2021
DOI: 10.3389/fmolb.2021.697359
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NAD+ Degrading Enzymes, Evidence for Roles During Infection

Abstract: Declines in cellular nicotinamide adenine dinucleotide (NAD) contribute to metabolic dysfunction, increase susceptibility to disease, and occur as a result of pathogenic infection. The enzymatic cleavage of NAD+ transfers ADP-ribose (ADPr) to substrate proteins generating mono-ADP-ribose (MAR), poly-ADP-ribose (PAR) or O-acetyl-ADP-ribose (OAADPr). These important post-translational modifications have roles in both immune response activation and the advancement of infection. In particular, emergent data show v… Show more

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Cited by 17 publications
(13 citation statements)
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References 282 publications
(325 reference statements)
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“…There are nuclear receptors that activate NAD + . These transcription factors regulate the expression of genes involved in NAD + biosynthesis or consumption (41)(42). NAD + is a cofactor for various enzymatic reactions and a substrate for NAD + -dependent enzymes such as sirtuins, poly-ADP-ribose polymerases, and cyclic ADP-ribose (cADPR) synthases.…”
Section: Resultsmentioning
confidence: 99%
“…There are nuclear receptors that activate NAD + . These transcription factors regulate the expression of genes involved in NAD + biosynthesis or consumption (41)(42). NAD + is a cofactor for various enzymatic reactions and a substrate for NAD + -dependent enzymes such as sirtuins, poly-ADP-ribose polymerases, and cyclic ADP-ribose (cADPR) synthases.…”
Section: Resultsmentioning
confidence: 99%
“…Excessive consumption of NAD+ damages cellular attempts to maintain homeostasis. During immune challenge, activation of NAD+ degrading enzymes serve as a fundamental driver of NAD+ depletion (Tan & Doig, 2021). For example, Herpes simplex virus 1 infection triggers multiple changes in the metabolism of host cells, including a dramatic decrease in the levels of NAD+ (Grady, Hwang, Vastag, Rabinowitz, & Shenk, 2012), while a model coronavirus infection was shown to drive down cellular NAD+ and NADP+ levels in infected cells (Heer et al, 2020).…”
Section: Resultsmentioning
confidence: 99%
“…Ultimately, during the catabolic phase of the SSP, e.g. SARS-CoV-2 related sepsis, quantum biosemiotics phase coherence is thought to fail on multiple scales of time and space, resulting in genomic instability, loss of redox homeostasis, hijacked energy metabolism during infection [11,15,39,251,252], loss of glycosidic anomeric fidelity (e.g. loss of antigenic determinants), immune dysfunction, and a consumptive coagulopathy of the microvasculature [10,[12][13][14] .…”
Section: Preventing the Postulated Catabolic Hydrolytic Phase Of The ...mentioning
confidence: 99%
“…the catabolic, hydrolytic phase of the SSP, would likely occur more readily in patients suffering from subclinical or clinically-marginal scurvy [11,[13][14][15]241] . Moreover, the combination of NAD+ depletion and L-ascorbic acid deficiency is likely to predispose to impaired innate immune response [251,252] . Baseline preinfectious levels of NAD+ and L-AA, along with various other micro-nutrient levels, might result in some observed clinical variability of the temporal component of priming and provocation inoculations of the SSP.…”
Section: Preventing the Postulated Catabolic Hydrolytic Phase Of The ...mentioning
confidence: 99%
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