PubMed Health⌕ Search

Biomedical subjects

L E Pospelov

Publications and source records attributed to L E Pospelov.

At least 19 recordsLinked to original sources
PubMed2006

[Antimycobacterial activity of a dry birch bark extract on a model of experimental pulmonary tuberculosis].

The study deals with the evaluation of antimycobacterial activity of betulinol, a dry birch bark extract (BBE), on a model of infection caused by Mycobacterium tuberculosis (MBT). It has established the inhibitory action of betulinol on the in vitro and in vivo growth of MBT and its positive effect on reparative processes in the lung, liver, and spleen of tuberculosis-infected mice.

Animals↗
PubMed2006

[Effect of use of bone marrow cells in therapy for experimental tuberculosis].

The authors studied the efficiency of use of bone marrow cells in the treatment of experimental tuberculosis. Bone marrow cell transplantation to H37Rv tuberculosis-infected H37Rv mice was shown to prolong the life span in the animals as compared to untreated animals. Examination of humoral immunity indicated that administration of allogenic bone marrow cells resulted in the nonspecific polyisotypic stimulation of antituberculosis antibodies, which is essential in producing the protective humoral background. A more significant generation of IgG2a antibodies than that of IgG1 antibodies was also found in therapy with bone marrow cells, which pointed to the fact that there was a Th1 response that is obviously protective in tuberculosis. The high level of IgG2a antibodies correlated with the high specific cellular immune response estimated by the delayed hypersensitivity reaction.

Animals↗
PubMed2004

[Genotypic characteristics of Mycobacterium tuberculosis strains from the Republic of Tyva].

To determine the genetic heterogenicity of Mycobacterium tuberculosis isolated from patients with tuberculosis from different districts of the Republic of Tyva, 71 M. tuberculosis strains IS6110 according to the polymorphism of restriction fragment lengths were typed; of them 32 strains were spoligotyped. The study could genetically characterize the groups of M. tuberculosis strains circulating among patients with tuberculosis in the Republic of Tyva. There was a predominance of the W family of mycobacteria (60.56%). The spoligotyping permitted identification of M. tuberculosis with the spoligotype Beijing in the Republic of Tyva. The mycobacteria belonging to this spoligotype were prevalent and accounted for 50% of the strains. The high proportion of strains with the unique spoligotype (25%) that have not earlier been encountered in the international database is a specific feature of the Mycobacterium population from the Republic of Tyva.

Bacterial Typing Techniques↗
PubMed2003

[Examining the distribution of HLA antigens in patients with tuberculosis and healthy individuals in some regions of the Republic of Tyva].

Healthy individuals and patients with pulmonary tuberculosis were typed by HLA antigens A, B, and C. They were all Tyvians and lived in different regions of the Republic of Tyva. Examination was made in 128 and 85 healthy individuals and 62 and 55 patients with pulmonary tuberculosis from the Todzhinsky and Erzinsky districts of the Republic of Tyva, respectively. The healthy populations of the districts in question were found to differ in a number of Class 1 HLA antigens, such as A3, A10, A11, A28, B7, B27, Cw4. In the Todzhinsky district, tuberculosis morbidity rates were also ascertained to be positively associated with the HLA antigen B13 whereas in the Erzinsky district they were associated with the HLA antigen B12. The findings may be used to form tuberculosis-risk groups in the study districts.

Catchment Area, Health↗
PubMed2002

[Comparative clinical, X-ray, and immunogenetic characteristics of respiratory tuberculosis actively detected in risk groups and in individuals turning for medical help].

Clinical, X-ray, and immunogenetic parameters were comparatively assessed in two groups of first identified patients diagnosed at annual fluorographic studies in groups at risk for tuberculosis and in individuals visiting general health care facilities for symptoms of inflammatory bronchopulmonary disease. Great differences were established in the clinical and X-ray manifestations, the course of the disease, and the patients' immunogenetic status in these groups. Tuberculosis in the patients identified on their referral to general health care facilities is characterized by more severe clinical manifestations, a greater spread of inflammatory and destructive changes in the lung, and massive bacterial isolation. There were certain associations of the HLA antigens A2 and A 11 as markers indicative of tuberculosis resistance with the antigens B35 and Cw4 suggestive of predisposition to tuberculosis in patients with chronic bronchitis.

Adult↗
PubMed2002

[Examining the distribution of HLA antigens in patients with tuberculosis and in healthy individuals in the Erza District, Republic of Tyva].

The paper presents the results of typing by HLA classes I and II antigens in 55 patients with tuberculosis and 85 healthy Tyvians in the Erza District. Republic of Tyva. HLA I and II antigens were determined serologically and polymerase chain reaction, respectively. Tyvian patients with pulmonary tuberculosis had HLA B7 antigen more frequently and HLA B12 antigen less frequently than the controls. The findings suggest that pulmonary tuberculosis is associated with HLA-DRB1 14(6) specificity in this district of the Republic of Tyva. These data may be useful in forming groups at risk for pulmonary tuberculosis in the district under study.

Genetic Markers↗
PubMed2000

[Epidemiological and immunogenetic analysis of tuberculosis and diabetes mellitus association].

The prevalence of insulin-dependent diabetes mellitus (IDDM) and noninsulin-dependent diabetes mellitus (NIDDM) among adults in two Moscow okrugs was studied. It was 0.218 and 1.678%, respectively, the latter form being encountered 7.7 times more frequently. Patients with pulmonary tuberculosis followed at tuberculosis control dispensaries (n = 69,012) were found to have diabetes mellitus in 236 cases (120 with IDDM and 116 with NIDDM). The prevalence of IDDM among the tuberculosis control dispensary patients was 1.7%, which was 8 times greater than that in the general population. That of NIDDM was 1.68%, which did not significantly differ from that in the population. Epidemiological analysis showed that there was a highly significant association of tuberculosis with diabetes mellitus in the population. The risk for IDDM was 3.6% in patients and exceeded that in the population while the risk for NIDDM in the population was the same as that in the population. Analyzing the distribution of immunogenetic HLA-1 and HLA-2 markers showed that patients with tuberculosis concurrent with IDDM were intermediate between a group of patients with isolated tuberculosis and isolated IDDM.

Adolescent↗
PubMed1997

Genetic markers in the Tuvan population of Todja, Siberia.

Todja is a secluded region of northern Tuva-situated in the Sayany Mountains, Siberia. The aboriginal population of Todja is Tuvan. A total of 128 healthy Tuvans living in Todja were typed for HLA-A, -B and -C antigens and several plasma and erythrocyte protein polymorphisms (Hp, Tf, Gc, ESD, ACP, PGM1, PGD and ADA). The observed frequencies of all 8 blood protein and HLA genotypes were in agreement with Hardy-Weinberg expectations. The most frequent HLA antigens in Todjans are A2 (0.36), A3 (0.24), A9 (0.50), B15 (0.34) and B40 (0.50). HLA haplotypes A2B5, A2B40, A9B15 and A9B40 are most common in this population. The observed frequencies of protein polymorphisms and HLA antigens and haplotypes in Todjans are similar to those of other Mongoloid populations. A comparison of HLA frequencies currently observed in Todjans with those obtained 20 years ago at the same locality showed minor changes attributable to the effect of migration.

Adolescent↗
PubMed1997

[Specific features of pulmonary tuberculosis course in patients with insulin-dependent diabetes mellitus in relation to a varying HLA phenotype].

The examination and treatment of 67 new cases of infiltrative pulmonary tuberculous developed in the presence of insulin-dependent diabetes revealed two different types of the course of a tuberculous process. Due to therapy there was nearly complete resolution of inflammatory changes in 36 (54%) patients (Group 1). Large caseous foci of the tuberculoma type were formed in 31 (46%) patients (Group 2), including in 19 on admission and in 12 during chemotherapy Group 1 more frequently showed antigens of HLA A1 (p < 0.02) and DR2 (p < 0.01). Antigens of HLA B15 and DR6 were encountered only in this group. Those of HLA A2 (p < 0.01), DR3 (p < 0.01) were more commonly detected in Group 2. The HLA phenotype may be assumed to be an important factor that influences the course of pulmonary tuberculosis in patients with insulin-dependent mellitus and it may be of prognostic value.

Adult↗
PubMed1996

Association of various genetic markers with tuberculosis and other lung diseases in Tuvinian children.

SETTING: Heredity factors influence susceptibility to tuberculosis and other lung diseases. Recent immunogenetic studies have confirmed the genetic predisposition to lung diseases in different populations. Precise knowledge of genetic aspects of disease susceptibility is important for improvement of public health. OBJECTIVE: The aim of our research was to study the distribution of certain genetic markers in Tuvinian children suffering from tuberculosis and other lung diseases and to compare it with that in ethnically- and age-matched healthy donors. HLA-A, -B, -C and -DR antigens have been defined serologically by lymphocytotoxic assay, and variants of polymorphic protein loci Hp, Tf, Gc, ESD, ACP, PGM1, ADA, PGD have been defined by electrophoresis. RESULTS: It was demonstrated that in Tuvinian children with tuberculosis the frequencies of HLA-DR2 and HLA-DRw53 antigens are increased in comparison with healthy donors. In children with non-tuberculous chronic lung diseases with allergic components the frequency of HLA-A1, -B5 and -B8 antigens and of genetic variants Hp2-2 and ESD1-1 was elevated. CONCLUSION: HLA complex genetic factors influence susceptibility to tuberculosis and other lung diseases in Tuvinian children.

Adolescent↗
PubMed1996

[A genetic pool study of the population of the Republic of Tyva using genetic markers for the search for associations with tuberculosis].

Eighty three Tyvin patients with local pulmonary tuberculosis and 295 healthy donors of the same nationality were examined. They are resided in the central area of Tyva (in Kyzyl and its vicinities). In addition, 132 healthy Tyvin-Todjins were examined. Tuberculosis mortality was found to be associated with the antigen HLA-B15 in the Tyvins living in the central area of the Republic of Tyva (Kyzyl). The incidence of HLA antigens and polymorphic protein locus genotypes varies in different areas of the Republic of Tyva.

Blood Donors↗
PubMed1995

[Genetic aspects of BCG vaccination in experimental tuberculosis].

The paper discusses the genetic control of and the mechanisms of protective antituberculous immunity following BCG vaccination in inbred mice. The following genetic systems H-2 (B10.M)(H-2f) and B10.SM (H-2v) congenics were not protected with a high dose of BCG vaccine); Xid (X-linked immunodeficiency) CBA/N mice were not protected with regularly protective doses of BCG vaccine; Tbc-1 (I/St mice (Tbc-1s) were hypersensitive to tuberculosis. In two genetic systems (H-2 and xid), a distinct genetic control of susceptibility to primary tuberculosis and efficacy of BCG vaccination was demonstrated.

Animals↗
PubMed1995

[Significance of hereditary predisposition factors in the development and course of pulmonary tuberculosis].

Comprehensive clinical, genetic, epidemiological, and immunogenetic studies have established that tuberculosis is a multifactorial disease whose development and natural history are due to the interaction of environmental factors, primarily, to infection and hereditary predisposition. Associations between tuberculosis and various HLA loci B antigens, as well as HLA locus D-DR2 antigen have been detected in different populations. The HLA genotype was shown to differ in patients with favourable and unfavourable tuberculosis natural history. The comprehensive study of genetic markers allows one to make a prompt assessment of the nature of a tuberculous process, to define its prognosis and to correct treatment.

Commonwealth of Independent States↗
PubMed1993

[Course of infiltrating pulmonary tuberculosis depending on the patient's genotype].

To compare the disease course with regard to genetic markers carriage, the authors have examined 84 tuberculous patients. It was established that carriers of antigen HLA-DR2 and haptoglobin phenotype 2-2 have large cavities of destruction and more advanced dissemination. This trend is more evident in combination of above markers. These carriers are also noted to exhibit less advantageous run of pulmonary tuberculosis as shown by longer terms of the bacterial isolation and cavern healing.

Adult↗
PubMed1993

[Immunogenetic factors in pulmonary tuberculosis surgery].

Distribution of HLA antigens, haptoglobin phenotypes (Hp), ABO blood groups and rhesus factor was investigated in 60 patients with fibrocavernous tuberculosis and 50 patients with tuberculomas. All the patients were Russian and had a history of surgery for tuberculosis. Carriers of antigens B27, DR2 of HLA system, HP 2-2 and blood group 0 (I) were encountered more often in the group of tuberculosis patients. Antigens A1, B12, DR3 and A2 occurred among tuberculoma patients more frequently and less frequently, respectively. Among those who developed postoperative complications carriers of blood group A (II) were found significantly less frequently. Antigens HLA and Hp types were unrelated to the incidence of pleuropulmonary and infectious postoperative complications. Tuberculosis reactivation in the postoperative period and postoperative recurrences occurred more often in carriers of HLA antigen DR2.

ABO Blood-Group System↗
PubMed1993

[Immune status in patients with bone and joint tuberculosis and effect of HLA genotype].

The study included 41 patients (Uzbeks by nationality) with tuberculosis of the bones and joints. Of them 19 had localized tuberculosis and 22 disseminated process. The condition of T lymphocytes, B-lymphocytes and specific immunity were investigated by standard immunological methods. Typing by antigens HLA-DR was made with the help of standard microlymphocytotoxic test. It was established that patients with tuberculosis of the bones and joints have worse qualitative and quantitative characteristics of T lymphocytes, reduced number of B-lymphocytes, high specific response of lymphocytes to tuberculin compared to healthy subjects. Such patients have low B-cell level when they are free of antigen HLA-DR4. Carriers of HLA-DR2 antigen exhibit inhibited specific cellular immunity compared to those without this antigen.

B-Lymphocytes↗