation conditions, the ability to potentiate L929 cell growth in the presence of fetal serum is strongly cell density dependent. The peptide also enhances the viability of L929 cells, murine embryonic fibroblasts and of the primary cultures of murine red bone marrow cells and splenocytes under serum-deprivation conditions for at least 72 h. The results of flow cytometry analysis suggest that the effect of neokyotorphin on survival of L929 cells in serum-free culture medium is due to maintenance of cell proliferation in the absence of growth factors. Along with cell cycle progression the peptide induces reversible reduction of L929 cell size.

Animals↗
PubMed2000

Peptides comprising the bulk of rat brain extracts: isolation, amino acid sequences and biological activity.

Chromatographic separation of rat brain extracts followed by automatic Edman sequencing of the major individual components resulted in identification of 61 endogenous peptides derived from known functional proteins (hemoglobin, myelin basic protein, cytochrome-c oxidase, etc.) or unknown precursors. The results are compared with the data obtained earlier for bovine brain. Although the sequences of bovine and rat hemoglobin contain about 20% of amino acid substitutions, the families of structurally related peptides are very similar in both extracts. Several other proteins also give rise to identical or closely related peptide fragments in the two mammalian species. The outlined similarity extends almost exclusively to the most abundant peptides present in the extracts. The minor components show less overlap. Four hemoglobin-derived peptides isolated from rat brain were shown to be biologically active in tumor cells. Eleven are identical to bioactive peptides from other species. Ten structurally overlap with bioactive peptides from other sources. The data obtained show similar biosynthetic pathways of pool components in different species, the resultant peptides being aimed at fulfilling related functions.

Amino Acid Sequence↗
PubMed2000

[The comparative cultural-biochemical and immunochemical identification of laboratory strains of cultured mycobacteria from leprous patient lesions and from soil].

The paper presents the results of studied of cultural biochemical and immunochemical properties of the cultured mycobacteria isolated from patients with leprous lesions of (M.01, M.011) and the soil (M. lufu) in compared to other well-known mycobacteria and between them. M.01, M.011, and M. lufu differ from other representatives of the genus Mycobacterium, but they are close to each other in their cultural biochemical and immunochemical properties, antigenic composition, and protein spectra. The findings are an additional characteristic of the biological properties of M.01, M.011, and M. lufu.

Animals↗
PubMed1998

[Detection of antituberculosis antibodies and antigens by enzyme immunoassay in young and preschool children suffering from tuberculosis].

Antituberculosis antibodies and mycobacterial antigens were detected in 74 young and preschool children suffering from tuberculosis by using enzyme immunoassay (EIA). They were found in 75.7% and 68.9% of children, respectively. The highest levels of antibodies were significantly greater in patients with active disseminated processes than in those with active restrictive processes. There were no great differences in the levels of antigens between the patients having different activities of a tuberculosis process. Follow-up indicated that there was a reduction in the levels of antibodies and antigens at 6-month treatment. The use of enzyme EIA in children ill with tuberculosis may serve an additional criterion for diagnosis of tuberculosis, evaluation of its activity and course.

Antibodies, Bacterial↗
PubMed1998

[Serological and immunochemical properties of carbohydrate-containing fraction from mycobacterium tuberculosis H37Rv].

Using affinity chromatography on concanavalin A (Con A) sepharose CL 6B, a carbohydrate-containing fraction was derived from Mycobacterium tuberculosis H37Rv sonicate. Surprisingly, the main component of Con A fraction was a protein having a molecular weight of a 30-kD range which is generally absent in the Con A-adsorbed fraction from the culture filtrate. ELISA by means of an antimycobacterial monoclonal antibody panel showed that the 30-kD range of Con A fraction contained antigen 85. It is suggested that the derived components antigen 85 are a glycosylated form of the proteins associated with the mycobacterial cell wall. The Con A fraction, antigen 85 (Department of Virology, Pasteur Institute, Brussels, Belgium), and PPD (Batch RT 45, Stattens Seruminstitute, Denmark) were used for ELISA determination of antimycobacterial antibody titers in the sera of 30 patients with pulmonary tuberculosis, 28 patients with nonspecific lung diseases (bronchitis and/or asthma, pneumonia), as well as in the sera of 12 healthy volunteers. The sensitivities were 46.42, 57.34, and 72.33% and the specificities were 36.97, 26.73, and 56.75% for Con A fraction, antigen 85, and PPD, respectively. The authors suggest that serodiagnostic properties of Con A fraction are extremely limited.

Antibodies, Bacterial↗
PubMed1997

[Interaction of Mycobacteria isolated from sarcoidosis patients with antituberculosis antibodies].

In 80% of cases, antituberculosis antibodies from the sera of patients with tuberculosis were ascertained to react in enzyme immunoassay (EIA) with antigens (ultrasound disintegrants (USDs)) of reverse mycobacteria isolated (initially) from patients with sarcoidosis. The USDs of reverse mycobacteria isolated from patients with sarcoidosis reacted in EIA with monoclonal antibodies (MAb) against M. tuberculosis complex antigens (unique and crossover). Both common and distinctive (unique) antigenic determinants were detected via MAb against different mycobacterial types by immunoblotting in the antigenic complexes of M. tuberculosis H37Rv and reverse strains isolated from patients with sarcoidosis.

Animals↗
PubMed1997

[Examining of humoral immunity on mycobacteria antigens in sarcoidosis].

Antibodies to Mycobacterium tuberculosis antigens H37Rv and reverse strains previously isolated from patients with sarcoidosis with granular isolates were determined in 50 patients with sarcoidosis (including 16 patients isolating granular types) and 56 patients with tuberculosis, by using ELISA and immunoblotting. Serum antibodies from patients with sarcoidosis were ascertained to more commonly react in ELISA with the antigen (ultrasound disintegrant (USDs) obtained from reverse mycobacteria isolated (initially) from patients with sarcoidosis (AGS) than with the USD of the M. tuberculosis H37Rv (AGT) and, on the contrary, serum antibodies from patients with tuberculosis more frequently reacted with the M. tuberculosis H37Rv. The spectrum of serum antibodies from patients with sarcoidosis greatly differed at immunoblotting with AGS and AGT. There was most commonly a reaction with the antigenic determinants 79, 27, 30, and 50 kDa to AGS and that of the determinants 17, 35, 32 kDa to AGT.

Adult↗
PubMed1996

[S and R forms of Mycobacterium tuberculosis as a problem of producing cloned and phenotypically competent strains].

The authors suggest that animals and humans carry M. tuberculosis in S form. These mycobacteria are virulent, do not form conglomerates and represent biologically most potent form. The state of R-form M. tuberculosis results from their culturing on artificial culture media which fail to secure compatible conditions for cells. M. tuberculosis S-form is convenient for microbiological and molecular-genetic research. The authors offer a method of biological production of single M. tuberculosis in S form.

Culture Media↗
PubMed1996

[The isolation and characteristics of monoclonal antibodies to Mycobacterium smegmatis and M. kansasii].

Immunization of BALB/c mice with sonicates of M. smegmatis and kansasii and fusion of splenocytes of the immunized mice with cells of syngeneic myeloma P3X63Ag8653 yielded hybrid clones synthetizing antibodies to these antigens. The selection of hybrid clones and analysis of the antibodies specificity were performed at ELISA using the immunization antigens and antigens from other mycobacteria and E. coli. To define immunoglobulin class of the antibodies the authors used antiglobulin sera of class A, M, G. The monoclonal antibodies belonged to IgG. Molecular mass of polypeptides carrying the epitope against which the antibodies were directed was measured at immunoblotting. Two antibodies reacted only with M. smegmatis, 38 and 10 kD proteins. The other 2 cross-reacted with other mycobacteria and were directed against epitopes on polypeptides varying in molecular mass.

Animals↗
PubMed1995

[Principles and methods of immunodiagnosis in tuberculosis].

The paper provides data on the current principles of tuberculosis immunodiagnosis, characterizes agents (antibodies, antigens, recombinant proteins, anti-idiotypes) used for these purposes, describes some difficulties arising in designing antigen and antibody diagnostic kits, presents the results of using various agents for the immunodiagnosis (primarily for serodiagnosis) of tuberculosis, discusses the diagnostic problems of tuberculosis during mass surveys and at tuberculosis hospitals. The results obtained at the Central Research Institute of Tuberculosis are given on the above issues along with references.

Diagnosis, Differential↗
PubMed1995

[Affinity isolation of mycobacterial antigens on monoclonal antibodies].

Affinity chromatography on monoclonal antibodies specific to tuberculous mycobacteria was used to isolate mycobacterial antigens from ultrasonic disintegrate M. tuberculosis H37Rv. Disk-electrophoresis on polyacrylamide gel showed purified antigens to consist of polypeptides with molecular mass 16, 19, 32, 60, 27, 70 and 55 kD. The antigens were tested for enzyme immunoassay of antibodies in the sera from patients with infiltrative pulmonary tuberculosis.

Adolescent↗
PubMed1994

[Humoral immune response in humans and animals infected and immunized with Mycobacteria of the MAIS complex].

Hyperimmunization of mice and rabbits with surface (whole cells) and complex (ultrasound disintegrants) with the MAIS complex Mycobacterium antigens induced a humoral immune response which was largely aimed against cross-reacting than "unique" Mycobacterium antigens. Infection of BALB/c mice and rabbits with M. avium induced a humoral immune response which was chiefly against cross-antigenic Mycobacterium determinants. A series of consecutive immunochemical procedures were used to isolate from M. avium antiserum the antibody reacting with the antigenic determinants 18, 20, 24, 27, 39, 68, 94, kDa. Mab to the antigenic determinant 79 kDa of M. avium, which belong to the IgG class and unreacting with antigens of other Mycobacterium types were obtained. The antibodies isolated from hyperimmune serum and Mabs were used in the competitive EIA to determine antimycobacterial antibodies in man, mice, and rabbits. With Mab, positive results were obtained in 75% of M. avium-infected mice, 63.6% of rabbits and 63.6% of patients with M. avium infection (with 5.0% false positive results in humans). With antiserum, 83.3% of positive results were obtained in mice (with 10.0% of false positive results), 81.8 in rabbits (with 25% of false positive results) and 90.9% in M. avium-infected persons (with 30% of false positive results).

Animals↗
PubMed1993

[Production of purified antigenic drug from Mycobacterium tuberculosis humanus and its use for serodiagnosis of tuberculosis].

A variety of antigenic preparations from whole bacteria M. tuberculosis humanus (H37Rv) and relevant subcellular components have been tested using indirect ELISA for determination of antituberculous antibodies. Cell membranes of mycobacteria and antigens isolated from KCl-extracts of cell membranes in gel Toyopearl HW 55 F demonstrated the highest activity. Fraction 6 usage raised the reaction sensitivity to 83.3% in specificity 86.7%. As indicated by the ELISA, the highest antibodies content under the above antigen introduction was reached in patients with fibrocavernous tuberculosis, the lowest one in focal tuberculosis.

Antibodies, Bacterial↗
PubMed1993

[The determination of mycobacterial antigens found in immune complexes].

By using affine isolation from hyperimmune rabbit sera on homologous mycobacteria humanus (H37Rv) and affine purification on atypical mycobacteria and BCG mycobacteria, the authors obtained a preparation of antituberculous antibodies. These were used in indirect ELISA to detect antigens (after IC dissociation) in tuberculous patients. Out of 70 patients with infiltrative pulmonary tuberculosis, 30 patients with other pulmonary diseases and 30 healthy donors the antigens were found in 77.1% of tuberculous cases and in 6.7% of healthy subjects. The results of the test say in favour of its benefits in practical application. The antigens levels and incidence of positive reaction are higher in patients with destructive tuberculosis and in the bacterial discharge.

Antibodies, Bacterial↗
PubMedDate not supplied

[Specific antisera to mycobacteria].

Antisera to several Mycobacterium species (M. bovis, M. avium, M. kansasii and M. smegmatis), capable of reacting with homologous antigen diluted not below 1:16000 in the ELISA test, have been obtained. These antisera have been found to cross-react with other Mycobacterium species. Specific antisera to M. bovis, M. avium, M. kansasii and M. smegmatis have been obtained by the multiple exhaustion method on Mycobacterium antigens giving the maximum cross reaction and used for the isolation of antibodies to these Mycobacterium species. In ELISA exhausted antisera produce reactions in the dilution 1:500. Antisera (antibodies) to M. bovis react with the determinant of the antigen with a molecular weight of 25-26 kD, antisera (antibodies) to M. kansasii react with the determinant of the antigen with a molecular weight of 72 kD, those to M. smegmatis react with the determinant of the antigen with a molecular weight of 38 kD and those to M. avium, with the determinant of the antigen with a molecular weight of 16-18 kD.

Adsorption↗