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| Content Provider | PubMed Central |
|---|---|
| Author | Anderson, M. E. Meister, A. |
| Abstract | Administration of gamma-glutamylcystine or of gamma-glutamylcysteine disulfide to mice leads to significantly increased levels of glutathione in the kidney as compared to controls given glutamate plus cysteine (or cystinylbisglycine). Studies with gamma-glutamylcystine selectively labeled with 35S in either the internal or external S atom indicate preferential utilization of the gamma-glutamylcysteine moiety of this compound for glutathione synthesis. Mice depleted of glutathione by treatment with buthionine sulfoximine do not significantly use the disulfides gamma-glutamylcystine or gamma-glutamylcysteine disulfide but do use gamma-glutamylcysteine for glutathione synthesis. These findings suggest a pathway in which gamma-glutamylcystine, formed by transpeptidation between glutathione and cystine, is transported and reduced by transhydrogenation with glutathione to cysteine and gamma-glutamylcysteine; the latter is used directly for glutathione synthesis. The findings show transport of gamma-glutamyl amino acids, indicate an alternative pathway of glutathione synthesis, and demonstrate a means of increasing kidney glutathione levels. |
| Starting Page | 707 |
| File Format | |
| ISSN | 10916490 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 3 |
| Volume Number | 80 |
| Language | English |
| Publisher Date | 1983-02-01 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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