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O A Rukavitsyn

Publications and source records attributed to O A Rukavitsyn.

30 records · Page 2Linked to original sources
PubMed1997

[The importance of studies of the glycosaminoglycans in the peripheral blood leukocytes of patients in the diagnosis of the phases of chronic myeloleukemia].

To elucidate new diagnostic markers of chronic myeloid leukemia (CML) phases, we investigated quantitative and qualitative composition of glycosaminoglycans (GAG) of leukocytes from peripheral blood of 72 patients. Chronic CML phase was characterized by elevated GAG levels (2 times compared to normal values), weakening of anionic properties of chondroitin sulfate (CS) and high amount of heparan sulfate (HS). In CML transformation in the progressive phase overall concentration of GAG grew still higher, GAG fraction composition changed. In the blast crisis there was a sharp fall in the overall GAG, new electrophoretic fractions emerged. In the myeloid variant of the crisis an additional GAG component appeared (GAG-m), whereas in the lymphoid variant another component was found (GAG-1). It is suggested that the number and composition of GAG in peripheral blood leukocytes may serve markers of CML phase.

Biomarkers↗
PubMed1996

[The effectiveness of reaferone in chronic myeloid leukemia assessed with ultrasonic and histomorphologic examination].

The effectiveness of reapherone administration for treatment of chronic myeloid leukemia has been studied using sonography of the liver and spleen as well as morphometry of histological patterns of the bone marrow. The study group included 17 patients (chronic disease-16; progressing disease-1). Ten patients received reapherone and 7-myelosan. Dynamic evaluation of scanning evidence for liver and spleen proved instrumental in assessing the effect of reapherone therapy of chronic myeloid leukemia. Similar tendencies were identified by sonography and morphometry applications: reapherone-treated patients revealed decreased liver and spleen, foci of fibrosis dissolving while the morphometric findings pointed to the decreasing indices of collagenous fibrosis and megacariocytic source of the bone marrow. It is suggested that reapherone acts upon the hemopoietic tissue indirectly-via endosal cells of the bone marrow stroma.

Abdomen↗
PubMed1996

[Is the cytogenetic verification of chronic myeloleukemia always obligatory?].

To elucidate feasibility of accurate diagnosis of chronic myeloid leukemia (CML) without cytogenetic and molecular-genetic investigations as well as to specify CML diagnostic criteria, clinicohematological parameters were compared in two groups of patients: with Ph'-chromosome and/or rearrangement of fragment bcr (group 1), with unknown karyotype in whom detection of bcr fragment rearrangement was not made. Clinicohematological parameters in both groups were close in absolute value and underwent parallel changes in the course of leukemia progression. In group 1, patients in progressive and blastic phase compared to patients in chronic phase had a 14-fold increase in the number of additional cytogenetic anomalies. In patients with tumor transformation fragment bcr underwent rearrangement according to type B2A2. Thus, the diagnosis of typical CML variants is feasible without detection of Ph'-chromosome and/or rearrangement of bcr fragment. It is especially true and essential for patients in the chronic phase. The data obtained provide more accurate diagnostic criteria of CML.

Adolescent↗
PubMed1995

[Experience with the use of reaferon (alfa 2-interferon) for treating patients with chronic myeloleukemia].

The effectiveness of domestic alpha 2-interferon preparation reaferon was studied in vivo and in vitro for eradication of pathological hemopoietic clone in chronic myeloid leukemia. Reaferon administration for 1-30 months produced cytogenetic remission in 7%, hematological remission in 21%, partial hematological remission in 36% of the patients. Reaferon is indicated in chronic myeloid leukemia without splenomegaly. In the disease progression reaferon is uneffective. Mechanism of reaferon therapeutic action comprises three components: a direct antiproliferative effect on hemopoietic precursor cells, activation of cellular immunity, an effect on stem cell microenvironment.

Adult↗
PubMed1995

[Morphological and pathogenetic aspects of aplastic anemia].

A complex study of colony-stimulating properties of cells-precursors of granulomonocytopoiesis, morphological parameters of the marrow histological structures and immunological parameters was carried out in 90 patients to specify pathogenic mechanisms of aplastic anemia (AA) development. 95% of patients appeared to have sharp decrease of the marrow colony-stimulating properties and only 5% had normal initial indexes. In most patients endostal cell number increased, while the content of reticulocytes grew higher in more than 30% of patients. Defect of the marrow stroma functioning was registered in 23% of patients. Increase of the osseous tissue volume and osteocyte number was found. Dysbalance in cellular link of immunity was demonstrated. Only temporal increase of the marrow colony-stimulating properties was marked in some patients on the background of treatment with antilymphocyte globulin, despite the clinic-hematological improvement. Multifactor pathophysiological mechanisms, the main of which is the stem cell defect lies in the base of AA pathogenesis. Hemopoietic microenvironment pathology is not the leading reason of the hemopoiesis depression but it contributes greatly in its development. Immunological alterations in patients with AA are secondary and can be partly corrected with treatment with ALG.

Adolescent↗
PubMed1993

[A comparative analysis of the effect of alpha 2-interferon (reaferon) therapy on the morphofunctional state of the bone marrow in patients with chronic myeloleukemia].

Marrow trepan biopsy was performed in 11 patients upon diagnosis of chronic myeloid leukemia and in clinicohematological remission of the disease. The patients were treated with alpha 2-interferon (reaferon) versus conventional myelosan (6 and 5 patients, respectively). The biopsies were studied histomorphometrically. In reaferon group the number of megakaryocytes and endosteal stromal cells diminished. This may be due to an indirect action of reaferon on hemopoietic tissue via endosteal cells of the marrow stroma. Reaferon is recommended for myeloid leukemia chronic with a granulocytic-megakaryocytic histological variant of the disease.

Adolescent↗
PubMed1993

[The necessity for the combined use of the ultrasonic study of the abdominal cavity organs and of the histomorphometry of the bone marrow in chronic myeloleukemia].

Forty-one patients with chronic myeloid leukemia (CML) were divided into 3 groups: 13 patients in a chronic phase prior to cytostatic treatment group 1; 17 patients in a chronic phase treated with myelosan group 2; 11 patients in a blast transformation phase group 3. All of them underwent abdominal sonography in line with marrow histomorphometry. Ultrasound investigation is thought indispensable in examination of CML patients as it registers negligible enlargement of the liver and spleen and provided their echo structure. It makes possible to trace stages of the tumor process development. CML involves in the pathological process the kidneys as shown by changes in the echo pattern, concrements are often formed in the pelvicalyceal system. Group 1 patients demonstrated reduced area of the bone tissue by morphometrical evaluation of the bone marrow. This means prevalence of osteolysis in CML onset. In group 3 patients this value is higher indicating osteosclerosis predominance. Comparison of the ultrasonic and histomorphometric data suggest that enlargement of the spleen and liver with diffuse vegetations of the connective tissue and their fibrotic lesion of the parenchyma correlated with the severity dissemination of hemopoietic tissue collagen fibrosis. It is evident that CML is characterized by fibrosis involving simultaneously bone marrow, splenic and hepatic parenchyma.

Abdomen↗
PubMedDate not supplied

[Sonographic and histomorphologic parallels in various histologic variants of chronic myeloid leukemia].

Histomorphometric findings at the study of marrow puncture specimens were compared to sonographic picture of the liver and spleen in 20 myeloid leukemia chronic. Histomorphometric and sonographic changes observed showed parallel pathological processes in the hemopoietic micro-surroundings and in the liver, spleen. Sonography proved able to considerably broaden diagnostic armory of the physician, to prognosticate leukemia outcomes, thus suggesting a differential approach to the disease treatment.

Adolescent↗
PubMedDate not supplied

[Morphologic structural characteristics of the hematopoietic microenvironment in patients with multiple myeloma].

The authors' investigations found plasmocytic infiltration of bone marrow and marked resorption of bone tissue in patients with multiple myeloma (MM). Instead of the expected reduction in bone marrow volume the latter slightly increased. MM patients have significantly higher quantity of endosteal stromal cells, accumulations of osteoblastic cellular elements considered as initial osteogenesis. A close correlation was revealed between bone tissue volume, number of erythroid elements in bone marrow and red cell count in peripheral blood. Volume of fatty tissues in MM patients is low. MM patients demonstrate pronounced morphofuctional disturbances in hemopoietic microenvironment of bone marrow.

Adult↗
PubMedDate not supplied

[Morphofunctional characteristics of stromal structures of bone marrow in aplastic anemia patients].

Stromal structures of the bone marrow in 22 patients with aplastic anemia (AA) were studied histophotometrically. A significant increase of the fat tissue volume and a decrease of hematopoietic tissue volume were observed. Bone tissue volume was significantly increased in 81.8% of patients, the number of endosteal cells was increased in all the patients and that of reticular cells in one third of them. The conclusion is made that hematopoietic microenvironment of the bone is not a determining factor in the majority of AA patients. Excessive bone formation might be one of the mechanisms of aplasia development.

Adipose Tissue↗
PubMedDate not supplied

[Certain biochemical features of leukocytes in blast crisis of chronic myelogenous leukemia].

The content of nuclear high mobility group (HMG) proteins, activities of ornithine decarboxylase (ODC), adenosine deaminase (ADA) and purine nucleoside phosphorylase (PNP) and also glycosaminoglycan (GAG) content and composition were studied in leukocytes of patients with chronic myelogenous leukemia in the phase of blast crisis (BC CML). Myeloid and lymphoid cytochemical variants of BC CML differ by biochemical parameters. It is suggested, that the content of HMG-proteins, activities of ODC and PNP, and electrophoretic patterns of GAGs could be used in diagnostics of two main variants of BC CML.

Blast Crisis↗