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Stored RBC metabolism as a function of caffeine levels
Author(s) -
D'Alessandro Angelo,
Fu Xiaoyun,
Reisz Julie A.,
Kanias Tamir,
Page Grier P.,
Stone Mars,
Kleinman Steve,
Zimring James C.,
Busch Michael
Publication year - 2020
Publication title -
transfusion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.045
H-Index - 132
eISSN - 1537-2995
pISSN - 0041-1132
DOI - 10.1111/trf.15813
Subject(s) - caffeine , xanthine , theobromine , pentose phosphate pathway , chemistry , biochemistry , glutathione , metabolism , red blood cell , purine , antioxidant , metabolic pathway , oxidative phosphorylation , glycolysis , paraxanthine , pharmacology , biology , endocrinology , enzyme , cytochrome p450 , cyp1a2
BACKGROUND Coffee consumption is extremely common in the United States. Coffee is rich with caffeine, a psychoactive, purinergic antagonist of adenosine receptors, which regulate red blood cell energy and redox metabolism. Since red blood cell (purine) metabolism is a critical component to the red cell storage lesion, here we set out to investigate whether caffeine levels correlated with alterations of energy and redox metabolism in stored red blood cells. STUDY DESIGN AND METHODS We measured the levels of caffeine and its main metabolites in 599 samples from the REDS‐III RBC‐Omics (Recipient Epidemiology Donor Evaluation Study III Red Blood Cell‐Omics) study via ultra‐high‐pressure‐liquid chromatography coupled to high‐resolution mass spectrometry and correlated them to global metabolomic and lipidomic analyses of RBCs stored for 10, 23, and 42 days. RESULTS Caffeine levels positively correlated with increased levels of the main red cell antioxidant, glutathione, and its metabolic intermediates in glutathione‐dependent detoxification pathways of oxidized lipids and sugar aldehydes. Caffeine levels were positively correlated with transamination products and substrates, tryptophan, and indole metabolites. Expectedly, since caffeine and its metabolites belong to the family of xanthine purines, all xanthine metabolites were significantly increased in the subjects with the highest levels of caffeine. However, high‐energy phosphate compounds ATP and DPG were not affected by caffeine levels, despite decreases in glucose oxidation products—both via glycolysis and the pentose phosphate pathway. CONCLUSION Though preliminary, this study is suggestive of a beneficial correlation between the caffeine levels and improved antioxidant capacity of stored red cells.