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- W4323841755 abstract "Buffy Coats, generated from a blood donor's whole blood bag unit, are commonly used in biomedical research as a source of leukocytes due to the high number of cells that can be recovered from each Buffy Coat. Buffy Coats are leukocyte-enriched residual units obtained by centrifugation of whole blood. At the blood bank, blood can be processed using two different protocols according to the time interval between blood collection and processing. When blood collection and processing occur on the same day, it gives rise to Fresh Blood Buffy Coats. Alternatively, if blood processing only happens on the day after blood collection, Overnight Blood Buffy Coats are created. In this study, we aimed to address whether these two different Buffy Coat-processing protocols could differently impact monocyte function as antigen-presenting cells. For this purpose, we analyzed in the same experiment monocytes isolated from Fresh Blood and from Overnight Blood Buffy Coats. We assessed lipid antigen presentation by CD1d to invariant Natural Killer T (iNKT) cells. CD1d is a non-polymorphic MHC class I-like protein, which facilitates the study of antigen presentation among allogeneic samples. The results show that monocytes from Fresh Blood Buffy Coats have a better capacity to present antigens by CD1d, and consequently to activate iNKT cells, when compared to monocytes from Overnight Blood Buffy Coats. The differences observed were not explained by disparities in monocyte viability, CD1d expression, or basal activation state (monocyte expression of CD40 and CD80). Buffy Coats are a valid source of blood cells available daily. Hence, the type of protocol for Buffy Coat processing should be carefully considered in day-to-day research, since it may lead to different outcomes." @default.
- W4323841755 created "2023-03-11" @default.
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- W4323841755 date "2023-03-09" @default.
- W4323841755 modified "2023-09-30" @default.
- W4323841755 title "Buffy Coat Processing Impacts on Monocytes’ Capacity to Present Lipid Antigens" @default.
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- W4323841755 doi "https://doi.org/10.3390/biomedicines11030833" @default.
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