Quantification of liver perfusion with [O-15]H2O-PET and its relationship with glucose metabolism and substrate levels

Lotfi Slimani*, Nobuyuki Kudomi, Vesa Oikonen, M. Jarvisalo, Jan Kiss, Alexandru Naum, Ronald Borra, Antti Viljanen, Hannu Sipila, Ele Ferrannini, Timo Savunen, Pirjo Nuutila, Patricia Iozzo

*Corresponding author voor dit werk

    OnderzoeksoutputAcademicpeer review

    18 Citaten (Scopus)

    Samenvatting

    Background/Aims: Hepatic perfusion plays an important role in liver physiology and disease. This study was undertaken to (a) validate the use of Positron Emission Tomography (PET) and oxygen-15-labeled water ([O-15]H2O) to quantify hepatic and portal perfusion, and (b) examine relationships between portal perfusion and liver glucose and lipid metabolism.

    Methods: Liver [O-15]H2O-PET images were obtained in 14 pigs during fasting or hyperinsulinemia. Carotid arterial and portal venous blood were sampled for [O-15]H2O activity; Doppler ultrasonography was used invasively as the reference method. A single arterial input compartment model was developed to estimate portal tracer kinetics and liver perfusion. Endogenous glucose production (EGP) and insulin-mediated whole body glucose uptake (wbGU) were determined by standard methods.

    Results: Hepatic arterial and portal venous perfusions were 0.15 +/- 0.07 and 1.11 +/- 0.34 ml/min/ml of tissue, respectively. The agreement between ultrasonography and [O-15]H2O-PET was good for total and portal liver perfusion, and poor for arterial perfusion. Portal perfusion was correlated with EGP (r = +0.62, p = 0.03), triglyceride (r = +0.66, p = 0.01), free fatty acid levels (r = +0.76, p = 0.003), and plasma lactate levels (r = -0.81, p = 0.0009).

    Conclusions: Estimates of liver perfusion by [O-15]H2O-PET compared well with those by ultrasonography. The method allowed to predict portal tracer concentrations which is essential in human studies. Portal perfusion may affect liver nutrient handling. (c) 2008 European Association for the Study of the Liver. Published by Elsevier B.V. All rights reserved.

    Originele taal-2English
    Pagina's (van-tot)974-982
    Aantal pagina's9
    TijdschriftJournal of Hepatology
    Volume48
    Nummer van het tijdschrift6
    DOI's
    StatusPublished - jun.-2008

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