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D Rozynkowa

Publications and source records attributed to D Rozynkowa.

At least 19 recordsLinked to original sources
PubMed1994

Studies on bcl-2 protein in cultured lymphoid cells.

Bcl-2 protein was analysed in cell cultures derived from non-Hodgkin lymphomas and chronic lymphocytic leukaemia patients. The presence of bcl-2 proto-oncogene protein product has been demonstrated on cytospin preparations utilising immunochemical methods. The correlation between the expression of the bcl-2 protein and the appearance of proliferation- or differentiation related figures was studied. The reported bcl-2 up regulation in malignant lymphoid cells was confirmed in haemo- and lymphopoietic progenitor cells as well as in TPA/PHA activated peripheral blood lymphocytes. In comparison to neoplastic cells lower intensity of bcl-2 positive staining in freshly isolated cells from non-leukaemic tissue was observed.

Antibodies, Monoclonal↗
PubMed1993

[In vitro studies directed at inducing differentiation of leukemic B-lymphocytes].

Lipopolysaccharide (LPS) and phorbol esters (TPA) stimulate lymphocytes proliferation in two different ways. While LPS primary function is specific receptor binding, TPA directly activate cellular protein kinase C. The stimulation of human leukaemic lymphocytes (from chronic lymphocytic leukaemia patients) with LPS and TPA results in two different types of response: to both stimulators, and to LPS only. Therefore the supposed defect of cellular receptors can not explain all the observed effects. The existence of TPA independent second messengers and changes in signal transduction pathways downstream of PKC can be considered.

Antigens, Differentiation, B-Lymphocyte↗
PubMed1993

[Myelodysplastic syndrome associated with clonal proliferation of B lymphocytes].

We present an unusual case of the myelodysplastic syndrome (subtype refractory anemia with the excess of blasts in transformation--RAEB-t) associated with significant increase of IgG (4,700 mg/dl), lambda (160 U/dl) in blood serum and circulating clone of B lymphocytes SIgG, lambda, manifesting clonal rearrangement of JH domain. Peripheral blood cells of the patient showed two different chromosomal abnormalities: 47,XY, + del/8/p? and 47,XY, +22, +14, -19. We suppose that two independent neoplastic clones are developed in the described case, i.e. a population displaying markers of myeloblasts and monoblasts, and a clone of B lymphocytes.

Aged↗
PubMed1992

[Immunologic phenotype of lymphocytes in chronic B-cell lymphocytic leukemia. II. Studies of immunologic phenotype of peripheral blood and lymph node lymphocytes in patients with chronic lymphocytic leukemia or leukemic forms of lymphoplasmacytoid lymphoma].

UNLABELLED: In a group of 16 patients with chronic lymphocytic leukaemia and leukaemic forms of the lymphoma lymphoplasmocytoides immunophenotypes of peripheral blood and lymph node lymphocytes were studied. CONCLUSIONS: 1) immunophenotype heterogeneity observed in a minority of patients in lymph-nodes or peripheral blood seems to be connected with the co-existence of leukaemic and normal reactive B-cells, 2) SIgG+ cells seem to represent activated B lymphocytes producing and secreting autoantibodies, 3) circulating peripheral T lymphocytes do not reflect the distribution of T cell subpopulations in lymph-nodes.

Adult↗
PubMed1986

Different maturation capabilities of chronic lymphocytic leukaemia lymphocytes in vitro.

Peripheral blood lymphocytes from five patients with B-derived chronic lymphocytic leukaemia were stimulated by Staphylococcus aureus strain Cowan together with T cell mitogen phytohaemagglutinin in 5-9 days suspension cultures. The responses of B lymphocytes were studied on a T cell depleted subpopulation, obtained from harvested lymphocyte cultures using the sheep red blood cell rosette technique. Proliferation tests were performed using a 3H-TdR blast cell index. The maturation process of B-lymphocytes was examined with cytoplasmic Ig studied by FITC-conjugated antisera. Results analysed indicate various degrees of maturation of B cells in different patients.

B-Lymphocytes↗
PubMed1985

Increased expression of fragile site Xq by hydroxyurea. Preliminary communication.

The addition of hydroxyurea in final concentration 1.3 X 10(-5) M increases the frequency of fraX in comparison with cultures without hydroxyurea. The same concentration of hydroxyurea did not induce fraX formation and "nonspecific" gaps in cultures of lymphocytes derive from healthy individuals. The possible explanation of this effect is discussed.

Cells, Cultured↗
PubMed1985

Interindividual phenotypic variations in CLL B lymphocyte maturation indication of different maturation blocks.

Peripheral blood lymphocytes from 8 patients with B-derived chronic lymphocytic leukaemia were stimulated by Staphylococcus aureus bacteria strain Cowan 1 with T cell mitogens PHA or PWM in 5-7 day suspension cultures. For the first group of patients proliferation and maturation tests were performed on T cell enriched and T cell depleted subpopulations, obtained from harvested lymphocytes at the end of cultures by the sheep red cell rosette technique. To re-examine mutual influences of cultivated T and B cells in the second group of experiments, lymphocytes from CLL patients and from 5 healthy individuals were investigated by the use of transmembrane cocultivation system after Feldman and Basten. The proliferative responses to lectin and to bacteria were assessed by 3HTdR-blastic and mitotic indices. The maturation process of B lymphocytes was examined by cytoplasmic Ig, studied by FITC-conjugated antisera. Results obtained with cocultivation system support the view that T cell replacing factor(s) were required for inducing prolonged growth and development of maturation of more numerous B lymphocytes in response to Staphylococcus aureus, a T cell independent, B specific polyclonal stimulator. Results analysed in different patients indicate various degrees of maturation of B cells including their differentiation towards a plasmacytoid cell, accompanied by various proliferative capacities of B and T lymphocytes. This functional analysis reflects the heterogeneity of B-CLL patients group.

Adult↗
PubMed1983

Cytogenetic findings in 311 couples with infertility and reproductive disorders.

Chromosome studies in married couples were performed in order to elucidate their infertility, spontaneous abortions and foetal wastage. Peripheral blood lymphocyte metaphases of 311 persons revealed chromosomal abnormalities in 26 married people. Chromosome aberrations found here were distributed among sex chromosome aneuploidy (complete and mosaic form), structural anomalies of the Y chromosome, autosomal chromosome aneuploidy (mosaic form), and balanced autosomal translocations (complete and mosaic forms). Chromosomal structural variants were observed in chromosome A-1 (1qh +) in one person and in acrocentric chromosomes in 21 persons. They consisted mainly in elongated secondary constriction (NOR) and in large or very large satellites. The acrocentric association frequencies per metaphase were strongly increased in a group of probands carrying acrocentric variants. Their significance awaits further study.

Abortion, Spontaneous↗
PubMed1978

Down syndrome - transferrin parallels plasma iron changes.

The transferrin level was studied in patients with simple trisomy 21 and with Robertsonian unbalanced translocations 21/22 and 21/14. In all these groups of patients, known to have significantly lowered plasma iron levels, the transferrin levels were found to be decreased with respect to the control group.

Adolescent↗