| Autor: |
Abelson, Herbert T., Gorka, Carolyn, Beardsley, G. Peter |
| Zdroj: |
Blood; January 1979, Vol. 53 Issue: 1 p116-121, 6p |
| Abstrakt: |
Normal human platelets were shown to contain the enzyme dihydropteridine reductase. The enzyme was not found in a variety of other cells of hematogenous origin. Partial purification and kinetic and physical data indicated that the platelet enzyme is similar to that previously characterized from liver. Dihydropteridine reductase is important for the regeneration of tetrahydroblopterin, a required cofactor in hydroxylation reactions involved in biogenic amine formation. The presence of the enzyme may indicate that some synthesis de novo of serotonin and/or catecholamines occurs in platelets, as opposed to a purely storage and transport function. In addition, screening for hyper-phenylalaninemia due to dihydropteridine reductase deficiency may become feasible by assaying platelets for enzyme activity. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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