ABSTRACT
Platelet concentrates (PCs) obtained using old generation of cell separators contain high number of leukocytes. White cell (WBC) contamination and platelet (Plts) number in PCs obtained from separator II-nd generation CS-3000 and separators III-rd generations CS-3000 plus and Cobe-Spectra have been determined. PCs from new separators contain the same Plts number as PCs from CS-3000. The average leukocyte count in PCs obtained from CS-3000 was 171.26 x 10(6), whereas WBC number in PCs from CS-3000 plus and Cobe-Spectra were 2.87 and 2.54 x 10(6) respectively. In about 85% of PCs obtained from III-rd generation cell separators the leukocyte count did not exceed 5 x 10(6). This count is considered sufficient to prevent alloimmunization of HLA antigens. The determination of WBC count in every PCs allows to select PCs with fewer than 5 x 10(6) leukocytes and to transfuse them without the necessity of using expensive filters for leukocyte removing.
Subject(s)
Cell Separation/instrumentation , Cell Separation/standards , Blood Platelets/immunology , Equipment Contamination , Equipment Design , Filtration , HLA Antigens/immunology , Humans , Immunoglobulin Allotypes/immunology , Leukocyte Count , Platelet CountABSTRACT
During a platelet apheresis procedure on CS-3000 the platelet concentrate (Pc) is centrifugated for about 1.5 h. In the Cobe system Pc is gradually collected in a container located outside the machine. Influence of both techniques on platelet viability and function was examined in vitro. MPV, hypotonic stress response (HSR), aggregation using ADP, activity and percent leakage of lactic dehydrogenase (LDH) were similar in both groups. ATP contents in platelets (Plts) obtained on CS-3000 reached 5.18 +/- 0.75 mumol/10(11) Plts and was significantly lower than in Plts collected on Cobe-Spectra: 7.26 +/- 1.00 mumol/10(11) Plts. The functions of Plts obtained on both blood cell separators, immediately after collection, appeared to be correct. ATP level reduction in Plts from CS-3000 suggests that prolonged centrifugation leads to Plts activation which can affect cells during storage.
Subject(s)
Blood Platelets/physiology , Plateletpheresis/instrumentation , Blood Preservation , Equipment Design , Humans , Platelet Activation , Platelet Function TestsSubject(s)
Chromosome Aberrations , Radiation Tolerance , Animals , Cell Line , Leukemia, Lymphoid , Mice , Time FactorsABSTRACT
T protein was isolated from Streptococcus pyogenes types 1 and 12 by application CNBr-sepharose-trypsin and purified by ion exchange chromatography. It was indicated that purified T1 and T12 proteins have lymphocyte transforming activity. It was also observed that T12 protein induces immediate and delayed type hypersensitivity in guinea pigs previously sensitized with T12 antigen emulsified with complete FREUND's adjuvant.
