Cited by 200Vitamin C and Antioxidants ResearchRedox biology and oxidative stressAntioxidant Activity and Oxidative Stress

Ascorbate recycling in human erythrocytes: Role of GSH in reducing dehydroascorbate

May, James M., Qu, Zhi-Chao, Whitesell, Richard R., Cobb, Charles E.·1996·Free Radical Biology and Medicine

Abstract

Human erythrocytes regenerate ascorbate from its oxidized product, dehydroascorbate. The extent to which such ascorbate recycling occurs by a GSH-dependent mechanism was investigated. In the presence of glucose, erythrocytes took up over 90% of extracellular [14C]dehydroascorbate and rapidly converted it to [14C]ascorbate, which was trapped within the cells. Dehydroascorbate uptake and reduction was not associated with generation of a monoascorbyl free radical intermediate. Uptake and reduction of dehydroascorbate by glucose-depleted erythrocytes coordinately decreased GSH and raised GSSG concentrations in erythrocytes. This effect was reversed by D-glucose, but not by L-lactate. Conversely, depletion of cellular GSH decreased the ability of cells to recycle dehydroascorbate to ascorbate, as reflected in the extent to which cells were able to reduce extracellular ferricyanide. Monoascorbyl free radical was formed during the reduction of extracellular ferricyanide, indicating that one electron transfer steps were involved in this process. In GSH-depleted cells, addition of L-lactate as an energy source for glycolysis-dependent NADH regeneration did cause a partial recovery of the ability of cells to reduce ferricyanide. However, in resealed erythrocyte ghosts containing either 4 mM GSH or 400 mu M NADH, only the GSH-containing ghosts supported regeneration of ascorbate from added dehydroascorbate. These results suggest that in human erythrocytes ascorbate regeneration from dehydroascorbate is largely GSH dependent, and that it occurs through either enzymatic or nonenzymatic reactions not involving the monoascorbyl free radical.

Integrity signals

Registry

Crossref · 10.1016/0891-5849(95)02130-2

Cites

27 of 27 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Within cells, DHA is quickly converted back to ascorbate while consuming GSH and NADPH.

    “Inside the cell, DHA is rapidly reduced back to ascorbate at the expense of GSH and NADPH47,49.”

    From Targeting cancer vulnerabilities with high-dose vitamin C (2019) · cites this paper as [49]

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
May, J. M., Qu, Z.-C., Whitesell, R. R., & Cobb, C. E.
Affiliations
Vanderbilt University (US)
Corresponding author
May, James M.
Venue
Free Radical Biology and Medicine
Publisher
Elsevier BV
Published
1996
Volume
20
Issue
4
Pages
543-551
ISSN
0891-5849 (ISSN-L)
OpenAlex
W2025497222
Cited by
200
References
27
Citations by year
2026: 1 · 2025: 4 · 2024: 5 · 2023: 2 · 2022: 1 · 2021: 7 · 2020: 4 · 2019: 4 · 2018: 2 · 2017: 3 · 2016: 6 · 2015: 4 · 2014: 5 · 2013: 8 · 2012: 5
FWCI
10.16
Type
journal article
Language
en
Open access
closed
Locations
  • Free Radical Biology and Medicine (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (1s10rr004075-01)
  • National Heart, Lung, and Blood Institute (HL34737)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK-26657, P30DK026657)
  • National Center for Research Resources (RR 04075)
Topics
  • Health Sciences › Nursing › Nutrition and Dietetics › Vitamin C and Antioxidants Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Health Sciences › Medicine › Biochemistry › Antioxidant Activity and Oxidative Stress
Keywords
ascorbate recycling, dehydroascorbic acid, glutathione, human erythrocytes, ascorbate regeneration, ferricyanide reduction, NADH regeneration, glucose, L-lactate, glutathione disulfide, erythrocyte ghosts, single electron transfer
MeSH terms
Ascorbic Acid, Dehydroascorbic Acid, Erythrocytes, Ferricyanides, Glutathione, Humans, Oxidation-Reduction

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review