[Are streptococcal infections on the rise?].
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Disease Outbreaks↗
Biomedical subjects
A Noess
Publications and source records attributed to A Noess.
Effects of clindamycin and cefuroxime on leukocyte membrane receptors and function.
Normal human granulocytes and lymphocytes were preincubated in 0.5, 5, or 50 mg/l of clindamycin, and 5, 50, or 500 mg/l of cefuroxime. Incubation with clindamycin caused an increase in the proportion of granulocytes bearing receptors for the Fc portion of IgG (Fc gamma-R) and C3b (C3b-R). Random migration in capillary tubes was significantly decreased, but phagocytosis as measured by chemiluminescence was only slightly decreased. The proportion of lymphocytes bearing Fc gamma-R was decreased, while there was no effect on lymphocyte C3b-R percentage, nor on the proportion of granulocytes or lymphocytes bearing sheep erythrocyte (E) receptors. Preincubation of granulocytes in cefuroxime was not associated with changes in the proportion of receptor-bearing cells, except for a slight increase in Fc gamma-R-bearing lymphocytes at the lowest concentration tested. Tube migration was not affected but chemiluminescence was significantly decreased. Preincubation with clindamycin, although increasing the proportion of cells bearing phagocytosis-associated receptors, is thus not associated with an increased phagocytic ability, while cefuroxime incubation caused a decrease in chemiluminescence despite normal levels of receptor-positive cells.
Antigens, Differentiation↗
Decrease of E and EA but not EAC rosette formation after incubation of blood lymphocytes in cerebrospinal fluid.
Peripheral blood lymphocytes (PBL) were incubated in autologous cerebrospinal fluid (CSF) or Hanks' balanced salt solution (HBSS) for between 5 and 60 min at 37 degrees C. Incubation in CSF caused an increase in cell death as measured by trypan blue inclusion. Incubation in CSF also resulted in a decreased percentage of E and EA rosette-forming cells (RFC)--but not of EAC-RFC--as compared with preincubation levels. Incubation in HBSS did not cause significant changes in rosette formation. Although incubation in CSF resulted in decreased E and EA rosette formation by PBL, lymphocytes isolated from CSF showed increased E and EAC rosette formation as compared with PBL.
Cell Survival↗