Title

The Expression Of Prion Protein (PrpC) In The Megakaryocyte Lineage

Keywords

Cd34 cells +; Megakaryocytes; Platelets; Prion protein; Variant creutzfeldt-jacob disease

Abstract

Background: Cellular prion protein (PrPC) is a naturally occurring protein in normal individuals which adopts an abnormal conformation, termed scrapie prion protein (PrPSc) that is associated with disease. There is great concern that clinically asymptomatic variant Creutzfeldt-Jacob disease (vCJD) may transmit PrPSc in blood transfusion products. PrPC is widely expressed and has been found in human blood. The majority of cellular borne PrPC is associated with platelets (84%). Although PrPC mRNA has been demonstrated in platelets, the quantity is unknown and may not reflect the total PrPC present. Objective: To investigate the expression of PrPC in the megakaryocyte lineage. Methods: The expression of PrPC was studied in CD34+ cells, cultured megakaryocytes and platelets using electron microscopy, flow cytometry, semi-quantitative RT-PCR and immunofluorescence confocal microscopy. Results and conclusions: The expression of PrPC appeared to increase with differentiation and polyploidization in the megakaryocyte lineage. PrP C was located within platelet α-granules and its source is likely to be from megakaryocyte precursors. If PrPSc has a similar distribution, these results have implications for the selection of blood donors and preparation of cell-depleted blood products. © 2005 International Society on Thrombosis and Haemostasis.

Publication Date

1-1-2005

Publication Title

Journal of Thrombosis and Haemostasis

Volume

3

Issue

6

Number of Pages

1266-1273

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1111/j.1538-7836.2005.01343.x

Socpus ID

24944553749 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/24944553749

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