2010
DOI: 10.1007/s00467-010-1634-7
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Ca2+-Mg2+-dependent ATP-ase activity in hemodialyzed children. Effect of a hemodialysis session

Abstract: In the course of chronic kidney disease (CKD) the intracellular erythrocyte calcium (Cai2+) level increases along with the progression of the disease. The decreased activity of Ca2+-Mg2+-dependent ATP-ase (PMCA) and its endogenous modulators calmodulin (CALM), calpain (CANP), and calpastatin (CAST) are all responsible for disturbed calcium metabolism. The aim of the study was to analyze the activity of PMCA, CALM, and the CANP-CAST system in the red blood cells (RBCs) of hemodialyzed (HD) children and to estim… Show more

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Cited by 5 publications
(6 citation statements)
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References 27 publications
(43 reference statements)
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“…Intracellularly, the defective band‐3 inhibits the activity of voltage‐dependent Ca 2+ channels and the ATP depletion inhibits the activity of Ca 2+ /Mg 2+ ‐dependent ATPase . Deficiency of uremic RBCs in Ca 2+ regulatory proteins , in addition to increased serum levels of parathormone have been associated with cytosolic excess and increased membrane permeability of Ca 2+ , respectively, although the contribution of parathormone has not been verified by others . HD has been reported to ameliorate or have no effect on intracellular calcium levels.…”
Section: Rbcs In Esrdmentioning
confidence: 99%
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“…Intracellularly, the defective band‐3 inhibits the activity of voltage‐dependent Ca 2+ channels and the ATP depletion inhibits the activity of Ca 2+ /Mg 2+ ‐dependent ATPase . Deficiency of uremic RBCs in Ca 2+ regulatory proteins , in addition to increased serum levels of parathormone have been associated with cytosolic excess and increased membrane permeability of Ca 2+ , respectively, although the contribution of parathormone has not been verified by others . HD has been reported to ameliorate or have no effect on intracellular calcium levels.…”
Section: Rbcs In Esrdmentioning
confidence: 99%
“…Deficiency of uremic RBCs in Ca 2+ regulatory proteins , in addition to increased serum levels of parathormone have been associated with cytosolic excess and increased membrane permeability of Ca 2+ , respectively, although the contribution of parathormone has not been verified by others . HD has been reported to ameliorate or have no effect on intracellular calcium levels. Notably, even in cases exhibiting similar intracellular calcium concentration pre‐ and post‐HD, post‐HD plasma causes significantly lower calcium accumulation in control RBCs compared to pre‐HD plasma , supporting the Gafter's hypothesis that a dialyzable component of ESRD plasma triggers Ca 2+ accumulation in uremic RBCs .…”
Section: Rbcs In Esrdmentioning
confidence: 99%
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“…The disturbance of membrane asymmetry that favors PS exposure and subsequent eryptosis is caused by the increase of cytosolic Ca 2+ ( Segawa and Nagata, 2015 ; Pretorius et al, 2016a ). Ca 2+ enters RBC through several ion channels, pumps, and exchangers that transport Ca 2+ through the plasma membrane ( Polak-Jonkisz et al, 2010b ; Brini and Carafoli, 2011 ; Polak-Jonkisz and Purzyc, 2012 ). Several factors such as oxidative stress, energy depletion, or uremic toxins activate Ca 2+ influx into the RBC ( Lang and Lang, 2015 ).…”
Section: Ion Channel Modifications In Eryptosismentioning
confidence: 99%
“…Η ανεπάρκεια των ουραιμικών ερυθροκυττάρων σε ασβεστιο-εξαρτώμενες ρυθμιστικές πρωτεΐνες, όπως η καλμοντουλίνη [187] και τα αυξημένα επίπεδα παραθορμόνης ορού έχουν επίσης συσχετισθεί με περίσσεια ενδοκυττάριων ιόντων Ca 2+ και με αυξημένη διαπερατότητα της μεμβράνης σε ιόντα Ca 2+ [188]. Παρόλα αυτά, υπάρχουν και μελέτες στις οποίες η συγκέντρωση των ενδοκυττάριων ιόντων ασβεστίου δε σχετίζεται με τα επίπεδα παραθορμόνης ορού [187].…”
Section: σήματοδότηση απομάκρυνσης των κυττάρων από την κυκλοφορίαunclassified