An expanded hypothesis: The role of ascorbate and glucose in the intracellular processes and immunobiology of Ebola virus haemorrhagic fever
The opposing effects of glucose and ascorbate transport on physiological processes may help explain Ebola virus disease pathophysiology. The virus impairs intracellular interferon (IFN) signalling. High plasma glucose levels contribute to oxidative stress and may also inhibit IFN signalling. Conversely, ascorbate may counteract the virus-mediated IFN blockade and interfere with viral budding. Dysregulation of glucose and ascorbate homeostasis may contribute to the pathophysiology of Ebola virus haemorrhagic fever by promoting oxidative stress, activation of the nuclear factor kappa B (NF-κB) pathway, and a cytokine storm. Hyperglycaemia commonly occurs in critically ill patients with Ebola virus haemorrhagic fever. Therefore, haemorrhagic fever syndrome could be understood as a state of oxidative stress driven by hyperglycaemia, NF-κB pathway activation, and inflammatory cytokines. A potential treatment strategy would focus on administering ascorbate and glutathione, together with glucose or insulin as appropriate, to maintain normal, stable plasma glucose levels and combat oxidative and inflammatory stress.
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