We propose the generation of a transgenic model of rapid inducible diabetes. The major aim of this proposal is to determine the origin of insulin-producing beta-cells in adult mice. In these animals, complete, or partial, selective destruction of pancreatic beta-cells will be induced, either during development, during postnatal growth or in adults, upon administration of an inducer drug. These animals will not be engineered to study the pathogenesis of Type I diabetes and the autoimmune mechanisms, nor inflammation;rather, they will be useful to accurately assess islet (beta-cell) neoformation in adult pancreas during the regeneration process that should follow the treatment with the inducer agent. They will also be used in reconstitution assays to determine the differentiation potential of injected stem / progenitor cells, whether i.v. or directly into the pancreas, derived either from pancreatic or extra-pancreatic tissues (e. g. hepatic, neural or hematopoietic stem cells, or ES cell clones). Incidentally, this transgenic model will represent a unique tool to study the involvement of beta-cells in pancreas homeostasis, besides their role of producing insulin.
The specific aims are: i) generation of a transgenic model of beta-cell ablation, which will be useful to ii) study beta-cell regeneration and to iii) perform in vivo clonogenic reconstitution assays of transplanted cells. Beyond the basic processes of organ growth and maintenance, this study may have implications for cell replacement therapy in diabetes and for all ethical issues related to the use of embryonic or adult stem cells. Once generated, these transgenic strains will be put into the """"""""public"""""""" Beta Cell Biology Consortium (BCBC) mouse repository, so as to become available to the broad scientific community, as we have already done with other transgenic mice that we produced in the past

Agency
National Institute of Health (NIH)
Institute
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Type
Research Project--Cooperative Agreements (U01)
Project #
5U01DK072522-05
Application #
7685443
Study Section
Special Emphasis Panel (ZDK1-GRB-3 (M3))
Program Officer
Sato, Sheryl M
Project Start
2005-08-01
Project End
2010-07-31
Budget Start
2009-08-01
Budget End
2010-07-31
Support Year
5
Fiscal Year
2009
Total Cost
$286,605
Indirect Cost
Name
University of Geneva
Department
Type
DUNS #
481076537
City
Geneva
State
Country
Switzerland
Zip Code
CH-12-11
Chera, Simona; Herrera, Pedro L (2016) Regeneration of pancreatic insulin-producing cells by in situ adaptive cell conversion. Curr Opin Genet Dev 40:1-10
Chera, Simona; Baronnier, Delphine; Ghila, Luiza et al. (2014) Diabetes recovery by age-dependent conversion of pancreatic ?-cells into insulin producers. Nature 514:503-7
Schaffer, Ashleigh E; Yang, Almira J; Thorel, Fabrizio et al. (2011) Transgenic overexpression of the transcription factor Nkx6.1 in ýý-cells of mice does not increase ýý-cell proliferation, ýý-cell mass, or improve glucose clearance. Mol Endocrinol 25:1904-14
Ait-Lounis, Aouatef; Bonal, Claire; Seguín-Estévez, Queralt et al. (2010) The transcription factor Rfx3 regulates beta-cell differentiation, function, and glucokinase expression. Diabetes 59:1674-85
Thorel, Fabrizio; Népote, Virginie; Avril, Isabelle et al. (2010) Conversion of adult pancreatic alpha-cells to beta-cells after extreme beta-cell loss. Nature 464:1149-54
Strom, Alessandra; Bonal, Claire; Ashery-Padan, Ruth et al. (2007) Unique mechanisms of growth regulation and tumor suppression upon Apc inactivation in the pancreas. Development 134:2719-25
Quoix, Nicolas; Cheng-Xue, Rui; Guiot, Yves et al. (2007) The GluCre-ROSA26EYFP mouse: a new model for easy identification of living pancreatic alpha-cells. FEBS Lett 581:4235-40