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Stock P, Bielohuby M, Staege MS, Hsu MJ, Bidlingmaier M, Christ B. Impairment of Host Liver Repopulation by Transplanted Hepatocytes in Aged Rats and the Release by Short-Term Growth Hormone Treatment. THE AMERICAN JOURNAL OF PATHOLOGY 2017; 187:553-569. [PMID: 28088007 DOI: 10.1016/j.ajpath.2016.11.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Revised: 10/21/2016] [Accepted: 11/28/2016] [Indexed: 12/28/2022]
Abstract
Hepatocyte transplantation is an alternative to whole liver transplantation. Yet, efficient liver repopulation by transplanted hepatocytes is low in livers of old animals. This restraint might be because of the poor proliferative capacity of aged donor hepatocytes or the regenerative impairment of the recipient livers. The age-dependent liver repopulation by transplanted wild-type hepatocytes was investigated in juvenile and senescent rats deficient in dipeptidyl-peptidase IV. Repopulation was quantified by flow cytometry and histochemical estimation of dipeptidyl-peptidase IV enzyme activity of donor cells in the negative host liver. As a potential pathway involved, expression of cell cycle proteins was assessed. Irrespective of the age of the donor hepatocytes, large cell clusters appeared in juvenile, but only small clusters in senescent host livers. Because juvenile and senescent donor hepatocytes were likewise functional, host-derived factor(s) impaired senescent host liver repopulation. Growth hormone levels were significantly higher in juvenile than in senescent rats, suggesting that growth hormone might promote host liver repopulation. Indeed, short-term treatment with growth hormone augmented senescent host liver repopulation involving the growth hormone-mediated release of the transcriptional blockade of genes associated with cell cycle progression. Short-term growth hormone substitution might improve liver repopulation by transplanted hepatocytes, thus augmenting the therapeutic benefit of clinical hepatocyte transplantation in older patients.
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Affiliation(s)
- Peggy Stock
- Division of Applied Molecular Hepatology, Clinics and Policlinics of Visceral, Transplantation, Thoracic, and Vascular Surgery, University of Leipzig, Leipzig, Germany.
| | - Maximilian Bielohuby
- Endocrine Research Unit, Department of Internal Medicine IV, Ludwig Maximilian University, Munich, Germany
| | - Martin S Staege
- Department of Pediatrics I, Martin Luther University Halle-Wittenberg, Halle, Germany
| | - Mei-Ju Hsu
- Division of Applied Molecular Hepatology, Clinics and Policlinics of Visceral, Transplantation, Thoracic, and Vascular Surgery, University of Leipzig, Leipzig, Germany
| | - Martin Bidlingmaier
- Endocrine Research Unit, Department of Internal Medicine IV, Ludwig Maximilian University, Munich, Germany
| | - Bruno Christ
- Division of Applied Molecular Hepatology, Clinics and Policlinics of Visceral, Transplantation, Thoracic, and Vascular Surgery, University of Leipzig, Leipzig, Germany
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Stock P, Weber K. Deep Digging: Far Red Imaging for the Monitoring of Transplanted Hepatocytes in Rats. Methods Mol Biol 2017; 1506:215-228. [PMID: 27830556 DOI: 10.1007/978-1-4939-6506-9_15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Technologies for in vivo imaging of the distribution and integration of cell transplants gain significance for the use of novel cell therapy approaches in regenerative medicine. Applied to adequate animal models, they provide information on the spatio-temporal engraftment and functional performance of the cells transplanted. This chapter includes a detailed description of the in vivo tracking of transplanted hepatocytes in rat liver including the conjugation of antibodies to fluorochromes for far red imaging using a multispectral optical imager.
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Affiliation(s)
- Peggy Stock
- Clinics and Policlinics of Visceral-, Transplantation-, Thoracic- and Vascular Surgery, Applied Molecular Hepatology, University of Leipzig, Liebigstraße 21, 04103, Leipzig, Germany.
| | - Kristin Weber
- Department of Surgery, University of Leipzig, Leipzig, Germany
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