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Biomedical subjects

T Orłowski

Publications and source records attributed to T Orłowski.

At least 73 records · Page 4Linked to original sources
PubMed1979

Circulating suppressor cells in aplastic anemia.

In vitro proliferation and differentiation of hematopoietic stem cells was studied in a patient with aplastic anemia. Prior to therapy his peripheral blood contained a very low number of myeloid progenitors but a normal number of cells forming lymphoid colonies. Moreover, peripheral blood lymphocytes of this patient were able to suppress in vitro formation of myeloid colonies but not lymphoid colonies. This suppression effect was found to be sensitive to prednisolone and antithymocytic globulin. Following treatment with prednisolone, during which an apparent hematological recovery was observed, the level of lymphoid progenitors fell, but myeloid committed cells returned to normal and hematopoietic suppression was no longer detectable. These results indicate that cells suppressing hematopoiesis may circulate in the peripheral blood of some patients with aplastic anemia and the detection and testing of suceptibility of these cells to immunosuppressive drugs may be helpful in monitoring treatment and prognosis.

Anemia, Aplastic↗
PubMed1979

Factors responsible for the functional pattern of cadaveric kidneys stored up to 25 hours before transplantation.

The functional outcome after the transplantation of 97 cadaveric kidneys stored up to 25 hours with simple hypothermia was analysed in relation to age of donor, extent of pre-agonal kidney damage, the length of warm, cold and standardised ischaemic times and the presence of multiple renal arteries. Analysis of various factors showed that the most important for function after transplantation were pre-agonal anoxic damage and the ratio of the cold/warm ischaemia time. Based on that observation, a diagram has been proposed which allows calculation of the safe cold storage time after retrieval of the kidney.

Adolescent↗
PubMed1978

Study of antibody dependent cellular cytotoxicity (ADCC). II. ADCC activity in renal graft recipients and acute accelerated graft rejection.

ADCC activity in 27 cadaver renal allograft recipients was studied. All the patients were given standard immunosuppressive treatment. Significant positive correlation between high ADCC activity during first 5 days after grafting and accelerated rjection crisis was found. The high positive ADCC test may signalize the possibility of acute accelerated rejection of renal allograft.

Antibody-Dependent Cell Cytotoxicity↗
PubMed1978

Lymphokine-supressing cells in patients after kidney transplantation.

Streptococcal antigens elicit Leukocyte Migration Inhibitory Factor (LMIF) production by sensitive human lymphocytes in vitro leading to an inhibition of leukocyte migration in agarose plates. When mononuclear cells isolated from peripheral blood of healthy donors are added to the assay system, no significant alteration of LMIF generation occurs. Likewise, cells from patients with kidney allografts obtained during an uneventful postoperative course did not influence lymphokine synthesis. Conversely, cells isolated from patients undergoing acute graft rejection abolished SKSD-induced LMIF production by normal lymphocytes. These results support our earlier report of the existence of lymphokine-suppressing cells in man and suggest that they may play yet poorly defined role in certain immunopathologic situations.

Graft Rejection↗
PubMed1978

Lymphocyte dependent antibody (LDA) test in renal transplanted patients.

Using LDA test the presence of antibodies in patients prior to and post renal transplantation was studied. The relationship between the results of LDA test and graft rejection episodes, the treatment with large doses of prednisolone and CDC test performed simultaneously were analized. No correlation between results of LDA test prior to transplantation or its response to prednisolone treatment and acute rejection crises was found. The value of LDA test in predicting rejection episodes was not confirmed. LDA test detects antibodies 10 times more frequently than CDC test. The presence of cytotoxic antibodies CDC was not always connected with the presence of LDA and vice versa.

Antibody-Dependent Cell Cytotoxicity↗
PubMed1978

Study of antibody dependent cellular cytotoxicity (ADCC). III. Preliminary findings concerning the influence of immunosuppressive drugs.

The present studies were undertaken to characterize cytotoxic activity of lymphocyte-(ADCC) in the course of primary glomerulonephritis and to evaluate the influence of some of the immunosuppressive drugs on lymphocytes of examined patients. 18 patients were studied; 12 of them were treated by combined therapy with prednisone, azathioprine and chlorambucil. Results were analyzed on the basis of healthy individuals ADCC activity. In the 11 treated patients significant decrease of ADCC activity was observed while non-treated group exhibited as high activity as healthy individuals. Which of given drugs is responsible for the decreased ADCC activity, remains questionable and is currently under the study.

Adult↗
PubMed1978

The effect of uremia and dialysis on cell-mediated immunity.

Delayed-type hypersensitivity to PPD, two types T rosettes as well as lymphokine production were studied in patients with end-stage renal failure maintained on hemodialysis. A significant impairment of skin reactivity and the lowering of the number of T cells were found, while no definite changes of lymphokine production were detected. No conclusive data are obtained as to the role of hemodialysis in reversing of immunologic deficits noted in uremia.

Basement Membrane↗