No abstract

Replication of Staphylococcus aureus as well as phagocytosis by normal human leucocytes was studied in acetate and lactate containing dialysate in vitro. Bacterial replication was neither impaired nor promoted by the media tested. Phagocytosis occurred at the same rate in both solutions studied.

Three recipients of kidney allotransplants developed dysmyeloproliferative syndromes which were fully reversible after switching from azathioprine to cyclosporin A for immunosuppression. Similar bone marrow changes described in the literature progressed to leukemia. Whether the abnormalities observed in our patients could be early stages of the disease described in the literature and whether a fatal development can be prevented by changing the immunosuppressive therapy remains to be elucidated.

In a prospective study circulating immune complexes (CIC) were analyzed before and serially after renal transplantation in 141 consecutive patients. CIC were measured using the Raji cell assay as originally described by Theofilopoulos and Dixon. The amount of CIC was expressed as microgram heat aggregated human immunoglobulin G (IgG) equivalent/ml serum. The upper limit of normal sera was 25 micrograms/ml. The values are expressed as geometric means (- 1 SD/ + 1 SD). In 86 of 133 rejection episodes a renal biopsy was performed and the histopathologic changes were semiquantitatively assessed and classified in a cellular or vascular type of rejection. Before transplantation CIC were detected in 104 of 141 patients (73.8%) and the mean value was 65.6 (27.8-154.9) micrograms/ml. The level of CIC was positively correlated with the number of grafts (r: 0.43; P less than 0.01) and the occurrence of chronic active hepatitis (r: 0.31; P less than 0.01). No correlation was found between CIC and the underlying kidney disease, the number of blood transfusions prior to transplantation, and the pre-existing lymphocytotoxic antibodies. Graft survival and number of rejection episodes were not influenced by the level of CIC prior to transplantation. After transplantation CIC were elevated in 60 patients (41%), appeared transiently in 49 patients (35%) and were never detectable in 32 patients (23%). In patients with a graft survival less than or equal to 11 months the average and peak post-transplant CIC levels were significantly higher than patients with a graft survival of 12 months: 64.4 (21.8-191.0); 87.7 (26.0-295.8) versus 39.6 (18.4-85.3); 56.8 (21.0-150.1) micrograms/ml; P less than 0.01.(ABSTRACT TRUNCATED AT 250 WORDS)