MONITORING THE FUNCTIONAL PROPERTIES OF HUMAN RED BLOOD CELLS BY MICROWAVE WAVEGUIDE SINGLE-FREQUENCY DIELECTROMETRY

2011 ◽  
Vol 70 (6) ◽  
pp. 547-552 ◽  
Author(s):  
K. A. Arkhypova
1990 ◽  
Vol 265 (27) ◽  
pp. 16035-16038 ◽  
Author(s):  
P Bütikofer ◽  
Z W Lin ◽  
D T Chiu ◽  
B Lubin ◽  
F A Kuypers

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Ratnasekhar Ch ◽  
Guillaume Rey ◽  
Sandipan Ray ◽  
Pawan K. Jha ◽  
Paul C. Driscoll ◽  
...  

AbstractCircadian clocks coordinate mammalian behavior and physiology enabling organisms to anticipate 24-hour cycles. Transcription-translation feedback loops are thought to drive these clocks in most of mammalian cells. However, red blood cells (RBCs), which do not contain a nucleus, and cannot perform transcription or translation, nonetheless exhibit circadian redox rhythms. Here we show human RBCs display circadian regulation of glucose metabolism, which is required to sustain daily redox oscillations. We found daily rhythms of metabolite levels and flux through glycolysis and the pentose phosphate pathway (PPP). We show that inhibition of critical enzymes in either pathway abolished 24-hour rhythms in metabolic flux and redox oscillations, and determined that metabolic oscillations are necessary for redox rhythmicity. Furthermore, metabolic flux rhythms also occur in nucleated cells, and persist when the core transcriptional circadian clockwork is absent in Bmal1 knockouts. Thus, we propose that rhythmic glucose metabolism is an integral process in circadian rhythms.


2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Diego Sbardella ◽  
Grazia Raffaella Tundo ◽  
Luisa Campagnolo ◽  
Giuseppe Valacchi ◽  
Augusto Orlandi ◽  
...  

An amendment to this paper has been published and can be accessed via a link at the top of the paper.


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