RT Journal Article T1 Presence of methylated arginine derivatives in orthotopic human liver transplantation: Relevance for liver function A1 Martín Sanz, Paloma A1 Olmedilla, Luis A1 Dulin, Elena A1 Casado, Marta A1 Callejas, Nuria A. A1 Pérez Peña, José M. A1 Garutti Martínez, Ignacio A1 Sanz, Javier M. A1 Calleja, Javier A1 Barrigón Vázquez, Santos A1 Bosca Gomar, Lisardo AB Orthotopic liver transplantation (OLT) is a frequent option in the treatment of liver diseases. During the cold ischemia period of the donor liver, there is an accumulation of metabolites that are potent inhibitors of the cytokine-inducible and endothelial nitric oxide synthase isoenzymes. We identified the presence of L-N-monomethylarginine and asymmetric dimethylarginine (ADMA) as the main inhibitors by means of analytic high-pressure liquid chromatography and mass spectrometry techniques. An average ADMA concentration of 450 micromol/L was measured in the preservation medium of donor livers with poor outcomes after OLT. A statistically significant relationship was observed between the concentration of methylated arginine derivatives in the graft and liver function after OLT. These data suggest that measurement of methylated arginine, released after liver protein catabolism, might provide an indication of functional status of the liver that can help the development of strategies intended to improve graft viability. PB Wiley SN 1527-6465 SN 1527-6465 YR 2003 FD 2003-01-01 LK https://hdl.handle.net/20.500.14352/98639 UL https://hdl.handle.net/20.500.14352/98639 LA eng NO Martín-Sanz P, Olmedilla L, Dulin E, Casado M, Callejas NA, Pérez-Peña J, Garutti I, Sanz J, Calleja J, Barrigón S, Boscá L. Presence of methylated arginine derivatives in orthotopic human liver transplantation: relevance for liver function. Liver Transpl. 2003 Jan;9(1):40-8. doi: 10.1053/jlts.2003.50008. PMID: 12514772. NO Universidad Complutense de Madrid NO Comunidad de Madrid DS Docta Complutense RD 6 abr 2025