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Biomedical subjects

N N Tupitsyn

Publications and source records attributed to N N Tupitsyn.

At least 91 records · Page 5Linked to original sources
PubMed1986

[Morphologic and cytochemical characteristics of lymphosarcoma in children with various immunologic subtypes of the disease].

Detailed immunological and cytochemical studies of tumour lymphoblasts in 44 children with lymphosarcoma involved a broad panel of monoclonal antibodies and xenogenic antisera allowed detecting cytomorphological differences between immunological subtypes of the disease. Most homogenic groups represented by T1 and T2 subtypes (L1 type) sharply differed from B-cellular lymphosarcoma (L2, L3, immunoblastic) while T3 and "zero" subtypes were more heterogenic.

B-Lymphocytes↗
PubMed1985

[Block of NK cell activity by ICO-11 monoclonal antibodies].

Antigen expression determined by ICO-11 monoclonal antibodies was studied on leukemia cells from bone marrow, blood cells from patients with lymphoproliferative diseases and natural killer (NK) cells responsible for natural resistance. ICO-11 monoclonal antibodies were shown to recognize the antigen expressed on NK-cells, predecessors of T-cells (thymocytes), myelomonocytes (myeloblasts, monoblasts) and to block NK-cell activity.

Adolescent↗
PubMed1985

[Isolation and characteristics of IKO-GM-1 monoclonal antibodies].

The hybridoma clone IKO-GM-1 was obtained as a result of fusion of P3X63Ag8.653 cells with splenocytes of BALB/c mice with the aid of 50% polyethyleneglycol. Antigen demonstrated by antibodies IKO-GM-1 expressed on 100% polymorphonuclear neutrophils, 54.4 +/- 3.1% monocytes, 25.9 +/- 2.4% mononuclears of healthy subjects' blood, on 11.1 +/- 1.0% T lymphocytes, on 14.6 +/- 1.6% T lymphocytes bearing Fc-receptor for IgG, on 49.3 +/- 8.2% enriched population of B lymphocytes and O cells. The treatment of healthy donors' mononuclears with antibodies IKO-GM-1 and complement blocked EK cellular activity against Molt-2 cells but not against K-562 cells. Antigen demonstrated by MAT IKO-GM-1 did not express on the colony-forming granulocyte or macrophagal cells. Antigen expressed on blast cells of patients with AMonoL, on those in part of patients with AML and AMML, on leukocytes of patients with chronic ML, on monocytes of a patient with chronic MonoL. Antigen was absent from blast cells of patients with ALL, LSA, on lymphocytes of patients with ChLL.

Animals↗
PubMed1985

[Immunologic phenotype of blast cells in the diagnosis of myeloblastic leukemias].

A study was made of immunologic cell markers in 32 patients with acute myeloid leukemia by indirect immunofluorescence with the aid of xenogeneic antisera and monoclonal antibodies obtained by the authors. Ia-like antigen demonstrated by monoclonal antisera IKO-I expressed in myeloblastic leukemia with maturation in myelomonoblastic leukemia and in all patients with monoblastic leukemia. Antigen of EK-cells demonstrated by monoclonal antibodies IKO-II was found in 10 out of 18 patients. The number of antigen positive cells correlated with the number of monoblasts. One out of 22 patients showed 19% of cells which express with OLL antigen. In 2 out of 18 cases, the blast cells carried T-cell antigens. A remission was attained in 1 out of these 2 patients treated similarly to patients with OLL.

Animals↗
PubMedDate not supplied

[Dipeptidyl aminopeptidase-IV as a histochemical marker of differential diagnosis of large cell anaplastic CD30+-lymphoma and Hodgkin's disease].

Using histochemical methods, we studied distribution of dipeptidylaminopeptidase-IV (DPP-IV) in tumor cells of 16 patients with non-Hodgkin's malignant lymphomas (NHL) including B-cell NHL (10 cases), pleomorphic T-cell lymphoma (1 case), CD30+ anaplastic large cell lymphoma (ALCL) of T-cell (1 case) and ALCL of null-cell type (4 cases) and of 13 patients with Hodgkin's disease (HD). The results indicate that tumour cells of pleomorphic T-cell NHL and ALCL of T- and null-cell type showed DPP-IV activity. In contrast, no DPP-IV activity was seen in the tumor cells of B-cell NHL (lymphocytic, centroblastic/centrocytic, centroblastic, immunoblastic), in Berezovsky-Reed-Sternberg and Hodgkin's cells of different HD variants. These results demonstrate that difference in DPP-IV activity between tumor cells of ALCL and HD may be diagnostically important for separation of ALCL from HD and moreover may be used in verification of the borderline between HD-like ALCL and ALCL-like HD. It is possible that DPP-IV activity contributes to pathogenesis of ALCL and may determine clinical behaviour of this NHL being involved in autocrine and paracrine regulation of tumor cell growth of ALCL.

Biomarkers, Tumor↗
PubMedDate not supplied

[Lymphoproliferative diseases of the orbit and appendages of the eye].

The results are available of clinical, morphological, cytological and immunological investigations of orbital lymphomas and lymphomas of appendages of the eye. Malignant lymphoma was detected in 17 patients and reactive lymphoid hyperplasia in 3 patients. All the malignant lymphomas had B-cell phenotype. By cell composition, MALT-lymphoma is more polymorphic than lymphoma from mantle zone cells and lymphoma from small lymphocytes and centro follicular lymphoma. The conjunctive is affected primarily with lymphoma from marginal zone cells or mantle zone cells. As a rule, this is a primary local lesion. Other variants of orbital lymphoma and lymphoma of the eye appendages develop more often as secondary lesions in systemic disease and are characterized by more aggressive course. The key in differential diagnosis of reactive lymphoid hyperplasia and small cells lymphomas is immunophenotyping, especially at initial stages of the tumor process.

Adult↗
PubMedDate not supplied

[Phenotype characteristics of skin dendritic cells in patients with psoriatic arthritis during the treatment with deresinated naphthalan].

The study of the phenotype of immunocompetent dendritic cells of the skin in patients with psoriatic arthritis in the course of treatment with deresinated naphthalan (DRN) has revealed some aspects of the mechanism of therapeutic action of DRN. Use of the complex of monoclonal antibodies allowed the authors to determine membrane markers of various cells belonging to the system of mononuclear phagocytes and participating in development of immunoinflammation in the skin. The active stage of the disease is characterized by a fall in the number of CDIa+ cells. HLA-DR+ cells are more resistant. DRN therapy led to prevalence of CDIa+ cells.

Anti-Inflammatory Agents, Non-Steroidal↗
PubMedDate not supplied

[Keratinocyte immunophenotypes in patients with psoriatic arthritis and their changes after treatment with deresinated naphthalan].

The study of phenotyping features, membrane markers of epidermic keratinocytes, their production of adhesive molecules has established structural basis of favourable effect of deresinated naphthalan on the skin and articular syndromes in patients with psoriatic adtheritis. The immunohistochemical examination of the skin biopsies using monoclonal antibodies in the test of indirect immunofluorescence has found that deresinated naphthalan in patients suppresses immunoinflammatory reactions in the skin. Monitoring of expression of molecules HLA--on keratinocytes may be helpful for prediction of the skin and joint manifestation.

Administration, Topical↗
PubMedDate not supplied

[Mantle cell lymphoma].

Two morphological variants of mantle cell lymphoma are described: classic and blastoid. The former consists of small and medium-size cells, the latter is represented by cells with lympho- and centroblast morphology. An immunohistochemical examination has established a high degree of cyclic D1 expression by these lymphomas.

Antigens, CD↗
PubMedDate not supplied

[The role of epithelial antigens in diagnosis and staging of breast cancer].

The study of different epithelial antigen expression has been performed in 183 breast cancers. In 73 patients regional lymph nodes were studied as well. Panepithelial antigen Egp-34 (Mab HEA-125) was expressed in 100% of primary tumors and metastases. Antigen MUC-1 (Mab ICO-25) was identified in 93% of breast cancers. Monomorphic type of expression in tumor cells was typical for Egp-34, MUC-1 being in certain cases expressed as a proportion of cells. Additional immunohistochemical study of regional lymph nodes with Mab to Egp34 and MUC-1 provides a 10% increase in the rate of breast cancer metastases detection compared to histological examination alone. The carcinoembryonic antigen (CEA) was useful in identification of metastases only in CEA-positive breast cancers.

Adult↗
PubMedDate not supplied

[Diagnosis of chronic lymphoid leukemia (an immunomorphological study)].

31 cases of chronic lymphoid leukemia (CLL)/lymphoma from small lymphocytes (LSL) was studied immunomorphologically. All cases had B-phenotype and positive expression of markers CD 5, CD 23. Most characteristic for CLL/LSL was pseudofollicular character of tumour growth. Two morphological variants of CLL/LSL having similar phenotype were distinguished: typical variant with roundish conturs of tumour cells and atypical with centrocytoid morphology of tumour cell nuclei.

Adult↗
PubMedDate not supplied

[Hodgkin lymphoma with lymphoid predominance: differential diagnosis of nodular lymphoid predominance and classical variant].

A topical problem of differential diagnosis of nodular lymphoid predominance of Hodgkin's lymphoma and classical variant rich in lymphocytes is discussed. Main morphological diagnostic criteria are considered on the basis of the authors' observations and literature data. Immunological characteristics of two variants of Hodgkin's lymphoma with lymphoid predominance are reviewed.

Adolescent↗