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RETRACTED ARTICLE: Diagnosis of rejection after liver transplantation: use of phosphorus-31 magnetic resonance spectroscopy (31P-MRS)

An Erratum to this article was published on 30 May 2016

Abstract

Background

In vivo hepatic phosphorus-31 magnetic resonance spectroscopy (31P-MRS) provides non-invasive information about phospholipid metabolism. Aims: To delineate 31P-MRS abnormalities in patients with chronic rejection and to charactererize spectral changes by pathology.

Patients and methods

Sixty-six liver transplant recipients (18 with chronic rejection and 48 with normal graft function) and 38 controls (23 healthy volunteers and fifteen patients with biliary duct stricture) were studied with in vivo 31P-MRS. All the data and peak values were calibrated and calculated by the software of spectroscopy analysis GE, and the pH values were calculated by the Malloy’s formula, then the peak area ratios and altitudes of metabolites relative to adenosine triphosphate (β-ATP)and phosphate (Pi) were measured.

Results

(a) The peak area ratios and altitudes of PME and PDE in biliary duct stricture group and chronic rejection group were higher than those of healthy volunteer group and normal graft function group. Patients with chronic rejection had significant differences in the peak area ratios of PME: β-ATP (P < 0.05) and PDE: β-ATP (P < 0.05) and in the altitudes of PME: β-ATP (P < 0.05) as compared with the other groups. (b) The ratios of β-ATP/Pi decreased in biliary duct stricture group, while they increased in chronic rejection group. There was no difference between the four groups. There were similar changes in the ratios of PME/Pi, but there was significant difference between the chronic rejection group and the other three groups. (c) pH values increased in biliary duct stricture group and chronic rejection group, though the difference was not significant with the healthy control group. (d) Histological specimens showed focal loss of hepatocytes, degeneration, and hepatocytic atrophy.

Conclusions

31P-MRS imaging is valuable in detecting the metabolism of the liver after transplantation, and suggests that further investigation of alterations in the phospholipid metabolism may be a useful future direction of research.

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Correspondence to Shiyuan Liu.

Additional information

The Editor-in-Chief is retracting the article "Diagnosis of rejection after liver transplantation: Use of phosphorus-31 magnetic resonance spectroscopy (31P-MRS)" Abdominal Imaging (2012) 37: 788-794, DOI 10.1007/s00261-008-9451-1 because it contains information that was taken from an earlier published article in another journal ("In vivo and in vitro hepatic phosphorus-31 magnetic resonance spectroscopy and electron microscopy in chronic ductopenic rejection of human liver allografts" Gut (1998) 42: 735-43, DOI 10.1136/gut.42.5.735). Please note that - as of January 2016 - the journal name was changed from Abdominal Imaging to Abdominal Radiology.

An erratum to this article is available athttp://dx.doi.org/10.1007/s00261-016-0766-z.

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Jiang, T., Liu, S., Xiao, X. et al. RETRACTED ARTICLE: Diagnosis of rejection after liver transplantation: use of phosphorus-31 magnetic resonance spectroscopy (31P-MRS). Abdom Radiol 37, 788–794 (2012). https://doi.org/10.1007/s00261-008-9451-1

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  • DOI: https://doi.org/10.1007/s00261-008-9451-1

Keywords

  • Magnetic resonance spectroscopy
  • Liver transplantation
  • Rejection
  • Energy metabolites
  • Phospholipids
  • In vivo