Amyloid beta peptide (1-42)-mediated antioxidant imbalance is associated with activation of protein kinase C in red blood cells

2015 ◽  
Vol 33 (4) ◽  
pp. 196-201 ◽  
Author(s):  
Cristiana Carelli-Alinovi ◽  
Bruno Giardina ◽  
Francesco Misiti
Transfusion ◽  
2017 ◽  
Vol 57 (11) ◽  
pp. 2690-2700 ◽  
Author(s):  
Christopher C. Silliman ◽  
Marguerite R. Kelher ◽  
Samina Y. Khan ◽  
F. Bernadette West ◽  
Nathan J.D. McLaughlin ◽  
...  

Blood ◽  
2002 ◽  
Vol 100 (9) ◽  
pp. 3392-3399 ◽  
Author(s):  
Dina A. Andrews ◽  
Lu Yang ◽  
Philip S. Low

AbstractCalcium entry into mature erythrocytes (red blood cells; RBCs) is associated with multiple changes in cell properties. At low intracellular Ca2+, efflux of potassium and water predominates, leading to changes in erythrocyte rheology. At higher Ca2+ content, activation of kinases and phosphatases, rupture of membrane-to-skeleton bridges, stimulation of a phospholipid scramblase and phospholipase C, and induction of transglutaminase-mediated protein cross-linking are also observed. Because the physiologic relevance of these latter responses depends partially on whether Ca2+ entry involves a regulated channel or nonspecific leak, we explored mechanisms that initiate controlled Ca2+ influx. Protein kinase C (PKC) was considered a prime candidate for the pathway regulator, and phorbol-12 myristate-13 acetate (PMA), a stimulator of PKC, was examined for its influence on erythrocyte Ca2+. PMA was found to stimulate a rapid, dose-dependent influx of calcium, as demonstrated by the increased fluorescence of an entrapped Ca2+-sensitive dye, Fluo-3/am. The PMA-induced entry was inhibited by staurosporine and the PKC-selective inhibitor chelerythrine chloride, but was activated by the phosphatase inhibitors okadaic acid and calyculin A. The PMA-promoted calcium influx was also inhibited by ω-agatoxin-TK, a calcium channel blocker specific for Cav2.1 channels. To confirm that a Cav2.1-like calcium channel exists in the mature erythrocyte membrane, RBC membrane preparations were immunoblotted with antiserum against the α1A subunit of the channel. A polypeptide of the expected molecular weight (190 kDa) was visualized. These studies indicate that an ω-agatoxin-TK–sensitive, Cav2.1-like calcium permeability pathway is present in the RBC membrane and that it may function under the control of kinases and phosphatases.


Biochemistry ◽  
2002 ◽  
Vol 41 (41) ◽  
pp. 12562-12567 ◽  
Author(s):  
Kitty de Jong ◽  
Michael P. Rettig ◽  
Philip S. Low ◽  
Frans A. Kuypers

1998 ◽  
Vol 166 (2) ◽  
pp. 119-132 ◽  
Author(s):  
D.B. Light ◽  
M.R. Adler ◽  
J.K. Ter Beest ◽  
S.A. Botsford ◽  
R.T. Gronau

2021 ◽  
Vol 135 ◽  
pp. 104124
Author(s):  
Elif Ugurel ◽  
Zeynep Busra Kisakurek ◽  
Yasemin Aksu ◽  
Evrim Goksel ◽  
Neslihan Cilek ◽  
...  

1999 ◽  
Vol 49 (1) ◽  
pp. 113-120 ◽  
Author(s):  
Kanako SAKASHITA ◽  
Tadahiro OONISHI ◽  
Noriaki ISHIOKA ◽  
Nobuhiro UYESAKA

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