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Single Liver Lobe Repopulation with Wildtype Hepatocytes Using Regional Hepatic Irradiation Cures Jaundice in Gunn Rats

Zhou, H and Dong, X and Kabarriti, R and Chen, Y and Avsar, Y and Wang, X and Ding, J and Liu, L and Fox, IJ and Roy-Chowdhury, J and Roy-Chowdhury, N and Guha, C (2012) Single Liver Lobe Repopulation with Wildtype Hepatocytes Using Regional Hepatic Irradiation Cures Jaundice in Gunn Rats. PLoS ONE, 7 (10).

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Background and Aims: Preparative hepatic irradiation (HIR), together with mitotic stimulation of hepatocytes, permits extensive hepatic repopulation by transplanted hepatocytes in rats and mice. However, whole liver HIR is associated with radiation-induced liver disease (RILD), which limits its potential therapeutic application. In clinical experience, restricting HIR to a fraction of the liver reduces the susceptibility to RILD. Here we test the hypothesis that repopulation of selected liver lobes by regional HIR should be sufficient to correct some inherited metabolic disorders. Methods: Hepatocytes (107) isolated from wildtype F344 rats or Wistar-RHA rats were engrafted into the livers of congeneic dipeptidylpeptidase IV deficient (DPPIV-) rats or uridinediphosphoglucuronateglucuronosyltransferase-1A1-deficient jaundiced Gunn rats respectively by intrasplenic injection 24 hr after HIR (50 Gy) targeted to the median lobe, or median plus left liver lobes. An adenovector expressing hepatocyte growth factor (1011 particles) was injected intravenously 24 hr after transplantation. Results: Three months after hepatocyte transplantation in DPPIV- rats, 30-60% of the recipient hepatocytes were replaced by donor cells in the irradiated lobe, but not in the nonirradiated lobes. In Gunn rats receiving median lobe HIR, serum bilirubin declined from pretreatment levels of 5.17±0.78 mg/dl to 0.96±0.30 mg/dl in 8 weeks and remained at this level throughout the 16 week observation period. A similar effect was observed in the group, receiving median plus left lobe irradiation. Conclusions: As little as 20% repopulation of 30% of the liver volume was sufficient to correct hyperbilirubinemia in Gunn rats, highlighting the potential of regiospecific HIR in hepatocyte transplantation-based therapy of inherited metabolic liver diseases. © 2012 Zhou et al.


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Item Type: Article
Status: Published
CreatorsEmailPitt UsernameORCID
Zhou, H
Dong, X
Kabarriti, R
Chen, Y
Avsar, Y
Wang, X
Ding, J
Liu, L
Fox, IJijf5@pitt.eduIJF5
Roy-Chowdhury, J
Roy-Chowdhury, N
Guha, C
ContributionContributors NameEmailPitt UsernameORCID
Date: 16 October 2012
Date Type: Publication
Journal or Publication Title: PLoS ONE
Volume: 7
Number: 10
DOI or Unique Handle: 10.1371/journal.pone.0046775
Schools and Programs: School of Medicine > Surgery
Refereed: Yes
Date Deposited: 19 Oct 2012 21:26
Last Modified: 22 Jun 2021 14:55


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