INFgamma stimulates arginine transport through system y+L in human monocytes.
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Rotoli BM, Bussolati O, Sala R, Barilli A, Talarico E, Gazzola GC, Dall'Asta V
INFgamma stimulates arginine transport through system y+L in human monocytes.
FEBS Lett. 2004 Jul 30;571(1-3):177-81.
- PubMed ID
- 15280038 [ View in PubMed]
- Abstract
Freshly isolated human monocytes transport L-arginine mostly through a sodium independent, NEM insensitive pathway inhibited by L-leucine in the presence, but not in the absence of sodium. Interferon-gamma (IFNgamma) stimulates this pathway, identifiable with system y+L, and markedly enhances the expression of SLC7A7, the gene that encodes for system y+L subunit y+LAT1, but not of SLC7A6, that codes for the alternative subunit y+LAT2. System y+ plays a minor role in arginine uptake by monocytes and the expression of system y+-related genes, SLC7A1 and SLC7A2, is not changed by IFNgamma. These results demonstrate that system y+L is sensitive to IFNgamma.