New sources of pancreatic beta cells are urgently needed to enable more islet transplants to be carried out for serious cases of type 1 diabetes. A source of autologous beta cells would solve the tissue supply problem and also reduce the need for immunosuppression. This proposal describes a translational research project designed to optimize a protocol for making beta cells, or beta-like cells, from hepatocytes. The recent advent of induced pluripotential cell (iPS) technology has demonstrated the potential for using specific transcription factors to reprogram one cell type to another. The long term goal is to develop a reliable supply of beta cells for clinical transplantation. The objective of this application is to optimize methods for production of beta cells, or cells with a phenotype approaching that of the beta cell, starting from normal hepatocytes. The rationale for this study depends on the close developmental similarity of liver and pancreas, and on previous work showing that overexpression of Pdx1 in liver can provoke expression of beta cell genes. A three step process will be developed based on application of iPS technology, used here not to make embryonic stem cells but to transform one differentiated cell type into another. First, induction of de- differentiation. Second, introduction of specific transcription factors. Third, treatment with agents promoting beta cell differentiation. Preliminary results have already identified the best combination of transcription factors for inducing beta cell-specific gene expression, have shown the critical importance of prior morphological de-differentiation of the hepatocytes, and have identified some maturation-promoting factors. The overall goal will be met through achieving each of the following three specific aims, the results on chromatin changes informing the development of the main protocol: 1: To optimize the methods for producing beta-like cells from primary hepatocytes in vitro. 2: To determine the changes that occur at the chromatin level during hepatocyte de-differentiation. 3: To translate the findings to human hepatocytes. Beta-like cells produced by the optimized protocol will be characterized to establish their phenotype and their capacity to cure experimental diabetes. The approach is innovative because it is the first time that iPS technology and the three step design have been applied to this problem. Success in generating a working protocol will lead directly to studies on larger animals and eventually to clinical trials on human patients.

Public Health Relevance

This project is designed to find a new way to make pancreatic beta cells, by reprogramming of hepatocytes. Islet (beta cell) transplantation is a successful method of cell therapy for treatment of severe type 1 diabetes, but the number of patients who can be treated is severely limited by cell supply. A new source of beta cells would enable many more transplants to be carried out.

Agency
National Institute of Health (NIH)
Institute
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Type
Research Project (R01)
Project #
5R01DK080747-02
Application #
8054390
Study Section
Cellular Aspects of Diabetes and Obesity Study Section (CADO)
Program Officer
Sato, Sheryl M
Project Start
2010-04-01
Project End
2015-02-28
Budget Start
2011-03-01
Budget End
2012-02-29
Support Year
2
Fiscal Year
2011
Total Cost
$373,725
Indirect Cost
Name
University of Minnesota Twin Cities
Department
Genetics
Type
Schools of Medicine
DUNS #
555917996
City
Minneapolis
State
MN
Country
United States
Zip Code
55455
Banga, A; Greder, L V; Dutton, J R et al. (2014) Stable insulin-secreting ducts formed by reprogramming of cells in the liver using a three-gene cocktail and a PPAR agonist. Gene Ther 21:19-27
Akinci, Ersin; Banga, Anannya; Tungatt, Katie et al. (2013) Reprogramming of various cell types to a beta-like state by Pdx1, Ngn3 and MafA. PLoS One 8:e82424
Yang, Ying; Akinci, Ersin; Dutton, James R et al. (2013) Stage specific reprogramming of mouse embryo liver cells to a beta cell-like phenotype. Mech Dev 130:602-12
Greder, Lucas V; Gupta, Sandeep; Li, Shunan et al. (2012) Analysis of endogenous Oct4 activation during induced pluripotent stem cell reprogramming using an inducible Oct4 lineage label. Stem Cells 30:2596-601
Kudva, Yogish C; Ohmine, Seiga; Greder, Lucas V et al. (2012) Transgene-free disease-specific induced pluripotent stem cells from patients with type 1 and type 2 diabetes. Stem Cells Transl Med 1:451-61
Akinci, Ersin; Banga, Anannya; Greder, Lucas V et al. (2012) Reprogramming of pancreatic exocrine cells towards a beta (*) cell character using Pdx1, Ngn3 and MafA. Biochem J 442:539-50
Banga, Anannya; Akinci, Ersin; Greder, Lucas V et al. (2012) In vivo reprogramming of Sox9+ cells in the liver to insulin-secreting ducts. Proc Natl Acad Sci U S A 109:15336-41
Sajini, Abdulrahim A; Greder, Lucas V; Dutton, James R et al. (2012) Loss of Oct4 expression during the development of murine embryoid bodies. Dev Biol 371:170-9