About
Research Background
Epithelia constitute the surfaces and lining of our bodies and provide a protective envelope against external environment but also regulate water, nutrient absorption and glandular secretions.
Although epithelia can be multilayered (stratified) or single-layered (simple) they both need to constantly replace damaged or dead cells during the life. Adult stem cells are responsible for this process of tissue homeostasis critical for the maintenance of the tissue. At certain location of the body, transition zone lies between two types of epithelium. These transition zones are found in the eye, oesophagus, stomach, ovary, cervix and anus. In human, these junctions are highly susceptible to tumor formation and the interest of my laboratory is to identify the underlying molecular and cellular basis for this tumor susceptibility. We are investigating the intrinsic properties of these transitional epithelial cells and their interactions with the neighboring cells. We hypothesize that cells within this region are intrinsically more prone to transformation or alternatively, that the environment is permissive for transformed cells.
Team
EPITHELIAL STEM CELLS AND CANCER
Charafe-Jauffret E., Ginestier C.
Principal Investigator
Géraldine Guasch, Ph.D, HDR
read morePermanent Research Engineer
Véronique Chevrier, Ph.D
Read moreMD INTERN IN DIGESTIVE SURGERY
Victoria Weets, MD
Read morePhD Student Oncology
Chloé Petitpas
Read moreMaster 2 Pro Aix-Marseille University
Simon Triaire
Read moreMaster 2, Aix-Marseille University
Fiona Lucia
Read moreEngineer (IE)
Marjorie Martin
Read moreEngineer (IE)
Solène Mathieu
Read moreAlumni
MD intern in digestive surgery
Julien Bonnet
Read moreMaster 1
Sonia Rolo
Read morePost-doctoral student
Louciné Mitoyan
Read moreEngineer (IE)
Alexane Ollivier
Read moreMD intern in digestive surgery
Eddy Traversari
Read moreEngineer (IE)
Manon Saubin
Read moreLab’s media
A video presentation of 3D HubO Platform for Stem Cell and Organoid Medicine. This video was made possible by the Institute Cancer and Immunology (ICI).
Our lab’s pictures
Lab party under the rain… and then the sun to celebrate our latest publication! #teambuilding
Professor Michael Rendl working on hair follicle development from Mount Sinai New York has visited us in May 2019
A la rencontre du monde des chirurgiens, personnel médical, patients pour discuter de la politique de santé et des perspectives dans le dépistage du cancer colorectal – Crédits photo & COPYRIGHT IPC, MICHEL GELABERT
Débats publics de l’Institut Paoli Calmettes
”Find the pink stars”: LOUCINÉ and GÉRALDINE at the Gordon Research International Conference in July 2019
Talk with Dr. Cécile de Chaisemartin at the Annual Seminar of the Canceropole SUD at the Translational Session
July 1st, 2021
A new physiological platform for research on living disease tissue called ‘’3D-Hub-O Platform’’ to be launched on January 2020
Jan 1st, 2020
Research projects
Epithelial tissues are maintained through life by stem cells.
We have recently identified an unrecognized stem cell niche at the junction area between two epithelium, called transition zone frequently associated with cancer with poor prognosis. Our group studies the role of these cells in transition zones in cellular homeostasis and tumorigenesis.
Resources
3D-Hub-O Platform
With the financial help of the Canceropole PACA, a first-in-class physiological platform for research on living disease tissue called ‘’3D-Hub-O Platform’’ located at the CRCM (Marseille) will be available to researchers in January 2020.
Led by Dr. Guasch (scientific director) and Dr. Chevrier (technical director), the platform will focus on three main objectives
- To generate human organs to study and cure disease
- To generate patient-derived organoid (PDO) biobank for precision medicine
- To generate human organs and tumors with a working microenvironment
network
Institut Fresnel
http://www.fresnel.fr/spip
FSSCR: Member of the Société Française de Recherche sur les Cellules Souches
http://fsscr.fr
Former member of the International Society for Stem Cell Research
http://www.isscr.org
Adjunct Assistant Professor in the Developmental Biology Department at Cincinnati Children’s Hospital
https://www.cincinnatichildrens.org/research/divisions/d/dev-biology
Former Research Associate at The Rockefeller University, New York
http://www.rockefeller.edu
City University of Hong Kong
http://www.cityu.edu.hk/bms/
Publications
Most relevant publications to the current projects
Richart L, Picod-Chedotel ML, Wassef M, Macario M, Aflaki S, Salvador MA, Héry T, Dauphin A, Wicinski J, Chevrier V, Pastor S, Guittard G, Le Cam S, Kamhawi H, Castellano R, Guasch G, Charafe-Jauffret E, Heard E, Margueron R, Ginestier C.
XIST loss impairs mammary stem cell differentiation and increases tumorigenicity through Mediator hyperactivation. Cell. 2022 Jun 9;185(12):2164-2183.e25.
Mitoyan L, Chevrier V, Hernandez-Vargas H, Ollivier A, Homayed Z, Pannequin J, Poizat F, De Biasi-Cador C, Charafe-Jauffret E, Ginestier C, and Guasch G.
A stem cell population at the anorectal junction maintains homeostasis and participates in tissue regeneration after injury. Nature Communications 2021 12(1):2761.
Alexane Ollivier, Maxime Mahé, Guasch G.
Modeling gastrointestinal diseases using organoids to understand healing and regenerative processes. Cells. 2021,10, 1331
McCauley HA., Guasch G.
Isolation and separation of epithelial CD34+ cancer stem cells from Tgfbr2-deficient squamous cell carcinoma. Bio-protocol. 2017
McCauley HA., Chevrier V., Birnbaum D., Guasch G.
De-repression of the RAC activator ELMO1 in cancer stem cells drives progression of TGFβ-deficient squamous cell carcinoma from transition zones. ELife. 2017. pii: e22914.
McCauley HA., Guasch G.
Serial orthotopic transplantation of epithelial tumors in single-cell suspension. Methods Mol Biol. 2013. 1035:231-45.
McNairn A., Guasch G
Epithelial Transition Zones: merging microenvironments, niches, and cellular transformation. European Journal of Dermatology. 2011, 21(Suppl.2):21-28. Review.
Runck L., Kramer M., Ciraolo G., Lewis A., Guasch G.
Identification of epithelial label-retaining cells at the transition between the anal canal and the rectum in mice. Cell Cycle. 2010, 15: 3039-3045. Cover Article.
Guasch G Schober M., Pasolli A., Conn E., Polak L., Fuchs E.
Loss of TGFβ signalling destabilizes homeostasis and promotes squamous cell carcinomas in stratified epithelia. Cancer Cell. 2007, 12: 313-327. Featured Article
Highlighted by: Wakefield LM et al., Cancer Cell. 2007, 12: 313-327.
Tumbar T., Guasch G., Greco V., Blanpain C., Lowry W., Rendl M., Fuchs E.
Defining the epithelial stem cell niche in skin. Science. 2004, 303: 359-363.
Fuchs E., Tumbar T., Guasch G.
Socializing with the neighbors: stem cells and their niche. Cell. 2004, 116: 769-778. Review.
Additional recent publications of importance to the field
McCauley, HA. and Guasch G
Three Cheers For The Goblet Cell: Maintaining Homeostasis In Mucosal Epithelia. Trends In Molecular Medicine, 2015 Jul 3. pii: S1471-4914(15)00120-3. Revue. Cover
McCauley HA, Liu C-Y, Attia A, Wikenheiser-Brokamp KA, Zhang Y, Whitsett JA, and Guasch G.
TGFβ signaling inhibits goblet cell differentiation via SPDEF in the conjunctival epithelium. Development. 2014 141:4628-4639.
Gupta A., Bischoff A., Peňa A., Runck L.A., Guasch G
The Great divide: septation and malformation of the cloaca, and its implications for surgeons. Pediat Surg Int. 2014, 30(11):1089-95.
Runck LA, Method A, Bischoff A, Levitt M, Peña A, Collins M, Gupta A, Shanmukhappa S, Wells J.M, Guasch G.
Defining the molecular pathologies in cloaca malformation: similarities between mouse and human. Dis Model Mech. 2014, 7(4):483-93.
Archives
Short talk at the regenerative medicine – Organoids and model species – symposium
October, 8th 2018
Our group is recruiting a post-doc interested in using single cell sequencing of transition zone early stage tumors and organoid technology to characterize the pre-tumoral immune environment. Interested? Please send your application to geraldine.guasch-grangeon@inserm.fr
Jan 15th, 2020
Le cancer colorectal : Quelle autonomie de choix pour les patients? Institut Paoli-Calmettes – Marseille
November, 23rd 2018
Geraldine Guasch is scheduled for a talk at the Epithelial Differentiation and Keratinization Gordon Research Conference
July 7-12th, 2019
Interested to collaborate with a French laboratory and obtain an international experience? The call for applications for the Chateaubriand Fellowship is open every year from October to January.
October, 2018
Dr Géraldine GUASCH to give a presentation on “Animal Models” at the next SUNRiSE (Solid Tumor Cancer Stem Cell) network training session.
June, 2018
Louciné Mitoyan representing the lab and CRCM at the 3rd edition of the Aldelih congress. Thank you Dr Cédric Blanpain for your support!
March, 2018
SFC (Société Française du Cancer) training
Stem cells in solid tumors : from biology to therapeutics
November, 2017
New publication
Isolation and Separation of Epithelial CD34+ Cancer Stem Cells from Tgfbr2-deficient Squamous Cell Carcinoma
September, 2017
External Seminar at the Developmental Biology Institute of Marseille (IBDM) :
Transitional zones: merging microenvironments, stem cells and cancer Invitation : A. Le Bivic
April 7th, 2017
New Publication by our lab :
A new mechanism connects the loss of TGFβ signaling with invasion and metastasis in highly malignant transition zone tumors.
February, 2017
Invited Talk at the Erasmus University Medical Center in the Department of Cell Biology, Rotterdam
October, 2016
Gordon Research Conference “Tissue Niches & Resident Stem Cells in Adult Epithelia”
August, 2016
Read More9th grader student Maud Willermoz participated in our research as part of the orientation program promoted by the Ministry of National Education.
December, 2017
Invited Talk at the City University of Hong Kong in the Department of Biomedical Sciences, Hong Kong
August, 2016
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