Latest IEM Research
We are happy to share our latest work on hereditary xerocytosis (HX), exploring how mechanosensation via Piezo1, a mechanosensitive ion channel, shapes red blood cell (RBC) survival.
Makhro, A., Huisjes, R., Seiler, E., Qiao, M., Bartels, M., Hegemann, I., Eppenberger, P., Bender, N., Dorn, I., Bogdanova, A., van Wijk, R., & Kaestner, L. (2026). Mechanistic Consequences of Piezo1 Gain-of-Function Variants for Decreased Red Cell Survival in Hereditary Xerocytosis. American journal of hematology, 10.1002/ajh.70188. Advance online publication. https://doi.org/10.1002/ajh.70188
We show that altered Piezo1 activity is linked to accelerated RBC clearance, chronic hemolysis, and sustained erythropoietin signaling, providing a mechanistic framework that helps explain the remarkably broad clinical spectrum of HX.
This study highlights how a single mechanosensitive ion channel can connect cellular biomechanics with systemic physiology and disease.
#HereditaryXerocytosis #PIEZO1 #IonChannels #RedBloodCells #Hematology
#Mechanobiology #Erythropoiesis #RareDiseases #TranslationalResearch
#CellBiology #Physiology #BiomedicalResearch
Caption:
Red blood cell turnover, oxygen binding, and erythropoietin signaling in hereditary xerocytosis (HX).
(A) Representative gel electrophoresis illustrating the Band 4.1a/4.1b ratio, a molecular marker of red blood cell (RBC) age.
(B) Relationship between the Band 4.1a/4.1b ratio and reticulocyte counts in HX patients compared with healthy controls and sickle cell disease patients.
(C–D) Erythropoietin (EPO) levels show no significant association with reticulocyte counts or average RBC age in HX.
(E) Oxygen dissociation curves demonstrate a significant left shift in HX patients compared with controls across the physiologically relevant oxygen range (8–58 mmHg).
(F) P50 values do not correlate with EPO levels in HX.
