• SyncroPatch 384

    Next level versatility and flexibility
  • SyncroPatch 384

    True HTS and GigaOhm seals
  • SyncroPatch 384

    Your multi purpose instrument
  • SyncroPatch 384

    Powerful analysis software
  • SyncroPatch 384

    Assay flexibility via high tech
  • SyncroPatch 384

    Heating and cooling of solutions, cells and patch clamp sites

2022 - Altered Ca2+ Homeostasis in Red Blood Cells of Polycythemia Vera Patients Following Disturbed Organelle Sorting during Terminal Erythropoiesis

icon sp96 SyncroPatch 384PE (a predecessor model of the SyncroPatch 384 instrument) Publication in Cells (2022)

Buks R., Dagher T., Rotordam M. G., Alonso D. M., Cochet S., Gautier E-F., Chafey P., Cassinat B., Kiladjian J-J., Becker N., Plo I., Egée S., Nemer W. E.

Cells (2022) doi: 10.3390/cells11010049


Over 95% of Polycythemia Vera (PV) patients carry the V617F mutation in the tyrosine kinase Janus kinase 2 (JAK2), resulting in uncontrolled erythroid proliferation and a high risk of thrombosis. Using mass spectrometry, we analyzed the RBC membrane proteome and showed elevated levels of multiple Ca2+ binding proteins as well as endoplasmic-reticulum-residing proteins in PV RBC membranes compared with RBC membranes from healthy individuals. In this study, we investigated the impact of JAK2V617F on (1) calcium homeostasis and RBC ion channel activity and (2) protein expression and sorting during terminal erythroid differentiation. Our data from automated patch-clamp show modified calcium homeostasis in PV RBCs and cell lines expressing JAK2V617F, with a functional impact on the activity of the Gárdos channel that could contribute to cellular dehydration. We show that JAK2V617F could play a role in organelle retention during the enucleation step of erythroid differentiation, resulting in modified whole cell proteome in reticulocytes and RBCs in PV patients. Given the central role that calcium plays in the regulation of signaling pathways, our study opens new perspectives to exploring the relationship between JAK2V617F, calcium homeostasis, and cellular abnormalities in myeloproliferative neoplasms, including cellular interactions in the bloodstream in relation to thrombotic events.

Download here

Back to Overview

We use cookies on our website. Some of them are essential for the operation of the site, while others help us to improve this site and the user experience (tracking cookies). You can decide for yourself whether you want to allow cookies or not. Please note that if you reject them, you may not be able to use all the functionalities of the site.