Canadian Blood Services

Toronto, Canada

Canadian Blood Services

Toronto, Canada
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This disclosure relates to a cellular-based therapies for modulating the level of regulatory T cells (Treg) and/or the level of pro-inflammatory T cells (Th17/Th1). To provide these therapeutic effects, a combination comprising at least one a cellular pro-tolerogenic preparation and at least one a cellular pro-inflammatory preparation are administered sequentially.


Selective testing of donors for Trypanosoma cruzi infection relies on identification of at-risk donors with screening questions. Using risk modeling and a seroprevalence study, we evaluated the risk of questions failing to identify T. cruzi antibody-positive donors. The rate of donors with unreported risk was estimated by a telephone survey of 2677 donors who answered "no" to risk questions. The number of T. cruzi antibody-positive donors missed by risk questions was estimated from the product of this rate and the selective testing T. cruzi antibody-positive rate. The 95% confidence interval (CI) was estimated by Monte Carlo simulation. To test the model, 60,132 donors were tested for T. cruzi antibody (26% of donors in selected regions, Phase I). In Winnipeg, Manitoba, the highest-risk region, 26,915 donors were tested (92.5% of donors, Phase II). In the telephone survey, 21 (0.8%) donors reported risk factors that would have identified them for selective testing. Seven were born in Mexico or Central or South America, five had travel risk, and nine had mother or maternal grandmother risk. The 95% CI for predicted number of T. cruzi antibody-positive donors answering "no" to risk questions was 0.71 to 4.38. In Phase I, one Winnipeg donor confirmed positive but had answered risk questions correctly. No other positive donations were identified. The estimated risk of T. cruzi-positive donors who answer "no" to risk questions is low and is confirmed by the seroprevalence among these donors. © 2013 American Association of Blood Banks.


Patent
Canadian Blood Services | Date: 2014-11-05

A device and method for polymer modification of biological cells includes pumping a first liquid mixture comprising biological cells from a first reservoir to a mixing chamber and a second liquid mixture comprising activated polymer from a second reservoir to the same mixing chamber, independently controlling an output volume of the first and second liquid mixtures pumped into the mixing chamber using at least one pump, mixing the first and second liquid mixtures in the mixing chamber to produce a final mixture comprising polymer-modified biological cells, and evacuating the final mixture comprising polymer-modified biological cells from the mixing chamber into an output reservoir.


Patent
Canadian Blood Services | Date: 2014-06-12

The present disclosure provides a C-terminal tethered amino acid for modulating the thrombolytic, fibrinolytic and/or anticoagulant properties of a coagulation protein. The present disclosure also provides a coagulation protein having a catalytic site modified, either at the histidine or serine residue, with the C-terminal tethered amino acid as well as therapeutic applications of those modified coagulation proteins.


Patent
Canadian Blood Services | Date: 2014-12-17

The present disclosure provides a C-terminal tethered amino acid for modulating the thrombolytic, fibrinolytic and/or anticoagulant properties of a coagulation protein. The present disclosure also provides a coagulation protein having a catalytic site modified, either at the histidine or serine residue, with the C-terminal tethered amino acid as well as therapeutic applications of those modified coagulation proteins.


This invention relates to cellular-based therapies for increasing the level of regulatory T cells (Treg) and/or decreasing the level of pro-inflammatory T cells (Th17) to induce anergy or immune tolerance. To provide these therapeutic effects, two allogeneic leukocyte populations are contacted (in vivo, in vitro or ex vivo) and one of these leukocyte population is modified to bear on its surface a low-immunogenic biocompatible polymer so as to prevent pro-inflammatory allo-recognition. Cellular-based preparations and processes for achieving cellular therapy are also provided.


This invention relates to acellular-based therapies for decreasing the level of regulatory T cells (Treg) and/or increasing the level of pro-inflammatory T cells (Th17) to favor immune stimulation. To provide these therapeutic effects, an allogeneic leukocyte population is contacted with another leukocyte population and the acellular components produced are isolated. The leukocyte populations are contacted so as to allow pro-inflammatory allo-recognition. Acellular-based preparations and processes for achieving therapy are also provided.


RBC and platelet (Plt) alloimmunization requires antigen-matched blood to avoid adverse transfusion reactions. Some blood collection facilities use unregulated Abs to reduce the cost of mass screening, and later confirm the phenotype with government approved reagents. Alternatively, RBC and Plt antigens can be screened by virtue of their associated single nucleotide polymorphisms (SNPs). We developed a multiplex PCR-oligonucleotide extension assay using the GenomeLab SNPStream platform to genotype blood for a plurality of blood group antigen-associated SNPs, including but not limited to: RhD (2), RhC/c, RhE/e, S/s, K/k, Kp^(a/b), Fya/b, FY0, Jk^(a/b), Di^(a/b), and HPA-1a/b.


RBC and platelet (Plt) alloimmunization requires antigen-matched blood to avoid adverse transfusion reactions. Some blood collection facilities use unregulated Abs to reduce the cost of mass screening, and later confirm the phenotype with government approved reagents. Alternatively, RBC and Plt antigens can be screened by virtue of their associated single nucleotide polymorphisms (SNPs). We developed a multiplex PCR-oligonucleotide extension assay using the GenomeLab SNPStream platform to genotype blood for a plurality of blood group antigen-associated SNPs, including but not limited to: RhD (2), RhC/c, RhE/e, S/s, K/k, Kp^(a/b), Fya/b, FY0, Jk^(a/b), Di^(a/b), and HPA-1a/b.


Patent
Canadian Blood Services | Date: 2014-03-12

The present disclosure relates to a compound of formula (I) or a pharmaceutically acceptable salt thereof; wherein U, R1, R2, R3 and Q are as defined herein. The disclosure also provides a method for treating or preventing a method for the prevention, treatment and/or alleviation of one or more autoimmune or alloimmune disease, pharmaceutical compositions and combination comprising a therapeutically effective amount of a compound, as defined herein.

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