Publications de Anne Grapin-Botton

Longitudinal three-dimensional visualisation of autoimmune diabetes by functional optical coherence imaging

Theo Lasser, Martin Villiger, Anne Grapin-Botton, Corinne Berclaz, Joan Goulley, Arno Pino Bouwens, Daniel Pawel Szlag, Jérôme Extermann

Aims/hypothesis It is generally accepted that structural and functional quantitative imaging of individual islets would be beneficial to elucidate the pathogenesis of type 1 diabetes. We here introduce functional optical coherence imaging (FOCI) for fast, ...

Springer Verlag2016

Label-free fast 3D coherent imaging reveals pancreatic islet micro-vascularization and dynamic blood flow

Theo Lasser, Anne Grapin-Botton, Corinne Berclaz, Paul James Marchand, David Nguyen, Arno Pino Bouwens, Daniel Pawel Szlag, Jérôme Extermann, Julia Sophie Katarina Nilsson

In diabetes, pancreatic beta-cells play a key role. These cells are clustered within structures called islets of Langerhans inside the pancreas and produce insulin, which is directly secreted into the blood stream. The dense vascularization of islets of La ...

2016

Combined Optical Coherence and Fluorescence Microscopy to assess dynamics and specificity of pancreatic beta-cell tracers

Theo Lasser, Antonio Lopez, Anne Grapin-Botton, Corinne Berclaz, Christophe Pache, Arno Pino Bouwens, Daniel Pawel Szlag

The identification of a beta-cell tracer is a major quest in diabetes research. However, since MRI, PET and SPECT cannot resolve individual islets, optical techniques are required to assess the specificity of these tracers. We propose to combine Optical Co ...

Nature Publishing Group2015

Concise Reviews: In Vitro-Produced Pancreas Organogenesis Models in Three Dimensions: Self-Organization From Few Stem Cells or Progenitors

Anne Grapin-Botton, Chiara Greggio, Filippo De Franceschi

Three-dimensional models of organ biogenesis have recently flourished. They promote a balance between stem/progenitor cell expansion and differentiation without the constraints of flat tissue culture vessels, allowing for autonomous self-organization of ce ...

Wiley-Blackwell2015

Bicaudal C1 promotes pancreatic NEUROG3+ endocrine progenitor differentiation and ductal morphogenesis

Daniel Constam, Anne Grapin-Botton, Joan Goulley, Laurence Anne E Lemaire, Jacques Rougemont, Yung Hae Kim

In human, mutations in bicaudal C1 (BICC1), an RNA binding protein, have been identified in patients with kidney dysplasia. Deletion of Bicc1 in mouse leads to left-right asymmetry randomization and renal cysts. Here, we show that BICC1 is also expressed i ...

Company Of Biologists Ltd2015

REST represses a subset of the pancreatic endocrine differentiation program

Anne Grapin-Botton, Yung Hae Kim

To contribute to devise successful beta-cell differentiation strategies for the cure of Type 1 diabetes we sought to uncover barriers that restrict endocrine fate acquisition by studying the role of the transcriptional repressor REST in the developing panc ...

Academic Press Inc Elsevier Science2015

Cell Cycle-Dependent Differentiation Dynamics Balances Growth and Endocrine Differentiation in the Pancreas

Anne Grapin-Botton, Laurence Anne E Lemaire, Yung Hae Kim

Organogenesis relies on the spatiotemporal balancing of differentiation and proliferation driven by an expanding pool of progenitor cells. In the mouse pancreas, lineage tracing at the population level has shown that the expanding pancreas progenitors can ...

Public Library Science2015

In Vitro Pancreas Organogenesis from Dispersed Mouse Embryonic Progenitors

Anne Grapin-Botton, Chiara Greggio, Filippo De Franceschi

The pancreas is an essential organ that regulates glucose homeostasis and secretes digestive enzymes. Research on pancreas embryogenesis has led to the development of protocols to produce pancreatic cells from stem cells. The whole embryonic organ can be c ...

Journal Of Visualized Experiments2014

Artificial three-dimensional niches deconstruct pancreas development in vitro

Matthias Lütolf, Anne Grapin-Botton, Chiara Greggio, Adrian Ranga, Samy Gobaa, Filippo De Franceschi

In the context of a cellular therapy for diabetes, methods for pancreatic progenitor expansion and subsequent differentiation into insulin-producing beta cells would be extremely valuable. Here we establish three-dimensional culture conditions in Matrigel ...

Company Of Biologists Ltd2013

COUP-TFII Controls Mouse Pancreatic beta-Cell Mass through GLP-1-beta-Catenin Signaling Pathways

Anne Grapin-Botton

Background: The control of the functional pancreatic beta-cell mass serves the key homeostatic function of releasing the right amount of insulin to keep blood sugar in the normal range. It is not fully understood though how beta-cell mass is determined. ...

2012

Patterning and shaping the endoderm in vivo and in culture

Anne Grapin-Botton, Marine Marie Kraus

The definitive endoderm (DE) was first defined as the innermost germ layer found in all metazoan embryos. During development, it gives rise to a vast array of specialized epithelial cell types lining the respiratory and digestive systems, and contributes t ...

Elsevier2012

Diabetes imaging — quantitative assessment of islets of Langerhans distribution in murine pancreas using extended-focus optical coherence microscopy

Anthony Christopher Davison, Theo Lasser, Martin Villiger, Dimitri Nestor Alice Van De Ville, Anne Grapin-Botton, Corinne Berclaz, Joan Goulley, Erica Martin-Williams, Arno Pino Bouwens

Diabetes is characterized by hyperglycemia that can result from the loss of pancreatic insulin secreting β-cells in the islets of Langerhans. We analyzed ex vivo the entire gastric and duodenal lobes of a murine pancreas using extended-focus Optical Cohere ...

2012

Partial promoter substitutions generating transcriptional sentinels of diverse signaling pathways in embryonic stem cells and mice

Anne Grapin-Botton

Extracellular signals in development, physiology, homeostasis and disease often act by regulating transcription. Herein we describe a general method and specific resources for determining where and when such signaling occurs in live animals and for systema ...

Company Of Biologists Ltd2012

Dual Lineage-Specific Expression of Sox17 During Mouse Embryogenesis

Anne Grapin-Botton, Marine Marie Kraus, Laurence Anne E Lemaire

Sox17 is essential for both endoderm development and fetal hematopoietic stem cell (HSC) maintenance. While endoderm-derived organs are well known to originate from Sox17-expressing cells, it is less certain whether fetal HSCs also originate from Sox17-exp ...

Wiley-Blackwell2012

Planar Cell Polarity Controls Pancreatic Beta Cell Differentiation and Glucose Homeostasis

Anne Grapin-Botton, Mathieu Gouzi, Cédric Cortijo

Planar cell polarity (PCP) refers to the collective orientation of cells within the epithelial plane. We show that progenitor cells forming the ducts of the embryonic pancreas express PCP proteins and exhibit an active PCP pathway. Planar polarity proteins ...

Cell Press2012

A Notch-dependent molecular circuitry initiates pancreatic endocrine and ductal cell differentiation

Anne Grapin-Botton

In the pancreas, Notch signaling is thought to prevent cell differentiation, thereby maintaining progenitors in an undifferentiated state. Here, we show that Notch renders progenitors competent to differentiate into ductal and endocrine cells by inducing a ...

2012

RNA Profiling and Chromatin Immunoprecipitation-Sequencing Reveal that PTF1a Stabilizes Pancreas Progenitor Identity via the Control of MNX1/HLXB9 and a Network of Other Transcription Factors

Philipp Bucher, Anne Grapin-Botton, Emilie Gesina, Nancy Thompson

Pancreas development is initiated by the specification and expansion of a small group of endodermal cells. Several transcription factors are crucial for progenitor maintenance and expansion, but their interactions and the downstream targets mediating their ...

American Society for Microbiology2012

Two mutations in human BICC1 resulting in Wnt pathway hyperactivity associated with cystic renal dysplasia

Daniel Constam, Anne Grapin-Botton, Marine Marie Kraus

Bicaudal C homologue 1 (Bicc1) knockout in mice causes polycystic kidney disease and pancreas development defects, including a reduction in insulin-producing β-cells and ensuing diabetes. We therefore screened 137 patients with renal abnormalities or assoc ...

2011

Neurogenin3 Initiates Stepwise Delamination of Differentiating Endocrine Cells During Pancreas Development

Anne Grapin-Botton, Mathieu Gouzi, Yung Hae Kim, Keiichi Katsumoto

During development, pancreatic endocrine cells are specified within the pancreatic epithelium. They subsequently delaminate out of the epithelium and cluster in the mesenchyme to form the islets of Langerhans. Neurogenin3 (Ngn3) is a transcription factor r ...

2011

Towards high resolution optical imaging of beta cells in vivo

Theo Lasser, Martin Villiger, Anne Grapin-Botton, Joan Goulley, Erica Martin-Williams

Endocrine beta cells produce and release insulin in order to tightly regulate glucose homeostasis and prevent metabolic pathologies such as Diabetes Mellitus. Optical imaging has contributed greatly to our current understanding of beta cell structure and f ...

Bentham Science Publishers2010