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Serum autotaxin levels are correlated with hepatic fibrosis and ballooning in patients with non-alcoholic fatty liver disease.

Serum autotaxin levels are correlated with hepatic fibrosis and ballooning in patients with non-alcoholic fatty liver disease.
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Fujimori N, Umemura T, Kimura T, Tanaka N, Sugiura A, Yamazaki T, Joshita S, Komatsu M, Usami Y, Sano K, Igarashi K, Matsumoto A, Tanaka E,


Fujimori N, Umemura T, Kimura T, Tanaka N, Sugiura A, Yamazaki T, Joshita S, Komatsu M, Usami Y, Sano K, Igarashi K, Matsumoto A, Tanaka E, (click to view)

Fujimori N, Umemura T, Kimura T, Tanaka N, Sugiura A, Yamazaki T, Joshita S, Komatsu M, Usami Y, Sano K, Igarashi K, Matsumoto A, Tanaka E,

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World journal of gastroenterology 24(11) 1239-1249 doi 10.3748/wjg.v24.i11.1239

Abstract
AIM
To examine the relationship between serum autotaxin (ATX) concentrations and clinicopathological findings in non-alcoholic fatty liver disease (NAFLD) patients.

METHODS
One hundred eighty-six NAFLD patients who had undergone liver biopsy between 2008 and 2017 were retrospectively enrolled. Serum samples were collected at the time of biopsy and ATX was measured by enzyme immunoassays. Sera obtained from 160 healthy, non-obese individuals were used as controls. Histological findings were graded according to an NAFLD scoring system and correlations with serum ATX were calculated by Spearman’s test. Diagnostic accuracy was evaluated using the area under the receiver operating characteristic curve (AUC). Cut-off values were identified by the Youden index, and the nearest clinically applicable value to the cutoff was considered the optimal threshold for clinical convenience.

RESULTS
Serum ATX levels were significantly higher in NAFLD patients than in controls (0.86 mg/L0.76 mg/L,< 0.001) and correlated significantly with ballooning score and fibrosis stage (= 0.36,< 0.001 and= 0.45,< 0.001, respectively). Such tendencies were stronger in female patients. There were no remarkable relationships between ATX and serum alanine aminotransferase, lipid profiles, or steatosis scores. The AUC values of ATX for predicting the presence of fibrosis (≥ F1), significant fibrosis (≥ F2), severe fibrosis (≥ F3), and cirrhosis (F4), were all more than 0.70 in respective analyses. CONCLUSION
Serum ATX levels may at least partially reflect histological severity in NAFLD.

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