Stormer M.,Paul Ehrlich Institute |
Brachert J.,Paul Ehrlich Institute |
Carrero H.,U.S. Army |
Devine D.,Canadian Blood Service |
And 30 more authors.
Background Bacterial contamination of platelet concentrates (PCs) still remains a significant problem in transfusion with potential important clinical consequences, including death. The International Society of Blood Transfusion Working Party on Transfusion-Transmitted Infectious Diseases, Subgroup on Bacteria, organised an international study on Transfusion-Relevant Bacteria References to be used as a tool for development, validation and comparison of both bacterial screening and pathogen reduction methods. Material and Methods Four Bacteria References (Staphylococcus epidermidis PEI-B-06, Streptococcus pyogenes PEI-B-20, Klebsiella pneumoniae PEI-B-08 and Escherichia coli PEI-B-19) were selected regarding their ability to proliferate to high counts in PCs and distributed anonymised to 14 laboratories in 10 countries for identification, enumeration and bacterial proliferation in PCs after low spiking (0·3 and 0·03CFU/ml), to simulate contamination occurring during blood donation. Results Bacteria References were correctly identified in 98% of all 52 identifications. S. pyogenes and E. coli grew in PCs in 11 out of 12 laboratories, and K. pneumoniae and S. epidermidis replicated in all participating laboratories. The results of bacterial counts were very consistent between laboratories: the 95% confidence intervals were for S. epidermidis: 1·19-1·32×107CFU/ml, S. pyogenes: 0·58-0·69 ×107CFU/ml, K. pneumoniae: 18·71-20·26×107CFU/ml and E. coli: 1·78-2·10×107CFU/ml. Conclusion The study was undertaken as a proof of principle with the aim to demonstrate (i) the quality, stability and suitability of the bacterial strains for low-titre spiking of blood components, (ii) the property of donor-independent proliferation in PCs, and (iii) their suitability for worldwide shipping of deep frozen, blinded pathogenic bacteria. These aims were successfully fulfilled. The WHO Expert Committee Biological Standardisation has approved the adoption of these four bacteria strains as the first Repository for Transfusion-Relevant Bacteria Reference Strains and, additionally, endorsed as a project the addition of six further bacteria strain preparations suitable for control of platelet contamination as the next step of enlargement of the repository. © 2011 The Author(s). Vox Sanguinis © 2011 International Society of Blood Transfusion. Source
Olszanski R.,Institute of Tropical Medicine |
Olszanski R.,Regional Center for Transfusion Medicine |
Radziwon P.,Institute of Tropical Medicine |
Radziwon P.,Regional Center for Transfusion Medicine |
And 14 more authors.
Aviation Space and Environmental Medicine
Introduction: The Doppler technique is currently the usual method for detection of bubbles in the circulation following decompression. However, cases of decompression sickness (DCS) frequently occur in the absence of detectable bubbles, so that other markers for increasing risk of DCS would be welcome. This study assessed the hemostatic effects of compressed-air saturation dives that conformed to the "safe" limits of accepted decompression tables. Methods: We measured coagulation times, thrombin generation, platelets, and fibrinolysis in 21 male divers who were subjected to saturated hyperbaric exposures to 0.28-0.3 MPa (corresponds to 18-20 msw). Each diver did one dive. Results: Pooled before- and after-dive data for all exposures showed after decompression, statistically significant changes included decrease of the mean platelet count after, increased induced platelet aggregation and number of platelet aggregates, increased number of P-selectin (CD62P) positive platelets and CD62P density on platelets, increase of platelet derived microparticles in the blood of the divers, decrease of factor XII, X, and fibrinogen concentrations, and marked increase of plasmin-antiplasmin complex concentration. Thrombin activation markers and coagulation times did not change significantly. Conclusions: Saturated hyperbaric exposures followed by nominally safe decompression led to activation of platelets and the fibrinolytic system. The probable mechanism for the activation of platelets and fibrinolysis is contact with the surface of evolved bubbles in the divers' circulation. © by the Aerospace Medical Association,. Source
Jozwik M.,Medical University of Bialystok |
Okungbowa O.E.,Medical University of Bialystok |
Lipska A.,Regional Center for Transfusion Medicine |
Jozwik M.,University of Warmia and Mazury |
And 6 more authors.
Background: Of many specialized blood cells, monocytes are gaining increasing attention for their role in neoplastic disorders. The purpose of the present investigation was to determine the expression of selected peripheral blood monocyte surface antigens in cases of cervical, endometrial, and ovarian cancers. In addition, our aim was to validate the diagnostic value of two artificial coefficients recently proposed for the diagnosis of gynecologic malignancies: Neutrophil to Lymphocyte Ratio (NLR), and Multiplication of Neutrophil and Monocyte Counts (MNM). Methods: We studied 69 white Caucasian women with histopathologic confirmation of endometrial (N = 42), cervical (N = 13), and ovarian (N = 14) cancers. Reference Group I were women suspected of cancer but histologically nullified (N = 20), and Group II were healthy blood donors (N = 23). Expression of CD11a, CD11b, CD11c, CD16, CD54 (ICAM-1), CD62 L (L-selectin), CD64, and HLA-DR was measured with immunofluorescence in a flow cytometer. Results: CD54 expression increased by ≥35.6% (p < 0.001) whilst HLA-DR decreased by ≥10.8% (p < 0.001) in all cancer subgroups and Group I as compared to blood donors. A correlation (p < 0.05) between CD54 and CD62 L was stronger in all cancers studied than in healthy subjects. There was no difference in the NLR values between any of these subgroups. Moreover, we observed an increase in MNM parameter in cases of cervical and endometrial cancer and in the Reference Group I. Conclusions: In the studied gynecologic malignancies, CD54 expression on peripheral blood monocytes is enhanced, indicating a higher transmigrational potential present in such patients, and HLA-DR expression diminished, indicating a decreased readiness of the immune system to recognize foreign antigens. The more pronounced correlation for the expression of CD54 and CD62 L in cancer suggests that monocytes uptake from the bloodstream and their local adhesion increase the pool of tumor-associated macrophages. This study challenged the suggested credibility and usefulness of the artificial parameters of MNM and NLR for the differential diagnosis of gynecologic malignancies. © 2015 Jozwik et al.; licensee BioMed Central. Source
Ciborowski M.,University of San Pablo - CEU |
Ciborowski M.,Medical University of Bialystok |
Javier Ruperez F.,University of San Pablo - CEU |
Martinez-Alcazar M.P.,University of San Pablo - CEU |
And 6 more authors.
Journal of Proteome Research
Professional and recreational diving are growing activities in modern life. Diving has been associated with increased prevalence of stroke, hypertension, asthma, diabetes, or bone necrosis. We evaluated the effect of increased pressure equivalent to diving at 30 and 60 m for 30 min in two groups of divers using an untargeted approach with LC-MS fingerprinting of plasma. We found over 100 metabolites to be altered in plasma post exposure and after the corresponding decompression procedures. Among them, a group of lysophosphatidylcholines and lysophosphatidylethanolamines were increased, including lysoplasmalogen, a thrombosis promoter, together with changes in metabolic rate-associated molecules such as acylcarnitines and hemolysis-related compounds. Moreover, three metabolites that could be associated to bone degradation show different intensities between experimental groups. Ultimately, this nontargeted, short-term study opens the possibility of discovering markers of long-term effect of pressure that could be employed in routine health control of divers and could facilitate the development of safer decompression procedures. © 2010 American Chemical Society. Source
Ratajczak-Wrona W.,Medical University of Bialystok |
Jablonska E.,Medical University of Bialystok |
Garley M.,Medical University of Bialystok |
Jablonski J.,Medical University of Bialystok |
Radziwon P.,Regional Center for Transfusion Medicine
Indian Journal of Experimental Biology
Potential role of ERK1/2 kinase in conjunction with p38 in the regulation of inducible nitric oxide synthase (iNOS) expression and nitric oxide (NO) production, and superoxide anion generation by human neutrophils (PMNs) exposed to N-nitrosodimethylamine (NDMA) was determined. Increased synthesis of NO due to the involvement of iNOS in neutrophils exposed to NDMA was observed. In addition, intensified activation of ERK1/2 and p38 kinases was determined in these cells. Inhibition of kinase regulated by extracellular signals (ERK1/2) pathway, in contrast to p38 pathway, led to an increased production of NO and expression of iNOS in PMNs. Moreover, as a result of inhibition of ERK1/2 pathway, a decreased activation of p38 kinase was observed in neutrophils, while inhibition of p38 kinase did not affect activation of ERK1/2 pathway in these cells. An increased ability to release superoxide anion by the studied PMNs was observed, which decreased after ERK1/2 pathway inhibition. In conclusion, in human neutrophils, ERK1/2 kinase is not directly involved in the regulation of iNOS and NO production induced by NDMA; however, the kinase participates in superoxide anion production in these cells. Source