PMCC PMCC

Search tips
Search criteria

Advanced
Results 1-25 (809)
 

Clipboard (0)
None

Select a Filter Below

Journals
Year of Publication
1.  A living band-aid for epidermolysis bullosa 
Blood Transfusion  2015;13(1):1-2.
doi:10.2450/2014.0289-14
PMCID: PMC4317083  PMID: 25636127
2.  Pitfalls in the diagnosis of autoimmune haemolytic anaemia 
Blood Transfusion  2015;13(1):3-5.
doi:10.2450/2014.0252-14
PMCID: PMC4317084  PMID: 25636128
3.  Hepatitis E: an old infection with new implications 
Blood Transfusion  2015;13(1):6-20.
doi:10.2450/2014.0063-14
PMCID: PMC4317085  PMID: 25369613
hepatitis E virus; HEV prevalence; HEV genotype; transfusion-transmitted hepatitis; blood donor
5.  Antibodies to Leptospira among blood donors in higher-risk areas of Australia: possible implications for transfusion safety 
Blood Transfusion  2015;13(1):32-36.
Background
Leptospirosis is one of the most common bacterial zoonoses worldwide, and clinical manifestations range from asymptomatic infection to acute febrile illness, multi-organ failure and death. Asymptomatic, acute bacteraemia in a blood donor provides a potential for transfusion-transmission, although only a single such case from India has been recorded. Human leptospirosis is uncommon in developed countries; however, the state of Queensland in Australia has one of the highest rates among developed countries, especially after increased rainfall. This study examined the prevalence of antibodies to Leptospira spp. in blood donors residing in higher-risk areas of Australia, to evaluate the appropriateness of current blood safety guidelines.
Materials and methods
Plasma samples collected from blood donors residing in higher-risk areas of Australia during 2009 and 2011 were included in the study. All samples were tested for the presence of antibodies to 22 leptospiral serovars using the microscopic agglutination test.
Result
No sample had antibody titres suggestive of a current or recent infection, however, seven samples (1.44%, 95% CI: 0.38–2.50%) had titres suggestive of a past infection.
Discussion
This study provides data that may support the appropriateness of current relevant donor selection policies in Australia. Given that the risk profile for leptospirosis is expanding and that the infection is likely to become more prevalent with climate change, this disease may become more of a concern for transfusion safety in the future.
doi:10.2450/2014.0012-14
PMCID: PMC4317087  PMID: 24960651
emerging pathogen; climate; rainfall
6.  Plasma for fractionation in a public setting: cost analysis from the perspective of the third-party payer 
Blood Transfusion  2015;13(1):37-45.
Background
In Italy, within the legal mandate to pursue national self-sufficiency of plasma-derived medical products, the Regions are starting to organise trade to offset imbalances between need and availability. It is, therefore, necessary to determine the full cost to the Regions of plasma collection and handling. Here we report an analysis of plasma production costs in the Department of Transfusion Medicine of Verona Province, Veneto Region.
Materials and methods
Plasma is obtained from voluntary, non-remunerated donors from either whole blood or apheresis donation, and in Verona it is collected, validated and distributed only in Regional Health Service facilities, and then delivered to industry for processing. The amounts and costs of materials and activities needed to collect, produce, validate and distribute plasma were obtained from the Department of Transfusion Medicine. Attributable overhead expenses were assumed at 15% of direct costs. When plasma was collected as part of whole blood or from multi-component apheresis, joint costs (the costs of the common manufacturing process before the separation) were allocated to the plasma based on the tariff for single components, taken as proxy of the willingness to pay for them. In an alternative scenario plasma recovered from whole blood donations was considered a by-product.
Results
The estimated full cost of each valid unit of plasma derived from whole blood, multi-component apheresis, and plasma-apheresis was about € 30, € 73 and € 170, respectively. The estimated total cost per litre of plasma was € 113 for collection from whole blood and € 276 for collection from apheresis. When plasma recovered from whole blood donations was considered a by-product, its cost per litre was estimated to be € 26.
Discussion
Our results suggest that the Italian donor-based system, in addition to its ethical and social values, can supply plasma at an affordable cost, comparable (albeit slightly higher) with costs in other recent analyses.
doi:10.2450/2014.0066-14
PMCID: PMC4317088  PMID: 25636129
plasma collection; blood transfusion medicine; joint costs; non-remunerated voluntary donors
7.  Therapeutic leukapheresis: 9-year experience in a University Hospital 
Blood Transfusion  2015;13(1):46-52.
Background
Hyperleucocytosis is associated with higher morbidity and mortality related to possible development of leucostasis, tumour lysis syndrome and/or disseminated intravascular coagulation. There is insufficient evidence of the need for leukocytapheresis during early treatment of hyperleucocytosis, and its efficiency remains controversial, although leucoreduction is a measure that can prevent adverse events and death. The aim of this study was to analyse the safety and effectiveness of therapeutic leukocytapheresis and its influence on early mortality in our case series, adjusted to independent mortality risk factors described in the literature.
Materials and methods
This was a retrospective review (June 2003–June 2012) of procedures carried out for the treatment of hyperleucocytosis at the Haematology and Haemotherapy Service of Miguel Servet University Hospital. The patients’ data and technical information were prospectively registered for each leukocytapheresis session.
Results
Thirteen patients underwent a total of 27 leukocytapheresis procedures. After an average of two sessions, a statistically significant drop in the initial leucocyte counts was observed (p<0.01), as well as a relevant drop in lactate dehydrogenase levels. The only analytical value statistically related to early mortality in univariate analysis was initial creatinine level greater than 1.2 mg/dL (p=0.012, OR=2.5).
Discussion
Despite the small size and limited homogeneity of our case series, we can conclude that leukocytapheresis is a safe and effective therapeutic measure for leucoreduction in haematological pathologies of any lineage, particularly in patients without acute myeloid leukaemia. Patients with acute myeloid leukaemia had worse outcomes within 6 months of having finished leukocytapheresis sessions, as well as in terms of mean global survival and mean time of mortality. However, global mortality rates were similar in patients with or without acute myeloid leukaemia.
doi:10.2450/2014.0310-13
PMCID: PMC4317089  PMID: 24960648
hyperleucocytosis; leukocytapheresis; leucoreduction; leucostasis
8.  Molecular matching for Rh and K reduces red blood cell alloimmunisation in patients with myelodysplastic syndrome 
Blood Transfusion  2015;13(1):53-58.
Background
Matching for Rh and K antigens has been used in an attempt to reduce antibody formation in patients receiving chronic transfusions but an extended phenotype matching including Fya and Jka antigens has also been recommended. The aim of this study was to identify an efficient transfusion protocol of genotype matching for patients with myelodysplastic syndrome (MDS) or chronic myelomonocytic leukaemia. We also examined a possible association of HLA class II alleles with red blood cell (RBC) alloimmunisation.
Materials and methods
We evaluated 43 patients with MDS undergoing transfusion therapy with and without antibody formation. We investigated antigen-matched RBC units for ABO, D, C, c, E, e, K, Fya, Fyb, Jka, Jkb, S, s, Doa, Dob and Dia on the patients’ samples and on the donor units serologically matched for them based on their ABO, Rh and K phenotypes and presence of antibodies. We also determined the frequencies of HLA-DRB1 alleles in the alloimmunised and non-alloimmunised patients.
Results
Seventeen of the 43 patients had discrepancies or mismatches for multiple antigens between their genotype-predicted profile and the antigen profile of the units of blood serologically matched for them. We verified that 36.8% of patients had more than one RBC alloantibody and 10.5% of patients had autoantibodies. Although we were able to find a better match for the patients in our extended genotyped/phenotyped units, we verified that matching for Rh and K would be sufficient for most of the patients. We also observed an over-representation of the HLA-DRB1*13 allele in the non-alloimmunised group of patients with MDS.
Discussion
In our population molecular matching for C, c, E, e, K was able to reduce RBC alloimmunisation in MDS patients. An association of HLA-DRB1*13 and protection from RBC alloimmunisation should be confirmed.
doi:10.2450/2014.0332-13
PMCID: PMC4317090  PMID: 24960644
blood group antigen; HLA; molecular matching; myelodysplastic syndrome; RBC alloimmunisation
9.  Paternal RHD zygosity determination in Tunisians: evaluation of three molecular tests 
Blood Transfusion  2015;13(1):59-65.
Background
The choice of a molecular test for first intention determination of paternal RHD zygosity, before entering into invasive diagnostics, is important for the management of pregnancies at risk of haemolytic disease of the foetus and newborn related to anti-RhD.
Materials and methods
RHD zygosity was evaluated in 370 RH:1 Tunisian donors by polymerase chain reaction - sequence-specific polymorphism (PCR-SSP) analysis and polymerase chain reaction - restriction fragment length polymorphism (PCR-RFLP) amplification of hybrid Rhesus box and by real time quantitative polymerase chain reaction (RQ-PCR) specific for RHD exon 5. To evaluate the accuracy of molecular tests in the cases of discordant results, the ten exons of RHD and Rhesus boxes were amplified by PCR and sequenced.
Results
Molecular investigations revealed that our 370 donors comprise 193 dizygous and 145 hemizygous individuals and 32 subjects whose zygosity remains unknown. Positive predictive values were higher than 99% for all the methods, reaching 100% for RQ-PCR. Negative predictive values were 83.24%, 87.27% and 98% for PCR-SSP, PCR-RFLP and RQ-PCR respectively. This study also revealed 19 novel Rhesus box polymorphisms and three novel RHD alleles: RHD(Trp185Stop), RHD(Ala176Thr) and RHD(Ile342Ile).
Discussion
RQ-PCR is the most convenient method for first intention determination of paternal RHD zygosity in Tunisians. However, taking into account positive and negative predictive values, PCR-RFLP could be an alternative despite the heterogeneity of Rhesus boxes and the complexity of RHD.
doi:10.2450/2014.0308-13
PMCID: PMC4317091  PMID: 24960665
zygosity; RHD alleles; Rhesus box polymorphisms
10.  Neonatal outcome in alloimmune thrombocytopenia after maternal treatment with intravenous immunoglobulin 
Blood Transfusion  2015;13(1):66-71.
Background
Weekly maternal intravenous immunoglobulin (IVIG) is the cornerstone of antenatal treatment of foetal and neonatal alloimmune thrombocytopenia (FNAIT). The aim of this study was to describe the neonatal outcome and management in neonates with FNAIT treated antenatally with IVIG.
Materials and methods
All neonates treated antenatally and delivered at our centre between 2006 and 2012 were included in the study. We assessed the neonatal outcome and management, including the occurrence of intracranial haemorrhage, platelet count at birth and need for postnatal platelet transfusions or postnatal IVIG treatment.
Results
A total of 22 neonates were included of whom 12 (55%) had severe thrombocytopenia at birth (platelet count ≤50×109/L). Most neonates (67%, 8/12) with severe thrombocytopenia received a platelet transfusion after birth. None of the neonates required postnatal treatment with IVIG. Three neonates had petechiae and haematomas, without clinical consequences. One foetus suffered from intracranial haemorrhage, which was detected just before the planned start of antenatal IVIG at 28 weeks’ gestation.
Discussion
Our results suggest that antenatal maternal IVIG and, if necessary, postnatal matched platelet transfusions, are effective and safe for the treatment of FNAIT.
doi:10.2450/2014.0309-13
PMCID: PMC4317092  PMID: 24960663
alloimmune thrombocytopenia; neonatal; intravenous immunoglobulin; intracranial haemorrhage
11.  Variant RH alleles and Rh immunisation in patients with sickle cell disease 
Blood Transfusion  2015;13(1):72-77.
Background
Alloimmunisation is a major complication in patients with sickle cell disease (SCD) receiving red blood cell (RBC) transfusions and despite provision of Rh phenotyped RBC units, Rh antibodies still occur. These antibodies in patients positive for the corresponding Rh antigen are considered autoantibodies in many cases but variant RH alleles found in SCD patients can also contribute to Rh alloimmunisation. In this study, we characterised variant RH alleles in 31 SCD patients who made antibodies to Rh antigens despite antigen-positive status and evaluated the clinical significance of the antibodies produced.
Materials and methods
RHD and RHCE BeadChip™ from BioArray Solutions and/or amplification and sequencing of exons were used to identify the RH variants. The serological features of all Rh antibodies in antigen-positive patients were analysed and the clinical significance of the antibodies was evaluated by retrospective analysis of the haemoglobin (Hb) levels before and after transfusion; the change from baseline pre-transfusion Hb and the percentage of HbS were also determined.
Results
We identified variant RH alleles in 31/48 (65%) of SCD patients with Rh antibodies. Molecular analyses revealed the presence of partial RHD alleles and variant RHCE alleles associated with altered C and e antigens. Five patients were compound heterozygotes for RHD and RHCE variants. Retrospective analysis showed that 42% of antibodies produced by the patients with RH variants were involved in delayed haemolytic transfusion reactions or decreased survival of transfused RBC.
Discussion
In this study, we found that Rh antibodies in SCD patients with RH variants can be clinically significant and, therefore, matching patients based on RH variants should be considered.
doi:10.2450/2014.0324-13
PMCID: PMC4317093  PMID: 24960646
sickle cell disease; RH alleles; Rh alloimmunisation; RHD and RHCE variants
12.  Molecular typing for the Indian blood group associated 252G>C single nucleotide polymorphism in a selected cohort of Australian blood donors 
Blood Transfusion  2015;13(1):78-85.
Background
The Indian blood group antigens, Ina and Inb, are clinically significant in transfusion medicine. However, antisera to type these antigens are difficult to obtain. The Inb antigen is a high frequency antigen present in all populations, while the frequency of the antithetical Ina ranges from 0.1% in Caucasians up to 11% in Middle Eastern groups. This antigen polymorphism is encoded by the single nucleotide polymorphism (SNP) 252G>C in CD44. The aim of this study was to establish and compare two genotyping methods to measure the frequency of the IN*A and IN*B alleles in a blood donor cohort.
Materials and methods
Donor blood samples (n=151) were genotyped by a novel real-time polymerase chain reaction (PCR) high-resolution meltcurve (HRM) analysis and a custom matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry (MALDI-TOF MS) assay. Samples with the rare IN*A allele were further investigated by nucleotide sequencing, red cell agglutination, and flow cytometry techniques.
Results
In this study group, 149 IN*B homozygous and 2 IN*A/B heterozygous samples were detected with 100% concordance between HRM and MALDI-TOF MS methods. For PCR HRM, amplicon melting alone did not differentiate IN*A and IN*B alleles (class 3 SNP), however, the introduction of an unlabelled probe (UP) increased the resolution of the assay. Sequencing confirmed that the two non-homozygous samples were IN*A/B heterozygous and phenotyping by red cell agglutination, and flow cytometry confirmed both Ina and Inb antigens were present as predicted.
Discussion
Genotyping permits conservation of rare antisera to predict blood group antigen phenotype. In PCR UP-HRM the IN*A and IN*B alleles were discriminated on the basis of their melting properties. The Ina frequency in this selected donor population was 1.3%. Application of genotyping methods such as these assists in identifying donors with rare blood group phenotypes of potential clinical significance.
doi:10.2450/2014.0336-13
PMCID: PMC4317094  PMID: 24960658
Indian blood group genotyping; high-resolution melting analysis; MALDI-TOF MS
13.  The Australian and New Zealand Haemostasis Registry: ten years of data on off-licence use of recombinant activated factor VII 
Blood Transfusion  2015;13(1):86-99.
Background
Recombinant activated factor VII (rFVIIa) has been widely used as an off-licence pan-haemostatic agent in patients with critical bleeding. However, outside the trauma setting, there is relatively little high quality evidence on the risks and benefits of this agent. The Haemostasis Registry was established to investigate the extent of use, dosing, safety and outcomes of patients after off-licence rFVIIa treatment of critical bleeding.
Materials and methods
The Registry recruited non-haemophiliac patients treated with rFVIIa from 2000–2009 (inclusive) in Australia and New Zealand. Detailed information was gathered on patients’ demographics, context of bleeding, rFVIIa administration, laboratory results, blood component and other therapies, and outcomes. Outcome measures included subjectively assessed effect of rFVIIa on bleeding (response), adverse events (thromboembolic and other) and 28-day mortality.
Results
The registry included 3,446 cases in 3,322 patients (median [IQR] age 56 [33–70] years, 65% (n=2,147) male). Clinical indications included cardiac surgery (45%), other surgery (18%), trauma (13%), medical bleeding (6%), liver disease (6%), and obstetric haemorrhage (5%). The median [IQR] dose was 91 [72–103] μg/kg and 77% received a single dose. Reduction or cessation of bleeding was reported in 74% and 28-day survival was 71% but outcomes varied depending on clinical context. pH strongly correlated with outcome measures; 81% of patients with pH <7.1 died. Approximately 11% of patients had thromboembolic adverse events. In multivariate analysis, pH prior to administration and bleeding context were independently associated with reported response to rFVIIa and 28-day mortality.
Discussion
The Haemostasis Registry is the largest dataset of its kind and provides observational data on the off-licence use of rFVIIa over a 10-year period. It has been an invaluable resource for rigorously tracking adverse events and helping to inform clinical practice.
doi:10.2450/2014.0260-13
PMCID: PMC4317095  PMID: 24960661
Haemostasis Registry; rFVIIa; NovoSeven®; critical bleeding; haemostasis
14.  Angiopoietins in haematopoietic stem cell mobilisation in patients with haematological malignancies 
Blood Transfusion  2015;13(1):102-108.
Background
The bone marrow niche contains different types of cells including osteoblasts and endothelial progenitors, all of which interact and take part in the process of mobilisation. The aim of our study was to evaluate the levels of cytokines (osteopontin and angiopoietins 1 and 2) active in the bone marrow niche during the mobilisation of haematopoietic stem cells for autologous transplantation.
Materials and methods
Forty-eight patients (24 females, 24 males), median age 56.5 years, entered the study. The group consisted of patients with multiple myeloma (n=34), lymphoma (n=13) and acute myeloid leukaemia (n=1). Blood samples were collected before chemotherapy and on the day of the first apheresis. Cytokines were evaluated by enzyme-linked immunosorbent assays. Additionally, circulating endothelial cells were assessed by flow cytometry.
Results
The median concentration of angiopoietin 1 at the time of apheresis was lower than that at baseline (2.7 vs 7.8 ng/mL, p<0.001). In contrast, the median level of angiopoietin 2 increased during the mobilisation procedure (3.6 vs 2.8 ng/mL, p=0.001). The patients were divided according to the number of days of granulocyte colony-stimulating factor treatment before the first apheresis into “early” (median) mobilisers. The group of “early mobilisers” had higher baseline angiopoietin 1 levels (median=11.6 ng/mL) than those of the “late mobilisers” (median=6.0 ng/mL, p=0.05). An adverse correlation was observed between duration of granulocyte colony-stimulating factor treatment and baseline angiopoietin 1 level. Baseline angiopoietin 1 levels correlated with numbers of circulating endothelial cells. Low angiopoietin 2 level increased the chance of poor mobilisation.
Conclusions
The angiogenic processes can influence the timing of mobilisation. Angiopoietins 1 and 2 need further evaluation in the context of mobilisation.
doi:10.2450/2014.0002-14
PMCID: PMC4317096  PMID: 25369606
angiopoietin; osteopontin; mobilisation of haematopoietic stem cells
16.  Serodetection of Dengue virus and its antibodies among blood donors in the western region of Saudi Arabia: a preliminary study 
Blood Transfusion  2015;13(1):135-138.
doi:10.2450/2014.0134-14
PMCID: PMC4317098  PMID: 25369603
Dengue virus; Saudi Arabia; blood donors; seroprevalence
18.  Structural modification of H histo-blood group antigen 
Blood Transfusion  2015;13(1):143-149.
doi:10.2450/2014.0033-14
PMCID: PMC4317100  PMID: 25369604
19.  To the rescue: the role of intravenous iron in the management of severe anaemia in the peri-partum setting 
Blood Transfusion  2015;13(1):150-152.
doi:10.2450/2014.0220-14
PMCID: PMC4317101  PMID: 25636130
pregnancy; anaemia; haemorrhage; Jehovah’s Witness; intravenous iron
20.  Preliminary evaluation of cord blood platelet gel for the treatment of skin lesions in children with dystrophic epidermolysis bullosa 
Blood Transfusion  2015;13(1):153-158.
doi:10.2450/2014.0160-14
PMCID: PMC4317102  PMID: 25369602
children; cord blood platelet gel; epidermolysis bullosa; paediatric dermatology; platelet gel
25.  Errata Corrige 
Blood Transfusion  2015;13(1):167.
doi:10.2450/2015.0306-14
PMCID: PMC4317107  PMID: 25633878

Results 1-25 (809)