La
diabetes mellitus se
caracteriza por una pérdida funcional de la masa de
células beta-pancreáticas (células
productoras de insulina). Nuestro interés es:
1.
Estudiar la importancia de la
preservación de la masa de células
beta-pancreáticas en la transición de
prediabetes a diabetes tipo 2.
2.
Inducir la proliferación de estas
células como estrategia:
a.
Para
regenerar las células beta-pancreáticas in vivo.
b.
Expandir
las células beta-pancreáticas ex–vivo para la
terapia celular (transplante de
islotes pancreáticos) de la diabetes.
Publicaciones
representativas:
Cozar-Castellano I., Takane KK., Bottino R., Balamurugan
AN., and Stewart AF. Induction
of beta cell proliferation
and retinoblastoma protein phosphorylation in rat and human islets
using
adenoviruses-mediated transfer of cyclin-dependent kinase-4 and cyclin D1. Diabetes53:149-159.2004. [Pubmed]
Cozar-Castellano I, Stewart AF. Molecular engineering human hepatocytes into pancreatic
beta cells for
diabetes therapy. Proc Natl
Acad Sci U S A. 102(22):7781-2. 2005. [Pubmed]
Vasavada RC, Gonzalez-Pertusa J,
Fujinaka Y, Fiaschi-Taesch N, Cozar-Castellano I,
Garcia-Ocana A. Growth Factors and Beta Cell
Replication. Int J Biochem Cell
Biol Sep 14. 2005. [Pubmed]
Cozar-Castellano
I, Weinstock M, Sipula
D, Velazquez-Garcia S, Stewart AF. Evaluation
of Beta Cell Replication in Mice
Transgenic for Both Hepatocyte Growth Factor and Placental Lactogen:
Comprehensive Characterization of theG1/S Regulatory Proteins Reveals
Unique
involvement of p21cip. Diabetes 55(1):70-7.2006.
[Pubmed]
Cozar-Castellano
I, Fiaschi-Taesch N, Bigatel
TA,
Takane KK, Garcia-Ocaña A, Vasavada R, Stewart AF. Molecular Control of
Cell Cycle Progression in the Pancreatic Beta Cell. Endoc.
Rev.
27(4):356-370. 2006. [Pubmed]
Fiaschi-Taesch N, Sicari BM, Bigatel T, Takane
KK, Cozar-Castellano I, Law
B, Stewart AF. The Cellular Mechanism Which PTH-related
Protein Induces Proliferation in Arterial Smooth Muscle Cells:
Definition of an
Arterial Smooth Muscle PTHrP-p27kip1 Axis.
Circulation
Research. 27;99(9):933-42. 2006.
[Pubmed]
Cozar-Castellano I, Haught
M,
Stewart AF. The Cell
Cycle Inhibitory Protein, p21cip, is Not Essential for
Maintaining Beta
Cell Cycle Arrest or Beta Cell Function in Vivo.
Diabetes 55: 3271-3278.2006. [Pubmed]
Vasavada
RC, Cozar-Castellano I,
Sipula D, Stewart AF. Tissue-specific deletion of
the retinoblastoma protein: pRb is
non-essential for maintaining beta cell arrest. Diabetes
56(1):57-64. 2007.
[Pubmed]
Cozar-Castellano I, Harb G, Selk K, Vasavada R, Sicari
B, Law B, Zhang P, Scott DK, Fiaschi-Taesch N, Stewart AF. Lessons from the first comprehensive molecular
characterization of cell cycle control in rodent insulinoma cell lines.
Diabetes 57(11):3056-68. 2008. [Pubmed]
Fiaschi-Taesch
N, Bigatel TA, Sicari B, Takane KK, Salim F, Velazquez-Garcia S, Harb
G, Selk
K, Cozar-Castellano I, Stewart AF. Survey of the Human Pancreatic
Beta Cell G1/S
Proteome Reveals a Potential Therapeutic Role for Cdk-6 and Cyclin D1
in
Enhancing Human Beta Cell Replication and Function in Vivo. Diabetes: 58(4):882-93.
2009. [Pubmed]