Platelet glycolytic flux increases stimulated by ultraviolet-induced stress is not the direct cause of platelet morphology and activation changes: possible implications for the role of glucose in platelet storage.
BACKGROUND
Stress-enhanced platelet (PLT) storage lesions include increased glycolysis, discoid-to-sphere morphology change, and spontaneous PLT activation. It is not clear if reduction in glycolysis can alleviate storage lesion development.


METHODS
Apheresis PLT concentrates were exposed to 17.2 J/mL UV light and 50 microM riboflavin, followed by storage with various concentrations of 2-deoxyglucose (2-DOG) for 5 days. The control had no UV or 2-DOG exposure.


RESULTS
Lactate production and glucose consumption were increased significantly to 0.1371 +/- 0.0281 and 0.0724 +/- 0.0151 mmol per 10(12) cells per hour for UV-treated PLTs, respectively, when compared to control samples. UV treatment induced a decline in pH to 6.55 +/- 0.26 for treated PLTs on Day 5, hypotonic shock response (HSR) 33 +/- 25 percent, extent of shape change (ESC) to 3.8 +/- 3.6 percent, swirl 1.0 +/- 1.0 and increased P-selectin expression 85.2 +/- 9.4 percent. Addition of 2-DOG up to 20 mmol per L significantly reduced lactate production to 0.0515 +/- 0.0045 mmol per 10(12) cells per hour (p < 0.05) and glucose consumption to 0.0293 +/- 0.0060 mmol per 10(12) cells per hour and increased pH to 7.35 +/- 0.09 in a dose-dependent manner. 2-DOG, however, had no effects on HSR, ESC, swirl, and P-selectin expression. Furthermore, an exaggeration of UV-stressed PLT aggregation by addition of 2-DOG was also observed.


CONCLUSIONS
Increased glycolytic flux is not a direct cause for PLT morphology change and spontaneous activation during storage lesion development. Reduction of glucose utilization may increase PLT loss during storage.
Li
Junzhi
J
Navigant Biotechnologies, Inc., Lakewood, CO 80215, USA.
Goodrich
Laura
L
Hansen
Eric
E
Edrich
Rick
R
Gampp
Deanna
D
Goodrich
Raymond P
RP
D001786:Blood Glucose / Q000378:metabolism*; D001792:Blood Platelets / Q000187:drug effects / Q000378:metabolism* / Q000473:pathology*; D001793:Blood Preservation / Q000009:adverse effects*; D003847:Deoxyglucose / Q000008:administration & dosage / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D006019:Glycolysis / Q000187:drug effects / Q000528:radiation effects*; D006801:Humans; D009994:Osmolar Concentration; D015539:Platelet Activation / Q000187:drug effects / Q000528:radiation effects*; D011832:Radiation Injuries / Q000473:pathology / Q000503:physiopathology; D013312:Stress, Physiological / Q000473:pathology / Q000503:physiopathology; D014466:Ultraviolet Rays / Q000009:adverse effects*
D001786:Blood Glucose; D003847:Deoxyglucose