Please use this identifier to cite or link to this item:
https://hdl.handle.net/1959.11/17
Title: | Enhancement of glutathione-dependent haemin degradation by ascorbic acid | Contributor(s): | Zou, C (author); Agar, NS (author); Jones, GL (author) | Publication Date: | 2002 | DOI: | 10.1016/S0006-2952(02)01214-5 | Handle Link: | https://hdl.handle.net/1959.11/17 | Abstract: | In the current work, we investigated the effect of ascorbic acid on GSH-mediated haemin degradation. GSH-mediated haemin degradation in the presence of ascorbic acid in phosphate-buffered saline and in erythrocyte ghosts was determined by recording absorbance at 365 and 399nm, respectively. Generation of intracellular H(2)O(2) was measured indirectly in terms of the inactivation of endogenous catalase in erythrocytes in the presence of 3-amino-1,2,4-triazole. Although ascorbic acid itself did not induce haemin degradation, it enhanced GSH-mediated haemin degradation. Experiments with catalase showed that H(2)O(2) was essential in this process. The oxidation of ascorbic acid in the presence of haemin was stimulated by GSH, suggesting that ascorbic acid can alter the mechanism of H(2)O(2) generation observed with GSH and haemin alone. These results suggest that enhancement of GSH-mediated haemin degradation by ascorbic acid may be due to an increase in the production of H(2)O(2) generated by GSH and haemin in the absence of ascorbic acid. | Publication Type: | Journal Article | Source of Publication: | Biochemical Pharmacology, 64(4), p. 565-572 | Publisher: | Elsevier Inc | Place of Publication: | United States of America | ISSN: | 0006-2952 | Fields of Research (FoR) 2008: | 060104 Cell Metabolism | Peer Reviewed: | Yes | HERDC Category Description: | C1 Refereed Article in a Scholarly Journal |
---|---|
Appears in Collections: | Journal Article |
Files in This Item:
File | Description | Size | Format |
---|
SCOPUSTM
Citations
11
checked on Mar 23, 2024
Page view(s)
1,140
checked on Mar 24, 2024
Download(s)
2
checked on Mar 24, 2024
Items in Research UNE are protected by copyright, with all rights reserved, unless otherwise indicated.