Foetal 'flat' bile acids reappear during human liver regeneration after surgery.

Abstract:

BACKGROUND:Changes in bile acid (BA) pool, such as the reappearance of typically foetal-type molecular species with a 'flat' structure at the steroid ring, occur during hepatocarcinogenesis, both in humans and rodents. Moreover flat-BAs also appear during rat liver regeneration. These changes can be detected in urine. The aim of the present study was to investigate whether flat-BAs also reappear during human liver regeneration, and whether this change correlates with the magnitude of liver resection. MATERIALS AND METHODS:Patients undergoing partial hepatectomy were divided in two groups: major hepatectomy group (> 50% of hepatic tissue resection, n = 17) and minor hepatectomy group (< 50%, n = 13). BAs were extracted from serum and urine (collected over 24 h) and analysed by gas chromatography-mass spectrometry. Samples were obtained before surgery (day 0) and on the third and seventh days after hepatectomy. RESULTS:In serum, total BAs significantly increased on day seven after hepatectomy, but only a moderate increase in flat-BA concentrations was observed. By contrast, urinary excretion of total as well as flat-BAs significantly increased at day three and day seven after hepatectomy. Moreover, the amount of flat-BAs excreted in urine during the first week after partial hepatectomy correlated with the magnitude of the resection. CONCLUSIONS:Urinary BA output increases and flat-BAs reappear in urine during human liver regeneration. These results suggest that determination of BAs in urine may be an interesting parameter obtained by non-invasive techniques whose actual clinical value during human liver regeneration warrants further evaluation.

journal_name

Eur J Clin Invest

authors

Stärkel P,Shindano T,Horsmans Y,Gigot JF,Fernandez-Tagarro M,Marin JJ,Monte MJ

doi

10.1111/j.1365-2362.2008.02059.x

subject

Has Abstract

pub_date

2009-01-01 00:00:00

pages

58-64

issue

1

eissn

0014-2972

issn

1365-2362

pii

ECI2059

journal_volume

39

pub_type

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