The aim of this study was to observe the difference in respect to the leukocyte reduction efficiency and quality of fresh-frozen plasma (FFP) from filtered whole blood between two types of in-line filters wherein only filter materials were surface modified by the two methods respectively. Whole blood was kept in refrigerator and filtered within 6 h of collection at ambient temperature. Samples were taken pre- and post filtration for analysis of WBC numbers, coagulation factors and complement activation (n = 8 for each type of filter). All filtered units contained < 2. 5 x 10(6) residual leucocytes. RBCs recovery was over 93%. No significant difference between group A and B was seen. But group B appeared to take longer time for filtration than did group A (9'29" vs. 8'01"). Neither group A nor group B showed statistically significant losses of total protein, album, IgG, IgM, fibrin, factors VIII, IX, vWF and C3 (P > 0.05). Factor V, XI and AT-III decreased significantly in two group filters. Group B showed more significant losses of IgA content and factor V activity than did group A, which appeared to be related to the difference in surface character between group A and group B filters. These two types of filters could remove leukocytes effectively, and no significant changes were observed in the quality of FFP from the filtered whole blood. It is presumed that the filter material with better bio-compatibility will give a high recovery of plasma protein and coagulation factors after filtration.
Blood Coagulation Factors ; metabolism ; Filtration ; instrumentation ; methods ; Humans ; Leukocyte Count ; Leukocyte Reduction Procedures ; instrumentation ; methods

To evaluate flow-cytometry and Nageotte method for counting residual WBC in thrombocytaphoresis concentrates, their accuracies were determined by dilution studies separately; the repeatability was determined by measuring the interassay coefficient of variation for 14 replicates of a sample with known leukocyte concentration. 102 samples of leukocyte-depleted thrombocytaphoresis concentrates were detected by the above mentioned two methods, and the results were compared each other. The results showed that no difference was observed between two methods over a range of leukocyte concentrations from 0.8 to 10 WBC/microl (P > 0.05). In conclusion, flow-cytometry and Nageotte methods can be used for quality control of WBC-reduced blood components.
Blood Component Transfusion ; Evaluation Studies as Topic ; Flow Cytometry ; Humans ; Leukocyte Count ; methods ; Leukocyte Reduction Procedures ; methods ; Plateletpheresis

White blood cells (WBCs) and storage period are the main factors of transfusion reactions. In the present study, cytokine/chemokine concentrations after leukoreduction (LR) and irradiation (IR) in stored canine whole blood were measured. Red blood cell storage lesion caused by IR and LR were also compared. Blood samples from 10 healthy Beagles were divided into four groups (no treatment, LR-, IR-, and LR + IR-treated). Leukocytes were removed by filtration in the LR group and gamma radiation (25 Gy) was applied in the IR group. Immunologic factors (WBCs, interleukin-6 [IL-6], C-X-C motif chemokine ligand 8 [CXCL-8], and tumor necrosis factor-alpha) and storage lesion factors (blood pH, potassium, and hemolysis) were evaluated on storage days 0, 7, 14, 21, and 28. Compared to the treated groups, IL-6 and CXCL-8 concentrations during storage were significantly higher in the control (no treatment) group. LR did not show changes in cytokine/chemokine concentrations, and storage lesion presence was relatively mild. IR significantly increased CXCL-8 after 14 days of storage, but IR of leukoreduced blood did not increase CXCL-8 during 28 days of storage. Storage lesions such as hemolysis, increased potassium, and low pH were observed 7 days after IR and storage of blood, regardless of LR. IR of leukoreduced blood is beneficial to avoid immune reactions; however, storage lesions should be considered upon storage.
Blood Preservation ; Down-Regulation ; Erythrocytes ; Filtration ; Gamma Rays ; Hemolysis ; Hydrogen-Ion Concentration ; Immunologic Factors ; Interleukin-6 ; Leukocyte Reduction Procedures ; Leukocytes ; Necrosis ; Potassium ; Transfusion Reaction

BACKGROUND: Knowing how the protein profile of platelet products changes with storage or leukoreduction may give us greater insight into cell physiology and the cause of transfusion reactions other than cytokines and chemokines. METHODS: We filtered four packs of platelet concentrates (PC) within 24 hr of blood collection and after 120 hrs of storage. Four aliquots of each supernatant in PC were obtained: pre-storage+prefiltration, pre-storage+post-filtration, post-storage+pre-filtration and post-storage+post-filtration. Routine chemistry tests and a two-dimensional electrophoresis (2-DE) were performed. The stained images were analyzed and the significant spots were identified using a peptide mass finger printing (PMF) with matrix assisted laser desorption/ionization-time of flight (MALDI-TOF) analysis after trypsin digestion. RESULTS: The protein spots increased with storage and decreased after filtration (P<0.05, prestorage+post-filtration). The spot density of various proteins, including macrophage inflammatory protein-2 alpha, megakaryocyte colony stimulating factor and interleukin-22 changed with storage and leukoreduction. CONCLUSIONS: The database of identified protein spots and their changes produced in this study is a useful basic tool for future studies on the mechanism of transfusion reactions. Further studies should validate the significance of each protein spot.
Blood Platelets/*chemistry ; Blood Preservation ; Electrophoresis, Gel, Two-Dimensional ; Humans ; Leukocyte Reduction Procedures ; *Platelet Transfusion ; Proteome/*analysis ; *Proteomics ; Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization ; Time Factors

OBJECTIVE: To explore the effect of a reforming leukocyte depletion filter (LDF-1) on the functional and pathologic changes of canine kidney during cardiopulmonary bypass (CPB). METHODS: Twelve Mongolian dogs were randomly allocated into a control group (no LDF-1, n = 6) or a leukocyte-depleted filter group (LDF-1 placed in venous line, n = 6). CPB of the dogs anestheitized with sodium pentobarbitone at 25 mg/kg was set up. After 10 min of CPB, aorta was clamped and St. Thomas cardioplegic solution at 20 mg/kg was immediately injected into the root of aorta. The aortic cross-clamp was released and CPB was closed at 70 min. Dogs were observed for 2 h after weaning from CPB. LDF-1 was opened at 2 min and stoped at 7 min during initially running CPB in the LDF-1 group. Circulating leukocytes, plasma L-selectin, and plasma IL-8 were respectively counted before CPB, at 10 minutes, 40 min, and 75 min during CPB, the end of CPB, and 2 h after CPB. The urine analysis and renal pathology, which were obtained before CPB and 2 h after CPB, were observed. RESULTS: The number of leukocytes significantly decreased by 55% - 68% in the LDF-1 group compared with the baseline during CPB. The value at 10 min of CPB in the LDF-1 group was lower than that in the control group (P < 0.05). Plasma levels of L-selectin and IL-8 obviously increased in the 2 groups compared with the baseline during CPB, but both levels at 2 h after CPB in the LDF-1 group were lower than those in the control group (P <0. 05). No statistic difference was found in plasma levels of urea and creatinine, but hematuria was observed in the 2 groups at 2 hours after CPB. The pathologic changes of kidney, which was mainly renal tubule swelling accompanied partly with vacuolar degeneration, were similar under the light microscope in the 2 groups at 2 h after CPB. Obvious glomerular damage was not found. CONCLUSION LDF-1 can effectively decrease leukocyte counts and the inflammatory reaction, but it can not bring about excellent protective effect on kidney during CPB when used alone. Attention to should be paid the renal protection in the postoperative CPB.
Acute Kidney Injury ; prevention & control ; Animals ; Cardiopulmonary Bypass ; Dogs ; Female ; Filtration ; Kidney Function Tests ; Leukocyte Reduction Procedures ; methods ; Leukocytes ; Male ; Random Allocation

This study was aimed to investigate the effect of leukocyte depletion by filtration on the quality of apheresis platelets. 20 units of donor apheresis platelets were randomly selected and were preserved with agitation at 20 - 24 degrees C for 24 - 96 hours, then were filtered on polyester flatbed filters. The platelet concentration, mean platelet volume (MPV), volume of apheresis platelets, leukocyte count, pH value, lactate dehydrogenase (LDH) concentration, K(+) concentration and CD62p expression level on surface of platelet membrane, were detected before and after filtration, as well as the rate of leukocyte depletion and platelet loss were calculated. The results showed that the leukocyte count after filtration was remarkably lower than that before filtration (p < 0.001), and the rate of leukocyte depletion was 99.97%. Platelet loss was approximately 8%, and obviously lower than that of the national standard (p < 0.001). MPV, pH value, K(+) and LDH concentration were not significantly different before and after filtration. Compared with platelets before filtration, CD62p expression level after filtration slightly decreased (p > 0.05). CD62p expression on surface of platelet membrane in perfusion fluid obtained from filter plate was obviously higher than that before filtration (p < 0.05). MA of platelet after filtration slightly decreased (p > 0.05). It is concluded that leukocyte and partial activated platelets can be removed efficiently by using polyester flatbed filters, and platelet loss is very low. Filtration does not adversely affect coagulation activity of the platelets in vitro. Apheresis platelets after filtration can fulfil quality requirements to prevent infection of cytomegalovirus and HLA alloimmunization.
Filtration ; Humans ; Leukapheresis ; instrumentation ; Platelet Count ; Plateletpheresis ; instrumentation ; methods

Purpose: Long-term culture- initiating cells(LTC-IC) are stem cells that have the capacities of long-term engraftment and helping to establish hematopoietic microenvironment. For evaluation of the LTC-IC, we measured the counts and function with multidimentional flowcytometry in long-term culture media. METHODS: Samples were obtained from umbilical cord blood, leukapheresis products and bone marrow(BM). LTC-IC were counted with flowcytometric analysis using anti- CD34, anti-CD38, and anti-HLA-DR antibodies at 0, 5, and 8 weeks. Cell adhesion molecule related with stem cell were evaluated with flowcytometric analysis also using anti-VCAM-1(CD106) and anti-VLA-4(CD49d) at 0 and 8 weeks. RESULTS: The proportion of CD34+/CD38- cell from fractionated mononuclear cells at 0 week were 0.46%, 0.044%, and 0.038% for BM, leukapheresis products, and umbilical cord blood respectively and then rapidly decreased at 5 weeks, but still persisted at 8 weeks in all three groups. The proportion of CD34+/HLA-DR- cells was the same tendency to CD34+/CD38-. VCAM+ expression rate from fractionated CD34+ cells at 0 and 8 weeks were 67.3% and 40.2% for BM and 64.1% 44.2% for umbilical cord blood but it was very low 31.2% and 5.1% for leukapheresis products. VLA-4+ expression rate for fractionated CD34+ cells at 0 and 8 weeks were similar tendency to VCAM+ cells. CONCLUSION: This study suggest that the count of LTC-IC decreased with time but still persisted until 8 weeks. Umbilical cord blood including BM help to establish the hematopoietic microenvironments.
Antibodies ; Cell Adhesion ; Culture Media ; Fetal Blood ; Leukapheresis ; Stem Cells

OBJECTIVE: To improve the collection efficiency of leukapheresis, explore relatively scientific and objective evaluation indicators for collection effect, and observe the effect of high-volume leukapheresis on blood cells and coagulation function. METHODS: A total of 158 times of high-volume leukapheresis were performed on 93 patients with hyperleukocytic leukemia by using continuous flow centrifugal blood component separator. 1/5-1/4 of total blood volume of the patients was taken as the target value of leukocyte suspension for single treatment. In addition, the total number of white blood cells (WBCs) subtracted, value of WBCs reduction, rate of WBCs reduction, decrease value of WBCs count, decrease rate of WBCs count, amount of hemoglobin (Hb) lost, value of Hb lost, decreased value of Hb, total number of platelet (PLT) lost, the value of PLT loss, and decrease value of PLT count were used to comprehensively evaluate the collection effect of leukapheresis and influence on Hb level and PLT count of the patients. The prothrombin time (PT), activated partial thromboplastin time (aPTT), thrombin time (TT), and fibrinogen (Fib) concentration were detected before and after treatment, and the effect of leukapheresis on coagulation function of the patients was observed. RESULTS: The volume of leukocyte suspension collected in a single treatment was 793.01±214.23 ml, the total number of WBCs subtracted was 353.25 (241.99-547.28)×10⁹, the value of WBCs reduction was 86.98 (63.05-143.43)×10⁹/L, the rate of WBCs reduction was 44.24 (28.37-70.48)%, decrease value of WBCs count was 65.73 (37.17-103.97)×10⁹/L, decrease rate of WBCs count was (35.67±23.08)%, the amount of Hb lost was 17.36 (12.12-24.94) g, the value of Hb lost was 4.31 (3.01-6.12) g/L, decreased value of Hb was 4.80 (-1.25-9.33) g/L, total number of PLT lost was 222.79 (67.03-578.31)×10⁹, the value of PLT loss was 54.45 (17.29-139.08)×10⁹/L, and decrease value of PLT count was 26.00 (8.38-62.50)×10⁹/L. Before and after a single treatment, the PT was 14.80 (13.20-16.98) s and 15.20 (13.08-16.90) s (z=-1.520, P>0.05), the aPTT was 35.20 (28.68-39.75) s and 35.40 (28.00-39.75) s (z=-2.058, P<0.05), the TT was 17.50 (16.30-18.80) s and 17.70 (16.70-19.10) s (z=-3.928, P<0.001), and the Fib concentration was 2.87±1.13 g/L and 2.64±1.03 g/L (t=7.151, P<0.001), respectively. CONCLUSION High-volume leukapheresis can improve the efficiency of leukapheresis while maintaining the relative stability of the patients' circulating blood volume. The degree of influence on the patients' Hb level, PLT count, Fib concentration, and comprehensive coagulation indicators reflecting the patients' intrinsic and cxtrinsic coagulation activity is within the body's compensation range.
Blood Coagulation Tests ; Fibrinogen ; Hemoglobins ; Humans ; Leukapheresis ; Leukemia

BACKGROUND: Dendritic cells (DCs) are the most potent stimulators of immune response including antitumor response. DCs are currently being pursued clinically in the development of cancer vaccines; therefore there are demands for large-scale and clinical-grade generation of DCs. In the present study, to find out the most efficient separation method of DC precursors, we compared two separation methods, namely, based on magnetic based selection and plastic adherence selection. METHODS: MNCs were collected by leukapheresis from healthful donors and separated by CD14 + immunomagnetic adsorption or plastic adherence. DC precursors separated using the two methods were differenciated in the same condition. Matured DCs were compared in terms of yield, viability, the expression of surface markers and ability to induce immune reaction. RESULTS: This study demonstrated that mature DCs from CD14 + monocytes separated using CD14 + immunomagnetic adsorption had higher expression of surface markers of DCs, yield (1.9 +/-0.5% vs. 0.5 +/-0.2%), viability (94.7 +/-2.5% vs. 72.8 +/-7.5%) and better functionality in inducing immune reaction than those from plastic adherent cells. CONCLUSION: These results demonstrated that CD14 + immunomagnetic adsorption was found to be more effective than the adherent selection for the generation of DCs. This study will allow researcher to facilitate choosing the appropriate protocol to obtain DCs.
Adsorption* ; Cancer Vaccines ; Dendritic Cells* ; Humans ; Leukapheresis ; Monocytes* ; Plastics ; Tissue Donors

BACKGROUND/AIMS: Cytapheresis (CAP) is a novel strategy for ulcerative colitis (UC). However, there is insufficient data on the long-term outcome of UC patients who achieve remission by CAP. This study involved patients with severe UC who refracted to intravenous (iv) corticosteroid. METHODS: Forty-seven UC patients who had received CAP therapy for the first time within 1 year after UC diagnosis were followed for 36 months. One of the inclusion criteria was a clinical activity index (CAI) of > or =7 points at the end of a 2-week iv course of corticosteroid therapy. CAP therapy consisted of ten sessions over 10 weeks. RESULTS: CAP induced clinical remission (CAI< or =4) in 70.2% patients (33/47). The number of submissions for colectomy was higher for severe UC at entry (CAI> or =12, n=25) than for moderately severe UC at entry (7< or =CAI<12, p=15; p<0.02). The cumulative rates of avoiding surgery and relapse were 54.5% and 24.2%, respectively, at 36 months in patients who responded to CAP therapy. This was similar to that of iv cyclosporine reported recently. CONCLUSIONS: This study suggest that CAP is an effective therapy in patients who are refractory to conventional medications including iv corticosteroid. Increased remission rates should be expected in refractory patients with moderately severe UC.
Cohort Studies ; Colectomy ; Colitis, Ulcerative ; Cyclosporine ; Cytapheresis ; Humans ; Inflammatory Bowel Diseases ; Leukapheresis ; Recurrence ; Retrospective Studies ; Ulcer